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.pil...@amd.com>
Cc: Alex Deucher <alexander.deuc...@amd.com>
Cc: Harry Wentland <harry.wentl...@amd.com>
Cc: Naveed Ashfaq <naveed.ash...@amd.com>
Cc: Hersen Wu <hersenxs...@amd.com>
Cc: Roman Li <roman...@amd.com>
Signed-off-by: Rodrigo Siqueira <rodrigo.sique...@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
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