drm/nouveau: Fix nv50_mstc->best_encoder()
As mentioned in the previous commit, we currently prevent new modesets on recently-removed MST connectors by returning no encoder from our ->best_encoder() callback once the MST port has disappeared. This is wrong however, because it prevents legacy modesetting users from being able to disable CRTCs on MST connectors after the connector's respective topology has disappeared. So, fix this by instead by just always returning a valid encoder. Changes since v2: - Remove usage of atomic MST helper for now, since that got replaced with a much simpler solution Signed-off-by: NLyude Paul <lyude@redhat.com> Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: NBen Skeggs <bskeggs@redhat.com> Cc: stable@vger.kernel.org Link: https://patchwork.freedesktop.org/patch/msgid/20181008232437.5571-3-lyude@redhat.com (cherry picked from commit e87b0bbc) Signed-off-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Showing
想要评论请 注册 或 登录