drm/amd/display: Reduce stack size for dml21_ModeSupportAndSystemConfigurationFull

[Why & How]
With Werror enabled in the kernel we were failing the clang build since
dml21_ModeSupportAndSystemConfigurationFull's stack frame is 1064 when
building with clang, and exceeding the default 1024 stack frame limit.

The culprit seems to be the Pipe struct, so pull the relevant block
out into its own sub-function.

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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 4136eb8..8a7485e 100644 (file)
--- 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
@@ -3394,6 +3394,127 @@ static unsigned int TruncToValidBPP(
        }
 }
 
+
+static noinline void CalculatePrefetchSchedulePerPlane(
+               struct display_mode_lib *mode_lib,
+               int i,
+               unsigned j,
+               unsigned k)
+{
+       struct vba_vars_st *locals = &mode_lib->vba;
+       Pipe myPipe;
+       HostVM myHostVM;
+
+       if (mode_lib->vba.XFCEnabled[k] == true) {
+               mode_lib->vba.XFCRemoteSurfaceFlipDelay =
+                               CalculateRemoteSurfaceFlipDelay(
+                                               mode_lib,
+                                               mode_lib->vba.VRatio[k],
+                                               locals->SwathWidthYThisState[k],
+                                               dml_ceil(locals->BytePerPixelInDETY[k], 1.0),
+                                               mode_lib->vba.HTotal[k] / mode_lib->vba.PixelClock[k],
+                                               mode_lib->vba.XFCTSlvVupdateOffset,
+                                               mode_lib->vba.XFCTSlvVupdateWidth,
+                                               mode_lib->vba.XFCTSlvVreadyOffset,
+                                               mode_lib->vba.XFCXBUFLatencyTolerance,
+                                               mode_lib->vba.XFCFillBWOverhead,
+                                               mode_lib->vba.XFCSlvChunkSize,
+                                               mode_lib->vba.XFCBusTransportTime,
+                                               mode_lib->vba.TimeCalc,
+                                               mode_lib->vba.TWait,
+                                               &mode_lib->vba.SrcActiveDrainRate,
+                                               &mode_lib->vba.TInitXFill,
+                                               &mode_lib->vba.TslvChk);
+       } else {
+               mode_lib->vba.XFCRemoteSurfaceFlipDelay = 0.0;
+       }
+
+       myPipe.DPPCLK = locals->RequiredDPPCLK[i][j][k];
+       myPipe.DISPCLK = locals->RequiredDISPCLK[i][j];
+       myPipe.PixelClock = mode_lib->vba.PixelClock[k];
+       myPipe.DCFCLKDeepSleep = mode_lib->vba.ProjectedDCFCLKDeepSleep[0][0];
+       myPipe.DPPPerPlane = locals->NoOfDPP[i][j][k];
+       myPipe.ScalerEnabled = mode_lib->vba.ScalerEnabled[k];
+       myPipe.SourceScan = mode_lib->vba.SourceScan[k];
+       myPipe.BlockWidth256BytesY = locals->Read256BlockWidthY[k];
+       myPipe.BlockHeight256BytesY = locals->Read256BlockHeightY[k];
+       myPipe.BlockWidth256BytesC = locals->Read256BlockWidthC[k];
+       myPipe.BlockHeight256BytesC = locals->Read256BlockHeightC[k];
+       myPipe.InterlaceEnable = mode_lib->vba.Interlace[k];
+       myPipe.NumberOfCursors = mode_lib->vba.NumberOfCursors[k];
+       myPipe.VBlank = mode_lib->vba.VTotal[k] - mode_lib->vba.VActive[k];
+       myPipe.HTotal = mode_lib->vba.HTotal[k];
+
+
+       myHostVM.Enable = mode_lib->vba.HostVMEnable;
+       myHostVM.MaxPageTableLevels = mode_lib->vba.HostVMMaxPageTableLevels;
+       myHostVM.CachedPageTableLevels = mode_lib->vba.HostVMCachedPageTableLevels;
+
+
+       mode_lib->vba.IsErrorResult[i][j][k] = CalculatePrefetchSchedule(
+                       mode_lib,
+                       mode_lib->vba.PercentOfIdealDRAMFabricAndSDPPortBWReceivedAfterUrgLatencyPixelMixedWithVMData,
+                       mode_lib->vba.PercentOfIdealDRAMFabricAndSDPPortBWReceivedAfterUrgLatencyVMDataOnly,
+                       &myPipe,
+                       locals->DSCDelayPerState[i][k],
+                       mode_lib->vba.DPPCLKDelaySubtotal,
+                       mode_lib->vba.DPPCLKDelaySCL,
+                       mode_lib->vba.DPPCLKDelaySCLLBOnly,
+                       mode_lib->vba.DPPCLKDelayCNVCFormater,
