On Tue, Sep 03, 2019 at 04:19:10AM +0900, Katsuhiro Suzuki wrote: > On 2019/09/02 21:02, Mark Brown wrote:
> > The best way to handle this is to try to support both fixed and variable > > clock rates, some other drivers do this by setting constraints based on > > MCLK only if the MCLK has been set to a non-zero value. They have the > > machine drivers reset the clock rate to 0 when it goes idle so that no > > constraints are applied then. This means that if the machine has a > In my understanding, fixed and variable clock both use set_sysclk() for > telling their MCLK to codec driver. For fixed MCLK cases we need to > apply constraint but for variable MCLK cases we should not set > constraints at set_sysclk(). How can we identify these two cases...? Like I say it's usually done by settingthe MCLK to 0 when not in use and then not applying any constraints if there's no MCLK set.
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