[Bug 2071877] [NEW] Support sending AT commnad by mbim-cli for Compal WWAN module

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Kai-Chuan Hsieh (kchsieh):

[ Impact ]

 * Add a service to make mbim-cli be able to send AT command to Compal
WWAN module for FCC unlock

[ Test Plan ]

 * On the platform with Compal SDX12 WWAN module with ID:
   usb:v413Cp8217
   usb:v413Cp8218
 * Install Compal's WWAN services which is maintained in https://github.com/palcomwireless/linux_pkgs
 * The service can finish FCC unlock with patched libmbim successfully after system boot up
 * The Modem can work with Internet access after valid SIM is inserted

[ 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,
and the modem won't work.

[ Other Info ]

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

** Affects: oem-priority
     Importance: Undecided
         Status: New

** Affects: libmbim (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: oem-priority originate-from-2054378 somerville
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Support sending AT commnad by mbim-cli for Compal WWAN module
https://bugs.launchpad.net/bugs/2071877
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