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drm/amd/display: VGA black screen from s3 when attached to hook 

[Description] For MST, DC already notify MST sink for MST mode, DC stll
check DP SINK DPCD register to see if MST enabled. DP RX firmware may
not handle this properly.

Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hersen Wu 2018-01-30 11:46:16 -05:00 committed by Alex Deucher
parent 9a6995ce9b
commit 10dab1934b
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
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@ -1465,7 +1465,7 @@ void decide_link_settings(struct dc_stream_state *stream,
/* MST doesn't perform link training for now
* TODO: add MST specific link training routine
*/
if (is_mst_supported(link)) {
if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST) {
*link_setting = link->verified_link_cap;
return;
}