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* [PATCH 00/33] fbcon notifier begone v3!
@ 2019-05-28  9:02 ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter

Hi all,

I think we're slowly getting there. Previous cover letters with more
context:

https://lists.freedesktop.org/archives/dri-devel/2019-May/218362.html

tldr; I have a multi-year plan to improve fbcon locking, because the
current thing is a bit a mess.

Cover letter of this version, where I detail a bit more the details
fixed in this one here:

https://lists.freedesktop.org/archives/dri-devel/2019-May/218984.html

Note that the locking plan in this one is already outdated, I overlooked a
few fun issues around any printk() going back to console_lock.

I think remaining bits:

- Ack from Daniel Thompson for the backlight bits, he wanted to check the
  big picture.

- Hash out actual merge plan.

I'm also cc'ing the entire pile to a lot more people on request.

Thanks, Daniel

Daniel Vetter (33):
  dummycon: Sprinkle locking checks
  fbdev: locking check for fb_set_suspend
  vt: might_sleep() annotation for do_blank_screen
  vt: More locking checks
  fbdev/sa1100fb: Remove dead code
  fbdev/cyber2000: Remove struct display
  fbdev/aty128fb: Remove dead code
  fbcon: s/struct display/struct fbcon_display/
  fbcon: Remove fbcon_has_exited
  fbcon: call fbcon_fb_(un)registered directly
  fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
  fbdev/omap: sysfs files can't disappear before the device is gone
  fbdev: sysfs files can't disappear before the device is gone
  staging/olpc: lock_fb_info can't fail
  fbdev/atyfb: lock_fb_info can't fail
  fbdev: lock_fb_info cannot fail
  fbcon: call fbcon_fb_bind directly
  fbdev: make unregister/unlink functions not fail
  fbdev: unify unlink_framebuffer paths
  fbdev/sh_mob: Remove fb notifier callback
  fbdev: directly call fbcon_suspended/resumed
  fbcon: Call fbcon_mode_deleted/new_modelist directly
  fbdev: Call fbcon_get_requirement directly
  Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
  fbmem: pull fbcon_fb_blanked out of fb_blank
  fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
  fb: Flatten control flow in fb_set_var
  fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
  vgaswitcheroo: call fbcon_remap_all directly
  fbcon: Call con2fb_map functions directly
  fbcon: Document what I learned about fbcon locking
  staging/olpc_dcon: Add drm conversion to TODO
  backlight: simplify lcd notifier

 arch/arm/mach-pxa/am200epd.c                  |  13 +-
 drivers/gpu/vga/vga_switcheroo.c              |  11 +-
 drivers/media/pci/ivtv/ivtvfb.c               |   6 +-
 drivers/staging/fbtft/fbtft-core.c            |   4 +-
 drivers/staging/olpc_dcon/TODO                |   7 +
 drivers/staging/olpc_dcon/olpc_dcon.c         |   6 +-
 drivers/tty/vt/vt.c                           |  18 +
 drivers/video/backlight/backlight.c           |   2 +-
 drivers/video/backlight/lcd.c                 |  12 -
 drivers/video/console/dummycon.c              |   6 +
 drivers/video/fbdev/aty/aty128fb.c            |  64 ---
 drivers/video/fbdev/aty/atyfb_base.c          |   3 +-
 drivers/video/fbdev/core/fbcmap.c             |   6 +-
 drivers/video/fbdev/core/fbcon.c              | 313 ++++++--------
 drivers/video/fbdev/core/fbcon.h              |   6 +-
 drivers/video/fbdev/core/fbmem.c              | 399 +++++++-----------
 drivers/video/fbdev/core/fbsysfs.c            |  20 +-
 drivers/video/fbdev/cyber2000fb.c             |   1 -
 drivers/video/fbdev/neofb.c                   |   9 +-
 .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   |  21 +-
 drivers/video/fbdev/sa1100fb.c                |  25 --
 drivers/video/fbdev/savage/savagefb_driver.c  |   9 +-
 drivers/video/fbdev/sh_mobile_lcdcfb.c        | 132 +-----
 drivers/video/fbdev/sh_mobile_lcdcfb.h        |   5 -
 include/linux/console_struct.h                |   5 +-
 include/linux/fb.h                            |  45 +-
 include/linux/fbcon.h                         |  30 ++
 27 files changed, 396 insertions(+), 782 deletions(-)

-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 00/33] fbcon notifier begone v3!
@ 2019-05-28  9:02 ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter

Hi all,

I think we're slowly getting there. Previous cover letters with more
context:

https://lists.freedesktop.org/archives/dri-devel/2019-May/218362.html

tldr; I have a multi-year plan to improve fbcon locking, because the
current thing is a bit a mess.

Cover letter of this version, where I detail a bit more the details
fixed in this one here:

https://lists.freedesktop.org/archives/dri-devel/2019-May/218984.html

Note that the locking plan in this one is already outdated, I overlooked a
few fun issues around any printk() going back to console_lock.

I think remaining bits:

- Ack from Daniel Thompson for the backlight bits, he wanted to check the
  big picture.

- Hash out actual merge plan.

I'm also cc'ing the entire pile to a lot more people on request.

Thanks, Daniel

Daniel Vetter (33):
  dummycon: Sprinkle locking checks
  fbdev: locking check for fb_set_suspend
  vt: might_sleep() annotation for do_blank_screen
  vt: More locking checks
  fbdev/sa1100fb: Remove dead code
  fbdev/cyber2000: Remove struct display
  fbdev/aty128fb: Remove dead code
  fbcon: s/struct display/struct fbcon_display/
  fbcon: Remove fbcon_has_exited
  fbcon: call fbcon_fb_(un)registered directly
  fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
  fbdev/omap: sysfs files can't disappear before the device is gone
  fbdev: sysfs files can't disappear before the device is gone
  staging/olpc: lock_fb_info can't fail
  fbdev/atyfb: lock_fb_info can't fail
  fbdev: lock_fb_info cannot fail
  fbcon: call fbcon_fb_bind directly
  fbdev: make unregister/unlink functions not fail
  fbdev: unify unlink_framebuffer paths
  fbdev/sh_mob: Remove fb notifier callback
  fbdev: directly call fbcon_suspended/resumed
  fbcon: Call fbcon_mode_deleted/new_modelist directly
  fbdev: Call fbcon_get_requirement directly
  Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
  fbmem: pull fbcon_fb_blanked out of fb_blank
  fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
  fb: Flatten control flow in fb_set_var
  fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
  vgaswitcheroo: call fbcon_remap_all directly
  fbcon: Call con2fb_map functions directly
  fbcon: Document what I learned about fbcon locking
  staging/olpc_dcon: Add drm conversion to TODO
  backlight: simplify lcd notifier

 arch/arm/mach-pxa/am200epd.c                  |  13 +-
 drivers/gpu/vga/vga_switcheroo.c              |  11 +-
 drivers/media/pci/ivtv/ivtvfb.c               |   6 +-
 drivers/staging/fbtft/fbtft-core.c            |   4 +-
 drivers/staging/olpc_dcon/TODO                |   7 +
 drivers/staging/olpc_dcon/olpc_dcon.c         |   6 +-
 drivers/tty/vt/vt.c                           |  18 +
 drivers/video/backlight/backlight.c           |   2 +-
 drivers/video/backlight/lcd.c                 |  12 -
 drivers/video/console/dummycon.c              |   6 +
 drivers/video/fbdev/aty/aty128fb.c            |  64 ---
 drivers/video/fbdev/aty/atyfb_base.c          |   3 +-
 drivers/video/fbdev/core/fbcmap.c             |   6 +-
 drivers/video/fbdev/core/fbcon.c              | 313 ++++++--------
 drivers/video/fbdev/core/fbcon.h              |   6 +-
 drivers/video/fbdev/core/fbmem.c              | 399 +++++++-----------
 drivers/video/fbdev/core/fbsysfs.c            |  20 +-
 drivers/video/fbdev/cyber2000fb.c             |   1 -
 drivers/video/fbdev/neofb.c                   |   9 +-
 .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   |  21 +-
 drivers/video/fbdev/sa1100fb.c                |  25 --
 drivers/video/fbdev/savage/savagefb_driver.c  |   9 +-
 drivers/video/fbdev/sh_mobile_lcdcfb.c        | 132 +-----
 drivers/video/fbdev/sh_mobile_lcdcfb.h        |   5 -
 include/linux/console_struct.h                |   5 +-
 include/linux/fb.h                            |  45 +-
 include/linux/fbcon.h                         |  30 ++
 27 files changed, 396 insertions(+), 782 deletions(-)

-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 01/33] dummycon: Sprinkle locking checks
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Greg Kroah-Hartman, Kees Cook, Nicolas Pitre

As part of trying to understand the locking (or lack thereof) in the
fbcon/vt/fbdev maze, annotate everything.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
---
 drivers/video/console/dummycon.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/video/console/dummycon.c b/drivers/video/console/dummycon.c
index ff886e99104b..2a0d0bda7faa 100644
--- a/drivers/video/console/dummycon.c
+++ b/drivers/video/console/dummycon.c
@@ -34,6 +34,8 @@ static bool dummycon_putc_called;
 
 void dummycon_register_output_notifier(struct notifier_block *nb)
 {
+	WARN_CONSOLE_UNLOCKED();
+
 	raw_notifier_chain_register(&dummycon_output_nh, nb);
 
 	if (dummycon_putc_called)
@@ -42,11 +44,15 @@ void dummycon_register_output_notifier(struct notifier_block *nb)
 
 void dummycon_unregister_output_notifier(struct notifier_block *nb)
 {
+	WARN_CONSOLE_UNLOCKED();
+
 	raw_notifier_chain_unregister(&dummycon_output_nh, nb);
 }
 
 static void dummycon_putc(struct vc_data *vc, int c, int ypos, int xpos)
 {
+	WARN_CONSOLE_UNLOCKED();
+
 	dummycon_putc_called = true;
 	raw_notifier_call_chain(&dummycon_output_nh, 0, NULL);
 }
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 01/33] dummycon: Sprinkle locking checks
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Greg Kroah-Hartman, Kees Cook, Nicolas Pitre

As part of trying to understand the locking (or lack thereof) in the
fbcon/vt/fbdev maze, annotate everything.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
---
 drivers/video/console/dummycon.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/video/console/dummycon.c b/drivers/video/console/dummycon.c
index ff886e99104b..2a0d0bda7faa 100644
--- a/drivers/video/console/dummycon.c
+++ b/drivers/video/console/dummycon.c
@@ -34,6 +34,8 @@ static bool dummycon_putc_called;
 
 void dummycon_register_output_notifier(struct notifier_block *nb)
 {
+	WARN_CONSOLE_UNLOCKED();
+
 	raw_notifier_chain_register(&dummycon_output_nh, nb);
 
 	if (dummycon_putc_called)
@@ -42,11 +44,15 @@ void dummycon_register_output_notifier(struct notifier_block *nb)
 
 void dummycon_unregister_output_notifier(struct notifier_block *nb)
 {
+	WARN_CONSOLE_UNLOCKED();
+
 	raw_notifier_chain_unregister(&dummycon_output_nh, nb);
 }
 
 static void dummycon_putc(struct vc_data *vc, int c, int ypos, int xpos)
 {
+	WARN_CONSOLE_UNLOCKED();
+
 	dummycon_putc_called = true;
 	raw_notifier_call_chain(&dummycon_output_nh, 0, NULL);
 }
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 02/33] fbdev: locking check for fb_set_suspend
  2019-05-28  9:02 ` Daniel Vetter
  (?)
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst,
	Michał Mirosław, Peter Rosin, Hans de Goede,
	Thomas Zimmermann, Manfred Schlaegl, Mikulas Patocka, Kees Cook

Just drive-by, nothing systematic yet.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Manfred Schlaegl <manfred.schlaegl@ginzinger.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
---
 drivers/video/fbdev/core/fbmem.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index d1949c92be98..8ba674ffb3c9 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1985,6 +1985,8 @@ void fb_set_suspend(struct fb_info *info, int state)
 {
 	struct fb_event event;
 
+	WARN_CONSOLE_UNLOCKED();
+
 	event.info = info;
 	if (state) {
 		fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 02/33] fbdev: locking check for fb_set_suspend
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Kees Cook, Bartlomiej Zolnierkiewicz,
	Manfred Schlaegl, Daniel Vetter, Intel Graphics Development,
	linux-fbdev, DRI Development, Michał Mirosław,
	Mikulas Patocka, Thomas Zimmermann, Daniel Vetter, Sam Ravnborg,
	Peter Rosin

Just drive-by, nothing systematic yet.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Manfred Schlaegl <manfred.schlaegl@ginzinger.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
---
 drivers/video/fbdev/core/fbmem.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index d1949c92be98..8ba674ffb3c9 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1985,6 +1985,8 @@ void fb_set_suspend(struct fb_info *info, int state)
 {
 	struct fb_event event;
 
+	WARN_CONSOLE_UNLOCKED();
+
 	event.info = info;
 	if (state) {
 		fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 02/33] fbdev: locking check for fb_set_suspend
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Kees Cook, Bartlomiej Zolnierkiewicz,
	Manfred Schlaegl, Daniel Vetter, Intel Graphics Development,
	linux-fbdev, DRI Development, Michał Mirosław,
	Mikulas Patocka, Thomas Zimmermann, Daniel Vetter, Sam Ravnborg,
	Peter Rosin

Just drive-by, nothing systematic yet.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Manfred Schlaegl <manfred.schlaegl@ginzinger.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
---
 drivers/video/fbdev/core/fbmem.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index d1949c92be98..8ba674ffb3c9 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1985,6 +1985,8 @@ void fb_set_suspend(struct fb_info *info, int state)
 {
 	struct fb_event event;
 
+	WARN_CONSOLE_UNLOCKED();
+
 	event.info = info;
 	if (state) {
 		fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
-- 
2.20.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 03/33] vt: might_sleep() annotation for do_blank_screen
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Greg Kroah-Hartman,
	Maarten Lankhorst, Nicolas Pitre, Adam Borowski,
	Martin Hostettler, Mikulas Patocka

For symmetry reasons with do_unblank_screen, except without the
oops_in_progress special case.

Just a drive-by annotation while I'm trying to untangle the fbcon vs.
fbdev screen blank/unblank maze.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Adam Borowski <kilobyte@angband.pl>
Cc: Martin Hostettler <textshell@uchuujin.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Mikulas Patocka <mpatocka@redhat.com>
---
 drivers/tty/vt/vt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index fdd12f8c3deb..bc9813b14c58 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -4159,6 +4159,8 @@ void do_blank_screen(int entering_gfx)
 	struct vc_data *vc = vc_cons[fg_console].d;
 	int i;
 
+	might_sleep();
+
 	WARN_CONSOLE_UNLOCKED();
 
 	if (console_blanked) {
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 03/33] vt: might_sleep() annotation for do_blank_screen
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Greg Kroah-Hartman,
	Maarten Lankhorst, Nicolas Pitre, Adam Borowski,
	Martin Hostettler, Mikulas Patocka

For symmetry reasons with do_unblank_screen, except without the
oops_in_progress special case.

Just a drive-by annotation while I'm trying to untangle the fbcon vs.
fbdev screen blank/unblank maze.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Adam Borowski <kilobyte@angband.pl>
Cc: Martin Hostettler <textshell@uchuujin.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Mikulas Patocka <mpatocka@redhat.com>
---
 drivers/tty/vt/vt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index fdd12f8c3deb..bc9813b14c58 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -4159,6 +4159,8 @@ void do_blank_screen(int entering_gfx)
 	struct vc_data *vc = vc_cons[fg_console].d;
 	int i;
 
+	might_sleep();
+
 	WARN_CONSOLE_UNLOCKED();
 
 	if (console_blanked) {
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 04/33] vt: More locking checks
  2019-05-28  9:02 ` Daniel Vetter
  (?)
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Greg Kroah-Hartman,
	Maarten Lankhorst, Nicolas Pitre, Martin Hostettler,
	Adam Borowski, Mikulas Patocka

I honestly have no idea what the subtle differences between
con_is_visible, con_is_fg (internal to vt.c) and con_is_bound are. But
it looks like both vc->vc_display_fg and con_driver_map are protected
by the console_lock, so probably better if we hold that when checking
this.

To do that I had to deinline the con_is_visible function.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Martin Hostettler <textshell@uchuujin.de>
Cc: Adam Borowski <kilobyte@angband.pl>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Mikulas Patocka <mpatocka@redhat.com>
---
 drivers/tty/vt/vt.c            | 16 ++++++++++++++++
 include/linux/console_struct.h |  5 +----
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index bc9813b14c58..a8988a085138 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3815,6 +3815,8 @@ int con_is_bound(const struct consw *csw)
 {
 	int i, bound = 0;
 
+	WARN_CONSOLE_UNLOCKED();
+
 	for (i = 0; i < MAX_NR_CONSOLES; i++) {
 		if (con_driver_map[i] == csw) {
 			bound = 1;
@@ -3826,6 +3828,20 @@ int con_is_bound(const struct consw *csw)
 }
 EXPORT_SYMBOL(con_is_bound);
 
+/**
+ * con_is_visible - checks whether the current console is visible
+ * @vc: virtual console
+ *
+ * RETURNS: zero if not visible, nonzero if visible
+ */
+bool con_is_visible(const struct vc_data *vc)
+{
+	WARN_CONSOLE_UNLOCKED();
+
+	return *vc->vc_display_fg == vc;
+}
+EXPORT_SYMBOL(con_is_visible);
+
 /**
  * con_debug_enter - prepare the console for the kernel debugger
  * @sw: console driver
diff --git a/include/linux/console_struct.h b/include/linux/console_struct.h
index ed798e114663..24d4c16e3ae0 100644
--- a/include/linux/console_struct.h
+++ b/include/linux/console_struct.h
@@ -168,9 +168,6 @@ extern void vc_SAK(struct work_struct *work);
 
 #define CUR_DEFAULT CUR_UNDERLINE
 
-static inline bool con_is_visible(const struct vc_data *vc)
-{
-	return *vc->vc_display_fg == vc;
-}
+bool con_is_visible(const struct vc_data *vc);
 
 #endif /* _LINUX_CONSOLE_STRUCT_H */
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 04/33] vt: More locking checks
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Nicolas Pitre, Adam Borowski, Daniel Thompson,
	Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Martin Hostettler, Mikulas Patocka, Greg Kroah-Hartman,
	Daniel Vetter, Sam Ravnborg

I honestly have no idea what the subtle differences between
con_is_visible, con_is_fg (internal to vt.c) and con_is_bound are. But
it looks like both vc->vc_display_fg and con_driver_map are protected
by the console_lock, so probably better if we hold that when checking
this.

To do that I had to deinline the con_is_visible function.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Martin Hostettler <textshell@uchuujin.de>
Cc: Adam Borowski <kilobyte@angband.pl>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Mikulas Patocka <mpatocka@redhat.com>
---
 drivers/tty/vt/vt.c            | 16 ++++++++++++++++
 include/linux/console_struct.h |  5 +----
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index bc9813b14c58..a8988a085138 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3815,6 +3815,8 @@ int con_is_bound(const struct consw *csw)
 {
 	int i, bound = 0;
 
+	WARN_CONSOLE_UNLOCKED();
+
 	for (i = 0; i < MAX_NR_CONSOLES; i++) {
 		if (con_driver_map[i] = csw) {
 			bound = 1;
@@ -3826,6 +3828,20 @@ int con_is_bound(const struct consw *csw)
 }
 EXPORT_SYMBOL(con_is_bound);
 
+/**
+ * con_is_visible - checks whether the current console is visible
+ * @vc: virtual console
+ *
+ * RETURNS: zero if not visible, nonzero if visible
+ */
+bool con_is_visible(const struct vc_data *vc)
+{
+	WARN_CONSOLE_UNLOCKED();
+
+	return *vc->vc_display_fg = vc;
+}
+EXPORT_SYMBOL(con_is_visible);
+
 /**
  * con_debug_enter - prepare the console for the kernel debugger
  * @sw: console driver
diff --git a/include/linux/console_struct.h b/include/linux/console_struct.h
index ed798e114663..24d4c16e3ae0 100644
--- a/include/linux/console_struct.h
+++ b/include/linux/console_struct.h
@@ -168,9 +168,6 @@ extern void vc_SAK(struct work_struct *work);
 
 #define CUR_DEFAULT CUR_UNDERLINE
 
-static inline bool con_is_visible(const struct vc_data *vc)
-{
-	return *vc->vc_display_fg = vc;
-}
+bool con_is_visible(const struct vc_data *vc);
 
 #endif /* _LINUX_CONSOLE_STRUCT_H */
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 04/33] vt: More locking checks
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Nicolas Pitre, Adam Borowski, Daniel Thompson,
	Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Martin Hostettler, Mikulas Patocka, Greg Kroah-Hartman,
	Daniel Vetter, Sam Ravnborg

I honestly have no idea what the subtle differences between
con_is_visible, con_is_fg (internal to vt.c) and con_is_bound are. But
it looks like both vc->vc_display_fg and con_driver_map are protected
by the console_lock, so probably better if we hold that when checking
this.

To do that I had to deinline the con_is_visible function.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Martin Hostettler <textshell@uchuujin.de>
Cc: Adam Borowski <kilobyte@angband.pl>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Mikulas Patocka <mpatocka@redhat.com>
---
 drivers/tty/vt/vt.c            | 16 ++++++++++++++++
 include/linux/console_struct.h |  5 +----
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index bc9813b14c58..a8988a085138 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3815,6 +3815,8 @@ int con_is_bound(const struct consw *csw)
 {
 	int i, bound = 0;
 
+	WARN_CONSOLE_UNLOCKED();
+
 	for (i = 0; i < MAX_NR_CONSOLES; i++) {
 		if (con_driver_map[i] == csw) {
 			bound = 1;
@@ -3826,6 +3828,20 @@ int con_is_bound(const struct consw *csw)
 }
 EXPORT_SYMBOL(con_is_bound);
 
+/**
+ * con_is_visible - checks whether the current console is visible
+ * @vc: virtual console
+ *
+ * RETURNS: zero if not visible, nonzero if visible
+ */
+bool con_is_visible(const struct vc_data *vc)
+{
+	WARN_CONSOLE_UNLOCKED();
+
+	return *vc->vc_display_fg == vc;
+}
+EXPORT_SYMBOL(con_is_visible);
+
 /**
  * con_debug_enter - prepare the console for the kernel debugger
  * @sw: console driver
diff --git a/include/linux/console_struct.h b/include/linux/console_struct.h
index ed798e114663..24d4c16e3ae0 100644
--- a/include/linux/console_struct.h
+++ b/include/linux/console_struct.h
@@ -168,9 +168,6 @@ extern void vc_SAK(struct work_struct *work);
 
 #define CUR_DEFAULT CUR_UNDERLINE
 
-static inline bool con_is_visible(const struct vc_data *vc)
-{
-	return *vc->vc_display_fg == vc;
-}
+bool con_is_visible(const struct vc_data *vc);
 
 #endif /* _LINUX_CONSOLE_STRUCT_H */
-- 
2.20.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 05/33] fbdev/sa1100fb: Remove dead code
  2019-05-28  9:02 ` Daniel Vetter
  (?)
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst

Motivated because it contains a struct display, which is a fbcon
internal data structure that I want to rename. It seems to have been
formerly used in drivers, but that's very long time ago.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/video/fbdev/sa1100fb.c | 25 -------------------------
 1 file changed, 25 deletions(-)

diff --git a/drivers/video/fbdev/sa1100fb.c b/drivers/video/fbdev/sa1100fb.c
index 15ae50063296..f7f8dee044b1 100644
--- a/drivers/video/fbdev/sa1100fb.c
+++ b/drivers/video/fbdev/sa1100fb.c
@@ -974,35 +974,10 @@ static void sa1100fb_task(struct work_struct *w)
  */
 static unsigned int sa1100fb_min_dma_period(struct sa1100fb_info *fbi)
 {
-#if 0
-	unsigned int min_period = (unsigned int)-1;
-	int i;
-
-	for (i = 0; i < MAX_NR_CONSOLES; i++) {
-		struct display *disp = &fb_display[i];
-		unsigned int period;
-
-		/*
-		 * Do we own this display?
-		 */
-		if (disp->fb_info != &fbi->fb)
-			continue;
-
-		/*
-		 * Ok, calculate its DMA period
-		 */
-		period = sa1100fb_display_dma_period(&disp->var);
-		if (period < min_period)
-			min_period = period;
-	}
-
-	return min_period;
-#else
 	/*
 	 * FIXME: we need to verify _all_ consoles.
 	 */
 	return sa1100fb_display_dma_period(&fbi->fb.var);
-#endif
 }
 
 /*
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 05/33] fbdev/sa1100fb: Remove dead code
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Daniel Vetter, Sam Ravnborg

Motivated because it contains a struct display, which is a fbcon
internal data structure that I want to rename. It seems to have been
formerly used in drivers, but that's very long time ago.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/video/fbdev/sa1100fb.c | 25 -------------------------
 1 file changed, 25 deletions(-)

diff --git a/drivers/video/fbdev/sa1100fb.c b/drivers/video/fbdev/sa1100fb.c
index 15ae50063296..f7f8dee044b1 100644
--- a/drivers/video/fbdev/sa1100fb.c
+++ b/drivers/video/fbdev/sa1100fb.c
@@ -974,35 +974,10 @@ static void sa1100fb_task(struct work_struct *w)
  */
 static unsigned int sa1100fb_min_dma_period(struct sa1100fb_info *fbi)
 {
-#if 0
-	unsigned int min_period = (unsigned int)-1;
-	int i;
-
-	for (i = 0; i < MAX_NR_CONSOLES; i++) {
-		struct display *disp = &fb_display[i];
-		unsigned int period;
-
-		/*
-		 * Do we own this display?
-		 */
-		if (disp->fb_info != &fbi->fb)
-			continue;
-
-		/*
-		 * Ok, calculate its DMA period
-		 */
-		period = sa1100fb_display_dma_period(&disp->var);
-		if (period < min_period)
-			min_period = period;
-	}
-
-	return min_period;
-#else
 	/*
 	 * FIXME: we need to verify _all_ consoles.
 	 */
 	return sa1100fb_display_dma_period(&fbi->fb.var);
-#endif
 }
 
 /*
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 05/33] fbdev/sa1100fb: Remove dead code
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Daniel Vetter, Sam Ravnborg

Motivated because it contains a struct display, which is a fbcon
internal data structure that I want to rename. It seems to have been
formerly used in drivers, but that's very long time ago.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/video/fbdev/sa1100fb.c | 25 -------------------------
 1 file changed, 25 deletions(-)

diff --git a/drivers/video/fbdev/sa1100fb.c b/drivers/video/fbdev/sa1100fb.c
index 15ae50063296..f7f8dee044b1 100644
--- a/drivers/video/fbdev/sa1100fb.c
+++ b/drivers/video/fbdev/sa1100fb.c
@@ -974,35 +974,10 @@ static void sa1100fb_task(struct work_struct *w)
  */
 static unsigned int sa1100fb_min_dma_period(struct sa1100fb_info *fbi)
 {
-#if 0
-	unsigned int min_period = (unsigned int)-1;
-	int i;
-
-	for (i = 0; i < MAX_NR_CONSOLES; i++) {
-		struct display *disp = &fb_display[i];
-		unsigned int period;
-
-		/*
-		 * Do we own this display?
-		 */
-		if (disp->fb_info != &fbi->fb)
-			continue;
-
-		/*
-		 * Ok, calculate its DMA period
-		 */
-		period = sa1100fb_display_dma_period(&disp->var);
-		if (period < min_period)
-			min_period = period;
-	}
-
-	return min_period;
-#else
 	/*
 	 * FIXME: we need to verify _all_ consoles.
 	 */
 	return sa1100fb_display_dma_period(&fbi->fb.var);
-#endif
 }
 
 /*
-- 
2.20.1

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 06/33] fbdev/cyber2000: Remove struct display
  2019-05-28  9:02 ` Daniel Vetter
  (?)
  (?)
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Russell King,
	linux-arm-kernel

Entirely unused.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
---
 drivers/video/fbdev/cyber2000fb.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/video/fbdev/cyber2000fb.c b/drivers/video/fbdev/cyber2000fb.c
index 9a5751cb4e16..452ef07b3a06 100644
--- a/drivers/video/fbdev/cyber2000fb.c
+++ b/drivers/video/fbdev/cyber2000fb.c
@@ -61,7 +61,6 @@
 struct cfb_info {
 	struct fb_info		fb;
 	struct display_switch	*dispsw;
-	struct display		*display;
 	unsigned char		__iomem *region;
 	unsigned char		__iomem *regs;
 	u_int			id;
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 06/33] fbdev/cyber2000: Remove struct display
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, Maarten Lankhorst, linux-fbdev,
	DRI Development, Russell King, Daniel Vetter, Sam Ravnborg,
	linux-arm-kernel

Entirely unused.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
---
 drivers/video/fbdev/cyber2000fb.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/video/fbdev/cyber2000fb.c b/drivers/video/fbdev/cyber2000fb.c
index 9a5751cb4e16..452ef07b3a06 100644
--- a/drivers/video/fbdev/cyber2000fb.c
+++ b/drivers/video/fbdev/cyber2000fb.c
@@ -61,7 +61,6 @@
 struct cfb_info {
 	struct fb_info		fb;
 	struct display_switch	*dispsw;
-	struct display		*display;
 	unsigned char		__iomem *region;
 	unsigned char		__iomem *regs;
 	u_int			id;
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 06/33] fbdev/cyber2000: Remove struct display
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, Maarten Lankhorst, linux-fbdev,
	DRI Development, Russell King, Daniel Vetter, Sam Ravnborg,
	linux-arm-kernel

Entirely unused.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
---
 drivers/video/fbdev/cyber2000fb.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/video/fbdev/cyber2000fb.c b/drivers/video/fbdev/cyber2000fb.c
index 9a5751cb4e16..452ef07b3a06 100644
--- a/drivers/video/fbdev/cyber2000fb.c
+++ b/drivers/video/fbdev/cyber2000fb.c
@@ -61,7 +61,6 @@
 struct cfb_info {
 	struct fb_info		fb;
 	struct display_switch	*dispsw;
-	struct display		*display;
 	unsigned char		__iomem *region;
 	unsigned char		__iomem *regs;
 	u_int			id;
-- 
2.20.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 06/33] fbdev/cyber2000: Remove struct display
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, Maarten Lankhorst, linux-fbdev,
	DRI Development, Russell King, Daniel Vetter, Sam Ravnborg,
	linux-arm-kernel

Entirely unused.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
---
 drivers/video/fbdev/cyber2000fb.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/video/fbdev/cyber2000fb.c b/drivers/video/fbdev/cyber2000fb.c
index 9a5751cb4e16..452ef07b3a06 100644
--- a/drivers/video/fbdev/cyber2000fb.c
+++ b/drivers/video/fbdev/cyber2000fb.c
@@ -61,7 +61,6 @@
 struct cfb_info {
 	struct fb_info		fb;
 	struct display_switch	*dispsw;
-	struct display		*display;
 	unsigned char		__iomem *region;
 	unsigned char		__iomem *regs;
 	u_int			id;
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 07/33] fbdev/aty128fb: Remove dead code
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Paul Mackerras

Motivated because it contains a struct display, which is a fbcon
internal data structure that I want to rename. It seems to have been
formerly used in drivers, but that's very long time ago.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/aty/aty128fb.c | 64 ------------------------------
 1 file changed, 64 deletions(-)

diff --git a/drivers/video/fbdev/aty/aty128fb.c b/drivers/video/fbdev/aty/aty128fb.c
index 794434891291..b02e67528a99 100644
--- a/drivers/video/fbdev/aty/aty128fb.c
+++ b/drivers/video/fbdev/aty/aty128fb.c
@@ -2350,70 +2350,6 @@ static int aty128fb_ioctl(struct fb_info *info, u_int cmd, u_long arg)
 	return -EINVAL;
 }
 
-#if 0
-    /*
-     *  Accelerated functions
-     */
-
-static inline void aty128_rectcopy(int srcx, int srcy, int dstx, int dsty,
-				   u_int width, u_int height,
-				   struct fb_info_aty128 *par)
-{
-	u32 save_dp_datatype, save_dp_cntl, dstval;
-
-	if (!width || !height)
-		return;
-
-	dstval = depth_to_dst(par->current_par.crtc.depth);
-	if (dstval == DST_24BPP) {
-		srcx *= 3;
-		dstx *= 3;
-		width *= 3;
-	} else if (dstval == -EINVAL) {
-		printk("aty128fb: invalid depth or RGBA\n");
-		return;
-	}
-
-	wait_for_fifo(2, par);
-	save_dp_datatype = aty_ld_le32(DP_DATATYPE);
-	save_dp_cntl     = aty_ld_le32(DP_CNTL);
-
-	wait_for_fifo(6, par);
-	aty_st_le32(SRC_Y_X, (srcy << 16) | srcx);
-	aty_st_le32(DP_MIX, ROP3_SRCCOPY | DP_SRC_RECT);
-	aty_st_le32(DP_CNTL, DST_X_LEFT_TO_RIGHT | DST_Y_TOP_TO_BOTTOM);
-	aty_st_le32(DP_DATATYPE, save_dp_datatype | dstval | SRC_DSTCOLOR);
-
-	aty_st_le32(DST_Y_X, (dsty << 16) | dstx);
-	aty_st_le32(DST_HEIGHT_WIDTH, (height << 16) | width);
-
-	par->blitter_may_be_busy = 1;
-
-	wait_for_fifo(2, par);
-	aty_st_le32(DP_DATATYPE, save_dp_datatype);
-	aty_st_le32(DP_CNTL, save_dp_cntl);
-}
-
-
-    /*
-     * Text mode accelerated functions
-     */
-
-static void fbcon_aty128_bmove(struct display *p, int sy, int sx, int dy,
-			       int dx, int height, int width)
-{
-	sx     *= fontwidth(p);
-	sy     *= fontheight(p);
-	dx     *= fontwidth(p);
-	dy     *= fontheight(p);
-	width  *= fontwidth(p);
-	height *= fontheight(p);
-
-	aty128_rectcopy(sx, sy, dx, dy, width, height,
-			(struct fb_info_aty128 *)p->fb_info);
-}
-#endif /* 0 */
-
 static void aty128_set_suspend(struct aty128fb_par *par, int suspend)
 {
 	u32	pmgt;
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 07/33] fbdev/aty128fb: Remove dead code
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Paul Mackerras

Motivated because it contains a struct display, which is a fbcon
internal data structure that I want to rename. It seems to have been
formerly used in drivers, but that's very long time ago.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/aty/aty128fb.c | 64 ------------------------------
 1 file changed, 64 deletions(-)

diff --git a/drivers/video/fbdev/aty/aty128fb.c b/drivers/video/fbdev/aty/aty128fb.c
index 794434891291..b02e67528a99 100644
--- a/drivers/video/fbdev/aty/aty128fb.c
+++ b/drivers/video/fbdev/aty/aty128fb.c
@@ -2350,70 +2350,6 @@ static int aty128fb_ioctl(struct fb_info *info, u_int cmd, u_long arg)
 	return -EINVAL;
 }
 
-#if 0
-    /*
-     *  Accelerated functions
-     */
-
-static inline void aty128_rectcopy(int srcx, int srcy, int dstx, int dsty,
-				   u_int width, u_int height,
-				   struct fb_info_aty128 *par)
-{
-	u32 save_dp_datatype, save_dp_cntl, dstval;
-
-	if (!width || !height)
-		return;
-
-	dstval = depth_to_dst(par->current_par.crtc.depth);
-	if (dstval = DST_24BPP) {
-		srcx *= 3;
-		dstx *= 3;
-		width *= 3;
-	} else if (dstval = -EINVAL) {
-		printk("aty128fb: invalid depth or RGBA\n");
-		return;
-	}
-
-	wait_for_fifo(2, par);
-	save_dp_datatype = aty_ld_le32(DP_DATATYPE);
-	save_dp_cntl     = aty_ld_le32(DP_CNTL);
-
-	wait_for_fifo(6, par);
-	aty_st_le32(SRC_Y_X, (srcy << 16) | srcx);
-	aty_st_le32(DP_MIX, ROP3_SRCCOPY | DP_SRC_RECT);
-	aty_st_le32(DP_CNTL, DST_X_LEFT_TO_RIGHT | DST_Y_TOP_TO_BOTTOM);
-	aty_st_le32(DP_DATATYPE, save_dp_datatype | dstval | SRC_DSTCOLOR);
-
-	aty_st_le32(DST_Y_X, (dsty << 16) | dstx);
-	aty_st_le32(DST_HEIGHT_WIDTH, (height << 16) | width);
-
-	par->blitter_may_be_busy = 1;
-
-	wait_for_fifo(2, par);
-	aty_st_le32(DP_DATATYPE, save_dp_datatype);
-	aty_st_le32(DP_CNTL, save_dp_cntl);
-}
-
-
-    /*
-     * Text mode accelerated functions
-     */
-
-static void fbcon_aty128_bmove(struct display *p, int sy, int sx, int dy,
-			       int dx, int height, int width)
-{
-	sx     *= fontwidth(p);
-	sy     *= fontheight(p);
-	dx     *= fontwidth(p);
-	dy     *= fontheight(p);
-	width  *= fontwidth(p);
-	height *= fontheight(p);
-
-	aty128_rectcopy(sx, sy, dx, dy, width, height,
-			(struct fb_info_aty128 *)p->fb_info);
-}
-#endif /* 0 */
-
 static void aty128_set_suspend(struct aty128fb_par *par, int suspend)
 {
 	u32	pmgt;
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 08/33] fbcon: s/struct display/struct fbcon_display/
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Greg Kroah-Hartman, Kees Cook, Prarit Bhargava,
	Konstantin Khorenko, Peter Rosin, Yisheng Xie

This was formerly used in fbdev drivers (not sure why, predates most
git history), but now it's entirely an fbcon internal thing. Give it a
more specific name.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Peter Rosin <peda@axentia.se>
Cc: Yisheng Xie <ysxie@foxmail.com>
---
 drivers/video/fbdev/core/fbcon.c | 74 ++++++++++++++++----------------
 drivers/video/fbdev/core/fbcon.h |  6 +--
 2 files changed, 40 insertions(+), 40 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 786f9aab55df..5424051c8e1a 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -93,7 +93,7 @@ enum {
 	FBCON_LOGO_DONTSHOW	= -3	/* do not show the logo */
 };
 
-static struct display fb_display[MAX_NR_CONSOLES];
+static struct fbcon_display fb_display[MAX_NR_CONSOLES];
 
 static signed char con2fb_map[MAX_NR_CONSOLES];
 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
@@ -185,11 +185,11 @@ static __inline__ void ywrap_up(struct vc_data *vc, int count);
 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 static __inline__ void ypan_up(struct vc_data *vc, int count);
 static __inline__ void ypan_down(struct vc_data *vc, int count);
-static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
+static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
 			    int dy, int dx, int height, int width, u_int y_break);
 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 			   int unit);
-static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
+static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
 			      int line, int count, int dy);
 static void fbcon_modechanged(struct fb_info *info);
 static void fbcon_set_all_vcs(struct fb_info *info);
@@ -220,7 +220,7 @@ static void fbcon_rotate(struct fb_info *info, u32 rotate)
 	fb_info = registered_fb[con2fb_map[ops->currcon]];
 
 	if (info == fb_info) {
-		struct display *p = &fb_display[ops->currcon];
+		struct fbcon_display *p = &fb_display[ops->currcon];
 
 		if (rotate < 4)
 			p->con_rotate = rotate;
@@ -235,7 +235,7 @@ static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 {
 	struct fbcon_ops *ops = info->fbcon_par;
 	struct vc_data *vc;
-	struct display *p;
+	struct fbcon_display *p;
 	int i;
 
 	if (!ops || ops->currcon < 0 || rotate > 3)
@@ -900,7 +900,7 @@ static int set_con2fb_map(int unit, int newidx, int user)
  *  Low Level Operations
  */
 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
-static int var_to_display(struct display *disp,
+static int var_to_display(struct fbcon_display *disp,
 			  struct fb_var_screeninfo *var,
 			  struct fb_info *info)
 {
@@ -925,7 +925,7 @@ static int var_to_display(struct display *disp,
 }
 
 static void display_to_var(struct fb_var_screeninfo *var,
-			   struct display *disp)
+			   struct fbcon_display *disp)
 {
 	fb_videomode_to_var(var, disp->mode);
 	var->xres_virtual = disp->xres_virtual;
@@ -946,7 +946,7 @@ static void display_to_var(struct fb_var_screeninfo *var,
 static const char *fbcon_startup(void)
 {
 	const char *display_desc = "frame buffer device";
-	struct display *p = &fb_display[fg_console];
+	struct fbcon_display *p = &fb_display[fg_console];
 	struct vc_data *vc = vc_cons[fg_console].d;
 	const struct font_desc *font = NULL;
 	struct module *owner;
@@ -1060,7 +1060,7 @@ static void fbcon_init(struct vc_data *vc, int init)
 	struct fbcon_ops *ops;
 	struct vc_data **default_mode = vc->vc_display_fg;
 	struct vc_data *svc = *default_mode;
-	struct display *t, *p = &fb_display[vc->vc_num];
+	struct fbcon_display *t, *p = &fb_display[vc->vc_num];
 	int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
 	int cap, ret;
 
@@ -1203,7 +1203,7 @@ static void fbcon_init(struct vc_data *vc, int init)
 	ops->p = &fb_display[fg_console];
 }
 
-static void fbcon_free_font(struct display *p, bool freefont)
+static void fbcon_free_font(struct fbcon_display *p, bool freefont)
 {
 	if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
 		kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
@@ -1215,7 +1215,7 @@ static void set_vc_hi_font(struct vc_data *vc, bool set);
 
 static void fbcon_deinit(struct vc_data *vc)
 {
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	struct fb_info *info;
 	struct fbcon_ops *ops;
 	int idx;
@@ -1288,7 +1288,7 @@ static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
 	struct fbcon_ops *ops = info->fbcon_par;
 
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	u_int y_break;
 
 	if (fbcon_is_inactive(vc, info))
@@ -1324,7 +1324,7 @@ static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 			int count, int ypos, int xpos)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	struct fbcon_ops *ops = info->fbcon_par;
 
 	if (!fbcon_is_inactive(vc, info))
@@ -1388,7 +1388,7 @@ static int scrollback_current = 0;
 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 			   int unit)
 {
-	struct display *p, *t;
+	struct fbcon_display *p, *t;
 	struct vc_data **default_mode, *vc;
 	struct vc_data *svc;
 	struct fbcon_ops *ops = info->fbcon_par;
@@ -1457,7 +1457,7 @@ static __inline__ void ywrap_up(struct vc_data *vc, int count)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
 	struct fbcon_ops *ops = info->fbcon_par;
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	
 	p->yscroll += count;
 	if (p->yscroll >= p->vrows)	/* Deal with wrap */
@@ -1476,7 +1476,7 @@ static __inline__ void ywrap_down(struct vc_data *vc, int count)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
 	struct fbcon_ops *ops = info->fbcon_par;
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	
 	p->yscroll -= count;
 	if (p->yscroll < 0)	/* Deal with wrap */
@@ -1494,7 +1494,7 @@ static __inline__ void ywrap_down(struct vc_data *vc, int count)
 static __inline__ void ypan_up(struct vc_data *vc, int count)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	struct fbcon_ops *ops = info->fbcon_par;
 
 	p->yscroll += count;
@@ -1519,7 +1519,7 @@ static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
 	struct fbcon_ops *ops = info->fbcon_par;
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 
 	p->yscroll += count;
 
@@ -1542,7 +1542,7 @@ static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
 static __inline__ void ypan_down(struct vc_data *vc, int count)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	struct fbcon_ops *ops = info->fbcon_par;
 	
 	p->yscroll -= count;
@@ -1567,7 +1567,7 @@ static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
 	struct fbcon_ops *ops = info->fbcon_par;
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 
 	p->yscroll -= count;
 
@@ -1587,7 +1587,7 @@ static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
 	scrollback_current = 0;
 }
 
-static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
+static void fbcon_redraw_softback(struct vc_data *vc, struct fbcon_display *p,
 				  long delta)
 {
 	int count = vc->vc_rows;
@@ -1680,7 +1680,7 @@ static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
 	}
 }
 
-static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
+static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
 			      int line, int count, int dy)
 {
 	unsigned short *s = (unsigned short *)
@@ -1715,7 +1715,7 @@ static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
 }
 
 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
-			struct display *p, int line, int count, int ycount)
+			struct fbcon_display *p, int line, int count, int ycount)
 {
 	int offset = ycount * vc->vc_cols;
 	unsigned short *d = (unsigned short *)
@@ -1764,7 +1764,7 @@ static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
 	}
 }
 
-static void fbcon_redraw(struct vc_data *vc, struct display *p,
+static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p,
 			 int line, int count, int offset)
 {
 	unsigned short *d = (unsigned short *)
@@ -1848,7 +1848,7 @@ static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
 		enum con_scroll dir, unsigned int count)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
 
 	if (fbcon_is_inactive(vc, info))
@@ -2052,7 +2052,7 @@ static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 			int height, int width)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	
 	if (fbcon_is_inactive(vc, info))
 		return;
@@ -2071,7 +2071,7 @@ static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 			p->vrows - p->yscroll);
 }
 
-static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx, 
+static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
 			    int dy, int dx, int height, int width, u_int y_break)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
@@ -2113,7 +2113,7 @@ static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int s
 		   height, width);
 }
 
-static void updatescrollmode(struct display *p,
+static void updatescrollmode(struct fbcon_display *p,
 					struct fb_info *info,
 					struct vc_data *vc)
 {
@@ -2165,7 +2165,7 @@ static int fbcon_resize(struct vc_data *vc, unsigned int width,
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
 	struct fbcon_ops *ops = info->fbcon_par;
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	struct fb_var_screeninfo var = info->var;
 	int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
 
@@ -2210,7 +2210,7 @@ static int fbcon_switch(struct vc_data *vc)
 {
 	struct fb_info *info, *old_info = NULL;
 	struct fbcon_ops *ops;
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	struct fb_var_screeninfo var;
 	int i, ret, prev_console, charcnt = 256;
 
@@ -2553,7 +2553,7 @@ static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
 	struct fbcon_ops *ops = info->fbcon_par;
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	int resize;
 	int cnt;
 	char *old_data = NULL;
@@ -2601,7 +2601,7 @@ static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
 
 static int fbcon_copy_font(struct vc_data *vc, int con)
 {
-	struct display *od = &fb_display[con];
+	struct fbcon_display *od = &fb_display[con];
 	struct console_font *f = &vc->vc_font;
 
 	if (od->fontdata == f->data)
@@ -2826,7 +2826,7 @@ static void fbcon_scrolldelta(struct vc_data *vc, int lines)
 {
 	struct fb_info *info = registered_fb[con2fb_map[fg_console]];
 	struct fbcon_ops *ops = info->fbcon_par;
-	struct display *disp = &fb_display[fg_console];
+	struct fbcon_display *disp = &fb_display[fg_console];
 	int offset, limit, scrollback_old;
 
 	if (softback_top) {
@@ -2947,7 +2947,7 @@ static void fbcon_modechanged(struct fb_info *info)
 {
 	struct fbcon_ops *ops = info->fbcon_par;
 	struct vc_data *vc;
-	struct display *p;
+	struct fbcon_display *p;
 	int rows, cols;
 
 	if (!ops || ops->currcon < 0)
@@ -2987,7 +2987,7 @@ static void fbcon_set_all_vcs(struct fb_info *info)
 {
 	struct fbcon_ops *ops = info->fbcon_par;
 	struct vc_data *vc;
-	struct display *p;
+	struct fbcon_display *p;
 	int i, rows, cols, fg = -1;
 
 	if (!ops || ops->currcon < 0)
@@ -3022,7 +3022,7 @@ static int fbcon_mode_deleted(struct fb_info *info,
 			      struct fb_videomode *mode)
 {
 	struct fb_info *fb_info;
-	struct display *p;
+	struct fbcon_display *p;
 	int i, j, found = 0;
 
 	/* before deletion, ensure that mode is not in use */
@@ -3294,7 +3294,7 @@ static void fbcon_get_requirement(struct fb_info *info,
 				  struct fb_blit_caps *caps)
 {
 	struct vc_data *vc;
-	struct display *p;
+	struct fbcon_display *p;
 
 	if (caps->flags) {
 		int i, charcnt;
diff --git a/drivers/video/fbdev/core/fbcon.h b/drivers/video/fbdev/core/fbcon.h
index 21912a3ba32f..20dea853765f 100644
--- a/drivers/video/fbdev/core/fbcon.h
+++ b/drivers/video/fbdev/core/fbcon.h
@@ -25,7 +25,7 @@
     *    low-level frame buffer device
     */
 
-struct display {
+struct fbcon_display {
     /* Filled in by the low-level console driver */
     const u_char *fontdata;
     int userfont;                   /* != 0 if fontdata kmalloc()ed */
@@ -68,7 +68,7 @@ struct fbcon_ops {
 	struct fb_var_screeninfo var;  /* copy of the current fb_var_screeninfo */
 	struct timer_list cursor_timer; /* Cursor timer */
 	struct fb_cursor cursor_state;
-	struct display *p;
+	struct fbcon_display *p;
 	struct fb_info *info;
         int    currcon;	                /* Current VC. */
 	int    cur_blink_jiffies;
@@ -225,7 +225,7 @@ extern int  soft_cursor(struct fb_info *info, struct fb_cursor *cursor);
 #define FBCON_ATTRIBUTE_REVERSE   2
 #define FBCON_ATTRIBUTE_BOLD      4
 
-static inline int real_y(struct display *p, int ypos)
+static inline int real_y(struct fbcon_display *p, int ypos)
 {
 	int rows = p->vrows;
 
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 08/33] fbcon: s/struct display/struct fbcon_display/
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Greg Kroah-Hartman, Kees Cook, Prarit Bhargava,
	Konstantin Khorenko, Peter Rosin, Yisheng Xie

This was formerly used in fbdev drivers (not sure why, predates most
git history), but now it's entirely an fbcon internal thing. Give it a
more specific name.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Peter Rosin <peda@axentia.se>
Cc: Yisheng Xie <ysxie@foxmail.com>
---
 drivers/video/fbdev/core/fbcon.c | 74 ++++++++++++++++----------------
 drivers/video/fbdev/core/fbcon.h |  6 +--
 2 files changed, 40 insertions(+), 40 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 786f9aab55df..5424051c8e1a 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -93,7 +93,7 @@ enum {
 	FBCON_LOGO_DONTSHOW	= -3	/* do not show the logo */
 };
 
-static struct display fb_display[MAX_NR_CONSOLES];
+static struct fbcon_display fb_display[MAX_NR_CONSOLES];
 
 static signed char con2fb_map[MAX_NR_CONSOLES];
 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
@@ -185,11 +185,11 @@ static __inline__ void ywrap_up(struct vc_data *vc, int count);
 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 static __inline__ void ypan_up(struct vc_data *vc, int count);
 static __inline__ void ypan_down(struct vc_data *vc, int count);
-static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
+static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
 			    int dy, int dx, int height, int width, u_int y_break);
 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 			   int unit);
-static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
+static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
 			      int line, int count, int dy);
 static void fbcon_modechanged(struct fb_info *info);
 static void fbcon_set_all_vcs(struct fb_info *info);
@@ -220,7 +220,7 @@ static void fbcon_rotate(struct fb_info *info, u32 rotate)
 	fb_info = registered_fb[con2fb_map[ops->currcon]];
 
 	if (info = fb_info) {
-		struct display *p = &fb_display[ops->currcon];
+		struct fbcon_display *p = &fb_display[ops->currcon];
 
 		if (rotate < 4)
 			p->con_rotate = rotate;
@@ -235,7 +235,7 @@ static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 {
 	struct fbcon_ops *ops = info->fbcon_par;
 	struct vc_data *vc;
-	struct display *p;
+	struct fbcon_display *p;
 	int i;
 
 	if (!ops || ops->currcon < 0 || rotate > 3)
@@ -900,7 +900,7 @@ static int set_con2fb_map(int unit, int newidx, int user)
  *  Low Level Operations
  */
 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
-static int var_to_display(struct display *disp,
+static int var_to_display(struct fbcon_display *disp,
 			  struct fb_var_screeninfo *var,
 			  struct fb_info *info)
 {
@@ -925,7 +925,7 @@ static int var_to_display(struct display *disp,
 }
 
 static void display_to_var(struct fb_var_screeninfo *var,
-			   struct display *disp)
+			   struct fbcon_display *disp)
 {
 	fb_videomode_to_var(var, disp->mode);
 	var->xres_virtual = disp->xres_virtual;
@@ -946,7 +946,7 @@ static void display_to_var(struct fb_var_screeninfo *var,
 static const char *fbcon_startup(void)
 {
 	const char *display_desc = "frame buffer device";
-	struct display *p = &fb_display[fg_console];
+	struct fbcon_display *p = &fb_display[fg_console];
 	struct vc_data *vc = vc_cons[fg_console].d;
 	const struct font_desc *font = NULL;
 	struct module *owner;
@@ -1060,7 +1060,7 @@ static void fbcon_init(struct vc_data *vc, int init)
 	struct fbcon_ops *ops;
 	struct vc_data **default_mode = vc->vc_display_fg;
 	struct vc_data *svc = *default_mode;
-	struct display *t, *p = &fb_display[vc->vc_num];
+	struct fbcon_display *t, *p = &fb_display[vc->vc_num];
 	int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
 	int cap, ret;
 
@@ -1203,7 +1203,7 @@ static void fbcon_init(struct vc_data *vc, int init)
 	ops->p = &fb_display[fg_console];
 }
 
-static void fbcon_free_font(struct display *p, bool freefont)
+static void fbcon_free_font(struct fbcon_display *p, bool freefont)
 {
 	if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) = 0))
 		kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
@@ -1215,7 +1215,7 @@ static void set_vc_hi_font(struct vc_data *vc, bool set);
 
 static void fbcon_deinit(struct vc_data *vc)
 {
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	struct fb_info *info;
 	struct fbcon_ops *ops;
 	int idx;
@@ -1288,7 +1288,7 @@ static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
 	struct fbcon_ops *ops = info->fbcon_par;
 
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	u_int y_break;
 
 	if (fbcon_is_inactive(vc, info))
@@ -1324,7 +1324,7 @@ static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 			int count, int ypos, int xpos)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	struct fbcon_ops *ops = info->fbcon_par;
 
 	if (!fbcon_is_inactive(vc, info))
@@ -1388,7 +1388,7 @@ static int scrollback_current = 0;
 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 			   int unit)
 {
-	struct display *p, *t;
+	struct fbcon_display *p, *t;
 	struct vc_data **default_mode, *vc;
 	struct vc_data *svc;
 	struct fbcon_ops *ops = info->fbcon_par;
@@ -1457,7 +1457,7 @@ static __inline__ void ywrap_up(struct vc_data *vc, int count)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
 	struct fbcon_ops *ops = info->fbcon_par;
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	
 	p->yscroll += count;
 	if (p->yscroll >= p->vrows)	/* Deal with wrap */
@@ -1476,7 +1476,7 @@ static __inline__ void ywrap_down(struct vc_data *vc, int count)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
 	struct fbcon_ops *ops = info->fbcon_par;
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	
 	p->yscroll -= count;
 	if (p->yscroll < 0)	/* Deal with wrap */
@@ -1494,7 +1494,7 @@ static __inline__ void ywrap_down(struct vc_data *vc, int count)
 static __inline__ void ypan_up(struct vc_data *vc, int count)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	struct fbcon_ops *ops = info->fbcon_par;
 
 	p->yscroll += count;
@@ -1519,7 +1519,7 @@ static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
 	struct fbcon_ops *ops = info->fbcon_par;
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 
 	p->yscroll += count;
 
@@ -1542,7 +1542,7 @@ static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
 static __inline__ void ypan_down(struct vc_data *vc, int count)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	struct fbcon_ops *ops = info->fbcon_par;
 	
 	p->yscroll -= count;
@@ -1567,7 +1567,7 @@ static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
 	struct fbcon_ops *ops = info->fbcon_par;
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 
 	p->yscroll -= count;
 
@@ -1587,7 +1587,7 @@ static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
 	scrollback_current = 0;
 }
 
-static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
+static void fbcon_redraw_softback(struct vc_data *vc, struct fbcon_display *p,
 				  long delta)
 {
 	int count = vc->vc_rows;
@@ -1680,7 +1680,7 @@ static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
 	}
 }
 
-static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
+static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
 			      int line, int count, int dy)
 {
 	unsigned short *s = (unsigned short *)
@@ -1715,7 +1715,7 @@ static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
 }
 
 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
-			struct display *p, int line, int count, int ycount)
+			struct fbcon_display *p, int line, int count, int ycount)
 {
 	int offset = ycount * vc->vc_cols;
 	unsigned short *d = (unsigned short *)
@@ -1764,7 +1764,7 @@ static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
 	}
 }
 
-static void fbcon_redraw(struct vc_data *vc, struct display *p,
+static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p,
 			 int line, int count, int offset)
 {
 	unsigned short *d = (unsigned short *)
@@ -1848,7 +1848,7 @@ static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
 		enum con_scroll dir, unsigned int count)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
 
 	if (fbcon_is_inactive(vc, info))
@@ -2052,7 +2052,7 @@ static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 			int height, int width)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	
 	if (fbcon_is_inactive(vc, info))
 		return;
@@ -2071,7 +2071,7 @@ static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 			p->vrows - p->yscroll);
 }
 
-static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx, 
+static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
 			    int dy, int dx, int height, int width, u_int y_break)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
@@ -2113,7 +2113,7 @@ static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int s
 		   height, width);
 }
 
-static void updatescrollmode(struct display *p,
+static void updatescrollmode(struct fbcon_display *p,
 					struct fb_info *info,
 					struct vc_data *vc)
 {
@@ -2165,7 +2165,7 @@ static int fbcon_resize(struct vc_data *vc, unsigned int width,
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
 	struct fbcon_ops *ops = info->fbcon_par;
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	struct fb_var_screeninfo var = info->var;
 	int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
 
@@ -2210,7 +2210,7 @@ static int fbcon_switch(struct vc_data *vc)
 {
 	struct fb_info *info, *old_info = NULL;
 	struct fbcon_ops *ops;
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	struct fb_var_screeninfo var;
 	int i, ret, prev_console, charcnt = 256;
 
@@ -2553,7 +2553,7 @@ static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
 	struct fbcon_ops *ops = info->fbcon_par;
-	struct display *p = &fb_display[vc->vc_num];
+	struct fbcon_display *p = &fb_display[vc->vc_num];
 	int resize;
 	int cnt;
 	char *old_data = NULL;
@@ -2601,7 +2601,7 @@ static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
 
 static int fbcon_copy_font(struct vc_data *vc, int con)
 {
-	struct display *od = &fb_display[con];
+	struct fbcon_display *od = &fb_display[con];
 	struct console_font *f = &vc->vc_font;
 
 	if (od->fontdata = f->data)
@@ -2826,7 +2826,7 @@ static void fbcon_scrolldelta(struct vc_data *vc, int lines)
 {
 	struct fb_info *info = registered_fb[con2fb_map[fg_console]];
 	struct fbcon_ops *ops = info->fbcon_par;
-	struct display *disp = &fb_display[fg_console];
+	struct fbcon_display *disp = &fb_display[fg_console];
 	int offset, limit, scrollback_old;
 
 	if (softback_top) {
@@ -2947,7 +2947,7 @@ static void fbcon_modechanged(struct fb_info *info)
 {
 	struct fbcon_ops *ops = info->fbcon_par;
 	struct vc_data *vc;
-	struct display *p;
+	struct fbcon_display *p;
 	int rows, cols;
 
 	if (!ops || ops->currcon < 0)
@@ -2987,7 +2987,7 @@ static void fbcon_set_all_vcs(struct fb_info *info)
 {
 	struct fbcon_ops *ops = info->fbcon_par;
 	struct vc_data *vc;
-	struct display *p;
+	struct fbcon_display *p;
 	int i, rows, cols, fg = -1;
 
 	if (!ops || ops->currcon < 0)
@@ -3022,7 +3022,7 @@ static int fbcon_mode_deleted(struct fb_info *info,
 			      struct fb_videomode *mode)
 {
 	struct fb_info *fb_info;
-	struct display *p;
+	struct fbcon_display *p;
 	int i, j, found = 0;
 
 	/* before deletion, ensure that mode is not in use */
@@ -3294,7 +3294,7 @@ static void fbcon_get_requirement(struct fb_info *info,
 				  struct fb_blit_caps *caps)
 {
 	struct vc_data *vc;
-	struct display *p;
+	struct fbcon_display *p;
 
 	if (caps->flags) {
 		int i, charcnt;
diff --git a/drivers/video/fbdev/core/fbcon.h b/drivers/video/fbdev/core/fbcon.h
index 21912a3ba32f..20dea853765f 100644
--- a/drivers/video/fbdev/core/fbcon.h
+++ b/drivers/video/fbdev/core/fbcon.h
@@ -25,7 +25,7 @@
     *    low-level frame buffer device
     */
 
-struct display {
+struct fbcon_display {
     /* Filled in by the low-level console driver */
     const u_char *fontdata;
     int userfont;                   /* != 0 if fontdata kmalloc()ed */
@@ -68,7 +68,7 @@ struct fbcon_ops {
 	struct fb_var_screeninfo var;  /* copy of the current fb_var_screeninfo */
 	struct timer_list cursor_timer; /* Cursor timer */
 	struct fb_cursor cursor_state;
-	struct display *p;
+	struct fbcon_display *p;
 	struct fb_info *info;
         int    currcon;	                /* Current VC. */
 	int    cur_blink_jiffies;
@@ -225,7 +225,7 @@ extern int  soft_cursor(struct fb_info *info, struct fb_cursor *cursor);
 #define FBCON_ATTRIBUTE_REVERSE   2
 #define FBCON_ATTRIBUTE_BOLD      4
 
-static inline int real_y(struct display *p, int ypos)
+static inline int real_y(struct fbcon_display *p, int ypos)
 {
 	int rows = p->vrows;
 
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 09/33] fbcon: Remove fbcon_has_exited
  2019-05-28  9:02 ` Daniel Vetter
  (?)
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Sam Ravnborg, Maarten Lankhorst, Daniel Vetter, Hans de Goede,
	Noralf Trønnes, Yisheng Xie, Konstantin Khorenko,
	Prarit Bhargava, Kees Cook

This is unused code since

commit 6104c37094e729f3d4ce65797002112735d49cd1
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Tue Aug 1 17:32:07 2017 +0200

    fbcon: Make fbcon a built-time depency for fbdev

when fbcon was made a compile-time static dependency of fbdev. We
can't exit fbcon anymore without exiting fbdev first, which only works
if all fbdev drivers have unloaded already. Hence this is all dead
code.

v2: I missed that fbcon_exit is also called from con_deinit stuff, and
there fbcon_has_exited prevents double-cleanup. But we can fix that
by properly resetting con2fb_map[] to all -1, which is used everywhere
else to indicate "no fb_info allocate to this console". With that
change the double-cleanup (which resulted in a module refcount underflow,
among other things) is prevented.

Aside: con2fb_map is a signed char, so don't register more than 128 fb_info
or hilarity will ensue.

v3: CI showed me that I still didn't fully understand what's going on
here. The leaked references in con2fb_map have been used upon
rebinding the fb console in fbcon_init. It worked because fbdev
unregistering still cleaned out con2fb_map, and reset it to info_idx.
If the last fbdev driver unregistered, then it also reset info_idx,
and unregistered the fbcon driver.

Imo that's all a bit fragile, so let's keep the con2fb_map reset to
-1, and in fbcon_init pick info_idx if we're starting fresh. That
means unbinding and rebinding will cleanse the mapping, but why are
you doing that if you want to retain the mapping, so should be fine.

Also, I think info_idx == -1 is impossible in fbcon_init - we
unregister the fbcon in that case. So catch&warn about that.

v4: Drop unecessary assignment - I forgot to delete the first
assignment of info in fbcon_init.

Cc: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
---
 drivers/video/fbdev/core/fbcon.c | 41 ++++++--------------------------
 1 file changed, 7 insertions(+), 34 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 5424051c8e1a..e11bae2787e6 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -112,7 +112,6 @@ static int softback_lines;
 static int first_fb_vc;
 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 static int fbcon_is_default = 1; 
-static int fbcon_has_exited;
 static int primary_device = -1;
 static int fbcon_has_console_bind;
 
@@ -1050,13 +1049,12 @@ static const char *fbcon_startup(void)
 		info->var.bits_per_pixel);
 
 	fbcon_add_cursor_timer(info);
-	fbcon_has_exited = 0;
 	return display_desc;
 }
 
 static void fbcon_init(struct vc_data *vc, int init)
 {
-	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
+	struct fb_info *info;
 	struct fbcon_ops *ops;
 	struct vc_data **default_mode = vc->vc_display_fg;
 	struct vc_data *svc = *default_mode;
@@ -1064,9 +1062,13 @@ static void fbcon_init(struct vc_data *vc, int init)
 	int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
 	int cap, ret;
 
-	if (info_idx == -1 || info == NULL)
+	if (WARN_ON(info_idx == -1))
 	    return;
 
+	if (con2fb_map[vc->vc_num] == -1)
+		con2fb_map[vc->vc_num] = info_idx;
+
+	info = registered_fb[con2fb_map[vc->vc_num]];
 	cap = info->flags;
 
 	if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
@@ -3336,14 +3338,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	struct fb_blit_caps *caps;
 	int idx, ret = 0;
 
-	/*
-	 * ignore all events except driver registration and deregistration
-	 * if fbcon is not active
-	 */
-	if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
-				  action == FB_EVENT_FB_UNREGISTERED))
-		goto done;
-
 	switch(action) {
 	case FB_EVENT_SUSPEND:
 		fbcon_suspended(info);
@@ -3396,7 +3390,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 		fbcon_remap_all(idx);
 		break;
 	}
-done:
 	return ret;
 }
 
@@ -3443,9 +3436,6 @@ static ssize_t store_rotate(struct device *device,
 	int rotate, idx;
 	char **last = NULL;
 
-	if (fbcon_has_exited)
-		return count;
-
 	console_lock();
 	idx = con2fb_map[fg_console];
 
@@ -3468,9 +3458,6 @@ static ssize_t store_rotate_all(struct device *device,
 	int rotate, idx;
 	char **last = NULL;
 
-	if (fbcon_has_exited)
-		return count;
-
 	console_lock();
 	idx = con2fb_map[fg_console];
 
@@ -3491,9 +3478,6 @@ static ssize_t show_rotate(struct device *device,
 	struct fb_info *info;
 	int rotate = 0, idx;
 
-	if (fbcon_has_exited)
-		return 0;
-
 	console_lock();
 	idx = con2fb_map[fg_console];
 
@@ -3514,9 +3498,6 @@ static ssize_t show_cursor_blink(struct device *device,
 	struct fbcon_ops *ops;
 	int idx, blink = -1;
 
-	if (fbcon_has_exited)
-		return 0;
-
 	console_lock();
 	idx = con2fb_map[fg_console];
 
@@ -3543,9 +3524,6 @@ static ssize_t store_cursor_blink(struct device *device,
 	int blink, idx;
 	char **last = NULL;
 
-	if (fbcon_has_exited)
-		return count;
-
 	console_lock();
 	idx = con2fb_map[fg_console];
 
@@ -3668,9 +3646,6 @@ static void fbcon_exit(void)
 	struct fb_info *info;
 	int i, j, mapped;
 
-	if (fbcon_has_exited)
-		return;
-
 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
 	if (deferred_takeover) {
 		dummycon_unregister_output_notifier(&fbcon_output_nb);
@@ -3695,7 +3670,7 @@ static void fbcon_exit(void)
 		for (j = first_fb_vc; j <= last_fb_vc; j++) {
 			if (con2fb_map[j] == i) {
 				mapped = 1;
-				break;
+				con2fb_map[j] = -1;
 			}
 		}
 
@@ -3718,8 +3693,6 @@ static void fbcon_exit(void)
 				info->queue.func = NULL;
 		}
 	}
-
-	fbcon_has_exited = 1;
 }
 
 void __init fb_console_init(void)
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 09/33] fbcon: Remove fbcon_has_exited
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Prarit Bhargava, Daniel Thompson, Kees Cook,
	Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Yisheng Xie, Hans de Goede, Daniel Vetter, Sam Ravnborg,
	Konstantin Khorenko

This is unused code since

commit 6104c37094e729f3d4ce65797002112735d49cd1
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Tue Aug 1 17:32:07 2017 +0200

    fbcon: Make fbcon a built-time depency for fbdev

when fbcon was made a compile-time static dependency of fbdev. We
can't exit fbcon anymore without exiting fbdev first, which only works
if all fbdev drivers have unloaded already. Hence this is all dead
code.

v2: I missed that fbcon_exit is also called from con_deinit stuff, and
there fbcon_has_exited prevents double-cleanup. But we can fix that
by properly resetting con2fb_map[] to all -1, which is used everywhere
else to indicate "no fb_info allocate to this console". With that
change the double-cleanup (which resulted in a module refcount underflow,
among other things) is prevented.

