Use drm_atomic_set_fb_for_plane() in the legacy ->page_flip path to track
the pointer plane_state->fb correctly.
Signed-off-by: NLiu Ying <gnuiyl@gmail.com>
Acked-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>