linux-kernel - [PATCH] drm/amd/display: Drop XFCEnabled parameter from CalculatePrefetchSchedule

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Date:   Mon,  1 Aug 2022 09:40:06 -0300
From:   Maíra Canal <mairacanal@...eup.net>
To:     Harry Wentland <harry.wentland@....com>,
        Leo Li <sunpeng.li@....com>,
        Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
        Alex Deucher <alexander.deucher@....com>,
        christian.koenig@....com, Xinhui.Pan@....com,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     amd-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        mwen@...lia.com, andrealmeid@...eup.net,
        Isabella Basso <isabbasso@...eup.net>, magalilemes00@...il.com,
        tales.aparecida@...il.com,
        Maíra Canal <mairacanal@...eup.net>
Subject: [PATCH] drm/amd/display: Drop XFCEnabled parameter from CalculatePrefetchSchedule

The XFCEnabled parameter from the CalculatePrefetchSchedule function is
not used and is only mentioned in a couple of comments. Therefore,
remove the argument and the comments.

Signed-off-by: Maíra Canal <mairacanal@...eup.net>
---
 .../dc/dml/dcn21/display_mode_vba_21.c        | 21 +++----------------
 1 file changed, 3 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c b/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c
index 8a7485e21d53..05cbc6968cde 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c
@@ -120,7 +120,6 @@ static bool CalculatePrefetchSchedule(
 		unsigned int SwathHeightY,
 		unsigned int SwathHeightC,
 		double TWait,
-		bool XFCEnabled,
 		double XFCRemoteSurfaceFlipDelay,
 		bool ProgressiveToInterlaceUnitInOPP,
 		double *DSTXAfterScaler,
@@ -673,7 +672,6 @@ static bool CalculatePrefetchSchedule(
 		unsigned int SwathHeightY,
 		unsigned int SwathHeightC,
 		double TWait,
-		bool XFCEnabled,
 		double XFCRemoteSurfaceFlipDelay,
 		bool ProgressiveToInterlaceUnitInOPP,
 		double *DSTXAfterScaler,
@@ -910,12 +908,7 @@ static bool CalculatePrefetchSchedule(
 			TimeForFetchingMetaPTE = dml_max(*Tno_bw + (double) PDEAndMetaPTEBytesFrame * HostVMInefficiencyFactor / *PrefetchBandwidth,
 					dml_max(UrgentExtraLatency + UrgentLatency * (GPUVMPageTableLevels * (HostVMDynamicLevels + 1) - 1), LineTime / 4));
 		} else {
-// 5/30/2018 - This was an optimization requested from Sy but now NumberOfCursors is no longer a factor
-//             so if this needs to be reinstated, then it should be officially done in the VBA code as well.
-//			if (mode_lib->NumberOfCursors > 0 || XFCEnabled)
-				TimeForFetchingMetaPTE = LineTime / 4;
-//			else
-//				TimeForFetchingMetaPTE = 0.0;
+			TimeForFetchingMetaPTE = LineTime / 4;
 		}
 
 		if ((GPUVMEnable == true || DCCEnable == true)) {
@@ -931,11 +924,7 @@ static bool CalculatePrefetchSchedule(
 											LineTime
 													/ 4.0)));
 		} else {
-// See note above dated 5/30/2018
-//			if (NumberOfCursors > 0 || XFCEnabled)
-				TimeForFetchingRowInVBlank = (LineTime - TimeForFetchingMetaPTE) / 2.0;
-//			else // TODO: Did someone else add this??
-//				TimeForFetchingRowInVBlank = 0.0;
+			TimeForFetchingRowInVBlank = (LineTime - TimeForFetchingMetaPTE) / 2.0;
 		}
 
 		*DestinationLinesToRequestVMInVBlank = dml_ceil(4.0 * TimeForFetchingMetaPTE / LineTime, 1.0) / 4.0;
@@ -943,11 +932,9 @@ static bool CalculatePrefetchSchedule(
 		*DestinationLinesToRequestRowInVBlank = dml_ceil(4.0 * TimeForFetchingRowInVBlank / LineTime, 1.0) / 4.0;
 
 		LinesToRequestPrefetchPixelData = *DestinationLinesForPrefetch
-// See note above dated 5/30/2018
-//						- ((NumberOfCursors > 0 || GPUVMEnable || DCCEnable) ?
 						- ((GPUVMEnable || DCCEnable) ?
 								(*DestinationLinesToRequestVMInVBlank + 2 * *DestinationLinesToRequestRowInVBlank) :
-								0.0); // TODO: Did someone else add this??
+								0.0);
 
 		if (LinesToRequestPrefetchPixelData > 0) {
 
@@ -2200,7 +2187,6 @@ static void DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerforman
 							mode_lib->vba.SwathHeightY[k],
 							mode_lib->vba.SwathHeightC[k],
 							TWait,
-							mode_lib->vba.XFCEnabled[k],
 							mode_lib->vba.XFCRemoteSurfaceFlipDelay,
 							mode_lib->vba.ProgressiveToInterlaceUnitInOPP,
 							&locals->DSTXAfterScaler[k],
@@ -3493,7 +3479,6 @@ static noinline void CalculatePrefetchSchedulePerPlane(
 			locals->SwathHeightYThisState[k],
 			locals->SwathHeightCThisState[k],
 			mode_lib->vba.TWait,
-			mode_lib->vba.XFCEnabled[k],
 			mode_lib->vba.XFCRemoteSurfaceFlipDelay,
 			mode_lib->vba.ProgressiveToInterlaceUnitInOPP,
 			&locals->dst_x_after_scaler,
-- 
2.37.1