Aside: con2fb_map is a signed char, so don't register more than 128 fb_info
or hilarity will ensue.

v3: CI showed me that I still didn't fully understand what's going on
here. The leaked references in con2fb_map have been used upon
rebinding the fb console in fbcon_init. It worked because fbdev
unregistering still cleaned out con2fb_map, and reset it to info_idx.
If the last fbdev driver unregistered, then it also reset info_idx,
and unregistered the fbcon driver.

Imo that's all a bit fragile, so let's keep the con2fb_map reset to
-1, and in fbcon_init pick info_idx if we're starting fresh. That
means unbinding and rebinding will cleanse the mapping, but why are
you doing that if you want to retain the mapping, so should be fine.

Also, I think info_idx = -1 is impossible in fbcon_init - we
unregister the fbcon in that case. So catch&warn about that.

v4: Drop unecessary assignment - I forgot to delete the first
assignment of info in fbcon_init.

Cc: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
---
 drivers/video/fbdev/core/fbcon.c | 41 ++++++--------------------------
 1 file changed, 7 insertions(+), 34 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 5424051c8e1a..e11bae2787e6 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -112,7 +112,6 @@ static int softback_lines;
 static int first_fb_vc;
 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 static int fbcon_is_default = 1; 
-static int fbcon_has_exited;
 static int primary_device = -1;
 static int fbcon_has_console_bind;
 
@@ -1050,13 +1049,12 @@ static const char *fbcon_startup(void)
 		info->var.bits_per_pixel);
 
 	fbcon_add_cursor_timer(info);
-	fbcon_has_exited = 0;
 	return display_desc;
 }
 
 static void fbcon_init(struct vc_data *vc, int init)
 {
-	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
+	struct fb_info *info;
 	struct fbcon_ops *ops;
 	struct vc_data **default_mode = vc->vc_display_fg;
 	struct vc_data *svc = *default_mode;
@@ -1064,9 +1062,13 @@ static void fbcon_init(struct vc_data *vc, int init)
 	int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
 	int cap, ret;
 
-	if (info_idx = -1 || info = NULL)
+	if (WARN_ON(info_idx = -1))
 	    return;
 
+	if (con2fb_map[vc->vc_num] = -1)
+		con2fb_map[vc->vc_num] = info_idx;
+
+	info = registered_fb[con2fb_map[vc->vc_num]];
 	cap = info->flags;
 
 	if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
@@ -3336,14 +3338,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	struct fb_blit_caps *caps;
 	int idx, ret = 0;
 
-	/*
-	 * ignore all events except driver registration and deregistration
-	 * if fbcon is not active
-	 */
-	if (fbcon_has_exited && !(action = FB_EVENT_FB_REGISTERED ||
-				  action = FB_EVENT_FB_UNREGISTERED))
-		goto done;
-
 	switch(action) {
 	case FB_EVENT_SUSPEND:
 		fbcon_suspended(info);
@@ -3396,7 +3390,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 		fbcon_remap_all(idx);
 		break;
 	}
-done:
 	return ret;
 }
 
@@ -3443,9 +3436,6 @@ static ssize_t store_rotate(struct device *device,
 	int rotate, idx;
 	char **last = NULL;
 
-	if (fbcon_has_exited)
-		return count;
-
 	console_lock();
 	idx = con2fb_map[fg_console];
 
@@ -3468,9 +3458,6 @@ static ssize_t store_rotate_all(struct device *device,
 	int rotate, idx;
 	char **last = NULL;
 
-	if (fbcon_has_exited)
-		return count;
-
 	console_lock();
 	idx = con2fb_map[fg_console];
 
@@ -3491,9 +3478,6 @@ static ssize_t show_rotate(struct device *device,
 	struct fb_info *info;
 	int rotate = 0, idx;
 
-	if (fbcon_has_exited)
-		return 0;
-
 	console_lock();
 	idx = con2fb_map[fg_console];
 
@@ -3514,9 +3498,6 @@ static ssize_t show_cursor_blink(struct device *device,
 	struct fbcon_ops *ops;
 	int idx, blink = -1;
 
-	if (fbcon_has_exited)
-		return 0;
-
 	console_lock();
 	idx = con2fb_map[fg_console];
 
@@ -3543,9 +3524,6 @@ static ssize_t store_cursor_blink(struct device *device,
 	int blink, idx;
 	char **last = NULL;
 
-	if (fbcon_has_exited)
-		return count;
-
 	console_lock();
 	idx = con2fb_map[fg_console];
 
@@ -3668,9 +3646,6 @@ static void fbcon_exit(void)
 	struct fb_info *info;
 	int i, j, mapped;
 
-	if (fbcon_has_exited)
-		return;
-
 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
 	if (deferred_takeover) {
 		dummycon_unregister_output_notifier(&fbcon_output_nb);
@@ -3695,7 +3670,7 @@ static void fbcon_exit(void)
 		for (j = first_fb_vc; j <= last_fb_vc; j++) {
 			if (con2fb_map[j] = i) {
 				mapped = 1;
-				break;
+				con2fb_map[j] = -1;
 			}
 		}
 
@@ -3718,8 +3693,6 @@ static void fbcon_exit(void)
 				info->queue.func = NULL;
 		}
 	}
-
-	fbcon_has_exited = 1;
 }
 
 void __init fb_console_init(void)
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 09/33] fbcon: Remove fbcon_has_exited
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Prarit Bhargava, Daniel Thompson, Kees Cook,
	Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Yisheng Xie, Hans de Goede, Daniel Vetter, Sam Ravnborg,
	Konstantin Khorenko

This is unused code since

commit 6104c37094e729f3d4ce65797002112735d49cd1
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Tue Aug 1 17:32:07 2017 +0200

    fbcon: Make fbcon a built-time depency for fbdev

when fbcon was made a compile-time static dependency of fbdev. We
can't exit fbcon anymore without exiting fbdev first, which only works
if all fbdev drivers have unloaded already. Hence this is all dead
code.

v2: I missed that fbcon_exit is also called from con_deinit stuff, and
there fbcon_has_exited prevents double-cleanup. But we can fix that
by properly resetting con2fb_map[] to all -1, which is used everywhere
else to indicate "no fb_info allocate to this console". With that
change the double-cleanup (which resulted in a module refcount underflow,
among other things) is prevented.

Aside: con2fb_map is a signed char, so don't register more than 128 fb_info
or hilarity will ensue.

v3: CI showed me that I still didn't fully understand what's going on
here. The leaked references in con2fb_map have been used upon
rebinding the fb console in fbcon_init. It worked because fbdev
unregistering still cleaned out con2fb_map, and reset it to info_idx.
If the last fbdev driver unregistered, then it also reset info_idx,
and unregistered the fbcon driver.

Imo that's all a bit fragile, so let's keep the con2fb_map reset to
-1, and in fbcon_init pick info_idx if we're starting fresh. That
means unbinding and rebinding will cleanse the mapping, but why are
you doing that if you want to retain the mapping, so should be fine.

Also, I think info_idx == -1 is impossible in fbcon_init - we
unregister the fbcon in that case. So catch&warn about that.

v4: Drop unecessary assignment - I forgot to delete the first
assignment of info in fbcon_init.

Cc: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
---
 drivers/video/fbdev/core/fbcon.c | 41 ++++++--------------------------
 1 file changed, 7 insertions(+), 34 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 5424051c8e1a..e11bae2787e6 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -112,7 +112,6 @@ static int softback_lines;
 static int first_fb_vc;
 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 static int fbcon_is_default = 1; 
-static int fbcon_has_exited;
 static int primary_device = -1;
 static int fbcon_has_console_bind;
 
@@ -1050,13 +1049,12 @@ static const char *fbcon_startup(void)
 		info->var.bits_per_pixel);
 
 	fbcon_add_cursor_timer(info);
-	fbcon_has_exited = 0;
 	return display_desc;
 }
 
 static void fbcon_init(struct vc_data *vc, int init)
 {
-	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
+	struct fb_info *info;
 	struct fbcon_ops *ops;
 	struct vc_data **default_mode = vc->vc_display_fg;
 	struct vc_data *svc = *default_mode;
@@ -1064,9 +1062,13 @@ static void fbcon_init(struct vc_data *vc, int init)
 	int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
 	int cap, ret;
 
-	if (info_idx == -1 || info == NULL)
+	if (WARN_ON(info_idx == -1))
 	    return;
 
+	if (con2fb_map[vc->vc_num] == -1)
+		con2fb_map[vc->vc_num] = info_idx;
+
+	info = registered_fb[con2fb_map[vc->vc_num]];
 	cap = info->flags;
 
 	if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
@@ -3336,14 +3338,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	struct fb_blit_caps *caps;
 	int idx, ret = 0;
 
-	/*
-	 * ignore all events except driver registration and deregistration
-	 * if fbcon is not active
-	 */
-	if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
-				  action == FB_EVENT_FB_UNREGISTERED))
-		goto done;
-
 	switch(action) {
 	case FB_EVENT_SUSPEND:
 		fbcon_suspended(info);
@@ -3396,7 +3390,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 		fbcon_remap_all(idx);
 		break;
 	}
-done:
 	return ret;
 }
 
@@ -3443,9 +3436,6 @@ static ssize_t store_rotate(struct device *device,
 	int rotate, idx;
 	char **last = NULL;
 
-	if (fbcon_has_exited)
-		return count;
-
 	console_lock();
 	idx = con2fb_map[fg_console];
 
@@ -3468,9 +3458,6 @@ static ssize_t store_rotate_all(struct device *device,
 	int rotate, idx;
 	char **last = NULL;
 
-	if (fbcon_has_exited)
-		return count;
-
 	console_lock();
 	idx = con2fb_map[fg_console];
 
@@ -3491,9 +3478,6 @@ static ssize_t show_rotate(struct device *device,
 	struct fb_info *info;
 	int rotate = 0, idx;
 
-	if (fbcon_has_exited)
-		return 0;
-
 	console_lock();
 	idx = con2fb_map[fg_console];
 
@@ -3514,9 +3498,6 @@ static ssize_t show_cursor_blink(struct device *device,
 	struct fbcon_ops *ops;
 	int idx, blink = -1;
 
-	if (fbcon_has_exited)
-		return 0;
-
 	console_lock();
 	idx = con2fb_map[fg_console];
 
@@ -3543,9 +3524,6 @@ static ssize_t store_cursor_blink(struct device *device,
 	int blink, idx;
 	char **last = NULL;
 
-	if (fbcon_has_exited)
-		return count;
-
 	console_lock();
 	idx = con2fb_map[fg_console];
 
@@ -3668,9 +3646,6 @@ static void fbcon_exit(void)
 	struct fb_info *info;
 	int i, j, mapped;
 
-	if (fbcon_has_exited)
-		return;
-
 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
 	if (deferred_takeover) {
 		dummycon_unregister_output_notifier(&fbcon_output_nb);
@@ -3695,7 +3670,7 @@ static void fbcon_exit(void)
 		for (j = first_fb_vc; j <= last_fb_vc; j++) {
 			if (con2fb_map[j] == i) {
 				mapped = 1;
-				break;
+				con2fb_map[j] = -1;
 			}
 		}
 
@@ -3718,8 +3693,6 @@ static void fbcon_exit(void)
 				info->queue.func = NULL;
 		}
 	}
-
-	fbcon_has_exited = 1;
 }
 
 void __init fb_console_init(void)
-- 
2.20.1

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 10/33] fbcon: call fbcon_fb_(un)registered directly
  2019-05-28  9:02 ` Daniel Vetter
  (?)
  (?)
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Greg Kroah-Hartman, Noralf Trønnes, Yisheng Xie,
	Peter Rosin, Michał Mirosław, Thomas Zimmermann,
	Mikulas Patocka, Daniel Mack, Haojian Zhuang, Robert Jarzmik,
	Konstantin Khorenko, Prarit Bhargava, Gerd Hoffmann,
	Steve Sakoman, Steve Sakoman, linux-arm-kernel

With

commit 6104c37094e729f3d4ce65797002112735d49cd1
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Tue Aug 1 17:32:07 2017 +0200

    fbcon: Make fbcon a built-time depency for fbdev

we have a static dependency between fbcon and fbdev, and we can
replace the indirection through the notifier chain with a function
call.

v2: Sam Ravnborg noticed that mach-pxa/am200epd.c has a notifier too,
and listens to this.

...

Looking at the code it seems to wait for some fb to show up, so that
it can get the framebuffer base address from the fb_info struct. I
suspect his is some firmware fbdev. Then it uses that information to
let the real fbdev driver (metronomefb.c by the looks) get at the
framebuffer memory.

This doesn't looke like it's easy to fix (except by deleting the
entire thing, seems untouched since 2008, we might be able to get away
with that), so let's just stuff a few #ifdef into fb.h and fbmem.c and
cry over them for a bit.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: Peter Rosin <peda@axentia.se>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: linux-fbdev@vger.kernel.org
Cc: Daniel Mack <daniel@zonque.org>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Steve Sakoman <sakoman@gmail.com>
Cc: Steve Sakoman <steve@sakoman.com>
Cc: linux-arm-kernel@lists.infradead.org
---
 arch/arm/mach-pxa/am200epd.c     | 13 +++++++++++--
 drivers/video/fbdev/core/fbcon.c | 14 +++-----------
 drivers/video/fbdev/core/fbmem.c | 24 +++++++++++++++++-------
 include/linux/fb.h               |  7 +++++--
 include/linux/fbcon.h            |  4 ++++
 5 files changed, 40 insertions(+), 22 deletions(-)

diff --git a/arch/arm/mach-pxa/am200epd.c b/arch/arm/mach-pxa/am200epd.c
index 50e18ed37fa6..cac0bb09db14 100644
--- a/arch/arm/mach-pxa/am200epd.c
+++ b/arch/arm/mach-pxa/am200epd.c
@@ -347,8 +347,17 @@ int __init am200_init(void)
 {
 	int ret;
 
-	/* before anything else, we request notification for any fb
-	 * creation events */
+	/*
+	 * Before anything else, we request notification for any fb
+	 * creation events.
+	 *
+	 * FIXME: This is terrible and needs to be nuked. The notifier is used
+	 * to get at the fb base address from the boot splash fb driver, which
+	 * is then passed to metronomefb. Instaed of metronomfb or this board
+	 * support file here figuring this out on their own.
+	 *
+	 * See also the #ifdef in fbmem.c.
+	 */
 	fb_register_client(&am200_fb_notif);
 
 	pxa2xx_mfp_config(ARRAY_AND_SIZE(am200_pin_config));
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index e11bae2787e6..5a9fe0c0dd3c 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3119,14 +3119,14 @@ static int fbcon_fb_unbind(int idx)
 }
 
 /* called with console_lock held */
-static int fbcon_fb_unregistered(struct fb_info *info)
+void fbcon_fb_unregistered(struct fb_info *info)
 {
 	int i, idx;
 
 	WARN_CONSOLE_UNLOCKED();
 
 	if (deferred_takeover)
-		return 0;
+		return;
 
 	idx = info->node;
 	for (i = first_fb_vc; i <= last_fb_vc; i++) {
@@ -3155,8 +3155,6 @@ static int fbcon_fb_unregistered(struct fb_info *info)
 
 	if (!num_registered_fb)
 		do_unregister_con_driver(&fb_con);
-
-	return 0;
 }
 
 /* called with console_lock held */
@@ -3215,7 +3213,7 @@ static inline void fbcon_select_primary(struct fb_info *info)
 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
 
 /* called with console_lock held */
-static int fbcon_fb_registered(struct fb_info *info)
+int fbcon_fb_registered(struct fb_info *info)
 {
 	int ret = 0, i, idx;
 
@@ -3359,12 +3357,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 		idx = info->node;
 		ret = fbcon_fb_unbind(idx);
 		break;
-	case FB_EVENT_FB_REGISTERED:
-		ret = fbcon_fb_registered(info);
-		break;
-	case FB_EVENT_FB_UNREGISTERED:
-		ret = fbcon_fb_unregistered(info);
-		break;
 	case FB_EVENT_SET_CONSOLE_MAP:
 		/* called with console lock held */
 		con2fb = event->data;
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 8ba674ffb3c9..bed7698ad18a 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1660,7 +1660,6 @@ MODULE_PARM_DESC(lockless_register_fb,
 static int do_register_framebuffer(struct fb_info *fb_info)
 {
 	int i, ret;
-	struct fb_event event;
 	struct fb_videomode mode;
 
 	if (fb_check_foreignness(fb_info))
@@ -1723,7 +1722,14 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 	fb_add_videomode(&mode, &fb_info->modelist);
 	registered_fb[i] = fb_info;
 
-	event.info = fb_info;
+#ifdef CONFIG_GUMSTIX_AM200EPD
+	{
+		struct fb_event event;
+		event.info = fb_info;
+		fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
+	}
+#endif
+
 	if (!lockless_register_fb)
 		console_lock();
 	else
@@ -1732,9 +1738,8 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 		ret = -ENODEV;
 		goto unlock_console;
 	}
-	ret = 0;
 
-	fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
+	ret = fbcon_fb_registered(fb_info);
 	unlock_fb_info(fb_info);
 unlock_console:
 	if (!lockless_register_fb)
@@ -1771,7 +1776,6 @@ static int __unlink_framebuffer(struct fb_info *fb_info);
 
 static int do_unregister_framebuffer(struct fb_info *fb_info)
 {
-	struct fb_event event;
 	int ret;
 
 	ret = unbind_console(fb_info);
@@ -1789,9 +1793,15 @@ static int do_unregister_framebuffer(struct fb_info *fb_info)
 	registered_fb[fb_info->node] = NULL;
 	num_registered_fb--;
 	fb_cleanup_device(fb_info);
-	event.info = fb_info;
+#ifdef CONFIG_GUMSTIX_AM200EPD
+	{
+		struct fb_event event;
+		event.info = fb_info;
+		fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
+	}
+#endif
 	console_lock();
-	fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
+	fbcon_fb_unregistered(fb_info);
 	console_unlock();
 
 	/* this may free fb info */
diff --git a/include/linux/fb.h b/include/linux/fb.h
index f52ef0ad6781..288175fafaf6 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -136,10 +136,13 @@ struct fb_cursor_user {
 #define FB_EVENT_RESUME			0x03
 /*      An entry from the modelist was removed */
 #define FB_EVENT_MODE_DELETE            0x04
-/*      A driver registered itself */
+
+#ifdef CONFIG_GUMSTIX_AM200EPD
+/* only used by mach-pxa/am200epd.c */
 #define FB_EVENT_FB_REGISTERED          0x05
-/*      A driver unregistered itself */
 #define FB_EVENT_FB_UNREGISTERED        0x06
+#endif
+
 /*      CONSOLE-SPECIFIC: get console to framebuffer mapping */
 #define FB_EVENT_GET_CONSOLE_MAP        0x07
 /*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index f68a7db14165..94a71e9e1257 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -4,9 +4,13 @@
 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
 void __init fb_console_init(void);
 void __exit fb_console_exit(void);
+int fbcon_fb_registered(struct fb_info *info);
+void fbcon_fb_unregistered(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
+static inline int fbcon_fb_registered(struct fb_info *info) { return 0; }
+static inline void fbcon_fb_unregistered(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 10/33] fbcon: call fbcon_fb_(un)registered directly
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Greg Kroah-Hartman, Noralf Trønnes, Yisheng Xie,
	Peter Rosin, Michał Mirosław, Thomas Zimmermann,
	Mikulas Patocka

With

commit 6104c37094e729f3d4ce65797002112735d49cd1
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Tue Aug 1 17:32:07 2017 +0200

    fbcon: Make fbcon a built-time depency for fbdev

we have a static dependency between fbcon and fbdev, and we can
replace the indirection through the notifier chain with a function
call.

v2: Sam Ravnborg noticed that mach-pxa/am200epd.c has a notifier too,
and listens to this.

...

Looking at the code it seems to wait for some fb to show up, so that
it can get the framebuffer base address from the fb_info struct. I
suspect his is some firmware fbdev. Then it uses that information to
let the real fbdev driver (metronomefb.c by the looks) get at the
framebuffer memory.

This doesn't looke like it's easy to fix (except by deleting the
entire thing, seems untouched since 2008, we might be able to get away
with that), so let's just stuff a few #ifdef into fb.h and fbmem.c and
cry over them for a bit.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: Peter Rosin <peda@axentia.se>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: linux-fbdev@vger.kernel.org
Cc: Daniel Mack <daniel@zonque.org>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Steve Sakoman <sakoman@gmail.com>
Cc: Steve Sakoman <steve@sakoman.com>
Cc: linux-arm-kernel@lists.infradead.org
---
 arch/arm/mach-pxa/am200epd.c     | 13 +++++++++++--
 drivers/video/fbdev/core/fbcon.c | 14 +++-----------
 drivers/video/fbdev/core/fbmem.c | 24 +++++++++++++++++-------
 include/linux/fb.h               |  7 +++++--
 include/linux/fbcon.h            |  4 ++++
 5 files changed, 40 insertions(+), 22 deletions(-)

diff --git a/arch/arm/mach-pxa/am200epd.c b/arch/arm/mach-pxa/am200epd.c
index 50e18ed37fa6..cac0bb09db14 100644
--- a/arch/arm/mach-pxa/am200epd.c
+++ b/arch/arm/mach-pxa/am200epd.c
@@ -347,8 +347,17 @@ int __init am200_init(void)
 {
 	int ret;
 
-	/* before anything else, we request notification for any fb
-	 * creation events */
+	/*
+	 * Before anything else, we request notification for any fb
+	 * creation events.
+	 *
+	 * FIXME: This is terrible and needs to be nuked. The notifier is used
+	 * to get at the fb base address from the boot splash fb driver, which
+	 * is then passed to metronomefb. Instaed of metronomfb or this board
+	 * support file here figuring this out on their own.
+	 *
+	 * See also the #ifdef in fbmem.c.
+	 */
 	fb_register_client(&am200_fb_notif);
 
 	pxa2xx_mfp_config(ARRAY_AND_SIZE(am200_pin_config));
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index e11bae2787e6..5a9fe0c0dd3c 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3119,14 +3119,14 @@ static int fbcon_fb_unbind(int idx)
 }
 
 /* called with console_lock held */
-static int fbcon_fb_unregistered(struct fb_info *info)
+void fbcon_fb_unregistered(struct fb_info *info)
 {
 	int i, idx;
 
 	WARN_CONSOLE_UNLOCKED();
 
 	if (deferred_takeover)
-		return 0;
+		return;
 
 	idx = info->node;
 	for (i = first_fb_vc; i <= last_fb_vc; i++) {
@@ -3155,8 +3155,6 @@ static int fbcon_fb_unregistered(struct fb_info *info)
 
 	if (!num_registered_fb)
 		do_unregister_con_driver(&fb_con);
-
-	return 0;
 }
 
 /* called with console_lock held */
@@ -3215,7 +3213,7 @@ static inline void fbcon_select_primary(struct fb_info *info)
 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
 
 /* called with console_lock held */
-static int fbcon_fb_registered(struct fb_info *info)
+int fbcon_fb_registered(struct fb_info *info)
 {
 	int ret = 0, i, idx;
 
@@ -3359,12 +3357,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 		idx = info->node;
 		ret = fbcon_fb_unbind(idx);
 		break;
-	case FB_EVENT_FB_REGISTERED:
-		ret = fbcon_fb_registered(info);
-		break;
-	case FB_EVENT_FB_UNREGISTERED:
-		ret = fbcon_fb_unregistered(info);
-		break;
 	case FB_EVENT_SET_CONSOLE_MAP:
 		/* called with console lock held */
 		con2fb = event->data;
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 8ba674ffb3c9..bed7698ad18a 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1660,7 +1660,6 @@ MODULE_PARM_DESC(lockless_register_fb,
 static int do_register_framebuffer(struct fb_info *fb_info)
 {
 	int i, ret;
-	struct fb_event event;
 	struct fb_videomode mode;
 
 	if (fb_check_foreignness(fb_info))
@@ -1723,7 +1722,14 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 	fb_add_videomode(&mode, &fb_info->modelist);
 	registered_fb[i] = fb_info;
 
-	event.info = fb_info;
+#ifdef CONFIG_GUMSTIX_AM200EPD
+	{
+		struct fb_event event;
+		event.info = fb_info;
+		fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
+	}
+#endif
+
 	if (!lockless_register_fb)
 		console_lock();
 	else
@@ -1732,9 +1738,8 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 		ret = -ENODEV;
 		goto unlock_console;
 	}
-	ret = 0;
 
-	fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
+	ret = fbcon_fb_registered(fb_info);
 	unlock_fb_info(fb_info);
 unlock_console:
 	if (!lockless_register_fb)
@@ -1771,7 +1776,6 @@ static int __unlink_framebuffer(struct fb_info *fb_info);
 
 static int do_unregister_framebuffer(struct fb_info *fb_info)
 {
-	struct fb_event event;
 	int ret;
 
 	ret = unbind_console(fb_info);
@@ -1789,9 +1793,15 @@ static int do_unregister_framebuffer(struct fb_info *fb_info)
 	registered_fb[fb_info->node] = NULL;
 	num_registered_fb--;
 	fb_cleanup_device(fb_info);
-	event.info = fb_info;
+#ifdef CONFIG_GUMSTIX_AM200EPD
+	{
+		struct fb_event event;
+		event.info = fb_info;
+		fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
+	}
+#endif
 	console_lock();
-	fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
+	fbcon_fb_unregistered(fb_info);
 	console_unlock();
 
 	/* this may free fb info */
diff --git a/include/linux/fb.h b/include/linux/fb.h
index f52ef0ad6781..288175fafaf6 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -136,10 +136,13 @@ struct fb_cursor_user {
 #define FB_EVENT_RESUME			0x03
 /*      An entry from the modelist was removed */
 #define FB_EVENT_MODE_DELETE            0x04
-/*      A driver registered itself */
+
+#ifdef CONFIG_GUMSTIX_AM200EPD
+/* only used by mach-pxa/am200epd.c */
 #define FB_EVENT_FB_REGISTERED          0x05
-/*      A driver unregistered itself */
 #define FB_EVENT_FB_UNREGISTERED        0x06
+#endif
+
 /*      CONSOLE-SPECIFIC: get console to framebuffer mapping */
 #define FB_EVENT_GET_CONSOLE_MAP        0x07
 /*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index f68a7db14165..94a71e9e1257 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -4,9 +4,13 @@
 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
 void __init fb_console_init(void);
 void __exit fb_console_exit(void);
+int fbcon_fb_registered(struct fb_info *info);
+void fbcon_fb_unregistered(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
+static inline int fbcon_fb_registered(struct fb_info *info) { return 0; }
+static inline void fbcon_fb_unregistered(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 10/33] fbcon: call fbcon_fb_(un)registered directly
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: linux-fbdev, Daniel Vetter, DRI Development, Gerd Hoffmann,
	Daniel Vetter, Robert Jarzmik, Konstantin Khorenko,
	Steve Sakoman, Prarit Bhargava, Daniel Thompson, Sam Ravnborg,
	Steve Sakoman, Bartlomiej Zolnierkiewicz,
	Intel Graphics Development, Maarten Lankhorst, Haojian Zhuang,
	Michał Mirosław, Hans de Goede, Mikulas Patocka,
	linux-arm-kernel, Greg Kroah-Hartman, Yisheng Xie,
	Noralf Trønnes, Thomas Zimmermann, Peter Rosin, Daniel Mack

With

commit 6104c37094e729f3d4ce65797002112735d49cd1
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Tue Aug 1 17:32:07 2017 +0200

    fbcon: Make fbcon a built-time depency for fbdev

we have a static dependency between fbcon and fbdev, and we can
replace the indirection through the notifier chain with a function
call.

v2: Sam Ravnborg noticed that mach-pxa/am200epd.c has a notifier too,
and listens to this.

...

Looking at the code it seems to wait for some fb to show up, so that
it can get the framebuffer base address from the fb_info struct. I
suspect his is some firmware fbdev. Then it uses that information to
let the real fbdev driver (metronomefb.c by the looks) get at the
framebuffer memory.

This doesn't looke like it's easy to fix (except by deleting the
entire thing, seems untouched since 2008, we might be able to get away
with that), so let's just stuff a few #ifdef into fb.h and fbmem.c and
cry over them for a bit.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: Peter Rosin <peda@axentia.se>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: linux-fbdev@vger.kernel.org
Cc: Daniel Mack <daniel@zonque.org>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Steve Sakoman <sakoman@gmail.com>
Cc: Steve Sakoman <steve@sakoman.com>
Cc: linux-arm-kernel@lists.infradead.org
---
 arch/arm/mach-pxa/am200epd.c     | 13 +++++++++++--
 drivers/video/fbdev/core/fbcon.c | 14 +++-----------
 drivers/video/fbdev/core/fbmem.c | 24 +++++++++++++++++-------
 include/linux/fb.h               |  7 +++++--
 include/linux/fbcon.h            |  4 ++++
 5 files changed, 40 insertions(+), 22 deletions(-)

diff --git a/arch/arm/mach-pxa/am200epd.c b/arch/arm/mach-pxa/am200epd.c
index 50e18ed37fa6..cac0bb09db14 100644
--- a/arch/arm/mach-pxa/am200epd.c
+++ b/arch/arm/mach-pxa/am200epd.c
@@ -347,8 +347,17 @@ int __init am200_init(void)
 {
 	int ret;
 
-	/* before anything else, we request notification for any fb
-	 * creation events */
+	/*
+	 * Before anything else, we request notification for any fb
+	 * creation events.
+	 *
+	 * FIXME: This is terrible and needs to be nuked. The notifier is used
+	 * to get at the fb base address from the boot splash fb driver, which
+	 * is then passed to metronomefb. Instaed of metronomfb or this board
+	 * support file here figuring this out on their own.
+	 *
+	 * See also the #ifdef in fbmem.c.
+	 */
 	fb_register_client(&am200_fb_notif);
 
 	pxa2xx_mfp_config(ARRAY_AND_SIZE(am200_pin_config));
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index e11bae2787e6..5a9fe0c0dd3c 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3119,14 +3119,14 @@ static int fbcon_fb_unbind(int idx)
 }
 
 /* called with console_lock held */
-static int fbcon_fb_unregistered(struct fb_info *info)
+void fbcon_fb_unregistered(struct fb_info *info)
 {
 	int i, idx;
 
 	WARN_CONSOLE_UNLOCKED();
 
 	if (deferred_takeover)
-		return 0;
+		return;
 
 	idx = info->node;
 	for (i = first_fb_vc; i <= last_fb_vc; i++) {
@@ -3155,8 +3155,6 @@ static int fbcon_fb_unregistered(struct fb_info *info)
 
 	if (!num_registered_fb)
 		do_unregister_con_driver(&fb_con);
-
-	return 0;
 }
 
 /* called with console_lock held */
@@ -3215,7 +3213,7 @@ static inline void fbcon_select_primary(struct fb_info *info)
 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
 
 /* called with console_lock held */
-static int fbcon_fb_registered(struct fb_info *info)
+int fbcon_fb_registered(struct fb_info *info)
 {
 	int ret = 0, i, idx;
 
@@ -3359,12 +3357,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 		idx = info->node;
 		ret = fbcon_fb_unbind(idx);
 		break;
-	case FB_EVENT_FB_REGISTERED:
-		ret = fbcon_fb_registered(info);
-		break;
-	case FB_EVENT_FB_UNREGISTERED:
-		ret = fbcon_fb_unregistered(info);
-		break;
 	case FB_EVENT_SET_CONSOLE_MAP:
 		/* called with console lock held */
 		con2fb = event->data;
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 8ba674ffb3c9..bed7698ad18a 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1660,7 +1660,6 @@ MODULE_PARM_DESC(lockless_register_fb,
 static int do_register_framebuffer(struct fb_info *fb_info)
 {
 	int i, ret;
-	struct fb_event event;
 	struct fb_videomode mode;
 
 	if (fb_check_foreignness(fb_info))
@@ -1723,7 +1722,14 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 	fb_add_videomode(&mode, &fb_info->modelist);
 	registered_fb[i] = fb_info;
 
-	event.info = fb_info;
+#ifdef CONFIG_GUMSTIX_AM200EPD
+	{
+		struct fb_event event;
+		event.info = fb_info;
+		fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
+	}
+#endif
+
 	if (!lockless_register_fb)
 		console_lock();
 	else
@@ -1732,9 +1738,8 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 		ret = -ENODEV;
 		goto unlock_console;
 	}
-	ret = 0;
 
-	fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
+	ret = fbcon_fb_registered(fb_info);
 	unlock_fb_info(fb_info);
 unlock_console:
 	if (!lockless_register_fb)
@@ -1771,7 +1776,6 @@ static int __unlink_framebuffer(struct fb_info *fb_info);
 
 static int do_unregister_framebuffer(struct fb_info *fb_info)
 {
-	struct fb_event event;
 	int ret;
 
 	ret = unbind_console(fb_info);
@@ -1789,9 +1793,15 @@ static int do_unregister_framebuffer(struct fb_info *fb_info)
 	registered_fb[fb_info->node] = NULL;
 	num_registered_fb--;
 	fb_cleanup_device(fb_info);
-	event.info = fb_info;
+#ifdef CONFIG_GUMSTIX_AM200EPD
+	{
+		struct fb_event event;
+		event.info = fb_info;
+		fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
+	}
+#endif
 	console_lock();
-	fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
+	fbcon_fb_unregistered(fb_info);
 	console_unlock();
 
 	/* this may free fb info */
diff --git a/include/linux/fb.h b/include/linux/fb.h
index f52ef0ad6781..288175fafaf6 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -136,10 +136,13 @@ struct fb_cursor_user {
 #define FB_EVENT_RESUME			0x03
 /*      An entry from the modelist was removed */
 #define FB_EVENT_MODE_DELETE            0x04
-/*      A driver registered itself */
+
+#ifdef CONFIG_GUMSTIX_AM200EPD
+/* only used by mach-pxa/am200epd.c */
 #define FB_EVENT_FB_REGISTERED          0x05
-/*      A driver unregistered itself */
 #define FB_EVENT_FB_UNREGISTERED        0x06
+#endif
+
 /*      CONSOLE-SPECIFIC: get console to framebuffer mapping */
 #define FB_EVENT_GET_CONSOLE_MAP        0x07
 /*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index f68a7db14165..94a71e9e1257 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -4,9 +4,13 @@
 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
 void __init fb_console_init(void);
 void __exit fb_console_exit(void);
+int fbcon_fb_registered(struct fb_info *info);
+void fbcon_fb_unregistered(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
+static inline int fbcon_fb_registered(struct fb_info *info) { return 0; }
+static inline void fbcon_fb_unregistered(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 10/33] fbcon: call fbcon_fb_(un)registered directly
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Greg Kroah-Hartman, Noralf Trønnes, Yisheng Xie,
	Peter Rosin, Michał Mirosław, Thomas Zimmermann,
	Mikulas Patocka

With

commit 6104c37094e729f3d4ce65797002112735d49cd1
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Tue Aug 1 17:32:07 2017 +0200

    fbcon: Make fbcon a built-time depency for fbdev

we have a static dependency between fbcon and fbdev, and we can
replace the indirection through the notifier chain with a function
call.

v2: Sam Ravnborg noticed that mach-pxa/am200epd.c has a notifier too,
and listens to this.

...

Looking at the code it seems to wait for some fb to show up, so that
it can get the framebuffer base address from the fb_info struct. I
suspect his is some firmware fbdev. Then it uses that information to
let the real fbdev driver (metronomefb.c by the looks) get at the
framebuffer memory.

This doesn't looke like it's easy to fix (except by deleting the
entire thing, seems untouched since 2008, we might be able to get away
with that), so let's just stuff a few #ifdef into fb.h and fbmem.c and
cry over them for a bit.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: Peter Rosin <peda@axentia.se>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: linux-fbdev@vger.kernel.org
Cc: Daniel Mack <daniel@zonque.org>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Steve Sakoman <sakoman@gmail.com>
Cc: Steve Sakoman <steve@sakoman.com>
Cc: linux-arm-kernel@lists.infradead.org
---
 arch/arm/mach-pxa/am200epd.c     | 13 +++++++++++--
 drivers/video/fbdev/core/fbcon.c | 14 +++-----------
 drivers/video/fbdev/core/fbmem.c | 24 +++++++++++++++++-------
 include/linux/fb.h               |  7 +++++--
 include/linux/fbcon.h            |  4 ++++
 5 files changed, 40 insertions(+), 22 deletions(-)

diff --git a/arch/arm/mach-pxa/am200epd.c b/arch/arm/mach-pxa/am200epd.c
index 50e18ed37fa6..cac0bb09db14 100644
--- a/arch/arm/mach-pxa/am200epd.c
+++ b/arch/arm/mach-pxa/am200epd.c
@@ -347,8 +347,17 @@ int __init am200_init(void)
 {
 	int ret;
 
-	/* before anything else, we request notification for any fb
-	 * creation events */
+	/*
+	 * Before anything else, we request notification for any fb
+	 * creation events.
+	 *
+	 * FIXME: This is terrible and needs to be nuked. The notifier is used
+	 * to get at the fb base address from the boot splash fb driver, which
+	 * is then passed to metronomefb. Instaed of metronomfb or this board
+	 * support file here figuring this out on their own.
+	 *
+	 * See also the #ifdef in fbmem.c.
+	 */
 	fb_register_client(&am200_fb_notif);
 
 	pxa2xx_mfp_config(ARRAY_AND_SIZE(am200_pin_config));
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index e11bae2787e6..5a9fe0c0dd3c 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3119,14 +3119,14 @@ static int fbcon_fb_unbind(int idx)
 }
 
 /* called with console_lock held */
-static int fbcon_fb_unregistered(struct fb_info *info)
+void fbcon_fb_unregistered(struct fb_info *info)
 {
 	int i, idx;
 
 	WARN_CONSOLE_UNLOCKED();
 
 	if (deferred_takeover)
-		return 0;
+		return;
 
 	idx = info->node;
 	for (i = first_fb_vc; i <= last_fb_vc; i++) {
@@ -3155,8 +3155,6 @@ static int fbcon_fb_unregistered(struct fb_info *info)
 
 	if (!num_registered_fb)
 		do_unregister_con_driver(&fb_con);
-
-	return 0;
 }
 
 /* called with console_lock held */
@@ -3215,7 +3213,7 @@ static inline void fbcon_select_primary(struct fb_info *info)
 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
 
 /* called with console_lock held */
-static int fbcon_fb_registered(struct fb_info *info)
+int fbcon_fb_registered(struct fb_info *info)
 {
 	int ret = 0, i, idx;
 
@@ -3359,12 +3357,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 		idx = info->node;
 		ret = fbcon_fb_unbind(idx);
 		break;
-	case FB_EVENT_FB_REGISTERED:
-		ret = fbcon_fb_registered(info);
-		break;
-	case FB_EVENT_FB_UNREGISTERED:
-		ret = fbcon_fb_unregistered(info);
-		break;
 	case FB_EVENT_SET_CONSOLE_MAP:
 		/* called with console lock held */
 		con2fb = event->data;
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 8ba674ffb3c9..bed7698ad18a 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1660,7 +1660,6 @@ MODULE_PARM_DESC(lockless_register_fb,
 static int do_register_framebuffer(struct fb_info *fb_info)
 {
 	int i, ret;
-	struct fb_event event;
 	struct fb_videomode mode;
 
 	if (fb_check_foreignness(fb_info))
@@ -1723,7 +1722,14 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 	fb_add_videomode(&mode, &fb_info->modelist);
 	registered_fb[i] = fb_info;
 
-	event.info = fb_info;
+#ifdef CONFIG_GUMSTIX_AM200EPD
+	{
+		struct fb_event event;
+		event.info = fb_info;
+		fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
+	}
+#endif
+
 	if (!lockless_register_fb)
 		console_lock();
 	else
@@ -1732,9 +1738,8 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 		ret = -ENODEV;
 		goto unlock_console;
 	}
-	ret = 0;
 
-	fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
+	ret = fbcon_fb_registered(fb_info);
 	unlock_fb_info(fb_info);
 unlock_console:
 	if (!lockless_register_fb)
@@ -1771,7 +1776,6 @@ static int __unlink_framebuffer(struct fb_info *fb_info);
 
 static int do_unregister_framebuffer(struct fb_info *fb_info)
 {
-	struct fb_event event;
 	int ret;
 
 	ret = unbind_console(fb_info);
@@ -1789,9 +1793,15 @@ static int do_unregister_framebuffer(struct fb_info *fb_info)
 	registered_fb[fb_info->node] = NULL;
 	num_registered_fb--;
 	fb_cleanup_device(fb_info);
-	event.info = fb_info;
+#ifdef CONFIG_GUMSTIX_AM200EPD
+	{
+		struct fb_event event;
+		event.info = fb_info;
+		fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
+	}
+#endif
 	console_lock();
-	fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
+	fbcon_fb_unregistered(fb_info);
 	console_unlock();
 
 	/* this may free fb info */
diff --git a/include/linux/fb.h b/include/linux/fb.h
index f52ef0ad6781..288175fafaf6 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -136,10 +136,13 @@ struct fb_cursor_user {
 #define FB_EVENT_RESUME			0x03
 /*      An entry from the modelist was removed */
 #define FB_EVENT_MODE_DELETE            0x04
-/*      A driver registered itself */
+
+#ifdef CONFIG_GUMSTIX_AM200EPD
+/* only used by mach-pxa/am200epd.c */
 #define FB_EVENT_FB_REGISTERED          0x05
-/*      A driver unregistered itself */
 #define FB_EVENT_FB_UNREGISTERED        0x06
+#endif
+
 /*      CONSOLE-SPECIFIC: get console to framebuffer mapping */
 #define FB_EVENT_GET_CONSOLE_MAP        0x07
 /*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index f68a7db14165..94a71e9e1257 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -4,9 +4,13 @@
 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
 void __init fb_console_init(void);
 void __exit fb_console_exit(void);
+int fbcon_fb_registered(struct fb_info *info);
+void fbcon_fb_unregistered(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
+static inline int fbcon_fb_registered(struct fb_info *info) { return 0; }
+static inline void fbcon_fb_unregistered(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 11/33] fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
  2019-05-28  9:02 ` Daniel Vetter
  (?)
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Geert Uytterhoeven, Sam Ravnborg, Maarten Lankhorst

It's dead code, and removing it avoids me having to understand
what it's doing with lock_fb_info.

v2: Also remove sh_mobile_lcdc_must_reconfigure, now unused (Sam).

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> (v1)
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Sam Ravnborg <sam@ravnborg.org>
---
 drivers/video/fbdev/sh_mobile_lcdcfb.c | 82 --------------------------
 drivers/video/fbdev/sh_mobile_lcdcfb.h |  5 --
 2 files changed, 87 deletions(-)

diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
index dc46be38c970..1437695415c9 100644
--- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
+++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
@@ -534,89 +534,9 @@ static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
 		ch->tx_dev->ops->display_off(ch->tx_dev);
 }
 
-static bool
-sh_mobile_lcdc_must_reconfigure(struct sh_mobile_lcdc_chan *ch,
-				const struct fb_videomode *new_mode)
-{
-	dev_dbg(ch->info->dev, "Old %ux%u, new %ux%u\n",
-		ch->display.mode.xres, ch->display.mode.yres,
-		new_mode->xres, new_mode->yres);
-
-	/* It can be a different monitor with an equal video-mode */
-	if (fb_mode_is_equal(&ch->display.mode, new_mode))
-		return false;
-
-	dev_dbg(ch->info->dev, "Switching %u -> %u lines\n",
-		ch->display.mode.yres, new_mode->yres);
-	ch->display.mode = *new_mode;
-
-	return true;
-}
-
 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
 				    struct fb_info *info);
 
-static int sh_mobile_lcdc_display_notify(struct sh_mobile_lcdc_chan *ch,
-					 enum sh_mobile_lcdc_entity_event event,
-					 const struct fb_videomode *mode,
-					 const struct fb_monspecs *monspec)
-{
-	struct fb_info *info = ch->info;
-	struct fb_var_screeninfo var;
-	int ret = 0;
-
-	switch (event) {
-	case SH_MOBILE_LCDC_EVENT_DISPLAY_CONNECT:
-		/* HDMI plug in */
-		console_lock();
-		if (lock_fb_info(info)) {
-
-
-			ch->display.width = monspec->max_x * 10;
-			ch->display.height = monspec->max_y * 10;
-
-			if (!sh_mobile_lcdc_must_reconfigure(ch, mode) &&
-			    info->state == FBINFO_STATE_RUNNING) {
-				/* First activation with the default monitor.
-				 * Just turn on, if we run a resume here, the
-				 * logo disappears.
-				 */
-				info->var.width = ch->display.width;
-				info->var.height = ch->display.height;
-				sh_mobile_lcdc_display_on(ch);
-			} else {
-				/* New monitor or have to wake up */
-				fb_set_suspend(info, 0);
-			}
-
-
-			unlock_fb_info(info);
-		}
-		console_unlock();
-		break;
-
-	case SH_MOBILE_LCDC_EVENT_DISPLAY_DISCONNECT:
-		/* HDMI disconnect */
-		console_lock();
-		if (lock_fb_info(info)) {
-			fb_set_suspend(info, 1);
-			unlock_fb_info(info);
-		}
-		console_unlock();
-		break;
-
-	case SH_MOBILE_LCDC_EVENT_DISPLAY_MODE:
-		/* Validate a proposed new mode */
-		fb_videomode_to_var(&var, mode);
-		var.bits_per_pixel = info->var.bits_per_pixel;
-		var.grayscale = info->var.grayscale;
-		ret = sh_mobile_lcdc_check_var(&var, info);
-		break;
-	}
-
-	return ret;
-}
-
 /* -----------------------------------------------------------------------------
  * Format helpers
  */
@@ -2540,8 +2460,6 @@ sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch)
 	unsigned int max_size;
 	unsigned int i;
 
-	ch->notify = sh_mobile_lcdc_display_notify;
-
 	/* Validate the format. */
 	format = sh_mobile_format_info(cfg->fourcc);
 	if (format == NULL) {
diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.h b/drivers/video/fbdev/sh_mobile_lcdcfb.h
index b8e47a8bd8ab..589400372098 100644
--- a/drivers/video/fbdev/sh_mobile_lcdcfb.h
+++ b/drivers/video/fbdev/sh_mobile_lcdcfb.h
@@ -87,11 +87,6 @@ struct sh_mobile_lcdc_chan {
 	unsigned long base_addr_c;
 	unsigned int line_size;
 
-	int (*notify)(struct sh_mobile_lcdc_chan *ch,
-		      enum sh_mobile_lcdc_entity_event event,
-		      const struct fb_videomode *mode,
-		      const struct fb_monspecs *monspec);
-
 	/* Backlight */
 	struct backlight_device *bl;
 	unsigned int bl_brightness;
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 11/33] fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Geert Uytterhoeven, Bartlomiej Zolnierkiewicz,
	Daniel Vetter, Intel Graphics Development, linux-fbdev,
	DRI Development, Sam Ravnborg

It's dead code, and removing it avoids me having to understand
what it's doing with lock_fb_info.

v2: Also remove sh_mobile_lcdc_must_reconfigure, now unused (Sam).

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> (v1)
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Sam Ravnborg <sam@ravnborg.org>
---
 drivers/video/fbdev/sh_mobile_lcdcfb.c | 82 --------------------------
 drivers/video/fbdev/sh_mobile_lcdcfb.h |  5 --
 2 files changed, 87 deletions(-)

diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
index dc46be38c970..1437695415c9 100644
--- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
+++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
@@ -534,89 +534,9 @@ static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
 		ch->tx_dev->ops->display_off(ch->tx_dev);
 }
 
-static bool
-sh_mobile_lcdc_must_reconfigure(struct sh_mobile_lcdc_chan *ch,
-				const struct fb_videomode *new_mode)
-{
-	dev_dbg(ch->info->dev, "Old %ux%u, new %ux%u\n",
-		ch->display.mode.xres, ch->display.mode.yres,
-		new_mode->xres, new_mode->yres);
-
-	/* It can be a different monitor with an equal video-mode */
-	if (fb_mode_is_equal(&ch->display.mode, new_mode))
-		return false;
-
-	dev_dbg(ch->info->dev, "Switching %u -> %u lines\n",
-		ch->display.mode.yres, new_mode->yres);
-	ch->display.mode = *new_mode;
-
-	return true;
-}
-
 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
 				    struct fb_info *info);
 
-static int sh_mobile_lcdc_display_notify(struct sh_mobile_lcdc_chan *ch,
-					 enum sh_mobile_lcdc_entity_event event,
-					 const struct fb_videomode *mode,
-					 const struct fb_monspecs *monspec)
-{
-	struct fb_info *info = ch->info;
-	struct fb_var_screeninfo var;
-	int ret = 0;
-
-	switch (event) {
-	case SH_MOBILE_LCDC_EVENT_DISPLAY_CONNECT:
-		/* HDMI plug in */
-		console_lock();
-		if (lock_fb_info(info)) {
-
-
-			ch->display.width = monspec->max_x * 10;
-			ch->display.height = monspec->max_y * 10;
-
-			if (!sh_mobile_lcdc_must_reconfigure(ch, mode) &&
-			    info->state = FBINFO_STATE_RUNNING) {
-				/* First activation with the default monitor.
-				 * Just turn on, if we run a resume here, the
-				 * logo disappears.
-				 */
-				info->var.width = ch->display.width;
-				info->var.height = ch->display.height;
-				sh_mobile_lcdc_display_on(ch);
-			} else {
-				/* New monitor or have to wake up */
-				fb_set_suspend(info, 0);
-			}
-
-
-			unlock_fb_info(info);
-		}
-		console_unlock();
-		break;
-
-	case SH_MOBILE_LCDC_EVENT_DISPLAY_DISCONNECT:
-		/* HDMI disconnect */
-		console_lock();
-		if (lock_fb_info(info)) {
-			fb_set_suspend(info, 1);
-			unlock_fb_info(info);
-		}
-		console_unlock();
-		break;
-
-	case SH_MOBILE_LCDC_EVENT_DISPLAY_MODE:
-		/* Validate a proposed new mode */
-		fb_videomode_to_var(&var, mode);
-		var.bits_per_pixel = info->var.bits_per_pixel;
-		var.grayscale = info->var.grayscale;
-		ret = sh_mobile_lcdc_check_var(&var, info);
-		break;
-	}
-
-	return ret;
-}
-
 /* -----------------------------------------------------------------------------
  * Format helpers
  */
@@ -2540,8 +2460,6 @@ sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch)
 	unsigned int max_size;
 	unsigned int i;
 
-	ch->notify = sh_mobile_lcdc_display_notify;
-
 	/* Validate the format. */
 	format = sh_mobile_format_info(cfg->fourcc);
 	if (format = NULL) {
diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.h b/drivers/video/fbdev/sh_mobile_lcdcfb.h
index b8e47a8bd8ab..589400372098 100644
--- a/drivers/video/fbdev/sh_mobile_lcdcfb.h
+++ b/drivers/video/fbdev/sh_mobile_lcdcfb.h
@@ -87,11 +87,6 @@ struct sh_mobile_lcdc_chan {
 	unsigned long base_addr_c;
 	unsigned int line_size;
 
-	int (*notify)(struct sh_mobile_lcdc_chan *ch,
-		      enum sh_mobile_lcdc_entity_event event,
-		      const struct fb_videomode *mode,
-		      const struct fb_monspecs *monspec);
-
 	/* Backlight */
 	struct backlight_device *bl;
 	unsigned int bl_brightness;
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 11/33] fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Geert Uytterhoeven, Bartlomiej Zolnierkiewicz,
	Daniel Vetter, Intel Graphics Development, linux-fbdev,
	DRI Development, Sam Ravnborg

It's dead code, and removing it avoids me having to understand
what it's doing with lock_fb_info.

v2: Also remove sh_mobile_lcdc_must_reconfigure, now unused (Sam).

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> (v1)
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Sam Ravnborg <sam@ravnborg.org>
---
 drivers/video/fbdev/sh_mobile_lcdcfb.c | 82 --------------------------
 drivers/video/fbdev/sh_mobile_lcdcfb.h |  5 --
 2 files changed, 87 deletions(-)

diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
index dc46be38c970..1437695415c9 100644
--- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
+++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
@@ -534,89 +534,9 @@ static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
 		ch->tx_dev->ops->display_off(ch->tx_dev);
 }
 
-static bool
-sh_mobile_lcdc_must_reconfigure(struct sh_mobile_lcdc_chan *ch,
-				const struct fb_videomode *new_mode)
-{
-	dev_dbg(ch->info->dev, "Old %ux%u, new %ux%u\n",
-		ch->display.mode.xres, ch->display.mode.yres,
-		new_mode->xres, new_mode->yres);
-
-	/* It can be a different monitor with an equal video-mode */
-	if (fb_mode_is_equal(&ch->display.mode, new_mode))
-		return false;
-
-	dev_dbg(ch->info->dev, "Switching %u -> %u lines\n",
-		ch->display.mode.yres, new_mode->yres);
-	ch->display.mode = *new_mode;
-
-	return true;
-}
-
 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
 				    struct fb_info *info);
 
-static int sh_mobile_lcdc_display_notify(struct sh_mobile_lcdc_chan *ch,
-					 enum sh_mobile_lcdc_entity_event event,
-					 const struct fb_videomode *mode,
-					 const struct fb_monspecs *monspec)
-{
-	struct fb_info *info = ch->info;
-	struct fb_var_screeninfo var;
-	int ret = 0;
-
-	switch (event) {
-	case SH_MOBILE_LCDC_EVENT_DISPLAY_CONNECT:
-		/* HDMI plug in */
-		console_lock();
-		if (lock_fb_info(info)) {
-
-
-			ch->display.width = monspec->max_x * 10;
-			ch->display.height = monspec->max_y * 10;
-
-			if (!sh_mobile_lcdc_must_reconfigure(ch, mode) &&
-			    info->state == FBINFO_STATE_RUNNING) {
-				/* First activation with the default monitor.
-				 * Just turn on, if we run a resume here, the
-				 * logo disappears.
-				 */
-				info->var.width = ch->display.width;
-				info->var.height = ch->display.height;
-				sh_mobile_lcdc_display_on(ch);
-			} else {
-				/* New monitor or have to wake up */
-				fb_set_suspend(info, 0);
-			}
-
-
-			unlock_fb_info(info);
-		}
-		console_unlock();
-		break;
-
-	case SH_MOBILE_LCDC_EVENT_DISPLAY_DISCONNECT:
-		/* HDMI disconnect */
-		console_lock();
-		if (lock_fb_info(info)) {
-			fb_set_suspend(info, 1);
-			unlock_fb_info(info);
-		}
-		console_unlock();
-		break;
-
-	case SH_MOBILE_LCDC_EVENT_DISPLAY_MODE:
-		/* Validate a proposed new mode */
-		fb_videomode_to_var(&var, mode);
-		var.bits_per_pixel = info->var.bits_per_pixel;
-		var.grayscale = info->var.grayscale;
-		ret = sh_mobile_lcdc_check_var(&var, info);
-		break;
-	}
-
-	return ret;
-}
-
 /* -----------------------------------------------------------------------------
  * Format helpers
  */
@@ -2540,8 +2460,6 @@ sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch)
 	unsigned int max_size;
 	unsigned int i;
 
-	ch->notify = sh_mobile_lcdc_display_notify;
-
 	/* Validate the format. */
 	format = sh_mobile_format_info(cfg->fourcc);
 	if (format == NULL) {
diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.h b/drivers/video/fbdev/sh_mobile_lcdcfb.h
index b8e47a8bd8ab..589400372098 100644
--- a/drivers/video/fbdev/sh_mobile_lcdcfb.h
+++ b/drivers/video/fbdev/sh_mobile_lcdcfb.h
@@ -87,11 +87,6 @@ struct sh_mobile_lcdc_chan {
 	unsigned long base_addr_c;
 	unsigned int line_size;
 
-	int (*notify)(struct sh_mobile_lcdc_chan *ch,
-		      enum sh_mobile_lcdc_entity_event event,
-		      const struct fb_videomode *mode,
-		      const struct fb_monspecs *monspec);
-
 	/* Backlight */
 	struct backlight_device *bl;
 	unsigned int bl_brightness;
-- 
2.20.1

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 12/33] fbdev/omap: sysfs files can't disappear before the device is gone
  2019-05-28  9:02 ` Daniel Vetter
  (?)
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Sam Ravnborg, Maarten Lankhorst

Which means lock_fb_info can never fail. Remove the error handling.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   | 21 +++++++------------
 1 file changed, 7 insertions(+), 14 deletions(-)

diff --git a/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c b/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c
index 8087a009c54f..bd0d20283372 100644
--- a/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c
+++ b/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c
@@ -60,8 +60,7 @@ static ssize_t store_rotate_type(struct device *dev,
 	if (rot_type != OMAP_DSS_ROT_DMA && rot_type != OMAP_DSS_ROT_VRFB)
 		return -EINVAL;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 
 	r = 0;
 	if (rot_type == ofbi->rotation_type)
@@ -112,8 +111,7 @@ static ssize_t store_mirror(struct device *dev,
 	if (r)
 		return r;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 
 	ofbi->mirror = mirror;
 
@@ -149,8 +147,7 @@ static ssize_t show_overlays(struct device *dev,
 	ssize_t l = 0;
 	int t;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 	omapfb_lock(fbdev);
 
 	for (t = 0; t < ofbi->num_overlays; t++) {
@@ -208,8 +205,7 @@ static ssize_t store_overlays(struct device *dev, struct device_attribute *attr,
 	if (buf[len - 1] == '\n')
 		len = len - 1;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 	omapfb_lock(fbdev);
 
 	if (len > 0) {
@@ -340,8 +336,7 @@ static ssize_t show_overlays_rotate(struct device *dev,
 	ssize_t l = 0;
 	int t;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 
 	for (t = 0; t < ofbi->num_overlays; t++) {
 		l += snprintf(buf + l, PAGE_SIZE - l, "%s%d",
@@ -369,8 +364,7 @@ static ssize_t store_overlays_rotate(struct device *dev,
 	if (buf[len - 1] == '\n')
 		len = len - 1;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 
 	if (len > 0) {
 		char *p = (char *)buf;
@@ -453,8 +447,7 @@ static ssize_t store_size(struct device *dev, struct device_attribute *attr,
 
 	size = PAGE_ALIGN(size);
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 
 	if (display && display->driver->sync)
 		display->driver->sync(display);
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 12/33] fbdev/omap: sysfs files can't disappear before the device is gone
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Sam Ravnborg

Which means lock_fb_info can never fail. Remove the error handling.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   | 21 +++++++------------
 1 file changed, 7 insertions(+), 14 deletions(-)

diff --git a/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c b/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c
index 8087a009c54f..bd0d20283372 100644
--- a/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c
+++ b/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c
@@ -60,8 +60,7 @@ static ssize_t store_rotate_type(struct device *dev,
 	if (rot_type != OMAP_DSS_ROT_DMA && rot_type != OMAP_DSS_ROT_VRFB)
 		return -EINVAL;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 
 	r = 0;
 	if (rot_type = ofbi->rotation_type)
@@ -112,8 +111,7 @@ static ssize_t store_mirror(struct device *dev,
 	if (r)
 		return r;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 
 	ofbi->mirror = mirror;
 
@@ -149,8 +147,7 @@ static ssize_t show_overlays(struct device *dev,
 	ssize_t l = 0;
 	int t;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 	omapfb_lock(fbdev);
 
 	for (t = 0; t < ofbi->num_overlays; t++) {
@@ -208,8 +205,7 @@ static ssize_t store_overlays(struct device *dev, struct device_attribute *attr,
 	if (buf[len - 1] = '\n')
 		len = len - 1;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 	omapfb_lock(fbdev);
 
 	if (len > 0) {
@@ -340,8 +336,7 @@ static ssize_t show_overlays_rotate(struct device *dev,
 	ssize_t l = 0;
 	int t;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 
 	for (t = 0; t < ofbi->num_overlays; t++) {
 		l += snprintf(buf + l, PAGE_SIZE - l, "%s%d",
@@ -369,8 +364,7 @@ static ssize_t store_overlays_rotate(struct device *dev,
 	if (buf[len - 1] = '\n')
 		len = len - 1;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 
 	if (len > 0) {
 		char *p = (char *)buf;
@@ -453,8 +447,7 @@ static ssize_t store_size(struct device *dev, struct device_attribute *attr,
 
 	size = PAGE_ALIGN(size);
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 
 	if (display && display->driver->sync)
 		display->driver->sync(display);
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 12/33] fbdev/omap: sysfs files can't disappear before the device is gone
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Sam Ravnborg

Which means lock_fb_info can never fail. Remove the error handling.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   | 21 +++++++------------
 1 file changed, 7 insertions(+), 14 deletions(-)

diff --git a/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c b/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c
index 8087a009c54f..bd0d20283372 100644
--- a/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c
+++ b/drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c
@@ -60,8 +60,7 @@ static ssize_t store_rotate_type(struct device *dev,
 	if (rot_type != OMAP_DSS_ROT_DMA && rot_type != OMAP_DSS_ROT_VRFB)
 		return -EINVAL;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 
 	r = 0;
 	if (rot_type == ofbi->rotation_type)
@@ -112,8 +111,7 @@ static ssize_t store_mirror(struct device *dev,
 	if (r)
 		return r;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 
 	ofbi->mirror = mirror;
 
@@ -149,8 +147,7 @@ static ssize_t show_overlays(struct device *dev,
 	ssize_t l = 0;
 	int t;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 	omapfb_lock(fbdev);
 
 	for (t = 0; t < ofbi->num_overlays; t++) {
@@ -208,8 +205,7 @@ static ssize_t store_overlays(struct device *dev, struct device_attribute *attr,
 	if (buf[len - 1] == '\n')
 		len = len - 1;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 	omapfb_lock(fbdev);
 
 	if (len > 0) {
@@ -340,8 +336,7 @@ static ssize_t show_overlays_rotate(struct device *dev,
 	ssize_t l = 0;
 	int t;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 
 	for (t = 0; t < ofbi->num_overlays; t++) {
 		l += snprintf(buf + l, PAGE_SIZE - l, "%s%d",
@@ -369,8 +364,7 @@ static ssize_t store_overlays_rotate(struct device *dev,
 	if (buf[len - 1] == '\n')
 		len = len - 1;
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 
 	if (len > 0) {
 		char *p = (char *)buf;
@@ -453,8 +447,7 @@ static ssize_t store_size(struct device *dev, struct device_attribute *attr,
 
 	size = PAGE_ALIGN(size);
 
-	if (!lock_fb_info(fbi))
-		return -ENODEV;
+	lock_fb_info(fbi);
 
 	if (display && display->driver->sync)
 		display->driver->sync(display);
-- 
2.20.1

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 13/33] fbdev: sysfs files can't disappear before the device is gone
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Sam Ravnborg, Maarten Lankhorst, Rob Clark

Which means lock_fb_info can never fail. Remove the error handling.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Rob Clark <robdclark@gmail.com>
---
 drivers/video/fbdev/core/fbsysfs.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/video/fbdev/core/fbsysfs.c b/drivers/video/fbdev/core/fbsysfs.c
index 44cca39f2b51..5f329278e55f 100644
--- a/drivers/video/fbdev/core/fbsysfs.c
+++ b/drivers/video/fbdev/core/fbsysfs.c
@@ -179,10 +179,7 @@ static ssize_t store_modes(struct device *device,
 		return -EINVAL;
 
 	console_lock();
-	if (!lock_fb_info(fb_info)) {
-		console_unlock();
-		return -ENODEV;
-	}
+	lock_fb_info(fb_info);
 
 	list_splice(&fb_info->modelist, &old_list);
 	fb_videomode_to_modelist((const struct fb_videomode *)buf, i,
@@ -409,10 +406,7 @@ static ssize_t store_fbstate(struct device *device,
 	state = simple_strtoul(buf, &last, 0);
 
 	console_lock();
-	if (!lock_fb_info(fb_info)) {
-		console_unlock();
-		return -ENODEV;
-	}
+	lock_fb_info(fb_info);
 
 	fb_set_suspend(fb_info, (int)state);
 
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 13/33] fbdev: sysfs files can't disappear before the device is gone
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Sam Ravnborg, Maarten Lankhorst, Rob Clark

Which means lock_fb_info can never fail. Remove the error handling.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Rob Clark <robdclark@gmail.com>
---
 drivers/video/fbdev/core/fbsysfs.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/video/fbdev/core/fbsysfs.c b/drivers/video/fbdev/core/fbsysfs.c
index 44cca39f2b51..5f329278e55f 100644
--- a/drivers/video/fbdev/core/fbsysfs.c
+++ b/drivers/video/fbdev/core/fbsysfs.c
@@ -179,10 +179,7 @@ static ssize_t store_modes(struct device *device,
 		return -EINVAL;
 
 	console_lock();
-	if (!lock_fb_info(fb_info)) {
-		console_unlock();
-		return -ENODEV;
-	}
+	lock_fb_info(fb_info);
 
 	list_splice(&fb_info->modelist, &old_list);
 	fb_videomode_to_modelist((const struct fb_videomode *)buf, i,
@@ -409,10 +406,7 @@ static ssize_t store_fbstate(struct device *device,
 	state = simple_strtoul(buf, &last, 0);
 
 	console_lock();
-	if (!lock_fb_info(fb_info)) {
-		console_unlock();
-		return -ENODEV;
-	}
+	lock_fb_info(fb_info);
 
 	fb_set_suspend(fb_info, (int)state);
 
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 14/33] staging/olpc: lock_fb_info can't fail
  2019-05-28  9:02 ` Daniel Vetter
  (?)
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Sam Ravnborg, Greg Kroah-Hartman, Maarten Lankhorst,
	Jens Frederich, Daniel Drake, Jon Nettleton

Simply because olpc never unregisters the damn thing. It also
registers the framebuffer directly by poking around in fbdev
core internals, so it's all around rather broken.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jens Frederich <jfrederich@gmail.com>
Cc: Daniel Drake <dsd@laptop.org>
Cc: Jon Nettleton <jon.nettleton@gmail.com>
---
 drivers/staging/olpc_dcon/olpc_dcon.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/staging/olpc_dcon/olpc_dcon.c b/drivers/staging/olpc_dcon/olpc_dcon.c
index 6b714f740ac3..a254238be181 100644
--- a/drivers/staging/olpc_dcon/olpc_dcon.c
+++ b/drivers/staging/olpc_dcon/olpc_dcon.c
@@ -250,11 +250,7 @@ static bool dcon_blank_fb(struct dcon_priv *dcon, bool blank)
 	int err;
 
 	console_lock();
-	if (!lock_fb_info(dcon->fbinfo)) {
-		console_unlock();
-		dev_err(&dcon->client->dev, "unable to lock framebuffer\n");
-		return false;
-	}
+	lock_fb_info(dcon->fbinfo);
 
 	dcon->ignore_fb_events = true;
 	err = fb_blank(dcon->fbinfo,
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 14/33] staging/olpc: lock_fb_info can't fail
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Daniel Drake, Bartlomiej Zolnierkiewicz,
	Daniel Vetter, Intel Graphics Development, Jens Frederich,
	linux-fbdev, DRI Development, Greg Kroah-Hartman, Sam Ravnborg,
	Jon Nettleton

Simply because olpc never unregisters the damn thing. It also
registers the framebuffer directly by poking around in fbdev
core internals, so it's all around rather broken.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jens Frederich <jfrederich@gmail.com>
Cc: Daniel Drake <dsd@laptop.org>
Cc: Jon Nettleton <jon.nettleton@gmail.com>
---
 drivers/staging/olpc_dcon/olpc_dcon.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/staging/olpc_dcon/olpc_dcon.c b/drivers/staging/olpc_dcon/olpc_dcon.c
index 6b714f740ac3..a254238be181 100644
--- a/drivers/staging/olpc_dcon/olpc_dcon.c
+++ b/drivers/staging/olpc_dcon/olpc_dcon.c
@@ -250,11 +250,7 @@ static bool dcon_blank_fb(struct dcon_priv *dcon, bool blank)
 	int err;
 
 	console_lock();
-	if (!lock_fb_info(dcon->fbinfo)) {
-		console_unlock();
-		dev_err(&dcon->client->dev, "unable to lock framebuffer\n");
-		return false;
-	}
+	lock_fb_info(dcon->fbinfo);
 
 	dcon->ignore_fb_events = true;
 	err = fb_blank(dcon->fbinfo,
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 14/33] staging/olpc: lock_fb_info can't fail
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Daniel Drake, Bartlomiej Zolnierkiewicz,
	Daniel Vetter, Intel Graphics Development, Jens Frederich,
	linux-fbdev, DRI Development, Greg Kroah-Hartman, Sam Ravnborg,
	Jon Nettleton

Simply because olpc never unregisters the damn thing. It also
registers the framebuffer directly by poking around in fbdev
core internals, so it's all around rather broken.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jens Frederich <jfrederich@gmail.com>
Cc: Daniel Drake <dsd@laptop.org>
Cc: Jon Nettleton <jon.nettleton@gmail.com>
---
 drivers/staging/olpc_dcon/olpc_dcon.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/staging/olpc_dcon/olpc_dcon.c b/drivers/staging/olpc_dcon/olpc_dcon.c
index 6b714f740ac3..a254238be181 100644
--- a/drivers/staging/olpc_dcon/olpc_dcon.c
+++ b/drivers/staging/olpc_dcon/olpc_dcon.c
@@ -250,11 +250,7 @@ static bool dcon_blank_fb(struct dcon_priv *dcon, bool blank)
 	int err;
 
 	console_lock();
-	if (!lock_fb_info(dcon->fbinfo)) {
-		console_unlock();
-		dev_err(&dcon->client->dev, "unable to lock framebuffer\n");
-		return false;
-	}
+	lock_fb_info(dcon->fbinfo);
 
 	dcon->ignore_fb_events = true;
 	err = fb_blank(dcon->fbinfo,
-- 
2.20.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 15/33] fbdev/atyfb: lock_fb_info can't fail
  2019-05-28  9:02 ` Daniel Vetter
  (?)
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Sam Ravnborg, Maarten Lankhorst, Mikulas Patocka,
	David S. Miller, Ville Syrjälä

It's properly protected by reboot_lock.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "Ville Syrjälä" <syrjala@sci.fi>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/video/fbdev/aty/atyfb_base.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/video/fbdev/aty/atyfb_base.c b/drivers/video/fbdev/aty/atyfb_base.c
index b6fe103df145..eebb62d82a23 100644
--- a/drivers/video/fbdev/aty/atyfb_base.c
+++ b/drivers/video/fbdev/aty/atyfb_base.c
@@ -3916,8 +3916,7 @@ static int atyfb_reboot_notify(struct notifier_block *nb,
 	if (!reboot_info)
 		goto out;
 
-	if (!lock_fb_info(reboot_info))
-		goto out;
+	lock_fb_info(reboot_info);
 
 	par = reboot_info->par;
 
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 15/33] fbdev/atyfb: lock_fb_info can't fail
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Mikulas Patocka, Ville Syrjälä,
	Sam Ravnborg, David S. Miller

It's properly protected by reboot_lock.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "Ville Syrjälä" <syrjala@sci.fi>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/video/fbdev/aty/atyfb_base.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/video/fbdev/aty/atyfb_base.c b/drivers/video/fbdev/aty/atyfb_base.c
index b6fe103df145..eebb62d82a23 100644
--- a/drivers/video/fbdev/aty/atyfb_base.c
+++ b/drivers/video/fbdev/aty/atyfb_base.c
@@ -3916,8 +3916,7 @@ static int atyfb_reboot_notify(struct notifier_block *nb,
 	if (!reboot_info)
 		goto out;
 
-	if (!lock_fb_info(reboot_info))
-		goto out;
+	lock_fb_info(reboot_info);
 
 	par = reboot_info->par;
 
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 15/33] fbdev/atyfb: lock_fb_info can't fail
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Mikulas Patocka, Ville Syrjälä,
	Sam Ravnborg, David S. Miller

It's properly protected by reboot_lock.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "Ville Syrjälä" <syrjala@sci.fi>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/video/fbdev/aty/atyfb_base.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/video/fbdev/aty/atyfb_base.c b/drivers/video/fbdev/aty/atyfb_base.c
index b6fe103df145..eebb62d82a23 100644
--- a/drivers/video/fbdev/aty/atyfb_base.c
+++ b/drivers/video/fbdev/aty/atyfb_base.c
@@ -3916,8 +3916,7 @@ static int atyfb_reboot_notify(struct notifier_block *nb,
 	if (!reboot_info)
 		goto out;
 
-	if (!lock_fb_info(reboot_info))
-		goto out;
+	lock_fb_info(reboot_info);
 
 	par = reboot_info->par;
 
-- 
2.20.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 16/33] fbdev: lock_fb_info cannot fail
  2019-05-28  9:02 ` Daniel Vetter
  (?)
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Yisheng Xie, Sergey Senozhatsky, Noralf Trønnes,
	Peter Rosin, Michał Mirosław, Mikulas Patocka,
	Gustavo A. R. Silva

Ever since

commit c47747fde931c02455683bd00ea43eaa62f35b0e
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Wed May 11 14:58:34 2011 -0700

    fbmem: make read/write/ioctl use the frame buffer at open time

fbdev has gained proper refcounting for the fbinfo attached to any
open files, which means that the backing driver (stored in
fb_info->fbops) cannot untimely disappear anymore.

