[PATCH 04/20] drm/amd/display: Handle get crtc position error

[Bhawanpreet Lakha]

From: David Francis <David.Francis at amd.com>

[Why]
dc_stream_get_crtc_position can return false.
This was unhandled in delay_cursor_until_vupdate

[How]
If dc_stream_get_crtc_position returns false, something
is weird.  Don't delay.

Change-Id: Id0fc61792aaa248594deb46d9984bcb3fb78559c
Signed-off-by: David Francis <David.Francis at amd.com>
Reviewed-by: Sun peng Li <Sunpeng.Li at amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet Lakha at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_stream.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
index f7a293902234..e10479d58c11 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
@@ -211,7 +211,8 @@ static void delay_cursor_until_vupdate(struct pipe_ctx *pipe_ctx, struct dc *dc)
 			ASIC_REV_IS_RAVEN(stream->ctx->asic_id.hw_internal_rev)) {
 
 		vupdate_line = get_vupdate_offset_from_vsync(pipe_ctx);
-		dc_stream_get_crtc_position(dc, &stream, 1, &vpos, &nvpos);
+		if (!dc_stream_get_crtc_position(dc, &stream, 1, &vpos, &nvpos))
+			return;
 
 		if (vpos >= vupdate_line)
 			return;
-- 
2.17.1