Hi Rafal:
For you are using EC21, the upstream qmi_wwan driver is enough.
If the EC21's VID and PID is not in the qmi_wwan.c products table, you
just need add it, as next:
{QMI_QUIRK_SET_DTR(0x2c7c, 0x0121, 4)}, /* Quectel EC21 Mini PCIe */
If you are using LTE-A or 5G modules, it is recomment to use MBIM (set
by at+qcfg="usbnet", 2 )
(for these modems, it is recomment or mandatory to use "QMAP" fucntion,
but not well support by the upsream qmi_wwan)
Hi Aleksander:
Quectel has lot of customers, and most of them are use system like
openwrt, android, others embedded -linux.
and the kernel version used is usually is V3.x,V4.x.
it will spend very much time (for quectel-self and customers):
if we appiled patch to the upstream qmi_wwan driver,
and back-port the driver to the customer's kernel.
So we directly povide qmi_wwan_q.c, suitable for ALL kernel versions
(V3.2 and later), the customers just need 'copy + paste' it.
On November 26, 2020 1:22 AM, Aleksander wrote:
> Hey Rafal!
>
> > Jan 1 04:51:00 zubrOS ModemManager[342]: <debug> [000017460.859237]
> [filter] cdc-wdm devices allowed: yes
> > Jan 1 04:51:35 zubrOS kernel: [ 54.178239] qmi_wwan_q 1-1:1.4: cdc-wdm0:
> USB WDM device
>
> I saw your merge request and replied about that there, the problem you had
> with ModemManager not detecting the cdc-wdm port as a QMI port was indeed
> the kernel driver name, "qmi_wwan_q" vs "qmi_wwan":
> https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/merge_re
> quests/406
>
> It's really unfortunate that the vendors try to push their own modified kernel
> drivers, instead of making sure the upstream one is properly up to date to
> support their modules. There should be no reason for that to happen, and we
> shouldn't enforce that approach in ModemManager.
>
> @Carl Yin(殷张成) what is the reason for Quectel to suggest using a custom
> modified "qmi_wwan_q" driver instead of suggesting to use the upstream
> default one? How can we help solve this?
>
> --
> Aleksander
> https://aleksander.es
> _______________________________________________
> ModemManager-devel mailing list
> ModemManager-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
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