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drm/amd/display: disable stream if pixel clock changed with link active

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[Why]
Vbios uses preferred timing to turn on edp but OS could use other
timing.  If change pixel clock when link active, there is unexpected
garbage on monitor.

[How]
Once pixel clock changed, the driver needs to disable stream.

Signed-off-by: Chiawen Huang <chiawen.huang@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Chiawen Huang 2020-09-25 10:54:55 -04:00 • committed by Alex Deucher
parent d9beecfc79
commit 8353d30e74
1 changed files with 0 additions and 1 deletions
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drivers/gpu/drm/amd/display/dc/core/dc.c
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@ -864,7 +864,6 @@ static void disable_vbios_mode_if_required(
if (stream->link->local_sink && if (stream->link->local_sink &&
stream->link->local_sink->sink_signal == SIGNAL_TYPE_EDP) { stream->link->local_sink->sink_signal == SIGNAL_TYPE_EDP) {
link = stream->link; link = stream->link;
break;
} }
if (link != NULL) { if (link != NULL) {