Jon Smirl wrote:
> Here's how I implemented sync start/stop.......
Have a look at oxygen_trigger() in sound/pci/oxygen/oxygen_pcm.c for a
working sync start/stop implementation.
> snd_pcm_group_for_each_entry(substream, sub) {
>
> rtd = substream->private_data;
There is no guarantee the all linked substreams belong to the same card
or the same driver; you have to check that first and ignore streams you
don't know about.
> if (sub != substream)
> snd_pcm_trigger_done(substream, sub);
You can just call snd_pcm_trigger_done() for every substream you handle.
> ...
> }
> return 0;
There is no common code for the two substreams.
Is your hardware actually capable of starting them at exactly the same
time?
Best regards,
Clemens
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