From: Sam Ravnborg <sam@ravnborg.org>
To: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: DRI Development <dri-devel@lists.freedesktop.org>,
linux-fbdev@vger.kernel.org, Zheyu Ma <zheyuma97@gmail.com>,
Xiyu Yang <xiyuyang19@fudan.edu.cn>,
Jens Frederich <jfrederich@gmail.com>,
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
linux-staging@lists.linux.dev,
LKML <linux-kernel@vger.kernel.org>,
Matthew Wilcox <willy@infradead.org>,
Zhen Lei <thunder.leizhen@huawei.com>,
Guenter Roeck <linux@roeck-us.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alex Deucher <alexander.deucher@amd.com>,
Daniel Vetter <daniel.vetter@intel.com>,
Jon Nettleton <jon.nettleton@gmail.com>,
Helge Deller <deller@gmx.de>
Subject: Re: [PATCH 21/21] fbdev: Make registered_fb[] private to fbmem.c
Date: Tue, 8 Feb 2022 20:00:38 +0100 [thread overview]
Message-ID: <YgK91i6zHWPBwYOq@ravnborg.org> (raw)
In-Reply-To: <20220131210552.482606-22-daniel.vetter@ffwll.ch>
Hi Daniel,
On Mon, Jan 31, 2022 at 10:05:52PM +0100, Daniel Vetter wrote:
> Well except when the olpc dcon fbdev driver is enabled, that thing
> digs around in there in rather unfixable ways.
>
> Cc oldc_dcon maintainers as fyi.
>
> Cc: Jens Frederich <jfrederich@gmail.com>
> Cc: Jon Nettleton <jon.nettleton@gmail.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: linux-staging@lists.linux.dev
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: Helge Deller <deller@gmx.de>
> Cc: Matthew Wilcox <willy@infradead.org>
> Cc: Sam Ravnborg <sam@ravnborg.org>
> Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
> Cc: Zhen Lei <thunder.leizhen@huawei.com>
> Cc: Alex Deucher <alexander.deucher@amd.com>
> Cc: Xiyu Yang <xiyuyang19@fudan.edu.cn>
> Cc: linux-fbdev@vger.kernel.org
> Cc: Zheyu Ma <zheyuma97@gmail.com>
> Cc: Guenter Roeck <linux@roeck-us.net>
with the build thingy fixed:
Acked-by: Sam Ravnborg <sam@ravnborg.org>
I do wonder if there is a more clean way to trigger a blank
in the main fbdev driver from the olpc driver.
The current hack is not nice and it would be good to see it gone.
Sam
> ---
> drivers/video/fbdev/core/fbmem.c | 8 ++++++--
> include/linux/fb.h | 7 +++----
> 2 files changed, 9 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
> index 904ef1250677..dad6572942fa 100644
> --- a/drivers/video/fbdev/core/fbmem.c
> +++ b/drivers/video/fbdev/core/fbmem.c
> @@ -48,10 +48,14 @@
> static DEFINE_MUTEX(registration_lock);
>
> struct fb_info *registered_fb[FB_MAX] __read_mostly;
> -EXPORT_SYMBOL(registered_fb);
> -
> int num_registered_fb __read_mostly;
> +#if IS_ENABLED(CONFIG_OLPC_DCON)
> +EXPORT_SYMBOL(registered_fb);
> EXPORT_SYMBOL(num_registered_fb);
> +#endif
> +#define for_each_registered_fb(i) \
> + for (i = 0; i < FB_MAX; i++) \
> + if (!registered_fb[i]) {} else
>
> bool fb_center_logo __read_mostly;
>
> diff --git a/include/linux/fb.h b/include/linux/fb.h
> index a8a00d2ba1f3..e236817502c2 100644
> --- a/include/linux/fb.h
> +++ b/include/linux/fb.h
> @@ -622,16 +622,15 @@ extern int fb_get_color_depth(struct fb_var_screeninfo *var,
> extern int fb_get_options(const char *name, char **option);
> extern int fb_new_modelist(struct fb_info *info);
>
> +#if IS_ENABLED(CONFIG_OLPC_DCON)
> extern struct fb_info *registered_fb[FB_MAX];
> +
> extern int num_registered_fb;
> +#endif
> extern bool fb_center_logo;
> extern int fb_logo_count;
> extern struct class *fb_class;
>
> -#define for_each_registered_fb(i) \
> - for (i = 0; i < FB_MAX; i++) \
> - if (!registered_fb[i]) {} else
> -
> static inline void lock_fb_info(struct fb_info *info)
> {
> mutex_lock(&info->lock);
> --
> 2.33.0
next prev parent reply other threads:[~2022-02-08 19:01 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-31 21:05 [PATCH 00/21] some fbcon patches, mostly locking Daniel Vetter
2022-01-31 21:05 ` [PATCH 01/21] MAINTAINERS: Add entry for fbdev core Daniel Vetter
2022-02-01 10:19 ` Thomas Zimmermann
