diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2025-03-21 12:53:59 +0300 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2025-04-10 12:39:03 +0300 |
| commit | b01beb2f1f6bcda17634a5b529865ffc5a9b795f (patch) | |
| tree | 451b735697c8a866e128805729ce2b2efc7f7963 /drivers/video/fbdev/core | |
| parent | 4bfb77f3381627640e97e0e423c93a2ea93e7de7 (diff) | |
| download | linux-b01beb2f1f6bcda17634a5b529865ffc5a9b795f.tar.xz | |
backlight: Replace fb events with a dedicated function call
Remove support for fb events from backlight subsystem. Provide the
helper backlight_notify_blank_all() instead. Also export the existing
helper backlight_notify_blank() to update a single backlight device.
In fbdev, call either helper to inform the backlight subsystem of
changes to a display's blank state. If the framebuffer device has a
specific backlight, only update this one; otherwise update all.
v4:
- protect blacklight declarations with IS_REACHABLE() (kernel test robot)
v3:
- declare empty fb_bl_notify_blank() as static inline (kernel test robot)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Simona Vetter <simona.vetter@ffwll.ch>
Reviewed-by: "Daniel Thompson (RISCstar)" <danielt@kernel.org>
Link: https://lore.kernel.org/r/20250321095517.313713-7-tzimmermann@suse.de
Signed-off-by: Lee Jones <lee@kernel.org>
Diffstat (limited to 'drivers/video/fbdev/core')
| -rw-r--r-- | drivers/video/fbdev/core/fb_backlight.c | 12 | ||||
| -rw-r--r-- | drivers/video/fbdev/core/fbmem.c | 2 |
2 files changed, 14 insertions, 0 deletions
diff --git a/drivers/video/fbdev/core/fb_backlight.c b/drivers/video/fbdev/core/fb_backlight.c index 6fdaa9f81be9..dbed9696f4c5 100644 --- a/drivers/video/fbdev/core/fb_backlight.c +++ b/drivers/video/fbdev/core/fb_backlight.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-or-later +#include <linux/backlight.h> #include <linux/export.h> #include <linux/fb.h> #include <linux/mutex.h> @@ -36,4 +37,15 @@ struct backlight_device *fb_bl_device(struct fb_info *info) return info->bl_dev; } EXPORT_SYMBOL(fb_bl_device); + +void fb_bl_notify_blank(struct fb_info *info, int old_blank) +{ + bool on = info->blank == FB_BLANK_UNBLANK; + bool prev_on = old_blank == FB_BLANK_UNBLANK; + + if (info->bl_dev) + backlight_notify_blank(info->bl_dev, info->device, on, prev_on); + else + backlight_notify_blank_all(info->device, on, prev_on); +} #endif diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c index 9650b641d8e8..c931f270ac34 100644 --- a/drivers/video/fbdev/core/fbmem.c +++ b/drivers/video/fbdev/core/fbmem.c @@ -363,6 +363,8 @@ int fb_blank(struct fb_info *info, int blank) if (ret) goto err; + fb_bl_notify_blank(info, old_blank); + fb_notifier_call_chain(FB_EVENT_BLANK, &event); return 0; |