[alsa-devel] my driver can't reproduce continuously

Kuninori Morimoto morimoto.kuninori at renesas.com
Mon Jul 27 11:50:25 CEST 2009

Dear Takashi

> Yes, because the PCM core thinks a buffer underrun happens,
> judging from the pointer callback value your driver returned.
> That's why I asked many times to check the values returned from the
> pointer callback.  This value and the timing of
> snd_pcm_period_elapsed() is the only information the PCM core checks.

Thank you and sorry.
I didn't know the "ring buffer".

The return value of pointer funtion seems OK.
But I didn't use ring buffer.
this is the reason driver will be stopped.

Best regards
Kuninori Morimoto

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