es1371_dac_rate
es1371_dac_rate(es, 22050, ES_DAC1);
es1371_dac_rate(es, 22050, ES_DAC2);
static unsigned int es1371_dac_rate(struct es_info *, unsigned int, int);
i = es1371_dac_rate(es, speed, ch->index); /* play */