Commit 8582aea2 authored by David Galiffi's avatar David Galiffi Committed by Alex Deucher

drm/amd/display: Compare v_front_porch when checking if streams are synchronizable

[Why]
If the front porch of the two timings differ, then there may not be
enough time while both streams are in vertical blank to perform a memory
clock change. This can hang the system.

[How]
Check the each streams timing.v_front_porch when determining if the two
streams are synchronizable.
Signed-off-by: default avatarDavid Galiffi <David.Galiffi@amd.com>
Reviewed-by: default avatarJun Lei <Jun.Lei@amd.com>
Acked-by: default avatarRodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 0f782777
...@@ -399,6 +399,10 @@ bool resource_are_streams_timing_synchronizable( ...@@ -399,6 +399,10 @@ bool resource_are_streams_timing_synchronizable(
!= stream2->timing.v_addressable) != stream2->timing.v_addressable)
return false; return false;
if (stream1->timing.v_front_porch
!= stream2->timing.v_front_porch)
return false;
if (stream1->timing.pix_clk_100hz if (stream1->timing.pix_clk_100hz
!= stream2->timing.pix_clk_100hz) != stream2->timing.pix_clk_100hz)
return false; return false;
......
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