[PATCH 05/22] drm/amd/display: Fix prefetch vratio check

[Qingqing Zhuo]

From: Alvin Lee <Alvin.Lee2 at amd.com>

[Why & How]
- For prefetch max vratio check, use the calculated
  prefetch bandwidth from dml32_CalculatePrefetchSchedule
  instead of max prefetch bandwidth
- Also multiply prefetch bandwidth by VRatio since scaling
  is not considered one calculating require prefetch bw

Reviewed-by: Jun Lei <Jun.Lei at amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo at amd.com>
Signed-off-by: Alvin Lee <Alvin.Lee2 at amd.com>
---
 .../dc/dml/dcn32/display_mode_vba_32.c        |  9 ++++++++
 .../dc/dml/dcn32/display_mode_vba_util_32.c   | 21 ++++++++++++++-----
 .../dc/dml/dcn32/display_mode_vba_util_32.h   |  5 ++++-
 3 files changed, 29 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
index 55567b9fcfc8..7a99a6656676 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
@@ -942,6 +942,9 @@ static void DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerforman
 					v->UrgBurstFactorLumaPre,
 					v->UrgBurstFactorChromaPre,
 					v->UrgBurstFactorCursorPre,
+					v->PrefetchBandwidth,
+					v->VRatio,
+					v->MaxVRatioPre,
 
 					/* output */
 					&MaxTotalRDBandwidth,
@@ -972,6 +975,9 @@ static void DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerforman
 					v->dummy_vars.DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerformanceCalculation.dummy_unit_vector,
 					v->dummy_vars.DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerformanceCalculation.dummy_unit_vector,
 					v->dummy_vars.DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerformanceCalculation.dummy_unit_vector,
+					v->PrefetchBandwidth,
+					v->VRatio,
+					v->MaxVRatioPre,
 
 					/* output */
 					&v->dummy_vars.DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerformanceCalculation.dummy_single[0],
@@ -3373,6 +3379,9 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
 							mode_lib->vba.UrgentBurstFactorLumaPre,
 							mode_lib->vba.UrgentBurstFactorChromaPre,
 							mode_lib->vba.UrgentBurstFactorCursorPre,
+							v->PrefetchBW,
+							v->VRatio,
+							v->MaxVRatioPre,
 
 							/* output */
 							&v->dummy_vars.dml32_ModeSupportAndSystemConfigurationFull.dummy_single[0],   // Single  *PrefetchBandwidth
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 069e9abb83cb..d1000aa4c481 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
@@ -6143,9 +6143,12 @@ void dml32_CalculatePrefetchBandwithSupport(unsigned int NumberOfActiveSurfaces,
 		double UrgentBurstFactorLumaPre[],
 		double UrgentBurstFactorChromaPre[],
 		double UrgentBurstFactorCursorPre[],
+		double PrefetchBW[],
+		double VRatio[],
+		double MaxVRatioPre,
 
 		/* output */
-		double  *PrefetchBandwidth,
+		double  *MaxPrefetchBandwidth,
 		double  *FractionOfUrgentBandwidth,
 		bool *PrefetchBandwidthSupport)
 {
@@ -6153,25 +6156,33 @@ void dml32_CalculatePrefetchBandwithSupport(unsigned int NumberOfActiveSurfaces,
 	double ActiveBandwidthPerSurface;
 	bool NotEnoughUrgentLatencyHiding = false;
 	double TotalActiveBandwidth = 0;
+	double TotalPrefetchBandwidth = 0;
+
 	for (k = 0; k < NumberOfActiveSurfaces; ++k) {
 		if (NotUrgentLatencyHiding[k]) {
 			NotEnoughUrgentLatencyHiding = true;
 		}
 	}
 
-	*PrefetchBandwidth = 0;
+	*MaxPrefetchBandwidth = 0;
 	for (k = 0; k < NumberOfActiveSurfaces; ++k) {
 		ActiveBandwidthPerSurface = ReadBandwidthLuma[k] * UrgentBurstFactorLuma[k] + ReadBandwidthChroma[k] * UrgentBurstFactorChroma[k] + cursor_bw[k] * UrgentBurstFactorCursor[k] + NumberOfDPP[k] * (meta_row_bandwidth[k] + dpte_row_bandwidth[k]);
 
 		TotalActiveBandwidth += ActiveBandwidthPerSurface;
 
-		*PrefetchBandwidth = *PrefetchBandwidth + dml_max3(NumberOfDPP[k] * prefetch_vmrow_bw[k],
+		TotalPrefetchBandwidth = TotalPrefetchBandwidth + PrefetchBW[k] * VRatio[k];
+
+		*MaxPrefetchBandwidth = *MaxPrefetchBandwidth + dml_max3(NumberOfDPP[k] * prefetch_vmrow_bw[k],
 				ActiveBandwidthPerSurface,
 				NumberOfDPP[k] * (PrefetchBandwidthLuma[k] * UrgentBurstFactorLumaPre[k] + PrefetchBandwidthChroma[k] * UrgentBurstFactorChromaPre[k]) + cursor_bw_pre[k] * UrgentBurstFactorCursorPre[k]);
 	}
 
-	*PrefetchBandwidthSupport = (*PrefetchBandwidth <= ReturnBW) &&  (*PrefetchBandwidth <= TotalActiveBandwidth * __DML_MAX_BW_RATIO_PRE__) && !NotEnoughUrgentLatencyHiding;
-	*FractionOfUrgentBandwidth = *PrefetchBandwidth / ReturnBW;
+	if (MaxVRatioPre == __DML_MAX_VRATIO_PRE__)
+		*PrefetchBandwidthSupport = (*MaxPrefetchBandwidth <= ReturnBW) && (TotalPrefetchBandwidth <= TotalActiveBandwidth * __DML_MAX_BW_RATIO_PRE__) && !NotEnoughUrgentLatencyHiding;
+	else
+		*PrefetchBandwidthSupport = (*MaxPrefetchBandwidth <= ReturnBW) && !NotEnoughUrgentLatencyHiding;
+
+	*FractionOfUrgentBandwidth = *MaxPrefetchBandwidth / ReturnBW;
 }
 
 double dml32_CalculateBandwidthAvailableForImmediateFlip(unsigned int NumberOfActiveSurfaces,
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.h b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.h
index d41c4d8b0c7a..9ba792c633a5 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.h
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.h
@@ -1096,9 +1096,12 @@ void dml32_CalculatePrefetchBandwithSupport(unsigned int NumberOfActiveSurfaces,
 		double UrgentBurstFactorLumaPre[],
 		double UrgentBurstFactorChromaPre[],
 		double UrgentBurstFactorCursorPre[],
+		double PrefetchBW[],
+		double VRatio[],
+		double MaxVRatioPre,
 
 		/* output */
-		double  *PrefetchBandwidth,
+		double  *MaxPrefetchBandwidth,
 		double  *FractionOfUrgentBandwidth,
 		bool *PrefetchBandwidthSupport);
 
-- 
2.25.1