[SRU][N][PATCH 1/1] drm/amd/display: update DML2 policy EnhancedPrefetchScheduleAccelerationFinal DCN35

[Tim Whisonant]

From: Yihan Zhu <Yihan.Zhu at amd.com>

[WHY & HOW]
Mismatch in DCN35 DML2 cause bw validation failed to acquire unexpected DPP pipe to cause
grey screen and system hang. Remove EnhancedPrefetchScheduleAccelerationFinal value override
to match HW spec.

Cc: Mario Limonciello <mario.limonciello at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Reviewed-by: Charlene Liu <charlene.liu at amd.com>
Signed-off-by: Yihan Zhu <Yihan.Zhu at amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai at amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
(cherry picked from commit 9dad21f910fcea2bdcff4af46159101d7f9cd8ba)
Cc: stable at vger.kernel.org
(cherry picked from commit 0d5e5e8a0aa49ea2163abf128da3b509a6c58286)
CVE-2024-50004
Signed-off-by: Tim Whisonant <tim.whisonant at canonical.com>
---
 drivers/gpu/drm/amd/display/dc/dml2/dml2_policy.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dml2/dml2_policy.c b/drivers/gpu/drm/amd/display/dc/dml2/dml2_policy.c
index c4c52173ef224..11c904ae29586 100644
--- a/drivers/gpu/drm/amd/display/dc/dml2/dml2_policy.c
+++ b/drivers/gpu/drm/amd/display/dc/dml2/dml2_policy.c
@@ -303,7 +303,6 @@ void build_unoptimized_policy_settings(enum dml_project_id project, struct dml_m
 	if (project == dml_project_dcn35 ||
 		project == dml_project_dcn351) {
 		policy->DCCProgrammingAssumesScanDirectionUnknownFinal = false;
-		policy->EnhancedPrefetchScheduleAccelerationFinal = 0;
 		policy->AllowForPStateChangeOrStutterInVBlankFinal = dml_prefetch_support_uclk_fclk_and_stutter_if_possible; /*new*/
 		policy->UseOnlyMaxPrefetchModes = 1;
 	}
-- 
2.43.0