MTK do rotation checking and transferring in layer check function,
but we do not check that in atomic_check,
so add back in atomic_check function.

Fixes: 920fffcc8912 ("drm/mediatek: update cursors by using async atomic 
update")

Signed-off-by: Bibby Hsieh <bibby.hs...@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_plane.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c 
b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
index 189744d34f53..d32b494ff1de 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
@@ -81,6 +81,7 @@ static int mtk_plane_atomic_async_check(struct drm_plane 
*plane,
                                        struct drm_plane_state *state)
 {
        struct drm_crtc_state *crtc_state;
+       int ret;
 
        if (plane != state->crtc->cursor)
                return -EINVAL;
@@ -91,6 +92,11 @@ static int mtk_plane_atomic_async_check(struct drm_plane 
*plane,
        if (!plane->state->fb)
                return -EINVAL;
 
+       ret = mtk_drm_crtc_plane_check(state->crtc, plane,
+                                      to_mtk_plane_state(state));
+       if (ret)
+               return ret;
+
        if (state->state)
                crtc_state = drm_atomic_get_existing_crtc_state(state->state,
                                                                state->crtc);
-- 
2.18.0
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