linux-kernel - RE: [PATCH 2/2] ASoC: codecs: Add da7218 codec driver

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Date:	Mon, 9 Nov 2015 12:28:39 +0000
From:	"Opensource [Adam Thomson]" <Adam.Thomson.Opensource@...semi.com>
To:	Mark Brown <broonie@...nel.org>,
	"Opensource [Adam Thomson]" <Adam.Thomson.Opensource@...semi.com>
CC:	Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Support Opensource" <Support.Opensource@...semi.com>
Subject: RE: [PATCH 2/2] ASoC: codecs: Add da7218 codec driver

On November 8, 2015 10:34, Mark Brown wrote:

> > > Hang on, is this just recording a DC value with the ADC and then looking
> > > at that?
> 
> > The RMS of the Mic signal is taken and compared to the trigger level set. If
> > it's above that level then an IRQ is raised.
> 
> What I'm trying to figure out here is if this depends on the audio
> routing at runtime or if it's got dedicated configuration?

This feature is available for any/all mics connected. Which mics are enabled
is a runtime configuration of routing, so to me it makes sense also that we can
configure which channel triggers an event, based on our scenario at that time.