From: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
commit d29fb7baab09b6a1dc484c9c67933253883e770a upstream.
[Why]
While scanning the top_pipe connections we can run into a case where
the bottom pipe is still connected to a top_pipe but with a NULL
plane_state.
[How]
Treat a NULL plane_state the same as the plane being invisible for
pipe cursor disable logic.
Cc: stable@xxxxxxxxxxxxxxx
Cc: Mario Limonciello <mario.limonciello@xxxxxxx>
Reviewed-by: Charlene Liu <Charlene.Liu@xxxxxxx>
Acked-by: Qingqing Zhuo <qingqing.zhuo@xxxxxxx>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 4 +++-
1 file changed, 3 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
@@ -3383,7 +3383,9 @@ static bool dcn10_can_pipe_disable_curso
for (test_pipe = pipe_ctx->top_pipe; test_pipe;
test_pipe = test_pipe->top_pipe) {
// Skip invisible layer and pipe-split plane on same layer
- if (!test_pipe->plane_state->visible || test_pipe->plane_state->layer_index == cur_layer)
+ if (!test_pipe->plane_state ||
+ !test_pipe->plane_state->visible ||
+ test_pipe->plane_state->layer_index == cur_layer)
continue;
r2 = test_pipe->plane_res.scl_data.recout;
