[alsa-devel] Generic clock divider indices

Daniel Mack zonque at gmail.com
Thu Jun 6 16:09:52 CEST 2013

On 06.06.2013 15:56, Mark Brown wrote:
> On Thu, Jun 06, 2013 at 03:44:04PM +0200, Daniel Mack wrote:
>> Would it be an idea to define some commonly used dividers in the core?
>> If they start at 0x80000000, they won't collide with existing ones, and
>> we could simply add them as alternative case statements to existing drivers.
> I don't think this is a terribly sensible idea; as soon as you start
> relying on these dividers in machine code you're going to run into
> drivers that just don't implement them either due to hardware or due to
> them being able to figure things out by themselves and...

I do see that we have a way to propagate the sysclk, but how would you
determine the bit clock rate from a codec driver?

Also, the same problem with freely definable indices is true for
.set_sysclk() as well. Not all drivers expect the actual MCLK rate here.


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