Use drm_atomic_helper_check_plane_state()
to sanity check the plane state.
Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
---
drivers/gpu/drm/virtio/virtgpu_plane.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c b/drivers/gpu/drm/virtio/virtgpu_plane.c
index 024c2aa0c929..3b377bb5b5cb 100644
--- a/drivers/gpu/drm/virtio/virtgpu_plane.c
+++ b/drivers/gpu/drm/virtio/virtgpu_plane.c
@@ -82,7 +82,22 @@ static const struct drm_plane_funcs virtio_gpu_plane_funcs = {
static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
struct drm_plane_state *state)
{
- return 0;
+ bool is_cursor = plane->type == DRM_PLANE_TYPE_CURSOR;
+ struct drm_crtc_state *crtc_state;
+ int ret;
+
+ if (!state->fb | !state->crtc)
+ return 0;
+
+ crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
+ if (IS_ERR(crtc_state))
+ return PTR_ERR(crtc_state);
+
+ ret = drm_atomic_helper_check_plane_state(state, crtc_state,
+ DRM_PLANE_HELPER_NO_SCALING,
+ DRM_PLANE_HELPER_NO_SCALING,
+ is_cursor, true);
+ return ret;
}
static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
--
2.18.1
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