Modem Manager bring up

Wed Feb 9 00:05:33 UTC 2022

Hi Aleksander,

After integrating the mhi drivers, wwan framework loaded the drivers and it
is up and running. However, ModemManager is not able to detect the modem.
Any hint/help is appreciated. Please throw some lights.

*Note*: qmicli is working fine and the modem manager is built with
--without-udev support.

Thanks,
SK

# qmicli -d /dev/wwan0qmi0 --dms-get-manufacturer
[/dev/wwan0qmi0] Device manufacturer retrieved:
        Manufacturer: 'QUALCOMM INCORPORATED'
#

# ModemManager --debug --test-plugin-dir=/lib/
ModemManager[1367]: <info>  [000002160.912487] ModemManager (version
1.18.4) starting in system bus...
ModemManager[1367]: <debug> [000002160.912729] [charsets] detecting
platform iconv() support...
ModemManager[1367]: <debug> [000002160.912864] [charsets]   UTF-8: iconv
conversion to/from charset is supported
ModemManager[1367]: <debug> [000002160.912911] [charsets]   UCS-2BE: iconv
conversion to/from charset is supported
ModemManager[1367]: <debug> [000002160.912952] [charsets]   ASCII: iconv
conversion to/from charset is supported
ModemManager[1367]: <debug> [000002160.913065] [charsets]   ISO8859-1:
iconv conversion to charset not supported
ModemManager[1367]: <debug> [000002160.913102] [charsets]   CP437: iconv
conversion to charset not supported
ModemManager[1367]: <debug> [000002160.913136] [charsets]   CP850: iconv
conversion to charset not supported
ModemManager[1367]: <debug> [000002160.913169] [charsets]   UTF-16BE: iconv
conversion to charset not supported
ModemManager[1367]: <debug> [000002160.916497] bus acquired, creating
manager...
ModemManager[1367]: <debug> [000002160.932536] [auth-provider] singleton
created
ModemManager[1367]: <debug> [000002160.933034] [filter] created
ModemManager[1367]: <debug> [000002160.933130] [filter]   explicit
whitelist:         yes
ModemManager[1367]: <debug> [000002160.933156] [filter]   explicit
blacklist:         yes
ModemManager[1367]: <debug> [000002160.933180] [filter]   plugin whitelist:
          yes
ModemManager[1367]: <debug> [000002160.933204] [filter]   qrtr devices
allowed:       yes
ModemManager[1367]: <debug> [000002160.933228] [filter]   virtual devices
forbidden:  yes
ModemManager[1367]: <debug> [000002160.933252] [filter]   net devices
allowed:        yes
ModemManager[1367]: <debug> [000002160.933276] [filter]   usbmisc devices
allowed:    yes
ModemManager[1367]: <debug> [000002160.933300] [filter]   rpmsg devices
allowed:      yes
ModemManager[1367]: <debug> [000002160.933323] [filter]   wwan devices
allowed:       yes
ModemManager[1367]: <debug> [000002160.933346] [filter]   tty devices:
ModemManager[1367]: <debug> [000002160.933369] [filter]       platform
driver check:    yes
ModemManager[1367]: <debug> [000002160.933396] [filter]       driver check:
            yes
ModemManager[1367]: <debug> [000002160.933420] [filter]       cdc-acm
interface check:  yes
ModemManager[1367]: <debug> [000002160.933443] [filter]       with net
check:           yes
ModemManager[1367]: <debug> [000002160.933467] [filter]       default:
             forbidden
ModemManager[1367]: <debug> [000002160.933566] [plugin-manager] looking for
plugins in '/lib/'
ModemManager[1367]: <debug> [000002160.959481] [plugin-manager] loaded
plugin 'qcom-soc' from '/lib//libmm-plugin-qcom-soc.so'
ModemManager[1367]: <debug> [000002160.959613] [filter] registered plugin
whitelist tag: ID_MM_QCOM_SOC
ModemManager[1367]: <debug> [000002160.960085] [plugin-manager] loaded
plugin 'generic' from '/lib//libmm-plugin-generic.so'
ModemManager[1367]: <debug> [000002160.960500] [plugin-manager]
successfully loaded 2 plugins registering 6 subsystems: wwan, rpmsg, net,
qrtr, tty, usbmisc
ModemManager[1367]: <debug> [000002160.961432] service name
'org.freedesktop.ModemManager1' was acquired

On Tue, Feb 8, 2022 at 3:43 PM Senthil Kumaresan <sekumarejobs at gmail.com>
wrote:

> Hi Aleksander,
>
> I did backport the Linux-5.15 MHI driver and WWAN drivers to Linux-4.19
> (My kernel) and it seems the control port interfaces were created after I
> loaded the wwan.ko & mhi_wwan_ctrl.ko drivers.
> I am expecting now that the ModemManager will be up. Let me try.
>
> # ls -l /dev/wwan0*
> wwan0mbim0  wwan0qcdm0  wwan0qmi0
>
> Thanks,
> SK
>
> On Tue, Feb 8, 2022 at 10:40 AM Senthil Kumaresan <sekumarejobs at gmail.com>
> wrote:
>
>> Hi Aleksander,
>>
>> Thanks for your support. I am trying to backport the WWAN system for my
>> kernel.
>> Just a thought.  Is there any possibility that we make the modem manager
>> know that there is no WWAN subsystem rather than use "/dev/mhi0_QMI"  to
>> detect the modem?
>>
>> Thanks,
>> Senthil
>>
>> On Mon, Feb 7, 2022 at 2:49 PM Senthil Kumaresan <sekumarejobs at gmail.com>
>> wrote:
>>
>>> Hi Aleksander,
>>>
>>> Ok. Anyway, I am backporting the last mhi driver from Linux 5.15 to
>>> 4.19. I have compiled the driver successfully and loaded it to the target.
>>> The /dev/wwan0qmi0 is not there, because I did not take the
>>> drivers/net/wwan directory. I need to take them and rebuild and see whether
>>> the ModemManager is coming up or not.
>>>
>>> Thanks,
>>> Senthil
>>>
>>> On Mon, Feb 7, 2022 at 2:42 PM Aleksander Morgado <
>>> aleksander at aleksander.es> wrote:
>>>
>>>> Hey!
>>>>
>>>>
>>>>> I did use the following driver that you have shared earlier. Is that
>>>>> below not the correct one ? I have copied the below into my kernel which is
>>>>> 4.19.
>>>>>
>>>>> ttps://github.com/kristrev/mhi-for-kernel-4.14
>>>>> <https://github.com/kristrev/mhi-for-kernel-4.14>
>>>>>
>>>>>
>>>> Oh, really? Does this mean that 4.14 backport doesn't have the WWAN
>>>> subsystem support? I truly believed it would have had it, or so I was told
>>>> by some dev team that had tested it. Sorry if that's not the case :/ If so,
>>>> it would mean the backport from that repo isn't usable for MM. I have my
>>>> own patch-by-patch backport to 5.4 including the wwan subsystem, but
>>>> haven't tried to go back further yet, not sure how complex that would be to
>>>> include everything for 4.14.
>>>>
>>>> Not sure if I'm missing something, but I definitely wouldn't have
>>>> expected the mhi0_QMI port name.
>>>>
>>>> --
>>>> Aleksander
>>>> https://aleksander.es
>>>>
>>>
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