[review] Use AT+CESQ for signal interface in MBIM modems if TTY available

[Dan Williams]

On Thu, 2018-08-09 at 13:47 +0200, Aleksander Morgado wrote:
> Hey,
> 
> > 
> > This MR enables support for the "Signal" interface in MBIM modems
> > if
> > they expose an AT-capable TTY port and AT+CESQ is supported. If no
> > AT
> > port is available in the device, the modem will report no extended
> > signal capabilities, as it was doing until now for all MBIM modems.
> > 
> > https://gitlab.freedesktop.org/mobile-broadband/ModemManager/merge_
> > requests/18
> > 
> 
> I've closed this MR because I think using the MBIM AT&T extensions
> service to get the same information fits much better in the MBIM
> modem
> object:
> https://gitlab.freedesktop.org/mobile-broadband/ModemManager/merge_re
> quests/25

I think that's probably fine for now, though I would bet there will be
modems that don't implement ATDS and do implement CESQ in the future,
if they don't exist already.

Dan