ce4231_set_port
int ce4231_set_port(void *, mixer_ctrl_t *);
.set_port = ce4231_set_port,
ce4231_set_port(sc, &cp);
ce4231_set_port(sc, &cp);
ce4231_set_port(sc, &cp);
ce4231_set_port(sc, &cp);
ce4231_set_port(sc, &cp);
ce4231_set_port(sc, &cp);