drm: disconnect plane from fb/crtc when disabled

Since plane->fb and plane->crtc are set in drm_mode_setplane()
after update_plane(), They should be cleared after disable().

Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index f259a2563204..7710bcb4bd8d 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -348,6 +348,9 @@ void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
                         ret = plane->funcs->disable_plane(plane);
                         if (ret)
                                 DRM_ERROR("failed to disable plane with busy fb\n");
+                        /* disconnect the plane from the fb and crtc: */
+                        plane->fb = NULL;
+                        plane->crtc = NULL;
                 }
         }