snd_soc_dai_hw_free
void snd_soc_dai_hw_free(struct snd_soc_dai *dai,
snd_soc_dai_hw_free(source, substream, 0);
snd_soc_dai_hw_free(sink, substream, 0);
snd_soc_dai_hw_free(dai, substream, rollback);