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

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[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: Naveed Ashfaq <Naveed.Ashfaq@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Naveed Ashfaq 2020-08-14 13:48:13 -04:00 committed by Alex Deucher
parent 14ae69026f
commit a861736dae
1 changed files with 5 additions and 6 deletions
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11
drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20v2.c
View File

@ -2635,15 +2635,14 @@ 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;
}
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;