snd_rme32_playback_prepare
.prepare = snd_rme32_playback_prepare,
.prepare = snd_rme32_playback_prepare,
.prepare = snd_rme32_playback_prepare,
.prepare = snd_rme32_playback_prepare,
static int snd_rme32_playback_prepare(struct snd_pcm_substream *substream);