From 10dab1934b4b4e56f5b6f07ed021b1ac663c5888 Mon Sep 17 00:00:00 2001 From: Hersen Wu Date: Tue, 30 Jan 2018 11:46:16 -0500 Subject: [PATCH] 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 Reviewed-by: Tony Cheng Acked-by: Harry Wentland Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 4ee4c03a6724..604fb0171ee3 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -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; } -- 2.11.0