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From 5f7f2f8aea196df5274a3bf3a7ff96d119be54d7 Mon Sep 17 00:00:00 2001
From: Joshua Aberback <joshua.aberback@amd.com>
Date: Fri, 1 Nov 2019 17:29:20 -0400
Subject: [PATCH 4489/4736] drm/amd/display: Adjust DML workaround threshold
[Why]
There is a case where the margin is between 50 and 60, but applying the
workaround causes a hang. By increasing the threshold, we are blocking more
cases from switching p-state during active, but those cases will fall back
to switching during blank, which is fine.
[How]
- increase required margin from 50 to 60
Signed-off-by: Joshua Aberback <joshua.aberback@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
---
drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20.c | 2 +-
.../gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20v2.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20.c b/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20.c
index 77b7574c63cb..3b224b155e8c 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20.c
@@ -2578,7 +2578,7 @@ static void dml20_DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPer
+ mode_lib->vba.DRAMClockChangeLatency;
if (mode_lib->vba.DRAMClockChangeSupportsVActive &&
- mode_lib->vba.MinActiveDRAMClockChangeMargin > 50) {
+ mode_lib->vba.MinActiveDRAMClockChangeMargin > 60) {
mode_lib->vba.DRAMClockChangeWatermark += 25;
mode_lib->vba.DRAMClockChangeSupport[0][0] = dm_dram_clock_change_vactive;
} else {
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 62dfd36d830a..6482d7b99bae 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
@@ -2612,7 +2612,7 @@ static void dml20v2_DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndP
+ mode_lib->vba.DRAMClockChangeLatency;
if (mode_lib->vba.DRAMClockChangeSupportsVActive &&
- mode_lib->vba.MinActiveDRAMClockChangeMargin > 50) {
+ mode_lib->vba.MinActiveDRAMClockChangeMargin > 60) {
mode_lib->vba.DRAMClockChangeWatermark += 25;
mode_lib->vba.DRAMClockChangeSupport[0][0] = dm_dram_clock_change_vactive;
} else if (mode_lib->vba.DummyPStateCheck &&
--
2.17.1
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