[PATCH] Revert "drm/amd/display: Fixed Intermittent blue screen on OLED panel"

[Rodrigo Siqueira]

The patch

commit a861736dae64 ("drm/amd/display: Fixed Intermittent blue screen on OLED panel")

causes power regression for many users. It seems that this change causes
the MCLK to get forced high; this creates a regression for many users
since their devices were not able to drop to a low state after this
change. For this reason, this reverts commit
a861736dae644a0d7abbca0c638ae6aad28feeb8.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1407
Cc: Aurabindo Pillai <aurabindo.pillai at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Cc: Harry Wentland <harry.wentland at amd.com>
Cc: Naveed Ashfaq <Naveed.Ashfaq at amd.com>
Cc: Hersen Wu <hersenxs.wu at amd.com>
Cc: Roman Li <roman.li at amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira at amd.com>
---
 .../amd/display/dc/dml/dcn20/display_mode_vba_20v2.c  | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20v2.c b/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20v2.c
index 860e72a51534..80170f9721ce 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20v2.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20v2.c
@@ -2635,14 +2635,15 @@ static void dml20v2_DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndP
 	}
 
 	if (mode_lib->vba.DRAMClockChangeSupportsVActive &&
-			mode_lib->vba.MinActiveDRAMClockChangeMargin > 60 &&
-			mode_lib->vba.PrefetchMode[mode_lib->vba.VoltageLevel][mode_lib->vba.maxMpcComb] == 0) {
+			mode_lib->vba.MinActiveDRAMClockChangeMargin > 60) {
 		mode_lib->vba.DRAMClockChangeWatermark += 25;
 
 		for (k = 0; k < mode_lib->vba.NumberOfActivePlanes; ++k) {
-			if (mode_lib->vba.DRAMClockChangeWatermark >
-			dml_max(mode_lib->vba.StutterEnterPlusExitWatermark, mode_lib->vba.UrgentWatermark))
-				mode_lib->vba.MinTTUVBlank[k] += 25;
+			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;
-- 
2.25.1