drm/amd/display: Fix 300Hz Freesync bug

Needed to reprogram vblank_start in dml properly in order to get the
correct dlg params to program VTG.
Signed-off-by: Alvin Lee <alvin.lee2@amd.com>
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -287,7 +287,6 @@ bool dc_stream_adjust_vmin_vmax(struct dc *dc,
 		struct pipe_ctx *pipe = &dc->current_state->res_ctx.pipe_ctx[i];
 
 		if (pipe->stream == stream && pipe->stream_res.tg) {
-			pipe->stream->adjust = *adjust;
 			dc->hwss.set_drr(&pipe,
 					1,
 					adjust->v_total_min,

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

@@ -1883,12 +1883,14 @@ int dcn20_populate_dml_pipes_from_context(
 	for (i = 0, pipe_cnt = 0; i < dc->res_pool->pipe_count; i++) {
 		struct dc_crtc_timing *timing = &res_ctx->pipe_ctx[i].stream->timing;
 		unsigned int v_total;
+		unsigned int front_porch;
 		int output_bpc;
 
 		if (!res_ctx->pipe_ctx[i].stream)
 			continue;
 
 		v_total = timing->v_total;
+		front_porch = timing->v_front_porch;
 		/* todo:
 		pipes[pipe_cnt].pipe.src.dynamic_metadata_enable = 0;
 		pipes[pipe_cnt].pipe.src.dcc = 0;
@@ -1915,7 +1917,7 @@ int dcn20_populate_dml_pipes_from_context(
 				- timing->h_addressable
 				- timing->h_border_left
 				- timing->h_border_right;
-		pipes[pipe_cnt].pipe.dest.vblank_start = v_total - timing->v_front_porch;
+		pipes[pipe_cnt].pipe.dest.vblank_start = v_total - front_porch;
 		pipes[pipe_cnt].pipe.dest.vblank_end = pipes[pipe_cnt].pipe.dest.vblank_start
 				- timing->v_addressable
 				- timing->v_border_top

drivers/gpu/drm/amd/display/modules/freesync/freesync.c

@@ -812,11 +812,12 @@ void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync,
 			2 * in_out_vrr->min_refresh_in_uhz)
 		in_out_vrr->btr.btr_enabled = false;
 
-	in_out_vrr->fixed.fixed_active = false;
 	in_out_vrr->btr.btr_active = false;
 	in_out_vrr->btr.inserted_duration_in_us = 0;
 	in_out_vrr->btr.frames_to_insert = 0;
 	in_out_vrr->btr.frame_counter = 0;
+	in_out_vrr->fixed.fixed_active = false;
+	in_out_vrr->fixed.target_refresh_in_uhz = 0;
 
 	in_out_vrr->btr.mid_point_in_us =
 				(in_out_vrr->min_duration_in_us +