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drm/amd/display: Add support for disconnected eDP streams

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[ Upstream commit 6571bef25fe48c642f7a69ccf7c3198b317c136a ]

[Why]
eDP may not be connected to the GPU on driver start causing
fail enumeration.

[How]
Move the virtual signal type check before the eDP connector
signal check.

Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Harry VanZyllDeJong <hvanzyll@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Harry VanZyllDeJong
2025-02-07 13:46:53 -05:00
committed by Greg Kroah-Hartman
parent 671fea645a
commit df8970a270
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
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@@ -920,6 +920,9 @@ bool link_decide_link_settings(struct dc_stream_state *stream,
* TODO: add MST specific link training routine
*/
decide_mst_link_settings(link, link_setting);
} else if (stream->signal == SIGNAL_TYPE_VIRTUAL) {
link_setting->lane_count = LANE_COUNT_FOUR;
link_setting->link_rate = LINK_RATE_HIGH3;
} else if (link->connector_signal == SIGNAL_TYPE_EDP) {
/* enable edp link optimization for DSC eDP case */
if (stream->timing.flags.DSC) {