diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2025-03-21 12:54:01 +0300 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2025-04-10 12:39:10 +0300 |
| commit | bc70cc84f5a2ebfd7e7112e9b8837e0c7954fc65 (patch) | |
| tree | 4ad452285b4e9c85a4515435eb8cbaad6e0aba40 /include/linux | |
| parent | e98696cea7e289447a5d2328546b947629301616 (diff) | |
| download | linux-bc70cc84f5a2ebfd7e7112e9b8837e0c7954fc65.tar.xz | |
backlight: lcd: Replace fb events with a dedicated function call
Remove support for fb events from the lcd subsystem. Provide the
helper lcd_notify_blank_all() instead. In fbdev, call
lcd_notify_blank_all() to inform the lcd subsystem of changes
to a display's blank state.
Fbdev maintains a list of all installed notifiers. Instead of fbdev
notifiers, maintain an internal list of lcd devices.
v3:
- export lcd_notify_mode_change_all() (kernel test robot)
v2:
- maintain global list of lcd devices
- avoid IS_REACHABLE() in source file
- use lock guards
- initialize lcd list and list mutex
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/20250321095517.313713-9-tzimmermann@suse.de
Signed-off-by: Lee Jones <lee@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/lcd.h | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/include/linux/lcd.h b/include/linux/lcd.h index c3ccdff4519a..d4fa03722b72 100644 --- a/include/linux/lcd.h +++ b/include/linux/lcd.h @@ -11,7 +11,6 @@ #include <linux/device.h> #include <linux/mutex.h> -#include <linux/notifier.h> #define LCD_POWER_ON (0) #define LCD_POWER_REDUCED (1) // deprecated; don't use in new code @@ -79,8 +78,11 @@ struct lcd_device { const struct lcd_ops *ops; /* Serialise access to set_power method */ struct mutex update_lock; - /* The framebuffer notifier block */ - struct notifier_block fb_notif; + + /** + * @entry: List entry of all registered lcd devices + */ + struct list_head entry; struct device dev; }; @@ -125,6 +127,19 @@ extern void lcd_device_unregister(struct lcd_device *ld); extern void devm_lcd_device_unregister(struct device *dev, struct lcd_device *ld); +#if IS_REACHABLE(CONFIG_LCD_CLASS_DEVICE) +void lcd_notify_blank_all(struct device *display_dev, int power); +void lcd_notify_mode_change_all(struct device *display_dev, + unsigned int width, unsigned int height); +#else +static inline void lcd_notify_blank_all(struct device *display_dev, int power) +{} + +static inline void lcd_notify_mode_change_all(struct device *display_dev, + unsigned int width, unsigned int height) +{} +#endif + #define to_lcd_device(obj) container_of(obj, struct lcd_device, dev) static inline void * lcd_get_data(struct lcd_device *ld_dev) |