From bca5bea4030d59b2d100c997b8044033247c1a99 Mon Sep 17 00:00:00 2001 From: Yu-ting Shen Date: Tue, 19 Oct 2021 14:22:02 +0800 Subject: 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: Aurabindo Pillai Signed-off-by: Yu-ting Shen Reviewed-by: Wenjing Liu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/gpu/drm') diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index 2796bdd17de1..f14f71dd1aa9 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -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; } -- cgit v1.2.3