drm/amd/display: used optimum VSTARTUP instead of MaxVStartup

[Description]
Features that are desirable for minimizing the Global Sync Period:
DRR and lateflip
Signed-off-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c

@@ -1671,6 +1671,8 @@ int dcn20_populate_dml_pipes_from_context(
 			/* Unknown link capabilities, so assume max */
 			pipes[pipe_cnt].dout.dp_lanes = 4;
 		}
+		pipes[pipe_cnt].pipe.dest.vtotal_min = res_ctx->pipe_ctx[i].stream->adjust.v_total_min;
+		pipes[pipe_cnt].pipe.dest.vtotal_max = res_ctx->pipe_ctx[i].stream->adjust.v_total_max;
 
 		pipes[pipe_cnt].dout.output_bpp = res_ctx->pipe_ctx[i].stream->timing.display_color_depth;
 		switch (res_ctx->pipe_ctx[i].stream->signal) {
@@ -1749,6 +1751,8 @@ int dcn20_populate_dml_pipes_from_context(
 			pipes[pipe_cnt].pipe.scale_taps.vtaps = 1;
 			pipes[pipe_cnt].pipe.src.is_hsplit = 0;
 			pipes[pipe_cnt].pipe.dest.odm_combine = 0;
+			pipes[pipe_cnt].pipe.dest.vtotal_min = timing->v_total;
+			pipes[pipe_cnt].pipe.dest.vtotal_max = timing->v_total;
 		} else {
 			struct dc_plane_state *pln = res_ctx->pipe_ctx[i].plane_state;
 			struct scaler_data *scl = &res_ctx->pipe_ctx[i].plane_res.scl_data;

drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20.c

@@ -2698,8 +2698,12 @@ static void dml20_DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPer
 					VStartupMargin = dml_min(VStartupMargin, Margin);
 		}
 
-		if (mode_lib->vba.UseMaximumVStartup)
-			mode_lib->vba.VStartup[k] = mode_lib->vba.MaxVStartupLines[mode_lib->vba.BlendingAndTiming[k]];
+		if (mode_lib->vba.UseMaximumVStartup) {
+			if (mode_lib->vba.VTotal_Max[k] == mode_lib->vba.VTotal[k]) {
+				//only use max vstart if it is not drr or lateflip.
+				mode_lib->vba.VStartup[k] = mode_lib->vba.MaxVStartupLines[mode_lib->vba.BlendingAndTiming[k]];
+			}
+		}
 	}
 }
 }

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

@@ -284,6 +284,8 @@ struct vba_vars_st {
 	unsigned int VTAPsChroma[DC__NUM_DPP__MAX];
 	unsigned int HTotal[DC__NUM_DPP__MAX];
 	unsigned int VTotal[DC__NUM_DPP__MAX];
+	unsigned int VTotal_Max[DC__NUM_DPP__MAX];
+	unsigned int VTotal_Min[DC__NUM_DPP__MAX];
 	int DPPPerPlane[DC__NUM_DPP__MAX];
 	double PixelClock[DC__NUM_DPP__MAX];
 	double PixelClockBackEnd[DC__NUM_DPP__MAX];