linux-kernel - Re: omap4-droid4: voice call support was Re: [PATCHv5,5/5] ARM: dts: omap4-droid4: add soundcard

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Date:   Thu, 29 Mar 2018 09:34:50 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     Pavel Machek <pavel@....cz>
Cc:     Sebastian Reichel <sebastian.reichel@...labora.co.uk>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-omap@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...labora.com,
        Dan Williams <dcbw@...hat.com>
Subject: Re: omap4-droid4: voice call support was Re: [PATCHv5,5/5] ARM: dts:
 omap4-droid4: add soundcard

* Pavel Machek <pavel@....cz> [180329 16:09]:
> > Then using the n_gsm ts 27.010 uart mux, I dial:
> > 
> > ./ngsm-rw 1 "AT+CFUN=1"		# connect to network
> > U0001+CFUN:OK
> > ./ngsm-rw 2 "AT+CMUT=0"		# unmute speaker over ch2, do this over qmi?
> > U0001+CMUT:OK
> > ./ngsm-rw 1 "ATD#123"		# dial number
> > U0001D:OK
> > 
> > And I do hear a voice talking over the speakerphone :) Sorry have not tested the
> > mic yet..
> 
> Hehe, ok, that's fun! I don't need +CMUT=0. It gave me error but then
> the call worked, anyway... (I'm working with ttyUSB4).

Oh interesting. So maybe Android is doing AT+CMUT=0 for some other
modems and it's not really needed? Or you have settings preserved
from warm boot from Android?

I did not have any luck with ttyUSB4 last night. Did you dial with
ATD123; or ATD123? So is the semicolon really needed?

> I don't know how to hang the call up. ATH did not work for me.

OK ATH works for me on n_gsm channel 1.

> And no, microphone does not work.

Yeah so conf calls only for now.

Tony