diff options
| author | Roman Li <Roman.Li@amd.com> | 2026-08-21 12:19:10 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-09-02 16:51:47 -0400 |
| commit | 5a67d2e055897a36acb4e48082986fb4a4eebdd3 (patch) | |
| tree | 3ff2cbb584dac83fa73a65ed9f561057aedcae01 | |
| parent | 93a77d353cb26772ae2fba50ae7321ae996b7f00 (diff) | |
| download | linux-5a67d2e055897a36acb4e48082986fb4a4eebdd3.tar.gz linux-5a67d2e055897a36acb4e48082986fb4a4eebdd3.zip | |
drm/amd/display: Fix backlight control for luminance-capable OLED
[WHY]
For some eDP panels VESA aux backlight control is necessary,
otherwise they stay black.
[HOW]
When AUX backlight control is used, select BACKLIGHT_CONTROL_VESA_AUX for
panels that advertise panel_luminance_control.
Reviewed-by: Hansen Dsouza <hansen.dsouza@amd.com>
Signed-off-by: Roman Li <Roman.Li@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 42f698bd061d76d5f4c84a195e465cfbeec775e4)
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c index e61bbc310f33..b9e90ea449ca 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c @@ -534,8 +534,12 @@ void amdgpu_dm_update_connector_ext_caps(struct amdgpu_dm_connector *aconnector) else if (!IS_ERR_OR_NULL(panel_backlight_quirk) && panel_backlight_quirk->force_pwm) caps->aux_support = false; - if (caps->aux_support) - aconnector->dc_link->backlight_control_type = BACKLIGHT_CONTROL_AMD_AUX; + if (caps->aux_support) { + if (aconnector->dc_link->dpcd_caps.panel_luminance_control) + aconnector->dc_link->backlight_control_type = BACKLIGHT_CONTROL_VESA_AUX; + else + aconnector->dc_link->backlight_control_type = BACKLIGHT_CONTROL_AMD_AUX; + } luminance_range = &conn_base->display_info.luminance_range; |