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

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Date:   Mon, 11 Jun 2018 12:10:11 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Pavel Machek <pavel@....cz>
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, 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.

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