[PATCH 52/77] drm/amd/display: work around for 8k sleep crash

[Harry Wentland]

From: Yongqiang Sun <yongqiang.sun at amd.com>

Change-Id: I1a7819cdb737b9cdab31479c91a389119f23b296
Signed-off-by: Yongqiang Sun <yongqiang.sun at amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
Acked-by: Harry Wentland <Harry.Wentland at amd.com>
---
 drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c          | 1 +
 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
index 5e5766a63a47..6c85a54e47d6 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
@@ -581,6 +581,7 @@ static void split_stream_across_pipes(
 	secondary_pipe->plane_res.ipp = pool->ipps[secondary_pipe->pipe_idx];
 	secondary_pipe->plane_res.xfm = pool->transforms[secondary_pipe->pipe_idx];
 	if (primary_pipe->bottom_pipe) {
+		ASSERT(primary_pipe->bottom_pipe != secondary_pipe);
 		secondary_pipe->bottom_pipe = primary_pipe->bottom_pipe;
 		secondary_pipe->bottom_pipe->top_pipe = secondary_pipe;
 	}
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index bd023299e2af..498680a9b996 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -2358,7 +2358,7 @@ static void program_all_pipe_in_tree(
 		verify_allow_pstate_change_high(dc->hwseq);
 	}
 
-	if (pipe_ctx->bottom_pipe != NULL)
+	if (pipe_ctx->bottom_pipe != NULL && pipe_ctx->bottom_pipe != pipe_ctx)
 		program_all_pipe_in_tree(dc, pipe_ctx->bottom_pipe, context);
 }
 
-- 
2.11.0