From: Yongqiang Sun <yongqiang.sun@amd.com>
Date: Mon, 6 Mar 2017 14:58:59 -0500
Subject: drm/amd/display: Do not copy bottom pipe when map resource.
Git-commit: 268cadbd653d3d9172975a46c79f458475f82cb5
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@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_resource.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -1134,6 +1134,9 @@ enum dc_status resource_map_pool_resourc
 			if (!are_stream_backends_same(old_pipe_ctx->stream, stream))
 				continue;
 
+			if (old_pipe_ctx->top_pipe)
+				continue;
+
 			pipe_ctx->stream = stream;
 			copy_pipe_ctx(old_pipe_ctx, pipe_ctx);