Commit 026a71ba authored by Leo Chen's avatar Leo Chen Committed by Alex Deucher
Browse files

drm/amd/display: Blocking invalid 420 modes on HDMI TMDS for DCN31 



[Why & How]
HDMI TMDS does not have ODM support. Filtering 420 modes that
exceed the 4096 FMT limitation on DCN31 will resolve
intermittent corruptions issues.

Reviewed-by: default avatarNicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: default avatarTom Chung <chiahsuan.chung@amd.com>
Signed-off-by: default avatarLeo Chen <sancchen@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 1155150d

drivers/gpu/drm/amd/display/dc/dml/dcn31/display_mode_vba_31.c

+3 −1
Original line number Original line Diff line number Diff line
@@ -4135,7 +4135,9 @@ void dml31_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l 
				}

				}

				if (v->OutputFormat[k] == dm_420 && v->HActive[k] > DCN31_MAX_FMT_420_BUFFER_WIDTH

				if (v->OutputFormat[k] == dm_420 && v->HActive[k] > DCN31_MAX_FMT_420_BUFFER_WIDTH

						&& v->ODMCombineEnablePerState[i][k] != dm_odm_combine_mode_4to1) {

						&& v->ODMCombineEnablePerState[i][k] != dm_odm_combine_mode_4to1) {

					if (v->HActive[k] / 2 > DCN31_MAX_FMT_420_BUFFER_WIDTH) {

					if (v->Output[k] == dm_hdmi) {

						FMTBufferExceeded = true;

					} else if (v->HActive[k] / 2 > DCN31_MAX_FMT_420_BUFFER_WIDTH) {

						v->ODMCombineEnablePerState[i][k] = dm_odm_combine_mode_4to1;

						v->ODMCombineEnablePerState[i][k] = dm_odm_combine_mode_4to1;

						v->PlaneRequiredDISPCLK = v->PlaneRequiredDISPCLKWithODMCombine4To1;

						v->PlaneRequiredDISPCLK = v->PlaneRequiredDISPCLKWithODMCombine4To1;