snd_pcm_trigger_done (9) Linux Manual Page
snd_pcm_trigger_done – Mark the master substream
Synopsis
void snd_pcm_trigger_done(struct snd_pcm_substream *substream, struct snd_pcm_substream *master);Arguments
substream
-
- the pcm substream instance
master
- the linked master substream
Description
When multiple substreams of the same card are linked and the hardware supports the single-shot operation, the driver calls this in the loop in snd_pcm_group_for_each_entry for marking the substream as “done”. Then most of trigger operations are performed only to the given master substream.
The trigger_master mark is cleared at timestamp updates at the end of trigger operations.