From: Thomas Zimmermann <tzimmermann@suse.de>
To: Daniel Vetter <daniel.vetter@ffwll.ch>,
DRI Development <dri-devel@lists.freedesktop.org>
Cc: "Intel Graphics Development" <intel-gfx@lists.freedesktop.org>,
LKML <linux-kernel@vger.kernel.org>,
"Daniel Vetter" <daniel.vetter@intel.com>,
"Bartlomiej Zolnierkiewicz" <b.zolnierkie@samsung.com>,
"Hans de Goede" <hdegoede@redhat.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Noralf Trønnes" <noralf@tronnes.org>,
"Yisheng Xie" <ysxie@foxmail.com>,
"Peter Rosin" <peda@axentia.se>,
"Michał Mirosław" <mirq-linux@rere.qmqm.pl>,
"Mikulas Patocka" <mpatocka@redhat.com>,
linux-fbdev@vger.kernel.org
Subject: Re: [PATCH 10/33] fbcon: call fbcon_fb_(un)registered directly
Date: Mon, 20 May 2019 10:37:53 +0200 [thread overview]
Message-ID: <8aecc0d8-83a3-8144-a266-441a5c1d5db5@suse.de> (raw)
In-Reply-To: <423eba4b-15e1-f10b-ae2d-855b8a585688@suse.de>
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Hi
Am 20.05.19 um 10:33 schrieb Thomas Zimmermann:
> Hi
>
> Am 20.05.19 um 10:21 schrieb Daniel Vetter:
> ...
>> diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
>> index fc3d34a8ea5b..ae2db31eeba7 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 +1722,6 @@ 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;
>> if (!lockless_register_fb)
>> console_lock();
>> else
>> @@ -1732,9 +1730,8 @@ 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);
>
> What about backlight drivers? [1] Apparently these also use the
> notifiers. [2] From my understanding, backlight drivers would stop
> working with this change.
I just saw that backlight drivers only care about blanking and
unblanking. Never mind then.
Best regards
Thomas
>
> Best regards
> Thomas
>
> [1]
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/video/backlight
> [2]
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/video/backlight/backlight.c#n40
>
>> unlock_fb_info(fb_info);
>> unlock_console:
>> if (!lockless_register_fb)
>> @@ -1771,7 +1768,6 @@ 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 +1785,8 @@ 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;
>> 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..701abaf79c87 100644
>> --- a/include/linux/fb.h
>> +++ b/include/linux/fb.h
>> @@ -136,10 +136,6 @@ 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 */
>> -#define FB_EVENT_FB_REGISTERED 0x05
>> -/* A driver unregistered itself */
>> -#define FB_EVENT_FB_UNREGISTERED 0x06
>> /* 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 */
>>
>
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Linux GmbH, Maxfeldstrasse 5, 90409 Nuernberg, Germany
GF: Felix Imendörffer, Mary Higgins, Sri Rasiah
HRB 21284 (AG Nürnberg)
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next prev parent reply other threads:[~2019-05-20 8:37 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-20 8:21 [PATCH 00/33] fbcon notifier begone! Daniel Vetter
2019-05-20 8:21 ` [PATCH 01/33] dummycon: Sprinkle locking checks Daniel Vetter
2019-05-20 8:21 ` [PATCH 02/33] fbdev: locking check for fb_set_suspend Daniel Vetter
2019-05-20 8:21 ` [PATCH 03/33] vt: might_sleep() annotation for do_blank_screen Daniel Vetter
2019-05-20 8:21 ` [PATCH 04/33] vt: More locking checks Daniel Vetter
2019-05-20 8:21 ` [PATCH 05/33] fbdev/sa1100fb: Remove dead code Daniel Vetter
2019-05-20 8:21 ` [PATCH 06/33] fbdev/cyber2000: Remove struct display Daniel Vetter
2019-05-20 8:21 ` [PATCH 07/33] fbdev/aty128fb: Remove dead code Daniel Vetter
2019-05-20 8:21 ` [PATCH 08/33] fbcon: s/struct display/struct fbcon_display/ Daniel Vetter