The only thing that can happen is that the entire device just outright
disappears and gets unregistered, but file_fb_info does check for
that. Except that it's racy - it only checks once at the start of a
file_ops, there's no guarantee that the underlying fbdev won't
untimely disappear. Aside: A proper way to fix that race is probably
to replicate the srcu trickery we've rolled out in drm.

But given that this race has existed since forever it's probably not
one we need to fix right away. do_unregister_framebuffer also nowhere
clears fb_info->fbops, hence the check in lock_fb_info can't possible
catch a disappearing fbdev later on.

Long story short: Ever since the above commit the fb_info->fbops
checks have essentially become dead code. Remove this all.

Aside from the file_ops callbacks, and stuff called from there
there's only register/unregister code left. If that goes wrong a driver
managed to register/unregister a device instance twice or in the wrong
order.  That's just a driver bug.

v2:
- fb_mmap had an open-coded version of the fbinfo->fops check, because
  it doesn't need the fbinfo->lock. Delete that too.
- Use the wrapper function in fb_open/release now, since no difference
  anymore.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Peter Rosin <peda@axentia.se>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/core/fbcmap.c |  6 +--
 drivers/video/fbdev/core/fbcon.c  |  3 +-
 drivers/video/fbdev/core/fbmem.c  | 73 +++++++------------------------
 include/linux/fb.h                |  5 ++-
 4 files changed, 23 insertions(+), 64 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcmap.c b/drivers/video/fbdev/core/fbcmap.c
index 2811c4afde01..e5ae33c1a8e8 100644
--- a/drivers/video/fbdev/core/fbcmap.c
+++ b/drivers/video/fbdev/core/fbcmap.c
@@ -285,11 +285,7 @@ int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *info)
 		goto out;
 	}
 	umap.start = cmap->start;
-	if (!lock_fb_info(info)) {
-		rc = -ENODEV;
-		goto out;
-	}
-
+	lock_fb_info(info);
 	rc = fb_set_cmap(&umap, info);
 	unlock_fb_info(info);
 out:
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 5a9fe0c0dd3c..a7e2d5b88914 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -2364,8 +2364,7 @@ static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
 	}
 
 
-	if (!lock_fb_info(info))
-		return;
+	lock_fb_info(info);
 	event.info = info;
 	event.data = &blank;
 	fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index bed7698ad18a..d73762324ca2 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -80,17 +80,6 @@ static void put_fb_info(struct fb_info *fb_info)
 		fb_info->fbops->fb_destroy(fb_info);
 }
 
-int lock_fb_info(struct fb_info *info)
-{
-	mutex_lock(&info->lock);
-	if (!info->fbops) {
-		mutex_unlock(&info->lock);
-		return 0;
-	}
-	return 1;
-}
-EXPORT_SYMBOL(lock_fb_info);
-
 /*
  * Helpers
  */
@@ -1121,8 +1110,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 
 	switch (cmd) {
 	case FBIOGET_VSCREENINFO:
-		if (!lock_fb_info(info))
-			return -ENODEV;
+		lock_fb_info(info);
 		var = info->var;
 		unlock_fb_info(info);
 
@@ -1132,10 +1120,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		if (copy_from_user(&var, argp, sizeof(var)))
 			return -EFAULT;
 		console_lock();
-		if (!lock_fb_info(info)) {
-			console_unlock();
-			return -ENODEV;
-		}
+		lock_fb_info(info);
 		info->flags |= FBINFO_MISC_USEREVENT;
 		ret = fb_set_var(info, &var);
 		info->flags &= ~FBINFO_MISC_USEREVENT;
@@ -1145,8 +1130,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 			ret = -EFAULT;
 		break;
 	case FBIOGET_FSCREENINFO:
-		if (!lock_fb_info(info))
-			return -ENODEV;
+		lock_fb_info(info);
 		fix = info->fix;
 		if (info->flags & FBINFO_HIDE_SMEM_START)
 			fix.smem_start = 0;
@@ -1162,8 +1146,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 	case FBIOGETCMAP:
 		if (copy_from_user(&cmap, argp, sizeof(cmap)))
 			return -EFAULT;
-		if (!lock_fb_info(info))
-			return -ENODEV;
+		lock_fb_info(info);
 		cmap_from = info->cmap;
 		unlock_fb_info(info);
 		ret = fb_cmap_to_user(&cmap_from, &cmap);
@@ -1172,10 +1155,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		if (copy_from_user(&var, argp, sizeof(var)))
 			return -EFAULT;
 		console_lock();
-		if (!lock_fb_info(info)) {
-			console_unlock();
-			return -ENODEV;
-		}
+		lock_fb_info(info);
 		ret = fb_pan_display(info, &var);
 		unlock_fb_info(info);
 		console_unlock();
@@ -1192,8 +1172,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 			return -EINVAL;
 		con2fb.framebuffer = -1;
 		event.data = &con2fb;
-		if (!lock_fb_info(info))
-			return -ENODEV;
+		lock_fb_info(info);
 		event.info = info;
 		fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
 		unlock_fb_info(info);
@@ -1214,10 +1193,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		}
 		event.data = &con2fb;
 		console_lock();
-		if (!lock_fb_info(info)) {
-			console_unlock();
-			return -ENODEV;
-		}
+		lock_fb_info(info);
 		event.info = info;
 		ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event);
 		unlock_fb_info(info);
@@ -1225,10 +1201,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		break;
 	case FBIOBLANK:
 		console_lock();
-		if (!lock_fb_info(info)) {
-			console_unlock();
-			return -ENODEV;
-		}
+		lock_fb_info(info);
 		info->flags |= FBINFO_MISC_USEREVENT;
 		ret = fb_blank(info, arg);
 		info->flags &= ~FBINFO_MISC_USEREVENT;
@@ -1236,8 +1209,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		console_unlock();
 		break;
 	default:
-		if (!lock_fb_info(info))
-			return -ENODEV;
+		lock_fb_info(info);
 		fb = info->fbops;
 		if (fb->fb_ioctl)
 			ret = fb->fb_ioctl(info, cmd, arg);
@@ -1357,8 +1329,7 @@ static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
 {
 	struct fb_fix_screeninfo fix;
 
-	if (!lock_fb_info(info))
-		return -ENODEV;
+	lock_fb_info(info);
 	fix = info->fix;
 	if (info->flags & FBINFO_HIDE_SMEM_START)
 		fix.smem_start = 0;
@@ -1418,8 +1389,6 @@ fb_mmap(struct file *file, struct vm_area_struct * vma)
 	if (!info)
 		return -ENODEV;
 	fb = info->fbops;
-	if (!fb)
-		return -ENODEV;
 	mutex_lock(&info->mm_lock);
 	if (fb->fb_mmap) {
 		int res;
@@ -1483,7 +1452,7 @@ __releases(&info->lock)
 	if (IS_ERR(info))
 		return PTR_ERR(info);
 
-	mutex_lock(&info->lock);
+	lock_fb_info(info);
 	if (!try_module_get(info->fbops->owner)) {
 		res = -ENODEV;
 		goto out;
@@ -1499,7 +1468,7 @@ __releases(&info->lock)
 		fb_deferred_io_open(info, inode, file);
 #endif
 out:
-	mutex_unlock(&info->lock);
+	unlock_fb_info(info);
 	if (res)
 		put_fb_info(info);
 	return res;
@@ -1512,11 +1481,11 @@ __releases(&info->lock)
 {
 	struct fb_info * const info = file->private_data;
 
-	mutex_lock(&info->lock);
+	lock_fb_info(info);
 	if (info->fbops->fb_release)
 		info->fbops->fb_release(info,1);
 	module_put(info->fbops->owner);
-	mutex_unlock(&info->lock);
+	unlock_fb_info(info);
 	put_fb_info(info);
 	return 0;
 }
@@ -1734,14 +1703,10 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 		console_lock();
 	else
 		atomic_inc(&ignore_console_lock_warning);
-	if (!lock_fb_info(fb_info)) {
-		ret = -ENODEV;
-		goto unlock_console;
-	}
-
+	lock_fb_info(fb_info);
 	ret = fbcon_fb_registered(fb_info);
 	unlock_fb_info(fb_info);
-unlock_console:
+
 	if (!lockless_register_fb)
 		console_unlock();
 	else
@@ -1759,11 +1724,7 @@ static int unbind_console(struct fb_info *fb_info)
 		return -EINVAL;
 
 	console_lock();
-	if (!lock_fb_info(fb_info)) {
-		console_unlock();
-		return -ENODEV;
-	}
-
+	lock_fb_info(fb_info);
 	event.info = fb_info;
 	ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
 	unlock_fb_info(fb_info);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 288175fafaf6..aa8f18163151 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -663,7 +663,10 @@ extern struct class *fb_class;
 	for (i = 0; i < FB_MAX; i++)		\
 		if (!registered_fb[i]) {} else
 
-extern int lock_fb_info(struct fb_info *info);
+static inline void lock_fb_info(struct fb_info *info)
+{
+	mutex_lock(&info->lock);
+}
 
 static inline void unlock_fb_info(struct fb_info *info)
 {
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 16/33] fbdev: lock_fb_info cannot fail
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Yisheng Xie, Sergey Senozhatsky, Noralf Trønnes,
	Peter Rosin, Michał Mirosław, Mikulas Patocka,
	Gustavo A. R. Silva

Ever since

commit c47747fde931c02455683bd00ea43eaa62f35b0e
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Wed May 11 14:58:34 2011 -0700

    fbmem: make read/write/ioctl use the frame buffer at open time

fbdev has gained proper refcounting for the fbinfo attached to any
open files, which means that the backing driver (stored in
fb_info->fbops) cannot untimely disappear anymore.

The only thing that can happen is that the entire device just outright
disappears and gets unregistered, but file_fb_info does check for
that. Except that it's racy - it only checks once at the start of a
file_ops, there's no guarantee that the underlying fbdev won't
untimely disappear. Aside: A proper way to fix that race is probably
to replicate the srcu trickery we've rolled out in drm.

But given that this race has existed since forever it's probably not
one we need to fix right away. do_unregister_framebuffer also nowhere
clears fb_info->fbops, hence the check in lock_fb_info can't possible
catch a disappearing fbdev later on.

Long story short: Ever since the above commit the fb_info->fbops
checks have essentially become dead code. Remove this all.

Aside from the file_ops callbacks, and stuff called from there
there's only register/unregister code left. If that goes wrong a driver
managed to register/unregister a device instance twice or in the wrong
order.  That's just a driver bug.

v2:
- fb_mmap had an open-coded version of the fbinfo->fops check, because
  it doesn't need the fbinfo->lock. Delete that too.
- Use the wrapper function in fb_open/release now, since no difference
  anymore.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Peter Rosin <peda@axentia.se>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/core/fbcmap.c |  6 +--
 drivers/video/fbdev/core/fbcon.c  |  3 +-
 drivers/video/fbdev/core/fbmem.c  | 73 +++++++------------------------
 include/linux/fb.h                |  5 ++-
 4 files changed, 23 insertions(+), 64 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcmap.c b/drivers/video/fbdev/core/fbcmap.c
index 2811c4afde01..e5ae33c1a8e8 100644
--- a/drivers/video/fbdev/core/fbcmap.c
+++ b/drivers/video/fbdev/core/fbcmap.c
@@ -285,11 +285,7 @@ int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *info)
 		goto out;
 	}
 	umap.start = cmap->start;
-	if (!lock_fb_info(info)) {
-		rc = -ENODEV;
-		goto out;
-	}
-
+	lock_fb_info(info);
 	rc = fb_set_cmap(&umap, info);
 	unlock_fb_info(info);
 out:
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 5a9fe0c0dd3c..a7e2d5b88914 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -2364,8 +2364,7 @@ static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
 	}
 
 
-	if (!lock_fb_info(info))
-		return;
+	lock_fb_info(info);
 	event.info = info;
 	event.data = &blank;
 	fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index bed7698ad18a..d73762324ca2 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -80,17 +80,6 @@ static void put_fb_info(struct fb_info *fb_info)
 		fb_info->fbops->fb_destroy(fb_info);
 }
 
-int lock_fb_info(struct fb_info *info)
-{
-	mutex_lock(&info->lock);
-	if (!info->fbops) {
-		mutex_unlock(&info->lock);
-		return 0;
-	}
-	return 1;
-}
-EXPORT_SYMBOL(lock_fb_info);
-
 /*
  * Helpers
  */
@@ -1121,8 +1110,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 
 	switch (cmd) {
 	case FBIOGET_VSCREENINFO:
-		if (!lock_fb_info(info))
-			return -ENODEV;
+		lock_fb_info(info);
 		var = info->var;
 		unlock_fb_info(info);
 
@@ -1132,10 +1120,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		if (copy_from_user(&var, argp, sizeof(var)))
 			return -EFAULT;
 		console_lock();
-		if (!lock_fb_info(info)) {
-			console_unlock();
-			return -ENODEV;
-		}
+		lock_fb_info(info);
 		info->flags |= FBINFO_MISC_USEREVENT;
 		ret = fb_set_var(info, &var);
 		info->flags &= ~FBINFO_MISC_USEREVENT;
@@ -1145,8 +1130,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 			ret = -EFAULT;
 		break;
 	case FBIOGET_FSCREENINFO:
-		if (!lock_fb_info(info))
-			return -ENODEV;
+		lock_fb_info(info);
 		fix = info->fix;
 		if (info->flags & FBINFO_HIDE_SMEM_START)
 			fix.smem_start = 0;
@@ -1162,8 +1146,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 	case FBIOGETCMAP:
 		if (copy_from_user(&cmap, argp, sizeof(cmap)))
 			return -EFAULT;
-		if (!lock_fb_info(info))
-			return -ENODEV;
+		lock_fb_info(info);
 		cmap_from = info->cmap;
 		unlock_fb_info(info);
 		ret = fb_cmap_to_user(&cmap_from, &cmap);
@@ -1172,10 +1155,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		if (copy_from_user(&var, argp, sizeof(var)))
 			return -EFAULT;
 		console_lock();
-		if (!lock_fb_info(info)) {
-			console_unlock();
-			return -ENODEV;
-		}
+		lock_fb_info(info);
 		ret = fb_pan_display(info, &var);
 		unlock_fb_info(info);
 		console_unlock();
@@ -1192,8 +1172,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 			return -EINVAL;
 		con2fb.framebuffer = -1;
 		event.data = &con2fb;
-		if (!lock_fb_info(info))
-			return -ENODEV;
+		lock_fb_info(info);
 		event.info = info;
 		fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
 		unlock_fb_info(info);
@@ -1214,10 +1193,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		}
 		event.data = &con2fb;
 		console_lock();
-		if (!lock_fb_info(info)) {
-			console_unlock();
-			return -ENODEV;
-		}
+		lock_fb_info(info);
 		event.info = info;
 		ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event);
 		unlock_fb_info(info);
@@ -1225,10 +1201,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		break;
 	case FBIOBLANK:
 		console_lock();
-		if (!lock_fb_info(info)) {
-			console_unlock();
-			return -ENODEV;
-		}
+		lock_fb_info(info);
 		info->flags |= FBINFO_MISC_USEREVENT;
 		ret = fb_blank(info, arg);
 		info->flags &= ~FBINFO_MISC_USEREVENT;
@@ -1236,8 +1209,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		console_unlock();
 		break;
 	default:
-		if (!lock_fb_info(info))
-			return -ENODEV;
+		lock_fb_info(info);
 		fb = info->fbops;
 		if (fb->fb_ioctl)
 			ret = fb->fb_ioctl(info, cmd, arg);
@@ -1357,8 +1329,7 @@ static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
 {
 	struct fb_fix_screeninfo fix;
 
-	if (!lock_fb_info(info))
-		return -ENODEV;
+	lock_fb_info(info);
 	fix = info->fix;
 	if (info->flags & FBINFO_HIDE_SMEM_START)
 		fix.smem_start = 0;
@@ -1418,8 +1389,6 @@ fb_mmap(struct file *file, struct vm_area_struct * vma)
 	if (!info)
 		return -ENODEV;
 	fb = info->fbops;
-	if (!fb)
-		return -ENODEV;
 	mutex_lock(&info->mm_lock);
 	if (fb->fb_mmap) {
 		int res;
@@ -1483,7 +1452,7 @@ __releases(&info->lock)
 	if (IS_ERR(info))
 		return PTR_ERR(info);
 
-	mutex_lock(&info->lock);
+	lock_fb_info(info);
 	if (!try_module_get(info->fbops->owner)) {
 		res = -ENODEV;
 		goto out;
@@ -1499,7 +1468,7 @@ __releases(&info->lock)
 		fb_deferred_io_open(info, inode, file);
 #endif
 out:
-	mutex_unlock(&info->lock);
+	unlock_fb_info(info);
 	if (res)
 		put_fb_info(info);
 	return res;
@@ -1512,11 +1481,11 @@ __releases(&info->lock)
 {
 	struct fb_info * const info = file->private_data;
 
-	mutex_lock(&info->lock);
+	lock_fb_info(info);
 	if (info->fbops->fb_release)
 		info->fbops->fb_release(info,1);
 	module_put(info->fbops->owner);
-	mutex_unlock(&info->lock);
+	unlock_fb_info(info);
 	put_fb_info(info);
 	return 0;
 }
@@ -1734,14 +1703,10 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 		console_lock();
 	else
 		atomic_inc(&ignore_console_lock_warning);
-	if (!lock_fb_info(fb_info)) {
-		ret = -ENODEV;
-		goto unlock_console;
-	}
-
+	lock_fb_info(fb_info);
 	ret = fbcon_fb_registered(fb_info);
 	unlock_fb_info(fb_info);
-unlock_console:
+
 	if (!lockless_register_fb)
 		console_unlock();
 	else
@@ -1759,11 +1724,7 @@ static int unbind_console(struct fb_info *fb_info)
 		return -EINVAL;
 
 	console_lock();
-	if (!lock_fb_info(fb_info)) {
-		console_unlock();
-		return -ENODEV;
-	}
-
+	lock_fb_info(fb_info);
 	event.info = fb_info;
 	ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
 	unlock_fb_info(fb_info);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 288175fafaf6..aa8f18163151 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -663,7 +663,10 @@ extern struct class *fb_class;
 	for (i = 0; i < FB_MAX; i++)		\
 		if (!registered_fb[i]) {} else
 
-extern int lock_fb_info(struct fb_info *info);
+static inline void lock_fb_info(struct fb_info *info)
+{
+	mutex_lock(&info->lock);
+}
 
 static inline void unlock_fb_info(struct fb_info *info)
 {
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 16/33] fbdev: lock_fb_info cannot fail
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Yisheng Xie, Sergey Senozhatsky, Noralf Trønnes,
	Peter Rosin, Michał Mirosław, Mikulas Patocka,
	Gustavo A. R. Silva

Ever since

commit c47747fde931c02455683bd00ea43eaa62f35b0e
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Wed May 11 14:58:34 2011 -0700

    fbmem: make read/write/ioctl use the frame buffer at open time

fbdev has gained proper refcounting for the fbinfo attached to any
open files, which means that the backing driver (stored in
fb_info->fbops) cannot untimely disappear anymore.

The only thing that can happen is that the entire device just outright
disappears and gets unregistered, but file_fb_info does check for
that. Except that it's racy - it only checks once at the start of a
file_ops, there's no guarantee that the underlying fbdev won't
untimely disappear. Aside: A proper way to fix that race is probably
to replicate the srcu trickery we've rolled out in drm.

But given that this race has existed since forever it's probably not
one we need to fix right away. do_unregister_framebuffer also nowhere
clears fb_info->fbops, hence the check in lock_fb_info can't possible
catch a disappearing fbdev later on.

Long story short: Ever since the above commit the fb_info->fbops
checks have essentially become dead code. Remove this all.

Aside from the file_ops callbacks, and stuff called from there
there's only register/unregister code left. If that goes wrong a driver
managed to register/unregister a device instance twice or in the wrong
order.  That's just a driver bug.

v2:
- fb_mmap had an open-coded version of the fbinfo->fops check, because
  it doesn't need the fbinfo->lock. Delete that too.
- Use the wrapper function in fb_open/release now, since no difference
  anymore.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Peter Rosin <peda@axentia.se>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/core/fbcmap.c |  6 +--
 drivers/video/fbdev/core/fbcon.c  |  3 +-
 drivers/video/fbdev/core/fbmem.c  | 73 +++++++------------------------
 include/linux/fb.h                |  5 ++-
 4 files changed, 23 insertions(+), 64 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcmap.c b/drivers/video/fbdev/core/fbcmap.c
index 2811c4afde01..e5ae33c1a8e8 100644
--- a/drivers/video/fbdev/core/fbcmap.c
+++ b/drivers/video/fbdev/core/fbcmap.c
@@ -285,11 +285,7 @@ int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *info)
 		goto out;
 	}
 	umap.start = cmap->start;
-	if (!lock_fb_info(info)) {
-		rc = -ENODEV;
-		goto out;
-	}
-
+	lock_fb_info(info);
 	rc = fb_set_cmap(&umap, info);
 	unlock_fb_info(info);
 out:
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 5a9fe0c0dd3c..a7e2d5b88914 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -2364,8 +2364,7 @@ static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
 	}
 
 
-	if (!lock_fb_info(info))
-		return;
+	lock_fb_info(info);
 	event.info = info;
 	event.data = &blank;
 	fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index bed7698ad18a..d73762324ca2 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -80,17 +80,6 @@ static void put_fb_info(struct fb_info *fb_info)
 		fb_info->fbops->fb_destroy(fb_info);
 }
 
-int lock_fb_info(struct fb_info *info)
-{
-	mutex_lock(&info->lock);
-	if (!info->fbops) {
-		mutex_unlock(&info->lock);
-		return 0;
-	}
-	return 1;
-}
-EXPORT_SYMBOL(lock_fb_info);
-
 /*
  * Helpers
  */
@@ -1121,8 +1110,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 
 	switch (cmd) {
 	case FBIOGET_VSCREENINFO:
-		if (!lock_fb_info(info))
-			return -ENODEV;
+		lock_fb_info(info);
 		var = info->var;
 		unlock_fb_info(info);
 
@@ -1132,10 +1120,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		if (copy_from_user(&var, argp, sizeof(var)))
 			return -EFAULT;
 		console_lock();
-		if (!lock_fb_info(info)) {
-			console_unlock();
-			return -ENODEV;
-		}
+		lock_fb_info(info);
 		info->flags |= FBINFO_MISC_USEREVENT;
 		ret = fb_set_var(info, &var);
 		info->flags &= ~FBINFO_MISC_USEREVENT;
@@ -1145,8 +1130,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 			ret = -EFAULT;
 		break;
 	case FBIOGET_FSCREENINFO:
-		if (!lock_fb_info(info))
-			return -ENODEV;
+		lock_fb_info(info);
 		fix = info->fix;
 		if (info->flags & FBINFO_HIDE_SMEM_START)
 			fix.smem_start = 0;
@@ -1162,8 +1146,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 	case FBIOGETCMAP:
 		if (copy_from_user(&cmap, argp, sizeof(cmap)))
 			return -EFAULT;
-		if (!lock_fb_info(info))
-			return -ENODEV;
+		lock_fb_info(info);
 		cmap_from = info->cmap;
 		unlock_fb_info(info);
 		ret = fb_cmap_to_user(&cmap_from, &cmap);
@@ -1172,10 +1155,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		if (copy_from_user(&var, argp, sizeof(var)))
 			return -EFAULT;
 		console_lock();
-		if (!lock_fb_info(info)) {
-			console_unlock();
-			return -ENODEV;
-		}
+		lock_fb_info(info);
 		ret = fb_pan_display(info, &var);
 		unlock_fb_info(info);
 		console_unlock();
@@ -1192,8 +1172,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 			return -EINVAL;
 		con2fb.framebuffer = -1;
 		event.data = &con2fb;
-		if (!lock_fb_info(info))
-			return -ENODEV;
+		lock_fb_info(info);
 		event.info = info;
 		fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
 		unlock_fb_info(info);
@@ -1214,10 +1193,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		}
 		event.data = &con2fb;
 		console_lock();
-		if (!lock_fb_info(info)) {
-			console_unlock();
-			return -ENODEV;
-		}
+		lock_fb_info(info);
 		event.info = info;
 		ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event);
 		unlock_fb_info(info);
@@ -1225,10 +1201,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		break;
 	case FBIOBLANK:
 		console_lock();
-		if (!lock_fb_info(info)) {
-			console_unlock();
-			return -ENODEV;
-		}
+		lock_fb_info(info);
 		info->flags |= FBINFO_MISC_USEREVENT;
 		ret = fb_blank(info, arg);
 		info->flags &= ~FBINFO_MISC_USEREVENT;
@@ -1236,8 +1209,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		console_unlock();
 		break;
 	default:
-		if (!lock_fb_info(info))
-			return -ENODEV;
+		lock_fb_info(info);
 		fb = info->fbops;
 		if (fb->fb_ioctl)
 			ret = fb->fb_ioctl(info, cmd, arg);
@@ -1357,8 +1329,7 @@ static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
 {
 	struct fb_fix_screeninfo fix;
 
-	if (!lock_fb_info(info))
-		return -ENODEV;
+	lock_fb_info(info);
 	fix = info->fix;
 	if (info->flags & FBINFO_HIDE_SMEM_START)
 		fix.smem_start = 0;
@@ -1418,8 +1389,6 @@ fb_mmap(struct file *file, struct vm_area_struct * vma)
 	if (!info)
 		return -ENODEV;
 	fb = info->fbops;
-	if (!fb)
-		return -ENODEV;
 	mutex_lock(&info->mm_lock);
 	if (fb->fb_mmap) {
 		int res;
@@ -1483,7 +1452,7 @@ __releases(&info->lock)
 	if (IS_ERR(info))
 		return PTR_ERR(info);
 
-	mutex_lock(&info->lock);
+	lock_fb_info(info);
 	if (!try_module_get(info->fbops->owner)) {
 		res = -ENODEV;
 		goto out;
@@ -1499,7 +1468,7 @@ __releases(&info->lock)
 		fb_deferred_io_open(info, inode, file);
 #endif
 out:
-	mutex_unlock(&info->lock);
+	unlock_fb_info(info);
 	if (res)
 		put_fb_info(info);
 	return res;
@@ -1512,11 +1481,11 @@ __releases(&info->lock)
 {
 	struct fb_info * const info = file->private_data;
 
-	mutex_lock(&info->lock);
+	lock_fb_info(info);
 	if (info->fbops->fb_release)
 		info->fbops->fb_release(info,1);
 	module_put(info->fbops->owner);
-	mutex_unlock(&info->lock);
+	unlock_fb_info(info);
 	put_fb_info(info);
 	return 0;
 }
@@ -1734,14 +1703,10 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 		console_lock();
 	else
 		atomic_inc(&ignore_console_lock_warning);
-	if (!lock_fb_info(fb_info)) {
-		ret = -ENODEV;
-		goto unlock_console;
-	}
-
+	lock_fb_info(fb_info);
 	ret = fbcon_fb_registered(fb_info);
 	unlock_fb_info(fb_info);
-unlock_console:
+
 	if (!lockless_register_fb)
 		console_unlock();
 	else
@@ -1759,11 +1724,7 @@ static int unbind_console(struct fb_info *fb_info)
 		return -EINVAL;
 
 	console_lock();
-	if (!lock_fb_info(fb_info)) {
-		console_unlock();
-		return -ENODEV;
-	}
-
+	lock_fb_info(fb_info);
 	event.info = fb_info;
 	ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
 	unlock_fb_info(fb_info);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 288175fafaf6..aa8f18163151 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -663,7 +663,10 @@ extern struct class *fb_class;
 	for (i = 0; i < FB_MAX; i++)		\
 		if (!registered_fb[i]) {} else
 
-extern int lock_fb_info(struct fb_info *info);
+static inline void lock_fb_info(struct fb_info *info)
+{
+	mutex_lock(&info->lock);
+}
 
 static inline void unlock_fb_info(struct fb_info *info)
 {
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 17/33] fbcon: call fbcon_fb_bind directly
  2019-05-28  9:02 ` Daniel Vetter
  (?)
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Sergey Senozhatsky, Peter Rosin, Kees Cook, Konstantin Khorenko,
	Yisheng Xie, Michał Mirosław, Mikulas Patocka,
	Thomas Zimmermann

Also remove the error return value. That's all errors for either
driver bugs (trying to unbind something that isn't bound), or errors
of the new driver that will take over.

There's nothing the outgoing driver can do about this anyway, so
switch over to void.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Peter Rosin <peda@axentia.se>
Cc: Kees Cook <keescook@chromium.org>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/core/fbcon.c | 24 +++++++-----------------
 drivers/video/fbdev/core/fbmem.c |  7 ++-----
 include/linux/fb.h               |  2 --
 include/linux/fbcon.h            |  2 ++
 4 files changed, 11 insertions(+), 24 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index a7e2d5b88914..142686953b71 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3046,7 +3046,7 @@ static int fbcon_mode_deleted(struct fb_info *info,
 }
 
 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
-static int fbcon_unbind(void)
+static void fbcon_unbind(void)
 {
 	int ret;
 
@@ -3055,25 +3055,21 @@ static int fbcon_unbind(void)
 
 	if (!ret)
 		fbcon_has_console_bind = 0;
-
-	return ret;
 }
 #else
-static inline int fbcon_unbind(void)
-{
-	return -EINVAL;
-}
+static inline void fbcon_unbind(void) {}
 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
 
 /* called with console_lock held */
-static int fbcon_fb_unbind(int idx)
+void fbcon_fb_unbind(struct fb_info *info)
 {
 	int i, new_idx = -1, ret = 0;
+	int idx = info->node;
 
 	WARN_CONSOLE_UNLOCKED();
 
 	if (!fbcon_has_console_bind)
-		return 0;
+		return;
 
 	for (i = first_fb_vc; i <= last_fb_vc; i++) {
 		if (con2fb_map[i] != idx &&
@@ -3106,15 +3102,13 @@ static int fbcon_fb_unbind(int idx)
 								     idx, 0);
 					if (ret) {
 						con2fb_map[i] = idx;
-						return ret;
+						return;
 					}
 				}
 			}
 		}
-		ret = fbcon_unbind();
+		fbcon_unbind();
 	}
-
-	return ret;
 }
 
 /* called with console_lock held */
@@ -3352,10 +3346,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 		mode = event->data;
 		ret = fbcon_mode_deleted(info, mode);
 		break;
-	case FB_EVENT_FB_UNBIND:
-		idx = info->node;
-		ret = fbcon_fb_unbind(idx);
-		break;
 	case FB_EVENT_SET_CONSOLE_MAP:
 		/* called with console lock held */
 		con2fb = event->data;
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index d73762324ca2..f3fc2e5b193c 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1716,8 +1716,6 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 
 static int unbind_console(struct fb_info *fb_info)
 {
-	struct fb_event event;
-	int ret;
 	int i = fb_info->node;
 
 	if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
@@ -1725,12 +1723,11 @@ static int unbind_console(struct fb_info *fb_info)
 
 	console_lock();
 	lock_fb_info(fb_info);
-	event.info = fb_info;
-	ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
+	fbcon_fb_unbind(fb_info);
 	unlock_fb_info(fb_info);
 	console_unlock();
 
-	return ret;
+	return 0;
 }
 
 static int __unlink_framebuffer(struct fb_info *fb_info);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index aa8f18163151..b6ce041d9e13 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -158,8 +158,6 @@ struct fb_cursor_user {
 #define FB_EVENT_CONBLANK               0x0C
 /*      Get drawing requirements        */
 #define FB_EVENT_GET_REQ                0x0D
-/*      Unbind from the console if possible */
-#define FB_EVENT_FB_UNBIND              0x0E
 /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
 #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
 /*      A hardware display blank early change occurred */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index 94a71e9e1257..38d44fdb6d14 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -6,11 +6,13 @@ void __init fb_console_init(void);
 void __exit fb_console_exit(void);
 int fbcon_fb_registered(struct fb_info *info);
 void fbcon_fb_unregistered(struct fb_info *info);
+void fbcon_fb_unbind(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
 static inline int fbcon_fb_registered(struct fb_info *info) { return 0; }
 static inline void fbcon_fb_unregistered(struct fb_info *info) {}
+static inline void fbcon_fb_unbind(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 17/33] fbcon: call fbcon_fb_bind directly
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Sergey Senozhatsky, Kees Cook,
	Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Michał Mirosław, Yisheng Xie, Hans de Goede,
	Mikulas Patocka, Thomas Zimmermann, Daniel Vetter, Sam Ravnborg,
	Peter Rosin, Konstantin Khorenko

Also remove the error return value. That's all errors for either
driver bugs (trying to unbind something that isn't bound), or errors
of the new driver that will take over.

There's nothing the outgoing driver can do about this anyway, so
switch over to void.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Peter Rosin <peda@axentia.se>
Cc: Kees Cook <keescook@chromium.org>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/core/fbcon.c | 24 +++++++-----------------
 drivers/video/fbdev/core/fbmem.c |  7 ++-----
 include/linux/fb.h               |  2 --
 include/linux/fbcon.h            |  2 ++
 4 files changed, 11 insertions(+), 24 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index a7e2d5b88914..142686953b71 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3046,7 +3046,7 @@ static int fbcon_mode_deleted(struct fb_info *info,
 }
 
 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
-static int fbcon_unbind(void)
+static void fbcon_unbind(void)
 {
 	int ret;
 
@@ -3055,25 +3055,21 @@ static int fbcon_unbind(void)
 
 	if (!ret)
 		fbcon_has_console_bind = 0;
-
-	return ret;
 }
 #else
-static inline int fbcon_unbind(void)
-{
-	return -EINVAL;
-}
+static inline void fbcon_unbind(void) {}
 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
 
 /* called with console_lock held */
-static int fbcon_fb_unbind(int idx)
+void fbcon_fb_unbind(struct fb_info *info)
 {
 	int i, new_idx = -1, ret = 0;
+	int idx = info->node;
 
 	WARN_CONSOLE_UNLOCKED();
 
 	if (!fbcon_has_console_bind)
-		return 0;
+		return;
 
 	for (i = first_fb_vc; i <= last_fb_vc; i++) {
 		if (con2fb_map[i] != idx &&
@@ -3106,15 +3102,13 @@ static int fbcon_fb_unbind(int idx)
 								     idx, 0);
 					if (ret) {
 						con2fb_map[i] = idx;
-						return ret;
+						return;
 					}
 				}
 			}
 		}
-		ret = fbcon_unbind();
+		fbcon_unbind();
 	}
-
-	return ret;
 }
 
 /* called with console_lock held */
@@ -3352,10 +3346,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 		mode = event->data;
 		ret = fbcon_mode_deleted(info, mode);
 		break;
-	case FB_EVENT_FB_UNBIND:
-		idx = info->node;
-		ret = fbcon_fb_unbind(idx);
-		break;
 	case FB_EVENT_SET_CONSOLE_MAP:
 		/* called with console lock held */
 		con2fb = event->data;
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index d73762324ca2..f3fc2e5b193c 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1716,8 +1716,6 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 
 static int unbind_console(struct fb_info *fb_info)
 {
-	struct fb_event event;
-	int ret;
 	int i = fb_info->node;
 
 	if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
@@ -1725,12 +1723,11 @@ static int unbind_console(struct fb_info *fb_info)
 
 	console_lock();
 	lock_fb_info(fb_info);
-	event.info = fb_info;
-	ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
+	fbcon_fb_unbind(fb_info);
 	unlock_fb_info(fb_info);
 	console_unlock();
 
-	return ret;
+	return 0;
 }
 
 static int __unlink_framebuffer(struct fb_info *fb_info);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index aa8f18163151..b6ce041d9e13 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -158,8 +158,6 @@ struct fb_cursor_user {
 #define FB_EVENT_CONBLANK               0x0C
 /*      Get drawing requirements        */
 #define FB_EVENT_GET_REQ                0x0D
-/*      Unbind from the console if possible */
-#define FB_EVENT_FB_UNBIND              0x0E
 /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
 #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
 /*      A hardware display blank early change occurred */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index 94a71e9e1257..38d44fdb6d14 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -6,11 +6,13 @@ void __init fb_console_init(void);
 void __exit fb_console_exit(void);
 int fbcon_fb_registered(struct fb_info *info);
 void fbcon_fb_unregistered(struct fb_info *info);
+void fbcon_fb_unbind(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
 static inline int fbcon_fb_registered(struct fb_info *info) { return 0; }
 static inline void fbcon_fb_unregistered(struct fb_info *info) {}
+static inline void fbcon_fb_unbind(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 17/33] fbcon: call fbcon_fb_bind directly
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Sergey Senozhatsky, Kees Cook,
	Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Michał Mirosław, Yisheng Xie, Hans de Goede,
	Mikulas Patocka, Thomas Zimmermann, Daniel Vetter, Sam Ravnborg,
	Peter Rosin, Konstantin Khorenko

Also remove the error return value. That's all errors for either
driver bugs (trying to unbind something that isn't bound), or errors
of the new driver that will take over.

There's nothing the outgoing driver can do about this anyway, so
switch over to void.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Peter Rosin <peda@axentia.se>
Cc: Kees Cook <keescook@chromium.org>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/core/fbcon.c | 24 +++++++-----------------
 drivers/video/fbdev/core/fbmem.c |  7 ++-----
 include/linux/fb.h               |  2 --
 include/linux/fbcon.h            |  2 ++
 4 files changed, 11 insertions(+), 24 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index a7e2d5b88914..142686953b71 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3046,7 +3046,7 @@ static int fbcon_mode_deleted(struct fb_info *info,
 }
 
 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
-static int fbcon_unbind(void)
+static void fbcon_unbind(void)
 {
 	int ret;
 
@@ -3055,25 +3055,21 @@ static int fbcon_unbind(void)
 
 	if (!ret)
 		fbcon_has_console_bind = 0;
-
-	return ret;
 }
 #else
-static inline int fbcon_unbind(void)
-{
-	return -EINVAL;
-}
+static inline void fbcon_unbind(void) {}
 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
 
 /* called with console_lock held */
-static int fbcon_fb_unbind(int idx)
+void fbcon_fb_unbind(struct fb_info *info)
 {
 	int i, new_idx = -1, ret = 0;
+	int idx = info->node;
 
 	WARN_CONSOLE_UNLOCKED();
 
 	if (!fbcon_has_console_bind)
-		return 0;
+		return;
 
 	for (i = first_fb_vc; i <= last_fb_vc; i++) {
 		if (con2fb_map[i] != idx &&
@@ -3106,15 +3102,13 @@ static int fbcon_fb_unbind(int idx)
 								     idx, 0);
 					if (ret) {
 						con2fb_map[i] = idx;
-						return ret;
+						return;
 					}
 				}
 			}
 		}
-		ret = fbcon_unbind();
+		fbcon_unbind();
 	}
-
-	return ret;
 }
 
 /* called with console_lock held */
@@ -3352,10 +3346,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 		mode = event->data;
 		ret = fbcon_mode_deleted(info, mode);
 		break;
-	case FB_EVENT_FB_UNBIND:
-		idx = info->node;
-		ret = fbcon_fb_unbind(idx);
-		break;
 	case FB_EVENT_SET_CONSOLE_MAP:
 		/* called with console lock held */
 		con2fb = event->data;
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index d73762324ca2..f3fc2e5b193c 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1716,8 +1716,6 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 
 static int unbind_console(struct fb_info *fb_info)
 {
-	struct fb_event event;
-	int ret;
 	int i = fb_info->node;
 
 	if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
@@ -1725,12 +1723,11 @@ static int unbind_console(struct fb_info *fb_info)
 
 	console_lock();
 	lock_fb_info(fb_info);
-	event.info = fb_info;
-	ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
+	fbcon_fb_unbind(fb_info);
 	unlock_fb_info(fb_info);
 	console_unlock();
 
-	return ret;
+	return 0;
 }
 
 static int __unlink_framebuffer(struct fb_info *fb_info);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index aa8f18163151..b6ce041d9e13 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -158,8 +158,6 @@ struct fb_cursor_user {
 #define FB_EVENT_CONBLANK               0x0C
 /*      Get drawing requirements        */
 #define FB_EVENT_GET_REQ                0x0D
-/*      Unbind from the console if possible */
-#define FB_EVENT_FB_UNBIND              0x0E
 /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
 #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
 /*      A hardware display blank early change occurred */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index 94a71e9e1257..38d44fdb6d14 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -6,11 +6,13 @@ void __init fb_console_init(void);
 void __exit fb_console_exit(void);
 int fbcon_fb_registered(struct fb_info *info);
 void fbcon_fb_unregistered(struct fb_info *info);
+void fbcon_fb_unbind(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
 static inline int fbcon_fb_registered(struct fb_info *info) { return 0; }
 static inline void fbcon_fb_unregistered(struct fb_info *info) {}
+static inline void fbcon_fb_unbind(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 18/33] fbdev: make unregister/unlink functions not fail
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst,
	Michał Mirosław, Peter Rosin, Hans de Goede,
	Mikulas Patocka

Except for driver bugs (which we'll catch with a WARN_ON) this is only
to report failures of the new driver taking over the console. There's
nothing the outgoing driver can do about that, and no one ever
bothered to actually look at these return values. So remove them all.

v2: fixup unregister_framebuffer in savagefb, fbtft, ivtvfb, and neofb
drivers, reported by kbuild.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/media/pci/ivtv/ivtvfb.c              |  6 +-
 drivers/staging/fbtft/fbtft-core.c           |  4 +-
 drivers/video/fbdev/core/fbmem.c             | 73 ++++++--------------
 drivers/video/fbdev/neofb.c                  |  9 +--
 drivers/video/fbdev/savage/savagefb_driver.c |  9 +--
 include/linux/fb.h                           |  4 +-
 6 files changed, 31 insertions(+), 74 deletions(-)

diff --git a/drivers/media/pci/ivtv/ivtvfb.c b/drivers/media/pci/ivtv/ivtvfb.c
index cfd21040d0e3..6435c72ff58e 100644
--- a/drivers/media/pci/ivtv/ivtvfb.c
+++ b/drivers/media/pci/ivtv/ivtvfb.c
@@ -1258,11 +1258,7 @@ static int ivtvfb_callback_cleanup(struct device *dev, void *p)
 	struct osd_info *oi = itv->osd_info;
 
 	if (itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT) {
-		if (unregister_framebuffer(&itv->osd_info->ivtvfb_info)) {
-			IVTVFB_WARN("Framebuffer %d is in use, cannot unload\n",
-				       itv->instance);
-			return 0;
-		}
+		unregister_framebuffer(&itv->osd_info->ivtvfb_info);
 		IVTVFB_INFO("Unregister framebuffer %d\n", itv->instance);
 		itv->ivtvfb_restore = NULL;
 		ivtvfb_blank(FB_BLANK_VSYNC_SUSPEND, &oi->ivtvfb_info);
diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/fbtft/fbtft-core.c
index 9b07badf4c6c..7cbc1bdd2d8a 100644
--- a/drivers/staging/fbtft/fbtft-core.c
+++ b/drivers/staging/fbtft/fbtft-core.c
@@ -891,7 +891,9 @@ int fbtft_unregister_framebuffer(struct fb_info *fb_info)
 	if (par->fbtftops.unregister_backlight)
 		par->fbtftops.unregister_backlight(par);
 	fbtft_sysfs_exit(par);
-	return unregister_framebuffer(fb_info);
+	unregister_framebuffer(fb_info);
+
+	return 0;
 }
 EXPORT_SYMBOL(fbtft_unregister_framebuffer);
 
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index f3fc2e5b193c..f3bcad30d3ba 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1590,13 +1590,13 @@ static bool fb_do_apertures_overlap(struct apertures_struct *gena,
 	return false;
 }
 
-static int do_unregister_framebuffer(struct fb_info *fb_info);
+static void do_unregister_framebuffer(struct fb_info *fb_info);
 
 #define VGA_FB_PHYS 0xA0000
-static int do_remove_conflicting_framebuffers(struct apertures_struct *a,
-					      const char *name, bool primary)
+static void do_remove_conflicting_framebuffers(struct apertures_struct *a,
+					       const char *name, bool primary)
 {
-	int i, ret;
+	int i;
 
 	/* check all firmware fbs and kick off if the base addr overlaps */
 	for_each_registered_fb(i) {
@@ -1612,13 +1612,9 @@ static int do_remove_conflicting_framebuffers(struct apertures_struct *a,
 
 			printk(KERN_INFO "fb%d: switching to %s from %s\n",
 			       i, name, registered_fb[i]->fix.id);
-			ret = do_unregister_framebuffer(registered_fb[i]);
-			if (ret)
-				return ret;
+			do_unregister_framebuffer(registered_fb[i]);
 		}
 	}
-
-	return 0;
 }
 
 static bool lockless_register_fb;
@@ -1634,11 +1630,9 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 	if (fb_check_foreignness(fb_info))
 		return -ENOSYS;
 
-	ret = do_remove_conflicting_framebuffers(fb_info->apertures,
-						 fb_info->fix.id,
-						 fb_is_primary_device(fb_info));
-	if (ret)
-		return ret;
+	do_remove_conflicting_framebuffers(fb_info->apertures,
+					   fb_info->fix.id,
+					   fb_is_primary_device(fb_info));
 
 	if (num_registered_fb == FB_MAX)
 		return -ENXIO;
@@ -1714,32 +1708,25 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 	return ret;
 }
 
-static int unbind_console(struct fb_info *fb_info)
+static void unbind_console(struct fb_info *fb_info)
 {
 	int i = fb_info->node;
 
-	if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
-		return -EINVAL;
+	if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
+		return;
 
 	console_lock();
 	lock_fb_info(fb_info);
 	fbcon_fb_unbind(fb_info);
 	unlock_fb_info(fb_info);
 	console_unlock();
-
-	return 0;
 }
 
-static int __unlink_framebuffer(struct fb_info *fb_info);
+static void __unlink_framebuffer(struct fb_info *fb_info);
 
-static int do_unregister_framebuffer(struct fb_info *fb_info)
+static void do_unregister_framebuffer(struct fb_info *fb_info)
 {
-	int ret;
-
-	ret = unbind_console(fb_info);
-
-	if (ret)
-		return -EINVAL;
+	unbind_console(fb_info);
 
 	pm_vt_switch_unregister(fb_info->dev);
 
@@ -1764,36 +1751,27 @@ static int do_unregister_framebuffer(struct fb_info *fb_info)
 
 	/* this may free fb info */
 	put_fb_info(fb_info);
-	return 0;
 }
 
-static int __unlink_framebuffer(struct fb_info *fb_info)
+static void __unlink_framebuffer(struct fb_info *fb_info)
 {
 	int i;
 
 	i = fb_info->node;
-	if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
-		return -EINVAL;
+	if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
+		return;
 
 	if (fb_info->dev) {
 		device_destroy(fb_class, MKDEV(FB_MAJOR, i));
 		fb_info->dev = NULL;
 	}
-
-	return 0;
 }
 
-int unlink_framebuffer(struct fb_info *fb_info)
+void unlink_framebuffer(struct fb_info *fb_info)
 {
-	int ret;
-
-	ret = __unlink_framebuffer(fb_info);
-	if (ret)
-		return ret;
+	__unlink_framebuffer(fb_info);
 
 	unbind_console(fb_info);
-
-	return 0;
 }
 EXPORT_SYMBOL(unlink_framebuffer);
 
@@ -1810,7 +1788,6 @@ EXPORT_SYMBOL(unlink_framebuffer);
 int remove_conflicting_framebuffers(struct apertures_struct *a,
 				    const char *name, bool primary)
 {
-	int ret;
 	bool do_free = false;
 
 	if (!a) {
@@ -1824,13 +1801,13 @@ int remove_conflicting_framebuffers(struct apertures_struct *a,
 	}
 
 	mutex_lock(&registration_lock);
-	ret = do_remove_conflicting_framebuffers(a, name, primary);
+	do_remove_conflicting_framebuffers(a, name, primary);
 	mutex_unlock(&registration_lock);
 
 	if (do_free)
 		kfree(a);
 
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL(remove_conflicting_framebuffers);
 
@@ -1927,16 +1904,12 @@ EXPORT_SYMBOL(register_framebuffer);
  *      that the driver implements fb_open() and fb_release() to
  *      check that no processes are using the device.
  */
-int
+void
 unregister_framebuffer(struct fb_info *fb_info)
 {
-	int ret;
-
 	mutex_lock(&registration_lock);
-	ret = do_unregister_framebuffer(fb_info);
+	do_unregister_framebuffer(fb_info);
 	mutex_unlock(&registration_lock);
-
-	return ret;
 }
 EXPORT_SYMBOL(unregister_framebuffer);
 
diff --git a/drivers/video/fbdev/neofb.c b/drivers/video/fbdev/neofb.c
index 5d3a444083f7..b770946a0920 100644
--- a/drivers/video/fbdev/neofb.c
+++ b/drivers/video/fbdev/neofb.c
@@ -2122,14 +2122,7 @@ static void neofb_remove(struct pci_dev *dev)
 	DBG("neofb_remove");
 
 	if (info) {
-		/*
-		 * If unregister_framebuffer fails, then
-		 * we will be leaving hooks that could cause
-		 * oopsen laying around.
-		 */
-		if (unregister_framebuffer(info))
-			printk(KERN_WARNING
-			       "neofb: danger danger!  Oopsen imminent!\n");
+		unregister_framebuffer(info);
 
 		neo_unmap_video(info);
 		fb_destroy_modedb(info->monspecs.modedb);
diff --git a/drivers/video/fbdev/savage/savagefb_driver.c b/drivers/video/fbdev/savage/savagefb_driver.c
index 47b78f0138c3..512789f5f884 100644
--- a/drivers/video/fbdev/savage/savagefb_driver.c
+++ b/drivers/video/fbdev/savage/savagefb_driver.c
@@ -2333,14 +2333,7 @@ static void savagefb_remove(struct pci_dev *dev)
 	DBG("savagefb_remove");
 
 	if (info) {
-		/*
-		 * If unregister_framebuffer fails, then
-		 * we will be leaving hooks that could cause
-		 * oopsen laying around.
-		 */
-		if (unregister_framebuffer(info))
-			printk(KERN_WARNING "savagefb: danger danger! "
-			       "Oopsen imminent!\n");
+		unregister_framebuffer(info);
 
 #ifdef CONFIG_FB_SAVAGE_I2C
 		savagefb_delete_i2c_busses(info);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index b6ce041d9e13..b90cf7d56bd8 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -634,8 +634,8 @@ extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
 
 /* drivers/video/fbmem.c */
 extern int register_framebuffer(struct fb_info *fb_info);
-extern int unregister_framebuffer(struct fb_info *fb_info);
-extern int unlink_framebuffer(struct fb_info *fb_info);
+extern void unregister_framebuffer(struct fb_info *fb_info);
+extern void unlink_framebuffer(struct fb_info *fb_info);
 extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int res_id,
 					       const char *name);
 extern int remove_conflicting_framebuffers(struct apertures_struct *a,
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 18/33] fbdev: make unregister/unlink functions not fail
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst,
	Michał Mirosław, Peter Rosin, Hans de Goede,
	Mikulas Patocka

Except for driver bugs (which we'll catch with a WARN_ON) this is only
to report failures of the new driver taking over the console. There's
nothing the outgoing driver can do about that, and no one ever
bothered to actually look at these return values. So remove them all.

v2: fixup unregister_framebuffer in savagefb, fbtft, ivtvfb, and neofb
drivers, reported by kbuild.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/media/pci/ivtv/ivtvfb.c              |  6 +-
 drivers/staging/fbtft/fbtft-core.c           |  4 +-
 drivers/video/fbdev/core/fbmem.c             | 73 ++++++--------------
 drivers/video/fbdev/neofb.c                  |  9 +--
 drivers/video/fbdev/savage/savagefb_driver.c |  9 +--
 include/linux/fb.h                           |  4 +-
 6 files changed, 31 insertions(+), 74 deletions(-)

diff --git a/drivers/media/pci/ivtv/ivtvfb.c b/drivers/media/pci/ivtv/ivtvfb.c
index cfd21040d0e3..6435c72ff58e 100644
--- a/drivers/media/pci/ivtv/ivtvfb.c
+++ b/drivers/media/pci/ivtv/ivtvfb.c
@@ -1258,11 +1258,7 @@ static int ivtvfb_callback_cleanup(struct device *dev, void *p)
 	struct osd_info *oi = itv->osd_info;
 
 	if (itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT) {
-		if (unregister_framebuffer(&itv->osd_info->ivtvfb_info)) {
-			IVTVFB_WARN("Framebuffer %d is in use, cannot unload\n",
-				       itv->instance);
-			return 0;
-		}
+		unregister_framebuffer(&itv->osd_info->ivtvfb_info);
 		IVTVFB_INFO("Unregister framebuffer %d\n", itv->instance);
 		itv->ivtvfb_restore = NULL;
 		ivtvfb_blank(FB_BLANK_VSYNC_SUSPEND, &oi->ivtvfb_info);
diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/fbtft/fbtft-core.c
index 9b07badf4c6c..7cbc1bdd2d8a 100644
--- a/drivers/staging/fbtft/fbtft-core.c
+++ b/drivers/staging/fbtft/fbtft-core.c
@@ -891,7 +891,9 @@ int fbtft_unregister_framebuffer(struct fb_info *fb_info)
 	if (par->fbtftops.unregister_backlight)
 		par->fbtftops.unregister_backlight(par);
 	fbtft_sysfs_exit(par);
-	return unregister_framebuffer(fb_info);
+	unregister_framebuffer(fb_info);
+
+	return 0;
 }
 EXPORT_SYMBOL(fbtft_unregister_framebuffer);
 
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index f3fc2e5b193c..f3bcad30d3ba 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1590,13 +1590,13 @@ static bool fb_do_apertures_overlap(struct apertures_struct *gena,
 	return false;
 }
 
-static int do_unregister_framebuffer(struct fb_info *fb_info);
+static void do_unregister_framebuffer(struct fb_info *fb_info);
 
 #define VGA_FB_PHYS 0xA0000
-static int do_remove_conflicting_framebuffers(struct apertures_struct *a,
-					      const char *name, bool primary)
+static void do_remove_conflicting_framebuffers(struct apertures_struct *a,
+					       const char *name, bool primary)
 {
-	int i, ret;
+	int i;
 
 	/* check all firmware fbs and kick off if the base addr overlaps */
 	for_each_registered_fb(i) {
@@ -1612,13 +1612,9 @@ static int do_remove_conflicting_framebuffers(struct apertures_struct *a,
 
 			printk(KERN_INFO "fb%d: switching to %s from %s\n",
 			       i, name, registered_fb[i]->fix.id);
-			ret = do_unregister_framebuffer(registered_fb[i]);
-			if (ret)
-				return ret;
+			do_unregister_framebuffer(registered_fb[i]);
 		}
 	}
-
-	return 0;
 }
 
 static bool lockless_register_fb;
@@ -1634,11 +1630,9 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 	if (fb_check_foreignness(fb_info))
 		return -ENOSYS;
 
-	ret = do_remove_conflicting_framebuffers(fb_info->apertures,
-						 fb_info->fix.id,
-						 fb_is_primary_device(fb_info));
-	if (ret)
-		return ret;
+	do_remove_conflicting_framebuffers(fb_info->apertures,
+					   fb_info->fix.id,
+					   fb_is_primary_device(fb_info));
 
 	if (num_registered_fb = FB_MAX)
 		return -ENXIO;
@@ -1714,32 +1708,25 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 	return ret;
 }
 
-static int unbind_console(struct fb_info *fb_info)
+static void unbind_console(struct fb_info *fb_info)
 {
 	int i = fb_info->node;
 
-	if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
-		return -EINVAL;
+	if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
+		return;
 
 	console_lock();
 	lock_fb_info(fb_info);
 	fbcon_fb_unbind(fb_info);
 	unlock_fb_info(fb_info);
 	console_unlock();
-
-	return 0;
 }
 
-static int __unlink_framebuffer(struct fb_info *fb_info);
+static void __unlink_framebuffer(struct fb_info *fb_info);
 
-static int do_unregister_framebuffer(struct fb_info *fb_info)
+static void do_unregister_framebuffer(struct fb_info *fb_info)
 {
-	int ret;
-
-	ret = unbind_console(fb_info);
-
-	if (ret)
-		return -EINVAL;
+	unbind_console(fb_info);
 
 	pm_vt_switch_unregister(fb_info->dev);
 
@@ -1764,36 +1751,27 @@ static int do_unregister_framebuffer(struct fb_info *fb_info)
 
 	/* this may free fb info */
 	put_fb_info(fb_info);
-	return 0;
 }
 
-static int __unlink_framebuffer(struct fb_info *fb_info)
+static void __unlink_framebuffer(struct fb_info *fb_info)
 {
 	int i;
 
 	i = fb_info->node;
-	if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
-		return -EINVAL;
+	if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
+		return;
 
 	if (fb_info->dev) {
 		device_destroy(fb_class, MKDEV(FB_MAJOR, i));
 		fb_info->dev = NULL;
 	}
-
-	return 0;
 }
 
-int unlink_framebuffer(struct fb_info *fb_info)
+void unlink_framebuffer(struct fb_info *fb_info)
 {
-	int ret;
-
-	ret = __unlink_framebuffer(fb_info);
-	if (ret)
-		return ret;
+	__unlink_framebuffer(fb_info);
 
 	unbind_console(fb_info);
-
-	return 0;
 }
 EXPORT_SYMBOL(unlink_framebuffer);
 
@@ -1810,7 +1788,6 @@ EXPORT_SYMBOL(unlink_framebuffer);
 int remove_conflicting_framebuffers(struct apertures_struct *a,
 				    const char *name, bool primary)
 {
-	int ret;
 	bool do_free = false;
 
 	if (!a) {
@@ -1824,13 +1801,13 @@ int remove_conflicting_framebuffers(struct apertures_struct *a,
 	}
 
 	mutex_lock(&registration_lock);
-	ret = do_remove_conflicting_framebuffers(a, name, primary);
+	do_remove_conflicting_framebuffers(a, name, primary);
 	mutex_unlock(&registration_lock);
 
 	if (do_free)
 		kfree(a);
 
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL(remove_conflicting_framebuffers);
 
@@ -1927,16 +1904,12 @@ EXPORT_SYMBOL(register_framebuffer);
  *      that the driver implements fb_open() and fb_release() to
  *      check that no processes are using the device.
  */
-int
+void
 unregister_framebuffer(struct fb_info *fb_info)
 {
-	int ret;
-
 	mutex_lock(&registration_lock);
-	ret = do_unregister_framebuffer(fb_info);
+	do_unregister_framebuffer(fb_info);
 	mutex_unlock(&registration_lock);
-
-	return ret;
 }
 EXPORT_SYMBOL(unregister_framebuffer);
 
diff --git a/drivers/video/fbdev/neofb.c b/drivers/video/fbdev/neofb.c
index 5d3a444083f7..b770946a0920 100644
--- a/drivers/video/fbdev/neofb.c
+++ b/drivers/video/fbdev/neofb.c
@@ -2122,14 +2122,7 @@ static void neofb_remove(struct pci_dev *dev)
 	DBG("neofb_remove");
 
 	if (info) {
-		/*
-		 * If unregister_framebuffer fails, then
-		 * we will be leaving hooks that could cause
-		 * oopsen laying around.
-		 */
-		if (unregister_framebuffer(info))
-			printk(KERN_WARNING
-			       "neofb: danger danger!  Oopsen imminent!\n");
+		unregister_framebuffer(info);
 
 		neo_unmap_video(info);
 		fb_destroy_modedb(info->monspecs.modedb);
diff --git a/drivers/video/fbdev/savage/savagefb_driver.c b/drivers/video/fbdev/savage/savagefb_driver.c
index 47b78f0138c3..512789f5f884 100644
--- a/drivers/video/fbdev/savage/savagefb_driver.c
+++ b/drivers/video/fbdev/savage/savagefb_driver.c
@@ -2333,14 +2333,7 @@ static void savagefb_remove(struct pci_dev *dev)
 	DBG("savagefb_remove");
 
 	if (info) {
-		/*
-		 * If unregister_framebuffer fails, then
-		 * we will be leaving hooks that could cause
-		 * oopsen laying around.
-		 */
-		if (unregister_framebuffer(info))
-			printk(KERN_WARNING "savagefb: danger danger! "
-			       "Oopsen imminent!\n");
+		unregister_framebuffer(info);
 
 #ifdef CONFIG_FB_SAVAGE_I2C
 		savagefb_delete_i2c_busses(info);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index b6ce041d9e13..b90cf7d56bd8 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -634,8 +634,8 @@ extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
 
 /* drivers/video/fbmem.c */
 extern int register_framebuffer(struct fb_info *fb_info);
-extern int unregister_framebuffer(struct fb_info *fb_info);
-extern int unlink_framebuffer(struct fb_info *fb_info);
+extern void unregister_framebuffer(struct fb_info *fb_info);
+extern void unlink_framebuffer(struct fb_info *fb_info);
 extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int res_id,
 					       const char *name);
 extern int remove_conflicting_framebuffers(struct apertures_struct *a,
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 19/33] fbdev: unify unlink_framebuffer paths
  2019-05-28  9:02 ` Daniel Vetter
  (?)
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst,
	Michał Mirosław, Peter Rosin, Hans de Goede,
	Mikulas Patocka

For some reasons the pm_vt_switch_unregister call was missing from the
direct unregister_framebuffer path. Fix this.

v2: fbinfo->dev is used to decided whether unlink_framebuffer has been
called already. I botched that in v1. Make this all clearer by
inlining __unlink_framebuffer.

v3: Fix typoe in subject (Maarten).

