Re: [PROBLEM] bus: mhi: host: pci_generic: SDX24 Channels

[Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>]

On Mon, Jul 08, 2024 at 12:57:06PM +0300, Murithi Borona wrote:
> Here's the sub-vendor/device ids.
> 
> Slot:   0003:00:00.0
> Class:  PCI bridge
> Vendor: MEDIATEK Corp.
> Device: Device 7988
> Rev:    01
> ProgIf: 00
> 
> Slot:   0003:01:00.0
> Class:  Unassigned class [ff00]
> Vendor: Qualcomm Technologies, Inc
> Device: SDX24 [Snapdragon X24 4G]
> SVendor:        Qualcomm Technologies, Inc
> SDevice:        SDX24 [Snapdragon X24 4G]
> ProgIf: 00
> 
> Duke,
> 
> If it helps this is the modem firmware/config as seen by ModemManager.
> 
> manufacturer: quectel
> model: EM120R_GL
> firmware revision: EM120RGLAPR02A07M4G
> carrier config: ROW_Commercial
> config revision: 08010809
> h/w revision: EM120R_GL
> 
> Full Firmware Version: M120RGLAPR02A07M4G_10.010.10.010
> 

Duke Xin, do you have any idea about this issue?

- Mani

> On Mon, 8 Jul 2024 at 11:21, Manivannan Sadhasivam
> <manivannan.sadhasivam@linaro.org> wrote:
> >
> > + Duke Xin (who is adding Quectel modem support these days)
> >
> > On Sun, Jul 07, 2024 at 08:23:57PM +0300, Murithi Borona wrote:
> > > Hello,
> > >
> > > Module: Quectel EM120R-GL
> > >
> > > This module does not appear to work fully with the default SDX24 configuration.
> > > It appears to be another variant of the EM120R-GL (Also FCC-Locked by default).
> > >
> > > Issues:
> > > - Debug ports are missing (AT)
> > > - It only works over MBIM/QMI with Qualcomm's RMNET driver.
> > > - In QMI mode it's really unstable and unpredictable with the QMI port
> > > freezing up.
> > >
> > > Are there any missing channels in the SDX24 config or is this a hw/vendor issue.
> > > When using Quectel's drivers (and blacklisting mhi_pci_generic), all
> > > the ports are available.
> > > The configuration for other variants of the same module brings up the
> > > AT port ( with a recurring warning/error).
> > >
> >
> > Most likely this device is a derivative product that needs a different
> > configuration than EM120R-GL. Could you please share the sub-vendor/device ids?
> > You can just share the output of 'lspci -vmm' command.
> >
> > Duke Xin: Are you aware of such derivative product?
> >
> > - Mani
> >
> > > >> [ 5074.472791] sequence number glitch prev=1 curr=0
> > >
> > >
> > > mhi_qcom_sdx24_info
> > > ==================
> > >
> > > lspci: 0003:01:00.0 Unassigned class [ff00]: Qualcomm Technologies,
> > > Inc SDX24 [Snapdragon X24 4G] [17cb:0304]
> > >
> > > ports: mhi_hwip0 (net), mhi_swip0 (net), wwan2mbim0 (mbim), wwan2qcdm0
> > > (ignored), wwan2qmi0 (qmi)
> > >
> > >
> > > mhi_quectel_em1xx_info
> > > ===================
> > >
> > > lspci: 0003:01:00.0 Unassigned class [ff00]: Qualcomm Technologies,
> > > Inc SDX24 [Snapdragon X24 4G] [17cb:0304]
> > >
> > > ports: wwan0 (net), wwan0at0 (at), wwan0mbim0 (mbim), wwan0qcdm0 (ignored)
> >
> > --
> > மணிவண்ணன் சதாசிவம்

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