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

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[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: David Galiffi <David.Galiffi@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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David Galiffi 2020-06-11 17:36:14 -04:00 • committed by Alex Deucher

parent 0f782777f0

commit 8582aea20b

1 changed files with 4 additions and 0 deletions

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

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