diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2015-06-16 16:27:48 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-06-19 01:10:44 +0200 |
| commit | 87521e16a7abbf3fa337f56cb4d1e18247f15e8a (patch) | |
| tree | 63ae44bbc4a4aaf0b48f03536c825d36baaf4238 /include/acpi | |
| parent | 14ca7a47d0ab2a7a35faab130e6d9682f8ff1a46 (diff) | |
acpi-video-detect: Rewrite backlight interface selection logic
Currently we have 2 kernel commandline options + dmi-quirks in 3 places all
interacting (in interesting ways) to select which which backlight interface
to use. On the commandline we've acpi_backlight=[video|vendor] and
video.use_native_backlight=[0|1]. DMI quirks we have in
acpi/video-detect.c, acpi/video.c and drivers/platform/x86/*.c .
This commit is the first step to cleaning this up, replacing the 2 cmdline
options with just acpi_backlight=[video|vendor|native|none], and adds a
new API to video_detect.c to reflect this.
Follow up commits will also move other related code, like unregistering the
acpi_video backlight interface if it was registered before other drivers
which take priority over it are loaded, to video_detect.c where this
logic really belongs.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/acpi')
| -rw-r--r-- | include/acpi/video.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/acpi/video.h b/include/acpi/video.h index 843ef1adfbfa..01b5cc78efd8 100644 --- a/include/acpi/video.h +++ b/include/acpi/video.h @@ -16,6 +16,14 @@ struct acpi_device; #define ACPI_VIDEO_DISPLAY_LEGACY_PANEL 0x0110 #define ACPI_VIDEO_DISPLAY_LEGACY_TV 0x0200 +enum acpi_backlight_type { + acpi_backlight_undef = -1, + acpi_backlight_none = 0, + acpi_backlight_video, + acpi_backlight_vendor, + acpi_backlight_native, +}; + #if (defined CONFIG_ACPI_VIDEO || defined CONFIG_ACPI_VIDEO_MODULE) extern int acpi_video_register(void); extern void acpi_video_unregister(void); @@ -23,6 +31,8 @@ extern void acpi_video_unregister_backlight(void); extern int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, void **edid); extern bool acpi_video_verify_backlight_support(void); +extern enum acpi_backlight_type acpi_video_get_backlight_type(void); +extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type); #else static inline int acpi_video_register(void) { return 0; } static inline void acpi_video_unregister(void) { return; } @@ -33,6 +43,13 @@ static inline int acpi_video_get_edid(struct acpi_device *device, int type, return -ENODEV; } static inline bool acpi_video_verify_backlight_support(void) { return false; } +static inline enum acpi_backlight_type acpi_video_get_backlight_type(void) +{ + return acpi_backlight_vendor; +} +static void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type) +{ +} #endif #endif |