diff options
| author | Mario Limonciello <superm1@kernel.org> | 2025-08-24 23:20:58 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-09-06 00:38:41 +0300 |
| commit | 68f3c044f37d9f50d67417fa8018d9cf16423458 (patch) | |
| tree | 138f1c1eebb0f243750530028b1767cca1fa54ad /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | |
| parent | 895b61395eefd28376250778a741f11e12715a39 (diff) | |
| download | linux-68f3c044f37d9f50d67417fa8018d9cf16423458.tar.xz | |
drm/amd/display: Indicate when custom brightness curves are in use
[Why]
There is a `scale` sysfs attribute that can be used to indicate when
non-linear brightness scaling is in use. As Custom brightness curves
work by linear interpolation of points the scale is no longer linear.
[How]
Indicate non-linear scaling when custom brightness curves in use and
linear scaling otherwise.
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Mario Limonciello <superm1@kernel.org>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 5 |
1 files changed, 4 insertions, 1 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 dc4d04a8ce6b..8d13212ff4ab 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -5060,8 +5060,11 @@ amdgpu_dm_register_backlight_device(struct amdgpu_dm_connector *aconnector) } else props.brightness = props.max_brightness = MAX_BACKLIGHT_LEVEL; - if (caps->data_points && !(amdgpu_dc_debug_mask & DC_DISABLE_CUSTOM_BRIGHTNESS_CURVE)) + if (caps->data_points && !(amdgpu_dc_debug_mask & DC_DISABLE_CUSTOM_BRIGHTNESS_CURVE)) { drm_info(drm, "Using custom brightness curve\n"); + props.scale = BACKLIGHT_SCALE_NON_LINEAR; + } else + props.scale = BACKLIGHT_SCALE_LINEAR; props.type = BACKLIGHT_RAW; snprintf(bl_name, sizeof(bl_name), "amdgpu_bl%d", |