drm/amd/display: reduce stack for dml32_CalculateWatermarksMALLUseAndDRAMSpeedChangeSupport

Move stack variables to dummy structure.
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>

drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c

@@ -1165,6 +1165,7 @@ static void DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerforman
 		v->dummy_vars.DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerformanceCalculation.mmSOCParameters.SMNLatency = mode_lib->vba.SMNLatency;
 
 		dml32_CalculateWatermarksMALLUseAndDRAMSpeedChangeSupport(
+			&v->dummy_vars.dml32_CalculateWatermarksMALLUseAndDRAMSpeedChangeSupport,
 			mode_lib->vba.USRRetrainingRequiredFinal,
 			mode_lib->vba.UsesMALLForPStateChange,
 			mode_lib->vba.PrefetchModePerState[mode_lib->vba.VoltageLevel][mode_lib->vba.maxMpcComb],
@@ -3493,6 +3494,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
 
 			{
 				dml32_CalculateWatermarksMALLUseAndDRAMSpeedChangeSupport(
+						&v->dummy_vars.dml32_CalculateWatermarksMALLUseAndDRAMSpeedChangeSupport,
 						mode_lib->vba.USRRetrainingRequiredFinal,
 						mode_lib->vba.UsesMALLForPStateChange,
 						mode_lib->vba.PrefetchModePerState[i][j],

drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.h

@@ -810,6 +810,7 @@ void dml32_CalculateFlipSchedule(
 		bool *ImmediateFlipSupportedForPipe);
 
 void dml32_CalculateWatermarksMALLUseAndDRAMSpeedChangeSupport(
+		struct dml32_CalculateWatermarksMALLUseAndDRAMSpeedChangeSupport *st_vars,
 		bool USRRetrainingRequiredFinal,
 		enum dm_use_mall_for_pstate_change_mode UseMALLForPStateChange[],
 		unsigned int PrefetchMode,

drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.h

@@ -214,6 +214,39 @@ struct dml32_CalculateVMRowAndSwath {
 	bool one_row_per_frame_fits_in_buffer[DC__NUM_DPP__MAX];
 };
 
+struct dml32_CalculateWatermarksMALLUseAndDRAMSpeedChangeSupport {
+	unsigned int SurfaceWithMinActiveFCLKChangeMargin;
+	unsigned int DRAMClockChangeSupportNumber;
+	unsigned int LastSurfaceWithoutMargin;
+	unsigned int DRAMClockChangeMethod;
+	bool FoundFirstSurfaceWithMinActiveFCLKChangeMargin;
+	double MinActiveFCLKChangeMargin;
+	double SecondMinActiveFCLKChangeMarginOneDisplayInVBLank;
+	double ActiveClockChangeLatencyHidingY;
+	double ActiveClockChangeLatencyHidingC;
+	double ActiveClockChangeLatencyHiding;
+	double EffectiveDETBufferSizeY;
+	double ActiveFCLKChangeLatencyMargin[DC__NUM_DPP__MAX];
+	double USRRetrainingLatencyMargin[DC__NUM_DPP__MAX];
+	double TotalPixelBW;
+	bool SynchronizedSurfaces[DC__NUM_DPP__MAX][DC__NUM_DPP__MAX];
+	double EffectiveLBLatencyHidingY;
+	double EffectiveLBLatencyHidingC;
+	double LinesInDETY[DC__NUM_DPP__MAX];
+	double LinesInDETC[DC__NUM_DPP__MAX];
+	unsigned int LinesInDETYRoundedDownToSwath[DC__NUM_DPP__MAX];
+	unsigned int LinesInDETCRoundedDownToSwath[DC__NUM_DPP__MAX];
+	double FullDETBufferingTimeY;
+	double FullDETBufferingTimeC;
+	double WritebackDRAMClockChangeLatencyMargin;
+	double WritebackFCLKChangeLatencyMargin;
+	double WritebackLatencyHiding;
+	bool SameTimingForFCLKChange;
+	unsigned int TotalActiveWriteback;
+	unsigned int LBLatencyHidingSourceLinesY[DC__NUM_DPP__MAX];
+	unsigned int LBLatencyHidingSourceLinesC[DC__NUM_DPP__MAX];
+};
+
 struct DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerformanceCalculation {
 	unsigned int dummy_integer_array[2][DC__NUM_DPP__MAX];
 	double dummy_single_array[2][DC__NUM_DPP__MAX];
@@ -287,6 +320,7 @@ struct dummy_vars {
 	struct dml32_ModeSupportAndSystemConfigurationFull dml32_ModeSupportAndSystemConfigurationFull;
 	struct dml32_CalculateSwathAndDETConfiguration dml32_CalculateSwathAndDETConfiguration;
 	struct dml32_CalculateVMRowAndSwath dml32_CalculateVMRowAndSwath;
+	struct dml32_CalculateWatermarksMALLUseAndDRAMSpeedChangeSupport dml32_CalculateWatermarksMALLUseAndDRAMSpeedChangeSupport;
 };
 
 struct vba_vars_st {