From d878ff8f41e21c2e57d6385eb1184cea97f1050b Mon Sep 17 00:00:00 2001
From: Aurabindo Pillai <aurabindo.pillai@amd.com>
Date: Thu, 6 Apr 2023 16:19:16 -0400
Subject: [PATCH] drm/amd/display: Add check for PState change in DCN32
For pstate change, allow DML to loop through
all possible prefetch combinations so as to
support more display configurations. Set the max
and min prefetch modes to enable the sequence.
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
---
.../drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c
index d39e77d95fc30..a50e7f4dce421 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c
@@ -4656,6 +4656,10 @@ void dml32_CalculateMinAndMaxPrefetchMode(
} else if (AllowForPStateChangeOrStutterInVBlankFinal == dm_prefetch_support_uclk_fclk_and_stutter) {
*MinPrefetchMode = 0;
*MaxPrefetchMode = 0;
+ } else if (AllowForPStateChangeOrStutterInVBlankFinal ==
+ dm_prefetch_support_uclk_fclk_and_stutter_if_possible) {
+ *MinPrefetchMode = 0;
+ *MaxPrefetchMode = 3;
} else {
*MinPrefetchMode = 0;
*MaxPrefetchMode = 3;
--
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