Commit 1c093862 authored by Mario Limonciello's avatar Mario Limonciello Committed by Alex Deucher
Browse files

drm/amd/display: Fix programming backlight on OLED panels 



commit 38077562 ("drm/amd/display: Implement new
backlight_level_params structure") adjusted DC core to require
the backlight type to be programmed in the dc link when changing
brightness.  This isn't initialized in amdgpu_dm for OLED panels
though which broke brightness.

Explicitly initialize when aux support is enabled.

Reported-and-tested-by: default avatarLuke Jones <luke@ljones.dev>
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3792


Fixes: 38077562 ("drm/amd/display: Implement new backlight_level_params structure")
Reviewed-by: default avatarHarry Wentland <harry.wentland@amd.com>
Link: https://lore.kernel.org/r/20241128032200.2085398-1-superm1@kernel.org


Signed-off-by: default avatarMario Limonciello <mario.limonciello@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 0f15cbc2

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

+2 −0
Original line number Diff line number Diff line
@@ -3481,6 +3481,8 @@ static void update_connector_ext_caps(struct amdgpu_dm_connector *aconnector) 
		caps->aux_support = false;

	else if (amdgpu_backlight == 1)

		caps->aux_support = true;

	if (caps->aux_support)

		aconnector->dc_link->backlight_control_type = BACKLIGHT_CONTROL_AMD_AUX;



	luminance_range = &conn_base->display_info.luminance_range;