drm/amd/display: Move AllowDRAMSelfRefreshOrDRAMClockChangeInVblank to bounding box

[Why]
This is a global parameter, not a per pipe parameter and it's useful
for experimenting with the prefetch schedule to be adjustable from
the SOC bb.

[How]
Add a parameter to the SOC bb, default is the existing policy for
all DCN. Fill it in when filling SOC bb parameters.

Revert the policy to use MinDCFClk at the same time since that's not
going to give us P-State in most cases on the spreadsheet.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1403
Signed-off-by: Nicholas Kazlauskas <[email protected]>
Signed-off-by: Aurabindo Pillai <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Acked-by: Alex Deucher <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: Nicholas Kazlauskas

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c

@@ -92,7 +92,7 @@
 #define DC_LOGGER_INIT(logger)
 
 struct _vcs_dpi_ip_params_st dcn3_0_ip = {
-	.use_min_dcfclk = 1,
+	.use_min_dcfclk = 0,
 	.clamp_min_dcfclk = 0,
 	.odm_capable = 1,
 	.gpuvm_enable = 0,

drivers/gpu/drm/amd/display/dc/dml/dcn30/display_mode_vba_30.c

@@ -3644,8 +3644,7 @@ static double TruncToValidBPP(
 void dml30_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_lib)
 {
 	struct vba_vars_st *v = &mode_lib->vba;
-	int MinPrefetchMode = 0;
-	int MaxPrefetchMode = 2;
+	int MinPrefetchMode, MaxPrefetchMode;
 	int i;
 	unsigned int j, k, m;
 	bool   EnoughWritebackUnits = true;
@@ -3657,6 +3656,10 @@ void dml30_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
 
 	/*MODE SUPPORT, VOLTAGE STATE AND SOC CONFIGURATION*/
 
+	CalculateMinAndMaxPrefetchMode(
+		mode_lib->vba.AllowDRAMSelfRefreshOrDRAMClockChangeInVblank,
+		&MinPrefetchMode, &MaxPrefetchMode);
+
 	/*Scale Ratio, taps Support Check*/
 
 	v->ScaleRatioAndTapsSupport = true;

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

@@ -244,6 +244,8 @@ static void fetch_socbb_params(struct display_mode_lib *mode_lib)
 	mode_lib->vba.DRAMClockChangeSupportsVActive = !soc->disable_dram_clock_change_vactive_support ||
 			mode_lib->vba.DummyPStateCheck;
 	mode_lib->vba.AllowDramClockChangeOneDisplayVactive = soc->allow_dram_clock_one_display_vactive;
+	mode_lib->vba.AllowDRAMSelfRefreshOrDRAMClockChangeInVblank =
+		soc->allow_dram_self_refresh_or_dram_clock_change_in_vblank;
 
 	mode_lib->vba.Downspreading = soc->downspread_percent;
 	mode_lib->vba.DRAMChannelWidth = soc->dram_channel_width_bytes;   // new!
@@ -733,8 +735,6 @@ static void fetch_pipe_params(struct display_mode_lib *mode_lib)
 						mode_lib->vba.OverrideHostVMPageTableLevels;
 	}
 
-	mode_lib->vba.AllowDRAMSelfRefreshOrDRAMClockChangeInVblank = dm_try_to_allow_self_refresh_and_mclk_switch;
-
 	if (mode_lib->vba.OverrideGPUVMPageTableLevels)
 		mode_lib->vba.GPUVMMaxPageTableLevels = mode_lib->vba.OverrideGPUVMPageTableLevels;