drm/amd/display: Don't set dram clock change requirement for SubVP

[Description]
In general cases we want to keep the dram clock change requirement (we
prefer configs that support MCLK switch). Only override to false for
SubVP.
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alvin Lee <Alvin.Lee2@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -184,6 +184,7 @@ struct _vcs_dpi_soc_bounding_box_st {
 	double max_avg_fabric_bw_use_normal_percent;
 	double max_avg_dram_bw_use_normal_strobe_percent;
 	enum dm_prefetch_modes allow_for_pstate_or_stutter_in_vblank_final;
+	bool dram_clock_change_requirement_final;
 	double writeback_latency_us;
 	double ideal_dram_bw_after_urgent_percent;
 	double pct_ideal_dram_sdp_bw_after_urgent_pixel_only; // PercentOfIdealDRAMFabricAndSDPPortBWReceivedAfterUrgLatencyPixelDataOnly

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

@@ -343,7 +343,7 @@ static void fetch_socbb_params(struct display_mode_lib *mode_lib)
 	mode_lib->vba.MaxAveragePercentOfIdealDRAMBWDisplayCanUseInNormalSystemOperationSTROBE =
 			soc->max_avg_dram_bw_use_normal_strobe_percent;
 
-	mode_lib->vba.DRAMClockChangeRequirementFinal = 1;
+	mode_lib->vba.DRAMClockChangeRequirementFinal = soc->dram_clock_change_requirement_final;
 	mode_lib->vba.FCLKChangeRequirementFinal = 1;
 	mode_lib->vba.USRRetrainingRequiredFinal = 1;
 	mode_lib->vba.ConfigurableDETSizeEnFinal = 0;