2019-05-20 8:21 ` [PATCH 09/33] fbcon: Remove fbcon_has_exited Daniel Vetter
2019-05-21 14:23 ` [PATCH] " Daniel Vetter
2019-05-22 10:04 ` Bartlomiej Zolnierkiewicz
2019-05-22 10:38 ` Daniel Vetter
2019-05-20 8:21 ` [PATCH 10/33] fbcon: call fbcon_fb_(un)registered directly Daniel Vetter
2019-05-20 8:33 ` Thomas Zimmermann
2019-05-20 8:37 ` Thomas Zimmermann [this message]
2019-05-21 15:09 ` Daniel Vetter
2019-05-20 17:08 ` Sam Ravnborg
2019-05-20 17:25 ` Daniel Vetter
2019-05-20 8:21 ` [PATCH 11/33] fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify Daniel Vetter
2019-05-20 9:04 ` Geert Uytterhoeven
2019-05-20 8:21 ` [PATCH 12/33] fbdev/omap: sysfs files can't disappear before the device is gone Daniel Vetter
2019-05-20 8:21 ` [PATCH 13/33] fbdev: " Daniel Vetter
2019-05-20 8:21 ` [PATCH 14/33] staging/olpc: lock_fb_info can't fail Daniel Vetter
2019-05-20 8:21 ` [PATCH 15/33] fbdev/atyfb: " Daniel Vetter
2019-05-20 8:21 ` [PATCH 16/33] fbdev: lock_fb_info cannot fail Daniel Vetter
2019-05-20 8:22 ` [PATCH 17/33] fbcon: call fbcon_fb_bind directly Daniel Vetter
2019-05-20 8:22 ` [PATCH 18/33] fbdev: make unregister/unlink functions not fail Daniel Vetter
2019-05-20 19:08 ` [Intel-gfx] " kbuild test robot
2019-05-20 19:25 ` kbuild test robot
2019-05-20 21:45 ` kbuild test robot
2019-05-20 8:22 ` [PATCH 19/33] fbdev: unify unlink_framebufer paths Daniel Vetter
2019-05-21 10:52 ` Maarten Lankhorst
2019-05-20 8:22 ` [PATCH 20/33] fbdev/sh_mob: Remove fb notifier callback Daniel Vetter
2019-05-20 9:05 ` Geert Uytterhoeven
2019-05-20 9:19 ` Daniel Vetter
2019-05-20 8:22 ` [PATCH 21/33] fbdev: directly call fbcon_suspended/resumed Daniel Vetter
2019-05-20 19:24 ` kbuild test robot
2019-05-20 8:22 ` [PATCH 22/33] fbcon: Call fbcon_mode_deleted/new_modelist directly Daniel Vetter
2019-05-20 8:22 ` [PATCH 23/33] fbdev: Call fbcon_get_requirement directly Daniel Vetter
2019-05-20 8:22 ` [PATCH 24/33] Revert "backlight/fbcon: Add FB_EVENT_CONBLANK" Daniel Vetter
2019-05-20 8:22 ` [PATCH 25/33] fbcon: directly call fbcon_fb_blanked Daniel Vetter
2019-05-20 8:22 ` [PATCH 26/33] fbmem: pull fbcon_fb_blanked out of fb_blank Daniel Vetter
2019-05-20 8:22 ` [PATCH 27/33] fbdev: remove FBINFO_MISC_USEREVENT around fb_blank Daniel Vetter
2019-05-20 17:20 ` Sam Ravnborg
2019-05-20 17:29 ` Daniel Vetter
2019-05-20 17:53 ` Sam Ravnborg
2019-05-20 8:22 ` [PATCH 28/33] fb: Flatten control flow in fb_set_var Daniel Vetter
2019-05-20 8:22 ` [PATCH 29/33] fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls Daniel Vetter
2019-05-21 10:56 ` Maarten Lankhorst
2019-05-21 12:42 ` Daniel Vetter
2019-05-20 8:22 ` [PATCH 30/33] vgaswitcheroo: call fbcon_remap_all directly Daniel Vetter
2019-05-20 8:37 ` Lukas Wunner
2019-05-20 8:22 ` [PATCH 31/33] fbcon: Call con2fb_map functions directly Daniel Vetter
2019-05-20 19:28 ` [Intel-gfx] " kbuild test robot
2019-05-20 19:34 ` kbuild test robot
2019-05-20 8:22 ` [PATCH 32/33] fbcon: Document what I learned about fbcon locking Daniel Vetter
2019-05-21 11:13 ` Maarten Lankhorst
2019-05-20 8:22 ` [PATCH 33/33] staging/olpc_dcon: Add drm conversion to TODO Daniel Vetter
2019-05-24 8:53 [PATCH 00/33] fbcon notifier begone! Daniel Vetter
2019-05-24 8:53 ` [PATCH 10/33] fbcon: call fbcon_fb_(un)registered directly Daniel Vetter
2019-05-28 9:02 [PATCH 00/33] fbcon notifier begone v3! Daniel Vetter
2019-05-28 9:02 ` [PATCH 10/33] fbcon: call fbcon_fb_(un)registered directly Daniel Vetter
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