[alsa-devel] [PATCH 2/4] soc-dai: add bitfields for hardware I2S formats

Daniel Mack daniel at caiaq.de
Thu Mar 5 13:55:21 CET 2009

On Thu, Mar 05, 2009 at 12:03:35PM +0000, Mark Brown wrote:
> > > The other option would be to use the TDM mode interface to set this up
> > > since that's roughly what it is; my main concern here is that we already
> > > have two ways of doing this and I'd like to try to keep the number down
> > > for consistency.
> > Probably a matter of taste, but IMO TDM mode is not the place either.
> > Userspace could decide sending out 24bit samples out of a sudden (which
> > the CPU DAI might accept) and in this case, you'd need some special
> > logic in the board file again to set up deviders, time slots etc, right?
> That's why the clocking interface is generally used here - it's more
> orthogonal.

Hmm, how would you express 24 sample bits with 32 clocks per channel? I
might not have gotten your point yet - could you provide an example?


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