2022-02-01 10:45 ` Greg Kroah-Hartman
2022-02-01 10:32 ` Helge Deller
2022-02-01 14:01 ` Javier Martinez Canillas
2022-02-01 14:47 ` Jani Nikula
2022-02-01 14:54 ` Geert Uytterhoeven
2022-02-01 20:47 ` Dave Airlie
2022-02-02 11:10 ` Daniel Stone
2022-02-02 11:18 ` Tomi Valkeinen
2022-02-02 11:31 ` Maxime Ripard
2022-02-02 13:48 ` Alex Deucher
2022-02-03 20:25 ` Sam Ravnborg
2022-02-08 14:12 ` Daniel Vetter
2022-01-31 21:05 ` [PATCH 02/21] fbcon: Resurrect fbcon accelerated scrolling code Daniel Vetter
2022-01-31 21:05 ` [PATCH 03/21] fbcon: Restore fbcon scrolling acceleration Daniel Vetter
2022-02-01 10:16 ` Helge Deller
2022-02-01 10:17 ` Helge Deller
2022-02-01 10:36 ` Daniel Vetter
2022-02-01 11:01 ` Helge Deller
2022-02-01 13:45 ` Daniel Vetter
2022-02-01 14:52 ` Helge Deller
2022-02-01 16:30 ` Daniel Vetter
2022-01-31 21:05 ` [PATCH 04/21] fbcon: delete a few unneeded forward decl Daniel Vetter
2022-02-03 20:30 ` Sam Ravnborg
2022-02-04 10:00 ` Geert Uytterhoeven
2022-01-31 21:05 ` [PATCH 05/21] fbcon: Introduce wrapper for console->fb_info lookup Daniel Vetter
2022-02-03 21:25 ` Sam Ravnborg
2022-01-31 21:05 ` [PATCH 06/21] fbcon: delete delayed loading code Daniel Vetter
2022-02-03 20:45 ` Sam Ravnborg
2022-02-08 13:42 ` Daniel Vetter
2022-02-08 18:09 ` Sam Ravnborg
2022-01-31 21:05 ` [PATCH 07/21] fbdev/sysfs: Fix locking Daniel Vetter
2022-02-03 21:27 ` Sam Ravnborg
2022-01-31 21:05 ` [PATCH 08/21] fbcon: Use delayed work for cursor Daniel Vetter
2022-01-31 21:05 ` [PATCH 09/21] fbcon: Replace FBCON_FLAGS_INIT with a boolean Daniel Vetter
2022-02-01 10:37 ` Thomas Zimmermann
2022-02-03 13:47 ` Geert Uytterhoeven
2022-02-03 21:30 ` Sam Ravnborg
2022-01-31 21:05 ` [PATCH 10/21] fb: Delete fb_info->queue Daniel Vetter
2022-02-03 21:31 ` Sam Ravnborg
2022-02-08 13:46 ` Daniel Vetter
2022-02-08 18:22 ` Sam Ravnborg
2022-01-31 21:05 ` [PATCH 11/21] fbcon: Extract fbcon_open/release helpers Daniel Vetter
2022-02-03 21:15 ` Sam Ravnborg
2022-02-03 21:32 ` Sam Ravnborg
2022-02-08 13:48 ` Daniel Vetter
2022-02-08 18:24 ` Sam Ravnborg
2022-02-08 19:51 ` [Intel-gfx] " Daniel Vetter
2022-01-31 21:05 ` [PATCH 12/21] fbcon: Ditch error handling for con2fb_release_oldinfo Daniel Vetter
2022-02-03 21:16 ` Sam Ravnborg
2022-01-31 21:05 ` [PATCH 13/21] fbcon: move more common code into fb_open() Daniel Vetter
2022-01-31 23:31 ` [Intel-gfx] " kernel test robot
2022-02-04 19:35 ` Sam Ravnborg
2022-02-08 13:53 ` Daniel Vetter
2022-02-08 18:25 ` Sam Ravnborg
2022-01-31 21:05 ` [PATCH 14/21] fbcon: use lock_fb_info in fbcon_open/release Daniel Vetter
2022-02-04 19:39 ` Sam Ravnborg
2022-01-31 21:05 ` [PATCH 15/21] fbcon: Consistently protect deferred_takeover with console_lock() Daniel Vetter
2022-02-04 19:45 ` Sam Ravnborg
2022-01-31 21:05 ` [PATCH 16/21] fbcon: Move console_lock for register/unlink/unregister Daniel Vetter
2022-02-04 19:54 ` Sam Ravnborg
2022-02-08 13:56 ` Daniel Vetter
2022-01-31 21:05 ` [PATCH 17/21] fbcon: Move more code into fbcon_release Daniel Vetter
2022-02-04 19:55 ` Sam Ravnborg
2022-01-31 21:05 ` [PATCH 18/21] fbcon: untangle fbcon_exit Daniel Vetter
2022-02-04 20:06 ` Sam Ravnborg
2022-02-08 13:58 ` Daniel Vetter
2022-02-08 18:27 ` Sam Ravnborg
2022-01-31 21:05 ` [PATCH 19/21] fbcon: Maintain a private array of fb_info Daniel Vetter
2022-02-04 20:15 ` Sam Ravnborg
2022-02-08 14:03 ` Daniel Vetter
2022-02-08 18:55 ` Sam Ravnborg
2022-01-31 21:05 ` [PATCH 20/21] Revert "fbdev: Prevent probing generic drivers if a FB is already registered" Daniel Vetter
2022-01-31 21:05 ` [PATCH 21/21] fbdev: Make registered_fb[] private to fbmem.c Daniel Vetter
2022-02-01 8:13 ` [Intel-gfx] " kernel test robot
2022-02-04 8:30 ` Geert Uytterhoeven
2022-02-08 14:04 ` Daniel Vetter
2022-02-08 20:59 ` Daniel Vetter
2022-02-08 19:00 ` Sam Ravnborg [this message]
2022-02-08 20:56 ` Daniel Vetter
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