diff options
Diffstat (limited to 'include/acpi/video.h')
| -rw-r--r-- | include/acpi/video.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/acpi/video.h b/include/acpi/video.h index 4230392b5b0b..044c463138df 100644 --- a/include/acpi/video.h +++ b/include/acpi/video.h @@ -50,6 +50,7 @@ enum acpi_backlight_type { acpi_backlight_native, acpi_backlight_nvidia_wmi_ec, acpi_backlight_apple_gmux, + acpi_backlight_dell_uart, }; #if IS_ENABLED(CONFIG_ACPI_VIDEO) @@ -75,6 +76,15 @@ 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; |