drm/amd/display: Ensure that dmcub support flag is set for DCN20

In the DCN20 resource initialization, ensure that DMCUB support starts
configured as true.

Signed-off-by: Rodrigo Siqueira <[email protected]>
Acked-by: Aurabindo Pillai <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: Rodrigo Siqueira

drivers/gpu/drm/amd/display/dc/resource/dcn20/dcn20_resource.c

@@ -2449,6 +2449,7 @@ static bool dcn20_resource_construct(
 	dc->caps.post_blend_color_processing = true;
 	dc->caps.force_dp_tps4_for_cp2520 = true;
 	dc->caps.extended_aux_timeout_support = true;
+	dc->caps.dmcub_support = true;
 
 	/* Color pipeline capabilities */
 	dc->caps.color.dpp.dcn_arch = 1;