diff options
Diffstat (limited to 'include/acpi/video.h')
| -rw-r--r-- | include/acpi/video.h | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/include/acpi/video.h b/include/acpi/video.h index db8548ff03ce..044c463138df 100644 --- a/include/acpi/video.h +++ b/include/acpi/video.h @@ -48,15 +48,17 @@ enum acpi_backlight_type { acpi_backlight_video, acpi_backlight_vendor, acpi_backlight_native, + acpi_backlight_nvidia_wmi_ec, + acpi_backlight_apple_gmux, + acpi_backlight_dell_uart, }; #if IS_ENABLED(CONFIG_ACPI_VIDEO) extern int acpi_video_register(void); extern void acpi_video_unregister(void); +extern void acpi_video_register_backlight(void); extern int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, void **edid); -extern enum acpi_backlight_type acpi_video_get_backlight_type(void); -extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type); /* * Note: The value returned by acpi_video_handles_brightness_key_presses() * may change over time and should not be cached. @@ -65,9 +67,32 @@ extern bool acpi_video_handles_brightness_key_presses(void); extern int acpi_video_get_levels(struct acpi_device *device, struct acpi_video_device_brightness **dev_br, int *pmax_level); + +extern enum acpi_backlight_type __acpi_video_get_backlight_type(bool native, + bool *auto_detect); + +static inline enum acpi_backlight_type acpi_video_get_backlight_type(void) +{ + return __acpi_video_get_backlight_type(false, NULL); +} + +/* + * This function MUST only be called by GPU drivers to check if the driver + * should register a backlight class device. This function not only checks + * if a GPU native backlight device should be registered it *also* tells + * the ACPI video-detect code that native GPU backlight control is available. + * Therefor calling this from any place other then the GPU driver is wrong! + * To check if GPU native backlight control is used in other places instead use: + * if (acpi_video_get_backlight_type() == acpi_backlight_native) { ... } + */ +static inline bool acpi_video_backlight_use_native(void) +{ + return __acpi_video_get_backlight_type(true, NULL) == acpi_backlight_native; +} #else static inline int acpi_video_register(void) { return -ENODEV; } static inline void acpi_video_unregister(void) { return; } +static inline void acpi_video_register_backlight(void) { return; } static inline int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, void **edid) { @@ -77,8 +102,9 @@ static inline enum acpi_backlight_type acpi_video_get_backlight_type(void) { return acpi_backlight_vendor; } -static inline void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type) +static inline bool acpi_video_backlight_use_native(void) { + return true; } static inline bool acpi_video_handles_brightness_key_presses(void) { |