const char *snd_pcm_format_name(snd_pcm_format_t format);
/**
- * Get a string naming the direction of a stream
+ * snd_pcm_stream_str - Get a string naming the direction of a stream
+ * @substream: the pcm substream instance
*/
static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream)
{