[alsa-devel] [PATCH RFC v4 2/8] ALSA: pcm: add IEC958 channel status helper for hw_params

[Jyri Sarha]

On 09/21/15 18:08, Clemens Ladisch wrote:
>> >But there is no downside in using prepare callback.
> The prepare callback also can be called multiple times.  This certainly
> happens when the stream is stopped/restarted multiple times.
>
> If something does not need to be done again when a stream is restarted,
> then it should be done in the hw_params callback.

Oh, forgot about that. This would suggest to keep the stream header 
configuration in the hw_params().

Thanks,
Jyri