[Buildroot] [PATCH] package/modem-manager: use libqmi and libmbim if they are selected

Yann E. MORIN yann.morin.1998 at free.fr
Tue May 5 17:06:53 UTC 2020


Thomas, Aleksander, All,

On 2020-04-19 23:00 +0200, Thomas Petazzoni spake thusly:
> Hello Carlos, Aleksander, Yegor,
> 
> On Mon,  4 Nov 2019 09:48:44 -0300
> unixmania at gmail.com wrote:
> 
> > If we have a cnfiguration like this
> > 
> >     BR2_PACKAGE_MODEM_MANAGER=y
> >     # BR2_PACKAGE_MODEM_MANAGER_LIBMBIM is not set
> >     BR2_PACKAGE_MODEM_MANAGER_LIBQMI=y
> >     [...]
> >     BR2_PACKAGE_LIBMBIM=y
> 
> I had a new look at this. We need a new iteration of this patch, since
> the build issue doesn't exist anymore.
> 
> However, I would suggest to take a simpler approach:
> 
>  - Keep the BR2_PACKAGE_MODEM_MANAGER_LIBMBIM and
>    BR2_PACKAGE_MODEM_MANAGER_LIBQMI options.
> 
>  - Change modem-manager.mk to test BR2_PACKAGE_LIBMBIM and
>    BR2_PACKAGE_QMI instead of BR2_PACKAGE_MODEM_MANAGER_LIBMBIM and
>    BR2_PACKAGE_MODEM_MANAGER_LIBQMI.

Sorry, but I disagree here: a user who elects to not enable 'MBIM
support' in modem-manager, but otherwise has libmbim enabled (for
whatever reason) will in fact get a modem-mamanger that has support for
MBIM. This is definitely counter-intuitive.

Ditto libqmi.

So I would rather agree with the original patch from Carlos (except for
the legacy handling, which is indeed not needed).

> Also, as was pointed out during the discussion, it would be good to
> change the network-manager package to not force the modem-manager
> MBIM/QMI support when modem-manager support is enabled. I.e, remove the
> following lines:
> 
>         select BR2_PACKAGE_MODEM_MANAGER_LIBMBIM
>         select BR2_PACKAGE_MODEM_MANAGER_LIBQMI
> 
> from package/network-manager/Config.in

I do agree with that too, which must be done in a separate patch.

Regards,
Yann E. MORIN.

> Could one of you have a look ?
> 
> Thanks a lot!
> 
> Thomas
> -- 
> Thomas Petazzoni, CTO, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com
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