On Thu, Aug 22, 2019 at 2:47 AM Gerd Hoffmann <kraxel@xxxxxxxxxx> wrote:
>
> 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 a492ac3f4a7e..fe5efb2de90d 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_plane.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_plane.c
> @@ -84,7 +84,22 @@ 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);
Is drm_atomic_get_new_crtc_state better here?
> +
> + 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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