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
---
 drivers/video/fbdev/core/fbmem.c | 47 ++++++++++++++------------------
 1 file changed, 20 insertions(+), 27 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index f3bcad30d3ba..bee45e9405b8 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1722,15 +1722,30 @@ static void unbind_console(struct fb_info *fb_info)
 	console_unlock();
 }
 
-static void __unlink_framebuffer(struct fb_info *fb_info);
-
-static void do_unregister_framebuffer(struct fb_info *fb_info)
+void unlink_framebuffer(struct fb_info *fb_info)
 {
-	unbind_console(fb_info);
+	int i;
+
+	i = fb_info->node;
+	if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
+		return;
+
+	if (!fb_info->dev)
+		return;
+
+	device_destroy(fb_class, MKDEV(FB_MAJOR, i));
 
 	pm_vt_switch_unregister(fb_info->dev);
 
-	__unlink_framebuffer(fb_info);
+	unbind_console(fb_info);
+
+	fb_info->dev = NULL;
+}
+EXPORT_SYMBOL(unlink_framebuffer);
+
+static void do_unregister_framebuffer(struct fb_info *fb_info)
+{
+	unlink_framebuffer(fb_info);
 	if (fb_info->pixmap.addr &&
 	    (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
 		kfree(fb_info->pixmap.addr);
@@ -1753,28 +1768,6 @@ static void do_unregister_framebuffer(struct fb_info *fb_info)
 	put_fb_info(fb_info);
 }
 
-static void __unlink_framebuffer(struct fb_info *fb_info)
-{
-	int i;
-
-	i = fb_info->node;
-	if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
-		return;
-
-	if (fb_info->dev) {
-		device_destroy(fb_class, MKDEV(FB_MAJOR, i));
-		fb_info->dev = NULL;
-	}
-}
-
-void unlink_framebuffer(struct fb_info *fb_info)
-{
-	__unlink_framebuffer(fb_info);
-
-	unbind_console(fb_info);
-}
-EXPORT_SYMBOL(unlink_framebuffer);
-
 /**
  * remove_conflicting_framebuffers - remove firmware-configured framebuffers
  * @a: memory range, users of which are to be removed
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 19/33] fbdev: unify unlink_framebuffer paths
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Michał Mirosław, Mikulas Patocka, Daniel Vetter,
	Sam Ravnborg, Peter Rosin

For some reasons the pm_vt_switch_unregister call was missing from the
direct unregister_framebuffer path. Fix this.

v2: fbinfo->dev is used to decided whether unlink_framebuffer has been
called already. I botched that in v1. Make this all clearer by
inlining __unlink_framebuffer.

v3: Fix typoe in subject (Maarten).

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
---
 drivers/video/fbdev/core/fbmem.c | 47 ++++++++++++++------------------
 1 file changed, 20 insertions(+), 27 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index f3bcad30d3ba..bee45e9405b8 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1722,15 +1722,30 @@ static void unbind_console(struct fb_info *fb_info)
 	console_unlock();
 }
 
-static void __unlink_framebuffer(struct fb_info *fb_info);
-
-static void do_unregister_framebuffer(struct fb_info *fb_info)
+void unlink_framebuffer(struct fb_info *fb_info)
 {
-	unbind_console(fb_info);
+	int i;
+
+	i = fb_info->node;
+	if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
+		return;
+
+	if (!fb_info->dev)
+		return;
+
+	device_destroy(fb_class, MKDEV(FB_MAJOR, i));
 
 	pm_vt_switch_unregister(fb_info->dev);
 
-	__unlink_framebuffer(fb_info);
+	unbind_console(fb_info);
+
+	fb_info->dev = NULL;
+}
+EXPORT_SYMBOL(unlink_framebuffer);
+
+static void do_unregister_framebuffer(struct fb_info *fb_info)
+{
+	unlink_framebuffer(fb_info);
 	if (fb_info->pixmap.addr &&
 	    (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
 		kfree(fb_info->pixmap.addr);
@@ -1753,28 +1768,6 @@ static void do_unregister_framebuffer(struct fb_info *fb_info)
 	put_fb_info(fb_info);
 }
 
-static void __unlink_framebuffer(struct fb_info *fb_info)
-{
-	int i;
-
-	i = fb_info->node;
-	if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
-		return;
-
-	if (fb_info->dev) {
-		device_destroy(fb_class, MKDEV(FB_MAJOR, i));
-		fb_info->dev = NULL;
-	}
-}
-
-void unlink_framebuffer(struct fb_info *fb_info)
-{
-	__unlink_framebuffer(fb_info);
-
-	unbind_console(fb_info);
-}
-EXPORT_SYMBOL(unlink_framebuffer);
-
 /**
  * remove_conflicting_framebuffers - remove firmware-configured framebuffers
  * @a: memory range, users of which are to be removed
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 19/33] fbdev: unify unlink_framebuffer paths
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Michał Mirosław, Mikulas Patocka, Daniel Vetter,
	Sam Ravnborg, Peter Rosin

For some reasons the pm_vt_switch_unregister call was missing from the
direct unregister_framebuffer path. Fix this.

v2: fbinfo->dev is used to decided whether unlink_framebuffer has been
called already. I botched that in v1. Make this all clearer by
inlining __unlink_framebuffer.

v3: Fix typoe in subject (Maarten).

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
---
 drivers/video/fbdev/core/fbmem.c | 47 ++++++++++++++------------------
 1 file changed, 20 insertions(+), 27 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index f3bcad30d3ba..bee45e9405b8 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1722,15 +1722,30 @@ static void unbind_console(struct fb_info *fb_info)
 	console_unlock();
 }
 
-static void __unlink_framebuffer(struct fb_info *fb_info);
-
-static void do_unregister_framebuffer(struct fb_info *fb_info)
+void unlink_framebuffer(struct fb_info *fb_info)
 {
-	unbind_console(fb_info);
+	int i;
+
+	i = fb_info->node;
+	if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
+		return;
+
+	if (!fb_info->dev)
+		return;
+
+	device_destroy(fb_class, MKDEV(FB_MAJOR, i));
 
 	pm_vt_switch_unregister(fb_info->dev);
 
-	__unlink_framebuffer(fb_info);
+	unbind_console(fb_info);
+
+	fb_info->dev = NULL;
+}
+EXPORT_SYMBOL(unlink_framebuffer);
+
+static void do_unregister_framebuffer(struct fb_info *fb_info)
+{
+	unlink_framebuffer(fb_info);
 	if (fb_info->pixmap.addr &&
 	    (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
 		kfree(fb_info->pixmap.addr);
@@ -1753,28 +1768,6 @@ static void do_unregister_framebuffer(struct fb_info *fb_info)
 	put_fb_info(fb_info);
 }
 
-static void __unlink_framebuffer(struct fb_info *fb_info)
-{
-	int i;
-
-	i = fb_info->node;
-	if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
-		return;
-
-	if (fb_info->dev) {
-		device_destroy(fb_class, MKDEV(FB_MAJOR, i));
-		fb_info->dev = NULL;
-	}
-}
-
-void unlink_framebuffer(struct fb_info *fb_info)
-{
-	__unlink_framebuffer(fb_info);
-
-	unbind_console(fb_info);
-}
-EXPORT_SYMBOL(unlink_framebuffer);
-
 /**
  * remove_conflicting_framebuffers - remove firmware-configured framebuffers
  * @a: memory range, users of which are to be removed
-- 
2.20.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 20/33] fbdev/sh_mob: Remove fb notifier callback
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Geert Uytterhoeven, Sam Ravnborg,
	Maarten Lankhorst, Markus Elfring, Wolfram Sang

This seems to be entirely defunct:

- The FB_EVEN_SUSPEND/RESUME events are only sent out by
  fb_set_suspend. Which is supposed to be called by drivers in their
  suspend/resume hooks, and not itself call into drivers. Luckily
  sh_mob doesn't call fb_set_suspend, so this seems to do nothing
  useful.

- The notify hook calls sh_mobile_fb_reconfig() which in turn can
  call into the fb notifier. Or attempt too, since that would
  deadlock.

So looks like leftover hacks from when this was originally introduced
in

commit 6011bdeaa6089d49c02de69f05980da7bad314ab
Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date:   Wed Jul 21 10:13:21 2010 +0000

    fbdev: sh-mobile: HDMI support for SH-Mobile SoCs

So let's just remove it.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Markus Elfring <elfring@users.sourceforge.net>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
 drivers/video/fbdev/sh_mobile_lcdcfb.c | 38 --------------------------
 1 file changed, 38 deletions(-)

diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
index 1437695415c9..015a02a29d37 100644
--- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
+++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
@@ -213,7 +213,6 @@ struct sh_mobile_lcdc_priv {
 	struct sh_mobile_lcdc_chan ch[2];
 	struct sh_mobile_lcdc_overlay overlays[4];
 
-	struct notifier_block notifier;
 	int started;
 	int forced_fourcc; /* 2 channel LCDC must share fourcc setting */
 };
@@ -2239,37 +2238,6 @@ static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
  * Framebuffer notifier
  */
 
-/* locking: called with info->lock held */
-static int sh_mobile_lcdc_notify(struct notifier_block *nb,
-				 unsigned long action, void *data)
-{
-	struct fb_event *event = data;
-	struct fb_info *info = event->info;
-	struct sh_mobile_lcdc_chan *ch = info->par;
-
-	if (&ch->lcdc->notifier != nb)
-		return NOTIFY_DONE;
-
-	dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
-		__func__, action, event->data);
-
-	switch(action) {
-	case FB_EVENT_SUSPEND:
-		sh_mobile_lcdc_display_off(ch);
-		sh_mobile_lcdc_stop(ch->lcdc);
-		break;
-	case FB_EVENT_RESUME:
-		mutex_lock(&ch->open_lock);
-		sh_mobile_fb_reconfig(info);
-		mutex_unlock(&ch->open_lock);
-
-		sh_mobile_lcdc_display_on(ch);
-		sh_mobile_lcdc_start(ch->lcdc);
-	}
-
-	return NOTIFY_OK;
-}
-
 /* -----------------------------------------------------------------------------
  * Probe/remove and driver init/exit
  */
@@ -2297,8 +2265,6 @@ static int sh_mobile_lcdc_remove(struct platform_device *pdev)
 	struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
 	unsigned int i;
 
-	fb_unregister_client(&priv->notifier);
-
 	for (i = 0; i < ARRAY_SIZE(priv->overlays); i++)
 		sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]);
 	for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
@@ -2688,10 +2654,6 @@ static int sh_mobile_lcdc_probe(struct platform_device *pdev)
 			goto err1;
 	}
 
-	/* Failure ignored */
-	priv->notifier.notifier_call = sh_mobile_lcdc_notify;
-	fb_register_client(&priv->notifier);
-
 	return 0;
 err1:
 	sh_mobile_lcdc_remove(pdev);
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 20/33] fbdev/sh_mob: Remove fb notifier callback
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Geert Uytterhoeven, Sam Ravnborg,
	Maarten Lankhorst, Markus Elfring, Wolfram Sang

This seems to be entirely defunct:

- The FB_EVEN_SUSPEND/RESUME events are only sent out by
  fb_set_suspend. Which is supposed to be called by drivers in their
  suspend/resume hooks, and not itself call into drivers. Luckily
  sh_mob doesn't call fb_set_suspend, so this seems to do nothing
  useful.

- The notify hook calls sh_mobile_fb_reconfig() which in turn can
  call into the fb notifier. Or attempt too, since that would
  deadlock.

So looks like leftover hacks from when this was originally introduced
in

commit 6011bdeaa6089d49c02de69f05980da7bad314ab
Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date:   Wed Jul 21 10:13:21 2010 +0000

    fbdev: sh-mobile: HDMI support for SH-Mobile SoCs

So let's just remove it.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Markus Elfring <elfring@users.sourceforge.net>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
 drivers/video/fbdev/sh_mobile_lcdcfb.c | 38 --------------------------
 1 file changed, 38 deletions(-)

diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
index 1437695415c9..015a02a29d37 100644
--- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
+++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
@@ -213,7 +213,6 @@ struct sh_mobile_lcdc_priv {
 	struct sh_mobile_lcdc_chan ch[2];
 	struct sh_mobile_lcdc_overlay overlays[4];
 
-	struct notifier_block notifier;
 	int started;
 	int forced_fourcc; /* 2 channel LCDC must share fourcc setting */
 };
@@ -2239,37 +2238,6 @@ static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
  * Framebuffer notifier
  */
 
-/* locking: called with info->lock held */
-static int sh_mobile_lcdc_notify(struct notifier_block *nb,
-				 unsigned long action, void *data)
-{
-	struct fb_event *event = data;
-	struct fb_info *info = event->info;
-	struct sh_mobile_lcdc_chan *ch = info->par;
-
-	if (&ch->lcdc->notifier != nb)
-		return NOTIFY_DONE;
-
-	dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
-		__func__, action, event->data);
-
-	switch(action) {
-	case FB_EVENT_SUSPEND:
-		sh_mobile_lcdc_display_off(ch);
-		sh_mobile_lcdc_stop(ch->lcdc);
-		break;
-	case FB_EVENT_RESUME:
-		mutex_lock(&ch->open_lock);
-		sh_mobile_fb_reconfig(info);
-		mutex_unlock(&ch->open_lock);
-
-		sh_mobile_lcdc_display_on(ch);
-		sh_mobile_lcdc_start(ch->lcdc);
-	}
-
-	return NOTIFY_OK;
-}
-
 /* -----------------------------------------------------------------------------
  * Probe/remove and driver init/exit
  */
@@ -2297,8 +2265,6 @@ static int sh_mobile_lcdc_remove(struct platform_device *pdev)
 	struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
 	unsigned int i;
 
-	fb_unregister_client(&priv->notifier);
-
 	for (i = 0; i < ARRAY_SIZE(priv->overlays); i++)
 		sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]);
 	for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
@@ -2688,10 +2654,6 @@ static int sh_mobile_lcdc_probe(struct platform_device *pdev)
 			goto err1;
 	}
 
-	/* Failure ignored */
-	priv->notifier.notifier_call = sh_mobile_lcdc_notify;
-	fb_register_client(&priv->notifier);
-
 	return 0;
 err1:
 	sh_mobile_lcdc_remove(pdev);
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 21/33] fbdev: directly call fbcon_suspended/resumed
  2019-05-28  9:02 ` Daniel Vetter
  (?)
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Greg Kroah-Hartman, Prarit Bhargava, Kees Cook,
	Konstantin Khorenko, Yisheng Xie, Michał Mirosław,
	Peter Rosin, Mikulas Patocka

With the sh_mobile notifier removed we can just directly call the
fbcon code here.

v2: Remove now unused local variable.

v3: fixup !CONFIG_FRAMEBUFFER_CONSOLE, noticed by kbuild

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/core/fbcon.c | 10 ++--------
 drivers/video/fbdev/core/fbmem.c |  7 ++-----
 include/linux/fb.h               |  8 --------
 include/linux/fbcon.h            |  4 ++++
 4 files changed, 8 insertions(+), 21 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 142686953b71..e3267d71395c 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -2919,7 +2919,7 @@ static int fbcon_set_origin(struct vc_data *vc)
 	return 0;
 }
 
-static void fbcon_suspended(struct fb_info *info)
+void fbcon_suspended(struct fb_info *info)
 {
 	struct vc_data *vc = NULL;
 	struct fbcon_ops *ops = info->fbcon_par;
@@ -2932,7 +2932,7 @@ static void fbcon_suspended(struct fb_info *info)
 	fbcon_cursor(vc, CM_ERASE);
 }
 
-static void fbcon_resumed(struct fb_info *info)
+void fbcon_resumed(struct fb_info *info)
 {
 	struct vc_data *vc;
 	struct fbcon_ops *ops = info->fbcon_par;
@@ -3330,12 +3330,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	int idx, ret = 0;
 
 	switch(action) {
-	case FB_EVENT_SUSPEND:
-		fbcon_suspended(info);
-		break;
-	case FB_EVENT_RESUME:
-		fbcon_resumed(info);
-		break;
 	case FB_EVENT_MODE_CHANGE:
 		fbcon_modechanged(info);
 		break;
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index bee45e9405b8..73269dedcd45 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1917,17 +1917,14 @@ EXPORT_SYMBOL(unregister_framebuffer);
  */
 void fb_set_suspend(struct fb_info *info, int state)
 {
-	struct fb_event event;
-
 	WARN_CONSOLE_UNLOCKED();
 
-	event.info = info;
 	if (state) {
-		fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
+		fbcon_suspended(info);
 		info->state = FBINFO_STATE_SUSPENDED;
 	} else {
 		info->state = FBINFO_STATE_RUNNING;
-		fb_notifier_call_chain(FB_EVENT_RESUME, &event);
+		fbcon_resumed(info);
 	}
 }
 EXPORT_SYMBOL(fb_set_suspend);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index b90cf7d56bd8..794b386415b7 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -126,14 +126,6 @@ struct fb_cursor_user {
 
 /*	The resolution of the passed in fb_info about to change */ 
 #define FB_EVENT_MODE_CHANGE		0x01
-/*	The display on this fb_info is being suspended, no access to the
- *	framebuffer is allowed any more after that call returns
- */
-#define FB_EVENT_SUSPEND		0x02
-/*	The display on this fb_info was resumed, you can restore the display
- *	if you own it
- */
-#define FB_EVENT_RESUME			0x03
 /*      An entry from the modelist was removed */
 #define FB_EVENT_MODE_DELETE            0x04
 
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index 38d44fdb6d14..790c42ec7b5d 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -7,12 +7,16 @@ void __exit fb_console_exit(void);
 int fbcon_fb_registered(struct fb_info *info);
 void fbcon_fb_unregistered(struct fb_info *info);
 void fbcon_fb_unbind(struct fb_info *info);
+void fbcon_suspended(struct fb_info *info);
+void fbcon_resumed(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
 static inline int fbcon_fb_registered(struct fb_info *info) { return 0; }
 static inline void fbcon_fb_unregistered(struct fb_info *info) {}
 static inline void fbcon_fb_unbind(struct fb_info *info) {}
+static inline void fbcon_suspended(struct fb_info *info) {}
+static inline void fbcon_resumed(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 21/33] fbdev: directly call fbcon_suspended/resumed
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Greg Kroah-Hartman, Prarit Bhargava, Kees Cook,
	Konstantin Khorenko, Yisheng Xie, Michał Mirosław,
	Peter Rosin

With the sh_mobile notifier removed we can just directly call the
fbcon code here.

v2: Remove now unused local variable.

v3: fixup !CONFIG_FRAMEBUFFER_CONSOLE, noticed by kbuild

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/core/fbcon.c | 10 ++--------
 drivers/video/fbdev/core/fbmem.c |  7 ++-----
 include/linux/fb.h               |  8 --------
 include/linux/fbcon.h            |  4 ++++
 4 files changed, 8 insertions(+), 21 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 142686953b71..e3267d71395c 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -2919,7 +2919,7 @@ static int fbcon_set_origin(struct vc_data *vc)
 	return 0;
 }
 
-static void fbcon_suspended(struct fb_info *info)
+void fbcon_suspended(struct fb_info *info)
 {
 	struct vc_data *vc = NULL;
 	struct fbcon_ops *ops = info->fbcon_par;
@@ -2932,7 +2932,7 @@ static void fbcon_suspended(struct fb_info *info)
 	fbcon_cursor(vc, CM_ERASE);
 }
 
-static void fbcon_resumed(struct fb_info *info)
+void fbcon_resumed(struct fb_info *info)
 {
 	struct vc_data *vc;
 	struct fbcon_ops *ops = info->fbcon_par;
@@ -3330,12 +3330,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	int idx, ret = 0;
 
 	switch(action) {
-	case FB_EVENT_SUSPEND:
-		fbcon_suspended(info);
-		break;
-	case FB_EVENT_RESUME:
-		fbcon_resumed(info);
-		break;
 	case FB_EVENT_MODE_CHANGE:
 		fbcon_modechanged(info);
 		break;
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index bee45e9405b8..73269dedcd45 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1917,17 +1917,14 @@ EXPORT_SYMBOL(unregister_framebuffer);
  */
 void fb_set_suspend(struct fb_info *info, int state)
 {
-	struct fb_event event;
-
 	WARN_CONSOLE_UNLOCKED();
 
-	event.info = info;
 	if (state) {
-		fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
+		fbcon_suspended(info);
 		info->state = FBINFO_STATE_SUSPENDED;
 	} else {
 		info->state = FBINFO_STATE_RUNNING;
-		fb_notifier_call_chain(FB_EVENT_RESUME, &event);
+		fbcon_resumed(info);
 	}
 }
 EXPORT_SYMBOL(fb_set_suspend);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index b90cf7d56bd8..794b386415b7 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -126,14 +126,6 @@ struct fb_cursor_user {
 
 /*	The resolution of the passed in fb_info about to change */ 
 #define FB_EVENT_MODE_CHANGE		0x01
-/*	The display on this fb_info is being suspended, no access to the
- *	framebuffer is allowed any more after that call returns
- */
-#define FB_EVENT_SUSPEND		0x02
-/*	The display on this fb_info was resumed, you can restore the display
- *	if you own it
- */
-#define FB_EVENT_RESUME			0x03
 /*      An entry from the modelist was removed */
 #define FB_EVENT_MODE_DELETE            0x04
 
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index 38d44fdb6d14..790c42ec7b5d 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -7,12 +7,16 @@ void __exit fb_console_exit(void);
 int fbcon_fb_registered(struct fb_info *info);
 void fbcon_fb_unregistered(struct fb_info *info);
 void fbcon_fb_unbind(struct fb_info *info);
+void fbcon_suspended(struct fb_info *info);
+void fbcon_resumed(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
 static inline int fbcon_fb_registered(struct fb_info *info) { return 0; }
 static inline void fbcon_fb_unregistered(struct fb_info *info) {}
 static inline void fbcon_fb_unbind(struct fb_info *info) {}
+static inline void fbcon_suspended(struct fb_info *info) {}
+static inline void fbcon_resumed(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 21/33] fbdev: directly call fbcon_suspended/resumed
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Greg Kroah-Hartman, Prarit Bhargava, Kees Cook,
	Konstantin Khorenko, Yisheng Xie, Michał Mirosław,
	Peter Rosin

With the sh_mobile notifier removed we can just directly call the
fbcon code here.

v2: Remove now unused local variable.

v3: fixup !CONFIG_FRAMEBUFFER_CONSOLE, noticed by kbuild

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/core/fbcon.c | 10 ++--------
 drivers/video/fbdev/core/fbmem.c |  7 ++-----
 include/linux/fb.h               |  8 --------
 include/linux/fbcon.h            |  4 ++++
 4 files changed, 8 insertions(+), 21 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 142686953b71..e3267d71395c 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -2919,7 +2919,7 @@ static int fbcon_set_origin(struct vc_data *vc)
 	return 0;
 }
 
-static void fbcon_suspended(struct fb_info *info)
+void fbcon_suspended(struct fb_info *info)
 {
 	struct vc_data *vc = NULL;
 	struct fbcon_ops *ops = info->fbcon_par;
@@ -2932,7 +2932,7 @@ static void fbcon_suspended(struct fb_info *info)
 	fbcon_cursor(vc, CM_ERASE);
 }
 
-static void fbcon_resumed(struct fb_info *info)
+void fbcon_resumed(struct fb_info *info)
 {
 	struct vc_data *vc;
 	struct fbcon_ops *ops = info->fbcon_par;
@@ -3330,12 +3330,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	int idx, ret = 0;
 
 	switch(action) {
-	case FB_EVENT_SUSPEND:
-		fbcon_suspended(info);
-		break;
-	case FB_EVENT_RESUME:
-		fbcon_resumed(info);
-		break;
 	case FB_EVENT_MODE_CHANGE:
 		fbcon_modechanged(info);
 		break;
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index bee45e9405b8..73269dedcd45 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1917,17 +1917,14 @@ EXPORT_SYMBOL(unregister_framebuffer);
  */
 void fb_set_suspend(struct fb_info *info, int state)
 {
-	struct fb_event event;
-
 	WARN_CONSOLE_UNLOCKED();
 
-	event.info = info;
 	if (state) {
-		fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
+		fbcon_suspended(info);
 		info->state = FBINFO_STATE_SUSPENDED;
 	} else {
 		info->state = FBINFO_STATE_RUNNING;
-		fb_notifier_call_chain(FB_EVENT_RESUME, &event);
+		fbcon_resumed(info);
 	}
 }
 EXPORT_SYMBOL(fb_set_suspend);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index b90cf7d56bd8..794b386415b7 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -126,14 +126,6 @@ struct fb_cursor_user {
 
 /*	The resolution of the passed in fb_info about to change */ 
 #define FB_EVENT_MODE_CHANGE		0x01
-/*	The display on this fb_info is being suspended, no access to the
- *	framebuffer is allowed any more after that call returns
- */
-#define FB_EVENT_SUSPEND		0x02
-/*	The display on this fb_info was resumed, you can restore the display
- *	if you own it
- */
-#define FB_EVENT_RESUME			0x03
 /*      An entry from the modelist was removed */
 #define FB_EVENT_MODE_DELETE            0x04
 
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index 38d44fdb6d14..790c42ec7b5d 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -7,12 +7,16 @@ void __exit fb_console_exit(void);
 int fbcon_fb_registered(struct fb_info *info);
 void fbcon_fb_unregistered(struct fb_info *info);
 void fbcon_fb_unbind(struct fb_info *info);
+void fbcon_suspended(struct fb_info *info);
+void fbcon_resumed(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
 static inline int fbcon_fb_registered(struct fb_info *info) { return 0; }
 static inline void fbcon_fb_unregistered(struct fb_info *info) {}
 static inline void fbcon_fb_unbind(struct fb_info *info) {}
+static inline void fbcon_suspended(struct fb_info *info) {}
+static inline void fbcon_resumed(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 22/33] fbcon: Call fbcon_mode_deleted/new_modelist directly
  2019-05-28  9:02 ` Daniel Vetter
  (?)
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Mikulas Patocka, Sergey Senozhatsky, Kees Cook, Peter Rosin,
	Yisheng Xie, Michał Mirosław

I'm not entirely clear on what new_modelist actually does, it seems
exclusively for a sysfs interface. Which in the end does amount to a
normal fb_set_par to check the mode, but then takes a different path
in both fbmem.c and fbcon.c.

I have no idea why these 2 paths are different, but then I also don't
really want to find out. So just do the simple conversion to a direct
function call.

v2: static inline for the dummy versions, I forgot.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Peter Rosin <peda@axentia.se>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/core/fbcon.c | 14 +++-----------
 drivers/video/fbdev/core/fbmem.c | 22 +++++++---------------
 include/linux/fb.h               |  5 -----
 include/linux/fbcon.h            |  6 ++++++
 4 files changed, 16 insertions(+), 31 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index e3267d71395c..515366308537 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3019,8 +3019,8 @@ static void fbcon_set_all_vcs(struct fb_info *info)
 		fbcon_modechanged(info);
 }
 
-static int fbcon_mode_deleted(struct fb_info *info,
-			      struct fb_videomode *mode)
+int fbcon_mode_deleted(struct fb_info *info,
+		       struct fb_videomode *mode)
 {
 	struct fb_info *fb_info;
 	struct fbcon_display *p;
@@ -3262,7 +3262,7 @@ static void fbcon_fb_blanked(struct fb_info *info, int blank)
 	ops->blank_state = blank;
 }
 
-static void fbcon_new_modelist(struct fb_info *info)
+void fbcon_new_modelist(struct fb_info *info)
 {
 	int i;
 	struct vc_data *vc;
@@ -3324,7 +3324,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 {
 	struct fb_event *event = data;
 	struct fb_info *info = event->info;
-	struct fb_videomode *mode;
 	struct fb_con2fbmap *con2fb;
 	struct fb_blit_caps *caps;
 	int idx, ret = 0;
@@ -3336,10 +3335,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	case FB_EVENT_MODE_CHANGE_ALL:
 		fbcon_set_all_vcs(info);
 		break;
-	case FB_EVENT_MODE_DELETE:
-		mode = event->data;
-		ret = fbcon_mode_deleted(info, mode);
-		break;
 	case FB_EVENT_SET_CONSOLE_MAP:
 		/* called with console lock held */
 		con2fb = event->data;
@@ -3353,9 +3348,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	case FB_EVENT_BLANK:
 		fbcon_fb_blanked(info, *(int *)event->data);
 		break;
-	case FB_EVENT_NEW_MODELIST:
-		fbcon_new_modelist(info);
-		break;
 	case FB_EVENT_GET_REQ:
 		caps = event->data;
 		fbcon_get_requirement(info, caps);
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 73269dedcd45..cbdd141e7695 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -966,16 +966,11 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 		/* make sure we don't delete the videomode of current var */
 		ret = fb_mode_is_equal(&mode1, &mode2);
 
-		if (!ret) {
-		    struct fb_event event;
-
-		    event.info = info;
-		    event.data = &mode1;
-		    ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
-		}
+		if (!ret)
+			fbcon_mode_deleted(info, &mode1);
 
 		if (!ret)
-		    fb_delete_videomode(&mode1, &info->modelist);
+			fb_delete_videomode(&mode1, &info->modelist);
 
 
 		ret = (ret) ? -EINVAL : 0;
@@ -1992,7 +1987,6 @@ subsys_initcall(fbmem_init);
 
 int fb_new_modelist(struct fb_info *info)
 {
-	struct fb_event event;
 	struct fb_var_screeninfo var = info->var;
 	struct list_head *pos, *n;
 	struct fb_modelist *modelist;
@@ -2012,14 +2006,12 @@ int fb_new_modelist(struct fb_info *info)
 		}
 	}
 
-	err = 1;
+	if (list_empty(&info->modelist))
+		return 1;
 
-	if (!list_empty(&info->modelist)) {
-		event.info = info;
-		err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
-	}
+	fbcon_new_modelist(info);
 
-	return err;
+	return 0;
 }
 
 MODULE_LICENSE("GPL");
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 794b386415b7..7a788ed8c7b5 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -126,8 +126,6 @@ struct fb_cursor_user {
 
 /*	The resolution of the passed in fb_info about to change */ 
 #define FB_EVENT_MODE_CHANGE		0x01
-/*      An entry from the modelist was removed */
-#define FB_EVENT_MODE_DELETE            0x04
 
 #ifdef CONFIG_GUMSTIX_AM200EPD
 /* only used by mach-pxa/am200epd.c */
@@ -142,9 +140,6 @@ struct fb_cursor_user {
 /*      A hardware display blank change occurred */
 #define FB_EVENT_BLANK                  0x09
 /*      Private modelist is to be replaced */
-#define FB_EVENT_NEW_MODELIST           0x0A
-/*	The resolution of the passed in fb_info about to change and
-        all vc's should be changed         */
 #define FB_EVENT_MODE_CHANGE_ALL	0x0B
 /*	A software display blank change occurred */
 #define FB_EVENT_CONBLANK               0x0C
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index 790c42ec7b5d..c139834342f5 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -9,6 +9,9 @@ void fbcon_fb_unregistered(struct fb_info *info);
 void fbcon_fb_unbind(struct fb_info *info);
 void fbcon_suspended(struct fb_info *info);
 void fbcon_resumed(struct fb_info *info);
+int fbcon_mode_deleted(struct fb_info *info,
+		       struct fb_videomode *mode);
+void fbcon_new_modelist(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
@@ -17,6 +20,9 @@ static inline void fbcon_fb_unregistered(struct fb_info *info) {}
 static inline void fbcon_fb_unbind(struct fb_info *info) {}
 static inline void fbcon_suspended(struct fb_info *info) {}
 static inline void fbcon_resumed(struct fb_info *info) {}
+static inline int fbcon_mode_deleted(struct fb_info *info,
+				     struct fb_videomode *mode) { return 0; }
+static inline void fbcon_new_modelist(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 22/33] fbcon: Call fbcon_mode_deleted/new_modelist directly
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Sergey Senozhatsky, Kees Cook,
	Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Michał Mirosław, Yisheng Xie, Hans de Goede,
	Mikulas Patocka, Daniel Vetter, Sam Ravnborg, Peter Rosin

I'm not entirely clear on what new_modelist actually does, it seems
exclusively for a sysfs interface. Which in the end does amount to a
normal fb_set_par to check the mode, but then takes a different path
in both fbmem.c and fbcon.c.

I have no idea why these 2 paths are different, but then I also don't
really want to find out. So just do the simple conversion to a direct
function call.

v2: static inline for the dummy versions, I forgot.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Peter Rosin <peda@axentia.se>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/core/fbcon.c | 14 +++-----------
 drivers/video/fbdev/core/fbmem.c | 22 +++++++---------------
 include/linux/fb.h               |  5 -----
 include/linux/fbcon.h            |  6 ++++++
 4 files changed, 16 insertions(+), 31 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index e3267d71395c..515366308537 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3019,8 +3019,8 @@ static void fbcon_set_all_vcs(struct fb_info *info)
 		fbcon_modechanged(info);
 }
 
-static int fbcon_mode_deleted(struct fb_info *info,
-			      struct fb_videomode *mode)
+int fbcon_mode_deleted(struct fb_info *info,
+		       struct fb_videomode *mode)
 {
 	struct fb_info *fb_info;
 	struct fbcon_display *p;
@@ -3262,7 +3262,7 @@ static void fbcon_fb_blanked(struct fb_info *info, int blank)
 	ops->blank_state = blank;
 }
 
-static void fbcon_new_modelist(struct fb_info *info)
+void fbcon_new_modelist(struct fb_info *info)
 {
 	int i;
 	struct vc_data *vc;
@@ -3324,7 +3324,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 {
 	struct fb_event *event = data;
 	struct fb_info *info = event->info;
-	struct fb_videomode *mode;
 	struct fb_con2fbmap *con2fb;
 	struct fb_blit_caps *caps;
 	int idx, ret = 0;
@@ -3336,10 +3335,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	case FB_EVENT_MODE_CHANGE_ALL:
 		fbcon_set_all_vcs(info);
 		break;
-	case FB_EVENT_MODE_DELETE:
-		mode = event->data;
-		ret = fbcon_mode_deleted(info, mode);
-		break;
 	case FB_EVENT_SET_CONSOLE_MAP:
 		/* called with console lock held */
 		con2fb = event->data;
@@ -3353,9 +3348,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	case FB_EVENT_BLANK:
 		fbcon_fb_blanked(info, *(int *)event->data);
 		break;
-	case FB_EVENT_NEW_MODELIST:
-		fbcon_new_modelist(info);
-		break;
 	case FB_EVENT_GET_REQ:
 		caps = event->data;
 		fbcon_get_requirement(info, caps);
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 73269dedcd45..cbdd141e7695 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -966,16 +966,11 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 		/* make sure we don't delete the videomode of current var */
 		ret = fb_mode_is_equal(&mode1, &mode2);
 
-		if (!ret) {
-		    struct fb_event event;
-
-		    event.info = info;
-		    event.data = &mode1;
-		    ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
-		}
+		if (!ret)
+			fbcon_mode_deleted(info, &mode1);
 
 		if (!ret)
-		    fb_delete_videomode(&mode1, &info->modelist);
+			fb_delete_videomode(&mode1, &info->modelist);
 
 
 		ret = (ret) ? -EINVAL : 0;
@@ -1992,7 +1987,6 @@ subsys_initcall(fbmem_init);
 
 int fb_new_modelist(struct fb_info *info)
 {
-	struct fb_event event;
 	struct fb_var_screeninfo var = info->var;
 	struct list_head *pos, *n;
 	struct fb_modelist *modelist;
@@ -2012,14 +2006,12 @@ int fb_new_modelist(struct fb_info *info)
 		}
 	}
 
-	err = 1;
+	if (list_empty(&info->modelist))
+		return 1;
 
-	if (!list_empty(&info->modelist)) {
-		event.info = info;
-		err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
-	}
+	fbcon_new_modelist(info);
 
-	return err;
+	return 0;
 }
 
 MODULE_LICENSE("GPL");
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 794b386415b7..7a788ed8c7b5 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -126,8 +126,6 @@ struct fb_cursor_user {
 
 /*	The resolution of the passed in fb_info about to change */ 
 #define FB_EVENT_MODE_CHANGE		0x01
-/*      An entry from the modelist was removed */
-#define FB_EVENT_MODE_DELETE            0x04
 
 #ifdef CONFIG_GUMSTIX_AM200EPD
 /* only used by mach-pxa/am200epd.c */
@@ -142,9 +140,6 @@ struct fb_cursor_user {
 /*      A hardware display blank change occurred */
 #define FB_EVENT_BLANK                  0x09
 /*      Private modelist is to be replaced */
-#define FB_EVENT_NEW_MODELIST           0x0A
-/*	The resolution of the passed in fb_info about to change and
-        all vc's should be changed         */
 #define FB_EVENT_MODE_CHANGE_ALL	0x0B
 /*	A software display blank change occurred */
 #define FB_EVENT_CONBLANK               0x0C
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index 790c42ec7b5d..c139834342f5 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -9,6 +9,9 @@ void fbcon_fb_unregistered(struct fb_info *info);
 void fbcon_fb_unbind(struct fb_info *info);
 void fbcon_suspended(struct fb_info *info);
 void fbcon_resumed(struct fb_info *info);
+int fbcon_mode_deleted(struct fb_info *info,
+		       struct fb_videomode *mode);
+void fbcon_new_modelist(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
@@ -17,6 +20,9 @@ static inline void fbcon_fb_unregistered(struct fb_info *info) {}
 static inline void fbcon_fb_unbind(struct fb_info *info) {}
 static inline void fbcon_suspended(struct fb_info *info) {}
 static inline void fbcon_resumed(struct fb_info *info) {}
+static inline int fbcon_mode_deleted(struct fb_info *info,
+				     struct fb_videomode *mode) { return 0; }
+static inline void fbcon_new_modelist(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 22/33] fbcon: Call fbcon_mode_deleted/new_modelist directly
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: Daniel Thompson, Sergey Senozhatsky, Kees Cook,
	Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, linux-fbdev, DRI Development,
	Michał Mirosław, Yisheng Xie, Hans de Goede,
	Mikulas Patocka, Daniel Vetter, Sam Ravnborg, Peter Rosin

I'm not entirely clear on what new_modelist actually does, it seems
exclusively for a sysfs interface. Which in the end does amount to a
normal fb_set_par to check the mode, but then takes a different path
in both fbmem.c and fbcon.c.

I have no idea why these 2 paths are different, but then I also don't
really want to find out. So just do the simple conversion to a direct
function call.

v2: static inline for the dummy versions, I forgot.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Peter Rosin <peda@axentia.se>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/core/fbcon.c | 14 +++-----------
 drivers/video/fbdev/core/fbmem.c | 22 +++++++---------------
 include/linux/fb.h               |  5 -----
 include/linux/fbcon.h            |  6 ++++++
 4 files changed, 16 insertions(+), 31 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index e3267d71395c..515366308537 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3019,8 +3019,8 @@ static void fbcon_set_all_vcs(struct fb_info *info)
 		fbcon_modechanged(info);
 }
 
-static int fbcon_mode_deleted(struct fb_info *info,
-			      struct fb_videomode *mode)
+int fbcon_mode_deleted(struct fb_info *info,
+		       struct fb_videomode *mode)
 {
 	struct fb_info *fb_info;
 	struct fbcon_display *p;
@@ -3262,7 +3262,7 @@ static void fbcon_fb_blanked(struct fb_info *info, int blank)
 	ops->blank_state = blank;
 }
 
-static void fbcon_new_modelist(struct fb_info *info)
+void fbcon_new_modelist(struct fb_info *info)
 {
 	int i;
 	struct vc_data *vc;
@@ -3324,7 +3324,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 {
 	struct fb_event *event = data;
 	struct fb_info *info = event->info;
-	struct fb_videomode *mode;
 	struct fb_con2fbmap *con2fb;
 	struct fb_blit_caps *caps;
 	int idx, ret = 0;
@@ -3336,10 +3335,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	case FB_EVENT_MODE_CHANGE_ALL:
 		fbcon_set_all_vcs(info);
 		break;
-	case FB_EVENT_MODE_DELETE:
-		mode = event->data;
-		ret = fbcon_mode_deleted(info, mode);
-		break;
 	case FB_EVENT_SET_CONSOLE_MAP:
 		/* called with console lock held */
 		con2fb = event->data;
@@ -3353,9 +3348,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	case FB_EVENT_BLANK:
 		fbcon_fb_blanked(info, *(int *)event->data);
 		break;
-	case FB_EVENT_NEW_MODELIST:
-		fbcon_new_modelist(info);
-		break;
 	case FB_EVENT_GET_REQ:
 		caps = event->data;
 		fbcon_get_requirement(info, caps);
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 73269dedcd45..cbdd141e7695 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -966,16 +966,11 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 		/* make sure we don't delete the videomode of current var */
 		ret = fb_mode_is_equal(&mode1, &mode2);
 
-		if (!ret) {
-		    struct fb_event event;
-
-		    event.info = info;
-		    event.data = &mode1;
-		    ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
-		}
+		if (!ret)
+			fbcon_mode_deleted(info, &mode1);
 
 		if (!ret)
-		    fb_delete_videomode(&mode1, &info->modelist);
+			fb_delete_videomode(&mode1, &info->modelist);
 
 
 		ret = (ret) ? -EINVAL : 0;
@@ -1992,7 +1987,6 @@ subsys_initcall(fbmem_init);
 
 int fb_new_modelist(struct fb_info *info)
 {
-	struct fb_event event;
 	struct fb_var_screeninfo var = info->var;
 	struct list_head *pos, *n;
 	struct fb_modelist *modelist;
@@ -2012,14 +2006,12 @@ int fb_new_modelist(struct fb_info *info)
 		}
 	}
 
-	err = 1;
+	if (list_empty(&info->modelist))
+		return 1;
 
-	if (!list_empty(&info->modelist)) {
-		event.info = info;
-		err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
-	}
+	fbcon_new_modelist(info);
 
-	return err;
+	return 0;
 }
 
 MODULE_LICENSE("GPL");
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 794b386415b7..7a788ed8c7b5 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -126,8 +126,6 @@ struct fb_cursor_user {
 
 /*	The resolution of the passed in fb_info about to change */ 
 #define FB_EVENT_MODE_CHANGE		0x01
-/*      An entry from the modelist was removed */
-#define FB_EVENT_MODE_DELETE            0x04
 
 #ifdef CONFIG_GUMSTIX_AM200EPD
 /* only used by mach-pxa/am200epd.c */
@@ -142,9 +140,6 @@ struct fb_cursor_user {
 /*      A hardware display blank change occurred */
 #define FB_EVENT_BLANK                  0x09
 /*      Private modelist is to be replaced */
-#define FB_EVENT_NEW_MODELIST           0x0A
-/*	The resolution of the passed in fb_info about to change and
-        all vc's should be changed         */
 #define FB_EVENT_MODE_CHANGE_ALL	0x0B
 /*	A software display blank change occurred */
 #define FB_EVENT_CONBLANK               0x0C
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index 790c42ec7b5d..c139834342f5 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -9,6 +9,9 @@ void fbcon_fb_unregistered(struct fb_info *info);
 void fbcon_fb_unbind(struct fb_info *info);
 void fbcon_suspended(struct fb_info *info);
 void fbcon_resumed(struct fb_info *info);
+int fbcon_mode_deleted(struct fb_info *info,
+		       struct fb_videomode *mode);
+void fbcon_new_modelist(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
@@ -17,6 +20,9 @@ static inline void fbcon_fb_unregistered(struct fb_info *info) {}
 static inline void fbcon_fb_unbind(struct fb_info *info) {}
 static inline void fbcon_suspended(struct fb_info *info) {}
 static inline void fbcon_resumed(struct fb_info *info) {}
+static inline int fbcon_mode_deleted(struct fb_info *info,
+				     struct fb_videomode *mode) { return 0; }
+static inline void fbcon_new_modelist(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 23/33] fbdev: Call fbcon_get_requirement directly
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Steven Rostedt (VMware),
	Prarit Bhargava, Kees Cook, Yisheng Xie,
	Michał Mirosław, Peter Rosin, Mikulas Patocka

Pretty simple case really.

v2: Forgot to remove a break;

v3: Add static inline to the dummy versions.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/core/fbcon.c | 9 ++-------
 drivers/video/fbdev/core/fbmem.c | 5 +----
 include/linux/fb.h               | 2 --
 include/linux/fbcon.h            | 4 ++++
 4 files changed, 7 insertions(+), 13 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 515366308537..ef69bd4ad343 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3283,8 +3283,8 @@ void fbcon_new_modelist(struct fb_info *info)
 	}
 }
 
-static void fbcon_get_requirement(struct fb_info *info,
-				  struct fb_blit_caps *caps)
+void fbcon_get_requirement(struct fb_info *info,
+			   struct fb_blit_caps *caps)
 {
 	struct vc_data *vc;
 	struct fbcon_display *p;
@@ -3325,7 +3325,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	struct fb_event *event = data;
 	struct fb_info *info = event->info;
 	struct fb_con2fbmap *con2fb;
-	struct fb_blit_caps *caps;
 	int idx, ret = 0;
 
 	switch(action) {
@@ -3348,10 +3347,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	case FB_EVENT_BLANK:
 		fbcon_fb_blanked(info, *(int *)event->data);
 		break;
-	case FB_EVENT_GET_REQ:
-		caps = event->data;
-		fbcon_get_requirement(info, caps);
-		break;
 	case FB_EVENT_REMAP_ALL_CONSOLE:
 		idx = info->node;
 		fbcon_remap_all(idx);
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index cbdd141e7695..ddc0c16b8bbf 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -932,16 +932,13 @@ EXPORT_SYMBOL(fb_pan_display);
 static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
 			 u32 activate)
 {
-	struct fb_event event;
 	struct fb_blit_caps caps, fbcaps;
 	int err = 0;
 
 	memset(&caps, 0, sizeof(caps));
 	memset(&fbcaps, 0, sizeof(fbcaps));
 	caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
-	event.info = info;
-	event.data = &caps;
-	fb_notifier_call_chain(FB_EVENT_GET_REQ, &event);
+	fbcon_get_requirement(info, &caps);
 	info->fbops->fb_get_caps(info, &fbcaps, var);
 
 	if (((fbcaps.x ^ caps.x) & caps.x) ||
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 7a788ed8c7b5..0d86aa31bf8d 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -143,8 +143,6 @@ struct fb_cursor_user {
 #define FB_EVENT_MODE_CHANGE_ALL	0x0B
 /*	A software display blank change occurred */
 #define FB_EVENT_CONBLANK               0x0C
-/*      Get drawing requirements        */
-#define FB_EVENT_GET_REQ                0x0D
 /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
 #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
 /*      A hardware display blank early change occurred */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index c139834342f5..305e4f2eddac 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -12,6 +12,8 @@ void fbcon_resumed(struct fb_info *info);
 int fbcon_mode_deleted(struct fb_info *info,
 		       struct fb_videomode *mode);
 void fbcon_new_modelist(struct fb_info *info);
+void fbcon_get_requirement(struct fb_info *info,
+			   struct fb_blit_caps *caps);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
@@ -23,6 +25,8 @@ static inline void fbcon_resumed(struct fb_info *info) {}
 static inline int fbcon_mode_deleted(struct fb_info *info,
 				     struct fb_videomode *mode) { return 0; }
 static inline void fbcon_new_modelist(struct fb_info *info) {}
+static inline void fbcon_get_requirement(struct fb_info *info,
+					 struct fb_blit_caps *caps) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 23/33] fbdev: Call fbcon_get_requirement directly
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Steven Rostedt (VMware),
	Prarit Bhargava, Kees Cook, Yisheng Xie,
	Michał Mirosław, Peter Rosin, Mikulas Patocka

Pretty simple case really.

v2: Forgot to remove a break;

v3: Add static inline to the dummy versions.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/fbdev/core/fbcon.c | 9 ++-------
 drivers/video/fbdev/core/fbmem.c | 5 +----
 include/linux/fb.h               | 2 --
 include/linux/fbcon.h            | 4 ++++
 4 files changed, 7 insertions(+), 13 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 515366308537..ef69bd4ad343 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3283,8 +3283,8 @@ void fbcon_new_modelist(struct fb_info *info)
 	}
 }
 
-static void fbcon_get_requirement(struct fb_info *info,
-				  struct fb_blit_caps *caps)
+void fbcon_get_requirement(struct fb_info *info,
+			   struct fb_blit_caps *caps)
 {
 	struct vc_data *vc;
 	struct fbcon_display *p;
@@ -3325,7 +3325,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	struct fb_event *event = data;
 	struct fb_info *info = event->info;
 	struct fb_con2fbmap *con2fb;
-	struct fb_blit_caps *caps;
 	int idx, ret = 0;
 
 	switch(action) {
@@ -3348,10 +3347,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	case FB_EVENT_BLANK:
 		fbcon_fb_blanked(info, *(int *)event->data);
 		break;
-	case FB_EVENT_GET_REQ:
-		caps = event->data;
-		fbcon_get_requirement(info, caps);
-		break;
 	case FB_EVENT_REMAP_ALL_CONSOLE:
 		idx = info->node;
 		fbcon_remap_all(idx);
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index cbdd141e7695..ddc0c16b8bbf 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -932,16 +932,13 @@ EXPORT_SYMBOL(fb_pan_display);
 static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
 			 u32 activate)
 {
-	struct fb_event event;
 	struct fb_blit_caps caps, fbcaps;
 	int err = 0;
 
 	memset(&caps, 0, sizeof(caps));
 	memset(&fbcaps, 0, sizeof(fbcaps));
 	caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
-	event.info = info;
-	event.data = &caps;
-	fb_notifier_call_chain(FB_EVENT_GET_REQ, &event);
+	fbcon_get_requirement(info, &caps);
 	info->fbops->fb_get_caps(info, &fbcaps, var);
 
 	if (((fbcaps.x ^ caps.x) & caps.x) ||
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 7a788ed8c7b5..0d86aa31bf8d 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -143,8 +143,6 @@ struct fb_cursor_user {
 #define FB_EVENT_MODE_CHANGE_ALL	0x0B
 /*	A software display blank change occurred */
 #define FB_EVENT_CONBLANK               0x0C
-/*      Get drawing requirements        */
-#define FB_EVENT_GET_REQ                0x0D
 /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
 #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
 /*      A hardware display blank early change occurred */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index c139834342f5..305e4f2eddac 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -12,6 +12,8 @@ void fbcon_resumed(struct fb_info *info);
 int fbcon_mode_deleted(struct fb_info *info,
 		       struct fb_videomode *mode);
 void fbcon_new_modelist(struct fb_info *info);
+void fbcon_get_requirement(struct fb_info *info,
+			   struct fb_blit_caps *caps);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
@@ -23,6 +25,8 @@ static inline void fbcon_resumed(struct fb_info *info) {}
 static inline int fbcon_mode_deleted(struct fb_info *info,
 				     struct fb_videomode *mode) { return 0; }
 static inline void fbcon_new_modelist(struct fb_info *info) {}
+static inline void fbcon_get_requirement(struct fb_info *info,
+					 struct fb_blit_caps *caps) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 24/33] Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Richard Purdie, Daniel Vetter, Sam Ravnborg, Maarten Lankhorst,
	Lee Jones, Jingoo Han, Hans de Goede, Yisheng Xie

This reverts commit 994efacdf9a087b52f71e620b58dfa526b0cf928.

The justification is that if hw blanking fails (i.e. fbops->fb_blank)
fails, then we still want to shut down the backlight. Which is exactly
_not_ what fb_blank() does and so rather inconsistent if we end up
with different behaviour between fbcon and direct fbdev usage. Given
that the entire notifier maze is getting in the way anyway I figured
it's simplest to revert this not well justified commit.

v2: Add static inline to the dummy version.

Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/backlight/backlight.c |  2 +-
 drivers/video/fbdev/core/fbcon.c    | 14 +-------------
 drivers/video/fbdev/core/fbmem.c    |  1 +
 include/linux/fb.h                  |  4 +---
 include/linux/fbcon.h               |  2 ++
 5 files changed, 6 insertions(+), 17 deletions(-)

diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 1ef8b6fd62ac..5dc07106a59e 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -47,7 +47,7 @@ static int fb_notifier_callback(struct notifier_block *self,
 	int fb_blank = 0;
 
 	/* If we aren't interested in this event, skip it immediately ... */
-	if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK)
+	if (event != FB_EVENT_BLANK)
 		return 0;
 
 	bd = container_of(self, struct backlight_device, fb_notif);
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index ef69bd4ad343..a4617067ff24 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -2350,8 +2350,6 @@ static int fbcon_switch(struct vc_data *vc)
 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
 				int blank)
 {
-	struct fb_event event;
-
 	if (blank) {
 		unsigned short charmask = vc->vc_hi_font_mask ?
 			0x1ff : 0xff;
@@ -2362,13 +2360,6 @@ static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
 		fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
 		vc->vc_video_erase_char = oldc;
 	}
-
-
-	lock_fb_info(info);
-	event.info = info;
-	event.data = &blank;
-	fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
-	unlock_fb_info(info);
 }
 
 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
@@ -3240,7 +3231,7 @@ int fbcon_fb_registered(struct fb_info *info)
 	return ret;
 }
 
-static void fbcon_fb_blanked(struct fb_info *info, int blank)
+void fbcon_fb_blanked(struct fb_info *info, int blank)
 {
 	struct fbcon_ops *ops = info->fbcon_par;
 	struct vc_data *vc;
@@ -3344,9 +3335,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 		con2fb = event->data;
 		con2fb->framebuffer = con2fb_map[con2fb->console - 1];
 		break;
-	case FB_EVENT_BLANK:
-		fbcon_fb_blanked(info, *(int *)event->data);
-		break;
 	case FB_EVENT_REMAP_ALL_CONSOLE:
 		idx = info->node;
 		fbcon_remap_all(idx);
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index ddc0c16b8bbf..9366fbe99a58 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1068,6 +1068,7 @@ fb_blank(struct fb_info *info, int blank)
 	event.data = &blank;
 
 	early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
+	fbcon_fb_blanked(info, blank);
 
 	if (info->fbops->fb_blank)
  		ret = info->fbops->fb_blank(blank, info);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 0d86aa31bf8d..1e66fac3124f 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -137,12 +137,10 @@ struct fb_cursor_user {
 #define FB_EVENT_GET_CONSOLE_MAP        0x07
 /*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
 #define FB_EVENT_SET_CONSOLE_MAP        0x08
-/*      A hardware display blank change occurred */
+/*      A display blank is requested       */
 #define FB_EVENT_BLANK                  0x09
 /*      Private modelist is to be replaced */
 #define FB_EVENT_MODE_CHANGE_ALL	0x0B
-/*	A software display blank change occurred */
-#define FB_EVENT_CONBLANK               0x0C
 /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
 #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
 /*      A hardware display blank early change occurred */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index 305e4f2eddac..d67d7ec51ef9 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -14,6 +14,7 @@ int fbcon_mode_deleted(struct fb_info *info,
 void fbcon_new_modelist(struct fb_info *info);
 void fbcon_get_requirement(struct fb_info *info,
 			   struct fb_blit_caps *caps);
+void fbcon_fb_blanked(struct fb_info *info, int blank);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
@@ -27,6 +28,7 @@ static inline int fbcon_mode_deleted(struct fb_info *info,
 static inline void fbcon_new_modelist(struct fb_info *info) {}
 static inline void fbcon_get_requirement(struct fb_info *info,
 					 struct fb_blit_caps *caps) {}
+static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 24/33] Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Richard Purdie, Daniel Vetter, Sam Ravnborg, Maarten Lankhorst,
	Lee Jones, Jingoo Han, Hans de Goede, Yisheng Xie

This reverts commit 994efacdf9a087b52f71e620b58dfa526b0cf928.

The justification is that if hw blanking fails (i.e. fbops->fb_blank)
fails, then we still want to shut down the backlight. Which is exactly
_not_ what fb_blank() does and so rather inconsistent if we end up
with different behaviour between fbcon and direct fbdev usage. Given
that the entire notifier maze is getting in the way anyway I figured
it's simplest to revert this not well justified commit.

v2: Add static inline to the dummy version.

Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/backlight/backlight.c |  2 +-
 drivers/video/fbdev/core/fbcon.c    | 14 +-------------
 drivers/video/fbdev/core/fbmem.c    |  1 +
 include/linux/fb.h                  |  4 +---
 include/linux/fbcon.h               |  2 ++
 5 files changed, 6 insertions(+), 17 deletions(-)

diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 1ef8b6fd62ac..5dc07106a59e 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -47,7 +47,7 @@ static int fb_notifier_callback(struct notifier_block *self,
 	int fb_blank = 0;
 
 	/* If we aren't interested in this event, skip it immediately ... */
-	if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK)
+	if (event != FB_EVENT_BLANK)
 		return 0;
 
 	bd = container_of(self, struct backlight_device, fb_notif);
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index ef69bd4ad343..a4617067ff24 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -2350,8 +2350,6 @@ static int fbcon_switch(struct vc_data *vc)
 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
 				int blank)
 {
-	struct fb_event event;
-
 	if (blank) {
 		unsigned short charmask = vc->vc_hi_font_mask ?
 			0x1ff : 0xff;
@@ -2362,13 +2360,6 @@ static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
 		fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
 		vc->vc_video_erase_char = oldc;
 	}
-
-
-	lock_fb_info(info);
-	event.info = info;
-	event.data = &blank;
-	fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
-	unlock_fb_info(info);
 }
 
 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
@@ -3240,7 +3231,7 @@ int fbcon_fb_registered(struct fb_info *info)
 	return ret;
 }
 
-static void fbcon_fb_blanked(struct fb_info *info, int blank)
+void fbcon_fb_blanked(struct fb_info *info, int blank)
 {
 	struct fbcon_ops *ops = info->fbcon_par;
 	struct vc_data *vc;
@@ -3344,9 +3335,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 		con2fb = event->data;
 		con2fb->framebuffer = con2fb_map[con2fb->console - 1];
 		break;
-	case FB_EVENT_BLANK:
-		fbcon_fb_blanked(info, *(int *)event->data);
-		break;
 	case FB_EVENT_REMAP_ALL_CONSOLE:
 		idx = info->node;
 		fbcon_remap_all(idx);
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index ddc0c16b8bbf..9366fbe99a58 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1068,6 +1068,7 @@ fb_blank(struct fb_info *info, int blank)
 	event.data = &blank;
 
 	early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
+	fbcon_fb_blanked(info, blank);
 
 	if (info->fbops->fb_blank)
  		ret = info->fbops->fb_blank(blank, info);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 0d86aa31bf8d..1e66fac3124f 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -137,12 +137,10 @@ struct fb_cursor_user {
 #define FB_EVENT_GET_CONSOLE_MAP        0x07
 /*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
 #define FB_EVENT_SET_CONSOLE_MAP        0x08
-/*      A hardware display blank change occurred */
+/*      A display blank is requested       */
 #define FB_EVENT_BLANK                  0x09
 /*      Private modelist is to be replaced */
 #define FB_EVENT_MODE_CHANGE_ALL	0x0B
-/*	A software display blank change occurred */
-#define FB_EVENT_CONBLANK               0x0C
 /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
 #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
 /*      A hardware display blank early change occurred */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index 305e4f2eddac..d67d7ec51ef9 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -14,6 +14,7 @@ int fbcon_mode_deleted(struct fb_info *info,
 void fbcon_new_modelist(struct fb_info *info);
 void fbcon_get_requirement(struct fb_info *info,
 			   struct fb_blit_caps *caps);
+void fbcon_fb_blanked(struct fb_info *info, int blank);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
@@ -27,6 +28,7 @@ static inline int fbcon_mode_deleted(struct fb_info *info,
 static inline void fbcon_new_modelist(struct fb_info *info) {}
 static inline void fbcon_get_requirement(struct fb_info *info,
 					 struct fb_blit_caps *caps) {}
+static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 25/33] fbmem: pull fbcon_fb_blanked out of fb_blank
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst,
	Michał Mirosław, Peter Rosin, Hans de Goede,
	Mikulas Patocka, Rob Clark

There's a callchain of:

fbcon_fb_blanked -> do_(un)blank_screen -> consw->con_blank
	-> fbcon_blank -> fb_blank

Things don't go horribly wrong because the BKL console_lock safes the
day, but that's about it. And the seeming recursion is broken in 2
ways:
- Starting from the fbdev ioctl we set FBINFO_MISC_USEREVENT, which
  tells the fbcon_blank code to not call fb_blank. This was required
  to not deadlock when recursing on the fb_notifier_chain mutex.
- Starting from the con_blank hook we're getting saved by the
  console_blanked checks in do_blank/unblank_screen. Or at least
  that's my theory.

Anyway, recursion isn't awesome, so let's stop it. Breaking the
recursion avoids the need to be in the FBINFO_MISC_USEREVENT critical
section, so lets move it out of that too.

The astute reader will notice that fb_blank seems to require
lock_fb_info(), which the fbcon code seems to ignore. I have no idea
how to fix that problem, so let's keep ignoring it.

v2: I forgot the sysfs blanking code.

v3: Fix typo in callchain in the commmit message (Sam).

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Rob Clark <robdclark@gmail.com>
---
 drivers/video/fbdev/core/fbmem.c   | 4 +++-
 drivers/video/fbdev/core/fbsysfs.c | 8 ++++++--
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 9366fbe99a58..d6713dce9e31 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1068,7 +1068,6 @@ fb_blank(struct fb_info *info, int blank)
 	event.data = &blank;
 
 	early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
-	fbcon_fb_blanked(info, blank);
 
 	if (info->fbops->fb_blank)
  		ret = info->fbops->fb_blank(blank, info);
@@ -1198,6 +1197,9 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		info->flags |= FBINFO_MISC_USEREVENT;
 		ret = fb_blank(info, arg);
 		info->flags &= ~FBINFO_MISC_USEREVENT;
+
+		/* might again call into fb_blank */
+		fbcon_fb_blanked(info, arg);
 		unlock_fb_info(info);
 		console_unlock();
 		break;
diff --git a/drivers/video/fbdev/core/fbsysfs.c b/drivers/video/fbdev/core/fbsysfs.c
index 5f329278e55f..252d4f52d2a5 100644
--- a/drivers/video/fbdev/core/fbsysfs.c
+++ b/drivers/video/fbdev/core/fbsysfs.c
@@ -18,6 +18,7 @@
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/fb.h>
+#include <linux/fbcon.h>
 #include <linux/console.h>
 #include <linux/module.h>
 
@@ -305,12 +306,15 @@ static ssize_t store_blank(struct device *device,
 {
 	struct fb_info *fb_info = dev_get_drvdata(device);
 	char *last = NULL;
-	int err;
+	int err, arg;
 
+	arg = simple_strtoul(buf, &last, 0);
 	console_lock();
 	fb_info->flags |= FBINFO_MISC_USEREVENT;
-	err = fb_blank(fb_info, simple_strtoul(buf, &last, 0));
+	err = fb_blank(fb_info, arg);
 	fb_info->flags &= ~FBINFO_MISC_USEREVENT;
+	/* might again call into fb_blank */
+	fbcon_fb_blanked(fb_info, arg);
 	console_unlock();
 	if (err < 0)
 		return err;
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 25/33] fbmem: pull fbcon_fb_blanked out of fb_blank
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst,
	Michał Mirosław, Peter Rosin, Hans de Goede,
	Mikulas Patocka, Rob Clark

There's a callchain of:

fbcon_fb_blanked -> do_(un)blank_screen -> consw->con_blank
	-> fbcon_blank -> fb_blank

Things don't go horribly wrong because the BKL console_lock safes the
day, but that's about it. And the seeming recursion is broken in 2
ways:
- Starting from the fbdev ioctl we set FBINFO_MISC_USEREVENT, which
  tells the fbcon_blank code to not call fb_blank. This was required
  to not deadlock when recursing on the fb_notifier_chain mutex.
- Starting from the con_blank hook we're getting saved by the
  console_blanked checks in do_blank/unblank_screen. Or at least
  that's my theory.

Anyway, recursion isn't awesome, so let's stop it. Breaking the
recursion avoids the need to be in the FBINFO_MISC_USEREVENT critical
section, so lets move it out of that too.

The astute reader will notice that fb_blank seems to require
lock_fb_info(), which the fbcon code seems to ignore. I have no idea
how to fix that problem, so let's keep ignoring it.

v2: I forgot the sysfs blanking code.

v3: Fix typo in callchain in the commmit message (Sam).