+                       mode_lib->vba.DPPCLKDelayCNVCCursor,
+                       mode_lib->vba.DISPCLKDelaySubtotal,
+                       locals->SwathWidthYThisState[k] / mode_lib->vba.HRatio[k],
+                       mode_lib->vba.OutputFormat[k],
+                       mode_lib->vba.MaxInterDCNTileRepeaters,
+                       dml_min(mode_lib->vba.MaxVStartup, locals->MaximumVStartup[0][0][k]),
+                       locals->MaximumVStartup[0][0][k],
+                       mode_lib->vba.GPUVMMaxPageTableLevels,
+                       mode_lib->vba.GPUVMEnable,
+                       &myHostVM,
+                       mode_lib->vba.DynamicMetadataEnable[k],
+                       mode_lib->vba.DynamicMetadataLinesBeforeActiveRequired[k],
+                       mode_lib->vba.DynamicMetadataTransmittedBytes[k],
+                       mode_lib->vba.DCCEnable[k],
+                       mode_lib->vba.UrgentLatency,
+                       mode_lib->vba.ExtraLatency,
+                       mode_lib->vba.TimeCalc,
+                       locals->PDEAndMetaPTEBytesPerFrame[0][0][k],
+                       locals->MetaRowBytes[0][0][k],
+                       locals->DPTEBytesPerRow[0][0][k],
+                       locals->PrefetchLinesY[0][0][k],
+                       locals->SwathWidthYThisState[k],
+                       locals->BytePerPixelInDETY[k],
+                       locals->PrefillY[k],
+                       locals->MaxNumSwY[k],
+                       locals->PrefetchLinesC[0][0][k],
+                       locals->BytePerPixelInDETC[k],
+                       locals->PrefillC[k],
+                       locals->MaxNumSwC[k],
+                       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,
+                       &locals->dst_y_after_scaler,
+                       &locals->LineTimesForPrefetch[k],
+                       &locals->PrefetchBW[k],
+                       &locals->LinesForMetaPTE[k],
+                       &locals->LinesForMetaAndDPTERow[k],
+                       &locals->VRatioPreY[i][j][k],
+                       &locals->VRatioPreC[i][j][k],
+                       &locals->RequiredPrefetchPixelDataBWLuma[i][j][k],
+                       &locals->RequiredPrefetchPixelDataBWChroma[i][j][k],
+                       &locals->VStartupRequiredWhenNotEnoughTimeForDynamicMetadata,
+                       &locals->Tno_bw[k],
+                       &locals->prefetch_vmrow_bw[k],
+                       locals->swath_width_luma_ub,
+                       locals->swath_width_chroma_ub,
+                       &mode_lib->vba.VUpdateOffsetPix[k],
+                       &mode_lib->vba.VUpdateWidthPix[k],
+                       &mode_lib->vba.VReadyOffsetPix[k]);
+}
 void dml21_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_lib)
 {
        struct vba_vars_st *locals = &mode_lib->vba;
@@ -4676,120 +4797,9 @@ void dml21_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
                                                mode_lib->vba.DRAMClockChangeLatency,
                                                mode_lib->vba.UrgentLatency,
                                                mode_lib->vba.SREnterPlusExitTime);
-                               for (k = 0; k <= mode_lib->vba.NumberOfActivePlanes - 1; k++) {
-                                       Pipe myPipe;
-                                       HostVM myHostVM;
-
-                                       if (mode_lib->vba.XFCEnabled[k] == true) {
-                                               mode_lib->vba.XFCRemoteSurfaceFlipDelay =
-                                                               CalculateRemoteSurfaceFlipDelay(
-                                                                               mode_lib,
-                                                                               mode_lib->vba.VRatio[k],
-                                                                               locals->SwathWidthYThisState[k],
-                                                                               dml_ceil(locals->BytePerPixelInDETY[k], 1.0),
-                                                                               mode_lib->vba.HTotal[k] / mode_lib->vba.PixelClock[k],
-                                                                               mode_lib->vba.XFCTSlvVupdateOffset,
-                                                                               mode_lib->vba.XFCTSlvVupdateWidth,
-                                                                               mode_lib->vba.XFCTSlvVreadyOffset,
-                                                                               mode_lib->vba.XFCXBUFLatencyTolerance,
-                                                                               mode_lib->vba.XFCFillBWOverhead,
-                                                                               mode_lib->vba.XFCSlvChunkSize,
-                                                                               mode_lib->vba.XFCBusTransportTime,
-                                                                               mode_lib->vba.TimeCalc,
-                                                                               mode_lib->vba.TWait,
-                                                                               &mode_lib->vba.SrcActiveDrainRate,
-                                                                               &mode_lib->vba.TInitXFill,
-                                                                               &mode_lib->vba.TslvChk);
-                                       } else {
-                                               mode_lib->vba.XFCRemoteSurfaceFlipDelay = 0.0;
-                                       }
+                               for (k = 0; k <= mode_lib->vba.NumberOfActivePlanes - 1; k++)
+                                       CalculatePrefetchSchedulePerPlane(mode_lib, i, j, k);
 
-                                       myPipe.DPPCLK = locals->RequiredDPPCLK[i][j][k];
-                                       myPipe.DISPCLK = locals->RequiredDISPCLK[i][j];
-                                       myPipe.PixelClock = mode_lib->vba.PixelClock[k];
-                                       myPipe.DCFCLKDeepSleep = mode_lib->vba.ProjectedDCFCLKDeepSleep[0][0];
-                                       myPipe.DPPPerPlane = locals->NoOfDPP[i][j][k];
-                                       myPipe.ScalerEnabled = mode_lib->vba.ScalerEnabled[k];
-                                       myPipe.SourceScan = mode_lib->vba.SourceScan[k];
-                                       myPipe.BlockWidth256BytesY = locals->Read256BlockWidthY[k];
-                                       myPipe.BlockHeight256BytesY = locals->Read256BlockHeightY[k];
-                                       myPipe.BlockWidth256BytesC = locals->Read256BlockWidthC[k];
-                                       myPipe.BlockHeight256BytesC = locals->Read256BlockHeightC[k];
-                                       myPipe.InterlaceEnable = mode_lib->vba.Interlace[k];
-                                       myPipe.NumberOfCursors = mode_lib->vba.NumberOfCursors[k];
-                                       myPipe.VBlank = mode_lib->vba.VTotal[k] - mode_lib->vba.VActive[k];
-                                       myPipe.HTotal = mode_lib->vba.HTotal[k];
-
-
-                                       myHostVM.Enable = mode_lib->vba.HostVMEnable;
-                                       myHostVM.MaxPageTableLevels = mode_lib->vba.HostVMMaxPageTableLevels;
-                                       myHostVM.CachedPageTableLevels = mode_lib->vba.HostVMCachedPageTableLevels;
-
-
-                                       mode_lib->vba.IsErrorResult[i][j][k] = CalculatePrefetchSchedule(
-                                                       mode_lib,
-                                                       mode_lib->vba.PercentOfIdealDRAMFabricAndSDPPortBWReceivedAfterUrgLatencyPixelMixedWithVMData,
-                                                       mode_lib->vba.PercentOfIdealDRAMFabricAndSDPPortBWReceivedAfterUrgLatencyVMDataOnly,
-                                                       &myPipe,
-                                                       locals->DSCDelayPerState[i][k],
-                                                       mode_lib->vba.DPPCLKDelaySubtotal,
-                                                       mode_lib->vba.DPPCLKDelaySCL,
-                                                       mode_lib->vba.DPPCLKDelaySCLLBOnly,
-                                                       mode_lib->vba.DPPCLKDelayCNVCFormater,
-                                                       mode_lib->vba.DPPCLKDelayCNVCCursor,
-                                                       mode_lib->vba.DISPCLKDelaySubtotal,
-                                                       locals->SwathWidthYThisState[k] / mode_lib->vba.HRatio[k],
-                                                       mode_lib->vba.OutputFormat[k],
-                                                       mode_lib->vba.MaxInterDCNTileRepeaters,
-                                                       dml_min(mode_lib->vba.MaxVStartup, locals->MaximumVStartup[0][0][k]),
-                                                       locals->MaximumVStartup[0][0][k],
-                                                       mode_lib->vba.GPUVMMaxPageTableLevels,
-                                                       mode_lib->vba.GPUVMEnable,
-                                                       &myHostVM,
-                                                       mode_lib->vba.DynamicMetadataEnable[k],
-                                                       mode_lib->vba.DynamicMetadataLinesBeforeActiveRequired[k],
-                                                       mode_lib->vba.DynamicMetadataTransmittedBytes[k],
-                                                       mode_lib->vba.DCCEnable[k],
-                                                       mode_lib->vba.UrgentLatency,
-                                                       mode_lib->vba.ExtraLatency,
-                                                       mode_lib->vba.TimeCalc,
-                                                       locals->PDEAndMetaPTEBytesPerFrame[0][0][k],
-                                                       locals->MetaRowBytes[0][0][k],
-                                                       locals->DPTEBytesPerRow[0][0][k],
-                                                       locals->PrefetchLinesY[0][0][k],
-                                                       locals->SwathWidthYThisState[k],
-                                                       locals->BytePerPixelInDETY[k],
-                                                       locals->PrefillY[k],
-                                                       locals->MaxNumSwY[k],
-                                                       locals->PrefetchLinesC[0][0][k],
-                                                       locals->BytePerPixelInDETC[k],
-                                                       locals->PrefillC[k],
-                                                       locals->MaxNumSwC[k],
-                                                       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,
-                                                       &locals->dst_y_after_scaler,
-                                                       &locals->LineTimesForPrefetch[k],
-                                                       &locals->PrefetchBW[k],
-                                                       &locals->LinesForMetaPTE[k],
-                                                       &locals->LinesForMetaAndDPTERow[k],
-                                                       &locals->VRatioPreY[i][j][k],
-                                                       &locals->VRatioPreC[i][j][k],
-                                                       &locals->RequiredPrefetchPixelDataBWLuma[i][j][k],
-                                                       &locals->RequiredPrefetchPixelDataBWChroma[i][j][k],
-                                                       &locals->VStartupRequiredWhenNotEnoughTimeForDynamicMetadata,
-                                                       &locals->Tno_bw[k],
-                                                       &locals->prefetch_vmrow_bw[k],
-                                                       locals->swath_width_luma_ub,
-                                                       locals->swath_width_chroma_ub,
-                                                       &mode_lib->vba.VUpdateOffsetPix[k],
-                                                       &mode_lib->vba.VUpdateWidthPix[k],
-                                                       &mode_lib->vba.VReadyOffsetPix[k]);
-                               }
                                mode_lib->vba.MaximumReadBandwidthWithoutPrefetch = 0.0;
                                mode_lib->vba.MaximumReadBandwidthWithPrefetch = 0.0;
                                for (k = 0; k <= mode_lib->vba.NumberOfActivePlanes - 1; k++) {