[PATCH 51/66] drm/amd/display: Add check for PState change in DCN32

[Qingqing Zhuo]

From: Aurabindo Pillai <aurabindo.pillai at amd.com>

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 at amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai at 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 d39e77d95fc3..a50e7f4dce42 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;
-- 
2.34.1