Re: LN920: MBIM Bands not shown (MM 1.18.2)

[Daniele Palmas]

Il giorno mar 12 ott 2021 alle ore 14:26 Amol Lad  ha scritto:
>
>
> > Anyway, it would be better also to fix #BND=? management for those
> > setups where qmi is not used.
> >
>
> I've started on this and shall submit a MR in a day or two..
>

Thanks! Meanwhile I'm going to look at the qmi way.

Regards,
Daniele

>
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RE: LN920: MBIM Bands not shown (MM 1.18.2)

[Amol Lad]

> Anyway, it would be better also to fix #BND=? management for those 
> setups where qmi is not used.
>

I've started on this and shall submit a MR in a day or two..

Re: LN920: MBIM Bands not shown (MM 1.18.2)

[Aleksander Morgado]

Hey!

> > LIBQMI_WITH_MBIM_QMUX is enabled in libqmi and qmicli reports ok. It seems 
> > for some reasons modemmanager is not able to read out the bands. Any input 
> > regarding this will be helpful.
> >
>
> Currently Telit mbim plugin uses just AT commands for retrieving
> bands: maybe a possible improvement could be to use the qmi requests
> when supported by the modem and available in the build.

Yes, that would be a fine addition, and possibly not very hard to implement.

> Added on my
> TODO list...
>

The never ending TODO list right? :D

> Anyway, it would be better also to fix #BND=? management for those
> setups where qmi is not used.
>

Yes, I agree

-- 
Aleksander
https://aleksander.es

Re: LN920: MBIM Bands not shown (MM 1.18.2)

[Daniele Palmas]

Il giorno lun 11 ott 2021 alle ore 18:06 Amol Lad  ha scritto:
>
> LIBQMI_WITH_MBIM_QMUX is enabled in libqmi and qmicli reports ok. It seems 
> for some reasons modemmanager is not able to read out the bands. Any input 
> regarding this will be helpful.
>

Currently Telit mbim plugin uses just AT commands for retrieving
bands: maybe a possible improvement could be to use the qmi requests
when supported by the modem and available in the build. Added on my
TODO list...

Anyway, it would be better also to fix #BND=? management for those
setups where qmi is not used.

Regards,
Daniele

>
>
> # qmicli -d /dev/cdc-wdm0 -p --dms-get-band-capabilities
>
> [/dev/cdc-wdm0] Device band capabilities retrieved:
>
> Bands: 'wcdma-2100, wcdma-pcs-1900, wcdma-dcs-1800, wcdma-1700-us, 
> wcdma-850-us, wcdma-800, wcdma-900, wcdma-1700-japan, wcdma-850-japan'
>
> LTE bands: '1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 
> 28, 29, 30, 38, 39, 40, 41, 42, 43'
>
> LTE bands (extended): '1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 
> 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 42, 43, 48, 66, 71'
>
>
>
> Thanks
>
> Amol
>
>
>
> From: Amol Lad
> Sent: Monday, 11 October 2021 6:34 PM
> To: 'Daniele Palmas' ; 'ModemManager (development)' 
> 
> Subject: LN920: MBIM Bands not shown (MM 1.18.2)
>
>
>
> Hi Daniele,
>
>
>
> I’m patched my MM 1.18.2 with your MR (LN920 Initial Support) and testing 
> LN920 in MBIM mode. I’m noticing that the “supported” and “current” bands are 
> not shown in “mmcli -m 0” output and below error is seen in the logs:
>
>
>
>   [modem0] couldn't load supported bands: Could not find 4G band flags 
> from response
>
>
>
> Any suggestion what could be going wrong?
>
>
>
> mmcli -m 0 output in both MBIM and QMI is below:
>
>
>
>
>
> MBIM
>
> 
>
>
>
> # mmcli -m 0
>
>   --
>
>   General  |   path: /org/freedesktop/ModemManager1/Modem/0
>
>|  device id: 168c2aa5755860bee3694899a635af0df25e7fcf
>
>   --
>
>   Hardware |   manufacturer: Telit Wireless Solutions
>
>|  model: LN920
>
>|  firmware revision: SDX12.LE.1.0-00085-NBOOT.NEFS.
>
>| carrier config: default
>
>|   h/w revision: LN920A12-WW
>
>|  supported: gsm-umts, lte
>
>|current: gsm-umts, lte
>
>|   equipment id: 354175759991229
>
>   --
>
>   System   | device: 
> /sys/devices/platform/soc/soc:internal-regs/f10f.usb3/usb2/2-1
>
>|drivers: cdc_mbim, option1
>
>| plugin: telit
>
>|   primary port: cdc-wdm0
>
>|  ports: cdc-wdm0 (mbim), ttyUSB0 (ignored), 
> ttyUSB1 (gps),
>
>| ttyUSB2 (at), ttyUSB3 (at), ttyUSB4 
> (ignored), wwan0 (net)
>
>   --
>
>   Numbers  |own: 9108813566
>
>   --
>
>   Status   | unlock retries: sim-pin2 (3)
>
>|  state: connected
>
>|power state: on
>
>|access tech: lte
>
>| signal quality: 12% (recent)
>
>   --
>
>   Modes|  supported: allowed: 3g; preferred: none
>
>| allowed: 4g; preferred: none
>
>| allowed: 3g, 4g; preferred: none
>
>|current: allowed: 4g; preferred: none
>
>   --
>
>   IP   |  supported: ipv4, ipv6, ipv4v6
>
>   --
>
>   3GPP |   imei: 354175759991229
>
>|  enabled locks: fixed-dialing
>
>|operator id: 40445
>
>|  operator name: airtel
>
>|   registration: home
>
>   --
>
>   3GPP EPS |   ue mode of operation: csps-2
>
>|initial bearer path: /org/freedesktop/ModemManager1/Bearer/0
>
>| initial bearer ip type: ipv4v6
>
>   --
>
>   SIM  |   primary sim path: /org/freedesktop/ModemManager1/SIM/0
>
>| sim slot paths: slot 1: 
> /org/freedesktop/ModemManager1/SIM/0 (active)
>
>| slot 2: 
> /org/freedesktop/ModemManager1/SIM/1
>
>   --
>
>   Bearer   |  paths: /org/freedesktop/ModemManager1/Bearer/1
>
>
>
>
>
> QMI
>
> ---
>
>
>
>   --
>
>   General  |   path: /org/freedesktop/ModemManager1/Modem/0
>
>|  device id: