From: Harry Wentland <harry.wentland@amd.com>
To: <amd-gfx@lists.freedesktop.org>
Cc: <ndesaulniers@google.com>, <torvalds@linux-foundation.org>,
<linux-kernel@vger.kernel.org>, <arnd@kernel.org>,
<sunpeng.li@amd.com>, <alexander.deucher@amd.com>,
<christian.koenig@amd.com>, <Xinhui.Pan@amd.com>,
<nathan@kernel.org>, <linux@roeck-us.net>, <llvm@lists.linux.dev>,
Harry Wentland <harry.wentland@amd.com>
Subject: [PATCH] drm/amd/display: Reduce stack size for dml21_ModeSupportAndSystemConfigurationFull
Date: Tue, 14 Sep 2021 17:05:08 -0400 [thread overview]
Message-ID: <20210914210508.10627-1-harry.wentland@amd.com> (raw)
[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>
Fixes: 3fe617ccafd6 ("Enable '-Werror' by default for all kernel builds")
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: amd-gfx@lists.freedesktop.org
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Cc: Arnd Bergmann <arnd@kernel.org>
Cc: Leo Li <sunpeng.li@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Xinhui Pan <Xinhui.Pan@amd.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: llvm@lists.linux.dev
---
.../dc/dml/dcn21/display_mode_vba_21.c | 236 +++++++++---------
1 file changed, 123 insertions(+), 113 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 4136eb8256cb..8a7485e21d53 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
@@ -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++) {
--
2.33.0
next reply other threads:[~2021-09-14 21:05 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-14 21:05 Harry Wentland [this message]
2021-09-14 21:56 ` [PATCH] drm/amd/display: Reduce stack size for dml21_ModeSupportAndSystemConfigurationFull Arnd Bergmann
2021-09-16 14:34 ` Leo Li
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