Quectel EC21-V modem not showing the right registering state

[Dan Williams]

On Mon, 2018-02-12 at 17:07 +0100, Alfonso Sanchez-Beato wrote:
> Hi,
> 
> I found that a Quectel EC21-V modem was not showing the right state.
> This is an LTE-only modem, so the only supported network is EPS, but
> mm-broadband-modem-qmi.c was never calling
> mm_iface_modem_3gpp_update_eps_registration_state(), so the modem
> state never changed. This patch makes MM show the right status:
> 
> https://paste.ubuntu.com/=7Stv2xjCKm/

Good catch.

There's actually one more place to update in
common_process_system_info_3gpp().  That's used if the modem supports
newer QMI commands.  For that I guess you need to cache whether
process_lte_info() returned  TRUE and if so, copy ps_registration_state
into eps_registration_state, then call
mm_iface_modem_3gpp_update_ps_registration_state() with that.

Dan

> But I am not sure if this is the right approach, so I am sending this
> for comments.
> 
> This is what I see with qmiclient:
> 
> $ qmicli -d /dev/cdc-wdm0 --nas-get-serving-system
> [/dev/cdc-wdm0] Successfully got serving system:
>         Registration state: 'registered'
>         CS: 'detached'
>         PS: 'attached'
>         Selected network: '3gpp'
>         Radio interfaces: '1'
>                 [0]: 'lte'
>         Roaming status: 'off'
>         Data service capabilities: '1'
>                 [0]: 'lte'
>         Current PLMN:
>                 MCC: '311'
>                 MNC: '480'
>                 Description: 'V� '
>         Roaming indicators: '1'
>                 [0]: 'off' (lte)
>         3GPP time zone offset: '-300' minutes
>         3GPP daylight saving time adjustment: '0' hours
>         3GPP location area code: '65534'
>         3GPP cell ID: '15769377'
>         Detailed status:
>                 Status: 'available'
>                 Capability: 'ps'
>                 HDR Status: 'none'
>                 HDR Hybrid: 'no'
>                 Forbidden: 'no'
>         LTE tracking area code: '15620'
>         Full operator code info:
>                 MCC: '311'
>                 MNC: '480'
>                 MNC with PCS digit: 'yes'
> 
> Thanks,
> Alfonso
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