From: David Galiffi <David.Galiffi@xxxxxxx> [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@xxxxxxx> Reviewed-by: Jun Lei <Jun.Lei@xxxxxxx> Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx> --- drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c index 3d0003c69373..1000dc6daf72 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c @@ -399,6 +399,10 @@ bool resource_are_streams_timing_synchronizable( != stream2->timing.v_addressable) return false; + if (stream1->timing.v_front_porch + != stream2->timing.v_front_porch) + return false; + if (stream1->timing.pix_clk_100hz != stream2->timing.pix_clk_100hz) return false; -- 2.27.0 _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