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Rob Clark <robdclark@gmail.com>
---
 drivers/video/fbdev/core/fbmem.c   | 4 +++-
 drivers/video/fbdev/core/fbsysfs.c | 8 ++++++--
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 9366fbe99a58..d6713dce9e31 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1068,7 +1068,6 @@ fb_blank(struct fb_info *info, int blank)
 	event.data = &blank;
 
 	early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
-	fbcon_fb_blanked(info, blank);
 
 	if (info->fbops->fb_blank)
  		ret = info->fbops->fb_blank(blank, info);
@@ -1198,6 +1197,9 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		info->flags |= FBINFO_MISC_USEREVENT;
 		ret = fb_blank(info, arg);
 		info->flags &= ~FBINFO_MISC_USEREVENT;
+
+		/* might again call into fb_blank */
+		fbcon_fb_blanked(info, arg);
 		unlock_fb_info(info);
 		console_unlock();
 		break;
diff --git a/drivers/video/fbdev/core/fbsysfs.c b/drivers/video/fbdev/core/fbsysfs.c
index 5f329278e55f..252d4f52d2a5 100644
--- a/drivers/video/fbdev/core/fbsysfs.c
+++ b/drivers/video/fbdev/core/fbsysfs.c
@@ -18,6 +18,7 @@
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/fb.h>
+#include <linux/fbcon.h>
 #include <linux/console.h>
 #include <linux/module.h>
 
@@ -305,12 +306,15 @@ static ssize_t store_blank(struct device *device,
 {
 	struct fb_info *fb_info = dev_get_drvdata(device);
 	char *last = NULL;
-	int err;
+	int err, arg;
 
+	arg = simple_strtoul(buf, &last, 0);
 	console_lock();
 	fb_info->flags |= FBINFO_MISC_USEREVENT;
-	err = fb_blank(fb_info, simple_strtoul(buf, &last, 0));
+	err = fb_blank(fb_info, arg);
 	fb_info->flags &= ~FBINFO_MISC_USEREVENT;
+	/* might again call into fb_blank */
+	fbcon_fb_blanked(fb_info, arg);
 	console_unlock();
 	if (err < 0)
 		return err;
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 26/33] fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Yisheng Xie, Michał Mirosław, Peter Rosin,
	Mikulas Patocka, Rob Clark

With the recursion broken in the previous patch we can drop the
FBINFO_MISC_USEREVENT flag around calls to fb_blank - recursion
prevention was it's only job.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Rob Clark <robdclark@gmail.com>
---
 drivers/video/fbdev/core/fbcon.c   | 5 ++---
 drivers/video/fbdev/core/fbmem.c   | 3 ---
 drivers/video/fbdev/core/fbsysfs.c | 2 --
 3 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index a4617067ff24..b5ee89f16d6c 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -2386,9 +2386,8 @@ static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
 			fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
 			ops->cursor_flash = (!blank);
 
-			if (!(info->flags & FBINFO_MISC_USEREVENT))
-				if (fb_blank(info, blank))
-					fbcon_generic_blank(vc, info, blank);
+			if (fb_blank(info, blank))
+				fbcon_generic_blank(vc, info, blank);
 		}
 
 		if (!blank)
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index d6713dce9e31..25ae466ba593 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1194,10 +1194,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 	case FBIOBLANK:
 		console_lock();
 		lock_fb_info(info);
-		info->flags |= FBINFO_MISC_USEREVENT;
 		ret = fb_blank(info, arg);
-		info->flags &= ~FBINFO_MISC_USEREVENT;
-
 		/* might again call into fb_blank */
 		fbcon_fb_blanked(info, arg);
 		unlock_fb_info(info);
diff --git a/drivers/video/fbdev/core/fbsysfs.c b/drivers/video/fbdev/core/fbsysfs.c
index 252d4f52d2a5..882b471d619e 100644
--- a/drivers/video/fbdev/core/fbsysfs.c
+++ b/drivers/video/fbdev/core/fbsysfs.c
@@ -310,9 +310,7 @@ static ssize_t store_blank(struct device *device,
 
 	arg = simple_strtoul(buf, &last, 0);
 	console_lock();
-	fb_info->flags |= FBINFO_MISC_USEREVENT;
 	err = fb_blank(fb_info, arg);
-	fb_info->flags &= ~FBINFO_MISC_USEREVENT;
 	/* might again call into fb_blank */
 	fbcon_fb_blanked(fb_info, arg);
 	console_unlock();
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 26/33] fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Yisheng Xie, Michał Mirosław, Peter Rosin,
	Mikulas Patocka, Rob Clark

With the recursion broken in the previous patch we can drop the
FBINFO_MISC_USEREVENT flag around calls to fb_blank - recursion
prevention was it's only job.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Rob Clark <robdclark@gmail.com>
---
 drivers/video/fbdev/core/fbcon.c   | 5 ++---
 drivers/video/fbdev/core/fbmem.c   | 3 ---
 drivers/video/fbdev/core/fbsysfs.c | 2 --
 3 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index a4617067ff24..b5ee89f16d6c 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -2386,9 +2386,8 @@ static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
 			fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
 			ops->cursor_flash = (!blank);
 
-			if (!(info->flags & FBINFO_MISC_USEREVENT))
-				if (fb_blank(info, blank))
-					fbcon_generic_blank(vc, info, blank);
+			if (fb_blank(info, blank))
+				fbcon_generic_blank(vc, info, blank);
 		}
 
 		if (!blank)
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index d6713dce9e31..25ae466ba593 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1194,10 +1194,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 	case FBIOBLANK:
 		console_lock();
 		lock_fb_info(info);
-		info->flags |= FBINFO_MISC_USEREVENT;
 		ret = fb_blank(info, arg);
-		info->flags &= ~FBINFO_MISC_USEREVENT;
-
 		/* might again call into fb_blank */
 		fbcon_fb_blanked(info, arg);
 		unlock_fb_info(info);
diff --git a/drivers/video/fbdev/core/fbsysfs.c b/drivers/video/fbdev/core/fbsysfs.c
index 252d4f52d2a5..882b471d619e 100644
--- a/drivers/video/fbdev/core/fbsysfs.c
+++ b/drivers/video/fbdev/core/fbsysfs.c
@@ -310,9 +310,7 @@ static ssize_t store_blank(struct device *device,
 
 	arg = simple_strtoul(buf, &last, 0);
 	console_lock();
-	fb_info->flags |= FBINFO_MISC_USEREVENT;
 	err = fb_blank(fb_info, arg);
-	fb_info->flags &= ~FBINFO_MISC_USEREVENT;
 	/* might again call into fb_blank */
 	fbcon_fb_blanked(fb_info, arg);
 	console_unlock();
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 27/33] fb: Flatten control flow in fb_set_var
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst,
	Michał Mirosław, Peter Rosin, Hans de Goede,
	Mikulas Patocka

Instead of wiring almost everything down to the very last line using
goto soup (but not consistently, where would the fun be otherwise)
drop out early when checks fail. This allows us to flatten the huge
indent levels to just 1.

Aside: If a driver doesn't set ->fb_check_var, then FB_ACTIVATE_NOW
does nothing. This bug exists ever since this code was extracted as a
common helper in 2002, hence I decided against fixing it. Everyone
just better have a fb_check_var to make sure things work correctly.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
---
 drivers/video/fbdev/core/fbmem.c | 126 +++++++++++++++----------------
 1 file changed, 63 insertions(+), 63 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 25ae466ba593..96805fe85332 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -954,6 +954,9 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 {
 	int flags = info->flags;
 	int ret = 0;
+	u32 activate;
+	struct fb_var_screeninfo old_var;
+	struct fb_videomode mode;
 
 	if (var->activate & FB_ACTIVATE_INV_MODE) {
 		struct fb_videomode mode1, mode2;
@@ -970,87 +973,84 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 			fb_delete_videomode(&mode1, &info->modelist);
 
 
-		ret = (ret) ? -EINVAL : 0;
-		goto done;
+		return ret ? -EINVAL : 0;
 	}
 
-	if ((var->activate & FB_ACTIVATE_FORCE) ||
-	    memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
-		u32 activate = var->activate;
+	if (!(var->activate & FB_ACTIVATE_FORCE) &&
+	    !memcmp(&info->var, var, sizeof(struct fb_var_screeninfo)))
+		return 0;
 
-		/* When using FOURCC mode, make sure the red, green, blue and
-		 * transp fields are set to 0.
-		 */
-		if ((info->fix.capabilities & FB_CAP_FOURCC) &&
-		    var->grayscale > 1) {
-			if (var->red.offset     || var->green.offset    ||
-			    var->blue.offset    || var->transp.offset   ||
-			    var->red.length     || var->green.length    ||
-			    var->blue.length    || var->transp.length   ||
-			    var->red.msb_right  || var->green.msb_right ||
-			    var->blue.msb_right || var->transp.msb_right)
-				return -EINVAL;
-		}
+	activate = var->activate;
 
-		if (!info->fbops->fb_check_var) {
-			*var = info->var;
-			goto done;
-		}
+	/* When using FOURCC mode, make sure the red, green, blue and
+	 * transp fields are set to 0.
+	 */
+	if ((info->fix.capabilities & FB_CAP_FOURCC) &&
+	    var->grayscale > 1) {
+		if (var->red.offset     || var->green.offset    ||
+		    var->blue.offset    || var->transp.offset   ||
+		    var->red.length     || var->green.length    ||
+		    var->blue.length    || var->transp.length   ||
+		    var->red.msb_right  || var->green.msb_right ||
+		    var->blue.msb_right || var->transp.msb_right)
+			return -EINVAL;
+	}
 
-		ret = info->fbops->fb_check_var(var, info);
+	if (!info->fbops->fb_check_var) {
+		*var = info->var;
+		return 0;
+	}
 
-		if (ret)
-			goto done;
+	ret = info->fbops->fb_check_var(var, info);
 
-		if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
-			struct fb_var_screeninfo old_var;
-			struct fb_videomode mode;
+	if (ret)
+		return ret;
 
-			if (info->fbops->fb_get_caps) {
-				ret = fb_check_caps(info, var, activate);
+	if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_NOW)
+		return 0;
 
-				if (ret)
-					goto done;
-			}
+	if (info->fbops->fb_get_caps) {
+		ret = fb_check_caps(info, var, activate);
 
-			old_var = info->var;
-			info->var = *var;
+		if (ret)
+			return ret;
+	}
 
-			if (info->fbops->fb_set_par) {
-				ret = info->fbops->fb_set_par(info);
+	old_var = info->var;
+	info->var = *var;
 
-				if (ret) {
-					info->var = old_var;
-					printk(KERN_WARNING "detected "
-						"fb_set_par error, "
-						"error code: %d\n", ret);
-					goto done;
-				}
-			}
+	if (info->fbops->fb_set_par) {
+		ret = info->fbops->fb_set_par(info);
+
+		if (ret) {
+			info->var = old_var;
+			printk(KERN_WARNING "detected "
+				"fb_set_par error, "
+				"error code: %d\n", ret);
+			return ret;
+		}
+	}
 
-			fb_pan_display(info, &info->var);
-			fb_set_cmap(&info->cmap, info);
-			fb_var_to_videomode(&mode, &info->var);
+	fb_pan_display(info, &info->var);
+	fb_set_cmap(&info->cmap, info);
+	fb_var_to_videomode(&mode, &info->var);
 
-			if (info->modelist.prev && info->modelist.next &&
-			    !list_empty(&info->modelist))
-				ret = fb_add_videomode(&mode, &info->modelist);
+	if (info->modelist.prev && info->modelist.next &&
+	    !list_empty(&info->modelist))
+		ret = fb_add_videomode(&mode, &info->modelist);
 
-			if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
-				struct fb_event event;
-				int evnt = (activate & FB_ACTIVATE_ALL) ?
-					FB_EVENT_MODE_CHANGE_ALL :
-					FB_EVENT_MODE_CHANGE;
+	if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
+		struct fb_event event;
+		int evnt = (activate & FB_ACTIVATE_ALL) ?
+			FB_EVENT_MODE_CHANGE_ALL :
+			FB_EVENT_MODE_CHANGE;
 
-				info->flags &= ~FBINFO_MISC_USEREVENT;
-				event.info = info;
-				event.data = &mode;
-				fb_notifier_call_chain(evnt, &event);
-			}
-		}
+		info->flags &= ~FBINFO_MISC_USEREVENT;
+		event.info = info;
+		event.data = &mode;
+		fb_notifier_call_chain(evnt, &event);
 	}
 
- done:
 	return ret;
 }
 EXPORT_SYMBOL(fb_set_var);
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 27/33] fb: Flatten control flow in fb_set_var
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst,
	Michał Mirosław, Peter Rosin, Hans de Goede,
	Mikulas Patocka

Instead of wiring almost everything down to the very last line using
goto soup (but not consistently, where would the fun be otherwise)
drop out early when checks fail. This allows us to flatten the huge
indent levels to just 1.

Aside: If a driver doesn't set ->fb_check_var, then FB_ACTIVATE_NOW
does nothing. This bug exists ever since this code was extracted as a
common helper in 2002, hence I decided against fixing it. Everyone
just better have a fb_check_var to make sure things work correctly.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
---
 drivers/video/fbdev/core/fbmem.c | 126 +++++++++++++++----------------
 1 file changed, 63 insertions(+), 63 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 25ae466ba593..96805fe85332 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -954,6 +954,9 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 {
 	int flags = info->flags;
 	int ret = 0;
+	u32 activate;
+	struct fb_var_screeninfo old_var;
+	struct fb_videomode mode;
 
 	if (var->activate & FB_ACTIVATE_INV_MODE) {
 		struct fb_videomode mode1, mode2;
@@ -970,87 +973,84 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 			fb_delete_videomode(&mode1, &info->modelist);
 
 
-		ret = (ret) ? -EINVAL : 0;
-		goto done;
+		return ret ? -EINVAL : 0;
 	}
 
-	if ((var->activate & FB_ACTIVATE_FORCE) ||
-	    memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
-		u32 activate = var->activate;
+	if (!(var->activate & FB_ACTIVATE_FORCE) &&
+	    !memcmp(&info->var, var, sizeof(struct fb_var_screeninfo)))
+		return 0;
 
-		/* When using FOURCC mode, make sure the red, green, blue and
-		 * transp fields are set to 0.
-		 */
-		if ((info->fix.capabilities & FB_CAP_FOURCC) &&
-		    var->grayscale > 1) {
-			if (var->red.offset     || var->green.offset    ||
-			    var->blue.offset    || var->transp.offset   ||
-			    var->red.length     || var->green.length    ||
-			    var->blue.length    || var->transp.length   ||
-			    var->red.msb_right  || var->green.msb_right ||
-			    var->blue.msb_right || var->transp.msb_right)
-				return -EINVAL;
-		}
+	activate = var->activate;
 
-		if (!info->fbops->fb_check_var) {
-			*var = info->var;
-			goto done;
-		}
+	/* When using FOURCC mode, make sure the red, green, blue and
+	 * transp fields are set to 0.
+	 */
+	if ((info->fix.capabilities & FB_CAP_FOURCC) &&
+	    var->grayscale > 1) {
+		if (var->red.offset     || var->green.offset    ||
+		    var->blue.offset    || var->transp.offset   ||
+		    var->red.length     || var->green.length    ||
+		    var->blue.length    || var->transp.length   ||
+		    var->red.msb_right  || var->green.msb_right ||
+		    var->blue.msb_right || var->transp.msb_right)
+			return -EINVAL;
+	}
 
-		ret = info->fbops->fb_check_var(var, info);
+	if (!info->fbops->fb_check_var) {
+		*var = info->var;
+		return 0;
+	}
 
-		if (ret)
-			goto done;
+	ret = info->fbops->fb_check_var(var, info);
 
-		if ((var->activate & FB_ACTIVATE_MASK) = FB_ACTIVATE_NOW) {
-			struct fb_var_screeninfo old_var;
-			struct fb_videomode mode;
+	if (ret)
+		return ret;
 
-			if (info->fbops->fb_get_caps) {
-				ret = fb_check_caps(info, var, activate);
+	if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_NOW)
+		return 0;
 
-				if (ret)
-					goto done;
-			}
+	if (info->fbops->fb_get_caps) {
+		ret = fb_check_caps(info, var, activate);
 
-			old_var = info->var;
-			info->var = *var;
+		if (ret)
+			return ret;
+	}
 
-			if (info->fbops->fb_set_par) {
-				ret = info->fbops->fb_set_par(info);
+	old_var = info->var;
+	info->var = *var;
 
-				if (ret) {
-					info->var = old_var;
-					printk(KERN_WARNING "detected "
-						"fb_set_par error, "
-						"error code: %d\n", ret);
-					goto done;
-				}
-			}
+	if (info->fbops->fb_set_par) {
+		ret = info->fbops->fb_set_par(info);
+
+		if (ret) {
+			info->var = old_var;
+			printk(KERN_WARNING "detected "
+				"fb_set_par error, "
+				"error code: %d\n", ret);
+			return ret;
+		}
+	}
 
-			fb_pan_display(info, &info->var);
-			fb_set_cmap(&info->cmap, info);
-			fb_var_to_videomode(&mode, &info->var);
+	fb_pan_display(info, &info->var);
+	fb_set_cmap(&info->cmap, info);
+	fb_var_to_videomode(&mode, &info->var);
 
-			if (info->modelist.prev && info->modelist.next &&
-			    !list_empty(&info->modelist))
-				ret = fb_add_videomode(&mode, &info->modelist);
+	if (info->modelist.prev && info->modelist.next &&
+	    !list_empty(&info->modelist))
+		ret = fb_add_videomode(&mode, &info->modelist);
 
-			if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
-				struct fb_event event;
-				int evnt = (activate & FB_ACTIVATE_ALL) ?
-					FB_EVENT_MODE_CHANGE_ALL :
-					FB_EVENT_MODE_CHANGE;
+	if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
+		struct fb_event event;
+		int evnt = (activate & FB_ACTIVATE_ALL) ?
+			FB_EVENT_MODE_CHANGE_ALL :
+			FB_EVENT_MODE_CHANGE;
 
-				info->flags &= ~FBINFO_MISC_USEREVENT;
-				event.info = info;
-				event.data = &mode;
-				fb_notifier_call_chain(evnt, &event);
-			}
-		}
+		info->flags &= ~FBINFO_MISC_USEREVENT;
+		event.info = info;
+		event.data = &mode;
+		fb_notifier_call_chain(evnt, &event);
 	}
 
- done:
 	return ret;
 }
 EXPORT_SYMBOL(fb_set_var);
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 28/33] fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:02   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Sam Ravnborg, Daniel Vetter, Maarten Lankhorst, Lee Jones,
	Jingoo Han, Hans de Goede, Yisheng Xie,
	Michał Mirosław, Peter Rosin, Mikulas Patocka

Create a new wrapper function for this, feels like there's some
refactoring room here between the two modes.

v2: backlight notifier is also interested in the mode change event,
it calls lcd->set_mode, of which there are 3 implementations. Thanks
to Maarten for spotting this. So we keep that. We can ditch the differentiation
between mode change and all mode changes (because backlight notifier
doesn't care), and we can drop the FBINFO_MISC_USEREVENT stuff too,
because that's just to prevent recursion between fbmem.c and fbcon.c.

While at it flatten the control flow a bit.

v3: Need to add a static inline to the dummy function.

v4: Add missing #include <fbcon.h> to sh_mob (Sam).

Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/backlight/lcd.c          |  1 -
 drivers/video/fbdev/core/fbcon.c       | 15 +++++++++------
 drivers/video/fbdev/core/fbmem.c       | 21 ++++++++++-----------
 drivers/video/fbdev/sh_mobile_lcdcfb.c | 12 ++----------
 include/linux/fb.h                     |  2 --
 include/linux/fbcon.h                  |  2 ++
 6 files changed, 23 insertions(+), 30 deletions(-)

diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
index 151b18776add..ecdda06989d0 100644
--- a/drivers/video/backlight/lcd.c
+++ b/drivers/video/backlight/lcd.c
@@ -34,7 +34,6 @@ static int fb_notifier_callback(struct notifier_block *self,
 	switch (event) {
 	case FB_EVENT_BLANK:
 	case FB_EVENT_MODE_CHANGE:
-	case FB_EVENT_MODE_CHANGE_ALL:
 	case FB_EARLY_EVENT_BLANK:
 	case FB_R_EARLY_EVENT_BLANK:
 		break;
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index b5ee89f16d6c..e98551f96138 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3009,6 +3009,15 @@ static void fbcon_set_all_vcs(struct fb_info *info)
 		fbcon_modechanged(info);
 }
 
+
+void fbcon_update_vcs(struct fb_info *info, bool all)
+{
+	if (all)
+		fbcon_set_all_vcs(info);
+	else
+		fbcon_modechanged(info);
+}
+
 int fbcon_mode_deleted(struct fb_info *info,
 		       struct fb_videomode *mode)
 {
@@ -3318,12 +3327,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	int idx, ret = 0;
 
 	switch(action) {
-	case FB_EVENT_MODE_CHANGE:
-		fbcon_modechanged(info);
-		break;
-	case FB_EVENT_MODE_CHANGE_ALL:
-		fbcon_set_all_vcs(info);
-		break;
 	case FB_EVENT_SET_CONSOLE_MAP:
 		/* called with console lock held */
 		con2fb = event->data;
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 96805fe85332..dd1a708df1a7 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -957,6 +957,7 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 	u32 activate;
 	struct fb_var_screeninfo old_var;
 	struct fb_videomode mode;
+	struct fb_event event;
 
 	if (var->activate & FB_ACTIVATE_INV_MODE) {
 		struct fb_videomode mode1, mode2;
@@ -1039,19 +1040,17 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 	    !list_empty(&info->modelist))
 		ret = fb_add_videomode(&mode, &info->modelist);
 
-	if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
-		struct fb_event event;
-		int evnt = (activate & FB_ACTIVATE_ALL) ?
-			FB_EVENT_MODE_CHANGE_ALL :
-			FB_EVENT_MODE_CHANGE;
+	if (ret)
+		return ret;
 
-		info->flags &= ~FBINFO_MISC_USEREVENT;
-		event.info = info;
-		event.data = &mode;
-		fb_notifier_call_chain(evnt, &event);
-	}
+	event.info = info;
+	event.data = &mode;
+	fb_notifier_call_chain(FB_EVENT_MODE_CHANGE, &event);
 
-	return ret;
+	if (flags & FBINFO_MISC_USEREVENT)
+		fbcon_update_vcs(info, activate & FB_ACTIVATE_ALL);
+
+	return 0;
 }
 EXPORT_SYMBOL(fb_set_var);
 
diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
index 015a02a29d37..b8454424910d 100644
--- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
+++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
@@ -15,6 +15,7 @@
 #include <linux/ctype.h>
 #include <linux/dma-mapping.h>
 #include <linux/delay.h>
+#include <linux/fbcon.h>
 #include <linux/gpio.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
@@ -1757,8 +1758,6 @@ static void sh_mobile_fb_reconfig(struct fb_info *info)
 	struct sh_mobile_lcdc_chan *ch = info->par;
 	struct fb_var_screeninfo var;
 	struct fb_videomode mode;
-	struct fb_event event;
-	int evnt = FB_EVENT_MODE_CHANGE_ALL;
 
 	if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
 		/* More framebuffer users are active */
@@ -1780,14 +1779,7 @@ static void sh_mobile_fb_reconfig(struct fb_info *info)
 		/* Couldn't reconfigure, hopefully, can continue as before */
 		return;
 
-	/*
-	 * fb_set_var() calls the notifier change internally, only if
-	 * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
-	 * user event, we have to call the chain ourselves.
-	 */
-	event.info = info;
-	event.data = &ch->display.mode;
-	fb_notifier_call_chain(evnt, &event);
+	fbcon_update_vcs(info, true);
 }
 
 /*
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 1e66fac3124f..f9c212f9b661 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -139,8 +139,6 @@ struct fb_cursor_user {
 #define FB_EVENT_SET_CONSOLE_MAP        0x08
 /*      A display blank is requested       */
 #define FB_EVENT_BLANK                  0x09
-/*      Private modelist is to be replaced */
-#define FB_EVENT_MODE_CHANGE_ALL	0x0B
 /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
 #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
 /*      A hardware display blank early change occurred */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index d67d7ec51ef9..de31eeb22c97 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -15,6 +15,7 @@ void fbcon_new_modelist(struct fb_info *info);
 void fbcon_get_requirement(struct fb_info *info,
 			   struct fb_blit_caps *caps);
 void fbcon_fb_blanked(struct fb_info *info, int blank);
+void fbcon_update_vcs(struct fb_info *info, bool all);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
@@ -29,6 +30,7 @@ static inline void fbcon_new_modelist(struct fb_info *info) {}
 static inline void fbcon_get_requirement(struct fb_info *info,
 					 struct fb_blit_caps *caps) {}
 static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
+static inline void fbcon_update_vcs(struct fb_info *info, bool all) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 28/33] fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
@ 2019-05-28  9:02   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:02 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Sam Ravnborg, Daniel Vetter, Maarten Lankhorst, Lee Jones,
	Jingoo Han, Hans de Goede, Yisheng Xie,
	Michał Mirosław, Peter Rosin, Mikulas Patocka

Create a new wrapper function for this, feels like there's some
refactoring room here between the two modes.

v2: backlight notifier is also interested in the mode change event,
it calls lcd->set_mode, of which there are 3 implementations. Thanks
to Maarten for spotting this. So we keep that. We can ditch the differentiation
between mode change and all mode changes (because backlight notifier
doesn't care), and we can drop the FBINFO_MISC_USEREVENT stuff too,
because that's just to prevent recursion between fbmem.c and fbcon.c.

While at it flatten the control flow a bit.

v3: Need to add a static inline to the dummy function.

v4: Add missing #include <fbcon.h> to sh_mob (Sam).

Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/video/backlight/lcd.c          |  1 -
 drivers/video/fbdev/core/fbcon.c       | 15 +++++++++------
 drivers/video/fbdev/core/fbmem.c       | 21 ++++++++++-----------
 drivers/video/fbdev/sh_mobile_lcdcfb.c | 12 ++----------
 include/linux/fb.h                     |  2 --
 include/linux/fbcon.h                  |  2 ++
 6 files changed, 23 insertions(+), 30 deletions(-)

diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
index 151b18776add..ecdda06989d0 100644
--- a/drivers/video/backlight/lcd.c
+++ b/drivers/video/backlight/lcd.c
@@ -34,7 +34,6 @@ static int fb_notifier_callback(struct notifier_block *self,
 	switch (event) {
 	case FB_EVENT_BLANK:
 	case FB_EVENT_MODE_CHANGE:
-	case FB_EVENT_MODE_CHANGE_ALL:
 	case FB_EARLY_EVENT_BLANK:
 	case FB_R_EARLY_EVENT_BLANK:
 		break;
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index b5ee89f16d6c..e98551f96138 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3009,6 +3009,15 @@ static void fbcon_set_all_vcs(struct fb_info *info)
 		fbcon_modechanged(info);
 }
 
+
+void fbcon_update_vcs(struct fb_info *info, bool all)
+{
+	if (all)
+		fbcon_set_all_vcs(info);
+	else
+		fbcon_modechanged(info);
+}
+
 int fbcon_mode_deleted(struct fb_info *info,
 		       struct fb_videomode *mode)
 {
@@ -3318,12 +3327,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 	int idx, ret = 0;
 
 	switch(action) {
-	case FB_EVENT_MODE_CHANGE:
-		fbcon_modechanged(info);
-		break;
-	case FB_EVENT_MODE_CHANGE_ALL:
-		fbcon_set_all_vcs(info);
-		break;
 	case FB_EVENT_SET_CONSOLE_MAP:
 		/* called with console lock held */
 		con2fb = event->data;
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 96805fe85332..dd1a708df1a7 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -957,6 +957,7 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 	u32 activate;
 	struct fb_var_screeninfo old_var;
 	struct fb_videomode mode;
+	struct fb_event event;
 
 	if (var->activate & FB_ACTIVATE_INV_MODE) {
 		struct fb_videomode mode1, mode2;
@@ -1039,19 +1040,17 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 	    !list_empty(&info->modelist))
 		ret = fb_add_videomode(&mode, &info->modelist);
 
-	if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
-		struct fb_event event;
-		int evnt = (activate & FB_ACTIVATE_ALL) ?
-			FB_EVENT_MODE_CHANGE_ALL :
-			FB_EVENT_MODE_CHANGE;
+	if (ret)
+		return ret;
 
-		info->flags &= ~FBINFO_MISC_USEREVENT;
-		event.info = info;
-		event.data = &mode;
-		fb_notifier_call_chain(evnt, &event);
-	}
+	event.info = info;
+	event.data = &mode;
+	fb_notifier_call_chain(FB_EVENT_MODE_CHANGE, &event);
 
-	return ret;
+	if (flags & FBINFO_MISC_USEREVENT)
+		fbcon_update_vcs(info, activate & FB_ACTIVATE_ALL);
+
+	return 0;
 }
 EXPORT_SYMBOL(fb_set_var);
 
diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
index 015a02a29d37..b8454424910d 100644
--- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
+++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
@@ -15,6 +15,7 @@
 #include <linux/ctype.h>
 #include <linux/dma-mapping.h>
 #include <linux/delay.h>
+#include <linux/fbcon.h>
 #include <linux/gpio.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
@@ -1757,8 +1758,6 @@ static void sh_mobile_fb_reconfig(struct fb_info *info)
 	struct sh_mobile_lcdc_chan *ch = info->par;
 	struct fb_var_screeninfo var;
 	struct fb_videomode mode;
-	struct fb_event event;
-	int evnt = FB_EVENT_MODE_CHANGE_ALL;
 
 	if (ch->use_count > 1 || (ch->use_count = 1 && !info->fbcon_par))
 		/* More framebuffer users are active */
@@ -1780,14 +1779,7 @@ static void sh_mobile_fb_reconfig(struct fb_info *info)
 		/* Couldn't reconfigure, hopefully, can continue as before */
 		return;
 
-	/*
-	 * fb_set_var() calls the notifier change internally, only if
-	 * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
-	 * user event, we have to call the chain ourselves.
-	 */
-	event.info = info;
-	event.data = &ch->display.mode;
-	fb_notifier_call_chain(evnt, &event);
+	fbcon_update_vcs(info, true);
 }
 
 /*
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 1e66fac3124f..f9c212f9b661 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -139,8 +139,6 @@ struct fb_cursor_user {
 #define FB_EVENT_SET_CONSOLE_MAP        0x08
 /*      A display blank is requested       */
 #define FB_EVENT_BLANK                  0x09
-/*      Private modelist is to be replaced */
-#define FB_EVENT_MODE_CHANGE_ALL	0x0B
 /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
 #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
 /*      A hardware display blank early change occurred */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index d67d7ec51ef9..de31eeb22c97 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -15,6 +15,7 @@ void fbcon_new_modelist(struct fb_info *info);
 void fbcon_get_requirement(struct fb_info *info,
 			   struct fb_blit_caps *caps);
 void fbcon_fb_blanked(struct fb_info *info, int blank);
+void fbcon_update_vcs(struct fb_info *info, bool all);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
@@ -29,6 +30,7 @@ static inline void fbcon_new_modelist(struct fb_info *info) {}
 static inline void fbcon_get_requirement(struct fb_info *info,
 					 struct fb_blit_caps *caps) {}
 static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
+static inline void fbcon_update_vcs(struct fb_info *info, bool all) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 29/33] vgaswitcheroo: call fbcon_remap_all directly
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:03   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:03 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Lukas Wunner, Daniel Vetter, Sam Ravnborg, Maarten Lankhorst,
	David Airlie, Daniel Vetter, Maxime Ripard, Sean Paul,
	Hans de Goede, Yisheng Xie

While at it, clean up the interface a bit and push the console locking
into fbcon.c.

v2: Remove now outdated comment (Lukas).

v3: Forgot to add static inline to the dummy function.

Acked-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Sean Paul <sean@poorly.run>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/gpu/vga/vga_switcheroo.c | 11 +++--------
 drivers/video/fbdev/core/fbcon.c | 14 +++++---------
 include/linux/fb.h               |  2 --
 include/linux/fbcon.h            |  2 ++
 4 files changed, 10 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
index a132c37d7334..65d7541c413a 100644
--- a/drivers/gpu/vga/vga_switcheroo.c
+++ b/drivers/gpu/vga/vga_switcheroo.c
@@ -35,6 +35,7 @@
 #include <linux/debugfs.h>
 #include <linux/fb.h>
 #include <linux/fs.h>
+#include <linux/fbcon.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/pm_domain.h>
@@ -736,14 +737,8 @@ static int vga_switchto_stage2(struct vga_switcheroo_client *new_client)
 	if (!active->driver_power_control)
 		set_audio_state(active->id, VGA_SWITCHEROO_OFF);
 
-	if (new_client->fb_info) {
-		struct fb_event event;
-
-		console_lock();
-		event.info = new_client->fb_info;
-		fb_notifier_call_chain(FB_EVENT_REMAP_ALL_CONSOLE, &event);
-		console_unlock();
-	}
+	if (new_client->fb_info)
+		fbcon_remap_all(new_client->fb_info);
 
 	mutex_lock(&vgasr_priv.mux_hw_lock);
 	ret = vgasr_priv.handler->switchto(new_client->id);
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index e98551f96138..158b9d5233e1 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3149,17 +3149,16 @@ void fbcon_fb_unregistered(struct fb_info *info)
 		do_unregister_con_driver(&fb_con);
 }
 
-/* called with console_lock held */
-static void fbcon_remap_all(int idx)
+void fbcon_remap_all(struct fb_info *info)
 {
-	int i;
-
-	WARN_CONSOLE_UNLOCKED();
+	int i, idx = info->node;
 
+	console_lock();
 	if (deferred_takeover) {
 		for (i = first_fb_vc; i <= last_fb_vc; i++)
 			con2fb_map_boot[i] = idx;
 		fbcon_map_override();
+		console_unlock();
 		return;
 	}
 
@@ -3172,6 +3171,7 @@ static void fbcon_remap_all(int idx)
 		       first_fb_vc + 1, last_fb_vc + 1);
 		info_idx = idx;
 	}
+	console_unlock();
 }
 
 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
@@ -3337,10 +3337,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 		con2fb = event->data;
 		con2fb->framebuffer = con2fb_map[con2fb->console - 1];
 		break;
-	case FB_EVENT_REMAP_ALL_CONSOLE:
-		idx = info->node;
-		fbcon_remap_all(idx);
-		break;
 	}
 	return ret;
 }
diff --git a/include/linux/fb.h b/include/linux/fb.h
index f9c212f9b661..25e4b885f5b3 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -139,8 +139,6 @@ struct fb_cursor_user {
 #define FB_EVENT_SET_CONSOLE_MAP        0x08
 /*      A display blank is requested       */
 #define FB_EVENT_BLANK                  0x09
-/*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
-#define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
 /*      A hardware display blank early change occurred */
 #define FB_EARLY_EVENT_BLANK		0x10
 /*      A hardware display blank revert early change occurred */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index de31eeb22c97..69f900d289b2 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -16,6 +16,7 @@ void fbcon_get_requirement(struct fb_info *info,
 			   struct fb_blit_caps *caps);
 void fbcon_fb_blanked(struct fb_info *info, int blank);
 void fbcon_update_vcs(struct fb_info *info, bool all);
+void fbcon_remap_all(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
@@ -31,6 +32,7 @@ static inline void fbcon_get_requirement(struct fb_info *info,
 					 struct fb_blit_caps *caps) {}
 static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
 static inline void fbcon_update_vcs(struct fb_info *info, bool all) {}
+static inline void fbcon_remap_all(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 29/33] vgaswitcheroo: call fbcon_remap_all directly
@ 2019-05-28  9:03   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:03 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Lukas Wunner, Daniel Vetter, Sam Ravnborg, Maarten Lankhorst,
	David Airlie, Daniel Vetter, Maxime Ripard, Sean Paul,
	Hans de Goede, Yisheng Xie

While at it, clean up the interface a bit and push the console locking
into fbcon.c.

v2: Remove now outdated comment (Lukas).

v3: Forgot to add static inline to the dummy function.

Acked-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Sean Paul <sean@poorly.run>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: linux-fbdev@vger.kernel.org
---
 drivers/gpu/vga/vga_switcheroo.c | 11 +++--------
 drivers/video/fbdev/core/fbcon.c | 14 +++++---------
 include/linux/fb.h               |  2 --
 include/linux/fbcon.h            |  2 ++
 4 files changed, 10 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
index a132c37d7334..65d7541c413a 100644
--- a/drivers/gpu/vga/vga_switcheroo.c
+++ b/drivers/gpu/vga/vga_switcheroo.c
@@ -35,6 +35,7 @@
 #include <linux/debugfs.h>
 #include <linux/fb.h>
 #include <linux/fs.h>
+#include <linux/fbcon.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/pm_domain.h>
@@ -736,14 +737,8 @@ static int vga_switchto_stage2(struct vga_switcheroo_client *new_client)
 	if (!active->driver_power_control)
 		set_audio_state(active->id, VGA_SWITCHEROO_OFF);
 
-	if (new_client->fb_info) {
-		struct fb_event event;
-
-		console_lock();
-		event.info = new_client->fb_info;
-		fb_notifier_call_chain(FB_EVENT_REMAP_ALL_CONSOLE, &event);
-		console_unlock();
-	}
+	if (new_client->fb_info)
+		fbcon_remap_all(new_client->fb_info);
 
 	mutex_lock(&vgasr_priv.mux_hw_lock);
 	ret = vgasr_priv.handler->switchto(new_client->id);
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index e98551f96138..158b9d5233e1 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3149,17 +3149,16 @@ void fbcon_fb_unregistered(struct fb_info *info)
 		do_unregister_con_driver(&fb_con);
 }
 
-/* called with console_lock held */
-static void fbcon_remap_all(int idx)
+void fbcon_remap_all(struct fb_info *info)
 {
-	int i;
-
-	WARN_CONSOLE_UNLOCKED();
+	int i, idx = info->node;
 
+	console_lock();
 	if (deferred_takeover) {
 		for (i = first_fb_vc; i <= last_fb_vc; i++)
 			con2fb_map_boot[i] = idx;
 		fbcon_map_override();
+		console_unlock();
 		return;
 	}
 
@@ -3172,6 +3171,7 @@ static void fbcon_remap_all(int idx)
 		       first_fb_vc + 1, last_fb_vc + 1);
 		info_idx = idx;
 	}
+	console_unlock();
 }
 
 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
@@ -3337,10 +3337,6 @@ static int fbcon_event_notify(struct notifier_block *self,
 		con2fb = event->data;
 		con2fb->framebuffer = con2fb_map[con2fb->console - 1];
 		break;
-	case FB_EVENT_REMAP_ALL_CONSOLE:
-		idx = info->node;
-		fbcon_remap_all(idx);
-		break;
 	}
 	return ret;
 }
diff --git a/include/linux/fb.h b/include/linux/fb.h
index f9c212f9b661..25e4b885f5b3 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -139,8 +139,6 @@ struct fb_cursor_user {
 #define FB_EVENT_SET_CONSOLE_MAP        0x08
 /*      A display blank is requested       */
 #define FB_EVENT_BLANK                  0x09
-/*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
-#define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
 /*      A hardware display blank early change occurred */
 #define FB_EARLY_EVENT_BLANK		0x10
 /*      A hardware display blank revert early change occurred */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index de31eeb22c97..69f900d289b2 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -16,6 +16,7 @@ void fbcon_get_requirement(struct fb_info *info,
 			   struct fb_blit_caps *caps);
 void fbcon_fb_blanked(struct fb_info *info, int blank);
 void fbcon_update_vcs(struct fb_info *info, bool all);
+void fbcon_remap_all(struct fb_info *info);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
@@ -31,6 +32,7 @@ static inline void fbcon_get_requirement(struct fb_info *info,
 					 struct fb_blit_caps *caps) {}
 static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
 static inline void fbcon_update_vcs(struct fb_info *info, bool all) {}
+static inline void fbcon_remap_all(struct fb_info *info) {}
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 30/33] fbcon: Call con2fb_map functions directly
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:03   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:03 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Yisheng Xie, Michał Mirosław, Peter Rosin,
	Mikulas Patocka

These are actually fbcon ioctls which just happen to be exposed
through /dev/fb*. They completely ignore which fb_info they're called
on, and I think the userspace tool even hardcodes to /dev/fb0.

Hence just forward the entire thing to fbcon.c wholesale.

Note that this patch drops the fb_lock/unlock on the set side. Since
the ioctl can operate on any fb (as passed in through
con2fb.framebuffer) this is bogus. Also note that fbcon.c in general
never calls fb_lock on anything, so this has been badly broken
already.

With this the last user of the fbcon notifier callback is gone, and we
can garbage collect that too.

v2: add missing uaccess.h include (alpha fails to compile otherwise),
reported by kbuild.

v3: Remember to also drop the #defines (Maarten)

v4: Add the static inline to dummy functions.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Mikulas Patocka <mpatocka@redhat.com>
---
 drivers/video/fbdev/core/fbcon.c | 59 +++++++++++++++++++-------------
 drivers/video/fbdev/core/fbmem.c | 34 ++----------------
 include/linux/fb.h               |  4 ---
 include/linux/fbcon.h            |  4 +++
 4 files changed, 42 insertions(+), 59 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 158b9d5233e1..fbd28aeff307 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -76,6 +76,7 @@
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/crc32.h> /* For counting font checksums */
+#include <linux/uaccess.h>
 #include <asm/fb.h>
 #include <asm/irq.h>
 
@@ -3318,29 +3319,47 @@ void fbcon_get_requirement(struct fb_info *info,
 	}
 }
 
-static int fbcon_event_notify(struct notifier_block *self,
-			      unsigned long action, void *data)
+int fbcon_set_con2fb_map_ioctl(void __user *argp)
 {
-	struct fb_event *event = data;
-	struct fb_info *info = event->info;
-	struct fb_con2fbmap *con2fb;
-	int idx, ret = 0;
+	struct fb_con2fbmap con2fb;
+	int ret;
 
-	switch(action) {
-	case FB_EVENT_SET_CONSOLE_MAP:
-		/* called with console lock held */
-		con2fb = event->data;
-		ret = set_con2fb_map(con2fb->console - 1,
-				     con2fb->framebuffer, 1);
-		break;
-	case FB_EVENT_GET_CONSOLE_MAP:
-		con2fb = event->data;
-		con2fb->framebuffer = con2fb_map[con2fb->console - 1];
-		break;
+	if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
+		return -EFAULT;
+	if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
+		return -EINVAL;
+	if (con2fb.framebuffer >= FB_MAX)
+		return -EINVAL;
+	if (!registered_fb[con2fb.framebuffer])
+		request_module("fb%d", con2fb.framebuffer);
+	if (!registered_fb[con2fb.framebuffer]) {
+		return -EINVAL;
 	}
+
+	console_lock();
+	ret = set_con2fb_map(con2fb.console - 1,
+			     con2fb.framebuffer, 1);
+	console_unlock();
+
 	return ret;
 }
 
+int fbcon_get_con2fb_map_ioctl(void __user *argp)
+{
+	struct fb_con2fbmap con2fb;
+
+	if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
+		return -EFAULT;
+	if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
+		return -EINVAL;
+
+	console_lock();
+	con2fb.framebuffer = con2fb_map[con2fb.console - 1];
+	console_unlock();
+
+	return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
+}
+
 /*
  *  The console `switch' structure for the frame buffer based console
  */
@@ -3372,10 +3391,6 @@ static const struct consw fb_con = {
 	.con_debug_leave	= fbcon_debug_leave,
 };
 
-static struct notifier_block fbcon_event_notifier = {
-	.notifier_call	= fbcon_event_notify,
-};
-
 static ssize_t store_rotate(struct device *device,
 			    struct device_attribute *attr, const char *buf,
 			    size_t count)
@@ -3648,7 +3663,6 @@ void __init fb_console_init(void)
 	int i;
 
 	console_lock();
-	fb_register_client(&fbcon_event_notifier);
 	fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
 				     "fbcon");
 
@@ -3684,7 +3698,6 @@ static void __exit fbcon_deinit_device(void)
 void __exit fb_console_exit(void)
 {
 	console_lock();
-	fb_unregister_client(&fbcon_event_notifier);
 	fbcon_deinit_device();
 	device_destroy(fb_class, MKDEV(0, 0));
 	fbcon_exit();
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index dd1a708df1a7..64dd732021d8 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1092,10 +1092,8 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 	struct fb_ops *fb;
 	struct fb_var_screeninfo var;
 	struct fb_fix_screeninfo fix;
-	struct fb_con2fbmap con2fb;
 	struct fb_cmap cmap_from;
 	struct fb_cmap_user cmap;
-	struct fb_event event;
 	void __user *argp = (void __user *)arg;
 	long ret = 0;
 
@@ -1157,38 +1155,10 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		ret = -EINVAL;
 		break;
 	case FBIOGET_CON2FBMAP:
-		if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
-			return -EFAULT;
-		if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
-			return -EINVAL;
-		con2fb.framebuffer = -1;
-		event.data = &con2fb;
-		lock_fb_info(info);
-		event.info = info;
-		fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
-		unlock_fb_info(info);
-		ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
+		ret = fbcon_get_con2fb_map_ioctl(argp);
 		break;
 	case FBIOPUT_CON2FBMAP:
-		if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
-			return -EFAULT;
-		if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
-			return -EINVAL;
-		if (con2fb.framebuffer >= FB_MAX)
-			return -EINVAL;
-		if (!registered_fb[con2fb.framebuffer])
-			request_module("fb%d", con2fb.framebuffer);
-		if (!registered_fb[con2fb.framebuffer]) {
-			ret = -EINVAL;
-			break;
-		}
-		event.data = &con2fb;
-		console_lock();
-		lock_fb_info(info);
-		event.info = info;
-		ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event);
-		unlock_fb_info(info);
-		console_unlock();
+		ret = fbcon_set_con2fb_map_ioctl(argp);
 		break;
 	case FBIOBLANK:
 		console_lock();
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 25e4b885f5b3..303771264644 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -133,10 +133,6 @@ struct fb_cursor_user {
 #define FB_EVENT_FB_UNREGISTERED        0x06
 #endif
 
-/*      CONSOLE-SPECIFIC: get console to framebuffer mapping */
-#define FB_EVENT_GET_CONSOLE_MAP        0x07
-/*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
-#define FB_EVENT_SET_CONSOLE_MAP        0x08
 /*      A display blank is requested       */
 #define FB_EVENT_BLANK                  0x09
 /*      A hardware display blank early change occurred */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index 69f900d289b2..ff5596dd30f8 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -17,6 +17,8 @@ void fbcon_get_requirement(struct fb_info *info,
 void fbcon_fb_blanked(struct fb_info *info, int blank);
 void fbcon_update_vcs(struct fb_info *info, bool all);
 void fbcon_remap_all(struct fb_info *info);
+int fbcon_set_con2fb_map_ioctl(void __user *argp);
+int fbcon_get_con2fb_map_ioctl(void __user *argp);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
@@ -33,6 +35,8 @@ static inline void fbcon_get_requirement(struct fb_info *info,
 static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
 static inline void fbcon_update_vcs(struct fb_info *info, bool all) {}
 static inline void fbcon_remap_all(struct fb_info *info) {}
+static inline int fbcon_set_con2fb_map_ioctl(void __user *argp) { return 0; }
+static inline int fbcon_get_con2fb_map_ioctl(void __user *argp) { return 0; }
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 30/33] fbcon: Call con2fb_map functions directly
@ 2019-05-28  9:03   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:03 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Yisheng Xie, Michał Mirosław, Peter Rosin,
	Mikulas Patocka

These are actually fbcon ioctls which just happen to be exposed
through /dev/fb*. They completely ignore which fb_info they're called
on, and I think the userspace tool even hardcodes to /dev/fb0.

Hence just forward the entire thing to fbcon.c wholesale.

Note that this patch drops the fb_lock/unlock on the set side. Since
the ioctl can operate on any fb (as passed in through
con2fb.framebuffer) this is bogus. Also note that fbcon.c in general
never calls fb_lock on anything, so this has been badly broken
already.

With this the last user of the fbcon notifier callback is gone, and we
can garbage collect that too.

v2: add missing uaccess.h include (alpha fails to compile otherwise),
reported by kbuild.

v3: Remember to also drop the #defines (Maarten)

v4: Add the static inline to dummy functions.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Mikulas Patocka <mpatocka@redhat.com>
---
 drivers/video/fbdev/core/fbcon.c | 59 +++++++++++++++++++-------------
 drivers/video/fbdev/core/fbmem.c | 34 ++----------------
 include/linux/fb.h               |  4 ---
 include/linux/fbcon.h            |  4 +++
 4 files changed, 42 insertions(+), 59 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 158b9d5233e1..fbd28aeff307 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -76,6 +76,7 @@
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/crc32.h> /* For counting font checksums */
+#include <linux/uaccess.h>
 #include <asm/fb.h>
 #include <asm/irq.h>
 
@@ -3318,29 +3319,47 @@ void fbcon_get_requirement(struct fb_info *info,
 	}
 }
 
-static int fbcon_event_notify(struct notifier_block *self,
-			      unsigned long action, void *data)
+int fbcon_set_con2fb_map_ioctl(void __user *argp)
 {
-	struct fb_event *event = data;
-	struct fb_info *info = event->info;
-	struct fb_con2fbmap *con2fb;
-	int idx, ret = 0;
+	struct fb_con2fbmap con2fb;
+	int ret;
 
-	switch(action) {
-	case FB_EVENT_SET_CONSOLE_MAP:
-		/* called with console lock held */
-		con2fb = event->data;
-		ret = set_con2fb_map(con2fb->console - 1,
-				     con2fb->framebuffer, 1);
-		break;
-	case FB_EVENT_GET_CONSOLE_MAP:
-		con2fb = event->data;
-		con2fb->framebuffer = con2fb_map[con2fb->console - 1];
-		break;
+	if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
+		return -EFAULT;
+	if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
+		return -EINVAL;
+	if (con2fb.framebuffer >= FB_MAX)
+		return -EINVAL;
+	if (!registered_fb[con2fb.framebuffer])
+		request_module("fb%d", con2fb.framebuffer);
+	if (!registered_fb[con2fb.framebuffer]) {
+		return -EINVAL;
 	}
+
+	console_lock();
+	ret = set_con2fb_map(con2fb.console - 1,
+			     con2fb.framebuffer, 1);
+	console_unlock();
+
 	return ret;
 }
 
+int fbcon_get_con2fb_map_ioctl(void __user *argp)
+{
+	struct fb_con2fbmap con2fb;
+
+	if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
+		return -EFAULT;
+	if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
+		return -EINVAL;
+
+	console_lock();
+	con2fb.framebuffer = con2fb_map[con2fb.console - 1];
+	console_unlock();
+
+	return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
+}
+
 /*
  *  The console `switch' structure for the frame buffer based console
  */
@@ -3372,10 +3391,6 @@ static const struct consw fb_con = {
 	.con_debug_leave	= fbcon_debug_leave,
 };
 
-static struct notifier_block fbcon_event_notifier = {
-	.notifier_call	= fbcon_event_notify,
-};
-
 static ssize_t store_rotate(struct device *device,
 			    struct device_attribute *attr, const char *buf,
 			    size_t count)
@@ -3648,7 +3663,6 @@ void __init fb_console_init(void)
 	int i;
 
 	console_lock();
-	fb_register_client(&fbcon_event_notifier);
 	fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
 				     "fbcon");
 
@@ -3684,7 +3698,6 @@ static void __exit fbcon_deinit_device(void)
 void __exit fb_console_exit(void)
 {
 	console_lock();
-	fb_unregister_client(&fbcon_event_notifier);
 	fbcon_deinit_device();
 	device_destroy(fb_class, MKDEV(0, 0));
 	fbcon_exit();
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index dd1a708df1a7..64dd732021d8 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1092,10 +1092,8 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 	struct fb_ops *fb;
 	struct fb_var_screeninfo var;
 	struct fb_fix_screeninfo fix;
-	struct fb_con2fbmap con2fb;
 	struct fb_cmap cmap_from;
 	struct fb_cmap_user cmap;
-	struct fb_event event;
 	void __user *argp = (void __user *)arg;
 	long ret = 0;
 
@@ -1157,38 +1155,10 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 		ret = -EINVAL;
 		break;
 	case FBIOGET_CON2FBMAP:
-		if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
-			return -EFAULT;
-		if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
-			return -EINVAL;
-		con2fb.framebuffer = -1;
-		event.data = &con2fb;
-		lock_fb_info(info);
-		event.info = info;
-		fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
-		unlock_fb_info(info);
-		ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
+		ret = fbcon_get_con2fb_map_ioctl(argp);
 		break;
 	case FBIOPUT_CON2FBMAP:
-		if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
-			return -EFAULT;
-		if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
-			return -EINVAL;
-		if (con2fb.framebuffer >= FB_MAX)
-			return -EINVAL;
-		if (!registered_fb[con2fb.framebuffer])
-			request_module("fb%d", con2fb.framebuffer);
-		if (!registered_fb[con2fb.framebuffer]) {
-			ret = -EINVAL;
-			break;
-		}
-		event.data = &con2fb;
-		console_lock();
-		lock_fb_info(info);
-		event.info = info;
-		ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event);
-		unlock_fb_info(info);
-		console_unlock();
+		ret = fbcon_set_con2fb_map_ioctl(argp);
 		break;
 	case FBIOBLANK:
 		console_lock();
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 25e4b885f5b3..303771264644 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -133,10 +133,6 @@ struct fb_cursor_user {
 #define FB_EVENT_FB_UNREGISTERED        0x06
 #endif
 
-/*      CONSOLE-SPECIFIC: get console to framebuffer mapping */
-#define FB_EVENT_GET_CONSOLE_MAP        0x07
-/*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
-#define FB_EVENT_SET_CONSOLE_MAP        0x08
 /*      A display blank is requested       */
 #define FB_EVENT_BLANK                  0x09
 /*      A hardware display blank early change occurred */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index 69f900d289b2..ff5596dd30f8 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -17,6 +17,8 @@ void fbcon_get_requirement(struct fb_info *info,
 void fbcon_fb_blanked(struct fb_info *info, int blank);
 void fbcon_update_vcs(struct fb_info *info, bool all);
 void fbcon_remap_all(struct fb_info *info);
+int fbcon_set_con2fb_map_ioctl(void __user *argp);
+int fbcon_get_con2fb_map_ioctl(void __user *argp);
 #else
 static inline void fb_console_init(void) {}
 static inline void fb_console_exit(void) {}
@@ -33,6 +35,8 @@ static inline void fbcon_get_requirement(struct fb_info *info,
 static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
 static inline void fbcon_update_vcs(struct fb_info *info, bool all) {}
 static inline void fbcon_remap_all(struct fb_info *info) {}
+static inline int fbcon_set_con2fb_map_ioctl(void __user *argp) { return 0; }
+static inline int fbcon_get_con2fb_map_ioctl(void __user *argp) { return 0; }
 #endif
 
 #endif /* _LINUX_FBCON_H */
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 31/33] fbcon: Document what I learned about fbcon locking
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:03   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:03 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Yisheng Xie

It's not pretty.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
---
 drivers/video/fbdev/core/fbcon.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index fbd28aeff307..d6ba3610ee83 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -88,6 +88,25 @@
 #  define DPRINTK(fmt, args...)
 #endif
 
+/*
+ * FIXME: Locking
+ *
+ * - fbcon state itself is protected by the console_lock, and the code does a
+ *   pretty good job at making sure that lock is held everywhere it's needed.
+ *
+ * - access to the registered_fb array is entirely unprotected. This should use
+ *   proper object lifetime handling, i.e. get/put_fb_info. This also means
+ *   switching from indices to proper pointers for fb_info everywhere.
+ *
+ * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it
+ *   means concurrent access to the same fbdev from both fbcon and userspace
+ *   will blow up. To fix this all fbcon calls from fbmem.c need to be moved out
+ *   of fb_lock/unlock protected sections, since otherwise we'll recurse and
+ *   deadlock eventually. Aside: Due to these deadlock issues the fbdev code in
+ *   fbmem.c cannot use locking asserts, and there's lots of callers which get
+ *   the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too.
+ */
+
 enum {
 	FBCON_LOGO_CANSHOW	= -1,	/* the logo can be shown */
 	FBCON_LOGO_DRAW		= -2,	/* draw the logo to a console */
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 31/33] fbcon: Document what I learned about fbcon locking
@ 2019-05-28  9:03   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:03 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Hans de Goede,
	Yisheng Xie

It's not pretty.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Yisheng Xie <ysxie@foxmail.com>
---
 drivers/video/fbdev/core/fbcon.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index fbd28aeff307..d6ba3610ee83 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -88,6 +88,25 @@
 #  define DPRINTK(fmt, args...)
 #endif
 
+/*
+ * FIXME: Locking
+ *
+ * - fbcon state itself is protected by the console_lock, and the code does a
+ *   pretty good job at making sure that lock is held everywhere it's needed.
+ *
+ * - access to the registered_fb array is entirely unprotected. This should use
+ *   proper object lifetime handling, i.e. get/put_fb_info. This also means
+ *   switching from indices to proper pointers for fb_info everywhere.
+ *
+ * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it
+ *   means concurrent access to the same fbdev from both fbcon and userspace
+ *   will blow up. To fix this all fbcon calls from fbmem.c need to be moved out
+ *   of fb_lock/unlock protected sections, since otherwise we'll recurse and
+ *   deadlock eventually. Aside: Due to these deadlock issues the fbdev code in
+ *   fbmem.c cannot use locking asserts, and there's lots of callers which get
+ *   the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too.
+ */
+
 enum {
 	FBCON_LOGO_CANSHOW	= -1,	/* the logo can be shown */
 	FBCON_LOGO_DRAW		= -2,	/* draw the logo to a console */
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 32/33] staging/olpc_dcon: Add drm conversion to TODO
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:03   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:03 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Greg Kroah-Hartman,
	Maarten Lankhorst, Jens Frederich, Daniel Drake, Jon Nettleton

this driver is pretty horrible from a design pov, and needs a complete
overhaul. Concrete thing that annoys me is that it looks at
registered_fb, which is an internal thing to fbmem.c and fbcon.c. And
ofc it gets the lifetime rules all wrong (it should at least use
get/put_fb_info).

Looking at the history, there's been an attempt at dropping this from
staging in 2016, but that had to be reverted. Since then not real
effort except the usual stream of trivial patches, and fbdev has been
formally closed for any new hw support. Time to try again and drop
this?

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jens Frederich <jfrederich@gmail.com>
Cc: Daniel Drake <dsd@laptop.org>
Cc: Jon Nettleton <jon.nettleton@gmail.com>
---
 drivers/staging/olpc_dcon/TODO | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/staging/olpc_dcon/TODO b/drivers/staging/olpc_dcon/TODO
index 665a0b061719..fe09efbc7f77 100644
--- a/drivers/staging/olpc_dcon/TODO
+++ b/drivers/staging/olpc_dcon/TODO
@@ -1,4 +1,11 @@
 TODO:
+	- complete rewrite:
+	  1. The underlying fbdev drivers need to be converted into drm kernel
+	     modesetting drivers.
+	  2. The dcon low-power display mode can then be integrated using the
+	     drm damage tracking and self-refresh helpers.
+	  This bolted-on self-refresh support that digs around in fbdev
+	  internals, but isn't properly integrated, is not the correct solution.
 	- see if vx855 gpio API can be made similar enough to cs5535 so we can
 	  share more code
 	- convert all uses of the old GPIO API from <linux/gpio.h> to the
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 32/33] staging/olpc_dcon: Add drm conversion to TODO
@ 2019-05-28  9:03   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:03 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Greg Kroah-Hartman,
	Maarten Lankhorst, Jens Frederich, Daniel Drake, Jon Nettleton

this driver is pretty horrible from a design pov, and needs a complete
overhaul. Concrete thing that annoys me is that it looks at
registered_fb, which is an internal thing to fbmem.c and fbcon.c. And
ofc it gets the lifetime rules all wrong (it should at least use
get/put_fb_info).

Looking at the history, there's been an attempt at dropping this from
staging in 2016, but that had to be reverted. Since then not real
effort except the usual stream of trivial patches, and fbdev has been
formally closed for any new hw support. Time to try again and drop
this?

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jens Frederich <jfrederich@gmail.com>
Cc: Daniel Drake <dsd@laptop.org>
Cc: Jon Nettleton <jon.nettleton@gmail.com>
---
 drivers/staging/olpc_dcon/TODO | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/staging/olpc_dcon/TODO b/drivers/staging/olpc_dcon/TODO
index 665a0b061719..fe09efbc7f77 100644
--- a/drivers/staging/olpc_dcon/TODO
+++ b/drivers/staging/olpc_dcon/TODO
@@ -1,4 +1,11 @@
 TODO:
+	- complete rewrite:
+	  1. The underlying fbdev drivers need to be converted into drm kernel
+	     modesetting drivers.
+	  2. The dcon low-power display mode can then be integrated using the
+	     drm damage tracking and self-refresh helpers.
+	  This bolted-on self-refresh support that digs around in fbdev
+	  internals, but isn't properly integrated, is not the correct solution.
 	- see if vx855 gpio API can be made similar enough to cs5535 so we can
 	  share more code
 	- convert all uses of the old GPIO API from <linux/gpio.h> to the
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 33/33] backlight: simplify lcd notifier
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-05-28  9:03   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:03 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Lee Jones,
	Jingoo Han

With all the work I've done on replacing fb notifier calls with direct
calls into fbcon the backlight/lcd notifier is the only user left.

It will only receive events now that it cares about, hence we can
remove this check.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Jingoo Han <jingoohan1@gmail.com>
---
 drivers/video/backlight/lcd.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
index ecdda06989d0..d6b653aa4ee9 100644
--- a/drivers/video/backlight/lcd.c
+++ b/drivers/video/backlight/lcd.c
@@ -30,17 +30,6 @@ static int fb_notifier_callback(struct notifier_block *self,
 	struct lcd_device *ld;
 	struct fb_event *evdata = data;
 
-	/* If we aren't interested in this event, skip it immediately ... */
-	switch (event) {
-	case FB_EVENT_BLANK:
-	case FB_EVENT_MODE_CHANGE:
-	case FB_EARLY_EVENT_BLANK:
-	case FB_R_EARLY_EVENT_BLANK:
-		break;
-	default:
-		return 0;
-	}
-
 	ld = container_of(self, struct lcd_device, fb_notif);
 	if (!ld->ops)
 		return 0;
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 33/33] backlight: simplify lcd notifier
@ 2019-05-28  9:03   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-28  9:03 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development, linux-fbdev,
	Daniel Thompson, Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Lee Jones,
	Jingoo Han

With all the work I've done on replacing fb notifier calls with direct
calls into fbcon the backlight/lcd notifier is the only user left.

It will only receive events now that it cares about, hence we can
remove this check.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Jingoo Han <jingoohan1@gmail.com>
---
 drivers/video/backlight/lcd.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
index ecdda06989d0..d6b653aa4ee9 100644
--- a/drivers/video/backlight/lcd.c
+++ b/drivers/video/backlight/lcd.c
@@ -30,17 +30,6 @@ static int fb_notifier_callback(struct notifier_block *self,
 	struct lcd_device *ld;
 	struct fb_event *evdata = data;
 
-	/* If we aren't interested in this event, skip it immediately ... */
-	switch (event) {
-	case FB_EVENT_BLANK:
-	case FB_EVENT_MODE_CHANGE:
-	case FB_EARLY_EVENT_BLANK:
-	case FB_R_EARLY_EVENT_BLANK:
-		break;
-	default:
-		return 0;
-	}
-
 	ld = container_of(self, struct lcd_device, fb_notif);
 	if (!ld->ops)
 		return 0;
-- 
2.20.1

^ permalink raw reply	[flat|nested] 117+ messages in thread

* ✗ Fi.CI.CHECKPATCH: warning for fbcon notifier begone v3!
  2019-05-28  9:02 ` Daniel Vetter
                   ` (33 preceding siblings ...)
  (?)
@ 2019-05-28 12:22 ` Patchwork
  -1 siblings, 0 replies; 117+ messages in thread
From: Patchwork @ 2019-05-28 12:22 UTC (permalink / raw)
  To: Daniel Vetter; +Cc: intel-gfx

== Series Details ==

Series: fbcon notifier begone v3!
URL   : https://patchwork.freedesktop.org/series/61236/
State : warning

== Summary ==

$ dim checkpatch origin/drm-tip
cebafaf0747f dummycon: Sprinkle locking checks
-:47: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 23 lines checked
5000d1a85eb9 fbdev: locking check for fb_set_suspend
-:36: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 8 lines checked
73a9c408d921 vt: might_sleep() annotation for do_blank_screen
-:35: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 8 lines checked
2fe968835e01 vt: More locking checks
-:73: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 38 lines checked
9045c1cf5f58 fbdev/sa1100fb: Remove dead code
-:54: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 35 lines checked
fb04604a990f fbdev/cyber2000: Remove struct display
-:25: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 7 lines checked
a5d036e0043d fbdev/aty128fb: Remove dead code
-:90: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 70 lines checked
ecb66f11a1ff fbcon: s/struct display/struct fbcon_display/
-:272: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#272: FILE: drivers/video/fbdev/core/fbcon.c:2117:
+static void updatescrollmode(struct fbcon_display *p,
 					struct fb_info *info,

-:386: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 1 checks, 317 lines checked
6619af25a649 fbcon: Remove fbcon_has_exited
-:11: ERROR:GIT_COMMIT_ID: Please use git commit description style 'commit <12+ chars of sha1> ("<title line>")' - ie: 'commit 6104c37094e7 ("fbcon: Make fbcon a built-time depency for fbdev")'
#11: 
commit 6104c37094e729f3d4ce65797002112735d49cd1

-:47: WARNING:TYPO_SPELLING: 'unecessary' may be misspelled - perhaps 'unnecessary'?
#47: 
v4: Drop unecessary assignment - I forgot to delete the first

-:96: WARNING:SUSPECT_CODE_INDENT: suspect code indent for conditional statements (8, 12)
#96: FILE: drivers/video/fbdev/core/fbcon.c:1065:
+	if (WARN_ON(info_idx == -1))
 	    return;

-:206: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 1 errors, 3 warnings, 0 checks, 126 lines checked
9c083d2fe70b fbcon: call fbcon_fb_(un)registered directly
-:11: ERROR:GIT_COMMIT_ID: Please use git commit description style 'commit <12+ chars of sha1> ("<title line>")' - ie: 'commit 6104c37094e7 ("fbcon: Make fbcon a built-time depency for fbdev")'
#11: 
commit 6104c37094e729f3d4ce65797002112735d49cd1

-:157: WARNING:LINE_SPACING: Missing a blank line after declarations
#157: FILE: drivers/video/fbdev/core/fbmem.c:1728:
+		struct fb_event event;
+		event.info = fb_info;

-:192: WARNING:LINE_SPACING: Missing a blank line after declarations
#192: FILE: drivers/video/fbdev/core/fbmem.c:1799:
+		struct fb_event event;
+		event.info = fb_info;

-:239: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 1 errors, 3 warnings, 0 checks, 147 lines checked
4c21aa249801 fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
eb70d4d8e8aa fbdev/omap: sysfs files can't disappear before the device is gone
1584f5ae09d8 fbdev: sysfs files can't disappear before the device is gone
af9609593c5c staging/olpc: lock_fb_info can't fail
910c1d3d79d1 fbdev/atyfb: lock_fb_info can't fail
095e29b74dcb fbdev: lock_fb_info cannot fail
-:11: ERROR:GIT_COMMIT_ID: Please use git commit description style 'commit <12+ chars of sha1> ("<title line>")' - ie: 'commit c47747fde931 ("fbmem: make read/write/ioctl use the frame buffer at open time")'
#11: 
commit c47747fde931c02455683bd00ea43eaa62f35b0e

-:309: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 1 errors, 1 warnings, 0 checks, 212 lines checked
7196319b6849 fbcon: call fbcon_fb_bind directly
-:162: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 107 lines checked
ea0add94a6f8 fbdev: make unregister/unlink functions not fail
-:286: CHECK:AVOID_EXTERNS: extern prototypes should be avoided in .h files
#286: FILE: include/linux/fb.h:637:
+extern void unregister_framebuffer(struct fb_info *fb_info);

-:287: CHECK:AVOID_EXTERNS: extern prototypes should be avoided in .h files
#287: FILE: include/linux/fb.h:638:
+extern void unlink_framebuffer(struct fb_info *fb_info);

-:290: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 2 checks, 226 lines checked
3b19fc0d21c7 fbdev: unify unlink_framebuffer paths
-:97: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 63 lines checked
84de4f9c2755 fbdev/sh_mob: Remove fb notifier callback
-:21: ERROR:GIT_COMMIT_ID: Please use git commit description style 'commit <12+ chars of sha1> ("<title line>")' - ie: 'commit 6011bdeaa608 ("fbdev: sh-mobile: HDMI support for SH-Mobile SoCs")'
#21: 
commit 6011bdeaa6089d49c02de69f05980da7bad314ab

-:109: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 1 errors, 1 warnings, 0 checks, 62 lines checked
0eaa16d29535 fbdev: directly call fbcon_suspended/resumed
-:130: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 77 lines checked
b351897540f0 fbcon: Call fbcon_mode_deleted/new_modelist directly
-:184: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 123 lines checked
e4c80c40a227 fbdev: Call fbcon_get_requirement directly
-:120: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 68 lines checked
fa63f0d73787 Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
-:138: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 80 lines checked
8941f3518144 fbmem: pull fbcon_fb_blanked out of fb_blank
-:89: WARNING:CONSIDER_KSTRTO: simple_strtoul is obsolete, use kstrtoul instead
#89: FILE: drivers/video/fbdev/core/fbsysfs.c:311:
+	arg = simple_strtoul(buf, &last, 0);

-:99: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 2 warnings, 0 checks, 40 lines checked
c4bd61863f2c fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
-:69: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 30 lines checked
f73271c8e0e0 fb: Flatten control flow in fb_set_var
-:143: WARNING:PREFER_PR_LEVEL: Prefer [subsystem eg: netdev]_warn([subsystem]dev, ... then dev_warn(dev, ... then pr_warn(...  to printk(KERN_WARNING ...
#143: FILE: drivers/video/fbdev/core/fbmem.c:1027:
+			printk(KERN_WARNING "detected "

-:190: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 2 warnings, 0 checks, 156 lines checked
378342f5ee3d fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
-:14: WARNING:COMMIT_LOG_LONG_LINE: Possible unwrapped commit description (prefer a maximum 75 chars per line)
#14: 
to Maarten for spotting this. So we keep that. We can ditch the differentiation

-:62: CHECK:LINE_SPACING: Please don't use multiple blank lines
#62: FILE: drivers/video/fbdev/core/fbcon.c:3012:
 
+

-:197: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 2 warnings, 1 checks, 121 lines checked
ddc3c7ae909a vgaswitcheroo: call fbcon_remap_all directly
-:134: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 83 lines checked
95b855ff5fac fbcon: Call con2fb_map functions directly
-:89: WARNING:BRACES: braces {} are not necessary for single statement blocks
#89: FILE: drivers/video/fbdev/core/fbcon.c:3335:
+	if (!registered_fb[con2fb.framebuffer]) {
+		return -EINVAL;
 	}

-:239: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 2 warnings, 0 checks, 171 lines checked
6afee4b9c1ce fbcon: Document what I learned about fbcon locking
-:45: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 25 lines checked
0f33b49ca081 staging/olpc_dcon: Add drm conversion to TODO
-:42: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 11 lines checked
7f004a757694 backlight: simplify lcd notifier
-:40: WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Daniel Vetter <daniel.vetter@ffwll.ch>'

total: 0 errors, 1 warnings, 0 checks, 17 lines checked

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 117+ messages in thread

* ✗ Fi.CI.SPARSE: warning for fbcon notifier begone v3!
  2019-05-28  9:02 ` Daniel Vetter
                   ` (34 preceding siblings ...)
  (?)
@ 2019-05-28 12:36 ` Patchwork
  -1 siblings, 0 replies; 117+ messages in thread
From: Patchwork @ 2019-05-28 12:36 UTC (permalink / raw)
  To: Daniel Vetter; +Cc: intel-gfx

== Series Details ==

Series: fbcon notifier begone v3!
URL   : https://patchwork.freedesktop.org/series/61236/
State : warning

== Summary ==

$ dim sparse origin/drm-tip
Sparse version: v0.5.2
Commit: dummycon: Sprinkle locking checks
Okay!

