[alsa-devel] [PATCH] [v2] ASoC: support all possible sample rates in the WM8776 driver
broonie at opensource.wolfsonmicro.com
Sat Sep 17 14:58:18 CEST 2011
On Fri, Sep 16, 2011 at 01:25:08PM -0500, Timur Tabi wrote:
> Mark Brown wrote:
> > Right, but the two things aren't connected. As I've *repeatedly* said
> > the list of supported sample rates in the DAI should be the full set
> > that the device can support, unrelated to any clock setup.
> But I could hook up any frequency to audmclk and dacmclk. What if I want
> 40000Hz as a sample rate? I could then then set mclk to 15.36MHz.
If the CODEC supports continuous rates it'll say so and nothing in the
CODEC driver will stop that being selected.
> I don't see how the codec driver can know what sample rates it supports until
> *after* set_sysclk() is called (i.e. when the driver is told the value of mclk).
The part will have been specified and qualified for a set of sample
rates. These will be listed in the datasheet and are the rates the
driver should advertise.
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