linux-kernel - Re: N900 modem support in 3.18-rc1

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Date:	Fri, 7 Nov 2014 00:01:45 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Pavel Machek <pavel@....cz>
Cc:	Sebastian Reichel <sre@...nel.org>,
	kernel list <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel" <linux-arm-kernel@...ts.infradead.org>,
	linux-omap@...r.kernel.org, tony@...mide.com, khilman@...nel.org,
	aaro.koskinen@....fi, freemangordon@....bg,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>
Subject: Re: N900 modem support in 3.18-rc1

On Thursday 06 November 2014 23:50:05 Pavel Machek wrote:
> > > What is needed to get voice calls to work?
> > 
> > There's still a kernel driver missing in mainline for
> > exchanging voice data between the modem and the cpu (called
> > cmt-speech).
> > 
> > BTW the CMT driver should be removed from your kernel tree;
> > its a deprecated variant of mainline's nokia-modem driver.
> > Thus I guess the cmt-speech driver, which is available in
> > your kernel tree, is not properly integrated into the
> > changes I did during mainlining the other modem related
> > drivers.
> 
> Aha, so CONFIG_CMT is the same thing as CONFIG_NOKIA_NODEM?
> Ok, will disable that. Speech... if you'd have version I
> could test, I'll happily do that.
> 
> Thanks,
> 									Pavel

For voice calls you need:
* kernel driver cmt-speech (or it has some new name)
* cmt-speech userspace library (communication with kernel)
* pulseaudio modules which are using that library

Freemangordon (Ivaylo Dimitrov, CCed) should know more about it, 
specially about pulseaudio modules...

-- 
Pali Rohár
pali.rohar@...il.com

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