Commit b448d30b authored Jun 22, 2020 by hersen wu Committed by Alex Deucher Jul 14, 2020

drm/amd/display: OLED panel backlight adjust not work with external display connected



[Why]
amdgpu_dm->backlight_caps is for single eDP only. the caps are upddated
for very connector. Real eDP caps will be overwritten by other external
display. For OLED panel, caps->aux_support is set to 1 for OLED pnael.
after external connected, caps+.aux_support is set to 0. This causes
OLED backlight adjustment not work.

[How]
within update_conector_ext_caps, backlight caps will be updated only for
eDP connector.

Cc: stable@vger.kernel.org
Signed-off-by: hersen wu <hersenxs.wu@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent 31684701

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

+5 −0

Original line number	Diff line number	Diff line
		@@ -2019,6 +2019,7 @@ static void update_connector_ext_caps(struct amdgpu_dm_connector *aconnector)
		struct amdgpu_display_manager *dm;
		struct drm_connector *conn_base;
		struct amdgpu_device *adev;
		struct dc_link *link = NULL;
		static const u8 pre_computed_values[] = {
		50, 51, 52, 53, 55, 56, 57, 58, 59, 61, 62, 63, 65, 66, 68, 69,
		71, 72, 74, 75, 77, 79, 81, 82, 84, 86, 88, 90, 92, 94, 96, 98};
		@@ -2026,6 +2027,10 @@ static void update_connector_ext_caps(struct amdgpu_dm_connector *aconnector)
		if (!aconnector \|\| !aconnector->dc_link)
		return;

		link = aconnector->dc_link;
		if (link->connector_signal != SIGNAL_TYPE_EDP)
		return;

		conn_base = &aconnector->base;
		adev = conn_base->dev->dev_private;
		dm = &adev->dm;

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