Commit: fbdev: locking check for fb_set_suspend
Okay!

Commit: vt: might_sleep() annotation for do_blank_screen
Okay!

Commit: vt: More locking checks
Okay!

Commit: fbdev/sa1100fb: Remove dead code
Okay!

Commit: fbdev/cyber2000: Remove struct display
Okay!

Commit: fbdev/aty128fb: Remove dead code
Okay!

Commit: fbcon: s/struct display/struct fbcon_display/
Okay!

Commit: fbcon: Remove fbcon_has_exited
Okay!

Commit: fbcon: call fbcon_fb_(un)registered directly
Okay!

Commit: fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
Okay!

Commit: fbdev/omap: sysfs files can't disappear before the device is gone
Okay!

Commit: fbdev: sysfs files can't disappear before the device is gone
Okay!

Commit: staging/olpc: lock_fb_info can't fail
Okay!

Commit: fbdev/atyfb: lock_fb_info can't fail
Okay!

Commit: fbdev: lock_fb_info cannot fail
Okay!

Commit: fbcon: call fbcon_fb_bind directly
Okay!

Commit: fbdev: make unregister/unlink functions not fail
Okay!

Commit: fbdev: unify unlink_framebuffer paths
Okay!

Commit: fbdev/sh_mob: Remove fb notifier callback
Okay!

Commit: fbdev: directly call fbcon_suspended/resumed
Okay!

Commit: fbcon: Call fbcon_mode_deleted/new_modelist directly
Okay!

Commit: fbdev: Call fbcon_get_requirement directly
Okay!

Commit: Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
Okay!

Commit: fbmem: pull fbcon_fb_blanked out of fb_blank
Okay!

Commit: fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
Okay!

Commit: fb: Flatten control flow in fb_set_var
Okay!

Commit: fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
Okay!

Commit: vgaswitcheroo: call fbcon_remap_all directly
Okay!

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 117+ messages in thread

* ✓ Fi.CI.BAT: success for fbcon notifier begone v3!
  2019-05-28  9:02 ` Daniel Vetter
                   ` (35 preceding siblings ...)
  (?)
@ 2019-05-28 12:41 ` Patchwork
  -1 siblings, 0 replies; 117+ messages in thread
From: Patchwork @ 2019-05-28 12:41 UTC (permalink / raw)
  To: Daniel Vetter; +Cc: intel-gfx

== Series Details ==

Series: fbcon notifier begone v3!
URL   : https://patchwork.freedesktop.org/series/61236/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_6155 -> Patchwork_13112
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  External URL: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/

Known issues
------------

  Here are the changes found in Patchwork_13112 that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@i915_selftest@live_contexts:
    - fi-bdw-gvtdvm:      [PASS][1] -> [DMESG-FAIL][2] ([fdo#110235])
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/fi-bdw-gvtdvm/igt@i915_selftest@live_contexts.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/fi-bdw-gvtdvm/igt@i915_selftest@live_contexts.html

  
#### Possible fixes ####

  * igt@amdgpu/amd_basic@userptr:
    - fi-kbl-8809g:       [DMESG-WARN][3] ([fdo#108965]) -> [PASS][4]
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/fi-kbl-8809g/igt@amdgpu/amd_basic@userptr.html
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/fi-kbl-8809g/igt@amdgpu/amd_basic@userptr.html

  * igt@gem_ctx_switch@basic-default:
    - {fi-icl-guc}:       [INCOMPLETE][5] ([fdo#107713] / [fdo#108569]) -> [PASS][6]
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/fi-icl-guc/igt@gem_ctx_switch@basic-default.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/fi-icl-guc/igt@gem_ctx_switch@basic-default.html

  * {igt@gem_exec_basic@basic-all}:
    - fi-icl-u2:          [INCOMPLETE][7] ([fdo#107713]) -> [PASS][8]
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/fi-icl-u2/igt@gem_exec_basic@basic-all.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/fi-icl-u2/igt@gem_exec_basic@basic-all.html

  * igt@gem_render_tiled_blits@basic:
    - fi-icl-u3:          [DMESG-WARN][9] ([fdo#107724]) -> [PASS][10]
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/fi-icl-u3/igt@gem_render_tiled_blits@basic.html
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/fi-icl-u3/igt@gem_render_tiled_blits@basic.html

  * igt@i915_pm_rpm@module-reload:
    - fi-skl-6770hq:      [FAIL][11] ([fdo#108511]) -> [PASS][12]
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/fi-skl-6770hq/igt@i915_pm_rpm@module-reload.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/fi-skl-6770hq/igt@i915_pm_rpm@module-reload.html

  * igt@i915_selftest@live_hangcheck:
    - {fi-skl-guc}:       [DMESG-FAIL][13] ([fdo#108593]) -> [PASS][14]
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/fi-skl-guc/igt@i915_selftest@live_hangcheck.html
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/fi-skl-guc/igt@i915_selftest@live_hangcheck.html
    - fi-skl-iommu:       [INCOMPLETE][15] ([fdo#108602] / [fdo#108744]) -> [PASS][16]
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/fi-skl-iommu/igt@i915_selftest@live_hangcheck.html
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/fi-skl-iommu/igt@i915_selftest@live_hangcheck.html

  * igt@kms_frontbuffer_tracking@basic:
    - {fi-icl-dsi}:       [FAIL][17] ([fdo#103167]) -> [PASS][18]
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/fi-icl-dsi/igt@kms_frontbuffer_tracking@basic.html
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/fi-icl-dsi/igt@kms_frontbuffer_tracking@basic.html

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [fdo#103167]: https://bugs.freedesktop.org/show_bug.cgi?id=103167
  [fdo#107713]: https://bugs.freedesktop.org/show_bug.cgi?id=107713
  [fdo#107724]: https://bugs.freedesktop.org/show_bug.cgi?id=107724
  [fdo#108511]: https://bugs.freedesktop.org/show_bug.cgi?id=108511
  [fdo#108569]: https://bugs.freedesktop.org/show_bug.cgi?id=108569
  [fdo#108593]: https://bugs.freedesktop.org/show_bug.cgi?id=108593
  [fdo#108602]: https://bugs.freedesktop.org/show_bug.cgi?id=108602
  [fdo#108744]: https://bugs.freedesktop.org/show_bug.cgi?id=108744
  [fdo#108965]: https://bugs.freedesktop.org/show_bug.cgi?id=108965
  [fdo#110235]: https://bugs.freedesktop.org/show_bug.cgi?id=110235


Participating hosts (52 -> 47)
------------------------------

  Additional (2): fi-kbl-7567u fi-kbl-7500u 
  Missing    (7): fi-kbl-soraka fi-ilk-m540 fi-hsw-4200u fi-byt-squawks fi-bsw-cyan fi-byt-clapper fi-bdw-samus 


Build changes
-------------

  * Linux: CI_DRM_6155 -> Patchwork_13112

  CI_DRM_6155: d0bb2128055eccd0939c91f8546bb15d6adb82dc @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_5018: 7dadebb49b15373ec55af89cce0df0e8f40a7178 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_13112: 7f004a7576943ece0720cdb895d442040c58cf45 @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

7f004a757694 backlight: simplify lcd notifier
0f33b49ca081 staging/olpc_dcon: Add drm conversion to TODO
6afee4b9c1ce fbcon: Document what I learned about fbcon locking
95b855ff5fac fbcon: Call con2fb_map functions directly
ddc3c7ae909a vgaswitcheroo: call fbcon_remap_all directly
378342f5ee3d fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
f73271c8e0e0 fb: Flatten control flow in fb_set_var
c4bd61863f2c fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
8941f3518144 fbmem: pull fbcon_fb_blanked out of fb_blank
fa63f0d73787 Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
e4c80c40a227 fbdev: Call fbcon_get_requirement directly
b351897540f0 fbcon: Call fbcon_mode_deleted/new_modelist directly
0eaa16d29535 fbdev: directly call fbcon_suspended/resumed
84de4f9c2755 fbdev/sh_mob: Remove fb notifier callback
3b19fc0d21c7 fbdev: unify unlink_framebuffer paths
ea0add94a6f8 fbdev: make unregister/unlink functions not fail
7196319b6849 fbcon: call fbcon_fb_bind directly
095e29b74dcb fbdev: lock_fb_info cannot fail
910c1d3d79d1 fbdev/atyfb: lock_fb_info can't fail
af9609593c5c staging/olpc: lock_fb_info can't fail
1584f5ae09d8 fbdev: sysfs files can't disappear before the device is gone
eb70d4d8e8aa fbdev/omap: sysfs files can't disappear before the device is gone
4c21aa249801 fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
9c083d2fe70b fbcon: call fbcon_fb_(un)registered directly
6619af25a649 fbcon: Remove fbcon_has_exited
ecb66f11a1ff fbcon: s/struct display/struct fbcon_display/
a5d036e0043d fbdev/aty128fb: Remove dead code
fb04604a990f fbdev/cyber2000: Remove struct display
9045c1cf5f58 fbdev/sa1100fb: Remove dead code
2fe968835e01 vt: More locking checks
73a9c408d921 vt: might_sleep() annotation for do_blank_screen
5000d1a85eb9 fbdev: locking check for fb_set_suspend
cebafaf0747f dummycon: Sprinkle locking checks

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 117+ messages in thread

* ✓ Fi.CI.IGT: success for fbcon notifier begone v3!
  2019-05-28  9:02 ` Daniel Vetter
                   ` (36 preceding siblings ...)
  (?)
@ 2019-05-28 18:11 ` Patchwork
  -1 siblings, 0 replies; 117+ messages in thread
From: Patchwork @ 2019-05-28 18:11 UTC (permalink / raw)
  To: Daniel Vetter; +Cc: intel-gfx

== Series Details ==

Series: fbcon notifier begone v3!
URL   : https://patchwork.freedesktop.org/series/61236/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_6155_full -> Patchwork_13112_full
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  

Known issues
------------

  Here are the changes found in Patchwork_13112_full that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_ctx_isolation@bcs0-s3:
    - shard-kbl:          [PASS][1] -> [DMESG-WARN][2] ([fdo#108566]) +3 similar issues
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-kbl6/igt@gem_ctx_isolation@bcs0-s3.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-kbl4/igt@gem_ctx_isolation@bcs0-s3.html

  * igt@gem_workarounds@suspend-resume:
    - shard-apl:          [PASS][3] -> [DMESG-WARN][4] ([fdo#108566]) +5 similar issues
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-apl3/igt@gem_workarounds@suspend-resume.html
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-apl7/igt@gem_workarounds@suspend-resume.html

  * igt@i915_pm_rpm@modeset-lpsp:
    - shard-skl:          [PASS][5] -> [INCOMPLETE][6] ([fdo#107807]) +1 similar issue
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-skl7/igt@i915_pm_rpm@modeset-lpsp.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-skl5/igt@i915_pm_rpm@modeset-lpsp.html

  * igt@kms_cursor_edge_walk@pipe-a-128x128-right-edge:
    - shard-hsw:          [PASS][7] -> [INCOMPLETE][8] ([fdo#103540])
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-hsw5/igt@kms_cursor_edge_walk@pipe-a-128x128-right-edge.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-hsw2/igt@kms_cursor_edge_walk@pipe-a-128x128-right-edge.html

  * igt@kms_cursor_legacy@2x-long-flip-vs-cursor-atomic:
    - shard-hsw:          [PASS][9] -> [SKIP][10] ([fdo#109271]) +16 similar issues
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-hsw7/igt@kms_cursor_legacy@2x-long-flip-vs-cursor-atomic.html
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-hsw1/igt@kms_cursor_legacy@2x-long-flip-vs-cursor-atomic.html

  * igt@kms_flip@flip-vs-expired-vblank-interruptible:
    - shard-skl:          [PASS][11] -> [FAIL][12] ([fdo#105363])
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-skl8/igt@kms_flip@flip-vs-expired-vblank-interruptible.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-skl3/igt@kms_flip@flip-vs-expired-vblank-interruptible.html

  * igt@kms_flip@flip-vs-suspend:
    - shard-skl:          [PASS][13] -> [INCOMPLETE][14] ([fdo#109507]) +1 similar issue
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-skl10/igt@kms_flip@flip-vs-suspend.html
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-skl6/igt@kms_flip@flip-vs-suspend.html

  * igt@kms_frontbuffer_tracking@fbcpsr-suspend:
    - shard-skl:          [PASS][15] -> [INCOMPLETE][16] ([fdo#104108] / [fdo#106978])
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-skl10/igt@kms_frontbuffer_tracking@fbcpsr-suspend.html
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-skl7/igt@kms_frontbuffer_tracking@fbcpsr-suspend.html

  * igt@kms_plane@plane-panning-bottom-right-suspend-pipe-a-planes:
    - shard-skl:          [PASS][17] -> [INCOMPLETE][18] ([fdo#104108])
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-skl1/igt@kms_plane@plane-panning-bottom-right-suspend-pipe-a-planes.html
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-skl1/igt@kms_plane@plane-panning-bottom-right-suspend-pipe-a-planes.html

  * igt@kms_setmode@basic:
    - shard-skl:          [PASS][19] -> [FAIL][20] ([fdo#99912])
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-skl9/igt@kms_setmode@basic.html
   [20]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-skl8/igt@kms_setmode@basic.html

  
#### Possible fixes ####

  * igt@gem_mmap_gtt@hang:
    - {shard-iclb}:       [FAIL][21] ([fdo#109677]) -> [PASS][22]
   [21]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-iclb2/igt@gem_mmap_gtt@hang.html
   [22]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-iclb5/igt@gem_mmap_gtt@hang.html

  * igt@i915_pm_rpm@gem-execbuf:
    - {shard-iclb}:       [INCOMPLETE][23] ([fdo#107713] / [fdo#108840]) -> [PASS][24]
   [23]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-iclb2/igt@i915_pm_rpm@gem-execbuf.html
   [24]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-iclb6/igt@i915_pm_rpm@gem-execbuf.html

  * igt@i915_selftest@live_contexts:
    - shard-snb:          [INCOMPLETE][25] ([fdo#105411]) -> [PASS][26]
   [25]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-snb6/igt@i915_selftest@live_contexts.html
   [26]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-snb1/igt@i915_selftest@live_contexts.html

  * igt@kms_cursor_crc@pipe-b-cursor-128x128-random:
    - shard-skl:          [FAIL][27] ([fdo#103232]) -> [PASS][28]
   [27]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-skl4/igt@kms_cursor_crc@pipe-b-cursor-128x128-random.html
   [28]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-skl6/igt@kms_cursor_crc@pipe-b-cursor-128x128-random.html

  * igt@kms_cursor_legacy@2x-long-flip-vs-cursor-atomic:
    - shard-glk:          [FAIL][29] ([fdo#104873]) -> [PASS][30]
   [29]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-glk5/igt@kms_cursor_legacy@2x-long-flip-vs-cursor-atomic.html
   [30]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-glk3/igt@kms_cursor_legacy@2x-long-flip-vs-cursor-atomic.html

  * igt@kms_flip@2x-plain-flip-ts-check-interruptible:
    - shard-hsw:          [SKIP][31] ([fdo#109271]) -> [PASS][32] +20 similar issues
   [31]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-hsw1/igt@kms_flip@2x-plain-flip-ts-check-interruptible.html
   [32]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-hsw6/igt@kms_flip@2x-plain-flip-ts-check-interruptible.html

  * igt@kms_flip@flip-vs-expired-vblank:
    - shard-glk:          [FAIL][33] ([fdo#102887] / [fdo#105363]) -> [PASS][34]
   [33]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-glk1/igt@kms_flip@flip-vs-expired-vblank.html
   [34]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-glk5/igt@kms_flip@flip-vs-expired-vblank.html

  * igt@kms_frontbuffer_tracking@fbc-1p-offscren-pri-shrfb-draw-pwrite:
    - {shard-iclb}:       [FAIL][35] ([fdo#103167]) -> [PASS][36] +6 similar issues
   [35]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-iclb4/igt@kms_frontbuffer_tracking@fbc-1p-offscren-pri-shrfb-draw-pwrite.html
   [36]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-iclb8/igt@kms_frontbuffer_tracking@fbc-1p-offscren-pri-shrfb-draw-pwrite.html

  * igt@kms_plane_alpha_blend@pipe-c-constant-alpha-min:
    - shard-skl:          [FAIL][37] ([fdo#108145]) -> [PASS][38] +1 similar issue
   [37]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-skl6/igt@kms_plane_alpha_blend@pipe-c-constant-alpha-min.html
   [38]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-skl7/igt@kms_plane_alpha_blend@pipe-c-constant-alpha-min.html

  * igt@kms_psr@psr2_cursor_plane_onoff:
    - {shard-iclb}:       [SKIP][39] ([fdo#109441]) -> [PASS][40] +3 similar issues
   [39]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-iclb8/igt@kms_psr@psr2_cursor_plane_onoff.html
   [40]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-iclb2/igt@kms_psr@psr2_cursor_plane_onoff.html

  * igt@kms_vblank@pipe-c-ts-continuation-suspend:
    - shard-apl:          [DMESG-WARN][41] ([fdo#108566]) -> [PASS][42] +4 similar issues
   [41]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-apl8/igt@kms_vblank@pipe-c-ts-continuation-suspend.html
   [42]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-apl2/igt@kms_vblank@pipe-c-ts-continuation-suspend.html

  * igt@perf_pmu@rc6:
    - shard-kbl:          [SKIP][43] ([fdo#109271]) -> [PASS][44]
   [43]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-kbl7/igt@perf_pmu@rc6.html
   [44]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-kbl2/igt@perf_pmu@rc6.html

  
#### Warnings ####

  * igt@gem_exec_schedule@preempt-hang-bsd2:
    - shard-apl:          [SKIP][45] ([fdo#109271]) -> [INCOMPLETE][46] ([fdo#103927])
   [45]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-apl7/igt@gem_exec_schedule@preempt-hang-bsd2.html
   [46]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-apl3/igt@gem_exec_schedule@preempt-hang-bsd2.html

  * igt@gem_tiled_swapping@non-threaded:
    - shard-hsw:          [FAIL][47] ([fdo#108686]) -> [INCOMPLETE][48] ([fdo#103540])
   [47]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-hsw2/igt@gem_tiled_swapping@non-threaded.html
   [48]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-hsw1/igt@gem_tiled_swapping@non-threaded.html

  * igt@i915_pm_rpm@modeset-non-lpsp:
    - shard-skl:          [SKIP][49] ([fdo#109271]) -> [INCOMPLETE][50] ([fdo#107807])
   [49]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-skl10/igt@i915_pm_rpm@modeset-non-lpsp.html
   [50]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-skl1/igt@i915_pm_rpm@modeset-non-lpsp.html

  * igt@kms_ccs@pipe-b-ccs-on-another-bo:
    - shard-hsw:          [SKIP][51] ([fdo#109271]) -> [INCOMPLETE][52] ([fdo#103540])
   [51]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-hsw6/igt@kms_ccs@pipe-b-ccs-on-another-bo.html
   [52]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-hsw7/igt@kms_ccs@pipe-b-ccs-on-another-bo.html

  * igt@prime_vgem@sync-bsd1:
    - shard-snb:          [INCOMPLETE][53] ([fdo#105411]) -> [FAIL][54] ([fdo#110764])
   [53]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6155/shard-snb7/igt@prime_vgem@sync-bsd1.html
   [54]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/shard-snb2/igt@prime_vgem@sync-bsd1.html

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [fdo#100047]: https://bugs.freedesktop.org/show_bug.cgi?id=100047
  [fdo#102887]: https://bugs.freedesktop.org/show_bug.cgi?id=102887
  [fdo#103167]: https://bugs.freedesktop.org/show_bug.cgi?id=103167
  [fdo#103232]: https://bugs.freedesktop.org/show_bug.cgi?id=103232
  [fdo#103540]: https://bugs.freedesktop.org/show_bug.cgi?id=103540
  [fdo#103927]: https://bugs.freedesktop.org/show_bug.cgi?id=103927
  [fdo#104108]: https://bugs.freedesktop.org/show_bug.cgi?id=104108
  [fdo#104873]: https://bugs.freedesktop.org/show_bug.cgi?id=104873
  [fdo#105363]: https://bugs.freedesktop.org/show_bug.cgi?id=105363
  [fdo#105411]: https://bugs.freedesktop.org/show_bug.cgi?id=105411
  [fdo#106978]: https://bugs.freedesktop.org/show_bug.cgi?id=106978
  [fdo#107713]: https://bugs.freedesktop.org/show_bug.cgi?id=107713
  [fdo#107807]: https://bugs.freedesktop.org/show_bug.cgi?id=107807
  [fdo#108145]: https://bugs.freedesktop.org/show_bug.cgi?id=108145
  [fdo#108566]: https://bugs.freedesktop.org/show_bug.cgi?id=108566
  [fdo#108686]: https://bugs.freedesktop.org/show_bug.cgi?id=108686
  [fdo#108840]: https://bugs.freedesktop.org/show_bug.cgi?id=108840
  [fdo#109100]: https://bugs.freedesktop.org/show_bug.cgi?id=109100
  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [fdo#109441]: https://bugs.freedesktop.org/show_bug.cgi?id=109441
  [fdo#109507]: https://bugs.freedesktop.org/show_bug.cgi?id=109507
  [fdo#109642]: https://bugs.freedesktop.org/show_bug.cgi?id=109642
  [fdo#109673]: https://bugs.freedesktop.org/show_bug.cgi?id=109673
  [fdo#109677]: https://bugs.freedesktop.org/show_bug.cgi?id=109677
  [fdo#110764]: https://bugs.freedesktop.org/show_bug.cgi?id=110764
  [fdo#99912]: https://bugs.freedesktop.org/show_bug.cgi?id=99912


Participating hosts (10 -> 10)
------------------------------

  No changes in participating hosts


Build changes
-------------

  * Linux: CI_DRM_6155 -> Patchwork_13112

  CI_DRM_6155: d0bb2128055eccd0939c91f8546bb15d6adb82dc @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_5018: 7dadebb49b15373ec55af89cce0df0e8f40a7178 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_13112: 7f004a7576943ece0720cdb895d442040c58cf45 @ git://anongit.freedesktop.org/gfx-ci/linux
  piglit_4509: fdc5a4ca11124ab8413c7988896eec4c97336694 @ git://anongit.freedesktop.org/piglit

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_13112/
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 00/33] fbcon notifier begone v3!
  2019-05-28  9:02 ` Daniel Vetter
@ 2019-06-06  7:38   ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-06-06  7:38 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development,
	Linux Fbdev development list, Daniel Thompson,
	Bartlomiej Zolnierkiewicz, Daniel Vetter

Hi Bart,

On Tue, May 28, 2019 at 11:02:31AM +0200, Daniel Vetter wrote:
> Hi all,
>
> I think we're slowly getting there. Previous cover letters with more
> context:
>
> https://lists.freedesktop.org/archives/dri-devel/2019-May/218362.html
>
> tldr; I have a multi-year plan to improve fbcon locking, because the
> current thing is a bit a mess.
>
> Cover letter of this version, where I detail a bit more the details
> fixed in this one here:
>
> https://lists.freedesktop.org/archives/dri-devel/2019-May/218984.html
>
> Note that the locking plan in this one is already outdated, I overlooked a
> few fun issues around any printk() going back to console_lock.
>
> I think remaining bits:
>
> - Ack from Daniel Thompson for the backlight bits, he wanted to check the
>   big picture.

I think Daniel is still on vacation until next week or so.

> - Hash out actual merge plan.

I'd like to stuff this into drm.git somehow, I guess topic branch works
too.

Long term I think we need to reconsider how we handle fbdev, at least the
core/fbcon pieces. Since a few years all the work in that area has been
motivated by drm, and pushed by drm contributors. Having that maintained
in a separate tree that doesn't regularly integrate imo doesn't make much
sense, and we ended up merging almost everything through some drm tree.
That one time we didn't (for some panel rotation stuff) it resulted in
some good suprises.

I think best solution is if we put the core and fbcon bits into drm-misc,
as group maintained infrastructure piece. All the other gfx infra pieces
are maintained in there already too. You'd obviously get commit rights.
I think that would include
- drivers/video/fbdev
- drivers/video/*c
- drivers/video/console

I don't really care about what happens with the actual fbdev drivers
(aside from the drm one in drm_fb_helper.c, but that's already maintained
as part of drm). I guess we could also put those into drm-misc, or as a
separate tree, depending what you want.

Thoughts?

Cheers, Daniel


>
> I'm also cc'ing the entire pile to a lot more people on request.
>
> Thanks, Daniel
>
> Daniel Vetter (33):
>   dummycon: Sprinkle locking checks
>   fbdev: locking check for fb_set_suspend
>   vt: might_sleep() annotation for do_blank_screen
>   vt: More locking checks
>   fbdev/sa1100fb: Remove dead code
>   fbdev/cyber2000: Remove struct display
>   fbdev/aty128fb: Remove dead code
>   fbcon: s/struct display/struct fbcon_display/
>   fbcon: Remove fbcon_has_exited
>   fbcon: call fbcon_fb_(un)registered directly
>   fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
>   fbdev/omap: sysfs files can't disappear before the device is gone
>   fbdev: sysfs files can't disappear before the device is gone
>   staging/olpc: lock_fb_info can't fail
>   fbdev/atyfb: lock_fb_info can't fail
>   fbdev: lock_fb_info cannot fail
>   fbcon: call fbcon_fb_bind directly
>   fbdev: make unregister/unlink functions not fail
>   fbdev: unify unlink_framebuffer paths
>   fbdev/sh_mob: Remove fb notifier callback
>   fbdev: directly call fbcon_suspended/resumed
>   fbcon: Call fbcon_mode_deleted/new_modelist directly
>   fbdev: Call fbcon_get_requirement directly
>   Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
>   fbmem: pull fbcon_fb_blanked out of fb_blank
>   fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
>   fb: Flatten control flow in fb_set_var
>   fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
>   vgaswitcheroo: call fbcon_remap_all directly
>   fbcon: Call con2fb_map functions directly
>   fbcon: Document what I learned about fbcon locking
>   staging/olpc_dcon: Add drm conversion to TODO
>   backlight: simplify lcd notifier
>
>  arch/arm/mach-pxa/am200epd.c                  |  13 +-
>  drivers/gpu/vga/vga_switcheroo.c              |  11 +-
>  drivers/media/pci/ivtv/ivtvfb.c               |   6 +-
>  drivers/staging/fbtft/fbtft-core.c            |   4 +-
>  drivers/staging/olpc_dcon/TODO                |   7 +
>  drivers/staging/olpc_dcon/olpc_dcon.c         |   6 +-
>  drivers/tty/vt/vt.c                           |  18 +
>  drivers/video/backlight/backlight.c           |   2 +-
>  drivers/video/backlight/lcd.c                 |  12 -
>  drivers/video/console/dummycon.c              |   6 +
>  drivers/video/fbdev/aty/aty128fb.c            |  64 ---
>  drivers/video/fbdev/aty/atyfb_base.c          |   3 +-
>  drivers/video/fbdev/core/fbcmap.c             |   6 +-
>  drivers/video/fbdev/core/fbcon.c              | 313 ++++++--------
>  drivers/video/fbdev/core/fbcon.h              |   6 +-
>  drivers/video/fbdev/core/fbmem.c              | 399 +++++++-----------
>  drivers/video/fbdev/core/fbsysfs.c            |  20 +-
>  drivers/video/fbdev/cyber2000fb.c             |   1 -
>  drivers/video/fbdev/neofb.c                   |   9 +-
>  .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   |  21 +-
>  drivers/video/fbdev/sa1100fb.c                |  25 --
>  drivers/video/fbdev/savage/savagefb_driver.c  |   9 +-
>  drivers/video/fbdev/sh_mobile_lcdcfb.c        | 132 +-----
>  drivers/video/fbdev/sh_mobile_lcdcfb.h        |   5 -
>  include/linux/console_struct.h                |   5 +-
>  include/linux/fb.h                            |  45 +-
>  include/linux/fbcon.h                         |  30 ++
>  27 files changed, 396 insertions(+), 782 deletions(-)
>
> --
> 2.20.1
>

--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 00/33] fbcon notifier begone v3!
@ 2019-06-06  7:38   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-06-06  7:38 UTC (permalink / raw)
  To: LKML
  Cc: DRI Development, Intel Graphics Development,
	Linux Fbdev development list, Daniel Thompson,
	Bartlomiej Zolnierkiewicz, Daniel Vetter

Hi Bart,

On Tue, May 28, 2019 at 11:02:31AM +0200, Daniel Vetter wrote:
> Hi all,
>
> I think we're slowly getting there. Previous cover letters with more
> context:
>
> https://lists.freedesktop.org/archives/dri-devel/2019-May/218362.html
>
> tldr; I have a multi-year plan to improve fbcon locking, because the
> current thing is a bit a mess.
>
> Cover letter of this version, where I detail a bit more the details
> fixed in this one here:
>
> https://lists.freedesktop.org/archives/dri-devel/2019-May/218984.html
>
> Note that the locking plan in this one is already outdated, I overlooked a
> few fun issues around any printk() going back to console_lock.
>
> I think remaining bits:
>
> - Ack from Daniel Thompson for the backlight bits, he wanted to check the
>   big picture.

I think Daniel is still on vacation until next week or so.

> - Hash out actual merge plan.

I'd like to stuff this into drm.git somehow, I guess topic branch works
too.

Long term I think we need to reconsider how we handle fbdev, at least the
core/fbcon pieces. Since a few years all the work in that area has been
motivated by drm, and pushed by drm contributors. Having that maintained
in a separate tree that doesn't regularly integrate imo doesn't make much
sense, and we ended up merging almost everything through some drm tree.
That one time we didn't (for some panel rotation stuff) it resulted in
some good suprises.

I think best solution is if we put the core and fbcon bits into drm-misc,
as group maintained infrastructure piece. All the other gfx infra pieces
are maintained in there already too. You'd obviously get commit rights.
I think that would include
- drivers/video/fbdev
- drivers/video/*c
- drivers/video/console

I don't really care about what happens with the actual fbdev drivers
(aside from the drm one in drm_fb_helper.c, but that's already maintained
as part of drm). I guess we could also put those into drm-misc, or as a
separate tree, depending what you want.

Thoughts?

Cheers, Daniel


>
> I'm also cc'ing the entire pile to a lot more people on request.
>
> Thanks, Daniel
>
> Daniel Vetter (33):
>   dummycon: Sprinkle locking checks
>   fbdev: locking check for fb_set_suspend
>   vt: might_sleep() annotation for do_blank_screen
>   vt: More locking checks
>   fbdev/sa1100fb: Remove dead code
>   fbdev/cyber2000: Remove struct display
>   fbdev/aty128fb: Remove dead code
>   fbcon: s/struct display/struct fbcon_display/
>   fbcon: Remove fbcon_has_exited
>   fbcon: call fbcon_fb_(un)registered directly
>   fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
>   fbdev/omap: sysfs files can't disappear before the device is gone
>   fbdev: sysfs files can't disappear before the device is gone
>   staging/olpc: lock_fb_info can't fail
>   fbdev/atyfb: lock_fb_info can't fail
>   fbdev: lock_fb_info cannot fail
>   fbcon: call fbcon_fb_bind directly
>   fbdev: make unregister/unlink functions not fail
>   fbdev: unify unlink_framebuffer paths
>   fbdev/sh_mob: Remove fb notifier callback
>   fbdev: directly call fbcon_suspended/resumed
>   fbcon: Call fbcon_mode_deleted/new_modelist directly
>   fbdev: Call fbcon_get_requirement directly
>   Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
>   fbmem: pull fbcon_fb_blanked out of fb_blank
>   fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
>   fb: Flatten control flow in fb_set_var
>   fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
>   vgaswitcheroo: call fbcon_remap_all directly
>   fbcon: Call con2fb_map functions directly
>   fbcon: Document what I learned about fbcon locking
>   staging/olpc_dcon: Add drm conversion to TODO
>   backlight: simplify lcd notifier
>
>  arch/arm/mach-pxa/am200epd.c                  |  13 +-
>  drivers/gpu/vga/vga_switcheroo.c              |  11 +-
>  drivers/media/pci/ivtv/ivtvfb.c               |   6 +-
>  drivers/staging/fbtft/fbtft-core.c            |   4 +-
>  drivers/staging/olpc_dcon/TODO                |   7 +
>  drivers/staging/olpc_dcon/olpc_dcon.c         |   6 +-
>  drivers/tty/vt/vt.c                           |  18 +
>  drivers/video/backlight/backlight.c           |   2 +-
>  drivers/video/backlight/lcd.c                 |  12 -
>  drivers/video/console/dummycon.c              |   6 +
>  drivers/video/fbdev/aty/aty128fb.c            |  64 ---
>  drivers/video/fbdev/aty/atyfb_base.c          |   3 +-
>  drivers/video/fbdev/core/fbcmap.c             |   6 +-
>  drivers/video/fbdev/core/fbcon.c              | 313 ++++++--------
>  drivers/video/fbdev/core/fbcon.h              |   6 +-
>  drivers/video/fbdev/core/fbmem.c              | 399 +++++++-----------
>  drivers/video/fbdev/core/fbsysfs.c            |  20 +-
>  drivers/video/fbdev/cyber2000fb.c             |   1 -
>  drivers/video/fbdev/neofb.c                   |   9 +-
>  .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   |  21 +-
>  drivers/video/fbdev/sa1100fb.c                |  25 --
>  drivers/video/fbdev/savage/savagefb_driver.c  |   9 +-
>  drivers/video/fbdev/sh_mobile_lcdcfb.c        | 132 +-----
>  drivers/video/fbdev/sh_mobile_lcdcfb.h        |   5 -
>  include/linux/console_struct.h                |   5 +-
>  include/linux/fb.h                            |  45 +-
>  include/linux/fbcon.h                         |  30 ++
>  27 files changed, 396 insertions(+), 782 deletions(-)
>
> --
> 2.20.1
>

--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 00/33] fbcon notifier begone v3!
  2019-06-06  7:38   ` Daniel Vetter
@ 2019-06-07 10:07     ` Bartlomiej Zolnierkiewicz
  -1 siblings, 0 replies; 117+ messages in thread
From: Bartlomiej Zolnierkiewicz @ 2019-06-07 10:07 UTC (permalink / raw)
  To: Daniel Vetter
  Cc: LKML, DRI Development, Intel Graphics Development,
	Linux Fbdev development list, Daniel Thompson, Daniel Vetter


On 6/6/19 9:38 AM, Daniel Vetter wrote:
> Hi Bart,

Hi Daniel,

> On Tue, May 28, 2019 at 11:02:31AM +0200, Daniel Vetter wrote:
>> Hi all,
>>
>> I think we're slowly getting there. Previous cover letters with more
>> context:
>>
>> https://lists.freedesktop.org/archives/dri-devel/2019-May/218362.html
>>
>> tldr; I have a multi-year plan to improve fbcon locking, because the
>> current thing is a bit a mess.
>>
>> Cover letter of this version, where I detail a bit more the details
>> fixed in this one here:
>>
>> https://lists.freedesktop.org/archives/dri-devel/2019-May/218984.html
>>
>> Note that the locking plan in this one is already outdated, I overlooked a
>> few fun issues around any printk() going back to console_lock.
>>
>> I think remaining bits:
>>
>> - Ack from Daniel Thompson for the backlight bits, he wanted to check the
>>   big picture.
> 
> I think Daniel is still on vacation until next week or so.
> 
>> - Hash out actual merge plan.
> 
> I'd like to stuff this into drm.git somehow, I guess topic branch works
> too.

I would like to have topic branch for this patchset.

> Long term I think we need to reconsider how we handle fbdev, at least the
> core/fbcon pieces. Since a few years all the work in that area has been
> motivated by drm, and pushed by drm contributors. Having that maintained
> in a separate tree that doesn't regularly integrate imo doesn't make much
> sense, and we ended up merging almost everything through some drm tree.
> That one time we didn't (for some panel rotation stuff) it resulted in
> some good suprises.
> 
> I think best solution is if we put the core and fbcon bits into drm-misc,
> as group maintained infrastructure piece. All the other gfx infra pieces
> are maintained in there already too. You'd obviously get commit rights.
> I think that would include
> - drivers/video/fbdev
> - drivers/video/*c
> - drivers/video/console

Sounds fine to me.

> I don't really care about what happens with the actual fbdev drivers
> (aside from the drm one in drm_fb_helper.c, but that's already maintained
> as part of drm). I guess we could also put those into drm-misc, or as a
> separate tree, depending what you want.
> 
> Thoughts?

I would like to handle fbdev changes for v5.3 merge window using fbdev
tree but after that everything (including changes to fbdev drivers) can go
through drm-misc tree.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

> Cheers, Daniel
> 
> 
>>
>> I'm also cc'ing the entire pile to a lot more people on request.
>>
>> Thanks, Daniel
>>
>> Daniel Vetter (33):
>>   dummycon: Sprinkle locking checks
>>   fbdev: locking check for fb_set_suspend
>>   vt: might_sleep() annotation for do_blank_screen
>>   vt: More locking checks
>>   fbdev/sa1100fb: Remove dead code
>>   fbdev/cyber2000: Remove struct display
>>   fbdev/aty128fb: Remove dead code
>>   fbcon: s/struct display/struct fbcon_display/
>>   fbcon: Remove fbcon_has_exited
>>   fbcon: call fbcon_fb_(un)registered directly
>>   fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
>>   fbdev/omap: sysfs files can't disappear before the device is gone
>>   fbdev: sysfs files can't disappear before the device is gone
>>   staging/olpc: lock_fb_info can't fail
>>   fbdev/atyfb: lock_fb_info can't fail
>>   fbdev: lock_fb_info cannot fail
>>   fbcon: call fbcon_fb_bind directly
>>   fbdev: make unregister/unlink functions not fail
>>   fbdev: unify unlink_framebuffer paths
>>   fbdev/sh_mob: Remove fb notifier callback
>>   fbdev: directly call fbcon_suspended/resumed
>>   fbcon: Call fbcon_mode_deleted/new_modelist directly
>>   fbdev: Call fbcon_get_requirement directly
>>   Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
>>   fbmem: pull fbcon_fb_blanked out of fb_blank
>>   fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
>>   fb: Flatten control flow in fb_set_var
>>   fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
>>   vgaswitcheroo: call fbcon_remap_all directly
>>   fbcon: Call con2fb_map functions directly
>>   fbcon: Document what I learned about fbcon locking
>>   staging/olpc_dcon: Add drm conversion to TODO
>>   backlight: simplify lcd notifier
>>
>>  arch/arm/mach-pxa/am200epd.c                  |  13 +-
>>  drivers/gpu/vga/vga_switcheroo.c              |  11 +-
>>  drivers/media/pci/ivtv/ivtvfb.c               |   6 +-
>>  drivers/staging/fbtft/fbtft-core.c            |   4 +-
>>  drivers/staging/olpc_dcon/TODO                |   7 +
>>  drivers/staging/olpc_dcon/olpc_dcon.c         |   6 +-
>>  drivers/tty/vt/vt.c                           |  18 +
>>  drivers/video/backlight/backlight.c           |   2 +-
>>  drivers/video/backlight/lcd.c                 |  12 -
>>  drivers/video/console/dummycon.c              |   6 +
>>  drivers/video/fbdev/aty/aty128fb.c            |  64 ---
>>  drivers/video/fbdev/aty/atyfb_base.c          |   3 +-
>>  drivers/video/fbdev/core/fbcmap.c             |   6 +-
>>  drivers/video/fbdev/core/fbcon.c              | 313 ++++++--------
>>  drivers/video/fbdev/core/fbcon.h              |   6 +-
>>  drivers/video/fbdev/core/fbmem.c              | 399 +++++++-----------
>>  drivers/video/fbdev/core/fbsysfs.c            |  20 +-
>>  drivers/video/fbdev/cyber2000fb.c             |   1 -
>>  drivers/video/fbdev/neofb.c                   |   9 +-
>>  .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   |  21 +-
>>  drivers/video/fbdev/sa1100fb.c                |  25 --
>>  drivers/video/fbdev/savage/savagefb_driver.c  |   9 +-
>>  drivers/video/fbdev/sh_mobile_lcdcfb.c        | 132 +-----
>>  drivers/video/fbdev/sh_mobile_lcdcfb.h        |   5 -
>>  include/linux/console_struct.h                |   5 +-
>>  include/linux/fb.h                            |  45 +-
>>  include/linux/fbcon.h                         |  30 ++
>>  27 files changed, 396 insertions(+), 782 deletions(-)
>>
>> --
>> 2.20.1
>>
> 
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 00/33] fbcon notifier begone v3!
@ 2019-06-07 10:07     ` Bartlomiej Zolnierkiewicz
  0 siblings, 0 replies; 117+ messages in thread
From: Bartlomiej Zolnierkiewicz @ 2019-06-07 10:07 UTC (permalink / raw)
  To: Daniel Vetter
  Cc: LKML, DRI Development, Intel Graphics Development,
	Linux Fbdev development list, Daniel Thompson, Daniel Vetter


On 6/6/19 9:38 AM, Daniel Vetter wrote:
> Hi Bart,

Hi Daniel,

> On Tue, May 28, 2019 at 11:02:31AM +0200, Daniel Vetter wrote:
>> Hi all,
>>
>> I think we're slowly getting there. Previous cover letters with more
>> context:
>>
>> https://lists.freedesktop.org/archives/dri-devel/2019-May/218362.html
>>
>> tldr; I have a multi-year plan to improve fbcon locking, because the
>> current thing is a bit a mess.
>>
>> Cover letter of this version, where I detail a bit more the details
>> fixed in this one here:
>>
>> https://lists.freedesktop.org/archives/dri-devel/2019-May/218984.html
>>
>> Note that the locking plan in this one is already outdated, I overlooked a
>> few fun issues around any printk() going back to console_lock.
>>
>> I think remaining bits:
>>
>> - Ack from Daniel Thompson for the backlight bits, he wanted to check the
>>   big picture.
> 
> I think Daniel is still on vacation until next week or so.
> 
>> - Hash out actual merge plan.
> 
> I'd like to stuff this into drm.git somehow, I guess topic branch works
> too.

I would like to have topic branch for this patchset.

> Long term I think we need to reconsider how we handle fbdev, at least the
> core/fbcon pieces. Since a few years all the work in that area has been
> motivated by drm, and pushed by drm contributors. Having that maintained
> in a separate tree that doesn't regularly integrate imo doesn't make much
> sense, and we ended up merging almost everything through some drm tree.
> That one time we didn't (for some panel rotation stuff) it resulted in
> some good suprises.
> 
> I think best solution is if we put the core and fbcon bits into drm-misc,
> as group maintained infrastructure piece. All the other gfx infra pieces
> are maintained in there already too. You'd obviously get commit rights.
> I think that would include
> - drivers/video/fbdev
> - drivers/video/*c
> - drivers/video/console

Sounds fine to me.

> I don't really care about what happens with the actual fbdev drivers
> (aside from the drm one in drm_fb_helper.c, but that's already maintained
> as part of drm). I guess we could also put those into drm-misc, or as a
> separate tree, depending what you want.
> 
> Thoughts?

I would like to handle fbdev changes for v5.3 merge window using fbdev
tree but after that everything (including changes to fbdev drivers) can go
through drm-misc tree.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

> Cheers, Daniel
> 
> 
>>
>> I'm also cc'ing the entire pile to a lot more people on request.
>>
>> Thanks, Daniel
>>
>> Daniel Vetter (33):
>>   dummycon: Sprinkle locking checks
>>   fbdev: locking check for fb_set_suspend
>>   vt: might_sleep() annotation for do_blank_screen
>>   vt: More locking checks
>>   fbdev/sa1100fb: Remove dead code
>>   fbdev/cyber2000: Remove struct display
>>   fbdev/aty128fb: Remove dead code
>>   fbcon: s/struct display/struct fbcon_display/
>>   fbcon: Remove fbcon_has_exited
>>   fbcon: call fbcon_fb_(un)registered directly
>>   fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
>>   fbdev/omap: sysfs files can't disappear before the device is gone
>>   fbdev: sysfs files can't disappear before the device is gone
>>   staging/olpc: lock_fb_info can't fail
>>   fbdev/atyfb: lock_fb_info can't fail
>>   fbdev: lock_fb_info cannot fail
>>   fbcon: call fbcon_fb_bind directly
>>   fbdev: make unregister/unlink functions not fail
>>   fbdev: unify unlink_framebuffer paths
>>   fbdev/sh_mob: Remove fb notifier callback
>>   fbdev: directly call fbcon_suspended/resumed
>>   fbcon: Call fbcon_mode_deleted/new_modelist directly
>>   fbdev: Call fbcon_get_requirement directly
>>   Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
>>   fbmem: pull fbcon_fb_blanked out of fb_blank
>>   fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
>>   fb: Flatten control flow in fb_set_var
>>   fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
>>   vgaswitcheroo: call fbcon_remap_all directly
>>   fbcon: Call con2fb_map functions directly
>>   fbcon: Document what I learned about fbcon locking
>>   staging/olpc_dcon: Add drm conversion to TODO
>>   backlight: simplify lcd notifier
>>
>>  arch/arm/mach-pxa/am200epd.c                  |  13 +-
>>  drivers/gpu/vga/vga_switcheroo.c              |  11 +-
>>  drivers/media/pci/ivtv/ivtvfb.c               |   6 +-
>>  drivers/staging/fbtft/fbtft-core.c            |   4 +-
>>  drivers/staging/olpc_dcon/TODO                |   7 +
>>  drivers/staging/olpc_dcon/olpc_dcon.c         |   6 +-
>>  drivers/tty/vt/vt.c                           |  18 +
>>  drivers/video/backlight/backlight.c           |   2 +-
>>  drivers/video/backlight/lcd.c                 |  12 -
>>  drivers/video/console/dummycon.c              |   6 +
>>  drivers/video/fbdev/aty/aty128fb.c            |  64 ---
>>  drivers/video/fbdev/aty/atyfb_base.c          |   3 +-
>>  drivers/video/fbdev/core/fbcmap.c             |   6 +-
>>  drivers/video/fbdev/core/fbcon.c              | 313 ++++++--------
>>  drivers/video/fbdev/core/fbcon.h              |   6 +-
>>  drivers/video/fbdev/core/fbmem.c              | 399 +++++++-----------
>>  drivers/video/fbdev/core/fbsysfs.c            |  20 +-
>>  drivers/video/fbdev/cyber2000fb.c             |   1 -
>>  drivers/video/fbdev/neofb.c                   |   9 +-
>>  .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   |  21 +-
>>  drivers/video/fbdev/sa1100fb.c                |  25 --
>>  drivers/video/fbdev/savage/savagefb_driver.c  |   9 +-
>>  drivers/video/fbdev/sh_mobile_lcdcfb.c        | 132 +-----
>>  drivers/video/fbdev/sh_mobile_lcdcfb.h        |   5 -
>>  include/linux/console_struct.h                |   5 +-
>>  include/linux/fb.h                            |  45 +-
>>  include/linux/fbcon.h                         |  30 ++
>>  27 files changed, 396 insertions(+), 782 deletions(-)
>>
>> --
>> 2.20.1
>>
> 
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 00/33] fbcon notifier begone v3!
  2019-06-07 10:07     ` Bartlomiej Zolnierkiewicz
  (?)
@ 2019-06-07 14:43       ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-06-07 14:43 UTC (permalink / raw)
  To: Bartlomiej Zolnierkiewicz
  Cc: LKML, DRI Development, Intel Graphics Development,
	Linux Fbdev development list, Daniel Thompson

On Fri, Jun 7, 2019 at 12:07 PM Bartlomiej Zolnierkiewicz
<b.zolnierkie@samsung.com> wrote:
>
>
> On 6/6/19 9:38 AM, Daniel Vetter wrote:
> > Hi Bart,
>
> Hi Daniel,
>
> > On Tue, May 28, 2019 at 11:02:31AM +0200, Daniel Vetter wrote:
> >> Hi all,
> >>
> >> I think we're slowly getting there. Previous cover letters with more
> >> context:
> >>
> >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218362.html
> >>
> >> tldr; I have a multi-year plan to improve fbcon locking, because the
> >> current thing is a bit a mess.
> >>
> >> Cover letter of this version, where I detail a bit more the details
> >> fixed in this one here:
> >>
> >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218984.html
> >>
> >> Note that the locking plan in this one is already outdated, I overlooked a
> >> few fun issues around any printk() going back to console_lock.
> >>
> >> I think remaining bits:
> >>
> >> - Ack from Daniel Thompson for the backlight bits, he wanted to check the
> >>   big picture.
> >
> > I think Daniel is still on vacation until next week or so.
> >
> >> - Hash out actual merge plan.
> >
> > I'd like to stuff this into drm.git somehow, I guess topic branch works
> > too.
>
> I would like to have topic branch for this patchset.

Do you plan to prep that, or should I? Doesn't really matter to me,
and assuming Daniel Thompson doesn't have any last minute concerns
should still be enough time to get it all sorted and have a few weeks
of testing left before the merge window.

> > Long term I think we need to reconsider how we handle fbdev, at least the
> > core/fbcon pieces. Since a few years all the work in that area has been
> > motivated by drm, and pushed by drm contributors. Having that maintained
> > in a separate tree that doesn't regularly integrate imo doesn't make much
> > sense, and we ended up merging almost everything through some drm tree.
> > That one time we didn't (for some panel rotation stuff) it resulted in
> > some good suprises.
> >
> > I think best solution is if we put the core and fbcon bits into drm-misc,
> > as group maintained infrastructure piece. All the other gfx infra pieces
> > are maintained in there already too. You'd obviously get commit rights.
> > I think that would include
> > - drivers/video/fbdev
> > - drivers/video/*c
> > - drivers/video/console
>
> Sounds fine to me.
>
> > I don't really care about what happens with the actual fbdev drivers
> > (aside from the drm one in drm_fb_helper.c, but that's already maintained
> > as part of drm). I guess we could also put those into drm-misc, or as a
> > separate tree, depending what you want.
> >
> > Thoughts?
>
> I would like to handle fbdev changes for v5.3 merge window using fbdev
> tree but after that everything (including changes to fbdev drivers) can go
> through drm-misc tree.

Fully agreed, no need to rush anything here. For the drm-misc account
you need to request an SSH legacy account here by filing a issue:

https://gitlab.freedesktop.org/freedesktop/freedesktop/issues/new

Select the "New SSH account" template, it has instructions with
everything that's needed.

For the getting started howto, see
https://drm.pages.freedesktop.org/maintainer-tools/getting-started.html

If that all looks good and you're set up I think best to test-drive
the entire process with the MAINTAINERS patch to change the git repo
for 5.4.

Cheers, Daniel


> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
>
> > Cheers, Daniel
> >
> >
> >>
> >> I'm also cc'ing the entire pile to a lot more people on request.
> >>
> >> Thanks, Daniel
> >>
> >> Daniel Vetter (33):
> >>   dummycon: Sprinkle locking checks
> >>   fbdev: locking check for fb_set_suspend
> >>   vt: might_sleep() annotation for do_blank_screen
> >>   vt: More locking checks
> >>   fbdev/sa1100fb: Remove dead code
> >>   fbdev/cyber2000: Remove struct display
> >>   fbdev/aty128fb: Remove dead code
> >>   fbcon: s/struct display/struct fbcon_display/
> >>   fbcon: Remove fbcon_has_exited
> >>   fbcon: call fbcon_fb_(un)registered directly
> >>   fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
> >>   fbdev/omap: sysfs files can't disappear before the device is gone
> >>   fbdev: sysfs files can't disappear before the device is gone
> >>   staging/olpc: lock_fb_info can't fail
> >>   fbdev/atyfb: lock_fb_info can't fail
> >>   fbdev: lock_fb_info cannot fail
> >>   fbcon: call fbcon_fb_bind directly
> >>   fbdev: make unregister/unlink functions not fail
> >>   fbdev: unify unlink_framebuffer paths
> >>   fbdev/sh_mob: Remove fb notifier callback
> >>   fbdev: directly call fbcon_suspended/resumed
> >>   fbcon: Call fbcon_mode_deleted/new_modelist directly
> >>   fbdev: Call fbcon_get_requirement directly
> >>   Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
> >>   fbmem: pull fbcon_fb_blanked out of fb_blank
> >>   fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
> >>   fb: Flatten control flow in fb_set_var
> >>   fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
> >>   vgaswitcheroo: call fbcon_remap_all directly
> >>   fbcon: Call con2fb_map functions directly
> >>   fbcon: Document what I learned about fbcon locking
> >>   staging/olpc_dcon: Add drm conversion to TODO
> >>   backlight: simplify lcd notifier
> >>
> >>  arch/arm/mach-pxa/am200epd.c                  |  13 +-
> >>  drivers/gpu/vga/vga_switcheroo.c              |  11 +-
> >>  drivers/media/pci/ivtv/ivtvfb.c               |   6 +-
> >>  drivers/staging/fbtft/fbtft-core.c            |   4 +-
> >>  drivers/staging/olpc_dcon/TODO                |   7 +
> >>  drivers/staging/olpc_dcon/olpc_dcon.c         |   6 +-
> >>  drivers/tty/vt/vt.c                           |  18 +
> >>  drivers/video/backlight/backlight.c           |   2 +-
> >>  drivers/video/backlight/lcd.c                 |  12 -
> >>  drivers/video/console/dummycon.c              |   6 +
> >>  drivers/video/fbdev/aty/aty128fb.c            |  64 ---
> >>  drivers/video/fbdev/aty/atyfb_base.c          |   3 +-
> >>  drivers/video/fbdev/core/fbcmap.c             |   6 +-
> >>  drivers/video/fbdev/core/fbcon.c              | 313 ++++++--------
> >>  drivers/video/fbdev/core/fbcon.h              |   6 +-
> >>  drivers/video/fbdev/core/fbmem.c              | 399 +++++++-----------
> >>  drivers/video/fbdev/core/fbsysfs.c            |  20 +-
> >>  drivers/video/fbdev/cyber2000fb.c             |   1 -
> >>  drivers/video/fbdev/neofb.c                   |   9 +-
> >>  .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   |  21 +-
> >>  drivers/video/fbdev/sa1100fb.c                |  25 --
> >>  drivers/video/fbdev/savage/savagefb_driver.c  |   9 +-
> >>  drivers/video/fbdev/sh_mobile_lcdcfb.c        | 132 +-----
> >>  drivers/video/fbdev/sh_mobile_lcdcfb.h        |   5 -
> >>  include/linux/console_struct.h                |   5 +-
> >>  include/linux/fb.h                            |  45 +-
> >>  include/linux/fbcon.h                         |  30 ++
> >>  27 files changed, 396 insertions(+), 782 deletions(-)
> >>
> >> --
> >> 2.20.1
> >>
> >
> > --
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > http://blog.ffwll.ch



-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 00/33] fbcon notifier begone v3!
@ 2019-06-07 14:43       ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-06-07 14:43 UTC (permalink / raw)
  To: Bartlomiej Zolnierkiewicz
  Cc: Intel Graphics Development, Daniel Thompson, LKML,
	DRI Development, Linux Fbdev development list

On Fri, Jun 7, 2019 at 12:07 PM Bartlomiej Zolnierkiewicz
<b.zolnierkie@samsung.com> wrote:
>
>
> On 6/6/19 9:38 AM, Daniel Vetter wrote:
> > Hi Bart,
>
> Hi Daniel,
>
> > On Tue, May 28, 2019 at 11:02:31AM +0200, Daniel Vetter wrote:
> >> Hi all,
> >>
> >> I think we're slowly getting there. Previous cover letters with more
> >> context:
> >>
> >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218362.html
> >>
> >> tldr; I have a multi-year plan to improve fbcon locking, because the
> >> current thing is a bit a mess.
> >>
> >> Cover letter of this version, where I detail a bit more the details
> >> fixed in this one here:
> >>
> >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218984.html
> >>
> >> Note that the locking plan in this one is already outdated, I overlooked a
> >> few fun issues around any printk() going back to console_lock.
> >>
> >> I think remaining bits:
> >>
> >> - Ack from Daniel Thompson for the backlight bits, he wanted to check the
> >>   big picture.
> >
> > I think Daniel is still on vacation until next week or so.
> >
> >> - Hash out actual merge plan.
> >
> > I'd like to stuff this into drm.git somehow, I guess topic branch works
> > too.
>
> I would like to have topic branch for this patchset.

Do you plan to prep that, or should I? Doesn't really matter to me,
and assuming Daniel Thompson doesn't have any last minute concerns
should still be enough time to get it all sorted and have a few weeks
of testing left before the merge window.

> > Long term I think we need to reconsider how we handle fbdev, at least the
> > core/fbcon pieces. Since a few years all the work in that area has been
> > motivated by drm, and pushed by drm contributors. Having that maintained
> > in a separate tree that doesn't regularly integrate imo doesn't make much
> > sense, and we ended up merging almost everything through some drm tree.
> > That one time we didn't (for some panel rotation stuff) it resulted in
> > some good suprises.
> >
> > I think best solution is if we put the core and fbcon bits into drm-misc,
> > as group maintained infrastructure piece. All the other gfx infra pieces
> > are maintained in there already too. You'd obviously get commit rights.
> > I think that would include
> > - drivers/video/fbdev
> > - drivers/video/*c
> > - drivers/video/console
>
> Sounds fine to me.
>
> > I don't really care about what happens with the actual fbdev drivers
> > (aside from the drm one in drm_fb_helper.c, but that's already maintained
> > as part of drm). I guess we could also put those into drm-misc, or as a
> > separate tree, depending what you want.
> >
> > Thoughts?
>
> I would like to handle fbdev changes for v5.3 merge window using fbdev
> tree but after that everything (including changes to fbdev drivers) can go
> through drm-misc tree.

Fully agreed, no need to rush anything here. For the drm-misc account
you need to request an SSH legacy account here by filing a issue:

https://gitlab.freedesktop.org/freedesktop/freedesktop/issues/new

Select the "New SSH account" template, it has instructions with
everything that's needed.

For the getting started howto, see
https://drm.pages.freedesktop.org/maintainer-tools/getting-started.html

If that all looks good and you're set up I think best to test-drive
the entire process with the MAINTAINERS patch to change the git repo
for 5.4.

Cheers, Daniel


> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
>
> > Cheers, Daniel
> >
> >
> >>
> >> I'm also cc'ing the entire pile to a lot more people on request.
> >>
> >> Thanks, Daniel
> >>
> >> Daniel Vetter (33):
> >>   dummycon: Sprinkle locking checks
> >>   fbdev: locking check for fb_set_suspend
> >>   vt: might_sleep() annotation for do_blank_screen
> >>   vt: More locking checks
> >>   fbdev/sa1100fb: Remove dead code
> >>   fbdev/cyber2000: Remove struct display
> >>   fbdev/aty128fb: Remove dead code
> >>   fbcon: s/struct display/struct fbcon_display/
> >>   fbcon: Remove fbcon_has_exited
> >>   fbcon: call fbcon_fb_(un)registered directly
> >>   fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
> >>   fbdev/omap: sysfs files can't disappear before the device is gone
> >>   fbdev: sysfs files can't disappear before the device is gone
> >>   staging/olpc: lock_fb_info can't fail
> >>   fbdev/atyfb: lock_fb_info can't fail
> >>   fbdev: lock_fb_info cannot fail
> >>   fbcon: call fbcon_fb_bind directly
> >>   fbdev: make unregister/unlink functions not fail
> >>   fbdev: unify unlink_framebuffer paths
> >>   fbdev/sh_mob: Remove fb notifier callback
> >>   fbdev: directly call fbcon_suspended/resumed
> >>   fbcon: Call fbcon_mode_deleted/new_modelist directly
> >>   fbdev: Call fbcon_get_requirement directly
> >>   Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
> >>   fbmem: pull fbcon_fb_blanked out of fb_blank
> >>   fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
> >>   fb: Flatten control flow in fb_set_var
> >>   fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
> >>   vgaswitcheroo: call fbcon_remap_all directly
> >>   fbcon: Call con2fb_map functions directly
> >>   fbcon: Document what I learned about fbcon locking
> >>   staging/olpc_dcon: Add drm conversion to TODO
> >>   backlight: simplify lcd notifier
> >>
> >>  arch/arm/mach-pxa/am200epd.c                  |  13 +-
> >>  drivers/gpu/vga/vga_switcheroo.c              |  11 +-
> >>  drivers/media/pci/ivtv/ivtvfb.c               |   6 +-
> >>  drivers/staging/fbtft/fbtft-core.c            |   4 +-
> >>  drivers/staging/olpc_dcon/TODO                |   7 +
> >>  drivers/staging/olpc_dcon/olpc_dcon.c         |   6 +-
> >>  drivers/tty/vt/vt.c                           |  18 +
> >>  drivers/video/backlight/backlight.c           |   2 +-
> >>  drivers/video/backlight/lcd.c                 |  12 -
> >>  drivers/video/console/dummycon.c              |   6 +
> >>  drivers/video/fbdev/aty/aty128fb.c            |  64 ---
> >>  drivers/video/fbdev/aty/atyfb_base.c          |   3 +-
> >>  drivers/video/fbdev/core/fbcmap.c             |   6 +-
> >>  drivers/video/fbdev/core/fbcon.c              | 313 ++++++--------
> >>  drivers/video/fbdev/core/fbcon.h              |   6 +-
> >>  drivers/video/fbdev/core/fbmem.c              | 399 +++++++-----------
> >>  drivers/video/fbdev/core/fbsysfs.c            |  20 +-
> >>  drivers/video/fbdev/cyber2000fb.c             |   1 -
> >>  drivers/video/fbdev/neofb.c                   |   9 +-
> >>  .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   |  21 +-
> >>  drivers/video/fbdev/sa1100fb.c                |  25 --
> >>  drivers/video/fbdev/savage/savagefb_driver.c  |   9 +-
> >>  drivers/video/fbdev/sh_mobile_lcdcfb.c        | 132 +-----
> >>  drivers/video/fbdev/sh_mobile_lcdcfb.h        |   5 -
> >>  include/linux/console_struct.h                |   5 +-
> >>  include/linux/fb.h                            |  45 +-
> >>  include/linux/fbcon.h                         |  30 ++
> >>  27 files changed, 396 insertions(+), 782 deletions(-)
> >>
> >> --
> >> 2.20.1
> >>
> >
> > --
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > http://blog.ffwll.ch



-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 00/33] fbcon notifier begone v3!
@ 2019-06-07 14:43       ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-06-07 14:43 UTC (permalink / raw)
  To: Bartlomiej Zolnierkiewicz
  Cc: Intel Graphics Development, Daniel Thompson, LKML,
	DRI Development, Linux Fbdev development list

On Fri, Jun 7, 2019 at 12:07 PM Bartlomiej Zolnierkiewicz
<b.zolnierkie@samsung.com> wrote:
>
>
> On 6/6/19 9:38 AM, Daniel Vetter wrote:
> > Hi Bart,
>
> Hi Daniel,
>
> > On Tue, May 28, 2019 at 11:02:31AM +0200, Daniel Vetter wrote:
> >> Hi all,
> >>
> >> I think we're slowly getting there. Previous cover letters with more
> >> context:
> >>
> >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218362.html
> >>
> >> tldr; I have a multi-year plan to improve fbcon locking, because the
> >> current thing is a bit a mess.
> >>
> >> Cover letter of this version, where I detail a bit more the details
> >> fixed in this one here:
> >>
> >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218984.html
> >>
> >> Note that the locking plan in this one is already outdated, I overlooked a
> >> few fun issues around any printk() going back to console_lock.
> >>
> >> I think remaining bits:
> >>
> >> - Ack from Daniel Thompson for the backlight bits, he wanted to check the
> >>   big picture.
> >
> > I think Daniel is still on vacation until next week or so.
> >
> >> - Hash out actual merge plan.
> >
> > I'd like to stuff this into drm.git somehow, I guess topic branch works
> > too.
>
> I would like to have topic branch for this patchset.

Do you plan to prep that, or should I? Doesn't really matter to me,
and assuming Daniel Thompson doesn't have any last minute concerns
should still be enough time to get it all sorted and have a few weeks
of testing left before the merge window.

