[alsa-devel] [PATCH 2/2] ASoC: codecs: Add da7218 codec driver

[Mark Brown]

On Tue, Nov 10, 2015 at 01:55:30PM +0000, Opensource [Adam Thomson] wrote:
> On November 9, 2015 14:02, Mark Brown wrote:

> > The general userspace expectation is that the detection is always active
> > and consistent rather than varying at runtime - runtime variability
> > might be a bit surprising for it, and even then variability in what is
> > detected based on other settings is a bit surprising.  If the hardware
> > is that limited I guess it's about all that can be done but I'm still
> > not clear what the use cases are for configuring the levels (as opposed
> > ot the routing).

> How about the example of always on voice in Android, which can be enabled and
> disabled, depending on user settings, and routing will vary depending on which
> mic is in use at the time? For the levelling is it not plausible that a user
> could configure the level based on their current environment. You have
> moderately loud background noise, then your threshold would want to be
> higher, but in a quiet environment the likelihood is you would want to lower
> that threshold?

So this *isn't* a normal mic detection feature?  What's the userspace
interface for reporting then?
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