atmel_hlcdc_layer_to_plane
primary = atmel_hlcdc_layer_to_plane(dc->layers[i]);
cursor = atmel_hlcdc_layer_to_plane(dc->layers[i]);
overlay = atmel_hlcdc_layer_to_plane(dc->layers[i]);
atmel_hlcdc_plane_irq(atmel_hlcdc_layer_to_plane(layer));