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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2024-09-06 10:52:17 +0300 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2024-09-30 18:49:41 +0300 |
| commit | 48ffe2074c2864ab64ee2004e7ebf3d6a6730fbf (patch) | |
| tree | b112eb381da136b5ff5d28dbb70fd093c9c6caf7 /include | |
| parent | 26228256b796eb0145bdfb2ae34ec8c4c0ef1319 (diff) | |
| download | linux-48ffe2074c2864ab64ee2004e7ebf3d6a6730fbf.tar.xz | |
backlight: lcd: Add LCD_POWER_ constants for power states
Duplicate FB_BLANK_ constants as LCD_POWER_ constants in the lcd
header file. Allows lcd drivers to avoid including the fbdev header
file and removes a compile-time dependency between the two subsystems.
The new LCD_POWER_ constants have the same values as their
FB_BLANK_ counterparts. Hence semantics does not change and the lcd
drivers can be converted one by one. Each instance of FB_BLANK_UNBLANK
becomes LCD_POWER_ON, each of FB_BLANK_POWERDOWN becomes LCD_POWER_OFF,
FB_BLANK_NORMAL becomes LCD_POWER_REDUCED and FB_BLANK_VSYNC_SUSPEND
becomes LCD_POWER_REDUCED_VSYNC_SUSPEND.
Lcd code or drivers do not use FB_BLANK_HSYNC_SUSPEND, so no
new constants for this is being added. The tokens LCD_POWER_REDUCED
and LCD_POWER_REDUCED_VSYNC_SUSPEND are deprecated and drivers should
replace them with LCD_POWER_ON and LCD_POWER_OFF.
See also commit a1cacb8a8e70 ("backlight: Add BACKLIGHT_POWER_ constants
for power states"), which added similar constants for backlight drivers.
v2:
- fix typo in commit description
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Link: https://lore.kernel.org/r/20240906075439.98476-4-tzimmermann@suse.de
Signed-off-by: Lee Jones <lee@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/lcd.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/lcd.h b/include/linux/lcd.h index 68703a51dc53..dfcc54d327f5 100644 --- a/include/linux/lcd.h +++ b/include/linux/lcd.h @@ -14,6 +14,11 @@ #include <linux/notifier.h> #include <linux/fb.h> +#define LCD_POWER_ON (0) +#define LCD_POWER_REDUCED (1) // deprecated; don't use in new code +#define LCD_POWER_REDUCED_VSYNC_SUSPEND (2) // deprecated; don't use in new code +#define LCD_POWER_OFF (4) + /* Notes on locking: * * lcd_device->ops_lock is an internal backlight lock protecting the ops |