From: Yongqiang Sun <yongqiang.sun@amd.com>
Date: Tue, 21 Nov 2017 16:12:23 -0500
Subject: drm/amd/display: Cache cursor position.
Git-commit: ea783c31e270dbdd82d5b9d40de4e6336e92e5b2
Patch-mainline: v4.16-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

When programming cursor position after front end programmed,
if position is already set previously, it doesn't make sense
to program position with all 0.
Cache position and use the parameter after front end programming.

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/core/dc_stream.c |    2 ++
 drivers/gpu/drm/amd/display/dc/dc_stream.h      |    1 +
 2 files changed, 3 insertions(+)

--- a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
@@ -301,6 +301,8 @@ bool dc_stream_set_cursor_position(
 
 	}
 
+	stream->cursor_position = *position;
+
 	return true;
 }
 
--- a/drivers/gpu/drm/amd/display/dc/dc_stream.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h
@@ -86,6 +86,7 @@ struct dc_stream_state {
 	struct dc_stream_status status;
 
 	struct dc_cursor_attributes cursor_attributes;
+	struct dc_cursor_position cursor_position;
 
 	/* from stream struct */
 	struct kref refcount;