> > Long term I think we need to reconsider how we handle fbdev, at least the
> > core/fbcon pieces. Since a few years all the work in that area has been
> > motivated by drm, and pushed by drm contributors. Having that maintained
> > in a separate tree that doesn't regularly integrate imo doesn't make much
> > sense, and we ended up merging almost everything through some drm tree.
> > That one time we didn't (for some panel rotation stuff) it resulted in
> > some good suprises.
> >
> > I think best solution is if we put the core and fbcon bits into drm-misc,
> > as group maintained infrastructure piece. All the other gfx infra pieces
> > are maintained in there already too. You'd obviously get commit rights.
> > I think that would include
> > - drivers/video/fbdev
> > - drivers/video/*c
> > - drivers/video/console
>
> Sounds fine to me.
>
> > I don't really care about what happens with the actual fbdev drivers
> > (aside from the drm one in drm_fb_helper.c, but that's already maintained
> > as part of drm). I guess we could also put those into drm-misc, or as a
> > separate tree, depending what you want.
> >
> > Thoughts?
>
> I would like to handle fbdev changes for v5.3 merge window using fbdev
> tree but after that everything (including changes to fbdev drivers) can go
> through drm-misc tree.

Fully agreed, no need to rush anything here. For the drm-misc account
you need to request an SSH legacy account here by filing a issue:

https://gitlab.freedesktop.org/freedesktop/freedesktop/issues/new

Select the "New SSH account" template, it has instructions with
everything that's needed.

For the getting started howto, see
https://drm.pages.freedesktop.org/maintainer-tools/getting-started.html

If that all looks good and you're set up I think best to test-drive
the entire process with the MAINTAINERS patch to change the git repo
for 5.4.

Cheers, Daniel


> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
>
> > Cheers, Daniel
> >
> >
> >>
> >> I'm also cc'ing the entire pile to a lot more people on request.
> >>
> >> Thanks, Daniel
> >>
> >> Daniel Vetter (33):
> >>   dummycon: Sprinkle locking checks
> >>   fbdev: locking check for fb_set_suspend
> >>   vt: might_sleep() annotation for do_blank_screen
> >>   vt: More locking checks
> >>   fbdev/sa1100fb: Remove dead code
> >>   fbdev/cyber2000: Remove struct display
> >>   fbdev/aty128fb: Remove dead code
> >>   fbcon: s/struct display/struct fbcon_display/
> >>   fbcon: Remove fbcon_has_exited
> >>   fbcon: call fbcon_fb_(un)registered directly
> >>   fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
> >>   fbdev/omap: sysfs files can't disappear before the device is gone
> >>   fbdev: sysfs files can't disappear before the device is gone
> >>   staging/olpc: lock_fb_info can't fail
> >>   fbdev/atyfb: lock_fb_info can't fail
> >>   fbdev: lock_fb_info cannot fail
> >>   fbcon: call fbcon_fb_bind directly
> >>   fbdev: make unregister/unlink functions not fail
> >>   fbdev: unify unlink_framebuffer paths
> >>   fbdev/sh_mob: Remove fb notifier callback
> >>   fbdev: directly call fbcon_suspended/resumed
> >>   fbcon: Call fbcon_mode_deleted/new_modelist directly
> >>   fbdev: Call fbcon_get_requirement directly
> >>   Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
> >>   fbmem: pull fbcon_fb_blanked out of fb_blank
> >>   fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
> >>   fb: Flatten control flow in fb_set_var
> >>   fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
> >>   vgaswitcheroo: call fbcon_remap_all directly
> >>   fbcon: Call con2fb_map functions directly
> >>   fbcon: Document what I learned about fbcon locking
> >>   staging/olpc_dcon: Add drm conversion to TODO
> >>   backlight: simplify lcd notifier
> >>
> >>  arch/arm/mach-pxa/am200epd.c                  |  13 +-
> >>  drivers/gpu/vga/vga_switcheroo.c              |  11 +-
> >>  drivers/media/pci/ivtv/ivtvfb.c               |   6 +-
> >>  drivers/staging/fbtft/fbtft-core.c            |   4 +-
> >>  drivers/staging/olpc_dcon/TODO                |   7 +
> >>  drivers/staging/olpc_dcon/olpc_dcon.c         |   6 +-
> >>  drivers/tty/vt/vt.c                           |  18 +
> >>  drivers/video/backlight/backlight.c           |   2 +-
> >>  drivers/video/backlight/lcd.c                 |  12 -
> >>  drivers/video/console/dummycon.c              |   6 +
> >>  drivers/video/fbdev/aty/aty128fb.c            |  64 ---
> >>  drivers/video/fbdev/aty/atyfb_base.c          |   3 +-
> >>  drivers/video/fbdev/core/fbcmap.c             |   6 +-
> >>  drivers/video/fbdev/core/fbcon.c              | 313 ++++++--------
> >>  drivers/video/fbdev/core/fbcon.h              |   6 +-
> >>  drivers/video/fbdev/core/fbmem.c              | 399 +++++++-----------
> >>  drivers/video/fbdev/core/fbsysfs.c            |  20 +-
> >>  drivers/video/fbdev/cyber2000fb.c             |   1 -
> >>  drivers/video/fbdev/neofb.c                   |   9 +-
> >>  .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   |  21 +-
> >>  drivers/video/fbdev/sa1100fb.c                |  25 --
> >>  drivers/video/fbdev/savage/savagefb_driver.c  |   9 +-
> >>  drivers/video/fbdev/sh_mobile_lcdcfb.c        | 132 +-----
> >>  drivers/video/fbdev/sh_mobile_lcdcfb.h        |   5 -
> >>  include/linux/console_struct.h                |   5 +-
> >>  include/linux/fb.h                            |  45 +-
> >>  include/linux/fbcon.h                         |  30 ++
> >>  27 files changed, 396 insertions(+), 782 deletions(-)
> >>
> >> --
> >> 2.20.1
> >>
> >
> > --
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > http://blog.ffwll.ch



-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 24/33] Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
  2019-05-28  9:02   ` Daniel Vetter
  (?)
@ 2019-06-11 14:09     ` Daniel Thompson
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Thompson @ 2019-06-11 14:09 UTC (permalink / raw)
  To: Daniel Vetter
  Cc: LKML, DRI Development, Intel Graphics Development, linux-fbdev,
	Bartlomiej Zolnierkiewicz, Richard Purdie, Daniel Vetter,
	Sam Ravnborg, Maarten Lankhorst, Lee Jones, Jingoo Han,
	Hans de Goede, Yisheng Xie

On Tue, May 28, 2019 at 11:02:55AM +0200, Daniel Vetter wrote:
> This reverts commit 994efacdf9a087b52f71e620b58dfa526b0cf928.
> 
> The justification is that if hw blanking fails (i.e. fbops->fb_blank)
> fails, then we still want to shut down the backlight. Which is exactly
> _not_ what fb_blank() does and so rather inconsistent if we end up
> with different behaviour between fbcon and direct fbdev usage. Given
> that the entire notifier maze is getting in the way anyway I figured
> it's simplest to revert this not well justified commit.
> 
> v2: Add static inline to the dummy version.
> 
> Cc: Richard Purdie <rpurdie@rpsys.net>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Cc: Daniel Thompson <daniel.thompson@linaro.org>
> Cc: Jingoo Han <jingoohan1@gmail.com>
> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Hans de Goede <hdegoede@redhat.com>
> Cc: Yisheng Xie <ysxie@foxmail.com>
> Cc: linux-fbdev@vger.kernel.org

This was the main patch where I wanted the bigger picture ;-) and TBH
I'm still in two minds here. I don't personally view fbcon as
inconsistent, more that, as an in-kernel service it might have to do
more that something more complicated than freak out and let userspace
decide what to do next.

However... since I'm struggling to make up my mind, I can't think of
many products that would ship reliant exclusively on fbcon *and* this
patch is more about fbcon than backlight then I figure that, from a
backlight perspective:

Acked-by: Daniel Thompson <daniel.thompson@linaro.org>


Daniel.


> ---
>  drivers/video/backlight/backlight.c |  2 +-
>  drivers/video/fbdev/core/fbcon.c    | 14 +-------------
>  drivers/video/fbdev/core/fbmem.c    |  1 +
>  include/linux/fb.h                  |  4 +---
>  include/linux/fbcon.h               |  2 ++
>  5 files changed, 6 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
> index 1ef8b6fd62ac..5dc07106a59e 100644
> --- a/drivers/video/backlight/backlight.c
> +++ b/drivers/video/backlight/backlight.c
> @@ -47,7 +47,7 @@ static int fb_notifier_callback(struct notifier_block *self,
>  	int fb_blank = 0;
>  
>  	/* If we aren't interested in this event, skip it immediately ... */
> -	if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK)
> +	if (event != FB_EVENT_BLANK)
>  		return 0;
>  
>  	bd = container_of(self, struct backlight_device, fb_notif);
> diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
> index ef69bd4ad343..a4617067ff24 100644
> --- a/drivers/video/fbdev/core/fbcon.c
> +++ b/drivers/video/fbdev/core/fbcon.c
> @@ -2350,8 +2350,6 @@ static int fbcon_switch(struct vc_data *vc)
>  static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
>  				int blank)
>  {
> -	struct fb_event event;
> -
>  	if (blank) {
>  		unsigned short charmask = vc->vc_hi_font_mask ?
>  			0x1ff : 0xff;
> @@ -2362,13 +2360,6 @@ static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
>  		fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
>  		vc->vc_video_erase_char = oldc;
>  	}
> -
> -
> -	lock_fb_info(info);
> -	event.info = info;
> -	event.data = &blank;
> -	fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
> -	unlock_fb_info(info);
>  }
>  
>  static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
> @@ -3240,7 +3231,7 @@ int fbcon_fb_registered(struct fb_info *info)
>  	return ret;
>  }
>  
> -static void fbcon_fb_blanked(struct fb_info *info, int blank)
> +void fbcon_fb_blanked(struct fb_info *info, int blank)
>  {
>  	struct fbcon_ops *ops = info->fbcon_par;
>  	struct vc_data *vc;
> @@ -3344,9 +3335,6 @@ static int fbcon_event_notify(struct notifier_block *self,
>  		con2fb = event->data;
>  		con2fb->framebuffer = con2fb_map[con2fb->console - 1];
>  		break;
> -	case FB_EVENT_BLANK:
> -		fbcon_fb_blanked(info, *(int *)event->data);
> -		break;
>  	case FB_EVENT_REMAP_ALL_CONSOLE:
>  		idx = info->node;
>  		fbcon_remap_all(idx);
> diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
> index ddc0c16b8bbf..9366fbe99a58 100644
> --- a/drivers/video/fbdev/core/fbmem.c
> +++ b/drivers/video/fbdev/core/fbmem.c
> @@ -1068,6 +1068,7 @@ fb_blank(struct fb_info *info, int blank)
>  	event.data = &blank;
>  
>  	early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
> +	fbcon_fb_blanked(info, blank);
>  
>  	if (info->fbops->fb_blank)
>   		ret = info->fbops->fb_blank(blank, info);
> diff --git a/include/linux/fb.h b/include/linux/fb.h
> index 0d86aa31bf8d..1e66fac3124f 100644
> --- a/include/linux/fb.h
> +++ b/include/linux/fb.h
> @@ -137,12 +137,10 @@ struct fb_cursor_user {
>  #define FB_EVENT_GET_CONSOLE_MAP        0x07
>  /*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
>  #define FB_EVENT_SET_CONSOLE_MAP        0x08
> -/*      A hardware display blank change occurred */
> +/*      A display blank is requested       */
>  #define FB_EVENT_BLANK                  0x09
>  /*      Private modelist is to be replaced */
>  #define FB_EVENT_MODE_CHANGE_ALL	0x0B
> -/*	A software display blank change occurred */
> -#define FB_EVENT_CONBLANK               0x0C
>  /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
>  #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
>  /*      A hardware display blank early change occurred */
> diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
> index 305e4f2eddac..d67d7ec51ef9 100644
> --- a/include/linux/fbcon.h
> +++ b/include/linux/fbcon.h
> @@ -14,6 +14,7 @@ int fbcon_mode_deleted(struct fb_info *info,
>  void fbcon_new_modelist(struct fb_info *info);
>  void fbcon_get_requirement(struct fb_info *info,
>  			   struct fb_blit_caps *caps);
> +void fbcon_fb_blanked(struct fb_info *info, int blank);
>  #else
>  static inline void fb_console_init(void) {}
>  static inline void fb_console_exit(void) {}
> @@ -27,6 +28,7 @@ static inline int fbcon_mode_deleted(struct fb_info *info,
>  static inline void fbcon_new_modelist(struct fb_info *info) {}
>  static inline void fbcon_get_requirement(struct fb_info *info,
>  					 struct fb_blit_caps *caps) {}
> +static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
>  #endif
>  
>  #endif /* _LINUX_FBCON_H */
> -- 
> 2.20.1
> 

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 24/33] Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
@ 2019-06-11 14:09     ` Daniel Thompson
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Thompson @ 2019-06-11 14:09 UTC (permalink / raw)
  To: Daniel Vetter
  Cc: linux-fbdev, Bartlomiej Zolnierkiewicz, Lee Jones,
	Intel Graphics Development, LKML, DRI Development, Yisheng Xie,
	Richard Purdie, Jingoo Han, Daniel Vetter, Sam Ravnborg

On Tue, May 28, 2019 at 11:02:55AM +0200, Daniel Vetter wrote:
> This reverts commit 994efacdf9a087b52f71e620b58dfa526b0cf928.
> 
> The justification is that if hw blanking fails (i.e. fbops->fb_blank)
> fails, then we still want to shut down the backlight. Which is exactly
> _not_ what fb_blank() does and so rather inconsistent if we end up
> with different behaviour between fbcon and direct fbdev usage. Given
> that the entire notifier maze is getting in the way anyway I figured
> it's simplest to revert this not well justified commit.
> 
> v2: Add static inline to the dummy version.
> 
> Cc: Richard Purdie <rpurdie@rpsys.net>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Cc: Daniel Thompson <daniel.thompson@linaro.org>
> Cc: Jingoo Han <jingoohan1@gmail.com>
> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Hans de Goede <hdegoede@redhat.com>
> Cc: Yisheng Xie <ysxie@foxmail.com>
> Cc: linux-fbdev@vger.kernel.org

This was the main patch where I wanted the bigger picture ;-) and TBH
I'm still in two minds here. I don't personally view fbcon as
inconsistent, more that, as an in-kernel service it might have to do
more that something more complicated than freak out and let userspace
decide what to do next.

However... since I'm struggling to make up my mind, I can't think of
many products that would ship reliant exclusively on fbcon *and* this
patch is more about fbcon than backlight then I figure that, from a
backlight perspective:

Acked-by: Daniel Thompson <daniel.thompson@linaro.org>


Daniel.


> ---
>  drivers/video/backlight/backlight.c |  2 +-
>  drivers/video/fbdev/core/fbcon.c    | 14 +-------------
>  drivers/video/fbdev/core/fbmem.c    |  1 +
>  include/linux/fb.h                  |  4 +---
>  include/linux/fbcon.h               |  2 ++
>  5 files changed, 6 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
> index 1ef8b6fd62ac..5dc07106a59e 100644
> --- a/drivers/video/backlight/backlight.c
> +++ b/drivers/video/backlight/backlight.c
> @@ -47,7 +47,7 @@ static int fb_notifier_callback(struct notifier_block *self,
>  	int fb_blank = 0;
>  
>  	/* If we aren't interested in this event, skip it immediately ... */
> -	if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK)
> +	if (event != FB_EVENT_BLANK)
>  		return 0;
>  
>  	bd = container_of(self, struct backlight_device, fb_notif);
> diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
> index ef69bd4ad343..a4617067ff24 100644
> --- a/drivers/video/fbdev/core/fbcon.c
> +++ b/drivers/video/fbdev/core/fbcon.c
> @@ -2350,8 +2350,6 @@ static int fbcon_switch(struct vc_data *vc)
>  static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
>  				int blank)
>  {
> -	struct fb_event event;
> -
>  	if (blank) {
>  		unsigned short charmask = vc->vc_hi_font_mask ?
>  			0x1ff : 0xff;
> @@ -2362,13 +2360,6 @@ static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
>  		fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
>  		vc->vc_video_erase_char = oldc;
>  	}
> -
> -
> -	lock_fb_info(info);
> -	event.info = info;
> -	event.data = &blank;
> -	fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
> -	unlock_fb_info(info);
>  }
>  
>  static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
> @@ -3240,7 +3231,7 @@ int fbcon_fb_registered(struct fb_info *info)
>  	return ret;
>  }
>  
> -static void fbcon_fb_blanked(struct fb_info *info, int blank)
> +void fbcon_fb_blanked(struct fb_info *info, int blank)
>  {
>  	struct fbcon_ops *ops = info->fbcon_par;
>  	struct vc_data *vc;
> @@ -3344,9 +3335,6 @@ static int fbcon_event_notify(struct notifier_block *self,
>  		con2fb = event->data;
>  		con2fb->framebuffer = con2fb_map[con2fb->console - 1];
>  		break;
> -	case FB_EVENT_BLANK:
> -		fbcon_fb_blanked(info, *(int *)event->data);
> -		break;
>  	case FB_EVENT_REMAP_ALL_CONSOLE:
>  		idx = info->node;
>  		fbcon_remap_all(idx);
> diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
> index ddc0c16b8bbf..9366fbe99a58 100644
> --- a/drivers/video/fbdev/core/fbmem.c
> +++ b/drivers/video/fbdev/core/fbmem.c
> @@ -1068,6 +1068,7 @@ fb_blank(struct fb_info *info, int blank)
>  	event.data = &blank;
>  
>  	early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
> +	fbcon_fb_blanked(info, blank);
>  
>  	if (info->fbops->fb_blank)
>   		ret = info->fbops->fb_blank(blank, info);
> diff --git a/include/linux/fb.h b/include/linux/fb.h
> index 0d86aa31bf8d..1e66fac3124f 100644
> --- a/include/linux/fb.h
> +++ b/include/linux/fb.h
> @@ -137,12 +137,10 @@ struct fb_cursor_user {
>  #define FB_EVENT_GET_CONSOLE_MAP        0x07
>  /*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
>  #define FB_EVENT_SET_CONSOLE_MAP        0x08
> -/*      A hardware display blank change occurred */
> +/*      A display blank is requested       */
>  #define FB_EVENT_BLANK                  0x09
>  /*      Private modelist is to be replaced */
>  #define FB_EVENT_MODE_CHANGE_ALL	0x0B
> -/*	A software display blank change occurred */
> -#define FB_EVENT_CONBLANK               0x0C
>  /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
>  #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
>  /*      A hardware display blank early change occurred */
> diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
> index 305e4f2eddac..d67d7ec51ef9 100644
> --- a/include/linux/fbcon.h
> +++ b/include/linux/fbcon.h
> @@ -14,6 +14,7 @@ int fbcon_mode_deleted(struct fb_info *info,
>  void fbcon_new_modelist(struct fb_info *info);
>  void fbcon_get_requirement(struct fb_info *info,
>  			   struct fb_blit_caps *caps);
> +void fbcon_fb_blanked(struct fb_info *info, int blank);
>  #else
>  static inline void fb_console_init(void) {}
>  static inline void fb_console_exit(void) {}
> @@ -27,6 +28,7 @@ static inline int fbcon_mode_deleted(struct fb_info *info,
>  static inline void fbcon_new_modelist(struct fb_info *info) {}
>  static inline void fbcon_get_requirement(struct fb_info *info,
>  					 struct fb_blit_caps *caps) {}
> +static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
>  #endif
>  
>  #endif /* _LINUX_FBCON_H */
> -- 
> 2.20.1
> 

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 24/33] Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
@ 2019-06-11 14:09     ` Daniel Thompson
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Thompson @ 2019-06-11 14:09 UTC (permalink / raw)
  To: Daniel Vetter
  Cc: linux-fbdev, Bartlomiej Zolnierkiewicz, Lee Jones,
	Intel Graphics Development, LKML, DRI Development, Yisheng Xie,
	Richard Purdie, Jingoo Han, Daniel Vetter, Sam Ravnborg

On Tue, May 28, 2019 at 11:02:55AM +0200, Daniel Vetter wrote:
> This reverts commit 994efacdf9a087b52f71e620b58dfa526b0cf928.
> 
> The justification is that if hw blanking fails (i.e. fbops->fb_blank)
> fails, then we still want to shut down the backlight. Which is exactly
> _not_ what fb_blank() does and so rather inconsistent if we end up
> with different behaviour between fbcon and direct fbdev usage. Given
> that the entire notifier maze is getting in the way anyway I figured
> it's simplest to revert this not well justified commit.
> 
> v2: Add static inline to the dummy version.
> 
> Cc: Richard Purdie <rpurdie@rpsys.net>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Cc: Daniel Thompson <daniel.thompson@linaro.org>
> Cc: Jingoo Han <jingoohan1@gmail.com>
> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Hans de Goede <hdegoede@redhat.com>
> Cc: Yisheng Xie <ysxie@foxmail.com>
> Cc: linux-fbdev@vger.kernel.org

This was the main patch where I wanted the bigger picture ;-) and TBH
I'm still in two minds here. I don't personally view fbcon as
inconsistent, more that, as an in-kernel service it might have to do
more that something more complicated than freak out and let userspace
decide what to do next.

However... since I'm struggling to make up my mind, I can't think of
many products that would ship reliant exclusively on fbcon *and* this
patch is more about fbcon than backlight then I figure that, from a
backlight perspective:

Acked-by: Daniel Thompson <daniel.thompson@linaro.org>


Daniel.


> ---
>  drivers/video/backlight/backlight.c |  2 +-
>  drivers/video/fbdev/core/fbcon.c    | 14 +-------------
>  drivers/video/fbdev/core/fbmem.c    |  1 +
>  include/linux/fb.h                  |  4 +---
>  include/linux/fbcon.h               |  2 ++
>  5 files changed, 6 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
> index 1ef8b6fd62ac..5dc07106a59e 100644
> --- a/drivers/video/backlight/backlight.c
> +++ b/drivers/video/backlight/backlight.c
> @@ -47,7 +47,7 @@ static int fb_notifier_callback(struct notifier_block *self,
>  	int fb_blank = 0;
>  
>  	/* If we aren't interested in this event, skip it immediately ... */
> -	if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK)
> +	if (event != FB_EVENT_BLANK)
>  		return 0;
>  
>  	bd = container_of(self, struct backlight_device, fb_notif);
> diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
> index ef69bd4ad343..a4617067ff24 100644
> --- a/drivers/video/fbdev/core/fbcon.c
> +++ b/drivers/video/fbdev/core/fbcon.c
> @@ -2350,8 +2350,6 @@ static int fbcon_switch(struct vc_data *vc)
>  static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
>  				int blank)
>  {
> -	struct fb_event event;
> -
>  	if (blank) {
>  		unsigned short charmask = vc->vc_hi_font_mask ?
>  			0x1ff : 0xff;
> @@ -2362,13 +2360,6 @@ static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
>  		fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
>  		vc->vc_video_erase_char = oldc;
>  	}
> -
> -
> -	lock_fb_info(info);
> -	event.info = info;
> -	event.data = &blank;
> -	fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
> -	unlock_fb_info(info);
>  }
>  
>  static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
> @@ -3240,7 +3231,7 @@ int fbcon_fb_registered(struct fb_info *info)
>  	return ret;
>  }
>  
> -static void fbcon_fb_blanked(struct fb_info *info, int blank)
> +void fbcon_fb_blanked(struct fb_info *info, int blank)
>  {
>  	struct fbcon_ops *ops = info->fbcon_par;
>  	struct vc_data *vc;
> @@ -3344,9 +3335,6 @@ static int fbcon_event_notify(struct notifier_block *self,
>  		con2fb = event->data;
>  		con2fb->framebuffer = con2fb_map[con2fb->console - 1];
>  		break;
> -	case FB_EVENT_BLANK:
> -		fbcon_fb_blanked(info, *(int *)event->data);
> -		break;
>  	case FB_EVENT_REMAP_ALL_CONSOLE:
>  		idx = info->node;
>  		fbcon_remap_all(idx);
> diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
> index ddc0c16b8bbf..9366fbe99a58 100644
> --- a/drivers/video/fbdev/core/fbmem.c
> +++ b/drivers/video/fbdev/core/fbmem.c
> @@ -1068,6 +1068,7 @@ fb_blank(struct fb_info *info, int blank)
>  	event.data = &blank;
>  
>  	early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
> +	fbcon_fb_blanked(info, blank);
>  
>  	if (info->fbops->fb_blank)
>   		ret = info->fbops->fb_blank(blank, info);
> diff --git a/include/linux/fb.h b/include/linux/fb.h
> index 0d86aa31bf8d..1e66fac3124f 100644
> --- a/include/linux/fb.h
> +++ b/include/linux/fb.h
> @@ -137,12 +137,10 @@ struct fb_cursor_user {
>  #define FB_EVENT_GET_CONSOLE_MAP        0x07
>  /*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
>  #define FB_EVENT_SET_CONSOLE_MAP        0x08
> -/*      A hardware display blank change occurred */
> +/*      A display blank is requested       */
>  #define FB_EVENT_BLANK                  0x09
>  /*      Private modelist is to be replaced */
>  #define FB_EVENT_MODE_CHANGE_ALL	0x0B
> -/*	A software display blank change occurred */
> -#define FB_EVENT_CONBLANK               0x0C
>  /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
>  #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
>  /*      A hardware display blank early change occurred */
> diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
> index 305e4f2eddac..d67d7ec51ef9 100644
> --- a/include/linux/fbcon.h
> +++ b/include/linux/fbcon.h
> @@ -14,6 +14,7 @@ int fbcon_mode_deleted(struct fb_info *info,
>  void fbcon_new_modelist(struct fb_info *info);
>  void fbcon_get_requirement(struct fb_info *info,
>  			   struct fb_blit_caps *caps);
> +void fbcon_fb_blanked(struct fb_info *info, int blank);
>  #else
>  static inline void fb_console_init(void) {}
>  static inline void fb_console_exit(void) {}
> @@ -27,6 +28,7 @@ static inline int fbcon_mode_deleted(struct fb_info *info,
>  static inline void fbcon_new_modelist(struct fb_info *info) {}
>  static inline void fbcon_get_requirement(struct fb_info *info,
>  					 struct fb_blit_caps *caps) {}
> +static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
>  #endif
>  
>  #endif /* _LINUX_FBCON_H */
> -- 
> 2.20.1
> 
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 28/33] fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
  2019-05-28  9:02   ` Daniel Vetter
  (?)
@ 2019-06-11 14:11     ` Daniel Thompson
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Thompson @ 2019-06-11 14:11 UTC (permalink / raw)
  To: Daniel Vetter
  Cc: LKML, DRI Development, Intel Graphics Development, linux-fbdev,
	Bartlomiej Zolnierkiewicz, Sam Ravnborg, Daniel Vetter,
	Maarten Lankhorst, Lee Jones, Jingoo Han, Hans de Goede,
	Yisheng Xie, Michał Mirosław, Peter Rosin,
	Mikulas Patocka

On Tue, May 28, 2019 at 11:02:59AM +0200, Daniel Vetter wrote:
> Create a new wrapper function for this, feels like there's some
> refactoring room here between the two modes.
> 
> v2: backlight notifier is also interested in the mode change event,
> it calls lcd->set_mode, of which there are 3 implementations. Thanks
> to Maarten for spotting this. So we keep that. We can ditch the differentiation
> between mode change and all mode changes (because backlight notifier
> doesn't care), and we can drop the FBINFO_MISC_USEREVENT stuff too,
> because that's just to prevent recursion between fbmem.c and fbcon.c.
> 
> While at it flatten the control flow a bit.
> 
> v3: Need to add a static inline to the dummy function.
> 
> v4: Add missing #include <fbcon.h> to sh_mob (Sam).
> 
> Cc: Sam Ravnborg <sam@ravnborg.org>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Cc: Daniel Thompson <daniel.thompson@linaro.org>
> Cc: Jingoo Han <jingoohan1@gmail.com>
> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Hans de Goede <hdegoede@redhat.com>
> Cc: Yisheng Xie <ysxie@foxmail.com>
> Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
> Cc: Peter Rosin <peda@axentia.se>
> Cc: Mikulas Patocka <mpatocka@redhat.com>
> Cc: linux-fbdev@vger.kernel.org

Acked-by: Daniel Thompson <daniel.thompson@linaro.org>


> ---
>  drivers/video/backlight/lcd.c          |  1 -
>  drivers/video/fbdev/core/fbcon.c       | 15 +++++++++------
>  drivers/video/fbdev/core/fbmem.c       | 21 ++++++++++-----------
>  drivers/video/fbdev/sh_mobile_lcdcfb.c | 12 ++----------
>  include/linux/fb.h                     |  2 --
>  include/linux/fbcon.h                  |  2 ++
>  6 files changed, 23 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
> index 151b18776add..ecdda06989d0 100644
> --- a/drivers/video/backlight/lcd.c
> +++ b/drivers/video/backlight/lcd.c
> @@ -34,7 +34,6 @@ static int fb_notifier_callback(struct notifier_block *self,
>  	switch (event) {
>  	case FB_EVENT_BLANK:
>  	case FB_EVENT_MODE_CHANGE:
> -	case FB_EVENT_MODE_CHANGE_ALL:
>  	case FB_EARLY_EVENT_BLANK:
>  	case FB_R_EARLY_EVENT_BLANK:
>  		break;
> diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
> index b5ee89f16d6c..e98551f96138 100644
> --- a/drivers/video/fbdev/core/fbcon.c
> +++ b/drivers/video/fbdev/core/fbcon.c
> @@ -3009,6 +3009,15 @@ static void fbcon_set_all_vcs(struct fb_info *info)
>  		fbcon_modechanged(info);
>  }
>  
> +
> +void fbcon_update_vcs(struct fb_info *info, bool all)
> +{
> +	if (all)
> +		fbcon_set_all_vcs(info);
> +	else
> +		fbcon_modechanged(info);
> +}
> +
>  int fbcon_mode_deleted(struct fb_info *info,
>  		       struct fb_videomode *mode)
>  {
> @@ -3318,12 +3327,6 @@ static int fbcon_event_notify(struct notifier_block *self,
>  	int idx, ret = 0;
>  
>  	switch(action) {
> -	case FB_EVENT_MODE_CHANGE:
> -		fbcon_modechanged(info);
> -		break;
> -	case FB_EVENT_MODE_CHANGE_ALL:
> -		fbcon_set_all_vcs(info);
> -		break;
>  	case FB_EVENT_SET_CONSOLE_MAP:
>  		/* called with console lock held */
>  		con2fb = event->data;
> diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
> index 96805fe85332..dd1a708df1a7 100644
> --- a/drivers/video/fbdev/core/fbmem.c
> +++ b/drivers/video/fbdev/core/fbmem.c
> @@ -957,6 +957,7 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
>  	u32 activate;
>  	struct fb_var_screeninfo old_var;
>  	struct fb_videomode mode;
> +	struct fb_event event;
>  
>  	if (var->activate & FB_ACTIVATE_INV_MODE) {
>  		struct fb_videomode mode1, mode2;
> @@ -1039,19 +1040,17 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
>  	    !list_empty(&info->modelist))
>  		ret = fb_add_videomode(&mode, &info->modelist);
>  
> -	if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
> -		struct fb_event event;
> -		int evnt = (activate & FB_ACTIVATE_ALL) ?
> -			FB_EVENT_MODE_CHANGE_ALL :
> -			FB_EVENT_MODE_CHANGE;
> +	if (ret)
> +		return ret;
>  
> -		info->flags &= ~FBINFO_MISC_USEREVENT;
> -		event.info = info;
> -		event.data = &mode;
> -		fb_notifier_call_chain(evnt, &event);
> -	}
> +	event.info = info;
> +	event.data = &mode;
> +	fb_notifier_call_chain(FB_EVENT_MODE_CHANGE, &event);
>  
> -	return ret;
> +	if (flags & FBINFO_MISC_USEREVENT)
> +		fbcon_update_vcs(info, activate & FB_ACTIVATE_ALL);
> +
> +	return 0;
>  }
>  EXPORT_SYMBOL(fb_set_var);
>  
> diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
> index 015a02a29d37..b8454424910d 100644
> --- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
> +++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
> @@ -15,6 +15,7 @@
>  #include <linux/ctype.h>
>  #include <linux/dma-mapping.h>
>  #include <linux/delay.h>
> +#include <linux/fbcon.h>
>  #include <linux/gpio.h>
>  #include <linux/init.h>
>  #include <linux/interrupt.h>
> @@ -1757,8 +1758,6 @@ static void sh_mobile_fb_reconfig(struct fb_info *info)
>  	struct sh_mobile_lcdc_chan *ch = info->par;
>  	struct fb_var_screeninfo var;
>  	struct fb_videomode mode;
> -	struct fb_event event;
> -	int evnt = FB_EVENT_MODE_CHANGE_ALL;
>  
>  	if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
>  		/* More framebuffer users are active */
> @@ -1780,14 +1779,7 @@ static void sh_mobile_fb_reconfig(struct fb_info *info)
>  		/* Couldn't reconfigure, hopefully, can continue as before */
>  		return;
>  
> -	/*
> -	 * fb_set_var() calls the notifier change internally, only if
> -	 * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
> -	 * user event, we have to call the chain ourselves.
> -	 */
> -	event.info = info;
> -	event.data = &ch->display.mode;
> -	fb_notifier_call_chain(evnt, &event);
> +	fbcon_update_vcs(info, true);
>  }
>  
>  /*
> diff --git a/include/linux/fb.h b/include/linux/fb.h
> index 1e66fac3124f..f9c212f9b661 100644
> --- a/include/linux/fb.h
> +++ b/include/linux/fb.h
> @@ -139,8 +139,6 @@ struct fb_cursor_user {
>  #define FB_EVENT_SET_CONSOLE_MAP        0x08
>  /*      A display blank is requested       */
>  #define FB_EVENT_BLANK                  0x09
> -/*      Private modelist is to be replaced */
> -#define FB_EVENT_MODE_CHANGE_ALL	0x0B
>  /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
>  #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
>  /*      A hardware display blank early change occurred */
> diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
> index d67d7ec51ef9..de31eeb22c97 100644
> --- a/include/linux/fbcon.h
> +++ b/include/linux/fbcon.h
> @@ -15,6 +15,7 @@ void fbcon_new_modelist(struct fb_info *info);
>  void fbcon_get_requirement(struct fb_info *info,
>  			   struct fb_blit_caps *caps);
>  void fbcon_fb_blanked(struct fb_info *info, int blank);
> +void fbcon_update_vcs(struct fb_info *info, bool all);
>  #else
>  static inline void fb_console_init(void) {}
>  static inline void fb_console_exit(void) {}
> @@ -29,6 +30,7 @@ static inline void fbcon_new_modelist(struct fb_info *info) {}
>  static inline void fbcon_get_requirement(struct fb_info *info,
>  					 struct fb_blit_caps *caps) {}
>  static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
> +static inline void fbcon_update_vcs(struct fb_info *info, bool all) {}
>  #endif
>  
>  #endif /* _LINUX_FBCON_H */
> -- 
> 2.20.1
> 

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 28/33] fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
@ 2019-06-11 14:11     ` Daniel Thompson
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Thompson @ 2019-06-11 14:11 UTC (permalink / raw)
  To: Daniel Vetter
  Cc: linux-fbdev, Bartlomiej Zolnierkiewicz, Lee Jones,
	Intel Graphics Development, LKML, DRI Development,
	Michał Mirosław, Yisheng Xie, Hans de Goede,
	Mikulas Patocka, Jingoo Han, Daniel Vetter, Sam Ravnborg,
	Peter Rosin

On Tue, May 28, 2019 at 11:02:59AM +0200, Daniel Vetter wrote:
> Create a new wrapper function for this, feels like there's some
> refactoring room here between the two modes.
> 
> v2: backlight notifier is also interested in the mode change event,
> it calls lcd->set_mode, of which there are 3 implementations. Thanks
> to Maarten for spotting this. So we keep that. We can ditch the differentiation
> between mode change and all mode changes (because backlight notifier
> doesn't care), and we can drop the FBINFO_MISC_USEREVENT stuff too,
> because that's just to prevent recursion between fbmem.c and fbcon.c.
> 
> While at it flatten the control flow a bit.
> 
> v3: Need to add a static inline to the dummy function.
> 
> v4: Add missing #include <fbcon.h> to sh_mob (Sam).
> 
> Cc: Sam Ravnborg <sam@ravnborg.org>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Cc: Daniel Thompson <daniel.thompson@linaro.org>
> Cc: Jingoo Han <jingoohan1@gmail.com>
> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Hans de Goede <hdegoede@redhat.com>
> Cc: Yisheng Xie <ysxie@foxmail.com>
> Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
> Cc: Peter Rosin <peda@axentia.se>
> Cc: Mikulas Patocka <mpatocka@redhat.com>
> Cc: linux-fbdev@vger.kernel.org

Acked-by: Daniel Thompson <daniel.thompson@linaro.org>


> ---
>  drivers/video/backlight/lcd.c          |  1 -
>  drivers/video/fbdev/core/fbcon.c       | 15 +++++++++------
>  drivers/video/fbdev/core/fbmem.c       | 21 ++++++++++-----------
>  drivers/video/fbdev/sh_mobile_lcdcfb.c | 12 ++----------
>  include/linux/fb.h                     |  2 --
>  include/linux/fbcon.h                  |  2 ++
>  6 files changed, 23 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
> index 151b18776add..ecdda06989d0 100644
> --- a/drivers/video/backlight/lcd.c
> +++ b/drivers/video/backlight/lcd.c
> @@ -34,7 +34,6 @@ static int fb_notifier_callback(struct notifier_block *self,
>  	switch (event) {
>  	case FB_EVENT_BLANK:
>  	case FB_EVENT_MODE_CHANGE:
> -	case FB_EVENT_MODE_CHANGE_ALL:
>  	case FB_EARLY_EVENT_BLANK:
>  	case FB_R_EARLY_EVENT_BLANK:
>  		break;
> diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
> index b5ee89f16d6c..e98551f96138 100644
> --- a/drivers/video/fbdev/core/fbcon.c
> +++ b/drivers/video/fbdev/core/fbcon.c
> @@ -3009,6 +3009,15 @@ static void fbcon_set_all_vcs(struct fb_info *info)
>  		fbcon_modechanged(info);
>  }
>  
> +
> +void fbcon_update_vcs(struct fb_info *info, bool all)
> +{
> +	if (all)
> +		fbcon_set_all_vcs(info);
> +	else
> +		fbcon_modechanged(info);
> +}
> +
>  int fbcon_mode_deleted(struct fb_info *info,
>  		       struct fb_videomode *mode)
>  {
> @@ -3318,12 +3327,6 @@ static int fbcon_event_notify(struct notifier_block *self,
>  	int idx, ret = 0;
>  
>  	switch(action) {
> -	case FB_EVENT_MODE_CHANGE:
> -		fbcon_modechanged(info);
> -		break;
> -	case FB_EVENT_MODE_CHANGE_ALL:
> -		fbcon_set_all_vcs(info);
> -		break;
>  	case FB_EVENT_SET_CONSOLE_MAP:
>  		/* called with console lock held */
>  		con2fb = event->data;
> diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
> index 96805fe85332..dd1a708df1a7 100644
> --- a/drivers/video/fbdev/core/fbmem.c
> +++ b/drivers/video/fbdev/core/fbmem.c
> @@ -957,6 +957,7 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
>  	u32 activate;
>  	struct fb_var_screeninfo old_var;
>  	struct fb_videomode mode;
> +	struct fb_event event;
>  
>  	if (var->activate & FB_ACTIVATE_INV_MODE) {
>  		struct fb_videomode mode1, mode2;
> @@ -1039,19 +1040,17 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
>  	    !list_empty(&info->modelist))
>  		ret = fb_add_videomode(&mode, &info->modelist);
>  
> -	if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
> -		struct fb_event event;
> -		int evnt = (activate & FB_ACTIVATE_ALL) ?
> -			FB_EVENT_MODE_CHANGE_ALL :
> -			FB_EVENT_MODE_CHANGE;
> +	if (ret)
> +		return ret;
>  
> -		info->flags &= ~FBINFO_MISC_USEREVENT;
> -		event.info = info;
> -		event.data = &mode;
> -		fb_notifier_call_chain(evnt, &event);
> -	}
> +	event.info = info;
> +	event.data = &mode;
> +	fb_notifier_call_chain(FB_EVENT_MODE_CHANGE, &event);
>  
> -	return ret;
> +	if (flags & FBINFO_MISC_USEREVENT)
> +		fbcon_update_vcs(info, activate & FB_ACTIVATE_ALL);
> +
> +	return 0;
>  }
>  EXPORT_SYMBOL(fb_set_var);
>  
> diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
> index 015a02a29d37..b8454424910d 100644
> --- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
> +++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
> @@ -15,6 +15,7 @@
>  #include <linux/ctype.h>
>  #include <linux/dma-mapping.h>
>  #include <linux/delay.h>
> +#include <linux/fbcon.h>
>  #include <linux/gpio.h>
>  #include <linux/init.h>
>  #include <linux/interrupt.h>
> @@ -1757,8 +1758,6 @@ static void sh_mobile_fb_reconfig(struct fb_info *info)
>  	struct sh_mobile_lcdc_chan *ch = info->par;
>  	struct fb_var_screeninfo var;
>  	struct fb_videomode mode;
> -	struct fb_event event;
> -	int evnt = FB_EVENT_MODE_CHANGE_ALL;
>  
>  	if (ch->use_count > 1 || (ch->use_count = 1 && !info->fbcon_par))
>  		/* More framebuffer users are active */
> @@ -1780,14 +1779,7 @@ static void sh_mobile_fb_reconfig(struct fb_info *info)
>  		/* Couldn't reconfigure, hopefully, can continue as before */
>  		return;
>  
> -	/*
> -	 * fb_set_var() calls the notifier change internally, only if
> -	 * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
> -	 * user event, we have to call the chain ourselves.
> -	 */
> -	event.info = info;
> -	event.data = &ch->display.mode;
> -	fb_notifier_call_chain(evnt, &event);
> +	fbcon_update_vcs(info, true);
>  }
>  
>  /*
> diff --git a/include/linux/fb.h b/include/linux/fb.h
> index 1e66fac3124f..f9c212f9b661 100644
> --- a/include/linux/fb.h
> +++ b/include/linux/fb.h
> @@ -139,8 +139,6 @@ struct fb_cursor_user {
>  #define FB_EVENT_SET_CONSOLE_MAP        0x08
>  /*      A display blank is requested       */
>  #define FB_EVENT_BLANK                  0x09
> -/*      Private modelist is to be replaced */
> -#define FB_EVENT_MODE_CHANGE_ALL	0x0B
>  /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
>  #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
>  /*      A hardware display blank early change occurred */
> diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
> index d67d7ec51ef9..de31eeb22c97 100644
> --- a/include/linux/fbcon.h
> +++ b/include/linux/fbcon.h
> @@ -15,6 +15,7 @@ void fbcon_new_modelist(struct fb_info *info);
>  void fbcon_get_requirement(struct fb_info *info,
>  			   struct fb_blit_caps *caps);
>  void fbcon_fb_blanked(struct fb_info *info, int blank);
> +void fbcon_update_vcs(struct fb_info *info, bool all);
>  #else
>  static inline void fb_console_init(void) {}
>  static inline void fb_console_exit(void) {}
> @@ -29,6 +30,7 @@ static inline void fbcon_new_modelist(struct fb_info *info) {}
>  static inline void fbcon_get_requirement(struct fb_info *info,
>  					 struct fb_blit_caps *caps) {}
>  static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
> +static inline void fbcon_update_vcs(struct fb_info *info, bool all) {}
>  #endif
>  
>  #endif /* _LINUX_FBCON_H */
> -- 
> 2.20.1
> 

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 28/33] fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
@ 2019-06-11 14:11     ` Daniel Thompson
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Thompson @ 2019-06-11 14:11 UTC (permalink / raw)
  To: Daniel Vetter
  Cc: linux-fbdev, Bartlomiej Zolnierkiewicz, Lee Jones,
	Intel Graphics Development, LKML, DRI Development,
	Michał Mirosław, Yisheng Xie, Hans de Goede,
	Mikulas Patocka, Jingoo Han, Daniel Vetter, Sam Ravnborg,
	Peter Rosin

On Tue, May 28, 2019 at 11:02:59AM +0200, Daniel Vetter wrote:
> Create a new wrapper function for this, feels like there's some
> refactoring room here between the two modes.
> 
> v2: backlight notifier is also interested in the mode change event,
> it calls lcd->set_mode, of which there are 3 implementations. Thanks
> to Maarten for spotting this. So we keep that. We can ditch the differentiation
> between mode change and all mode changes (because backlight notifier
> doesn't care), and we can drop the FBINFO_MISC_USEREVENT stuff too,
> because that's just to prevent recursion between fbmem.c and fbcon.c.
> 
> While at it flatten the control flow a bit.
> 
> v3: Need to add a static inline to the dummy function.
> 
> v4: Add missing #include <fbcon.h> to sh_mob (Sam).
> 
> Cc: Sam Ravnborg <sam@ravnborg.org>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Cc: Daniel Thompson <daniel.thompson@linaro.org>
> Cc: Jingoo Han <jingoohan1@gmail.com>
> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Hans de Goede <hdegoede@redhat.com>
> Cc: Yisheng Xie <ysxie@foxmail.com>
> Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
> Cc: Peter Rosin <peda@axentia.se>
> Cc: Mikulas Patocka <mpatocka@redhat.com>
> Cc: linux-fbdev@vger.kernel.org

Acked-by: Daniel Thompson <daniel.thompson@linaro.org>


> ---
>  drivers/video/backlight/lcd.c          |  1 -
>  drivers/video/fbdev/core/fbcon.c       | 15 +++++++++------
>  drivers/video/fbdev/core/fbmem.c       | 21 ++++++++++-----------
>  drivers/video/fbdev/sh_mobile_lcdcfb.c | 12 ++----------
>  include/linux/fb.h                     |  2 --
>  include/linux/fbcon.h                  |  2 ++
>  6 files changed, 23 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
> index 151b18776add..ecdda06989d0 100644
> --- a/drivers/video/backlight/lcd.c
> +++ b/drivers/video/backlight/lcd.c
> @@ -34,7 +34,6 @@ static int fb_notifier_callback(struct notifier_block *self,
>  	switch (event) {
>  	case FB_EVENT_BLANK:
>  	case FB_EVENT_MODE_CHANGE:
> -	case FB_EVENT_MODE_CHANGE_ALL:
>  	case FB_EARLY_EVENT_BLANK:
>  	case FB_R_EARLY_EVENT_BLANK:
>  		break;
> diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
> index b5ee89f16d6c..e98551f96138 100644
> --- a/drivers/video/fbdev/core/fbcon.c
> +++ b/drivers/video/fbdev/core/fbcon.c
> @@ -3009,6 +3009,15 @@ static void fbcon_set_all_vcs(struct fb_info *info)
>  		fbcon_modechanged(info);
>  }
>  
> +
> +void fbcon_update_vcs(struct fb_info *info, bool all)
> +{
> +	if (all)
> +		fbcon_set_all_vcs(info);
> +	else
> +		fbcon_modechanged(info);
> +}
> +
>  int fbcon_mode_deleted(struct fb_info *info,
>  		       struct fb_videomode *mode)
>  {
> @@ -3318,12 +3327,6 @@ static int fbcon_event_notify(struct notifier_block *self,
>  	int idx, ret = 0;
>  
>  	switch(action) {
> -	case FB_EVENT_MODE_CHANGE:
> -		fbcon_modechanged(info);
> -		break;
> -	case FB_EVENT_MODE_CHANGE_ALL:
> -		fbcon_set_all_vcs(info);
> -		break;
>  	case FB_EVENT_SET_CONSOLE_MAP:
>  		/* called with console lock held */
>  		con2fb = event->data;
> diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
> index 96805fe85332..dd1a708df1a7 100644
> --- a/drivers/video/fbdev/core/fbmem.c
> +++ b/drivers/video/fbdev/core/fbmem.c
> @@ -957,6 +957,7 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
>  	u32 activate;
>  	struct fb_var_screeninfo old_var;
>  	struct fb_videomode mode;
> +	struct fb_event event;
>  
>  	if (var->activate & FB_ACTIVATE_INV_MODE) {
>  		struct fb_videomode mode1, mode2;
> @@ -1039,19 +1040,17 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
>  	    !list_empty(&info->modelist))
>  		ret = fb_add_videomode(&mode, &info->modelist);
>  
> -	if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
> -		struct fb_event event;
> -		int evnt = (activate & FB_ACTIVATE_ALL) ?
> -			FB_EVENT_MODE_CHANGE_ALL :
> -			FB_EVENT_MODE_CHANGE;
> +	if (ret)
> +		return ret;
>  
> -		info->flags &= ~FBINFO_MISC_USEREVENT;
> -		event.info = info;
> -		event.data = &mode;
> -		fb_notifier_call_chain(evnt, &event);
> -	}
> +	event.info = info;
> +	event.data = &mode;
> +	fb_notifier_call_chain(FB_EVENT_MODE_CHANGE, &event);
>  
> -	return ret;
> +	if (flags & FBINFO_MISC_USEREVENT)
> +		fbcon_update_vcs(info, activate & FB_ACTIVATE_ALL);
> +
> +	return 0;
>  }
>  EXPORT_SYMBOL(fb_set_var);
>  
> diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
> index 015a02a29d37..b8454424910d 100644
> --- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
> +++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
> @@ -15,6 +15,7 @@
>  #include <linux/ctype.h>
>  #include <linux/dma-mapping.h>
>  #include <linux/delay.h>
> +#include <linux/fbcon.h>
>  #include <linux/gpio.h>
>  #include <linux/init.h>
>  #include <linux/interrupt.h>
> @@ -1757,8 +1758,6 @@ static void sh_mobile_fb_reconfig(struct fb_info *info)
>  	struct sh_mobile_lcdc_chan *ch = info->par;
>  	struct fb_var_screeninfo var;
>  	struct fb_videomode mode;
> -	struct fb_event event;
> -	int evnt = FB_EVENT_MODE_CHANGE_ALL;
>  
>  	if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
>  		/* More framebuffer users are active */
> @@ -1780,14 +1779,7 @@ static void sh_mobile_fb_reconfig(struct fb_info *info)
>  		/* Couldn't reconfigure, hopefully, can continue as before */
>  		return;
>  
> -	/*
> -	 * fb_set_var() calls the notifier change internally, only if
> -	 * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
> -	 * user event, we have to call the chain ourselves.
> -	 */
> -	event.info = info;
> -	event.data = &ch->display.mode;
> -	fb_notifier_call_chain(evnt, &event);
> +	fbcon_update_vcs(info, true);
>  }
>  
>  /*
> diff --git a/include/linux/fb.h b/include/linux/fb.h
> index 1e66fac3124f..f9c212f9b661 100644
> --- a/include/linux/fb.h
> +++ b/include/linux/fb.h
> @@ -139,8 +139,6 @@ struct fb_cursor_user {
>  #define FB_EVENT_SET_CONSOLE_MAP        0x08
>  /*      A display blank is requested       */
>  #define FB_EVENT_BLANK                  0x09
> -/*      Private modelist is to be replaced */
> -#define FB_EVENT_MODE_CHANGE_ALL	0x0B
>  /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
>  #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
>  /*      A hardware display blank early change occurred */
> diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
> index d67d7ec51ef9..de31eeb22c97 100644
> --- a/include/linux/fbcon.h
> +++ b/include/linux/fbcon.h
> @@ -15,6 +15,7 @@ void fbcon_new_modelist(struct fb_info *info);
>  void fbcon_get_requirement(struct fb_info *info,
>  			   struct fb_blit_caps *caps);
>  void fbcon_fb_blanked(struct fb_info *info, int blank);
> +void fbcon_update_vcs(struct fb_info *info, bool all);
>  #else
>  static inline void fb_console_init(void) {}
>  static inline void fb_console_exit(void) {}
> @@ -29,6 +30,7 @@ static inline void fbcon_new_modelist(struct fb_info *info) {}
>  static inline void fbcon_get_requirement(struct fb_info *info,
>  					 struct fb_blit_caps *caps) {}
>  static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
> +static inline void fbcon_update_vcs(struct fb_info *info, bool all) {}
>  #endif
>  
>  #endif /* _LINUX_FBCON_H */
> -- 
> 2.20.1
> 
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 33/33] backlight: simplify lcd notifier
  2019-05-28  9:03   ` Daniel Vetter
  (?)
@ 2019-06-11 14:11     ` Daniel Thompson
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Thompson @ 2019-06-11 14:11 UTC (permalink / raw)
  To: Daniel Vetter
  Cc: LKML, DRI Development, Intel Graphics Development, linux-fbdev,
	Bartlomiej Zolnierkiewicz, Daniel Vetter, Sam Ravnborg,
	Maarten Lankhorst, Lee Jones, Jingoo Han

On Tue, May 28, 2019 at 11:03:04AM +0200, Daniel Vetter wrote:
> With all the work I've done on replacing fb notifier calls with direct
> calls into fbcon the backlight/lcd notifier is the only user left.
> 
> It will only receive events now that it cares about, hence we can
> remove this check.
> 
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Cc: Daniel Thompson <daniel.thompson@linaro.org>
> Cc: Jingoo Han <jingoohan1@gmail.com>

Acked-by: Daniel Thompson <daniel.thompson@linaro.org>


> ---
>  drivers/video/backlight/lcd.c | 11 -----------
>  1 file changed, 11 deletions(-)
> 
> diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
> index ecdda06989d0..d6b653aa4ee9 100644
> --- a/drivers/video/backlight/lcd.c
> +++ b/drivers/video/backlight/lcd.c
> @@ -30,17 +30,6 @@ static int fb_notifier_callback(struct notifier_block *self,
>  	struct lcd_device *ld;
>  	struct fb_event *evdata = data;
>  
> -	/* If we aren't interested in this event, skip it immediately ... */
> -	switch (event) {
> -	case FB_EVENT_BLANK:
> -	case FB_EVENT_MODE_CHANGE:
> -	case FB_EARLY_EVENT_BLANK:
> -	case FB_R_EARLY_EVENT_BLANK:
> -		break;
> -	default:
> -		return 0;
> -	}
> -
>  	ld = container_of(self, struct lcd_device, fb_notif);
>  	if (!ld->ops)
>  		return 0;
> -- 
> 2.20.1
> 

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 33/33] backlight: simplify lcd notifier
@ 2019-06-11 14:11     ` Daniel Thompson
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Thompson @ 2019-06-11 14:11 UTC (permalink / raw)
  To: Daniel Vetter
  Cc: linux-fbdev, Bartlomiej Zolnierkiewicz, Lee Jones,
	Intel Graphics Development, LKML, DRI Development, Jingoo Han,
	Daniel Vetter, Sam Ravnborg

On Tue, May 28, 2019 at 11:03:04AM +0200, Daniel Vetter wrote:
> With all the work I've done on replacing fb notifier calls with direct
> calls into fbcon the backlight/lcd notifier is the only user left.
> 
> It will only receive events now that it cares about, hence we can
> remove this check.
> 
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Cc: Daniel Thompson <daniel.thompson@linaro.org>
> Cc: Jingoo Han <jingoohan1@gmail.com>

Acked-by: Daniel Thompson <daniel.thompson@linaro.org>


> ---
>  drivers/video/backlight/lcd.c | 11 -----------
>  1 file changed, 11 deletions(-)
> 
> diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
> index ecdda06989d0..d6b653aa4ee9 100644
> --- a/drivers/video/backlight/lcd.c
> +++ b/drivers/video/backlight/lcd.c
> @@ -30,17 +30,6 @@ static int fb_notifier_callback(struct notifier_block *self,
>  	struct lcd_device *ld;
>  	struct fb_event *evdata = data;
>  
> -	/* If we aren't interested in this event, skip it immediately ... */
> -	switch (event) {
> -	case FB_EVENT_BLANK:
> -	case FB_EVENT_MODE_CHANGE:
> -	case FB_EARLY_EVENT_BLANK:
> -	case FB_R_EARLY_EVENT_BLANK:
> -		break;
> -	default:
> -		return 0;
> -	}
> -
>  	ld = container_of(self, struct lcd_device, fb_notif);
>  	if (!ld->ops)
>  		return 0;
> -- 
> 2.20.1
> 

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 33/33] backlight: simplify lcd notifier
@ 2019-06-11 14:11     ` Daniel Thompson
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Thompson @ 2019-06-11 14:11 UTC (permalink / raw)
  To: Daniel Vetter
  Cc: linux-fbdev, Bartlomiej Zolnierkiewicz, Lee Jones,
	Intel Graphics Development, LKML, DRI Development, Jingoo Han,
	Daniel Vetter, Sam Ravnborg

On Tue, May 28, 2019 at 11:03:04AM +0200, Daniel Vetter wrote:
> With all the work I've done on replacing fb notifier calls with direct
> calls into fbcon the backlight/lcd notifier is the only user left.
> 
> It will only receive events now that it cares about, hence we can
> remove this check.
> 
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Cc: Daniel Thompson <daniel.thompson@linaro.org>
> Cc: Jingoo Han <jingoohan1@gmail.com>

Acked-by: Daniel Thompson <daniel.thompson@linaro.org>


> ---
>  drivers/video/backlight/lcd.c | 11 -----------
>  1 file changed, 11 deletions(-)
> 
> diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
> index ecdda06989d0..d6b653aa4ee9 100644
> --- a/drivers/video/backlight/lcd.c
> +++ b/drivers/video/backlight/lcd.c
> @@ -30,17 +30,6 @@ static int fb_notifier_callback(struct notifier_block *self,
>  	struct lcd_device *ld;
>  	struct fb_event *evdata = data;
>  
> -	/* If we aren't interested in this event, skip it immediately ... */
> -	switch (event) {
> -	case FB_EVENT_BLANK:
> -	case FB_EVENT_MODE_CHANGE:
> -	case FB_EARLY_EVENT_BLANK:
> -	case FB_R_EARLY_EVENT_BLANK:
> -		break;
> -	default:
> -		return 0;
> -	}
> -
>  	ld = container_of(self, struct lcd_device, fb_notif);
>  	if (!ld->ops)
>  		return 0;
> -- 
> 2.20.1
> 
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 00/33] fbcon notifier begone v3!
  2019-06-07 10:07     ` Bartlomiej Zolnierkiewicz
  (?)
@ 2019-06-11 14:16       ` Daniel Thompson
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Thompson @ 2019-06-11 14:16 UTC (permalink / raw)
  To: Bartlomiej Zolnierkiewicz
  Cc: Daniel Vetter, LKML, DRI Development, Intel Graphics Development,
	Linux Fbdev development list, Daniel Vetter, lee.jones

On Fri, Jun 07, 2019 at 12:07:55PM +0200, Bartlomiej Zolnierkiewicz wrote:
> 
> On 6/6/19 9:38 AM, Daniel Vetter wrote:
> > Hi Bart,
> 
> Hi Daniel,
> 
> > On Tue, May 28, 2019 at 11:02:31AM +0200, Daniel Vetter wrote:
> >> Hi all,
> >>
> >> I think we're slowly getting there. Previous cover letters with more
> >> context:
> >>
> >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218362.html
> >>
> >> tldr; I have a multi-year plan to improve fbcon locking, because the
> >> current thing is a bit a mess.
> >>
> >> Cover letter of this version, where I detail a bit more the details
> >> fixed in this one here:
> >>
> >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218984.html
> >>
> >> Note that the locking plan in this one is already outdated, I overlooked a
> >> few fun issues around any printk() going back to console_lock.
> >>
> >> I think remaining bits:
> >>
> >> - Ack from Daniel Thompson for the backlight bits, he wanted to check the
> >>   big picture.
> > 
> > I think Daniel is still on vacation until next week or so.

Thanks for spotting that. As it happens the e-mail asking for extra detail
was just about the last thing I sent before going on holiday (exactly to
try and avoid round trips this wee ;-) ).


> > 
> >> - Hash out actual merge plan.
> > 
> > I'd like to stuff this into drm.git somehow, I guess topic branch works
> > too.
> 
> I would like to have topic branch for this patchset.

From a backlight perspective its Lee Jones who hoovers up the patches
and worries about hiding merge conflicts from Linus.

I'll let him follow up if needed but I suspect he'd like an immutable
branch to work from also.


Daniel.


> 
> > Long term I think we need to reconsider how we handle fbdev, at least the
> > core/fbcon pieces. Since a few years all the work in that area has been
> > motivated by drm, and pushed by drm contributors. Having that maintained
> > in a separate tree that doesn't regularly integrate imo doesn't make much
> > sense, and we ended up merging almost everything through some drm tree.
> > That one time we didn't (for some panel rotation stuff) it resulted in
> > some good suprises.
> > 
> > I think best solution is if we put the core and fbcon bits into drm-misc,
> > as group maintained infrastructure piece. All the other gfx infra pieces
> > are maintained in there already too. You'd obviously get commit rights.
> > I think that would include
> > - drivers/video/fbdev
> > - drivers/video/*c
> > - drivers/video/console
> 
> Sounds fine to me.
> 
> > I don't really care about what happens with the actual fbdev drivers
> > (aside from the drm one in drm_fb_helper.c, but that's already maintained
> > as part of drm). I guess we could also put those into drm-misc, or as a
> > separate tree, depending what you want.
> > 
> > Thoughts?
> 
> I would like to handle fbdev changes for v5.3 merge window using fbdev
> tree but after that everything (including changes to fbdev drivers) can go
> through drm-misc tree.
> 
> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
> 
> > Cheers, Daniel
> > 
> > 
> >>
> >> I'm also cc'ing the entire pile to a lot more people on request.
> >>
> >> Thanks, Daniel
> >>
> >> Daniel Vetter (33):
> >>   dummycon: Sprinkle locking checks
> >>   fbdev: locking check for fb_set_suspend
> >>   vt: might_sleep() annotation for do_blank_screen
> >>   vt: More locking checks
> >>   fbdev/sa1100fb: Remove dead code
> >>   fbdev/cyber2000: Remove struct display
> >>   fbdev/aty128fb: Remove dead code
> >>   fbcon: s/struct display/struct fbcon_display/
> >>   fbcon: Remove fbcon_has_exited
> >>   fbcon: call fbcon_fb_(un)registered directly
> >>   fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
> >>   fbdev/omap: sysfs files can't disappear before the device is gone
> >>   fbdev: sysfs files can't disappear before the device is gone
> >>   staging/olpc: lock_fb_info can't fail
> >>   fbdev/atyfb: lock_fb_info can't fail
> >>   fbdev: lock_fb_info cannot fail
> >>   fbcon: call fbcon_fb_bind directly
> >>   fbdev: make unregister/unlink functions not fail
> >>   fbdev: unify unlink_framebuffer paths
> >>   fbdev/sh_mob: Remove fb notifier callback
> >>   fbdev: directly call fbcon_suspended/resumed
> >>   fbcon: Call fbcon_mode_deleted/new_modelist directly
> >>   fbdev: Call fbcon_get_requirement directly
> >>   Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
> >>   fbmem: pull fbcon_fb_blanked out of fb_blank
> >>   fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
> >>   fb: Flatten control flow in fb_set_var
> >>   fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
> >>   vgaswitcheroo: call fbcon_remap_all directly
> >>   fbcon: Call con2fb_map functions directly
> >>   fbcon: Document what I learned about fbcon locking
> >>   staging/olpc_dcon: Add drm conversion to TODO
> >>   backlight: simplify lcd notifier
> >>
> >>  arch/arm/mach-pxa/am200epd.c                  |  13 +-
> >>  drivers/gpu/vga/vga_switcheroo.c              |  11 +-
> >>  drivers/media/pci/ivtv/ivtvfb.c               |   6 +-
> >>  drivers/staging/fbtft/fbtft-core.c            |   4 +-
> >>  drivers/staging/olpc_dcon/TODO                |   7 +
> >>  drivers/staging/olpc_dcon/olpc_dcon.c         |   6 +-
> >>  drivers/tty/vt/vt.c                           |  18 +
> >>  drivers/video/backlight/backlight.c           |   2 +-
> >>  drivers/video/backlight/lcd.c                 |  12 -
> >>  drivers/video/console/dummycon.c              |   6 +
> >>  drivers/video/fbdev/aty/aty128fb.c            |  64 ---
> >>  drivers/video/fbdev/aty/atyfb_base.c          |   3 +-
> >>  drivers/video/fbdev/core/fbcmap.c             |   6 +-
> >>  drivers/video/fbdev/core/fbcon.c              | 313 ++++++--------
> >>  drivers/video/fbdev/core/fbcon.h              |   6 +-
> >>  drivers/video/fbdev/core/fbmem.c              | 399 +++++++-----------
> >>  drivers/video/fbdev/core/fbsysfs.c            |  20 +-
> >>  drivers/video/fbdev/cyber2000fb.c             |   1 -
> >>  drivers/video/fbdev/neofb.c                   |   9 +-
> >>  .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   |  21 +-
> >>  drivers/video/fbdev/sa1100fb.c                |  25 --
> >>  drivers/video/fbdev/savage/savagefb_driver.c  |   9 +-
> >>  drivers/video/fbdev/sh_mobile_lcdcfb.c        | 132 +-----
> >>  drivers/video/fbdev/sh_mobile_lcdcfb.h        |   5 -
> >>  include/linux/console_struct.h                |   5 +-
> >>  include/linux/fb.h                            |  45 +-
> >>  include/linux/fbcon.h                         |  30 ++
> >>  27 files changed, 396 insertions(+), 782 deletions(-)
> >>
> >> --
> >> 2.20.1
> >>
> > 
> > --
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > http://blog.ffwll.ch

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 00/33] fbcon notifier begone v3!
@ 2019-06-11 14:16       ` Daniel Thompson
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Thompson @ 2019-06-11 14:16 UTC (permalink / raw)
  To: Bartlomiej Zolnierkiewicz
  Cc: Linux Fbdev development list, Daniel Vetter,
	Intel Graphics Development, LKML, DRI Development, lee.jones

On Fri, Jun 07, 2019 at 12:07:55PM +0200, Bartlomiej Zolnierkiewicz wrote:
> 
> On 6/6/19 9:38 AM, Daniel Vetter wrote:
> > Hi Bart,
> 
> Hi Daniel,
> 
> > On Tue, May 28, 2019 at 11:02:31AM +0200, Daniel Vetter wrote:
> >> Hi all,
> >>
> >> I think we're slowly getting there. Previous cover letters with more
> >> context:
> >>
> >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218362.html
> >>
> >> tldr; I have a multi-year plan to improve fbcon locking, because the
> >> current thing is a bit a mess.
> >>
> >> Cover letter of this version, where I detail a bit more the details
> >> fixed in this one here:
> >>
> >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218984.html
> >>
> >> Note that the locking plan in this one is already outdated, I overlooked a
> >> few fun issues around any printk() going back to console_lock.
> >>
> >> I think remaining bits:
> >>
> >> - Ack from Daniel Thompson for the backlight bits, he wanted to check the
> >>   big picture.
> > 
> > I think Daniel is still on vacation until next week or so.

Thanks for spotting that. As it happens the e-mail asking for extra detail
was just about the last thing I sent before going on holiday (exactly to
try and avoid round trips this wee ;-) ).


> > 
> >> - Hash out actual merge plan.
> > 
> > I'd like to stuff this into drm.git somehow, I guess topic branch works
> > too.
> 
> I would like to have topic branch for this patchset.

From a backlight perspective its Lee Jones who hoovers up the patches
and worries about hiding merge conflicts from Linus.

