6.8-stable review patch. If anyone has any objections, please let me know. ------------------ From: Wenjing Liu <wenjing.liu@xxxxxxx> commit 81901d8d0472e9a19d294ae1dea76b950548195d upstream. [why] In current implemenation ODM mode is only reset when the last plane is removed from dc state. For any dc validate we will always remove all current planes and add new planes. However when switching from no planes to 1 plane, ODM mode is not reset because no planes get removed. This has caused an issue where we kept ODM combine when it should have been remove when a plane is added. The change is to reset ODM mode when adding the first plane. Cc: stable@xxxxxxxxxxxxxxx Reviewed-by: Alvin Lee <alvin.lee2@xxxxxxx> Acked-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx> Signed-off-by: Wenjing Liu <wenjing.liu@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/amd/display/dc/core/dc_state.c | 9 +++++++++ 1 file changed, 9 insertions(+) --- a/drivers/gpu/drm/amd/display/dc/core/dc_state.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_state.c @@ -436,6 +436,15 @@ bool dc_state_add_plane( goto out; } + if (stream_status->plane_count == 0 && dc->config.enable_windowed_mpo_odm) + /* ODM combine could prevent us from supporting more planes + * we will reset ODM slice count back to 1 when all planes have + * been removed to maximize the amount of planes supported when + * new planes are added. + */ + resource_update_pipes_for_stream_with_slice_count( + state, dc->current_state, dc->res_pool, stream, 1); + otg_master_pipe = resource_get_otg_master_for_stream( &state->res_ctx, stream); if (otg_master_pipe)
