Commit a861736d authored by Naveed Ashfaq's avatar Naveed Ashfaq Committed by Alex Deucher
Browse files

drm/amd/display: Fixed Intermittent blue screen on OLED panel 



[why]
Changing to smaller modes on OLED panel caused a blue screen crash
as driver reported dram change during vactive when it shouldn't

[how]
Added an extra condition to prevent incorrect dram change timing

Signed-off-by: default avatarNaveed Ashfaq <Naveed.Ashfaq@amd.com>
Acked-by: default avatarAurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 14ae6902

drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20v2.c

+5 −6
Original line number Diff line number Diff line
@@ -2635,16 +2635,15 @@ static void dml20v2_DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndP 
	}



	if (mode_lib->vba.DRAMClockChangeSupportsVActive &&

			mode_lib->vba.MinActiveDRAMClockChangeMargin > 60) {

			mode_lib->vba.MinActiveDRAMClockChangeMargin > 60 &&

			mode_lib->vba.PrefetchMode[mode_lib->vba.VoltageLevel][mode_lib->vba.maxMpcComb] == 0) {

		mode_lib->vba.DRAMClockChangeWatermark += 25;



		for (k = 0; k < mode_lib->vba.NumberOfActivePlanes; ++k) {

			if (mode_lib->vba.PrefetchMode[mode_lib->vba.VoltageLevel][mode_lib->vba.maxMpcComb] == 0) {

			if (mode_lib->vba.DRAMClockChangeWatermark >

			dml_max(mode_lib->vba.StutterEnterPlusExitWatermark, mode_lib->vba.UrgentWatermark))

				mode_lib->vba.MinTTUVBlank[k] += 25;

		}

		}



		mode_lib->vba.DRAMClockChangeSupport[0][0] = dm_dram_clock_change_vactive;

	} else if (mode_lib->vba.DummyPStateCheck &&