[alsa-devel] [RFC 3/4] OMAP3: McBSP: Add interface for transmit FIFO state query

Jarkko Nikula jhnikula at gmail.com
Tue Mar 2 15:06:15 CET 2010

On Tue, 02 Mar 2010 15:52:00 +0200
Eero Nurkkala <ext-eero.nurkkala at nokia.com> wrote:

> Reading the XBUFFSTAT register is by no means accurate.
> IIRC, it reports the buffer status incorrectly about 1/50 times
> on average (@ 48000khz); with simple math, it may be read during the DMA
> burst. Or is it guaranteed not being read during DMA transfer / have
> you otherwise verified the behavior?
Do you remember how big was this variation? Was it near the burst size
or some arbitrary difference?


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