> > I'm working on a setup using a RPi CM4 based board and a Sierra > > Wireless EM9191 module, running OpenWRT 21.02 and backported mhi+wwan > > drivers (from latest 5.15 rc). The kernel also has the > > mhi_pci_dev_info entry written by Thomas, as per > > https://forum.sierrawireless.com/t/sierra-wireless-airprime-em919x-pcie-support/24927 > > > > The EM9191 is now running 02.08.01.00 (latest firmware from Sierra), > > upgraded in several steps back from the original 01.04.01.02 the > > module came with. The firmware upgrades were done with > > qmi-firmware-update and the module in USB mode in a desktop PC. > > > > Most of the system boots end up with the mhi driver reporting that the > > module firmware crashed in different ways: > > > > [ 7.060730] mhi-pci-generic 0000:01:00.0: MHI PCI device found: > > sierra-em919x > > [ 7.067906] mhi-pci-generic 0000:01:00.0: BAR 0: assigned [mem > > 0x600000000-0x600000fff 64bit] > > [ 7.076455] mhi-pci-generic 0000:01:00.0: enabling device (0000 -> > > 0002) > > [ 7.083277] mhi-pci-generic 0000:01:00.0: using shared MSI > > [ 7.089508] mhi mhi0: Requested to power ON > > [ 7.094080] mhi mhi0: Attempting power on with EE: PASS THROUGH, > > state: SYS ERROR > > [ 7.180371] mhi mhi0: local ee: INVALID_EE state: RESET device ee: > > PASS THROUGH state: SYS ERROR > > [ 7.187146] mhi mhi0: Power on setup success > > [ 7.187219] mhi mhi0: Handling state transition: PBL > > [ 7.189165] mhi mhi0: System error detected > > [ 7.189178] mhi mhi0: Device MHI is not in valid state > > [ 7.189189] mhi-pci-generic 0000:01:00.0: firmware crashed (7) > > [ 7.213682] mhi mhi0: Handling state transition: SYS ERROR > > [ 7.219183] mhi mhi0: Transitioning from PM state: Linkdown or > > Error Fatal Detect to: SYS ERROR Process > > [ 7.228590] mhi-pci-generic 0000:01:00.0: firmware crashed (6) > > [ 7.234429] mhi mhi0: Failed to transition from PM state: Linkdown > > or Error Fatal Detect to: SYS ERROR Process > > [ 7.244433] mhi mhi0: Exiting with PM state: Linkdown or Error > > Fatal Detect, MHI state: RESET > > [ 7.252963] mhi mhi0: Handling state transition: DISABLE > > [ 7.258278] mhi mhi0: Processing disable transition with PM state: > > Linkdown or Error Fatal Detect > > [ 7.267155] mhi mhi0: Waiting for all pending event ring processing > > to complete > > [ 7.274480] mhi mhi0: Waiting for all pending threads to complete > > [ 7.280576] mhi mhi0: Reset all active channels and remove MHI > > devices > > [ 7.287110] mhi mhi0: Resetting EV CTXT and CMD CTXT > > [ 7.292077] mhi mhi0: Exiting with PM state: DISABLE, MHI state: > > RESET > > [ 7.298683] mhi-pci-generic 0000:01:00.0: failed to power up MHI > > controller > > [ 7.306184] mhi-pci-generic: probe of 0000:01:00.0 failed with error > > -110 > > > > Some of the boots successfully finish and I can talk to both the QMI > > and MBIM ports exposed by the WWAN subsystem, but the success rate is > > extremely low. > > > > Thomas, are you seeing similar issues in your setup? > > On our setup, using i.MX6DL based board and a PCIe Sierra Wireless > EM9190 module, running Yocto and Linux 5.13, we don't have much success > for the moment, qmi and mbim commands very often end in timeout. > > Otherwise, when responses are received, we also can observe strange > things: unexpected messages, response to previous commands or queue > buffer issue. > Are you testing this with qmicli + mbimcli + ModemManager? And if so, are you running the qmicli/mbimcli commands with the "-p" option in order to always use the intermediate qmi-proxy/mbim-proxy? I'd suggest to always do that to avoid having multiple processes talking to the ports at the same time. > I updated the topic opened on the Sierra Wireless forum, with our > latest progress and as well as additional information. > > In addition, we observed some strange behavior of the EM919x after warm > reboots. > Is the log after the warm reboots similar to the one I showed in my first email, i.e. with the 2 reported "firmware crashes"? Or does it look totally different? And, do you always see the module booting properly on cold boots? Or do you see failed boots like the one i showed in my first email? -- Aleksander https://aleksander.es
