[Pkg-n900-maint] Packaging phone functionality for Debian/N900

[Sebastian Reichel]

Hi,

On Sat, Jul 23, 2016 at 12:47:15AM +0200, Pavel Machek wrote:
> On Fri 2016-07-22 21:21:42, Sicelo wrote:
> > On Fri, Jul 22, 2016 at 01:45:57PM -0500, Serge E. Hallyn wrote:
> > > 
> > > So maybe I'm ignorant of ongoing cooperation, but last I knew the
> > > neo900 was still an existing project.  Seems like a working upstream
> > > debian would be valuable there.  Are they at all involved?
> > > 
> > > -serge
> > > 
> > Hi Serge
> > 
> > The Neo900 is practically a 'regular' N900 - those are the design aims.
> > What works for N900 will work for Neo900. There are very few differences
> > (e.g. modem).
> 
> Well, that'll be quite true for userland, but not for kernel, right?

This is their block diagram:

https://neo900.org/stuff/block-diagrams/neo900/neo900

> I see different SoC

They currently plan to use a DM3730CBP, which is quite similar to
N900's omap3430.

> and modem, at the very least. Will it still take
> "phonet" protocol? Will it have same design w.r.t. GSM voice?

Modem is completly different. No phonet and no cmtspeechdata.
Modem gets audio data via PCM as far as I can see, so simple
GSM voice can be done by correctly configuring the sound
modules in ALSA.

> Audio setup is quite difficult/tricky. Neo900 will have one more
> microphone AFAICT. Surely they'll want to use DSP during audio calls?
> (Ok, we should probably use DSP on N900, too, to get loudspeaker car
> mode...)
>
> Will the peripherals on i2c be the same? What about camera? (I guess
> different SoC will have impact there).

You can see in the diagram, that peripherals are partly the same,
but mostly different (newer/with more features).

> So yes, Neo900 is close to N900, but then... anything with keyboard
> and resistive display is :-).

Neo900 is closer to N900 than just a random device with keyboard +
resistive display. But yes, they will need other kernel drivers.

Anyways - proper userspace software is definitely a problem for
both projects. Maybe some application from Ubuntu Phone could be
used (I never looked at their applications, so it may not be
possible easily).

-- Sebastian
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