HWDESC_PALETTE
ingenic_drm_configure_hwdesc(priv, HWDESC_PALETTE, 0, 0xc0);
desc = &priv->dma_hwdescs->hwdesc[HWDESC_PALETTE];
next_id = priv_state->use_palette ? HWDESC_PALETTE : 0;
next_id = (priv_state && priv_state->use_palette) ? HWDESC_PALETTE : plane_id;