diff options
| author | Yu-ting Shen <yu-tshen@amd.com> | 2021-10-19 09:22:02 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-11-03 19:32:34 +0300 |
| commit | bca5bea4030d59b2d100c997b8044033247c1a99 (patch) | |
| tree | 040608a99fef9416770227c282e7c96d0548a1ea /drivers/gpu/drm | |
| parent | 670d2a6240536bb7a5dabbd7eb32ebec8c033301 (diff) | |
| download | linux-bca5bea4030d59b2d100c997b8044033247c1a99.tar.xz | |
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 <aurabindo.pillai@amd.com>
Signed-off-by: Yu-ting Shen <yu-tshen@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link.c | 2 |
1 files changed, 2 insertions, 0 deletions
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; } |