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[why] When clip size is changed recout and viewport size would require an update. When the update is clip size only current driver fails to program the update into hardware. [how] Set a new clip_size_change flag when it is detected and set MED update type and reprogram scaling params in next program pipe. Reviewed-by: Aric Cyr <aric.cyr@amd.com> Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com> Signed-off-by: Wenjing Liu <wenjing.liu@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>