commit a14e9e0292e29939ef078ab7f5a337edcd796ca1
author Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com> Mon Aug 26 15:04:18 2019 -0400
committer Alex Deucher <alexander.deucher@amd.com> Tue Sep 17 08:06:54 2019 -0500
tree 463ae10ce1c1ac391b8f89f839438707d66e418b
parent d4252eee1f7cde7f8b1673626d1b49498c1d4f77

drm/amd/display: add vtg update after global sync update

Global sync update was missing vtg update resulting in underflow if
vstartup decreased a significant amount.

Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Reviewed-by: Jaehyun Chung <Jaehyun.Chung@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c

diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
index faaf884..4bb5ad1 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1361,7 +1361,7 @@
 			&& !pipe_ctx->top_pipe && !pipe_ctx->prev_odm_pipe)
 		dc->hwss.blank_pixel_data(dc, pipe_ctx, !pipe_ctx->plane_state->visible);
 
-	if (pipe_ctx->update_flags.bits.global_sync)
+	if (pipe_ctx->update_flags.bits.global_sync) {
 		pipe_ctx->stream_res.tg->funcs->program_global_sync(
 				pipe_ctx->stream_res.tg,
 				pipe_ctx->pipe_dlg_param.vready_offset,
@@ -1369,6 +1369,10 @@
 				pipe_ctx->pipe_dlg_param.vupdate_offset,
 				pipe_ctx->pipe_dlg_param.vupdate_width);
 
+		pipe_ctx->stream_res.tg->funcs->set_vtg_params(
+				pipe_ctx->stream_res.tg, &pipe_ctx->stream->timing);
+	}
+
 	if (pipe_ctx->update_flags.bits.odm)
 		dc->hwss.update_odm(dc, context, pipe_ctx);