I'll let him follow up if needed but I suspect he'd like an immutable
branch to work from also.


Daniel.


> 
> > Long term I think we need to reconsider how we handle fbdev, at least the
> > core/fbcon pieces. Since a few years all the work in that area has been
> > motivated by drm, and pushed by drm contributors. Having that maintained
> > in a separate tree that doesn't regularly integrate imo doesn't make much
> > sense, and we ended up merging almost everything through some drm tree.
> > That one time we didn't (for some panel rotation stuff) it resulted in
> > some good suprises.
> > 
> > I think best solution is if we put the core and fbcon bits into drm-misc,
> > as group maintained infrastructure piece. All the other gfx infra pieces
> > are maintained in there already too. You'd obviously get commit rights.
> > I think that would include
> > - drivers/video/fbdev
> > - drivers/video/*c
> > - drivers/video/console
> 
> Sounds fine to me.
> 
> > I don't really care about what happens with the actual fbdev drivers
> > (aside from the drm one in drm_fb_helper.c, but that's already maintained
> > as part of drm). I guess we could also put those into drm-misc, or as a
> > separate tree, depending what you want.
> > 
> > Thoughts?
> 
> I would like to handle fbdev changes for v5.3 merge window using fbdev
> tree but after that everything (including changes to fbdev drivers) can go
> through drm-misc tree.
> 
> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
> 
> > Cheers, Daniel
> > 
> > 
> >>
> >> I'm also cc'ing the entire pile to a lot more people on request.
> >>
> >> Thanks, Daniel
> >>
> >> Daniel Vetter (33):
> >>   dummycon: Sprinkle locking checks
> >>   fbdev: locking check for fb_set_suspend
> >>   vt: might_sleep() annotation for do_blank_screen
> >>   vt: More locking checks
> >>   fbdev/sa1100fb: Remove dead code
> >>   fbdev/cyber2000: Remove struct display
> >>   fbdev/aty128fb: Remove dead code
> >>   fbcon: s/struct display/struct fbcon_display/
> >>   fbcon: Remove fbcon_has_exited
> >>   fbcon: call fbcon_fb_(un)registered directly
> >>   fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
> >>   fbdev/omap: sysfs files can't disappear before the device is gone
> >>   fbdev: sysfs files can't disappear before the device is gone
> >>   staging/olpc: lock_fb_info can't fail
> >>   fbdev/atyfb: lock_fb_info can't fail
> >>   fbdev: lock_fb_info cannot fail
> >>   fbcon: call fbcon_fb_bind directly
> >>   fbdev: make unregister/unlink functions not fail
> >>   fbdev: unify unlink_framebuffer paths
> >>   fbdev/sh_mob: Remove fb notifier callback
> >>   fbdev: directly call fbcon_suspended/resumed
> >>   fbcon: Call fbcon_mode_deleted/new_modelist directly
> >>   fbdev: Call fbcon_get_requirement directly
> >>   Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
> >>   fbmem: pull fbcon_fb_blanked out of fb_blank
> >>   fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
> >>   fb: Flatten control flow in fb_set_var
> >>   fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
> >>   vgaswitcheroo: call fbcon_remap_all directly
> >>   fbcon: Call con2fb_map functions directly
> >>   fbcon: Document what I learned about fbcon locking
> >>   staging/olpc_dcon: Add drm conversion to TODO
> >>   backlight: simplify lcd notifier
> >>
> >>  arch/arm/mach-pxa/am200epd.c                  |  13 +-
> >>  drivers/gpu/vga/vga_switcheroo.c              |  11 +-
> >>  drivers/media/pci/ivtv/ivtvfb.c               |   6 +-
> >>  drivers/staging/fbtft/fbtft-core.c            |   4 +-
> >>  drivers/staging/olpc_dcon/TODO                |   7 +
> >>  drivers/staging/olpc_dcon/olpc_dcon.c         |   6 +-
> >>  drivers/tty/vt/vt.c                           |  18 +
> >>  drivers/video/backlight/backlight.c           |   2 +-
> >>  drivers/video/backlight/lcd.c                 |  12 -
> >>  drivers/video/console/dummycon.c              |   6 +
> >>  drivers/video/fbdev/aty/aty128fb.c            |  64 ---
> >>  drivers/video/fbdev/aty/atyfb_base.c          |   3 +-
> >>  drivers/video/fbdev/core/fbcmap.c             |   6 +-
> >>  drivers/video/fbdev/core/fbcon.c              | 313 ++++++--------
> >>  drivers/video/fbdev/core/fbcon.h              |   6 +-
> >>  drivers/video/fbdev/core/fbmem.c              | 399 +++++++-----------
> >>  drivers/video/fbdev/core/fbsysfs.c            |  20 +-
> >>  drivers/video/fbdev/cyber2000fb.c             |   1 -
> >>  drivers/video/fbdev/neofb.c                   |   9 +-
> >>  .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   |  21 +-
> >>  drivers/video/fbdev/sa1100fb.c                |  25 --
> >>  drivers/video/fbdev/savage/savagefb_driver.c  |   9 +-
> >>  drivers/video/fbdev/sh_mobile_lcdcfb.c        | 132 +-----
> >>  drivers/video/fbdev/sh_mobile_lcdcfb.h        |   5 -
> >>  include/linux/console_struct.h                |   5 +-
> >>  include/linux/fb.h                            |  45 +-
> >>  include/linux/fbcon.h                         |  30 ++
> >>  27 files changed, 396 insertions(+), 782 deletions(-)
> >>
> >> --
> >> 2.20.1
> >>
> > 
> > --
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > http://blog.ffwll.ch

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 00/33] fbcon notifier begone v3!
@ 2019-06-11 14:16       ` Daniel Thompson
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Thompson @ 2019-06-11 14:16 UTC (permalink / raw)
  To: Bartlomiej Zolnierkiewicz
  Cc: Linux Fbdev development list, Daniel Vetter,
	Intel Graphics Development, LKML, DRI Development, lee.jones

On Fri, Jun 07, 2019 at 12:07:55PM +0200, Bartlomiej Zolnierkiewicz wrote:
> 
> On 6/6/19 9:38 AM, Daniel Vetter wrote:
> > Hi Bart,
> 
> Hi Daniel,
> 
> > On Tue, May 28, 2019 at 11:02:31AM +0200, Daniel Vetter wrote:
> >> Hi all,
> >>
> >> I think we're slowly getting there. Previous cover letters with more
> >> context:
> >>
> >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218362.html
> >>
> >> tldr; I have a multi-year plan to improve fbcon locking, because the
> >> current thing is a bit a mess.
> >>
> >> Cover letter of this version, where I detail a bit more the details
> >> fixed in this one here:
> >>
> >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218984.html
> >>
> >> Note that the locking plan in this one is already outdated, I overlooked a
> >> few fun issues around any printk() going back to console_lock.
> >>
> >> I think remaining bits:
> >>
> >> - Ack from Daniel Thompson for the backlight bits, he wanted to check the
> >>   big picture.
> > 
> > I think Daniel is still on vacation until next week or so.

Thanks for spotting that. As it happens the e-mail asking for extra detail
was just about the last thing I sent before going on holiday (exactly to
try and avoid round trips this wee ;-) ).


> > 
> >> - Hash out actual merge plan.
> > 
> > I'd like to stuff this into drm.git somehow, I guess topic branch works
> > too.
> 
> I would like to have topic branch for this patchset.

From a backlight perspective its Lee Jones who hoovers up the patches
and worries about hiding merge conflicts from Linus.

I'll let him follow up if needed but I suspect he'd like an immutable
branch to work from also.


Daniel.


> 
> > Long term I think we need to reconsider how we handle fbdev, at least the
> > core/fbcon pieces. Since a few years all the work in that area has been
> > motivated by drm, and pushed by drm contributors. Having that maintained
> > in a separate tree that doesn't regularly integrate imo doesn't make much
> > sense, and we ended up merging almost everything through some drm tree.
> > That one time we didn't (for some panel rotation stuff) it resulted in
> > some good suprises.
> > 
> > I think best solution is if we put the core and fbcon bits into drm-misc,
> > as group maintained infrastructure piece. All the other gfx infra pieces
> > are maintained in there already too. You'd obviously get commit rights.
> > I think that would include
> > - drivers/video/fbdev
> > - drivers/video/*c
> > - drivers/video/console
> 
> Sounds fine to me.
> 
> > I don't really care about what happens with the actual fbdev drivers
> > (aside from the drm one in drm_fb_helper.c, but that's already maintained
> > as part of drm). I guess we could also put those into drm-misc, or as a
> > separate tree, depending what you want.
> > 
> > Thoughts?
> 
> I would like to handle fbdev changes for v5.3 merge window using fbdev
> tree but after that everything (including changes to fbdev drivers) can go
> through drm-misc tree.
> 
> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
> 
> > Cheers, Daniel
> > 
> > 
> >>
> >> I'm also cc'ing the entire pile to a lot more people on request.
> >>
> >> Thanks, Daniel
> >>
> >> Daniel Vetter (33):
> >>   dummycon: Sprinkle locking checks
> >>   fbdev: locking check for fb_set_suspend
> >>   vt: might_sleep() annotation for do_blank_screen
> >>   vt: More locking checks
> >>   fbdev/sa1100fb: Remove dead code
> >>   fbdev/cyber2000: Remove struct display
> >>   fbdev/aty128fb: Remove dead code
> >>   fbcon: s/struct display/struct fbcon_display/
> >>   fbcon: Remove fbcon_has_exited
> >>   fbcon: call fbcon_fb_(un)registered directly
> >>   fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
> >>   fbdev/omap: sysfs files can't disappear before the device is gone
> >>   fbdev: sysfs files can't disappear before the device is gone
> >>   staging/olpc: lock_fb_info can't fail
> >>   fbdev/atyfb: lock_fb_info can't fail
> >>   fbdev: lock_fb_info cannot fail
> >>   fbcon: call fbcon_fb_bind directly
> >>   fbdev: make unregister/unlink functions not fail
> >>   fbdev: unify unlink_framebuffer paths
> >>   fbdev/sh_mob: Remove fb notifier callback
> >>   fbdev: directly call fbcon_suspended/resumed
> >>   fbcon: Call fbcon_mode_deleted/new_modelist directly
> >>   fbdev: Call fbcon_get_requirement directly
> >>   Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
> >>   fbmem: pull fbcon_fb_blanked out of fb_blank
> >>   fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
> >>   fb: Flatten control flow in fb_set_var
> >>   fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
> >>   vgaswitcheroo: call fbcon_remap_all directly
> >>   fbcon: Call con2fb_map functions directly
> >>   fbcon: Document what I learned about fbcon locking
> >>   staging/olpc_dcon: Add drm conversion to TODO
> >>   backlight: simplify lcd notifier
> >>
> >>  arch/arm/mach-pxa/am200epd.c                  |  13 +-
> >>  drivers/gpu/vga/vga_switcheroo.c              |  11 +-
> >>  drivers/media/pci/ivtv/ivtvfb.c               |   6 +-
> >>  drivers/staging/fbtft/fbtft-core.c            |   4 +-
> >>  drivers/staging/olpc_dcon/TODO                |   7 +
> >>  drivers/staging/olpc_dcon/olpc_dcon.c         |   6 +-
> >>  drivers/tty/vt/vt.c                           |  18 +
> >>  drivers/video/backlight/backlight.c           |   2 +-
> >>  drivers/video/backlight/lcd.c                 |  12 -
> >>  drivers/video/console/dummycon.c              |   6 +
> >>  drivers/video/fbdev/aty/aty128fb.c            |  64 ---
> >>  drivers/video/fbdev/aty/atyfb_base.c          |   3 +-
> >>  drivers/video/fbdev/core/fbcmap.c             |   6 +-
> >>  drivers/video/fbdev/core/fbcon.c              | 313 ++++++--------
> >>  drivers/video/fbdev/core/fbcon.h              |   6 +-
> >>  drivers/video/fbdev/core/fbmem.c              | 399 +++++++-----------
> >>  drivers/video/fbdev/core/fbsysfs.c            |  20 +-
> >>  drivers/video/fbdev/cyber2000fb.c             |   1 -
> >>  drivers/video/fbdev/neofb.c                   |   9 +-
> >>  .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   |  21 +-
> >>  drivers/video/fbdev/sa1100fb.c                |  25 --
> >>  drivers/video/fbdev/savage/savagefb_driver.c  |   9 +-
> >>  drivers/video/fbdev/sh_mobile_lcdcfb.c        | 132 +-----
> >>  drivers/video/fbdev/sh_mobile_lcdcfb.h        |   5 -
> >>  include/linux/console_struct.h                |   5 +-
> >>  include/linux/fb.h                            |  45 +-
> >>  include/linux/fbcon.h                         |  30 ++
> >>  27 files changed, 396 insertions(+), 782 deletions(-)
> >>
> >> --
> >> 2.20.1
> >>
> > 
> > --
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > http://blog.ffwll.ch
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 24/33] Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
  2019-06-11 14:09     ` Daniel Thompson
@ 2019-06-11 15:39       ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-06-11 15:39 UTC (permalink / raw)
  To: Daniel Thompson
  Cc: Daniel Vetter, LKML, DRI Development, Intel Graphics Development,
	linux-fbdev, Bartlomiej Zolnierkiewicz, Richard Purdie,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Lee Jones,
	Jingoo Han, Hans de Goede, Yisheng Xie

On Tue, Jun 11, 2019 at 03:09:29PM +0100, Daniel Thompson wrote:
> On Tue, May 28, 2019 at 11:02:55AM +0200, Daniel Vetter wrote:
> > This reverts commit 994efacdf9a087b52f71e620b58dfa526b0cf928.
> > 
> > The justification is that if hw blanking fails (i.e. fbops->fb_blank)
> > fails, then we still want to shut down the backlight. Which is exactly
> > _not_ what fb_blank() does and so rather inconsistent if we end up
> > with different behaviour between fbcon and direct fbdev usage. Given
> > that the entire notifier maze is getting in the way anyway I figured
> > it's simplest to revert this not well justified commit.
> > 
> > v2: Add static inline to the dummy version.
> > 
> > Cc: Richard Purdie <rpurdie@rpsys.net>
> > Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> > Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> > Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> > Cc: Lee Jones <lee.jones@linaro.org>
> > Cc: Daniel Thompson <daniel.thompson@linaro.org>
> > Cc: Jingoo Han <jingoohan1@gmail.com>
> > Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> > Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> > Cc: Hans de Goede <hdegoede@redhat.com>
> > Cc: Yisheng Xie <ysxie@foxmail.com>
> > Cc: linux-fbdev@vger.kernel.org
> 
> This was the main patch where I wanted the bigger picture ;-) and TBH
> I'm still in two minds here. I don't personally view fbcon as
> inconsistent, more that, as an in-kernel service it might have to do
> more that something more complicated than freak out and let userspace
> decide what to do next.

I think the story is even worse, at least for drm-based drivers:

- We have the fbcon code here, which did something slightly different than
  fbdev modesets called through /dev/fb*.

- For most x86 drivers the expectations is that userspace handles the
  backlight over modesets (enabling/disabling as needed), and the rules
  for which backlight to pick extremely arcane: There's no link in sysfs
  or anywhere else from a drm connector to the corresponding backlight
  device.

- But some other drivers, mostly on the soc side, handle backlight
  enabling/disabling themselves, as part of the usual drm modeset
  sequence. And I suspect that at least some drm userspace more geared
  towards userspace doesn't bother handling the backlight on its own.

I don't have any plan yet how to get us out of this whole, but figured
this patch here should at least simplifiy things a bit.

Just fyi a bit more context here, I think there's more work to do :-/
-Daniel

> However... since I'm struggling to make up my mind, I can't think of
> many products that would ship reliant exclusively on fbcon *and* this
> patch is more about fbcon than backlight then I figure that, from a
> backlight perspective:
> 
> Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
> 
> 
> Daniel.
> 
> 
> > ---
> >  drivers/video/backlight/backlight.c |  2 +-
> >  drivers/video/fbdev/core/fbcon.c    | 14 +-------------
> >  drivers/video/fbdev/core/fbmem.c    |  1 +
> >  include/linux/fb.h                  |  4 +---
> >  include/linux/fbcon.h               |  2 ++
> >  5 files changed, 6 insertions(+), 17 deletions(-)
> > 
> > diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
> > index 1ef8b6fd62ac..5dc07106a59e 100644
> > --- a/drivers/video/backlight/backlight.c
> > +++ b/drivers/video/backlight/backlight.c
> > @@ -47,7 +47,7 @@ static int fb_notifier_callback(struct notifier_block *self,
> >  	int fb_blank = 0;
> >  
> >  	/* If we aren't interested in this event, skip it immediately ... */
> > -	if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK)
> > +	if (event != FB_EVENT_BLANK)
> >  		return 0;
> >  
> >  	bd = container_of(self, struct backlight_device, fb_notif);
> > diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
> > index ef69bd4ad343..a4617067ff24 100644
> > --- a/drivers/video/fbdev/core/fbcon.c
> > +++ b/drivers/video/fbdev/core/fbcon.c
> > @@ -2350,8 +2350,6 @@ static int fbcon_switch(struct vc_data *vc)
> >  static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
> >  				int blank)
> >  {
> > -	struct fb_event event;
> > -
> >  	if (blank) {
> >  		unsigned short charmask = vc->vc_hi_font_mask ?
> >  			0x1ff : 0xff;
> > @@ -2362,13 +2360,6 @@ static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
> >  		fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
> >  		vc->vc_video_erase_char = oldc;
> >  	}
> > -
> > -
> > -	lock_fb_info(info);
> > -	event.info = info;
> > -	event.data = &blank;
> > -	fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
> > -	unlock_fb_info(info);
> >  }
> >  
> >  static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
> > @@ -3240,7 +3231,7 @@ int fbcon_fb_registered(struct fb_info *info)
> >  	return ret;
> >  }
> >  
> > -static void fbcon_fb_blanked(struct fb_info *info, int blank)
> > +void fbcon_fb_blanked(struct fb_info *info, int blank)
> >  {
> >  	struct fbcon_ops *ops = info->fbcon_par;
> >  	struct vc_data *vc;
> > @@ -3344,9 +3335,6 @@ static int fbcon_event_notify(struct notifier_block *self,
> >  		con2fb = event->data;
> >  		con2fb->framebuffer = con2fb_map[con2fb->console - 1];
> >  		break;
> > -	case FB_EVENT_BLANK:
> > -		fbcon_fb_blanked(info, *(int *)event->data);
> > -		break;
> >  	case FB_EVENT_REMAP_ALL_CONSOLE:
> >  		idx = info->node;
> >  		fbcon_remap_all(idx);
> > diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
> > index ddc0c16b8bbf..9366fbe99a58 100644
> > --- a/drivers/video/fbdev/core/fbmem.c
> > +++ b/drivers/video/fbdev/core/fbmem.c
> > @@ -1068,6 +1068,7 @@ fb_blank(struct fb_info *info, int blank)
> >  	event.data = &blank;
> >  
> >  	early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
> > +	fbcon_fb_blanked(info, blank);
> >  
> >  	if (info->fbops->fb_blank)
> >   		ret = info->fbops->fb_blank(blank, info);
> > diff --git a/include/linux/fb.h b/include/linux/fb.h
> > index 0d86aa31bf8d..1e66fac3124f 100644
> > --- a/include/linux/fb.h
> > +++ b/include/linux/fb.h
> > @@ -137,12 +137,10 @@ struct fb_cursor_user {
> >  #define FB_EVENT_GET_CONSOLE_MAP        0x07
> >  /*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
> >  #define FB_EVENT_SET_CONSOLE_MAP        0x08
> > -/*      A hardware display blank change occurred */
> > +/*      A display blank is requested       */
> >  #define FB_EVENT_BLANK                  0x09
> >  /*      Private modelist is to be replaced */
> >  #define FB_EVENT_MODE_CHANGE_ALL	0x0B
> > -/*	A software display blank change occurred */
> > -#define FB_EVENT_CONBLANK               0x0C
> >  /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
> >  #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
> >  /*      A hardware display blank early change occurred */
> > diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
> > index 305e4f2eddac..d67d7ec51ef9 100644
> > --- a/include/linux/fbcon.h
> > +++ b/include/linux/fbcon.h
> > @@ -14,6 +14,7 @@ int fbcon_mode_deleted(struct fb_info *info,
> >  void fbcon_new_modelist(struct fb_info *info);
> >  void fbcon_get_requirement(struct fb_info *info,
> >  			   struct fb_blit_caps *caps);
> > +void fbcon_fb_blanked(struct fb_info *info, int blank);
> >  #else
> >  static inline void fb_console_init(void) {}
> >  static inline void fb_console_exit(void) {}
> > @@ -27,6 +28,7 @@ static inline int fbcon_mode_deleted(struct fb_info *info,
> >  static inline void fbcon_new_modelist(struct fb_info *info) {}
> >  static inline void fbcon_get_requirement(struct fb_info *info,
> >  					 struct fb_blit_caps *caps) {}
> > +static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
> >  #endif
> >  
> >  #endif /* _LINUX_FBCON_H */
> > -- 
> > 2.20.1
> > 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 24/33] Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
@ 2019-06-11 15:39       ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-06-11 15:39 UTC (permalink / raw)
  To: Daniel Thompson
  Cc: Daniel Vetter, LKML, DRI Development, Intel Graphics Development,
	linux-fbdev, Bartlomiej Zolnierkiewicz, Richard Purdie,
	Daniel Vetter, Sam Ravnborg, Maarten Lankhorst, Lee Jones,
	Jingoo Han, Hans de Goede, Yisheng Xie

On Tue, Jun 11, 2019 at 03:09:29PM +0100, Daniel Thompson wrote:
> On Tue, May 28, 2019 at 11:02:55AM +0200, Daniel Vetter wrote:
> > This reverts commit 994efacdf9a087b52f71e620b58dfa526b0cf928.
> > 
> > The justification is that if hw blanking fails (i.e. fbops->fb_blank)
> > fails, then we still want to shut down the backlight. Which is exactly
> > _not_ what fb_blank() does and so rather inconsistent if we end up
> > with different behaviour between fbcon and direct fbdev usage. Given
> > that the entire notifier maze is getting in the way anyway I figured
> > it's simplest to revert this not well justified commit.
> > 
> > v2: Add static inline to the dummy version.
> > 
> > Cc: Richard Purdie <rpurdie@rpsys.net>
> > Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> > Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> > Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> > Cc: Lee Jones <lee.jones@linaro.org>
> > Cc: Daniel Thompson <daniel.thompson@linaro.org>
> > Cc: Jingoo Han <jingoohan1@gmail.com>
> > Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> > Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> > Cc: Hans de Goede <hdegoede@redhat.com>
> > Cc: Yisheng Xie <ysxie@foxmail.com>
> > Cc: linux-fbdev@vger.kernel.org
> 
> This was the main patch where I wanted the bigger picture ;-) and TBH
> I'm still in two minds here. I don't personally view fbcon as
> inconsistent, more that, as an in-kernel service it might have to do
> more that something more complicated than freak out and let userspace
> decide what to do next.

I think the story is even worse, at least for drm-based drivers:

- We have the fbcon code here, which did something slightly different than
  fbdev modesets called through /dev/fb*.

- For most x86 drivers the expectations is that userspace handles the
  backlight over modesets (enabling/disabling as needed), and the rules
  for which backlight to pick extremely arcane: There's no link in sysfs
  or anywhere else from a drm connector to the corresponding backlight
  device.

- But some other drivers, mostly on the soc side, handle backlight
  enabling/disabling themselves, as part of the usual drm modeset
  sequence. And I suspect that at least some drm userspace more geared
  towards userspace doesn't bother handling the backlight on its own.

I don't have any plan yet how to get us out of this whole, but figured
this patch here should at least simplifiy things a bit.

Just fyi a bit more context here, I think there's more work to do :-/
-Daniel

> However... since I'm struggling to make up my mind, I can't think of
> many products that would ship reliant exclusively on fbcon *and* this
> patch is more about fbcon than backlight then I figure that, from a
> backlight perspective:
> 
> Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
> 
> 
> Daniel.
> 
> 
> > ---
> >  drivers/video/backlight/backlight.c |  2 +-
> >  drivers/video/fbdev/core/fbcon.c    | 14 +-------------
> >  drivers/video/fbdev/core/fbmem.c    |  1 +
> >  include/linux/fb.h                  |  4 +---
> >  include/linux/fbcon.h               |  2 ++
> >  5 files changed, 6 insertions(+), 17 deletions(-)
> > 
> > diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
> > index 1ef8b6fd62ac..5dc07106a59e 100644
> > --- a/drivers/video/backlight/backlight.c
> > +++ b/drivers/video/backlight/backlight.c
> > @@ -47,7 +47,7 @@ static int fb_notifier_callback(struct notifier_block *self,
> >  	int fb_blank = 0;
> >  
> >  	/* If we aren't interested in this event, skip it immediately ... */
> > -	if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK)
> > +	if (event != FB_EVENT_BLANK)
> >  		return 0;
> >  
> >  	bd = container_of(self, struct backlight_device, fb_notif);
> > diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
> > index ef69bd4ad343..a4617067ff24 100644
> > --- a/drivers/video/fbdev/core/fbcon.c
> > +++ b/drivers/video/fbdev/core/fbcon.c
> > @@ -2350,8 +2350,6 @@ static int fbcon_switch(struct vc_data *vc)
> >  static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
> >  				int blank)
> >  {
> > -	struct fb_event event;
> > -
> >  	if (blank) {
> >  		unsigned short charmask = vc->vc_hi_font_mask ?
> >  			0x1ff : 0xff;
> > @@ -2362,13 +2360,6 @@ static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
> >  		fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
> >  		vc->vc_video_erase_char = oldc;
> >  	}
> > -
> > -
> > -	lock_fb_info(info);
> > -	event.info = info;
> > -	event.data = &blank;
> > -	fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
> > -	unlock_fb_info(info);
> >  }
> >  
> >  static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
> > @@ -3240,7 +3231,7 @@ int fbcon_fb_registered(struct fb_info *info)
> >  	return ret;
> >  }
> >  
> > -static void fbcon_fb_blanked(struct fb_info *info, int blank)
> > +void fbcon_fb_blanked(struct fb_info *info, int blank)
> >  {
> >  	struct fbcon_ops *ops = info->fbcon_par;
> >  	struct vc_data *vc;
> > @@ -3344,9 +3335,6 @@ static int fbcon_event_notify(struct notifier_block *self,
> >  		con2fb = event->data;
> >  		con2fb->framebuffer = con2fb_map[con2fb->console - 1];
> >  		break;
> > -	case FB_EVENT_BLANK:
> > -		fbcon_fb_blanked(info, *(int *)event->data);
> > -		break;
> >  	case FB_EVENT_REMAP_ALL_CONSOLE:
> >  		idx = info->node;
> >  		fbcon_remap_all(idx);
> > diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
> > index ddc0c16b8bbf..9366fbe99a58 100644
> > --- a/drivers/video/fbdev/core/fbmem.c
> > +++ b/drivers/video/fbdev/core/fbmem.c
> > @@ -1068,6 +1068,7 @@ fb_blank(struct fb_info *info, int blank)
> >  	event.data = &blank;
> >  
> >  	early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
> > +	fbcon_fb_blanked(info, blank);
> >  
> >  	if (info->fbops->fb_blank)
> >   		ret = info->fbops->fb_blank(blank, info);
> > diff --git a/include/linux/fb.h b/include/linux/fb.h
> > index 0d86aa31bf8d..1e66fac3124f 100644
> > --- a/include/linux/fb.h
> > +++ b/include/linux/fb.h
> > @@ -137,12 +137,10 @@ struct fb_cursor_user {
> >  #define FB_EVENT_GET_CONSOLE_MAP        0x07
> >  /*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
> >  #define FB_EVENT_SET_CONSOLE_MAP        0x08
> > -/*      A hardware display blank change occurred */
> > +/*      A display blank is requested       */
> >  #define FB_EVENT_BLANK                  0x09
> >  /*      Private modelist is to be replaced */
> >  #define FB_EVENT_MODE_CHANGE_ALL	0x0B
> > -/*	A software display blank change occurred */
> > -#define FB_EVENT_CONBLANK               0x0C
> >  /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
> >  #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
> >  /*      A hardware display blank early change occurred */
> > diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
> > index 305e4f2eddac..d67d7ec51ef9 100644
> > --- a/include/linux/fbcon.h
> > +++ b/include/linux/fbcon.h
> > @@ -14,6 +14,7 @@ int fbcon_mode_deleted(struct fb_info *info,
> >  void fbcon_new_modelist(struct fb_info *info);
> >  void fbcon_get_requirement(struct fb_info *info,
> >  			   struct fb_blit_caps *caps);
> > +void fbcon_fb_blanked(struct fb_info *info, int blank);
> >  #else
> >  static inline void fb_console_init(void) {}
> >  static inline void fb_console_exit(void) {}
> > @@ -27,6 +28,7 @@ static inline int fbcon_mode_deleted(struct fb_info *info,
> >  static inline void fbcon_new_modelist(struct fb_info *info) {}
> >  static inline void fbcon_get_requirement(struct fb_info *info,
> >  					 struct fb_blit_caps *caps) {}
> > +static inline void fbcon_fb_blanked(struct fb_info *info, int blank) {}
> >  #endif
> >  
> >  #endif /* _LINUX_FBCON_H */
> > -- 
> > 2.20.1
> > 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 00/33] fbcon notifier begone v3!
  2019-06-11 14:16       ` Daniel Thompson
  (?)
@ 2019-06-11 15:50         ` Daniel Vetter
  -1 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-06-11 15:50 UTC (permalink / raw)
  To: Daniel Thompson
  Cc: Bartlomiej Zolnierkiewicz, Daniel Vetter, LKML, DRI Development,
	Intel Graphics Development, Linux Fbdev development list,
	Daniel Vetter, lee.jones

On Tue, Jun 11, 2019 at 03:16:35PM +0100, Daniel Thompson wrote:
> On Fri, Jun 07, 2019 at 12:07:55PM +0200, Bartlomiej Zolnierkiewicz wrote:
> > 
> > On 6/6/19 9:38 AM, Daniel Vetter wrote:
> > > Hi Bart,
> > 
> > Hi Daniel,
> > 
> > > On Tue, May 28, 2019 at 11:02:31AM +0200, Daniel Vetter wrote:
> > >> Hi all,
> > >>
> > >> I think we're slowly getting there. Previous cover letters with more
> > >> context:
> > >>
> > >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218362.html
> > >>
> > >> tldr; I have a multi-year plan to improve fbcon locking, because the
> > >> current thing is a bit a mess.
> > >>
> > >> Cover letter of this version, where I detail a bit more the details
> > >> fixed in this one here:
> > >>
> > >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218984.html
> > >>
> > >> Note that the locking plan in this one is already outdated, I overlooked a
> > >> few fun issues around any printk() going back to console_lock.
> > >>
> > >> I think remaining bits:
> > >>
> > >> - Ack from Daniel Thompson for the backlight bits, he wanted to check the
> > >>   big picture.
> > > 
> > > I think Daniel is still on vacation until next week or so.
> 
> Thanks for spotting that. As it happens the e-mail asking for extra detail
> was just about the last thing I sent before going on holiday (exactly to
> try and avoid round trips this wee ;-) ).

Vacations notices are sometimes indeed useful :-)

> > >> - Hash out actual merge plan.
> > > 
> > > I'd like to stuff this into drm.git somehow, I guess topic branch works
> > > too.
> > 
> > I would like to have topic branch for this patchset.
> 
> From a backlight perspective its Lee Jones who hoovers up the patches
> and worries about hiding merge conflicts from Linus.
> 
> I'll let him follow up if needed but I suspect he'd like an immutable
> branch to work from also.

Ok I'll build the topic branch, get it tested a bit and then send the pull
around to everyone. Thanks for taking a look at the backlight side.
-Daniel

> 
> 
> Daniel.
> 
> 
> > 
> > > Long term I think we need to reconsider how we handle fbdev, at least the
> > > core/fbcon pieces. Since a few years all the work in that area has been
> > > motivated by drm, and pushed by drm contributors. Having that maintained
> > > in a separate tree that doesn't regularly integrate imo doesn't make much
> > > sense, and we ended up merging almost everything through some drm tree.
> > > That one time we didn't (for some panel rotation stuff) it resulted in
> > > some good suprises.
> > > 
> > > I think best solution is if we put the core and fbcon bits into drm-misc,
> > > as group maintained infrastructure piece. All the other gfx infra pieces
> > > are maintained in there already too. You'd obviously get commit rights.
> > > I think that would include
> > > - drivers/video/fbdev
> > > - drivers/video/*c
> > > - drivers/video/console
> > 
> > Sounds fine to me.
> > 
> > > I don't really care about what happens with the actual fbdev drivers
> > > (aside from the drm one in drm_fb_helper.c, but that's already maintained
> > > as part of drm). I guess we could also put those into drm-misc, or as a
> > > separate tree, depending what you want.
> > > 
> > > Thoughts?
> > 
> > I would like to handle fbdev changes for v5.3 merge window using fbdev
> > tree but after that everything (including changes to fbdev drivers) can go
> > through drm-misc tree.
> > 
> > Best regards,
> > --
> > Bartlomiej Zolnierkiewicz
> > Samsung R&D Institute Poland
> > Samsung Electronics
> > 
> > > Cheers, Daniel
> > > 
> > > 
> > >>
> > >> I'm also cc'ing the entire pile to a lot more people on request.
> > >>
> > >> Thanks, Daniel
> > >>
> > >> Daniel Vetter (33):
> > >>   dummycon: Sprinkle locking checks
> > >>   fbdev: locking check for fb_set_suspend
> > >>   vt: might_sleep() annotation for do_blank_screen
> > >>   vt: More locking checks
> > >>   fbdev/sa1100fb: Remove dead code
> > >>   fbdev/cyber2000: Remove struct display
> > >>   fbdev/aty128fb: Remove dead code
> > >>   fbcon: s/struct display/struct fbcon_display/
> > >>   fbcon: Remove fbcon_has_exited
> > >>   fbcon: call fbcon_fb_(un)registered directly
> > >>   fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
> > >>   fbdev/omap: sysfs files can't disappear before the device is gone
> > >>   fbdev: sysfs files can't disappear before the device is gone
> > >>   staging/olpc: lock_fb_info can't fail
> > >>   fbdev/atyfb: lock_fb_info can't fail
> > >>   fbdev: lock_fb_info cannot fail
> > >>   fbcon: call fbcon_fb_bind directly
> > >>   fbdev: make unregister/unlink functions not fail
> > >>   fbdev: unify unlink_framebuffer paths
> > >>   fbdev/sh_mob: Remove fb notifier callback
> > >>   fbdev: directly call fbcon_suspended/resumed
> > >>   fbcon: Call fbcon_mode_deleted/new_modelist directly
> > >>   fbdev: Call fbcon_get_requirement directly
> > >>   Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
> > >>   fbmem: pull fbcon_fb_blanked out of fb_blank
> > >>   fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
> > >>   fb: Flatten control flow in fb_set_var
> > >>   fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
> > >>   vgaswitcheroo: call fbcon_remap_all directly
> > >>   fbcon: Call con2fb_map functions directly
> > >>   fbcon: Document what I learned about fbcon locking
> > >>   staging/olpc_dcon: Add drm conversion to TODO
> > >>   backlight: simplify lcd notifier
> > >>
> > >>  arch/arm/mach-pxa/am200epd.c                  |  13 +-
> > >>  drivers/gpu/vga/vga_switcheroo.c              |  11 +-
> > >>  drivers/media/pci/ivtv/ivtvfb.c               |   6 +-
> > >>  drivers/staging/fbtft/fbtft-core.c            |   4 +-
> > >>  drivers/staging/olpc_dcon/TODO                |   7 +
> > >>  drivers/staging/olpc_dcon/olpc_dcon.c         |   6 +-
> > >>  drivers/tty/vt/vt.c                           |  18 +
> > >>  drivers/video/backlight/backlight.c           |   2 +-
> > >>  drivers/video/backlight/lcd.c                 |  12 -
> > >>  drivers/video/console/dummycon.c              |   6 +
> > >>  drivers/video/fbdev/aty/aty128fb.c            |  64 ---
> > >>  drivers/video/fbdev/aty/atyfb_base.c          |   3 +-
> > >>  drivers/video/fbdev/core/fbcmap.c             |   6 +-
> > >>  drivers/video/fbdev/core/fbcon.c              | 313 ++++++--------
> > >>  drivers/video/fbdev/core/fbcon.h              |   6 +-
> > >>  drivers/video/fbdev/core/fbmem.c              | 399 +++++++-----------
> > >>  drivers/video/fbdev/core/fbsysfs.c            |  20 +-
> > >>  drivers/video/fbdev/cyber2000fb.c             |   1 -
> > >>  drivers/video/fbdev/neofb.c                   |   9 +-
> > >>  .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   |  21 +-
> > >>  drivers/video/fbdev/sa1100fb.c                |  25 --
> > >>  drivers/video/fbdev/savage/savagefb_driver.c  |   9 +-
> > >>  drivers/video/fbdev/sh_mobile_lcdcfb.c        | 132 +-----
> > >>  drivers/video/fbdev/sh_mobile_lcdcfb.h        |   5 -
> > >>  include/linux/console_struct.h                |   5 +-
> > >>  include/linux/fb.h                            |  45 +-
> > >>  include/linux/fbcon.h                         |  30 ++
> > >>  27 files changed, 396 insertions(+), 782 deletions(-)
> > >>
> > >> --
> > >> 2.20.1
> > >>
> > > 
> > > --
> > > Daniel Vetter
> > > Software Engineer, Intel Corporation
> > > http://blog.ffwll.ch

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 00/33] fbcon notifier begone v3!
@ 2019-06-11 15:50         ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-06-11 15:50 UTC (permalink / raw)
  To: Daniel Thompson
  Cc: Linux Fbdev development list, Bartlomiej Zolnierkiewicz,
	Daniel Vetter, Intel Graphics Development, LKML, DRI Development,
	lee.jones

On Tue, Jun 11, 2019 at 03:16:35PM +0100, Daniel Thompson wrote:
> On Fri, Jun 07, 2019 at 12:07:55PM +0200, Bartlomiej Zolnierkiewicz wrote:
> > 
> > On 6/6/19 9:38 AM, Daniel Vetter wrote:
> > > Hi Bart,
> > 
> > Hi Daniel,
> > 
> > > On Tue, May 28, 2019 at 11:02:31AM +0200, Daniel Vetter wrote:
> > >> Hi all,
> > >>
> > >> I think we're slowly getting there. Previous cover letters with more
> > >> context:
> > >>
> > >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218362.html
> > >>
> > >> tldr; I have a multi-year plan to improve fbcon locking, because the
> > >> current thing is a bit a mess.
> > >>
> > >> Cover letter of this version, where I detail a bit more the details
> > >> fixed in this one here:
> > >>
> > >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218984.html
> > >>
> > >> Note that the locking plan in this one is already outdated, I overlooked a
> > >> few fun issues around any printk() going back to console_lock.
> > >>
> > >> I think remaining bits:
> > >>
> > >> - Ack from Daniel Thompson for the backlight bits, he wanted to check the
> > >>   big picture.
> > > 
> > > I think Daniel is still on vacation until next week or so.
> 
> Thanks for spotting that. As it happens the e-mail asking for extra detail
> was just about the last thing I sent before going on holiday (exactly to
> try and avoid round trips this wee ;-) ).

Vacations notices are sometimes indeed useful :-)

> > >> - Hash out actual merge plan.
> > > 
> > > I'd like to stuff this into drm.git somehow, I guess topic branch works
> > > too.
> > 
> > I would like to have topic branch for this patchset.
> 
> From a backlight perspective its Lee Jones who hoovers up the patches
> and worries about hiding merge conflicts from Linus.
> 
> I'll let him follow up if needed but I suspect he'd like an immutable
> branch to work from also.

Ok I'll build the topic branch, get it tested a bit and then send the pull
around to everyone. Thanks for taking a look at the backlight side.
-Daniel

> 
> 
> Daniel.
> 
> 
> > 
> > > Long term I think we need to reconsider how we handle fbdev, at least the
> > > core/fbcon pieces. Since a few years all the work in that area has been
> > > motivated by drm, and pushed by drm contributors. Having that maintained
> > > in a separate tree that doesn't regularly integrate imo doesn't make much
> > > sense, and we ended up merging almost everything through some drm tree.
> > > That one time we didn't (for some panel rotation stuff) it resulted in
> > > some good suprises.
> > > 
> > > I think best solution is if we put the core and fbcon bits into drm-misc,
> > > as group maintained infrastructure piece. All the other gfx infra pieces
> > > are maintained in there already too. You'd obviously get commit rights.
> > > I think that would include
> > > - drivers/video/fbdev
> > > - drivers/video/*c
> > > - drivers/video/console
> > 
> > Sounds fine to me.
> > 
> > > I don't really care about what happens with the actual fbdev drivers
> > > (aside from the drm one in drm_fb_helper.c, but that's already maintained
> > > as part of drm). I guess we could also put those into drm-misc, or as a
> > > separate tree, depending what you want.
> > > 
> > > Thoughts?
> > 
> > I would like to handle fbdev changes for v5.3 merge window using fbdev
> > tree but after that everything (including changes to fbdev drivers) can go
> > through drm-misc tree.
> > 
> > Best regards,
> > --
> > Bartlomiej Zolnierkiewicz
> > Samsung R&D Institute Poland
> > Samsung Electronics
> > 
> > > Cheers, Daniel
> > > 
> > > 
> > >>
> > >> I'm also cc'ing the entire pile to a lot more people on request.
> > >>
> > >> Thanks, Daniel
> > >>
> > >> Daniel Vetter (33):
> > >>   dummycon: Sprinkle locking checks
> > >>   fbdev: locking check for fb_set_suspend
> > >>   vt: might_sleep() annotation for do_blank_screen
> > >>   vt: More locking checks
> > >>   fbdev/sa1100fb: Remove dead code
> > >>   fbdev/cyber2000: Remove struct display
> > >>   fbdev/aty128fb: Remove dead code
> > >>   fbcon: s/struct display/struct fbcon_display/
> > >>   fbcon: Remove fbcon_has_exited
> > >>   fbcon: call fbcon_fb_(un)registered directly
> > >>   fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
> > >>   fbdev/omap: sysfs files can't disappear before the device is gone
> > >>   fbdev: sysfs files can't disappear before the device is gone
> > >>   staging/olpc: lock_fb_info can't fail
> > >>   fbdev/atyfb: lock_fb_info can't fail
> > >>   fbdev: lock_fb_info cannot fail
> > >>   fbcon: call fbcon_fb_bind directly
> > >>   fbdev: make unregister/unlink functions not fail
> > >>   fbdev: unify unlink_framebuffer paths
> > >>   fbdev/sh_mob: Remove fb notifier callback
> > >>   fbdev: directly call fbcon_suspended/resumed
> > >>   fbcon: Call fbcon_mode_deleted/new_modelist directly
> > >>   fbdev: Call fbcon_get_requirement directly
> > >>   Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
> > >>   fbmem: pull fbcon_fb_blanked out of fb_blank
> > >>   fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
> > >>   fb: Flatten control flow in fb_set_var
> > >>   fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
> > >>   vgaswitcheroo: call fbcon_remap_all directly
> > >>   fbcon: Call con2fb_map functions directly
> > >>   fbcon: Document what I learned about fbcon locking
> > >>   staging/olpc_dcon: Add drm conversion to TODO
> > >>   backlight: simplify lcd notifier
> > >>
> > >>  arch/arm/mach-pxa/am200epd.c                  |  13 +-
> > >>  drivers/gpu/vga/vga_switcheroo.c              |  11 +-
> > >>  drivers/media/pci/ivtv/ivtvfb.c               |   6 +-
> > >>  drivers/staging/fbtft/fbtft-core.c            |   4 +-
> > >>  drivers/staging/olpc_dcon/TODO                |   7 +
> > >>  drivers/staging/olpc_dcon/olpc_dcon.c         |   6 +-
> > >>  drivers/tty/vt/vt.c                           |  18 +
> > >>  drivers/video/backlight/backlight.c           |   2 +-
> > >>  drivers/video/backlight/lcd.c                 |  12 -
> > >>  drivers/video/console/dummycon.c              |   6 +
> > >>  drivers/video/fbdev/aty/aty128fb.c            |  64 ---
> > >>  drivers/video/fbdev/aty/atyfb_base.c          |   3 +-
> > >>  drivers/video/fbdev/core/fbcmap.c             |   6 +-
> > >>  drivers/video/fbdev/core/fbcon.c              | 313 ++++++--------
> > >>  drivers/video/fbdev/core/fbcon.h              |   6 +-
> > >>  drivers/video/fbdev/core/fbmem.c              | 399 +++++++-----------
> > >>  drivers/video/fbdev/core/fbsysfs.c            |  20 +-
> > >>  drivers/video/fbdev/cyber2000fb.c             |   1 -
> > >>  drivers/video/fbdev/neofb.c                   |   9 +-
> > >>  .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   |  21 +-
> > >>  drivers/video/fbdev/sa1100fb.c                |  25 --
> > >>  drivers/video/fbdev/savage/savagefb_driver.c  |   9 +-
> > >>  drivers/video/fbdev/sh_mobile_lcdcfb.c        | 132 +-----
> > >>  drivers/video/fbdev/sh_mobile_lcdcfb.h        |   5 -
> > >>  include/linux/console_struct.h                |   5 +-
> > >>  include/linux/fb.h                            |  45 +-
> > >>  include/linux/fbcon.h                         |  30 ++
> > >>  27 files changed, 396 insertions(+), 782 deletions(-)
> > >>
> > >> --
> > >> 2.20.1
> > >>
> > > 
> > > --
> > > Daniel Vetter
> > > Software Engineer, Intel Corporation
> > > http://blog.ffwll.ch

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 00/33] fbcon notifier begone v3!
@ 2019-06-11 15:50         ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-06-11 15:50 UTC (permalink / raw)
  To: Daniel Thompson
  Cc: Linux Fbdev development list, Bartlomiej Zolnierkiewicz,
	Daniel Vetter, Intel Graphics Development, LKML, DRI Development,
	lee.jones

On Tue, Jun 11, 2019 at 03:16:35PM +0100, Daniel Thompson wrote:
> On Fri, Jun 07, 2019 at 12:07:55PM +0200, Bartlomiej Zolnierkiewicz wrote:
> > 
> > On 6/6/19 9:38 AM, Daniel Vetter wrote:
> > > Hi Bart,
> > 
> > Hi Daniel,
> > 
> > > On Tue, May 28, 2019 at 11:02:31AM +0200, Daniel Vetter wrote:
> > >> Hi all,
> > >>
> > >> I think we're slowly getting there. Previous cover letters with more
> > >> context:
> > >>
> > >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218362.html
> > >>
> > >> tldr; I have a multi-year plan to improve fbcon locking, because the
> > >> current thing is a bit a mess.
> > >>
> > >> Cover letter of this version, where I detail a bit more the details
> > >> fixed in this one here:
> > >>
> > >> https://lists.freedesktop.org/archives/dri-devel/2019-May/218984.html
> > >>
> > >> Note that the locking plan in this one is already outdated, I overlooked a
> > >> few fun issues around any printk() going back to console_lock.
> > >>
> > >> I think remaining bits:
> > >>
> > >> - Ack from Daniel Thompson for the backlight bits, he wanted to check the
> > >>   big picture.
> > > 
> > > I think Daniel is still on vacation until next week or so.
> 
> Thanks for spotting that. As it happens the e-mail asking for extra detail
> was just about the last thing I sent before going on holiday (exactly to
> try and avoid round trips this wee ;-) ).

Vacations notices are sometimes indeed useful :-)

> > >> - Hash out actual merge plan.
> > > 
> > > I'd like to stuff this into drm.git somehow, I guess topic branch works
> > > too.
> > 
> > I would like to have topic branch for this patchset.
> 
> From a backlight perspective its Lee Jones who hoovers up the patches
> and worries about hiding merge conflicts from Linus.
> 
> I'll let him follow up if needed but I suspect he'd like an immutable
> branch to work from also.

Ok I'll build the topic branch, get it tested a bit and then send the pull
around to everyone. Thanks for taking a look at the backlight side.
-Daniel

> 
> 
> Daniel.
> 
> 
> > 
> > > Long term I think we need to reconsider how we handle fbdev, at least the
> > > core/fbcon pieces. Since a few years all the work in that area has been
> > > motivated by drm, and pushed by drm contributors. Having that maintained
> > > in a separate tree that doesn't regularly integrate imo doesn't make much
> > > sense, and we ended up merging almost everything through some drm tree.
> > > That one time we didn't (for some panel rotation stuff) it resulted in
> > > some good suprises.
> > > 
> > > I think best solution is if we put the core and fbcon bits into drm-misc,
> > > as group maintained infrastructure piece. All the other gfx infra pieces
> > > are maintained in there already too. You'd obviously get commit rights.
> > > I think that would include
> > > - drivers/video/fbdev
> > > - drivers/video/*c
> > > - drivers/video/console
> > 
> > Sounds fine to me.
> > 
> > > I don't really care about what happens with the actual fbdev drivers
> > > (aside from the drm one in drm_fb_helper.c, but that's already maintained
> > > as part of drm). I guess we could also put those into drm-misc, or as a
> > > separate tree, depending what you want.
> > > 
> > > Thoughts?
> > 
> > I would like to handle fbdev changes for v5.3 merge window using fbdev
> > tree but after that everything (including changes to fbdev drivers) can go
> > through drm-misc tree.
> > 
> > Best regards,
> > --
> > Bartlomiej Zolnierkiewicz
> > Samsung R&D Institute Poland
> > Samsung Electronics
> > 
> > > Cheers, Daniel
> > > 
> > > 
> > >>
> > >> I'm also cc'ing the entire pile to a lot more people on request.
> > >>
> > >> Thanks, Daniel
> > >>
> > >> Daniel Vetter (33):
> > >>   dummycon: Sprinkle locking checks
> > >>   fbdev: locking check for fb_set_suspend
> > >>   vt: might_sleep() annotation for do_blank_screen
> > >>   vt: More locking checks
> > >>   fbdev/sa1100fb: Remove dead code
> > >>   fbdev/cyber2000: Remove struct display
> > >>   fbdev/aty128fb: Remove dead code
> > >>   fbcon: s/struct display/struct fbcon_display/
> > >>   fbcon: Remove fbcon_has_exited
> > >>   fbcon: call fbcon_fb_(un)registered directly
> > >>   fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify
> > >>   fbdev/omap: sysfs files can't disappear before the device is gone
> > >>   fbdev: sysfs files can't disappear before the device is gone
> > >>   staging/olpc: lock_fb_info can't fail
> > >>   fbdev/atyfb: lock_fb_info can't fail
> > >>   fbdev: lock_fb_info cannot fail
> > >>   fbcon: call fbcon_fb_bind directly
> > >>   fbdev: make unregister/unlink functions not fail
> > >>   fbdev: unify unlink_framebuffer paths
> > >>   fbdev/sh_mob: Remove fb notifier callback
> > >>   fbdev: directly call fbcon_suspended/resumed
> > >>   fbcon: Call fbcon_mode_deleted/new_modelist directly
> > >>   fbdev: Call fbcon_get_requirement directly
> > >>   Revert "backlight/fbcon: Add FB_EVENT_CONBLANK"
> > >>   fbmem: pull fbcon_fb_blanked out of fb_blank
> > >>   fbdev: remove FBINFO_MISC_USEREVENT around fb_blank
> > >>   fb: Flatten control flow in fb_set_var
> > >>   fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls
> > >>   vgaswitcheroo: call fbcon_remap_all directly
> > >>   fbcon: Call con2fb_map functions directly
> > >>   fbcon: Document what I learned about fbcon locking
> > >>   staging/olpc_dcon: Add drm conversion to TODO
> > >>   backlight: simplify lcd notifier
> > >>
> > >>  arch/arm/mach-pxa/am200epd.c                  |  13 +-
> > >>  drivers/gpu/vga/vga_switcheroo.c              |  11 +-
> > >>  drivers/media/pci/ivtv/ivtvfb.c               |   6 +-
> > >>  drivers/staging/fbtft/fbtft-core.c            |   4 +-
> > >>  drivers/staging/olpc_dcon/TODO                |   7 +
> > >>  drivers/staging/olpc_dcon/olpc_dcon.c         |   6 +-
> > >>  drivers/tty/vt/vt.c                           |  18 +
> > >>  drivers/video/backlight/backlight.c           |   2 +-
> > >>  drivers/video/backlight/lcd.c                 |  12 -
> > >>  drivers/video/console/dummycon.c              |   6 +
> > >>  drivers/video/fbdev/aty/aty128fb.c            |  64 ---
> > >>  drivers/video/fbdev/aty/atyfb_base.c          |   3 +-
> > >>  drivers/video/fbdev/core/fbcmap.c             |   6 +-
> > >>  drivers/video/fbdev/core/fbcon.c              | 313 ++++++--------
> > >>  drivers/video/fbdev/core/fbcon.h              |   6 +-
> > >>  drivers/video/fbdev/core/fbmem.c              | 399 +++++++-----------
> > >>  drivers/video/fbdev/core/fbsysfs.c            |  20 +-
> > >>  drivers/video/fbdev/cyber2000fb.c             |   1 -
> > >>  drivers/video/fbdev/neofb.c                   |   9 +-
> > >>  .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   |  21 +-
> > >>  drivers/video/fbdev/sa1100fb.c                |  25 --
> > >>  drivers/video/fbdev/savage/savagefb_driver.c  |   9 +-
> > >>  drivers/video/fbdev/sh_mobile_lcdcfb.c        | 132 +-----
> > >>  drivers/video/fbdev/sh_mobile_lcdcfb.h        |   5 -
> > >>  include/linux/console_struct.h                |   5 +-
> > >>  include/linux/fb.h                            |  45 +-
> > >>  include/linux/fbcon.h                         |  30 ++
> > >>  27 files changed, 396 insertions(+), 782 deletions(-)
> > >>
> > >> --
> > >> 2.20.1
> > >>
> > > 
> > > --
> > > Daniel Vetter
> > > Software Engineer, Intel Corporation
> > > http://blog.ffwll.ch

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 00/33] fbcon notifier begone v3!
  2019-06-11 14:16       ` Daniel Thompson
@ 2019-06-12  6:09         ` Lee Jones
  -1 siblings, 0 replies; 117+ messages in thread
From: Lee Jones @ 2019-06-12  6:09 UTC (permalink / raw)
  To: Daniel Thompson
  Cc: Bartlomiej Zolnierkiewicz, Daniel Vetter, LKML, DRI Development,
	Intel Graphics Development, Linux Fbdev development list,
	Daniel Vetter

On Tue, 11 Jun 2019, Daniel Thompson wrote:
> On Fri, Jun 07, 2019 at 12:07:55PM +0200, Bartlomiej Zolnierkiewicz wrote:
> > On 6/6/19 9:38 AM, Daniel Vetter wrote:
> > 
> > >> - Hash out actual merge plan.
> > > 
> > > I'd like to stuff this into drm.git somehow, I guess topic branch works
> > > too.
> > 
> > I would like to have topic branch for this patchset.
> 
> From a backlight perspective its Lee Jones who hoovers up the patches
> and worries about hiding merge conflicts from Linus.
> 
> I'll let him follow up if needed but I suspect he'd like an immutable
> branch to work from also.

Yes please.  Happy to either create one, or receive one.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

^ permalink raw reply	[flat|nested] 117+ messages in thread

* Re: [PATCH 00/33] fbcon notifier begone v3!
@ 2019-06-12  6:09         ` Lee Jones
  0 siblings, 0 replies; 117+ messages in thread
From: Lee Jones @ 2019-06-12  6:09 UTC (permalink / raw)
  To: Daniel Thompson
  Cc: Bartlomiej Zolnierkiewicz, Daniel Vetter, LKML, DRI Development,
	Intel Graphics Development, Linux Fbdev development list,
	Daniel Vetter

On Tue, 11 Jun 2019, Daniel Thompson wrote:
> On Fri, Jun 07, 2019 at 12:07:55PM +0200, Bartlomiej Zolnierkiewicz wrote:
> > On 6/6/19 9:38 AM, Daniel Vetter wrote:
> > 
> > >> - Hash out actual merge plan.
> > > 
> > > I'd like to stuff this into drm.git somehow, I guess topic branch works
> > > too.
> > 
> > I would like to have topic branch for this patchset.
> 
> From a backlight perspective its Lee Jones who hoovers up the patches
> and worries about hiding merge conflicts from Linus.
> 
> I'll let him follow up if needed but I suspect he'd like an immutable
> branch to work from also.

Yes please.  Happy to either create one, or receive one.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 19/33] fbdev: unify unlink_framebuffer paths
  2019-05-24  8:53 [PATCH 00/33] fbcon notifier begone! Daniel Vetter
@ 2019-05-24  8:53   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-24  8:53 UTC (permalink / raw)
  To: LKML
  Cc: Intel Graphics Development, DRI Development, Daniel Vetter,
	Daniel Vetter, Maarten Lankhorst, Bartlomiej Zolnierkiewicz,
	Michał Mirosław, Peter Rosin, Hans de Goede,
	Mikulas Patocka

For some reasons the pm_vt_switch_unregister call was missing from the
direct unregister_framebuffer path. Fix this.

v2: fbinfo->dev is used to decided whether unlink_framebuffer has been
called already. I botched that in v1. Make this all clearer by
inlining __unlink_framebuffer.

v3: Fix typoe in subject (Maarten).

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
---
 drivers/video/fbdev/core/fbmem.c | 47 ++++++++++++++------------------
 1 file changed, 20 insertions(+), 27 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index f3bcad30d3ba..bee45e9405b8 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1722,15 +1722,30 @@ static void unbind_console(struct fb_info *fb_info)
 	console_unlock();
 }
 
-static void __unlink_framebuffer(struct fb_info *fb_info);
-
-static void do_unregister_framebuffer(struct fb_info *fb_info)
+void unlink_framebuffer(struct fb_info *fb_info)
 {
-	unbind_console(fb_info);
+	int i;
+
+	i = fb_info->node;
+	if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
+		return;
+
+	if (!fb_info->dev)
+		return;
+
+	device_destroy(fb_class, MKDEV(FB_MAJOR, i));
 
 	pm_vt_switch_unregister(fb_info->dev);
 
-	__unlink_framebuffer(fb_info);
+	unbind_console(fb_info);
+
+	fb_info->dev = NULL;
+}
+EXPORT_SYMBOL(unlink_framebuffer);
+
+static void do_unregister_framebuffer(struct fb_info *fb_info)
+{
+	unlink_framebuffer(fb_info);
 	if (fb_info->pixmap.addr &&
 	    (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
 		kfree(fb_info->pixmap.addr);
@@ -1753,28 +1768,6 @@ static void do_unregister_framebuffer(struct fb_info *fb_info)
 	put_fb_info(fb_info);
 }
 
-static void __unlink_framebuffer(struct fb_info *fb_info)
-{
-	int i;
-
-	i = fb_info->node;
-	if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
-		return;
-
-	if (fb_info->dev) {
-		device_destroy(fb_class, MKDEV(FB_MAJOR, i));
-		fb_info->dev = NULL;
-	}
-}
-
-void unlink_framebuffer(struct fb_info *fb_info)
-{
-	__unlink_framebuffer(fb_info);
-
-	unbind_console(fb_info);
-}
-EXPORT_SYMBOL(unlink_framebuffer);
-
 /**
  * remove_conflicting_framebuffers - remove firmware-configured framebuffers
  * @a: memory range, users of which are to be removed
-- 
2.20.1


^ permalink raw reply	[flat|nested] 117+ messages in thread

* [PATCH 19/33] fbdev: unify unlink_framebuffer paths
@ 2019-05-24  8:53   ` Daniel Vetter
  0 siblings, 0 replies; 117+ messages in thread
From: Daniel Vetter @ 2019-05-24  8:53 UTC (permalink / raw)
  To: LKML
  Cc: Bartlomiej Zolnierkiewicz, Daniel Vetter,
	Intel Graphics Development, DRI Development,
	Michał Mirosław, Mikulas Patocka, Daniel Vetter,
	Peter Rosin

For some reasons the pm_vt_switch_unregister call was missing from the
direct unregister_framebuffer path. Fix this.

v2: fbinfo->dev is used to decided whether unlink_framebuffer has been
called already. I botched that in v1. Make this all clearer by
inlining __unlink_framebuffer.

v3: Fix typoe in subject (Maarten).

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: Peter Rosin <peda@axentia.se>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
---
 drivers/video/fbdev/core/fbmem.c | 47 ++++++++++++++------------------
 1 file changed, 20 insertions(+), 27 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index f3bcad30d3ba..bee45e9405b8 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1722,15 +1722,30 @@ static void unbind_console(struct fb_info *fb_info)
 	console_unlock();
 }
 
-static void __unlink_framebuffer(struct fb_info *fb_info);
-
-static void do_unregister_framebuffer(struct fb_info *fb_info)
+void unlink_framebuffer(struct fb_info *fb_info)
 {
-	unbind_console(fb_info);
+	int i;
+
+	i = fb_info->node;
+	if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
+		return;
+
+	if (!fb_info->dev)
+		return;
+
+	device_destroy(fb_class, MKDEV(FB_MAJOR, i));
 
 	pm_vt_switch_unregister(fb_info->dev);
 
-	__unlink_framebuffer(fb_info);
+	unbind_console(fb_info);
+
+	fb_info->dev = NULL;
+}
+EXPORT_SYMBOL(unlink_framebuffer);
+
+static void do_unregister_framebuffer(struct fb_info *fb_info)
+{
+	unlink_framebuffer(fb_info);
 	if (fb_info->pixmap.addr &&
 	    (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
 		kfree(fb_info->pixmap.addr);
@@ -1753,28 +1768,6 @@ static void do_unregister_framebuffer(struct fb_info *fb_info)
 	put_fb_info(fb_info);
 }
 
-static void __unlink_framebuffer(struct fb_info *fb_info)
-{
-	int i;
-
-	i = fb_info->node;
-	if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
-		return;
-
-	if (fb_info->dev) {
-		device_destroy(fb_class, MKDEV(FB_MAJOR, i));
-		fb_info->dev = NULL;
-	}
-}
-
-void unlink_framebuffer(struct fb_info *fb_info)
-{
-	__unlink_framebuffer(fb_info);
-
-	unbind_console(fb_info);
-}
-EXPORT_SYMBOL(unlink_framebuffer);
-
 /**
  * remove_conflicting_framebuffers - remove firmware-configured framebuffers
  * @a: memory range, users of which are to be removed
-- 
2.20.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 117+ messages in thread

end of thread, other threads:[~2019-06-12  6:09 UTC | newest]

Thread overview: 117+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-05-28  9:02 [PATCH 00/33] fbcon notifier begone v3! Daniel Vetter
2019-05-28  9:02 ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 01/33] dummycon: Sprinkle locking checks Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 02/33] fbdev: locking check for fb_set_suspend Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 03/33] vt: might_sleep() annotation for do_blank_screen Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 04/33] vt: More locking checks Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 05/33] fbdev/sa1100fb: Remove dead code Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 06/33] fbdev/cyber2000: Remove struct display Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 07/33] fbdev/aty128fb: Remove dead code Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 08/33] fbcon: s/struct display/struct fbcon_display/ Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 09/33] fbcon: Remove fbcon_has_exited Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 10/33] fbcon: call fbcon_fb_(un)registered directly Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 11/33] fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 12/33] fbdev/omap: sysfs files can't disappear before the device is gone Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 13/33] fbdev: " Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 14/33] staging/olpc: lock_fb_info can't fail Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 15/33] fbdev/atyfb: " Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 16/33] fbdev: lock_fb_info cannot fail Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 17/33] fbcon: call fbcon_fb_bind directly Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 18/33] fbdev: make unregister/unlink functions not fail Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 19/33] fbdev: unify unlink_framebuffer paths Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 20/33] fbdev/sh_mob: Remove fb notifier callback Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 21/33] fbdev: directly call fbcon_suspended/resumed Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 22/33] fbcon: Call fbcon_mode_deleted/new_modelist directly Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 23/33] fbdev: Call fbcon_get_requirement directly Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 24/33] Revert "backlight/fbcon: Add FB_EVENT_CONBLANK" Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-06-11 14:09   ` Daniel Thompson
2019-06-11 14:09     ` Daniel Thompson
2019-06-11 14:09     ` Daniel Thompson
2019-06-11 15:39     ` Daniel Vetter
2019-06-11 15:39       ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 25/33] fbmem: pull fbcon_fb_blanked out of fb_blank Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 26/33] fbdev: remove FBINFO_MISC_USEREVENT around fb_blank Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 27/33] fb: Flatten control flow in fb_set_var Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-05-28  9:02 ` [PATCH 28/33] fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls Daniel Vetter
2019-05-28  9:02   ` Daniel Vetter
2019-06-11 14:11   ` Daniel Thompson
2019-06-11 14:11     ` Daniel Thompson
2019-06-11 14:11     ` Daniel Thompson
2019-05-28  9:03 ` [PATCH 29/33] vgaswitcheroo: call fbcon_remap_all directly Daniel Vetter
2019-05-28  9:03   ` Daniel Vetter
2019-05-28  9:03 ` [PATCH 30/33] fbcon: Call con2fb_map functions directly Daniel Vetter
2019-05-28  9:03   ` Daniel Vetter
2019-05-28  9:03 ` [PATCH 31/33] fbcon: Document what I learned about fbcon locking Daniel Vetter
2019-05-28  9:03   ` Daniel Vetter
2019-05-28  9:03 ` [PATCH 32/33] staging/olpc_dcon: Add drm conversion to TODO Daniel Vetter
2019-05-28  9:03   ` Daniel Vetter
2019-05-28  9:03 ` [PATCH 33/33] backlight: simplify lcd notifier Daniel Vetter
2019-05-28  9:03   ` Daniel Vetter
2019-06-11 14:11   ` Daniel Thompson
2019-06-11 14:11     ` Daniel Thompson
2019-06-11 14:11     ` Daniel Thompson
2019-05-28 12:22 ` ✗ Fi.CI.CHECKPATCH: warning for fbcon notifier begone v3! Patchwork
2019-05-28 12:36 ` ✗ Fi.CI.SPARSE: " Patchwork
2019-05-28 12:41 ` ✓ Fi.CI.BAT: success " Patchwork
2019-05-28 18:11 ` ✓ Fi.CI.IGT: " Patchwork
2019-06-06  7:38 ` [PATCH 00/33] " Daniel Vetter
2019-06-06  7:38   ` Daniel Vetter
2019-06-07 10:07   ` Bartlomiej Zolnierkiewicz
2019-06-07 10:07     ` Bartlomiej Zolnierkiewicz
2019-06-07 14:43     ` Daniel Vetter
2019-06-07 14:43       ` Daniel Vetter
2019-06-07 14:43       ` Daniel Vetter
2019-06-11 14:16     ` Daniel Thompson
2019-06-11 14:16       ` Daniel Thompson
2019-06-11 14:16       ` Daniel Thompson
2019-06-11 15:50       ` Daniel Vetter
2019-06-11 15:50         ` Daniel Vetter
2019-06-11 15:50         ` Daniel Vetter
2019-06-12  6:09       ` Lee Jones
2019-06-12  6:09         ` Lee Jones
  -- strict thread matches above, loose matches on Subject: below --
2019-05-24  8:53 [PATCH 00/33] fbcon notifier begone! Daniel Vetter
2019-05-24  8:53 ` [PATCH 19/33] fbdev: unify unlink_framebuffer paths Daniel Vetter
2019-05-24  8:53   ` Daniel Vetter

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