diff options
| author | David Francis <David.Francis@amd.com> | 2018-07-18 16:03:30 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-08-06 14:35:24 -0500 |
| commit | 53a53f8687faf492df2644d8c18ff0217fc18730 (patch) | |
| tree | d7ab0001fd31a69ad0b4487d14cce083afb9450c /drivers/gpu/drm | |
| parent | 620a0d27b211aa03d3f99accfdd58b88e6e0504c (diff) | |
drm/amd/display: Read back max backlight value at boot
[Why]
If there is no program explicitly setting the backlight
brightness (for example, during a minimal install of linux), the
hardware defaults to maximum brightness but the backlight_device
defaults to 0 value. Thus, settings displays the wrong brightness
value.
[How]
When creating the backlight device, set brightness to max
Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index dcae658fbc50..34f34823bab5 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -1340,6 +1340,7 @@ amdgpu_dm_register_backlight_device(struct amdgpu_display_manager *dm) struct backlight_properties props = { 0 }; props.max_brightness = AMDGPU_MAX_BL_LEVEL; + props.brightness = AMDGPU_MAX_BL_LEVEL; props.type = BACKLIGHT_RAW; snprintf(bl_name, sizeof(bl_name), "amdgpu_bl%d", |