Support sending AT commnad by mbim-cli for Compal WWAN module

[Kai-Chuan Hsieh]

[ Impact ]

 * Add a service to make mbim-cli be able to send AT command to Compal WWAN module DW5826e through mbimcli

[ Test Plan ]

 * On the platform with Compal SDX12 WWAN module with ID:
   usb:v413Cp8217
   usb:v413Cp8218
 * Open terminal Ctrl + Alt + t
 * Try command $ sudo mbimcli -d /dev/cdc-wdm0 -p --compal-query-at-command=AT
 * Output:
   AT
   OK
 * Without the patch it will show
   error: Unknown options --compal-query-at-command=AT

[ Where problems could occur ]

 * It adds new mbim service for supporting Compal module, there is no existing service modification.

 * The mbim relies on transaction task to handle sending AT command to the modem. It will send the command asynchronously, if there is a bug or system issue in GLib, the AT command may not send to modem successfully.

[ Other Info ]

 * Upstream commit: https://gitlab.freedesktop.org/mobile-broadband/libmbim/-/commit/c275e4f1422291b933464880c37bd9cfd14b5bca

[Kai-Chuan Hsieh (kchsieh)]

Upload debdiff of 24.04

[Sebastien Bacher (seb128)]

Thanks, I've uploaded that version to Oracular first (SRU requirement) then did a ubuntu3.1 which I uploaded to Noble's review queue

[Launchpad Janitor (janitor)]

This bug was fixed in the package libmbim - 1.31.2-0ubuntu4

---------------
libmbim (1.31.2-0ubuntu4) oracular; urgency=medium

  * mbimcli,qmbe: AT over mbim support for Compal module (LP: #2071877)
    d/p/0001-mbimcli-qmbe-add-qmbe-mbim-service-and-cid-1-to-send.patch

 -- Kai-Chuan Hsieh <email address hidden> Fri, 28 Jun 2024 14:47:00 +0800

[Robie Basak (racb)]

What's the user impact here please? Does this hardware not work at all in Noble? Just in specific regions? Or in some other specific circumstances?

> * Install Compal's WWAN services which is maintained in https://github.com/palcomwireless/linux_pkgs

Is this external software required? If so, then why must we modify Ubuntu to support this, instead of also supplying the software changes required from external sources? If Ubuntu in itself is being enabled in some way to support this hardware, then I'd expect the test plan to function exclusively from Ubuntu's default software sources. It is not a hardware enablement in Ubuntu to still require software from outside Ubuntu to make it work. Please explain.

> * The service can finish FCC unlock with patched libmbim successfully after system boot up

What does this mean? How are you determining this? What steps is someone following the Test Plan supposed to follow?

> * The Modem can work with Internet access after valid SIM is inserted

Please be more specific about what the tester should to to verify this. For example, "Access https://www.google.com/ in Firefox and verify it loads as expected" would be fine. Or if you think that just pinging an IP address successfully is sufficient, then maybe that's fine. But please be specific, so that if there is a regression then we will later be able to consider what the QA process actually was.

[Robie Basak (racb)]

As discussed elsewhere, we need the full hardware enablement to be completed in Oracular first, and then presented for SRU all together please. The user impact needs to be presented in a form that an actual user would recognise, and the test plan needs adjusting to validate that full story.