From: Yongqiang Sun <yongqiang.sun@amd.com>
Date: Tue, 17 Oct 2017 14:54:58 -0400
Subject: drm/amd/display: Check cursor address before program.
Git-commit: 4c7d45fae841a7f3e2d129185acf66f1c7ae37e5
Patch-mainline: v4.16-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Program cursor attributes during set mode is only needed
in case of pipe slipt, bottom pipe should be programmed
same as top pipe. Need to program if address is 0.

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -2438,7 +2438,8 @@ static void program_all_pipe_in_tree(
 		/* TODO: this is a hack w/a for switching from mpo to pipe split */
 		dc_stream_set_cursor_position(pipe_ctx->stream, &position);
 
-		dc_stream_set_cursor_attributes(pipe_ctx->stream,
+		if (pipe_ctx->stream->cursor_attributes.address.quad_part != 0)
+			dc_stream_set_cursor_attributes(pipe_ctx->stream,
 				&pipe_ctx->stream->cursor_attributes);
 
 		if (cur_pipe_ctx->plane_state != pipe_ctx->plane_state) {