vsp1_rwpf_init_ctrls
ret = vsp1_rwpf_init_ctrls(rpf, 0);
int vsp1_rwpf_init_ctrls(struct vsp1_rwpf *rwpf, unsigned int ncontrols);
ret = vsp1_rwpf_init_ctrls(wpf, num_flip_ctrls);