Commit bca5bea4 authored by Yu-ting Shen's avatar Yu-ting Shen Committed by Alex Deucher
Browse files

drm/amd/display: avoid link loss short pulse stuck the system 



[Why]
MST monitor sends link loss short pulse continuous but sink is
occupy by HDMI input to lead link training fail.

[How]
disable link once retraining fail.

Acked-by: default avatarAurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: default avatarYu-ting Shen <yu-tshen@amd.com>
Reviewed-by: default avatarWenjing Liu <Wenjing.Liu@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 670d2a62

drivers/gpu/drm/amd/display/dc/core/dc_link.c

+2 −0
Original line number Diff line number Diff line
@@ -4279,6 +4279,8 @@ void core_link_enable_stream( 
			 */

			if (status != DC_FAIL_DP_LINK_TRAINING ||

					pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST) {

				if (false == stream->link->link_status.link_active)

					disable_link(stream->link, pipe_ctx->stream->signal);

				BREAK_TO_DEBUGGER();

				return;

			}