From: Nicholas Kazlauskas nicholas.kazlauskas@amd.com
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@vger.kernel.org Cc: Mario Limonciello mario.limonciello@amd.com Reviewed-by: Charlene Liu Charlene.Liu@amd.com Acked-by: Qingqing Zhuo qingqing.zhuo@amd.com Signed-off-by: Nicholas Kazlauskas nicholas.kazlauskas@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 @@ -3369,7 +3369,9 @@ 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;