linux-kernel - Re: handling voice calls in ALSA soc (on Droid 4)

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Date:   Mon, 11 Jun 2018 14:01:58 +0200
From:   Pavel Machek <pavel@....cz>
To:     Mark Brown <broonie@...nel.org>
Cc:     kernel list <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-omap@...r.kernel.org, tony@...mide.com, sre@...nel.org,
        nekit1000@...il.com, mpartap@....net, merlijn@...zup.org,
        alsa-devel@...a-project.org, tiwai@...e.com, perex@...ex.cz,
        lgirdwood@...il.com
Subject: Re: handling voice calls in ALSA soc (on Droid 4)

On Mon 2018-06-11 12:10:11, Mark Brown wrote:
> On Mon, Jun 11, 2018 at 12:25:30PM +0200, Pavel Machek wrote:
> 
> > ...and also. What is right interface for this? Mixer component that
> > says if voice call is active or not?
> 
> Your modem should be represented as a component in the system and have
> an input and an output representing the input and output on the cell
> network.  See speyside for an example of how this can look in software
> though there's a bunch of different ways modems can appear so you might
> not have a fully digital link like that.

Thanks for the pointer.

With setup like that, how does userland tell kernel that the baseband
<-> microphone/speaker connection should be activated?

Best regards,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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