linux-kernel - Re: USB networking news, ofono for d4: less hacked version

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Message-ID: <20200506230525.GA22354@amd>
Date:   Thu, 7 May 2020 01:05:25 +0200
From:   Pavel Machek <pavel@....cz>
To:     Tony Lindgren <tony@...mide.com>
Cc:     kernel list <linux-kernel@...r.kernel.org>,
        linux-omap@...r.kernel.org, sre@...nel.org, nekit1000@...il.com,
        mpartap@....net, merlijn@...zup.org, martin_rysavy@...trum.cz
Subject: Re: USB networking news, ofono for d4: less hacked version

On Wed 2020-05-06 07:43:38, Tony Lindgren wrote:
> * Pavel Machek <pavel@....cz> [200506 10:12]:
> > Hi!
> > 
> > So... I found out that USB networking works way better when I don't
> > attempt to charge the phone at the same. Yes, green light was
> > blinking.
> 
> OK yes we don't have much of a charger detection currently and the
> charger tries to reconnect with the LED blinking rapidly with an
> empty battery.

Do you have an idea why that causes problems with usb data connection?

I created a script to disable charging -- and that works. I also found
out cable about 5cm long. Not nice to use, but works significantly
better w.r.t. charging.

> > To github.com:pavelmachek/ofono.git
> >    e7b58fdd..1e7e5ce3  mux-v1.19-2 -> mux-v1.19-2
> > 
> > which creates copy of atchat, so I don't damage existing
> > functionality. It still seems to somehow work. Lot more work is still
> > needed. Designed to work with latest kernel patches from Tony, using
> > gsmmux interfaces.
> 
> OK, sounds like that should work :)

As I said, still ton of work to do :-(.

> I still need to figure update audio notifications for the current set of
> gsmmux patches. Eventually maybe ofono can just set the voice call audio
> routing using alsa. But let's get the kernel notifications working first
> as we also need to fix up the audio parts for the earlier comments from
> Peter and Sebastian.

Ofono does not normally touch ALSA, so I'd prefer not to do it from
there.

But I might be confused. I recall some audio patches were needed for
basic phone calls (setting up mixers to connect gsm<->audio), but
those worked before gsmux support was enabled. (Maybe some hardcoded
commands were needed to be sent to gsmmux somewhere).

I assume neither gsmmux audio parts nor mixer parts are available in
-next at the moment?

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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