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

[Kuninori Morimoto]

Dear Takashi

Thank you for your comment

> > when 1st buffer was send,
> > driver stop.
> > 2nd trigger function isn't called.
> 
> Check the raw value returned from the pointer callback, too.
> This can be the real cause.

I might have been doing a very big misunderstanding.

> The pointer callback is supposed to give the currently played position
> offset in a ring buffer, and ranged from 0 to buffer_size-1.

Does this "ring buffer" mean
I should transmit runtime->dma_area many times 
from offset 0x0 ??

=> when I call 4th elapsed,
   should I send runtime->dma_area + 0x0 again ?

If so,
my driver get STOP on trigger funtion many times
even if I didn't stop it.

START
STOP
underrun!!!
START
STOP
underrun!!!
...

Does this correct operation ?

Best regards
--
Kuninori Morimoto