[alsa-devel] [PATCH 4/4] pxa-ssp: switch from network mode to psp
daniel at caiaq.de
Thu Mar 5 12:26:24 CET 2009
On Thu, Mar 05, 2009 at 11:21:33AM +0000, Mark Brown wrote:
> > > Shouldn't this be somehow set by set_dai_clkdiv instead?
> > This is actually a very common case - MCLK is BCLK*4, so I put it here.
> > We could still move it to some more configurable place if it turns out
> > we need to configure it per board.
> It's a common option but far from universal - apart from anything else
> normally the MCLK requirement is a multiple of the sampling frequency
> rather than the bitclock rate so the ratio with BCLK will often vary
> with sample size. I've seen devices able to operate as low as 64fs and
> IIRC I've seen things up to 512fs, though 256fs is more common.
Ok, agreed. I moved that to my board file (using DIV_SCR) and will drop
that piece in the next patches.
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