Re: Sierra Wireless EM9191 integration issues in mhi+wwan

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

+ Bhaumik

On Thu, Oct 07, 2021 at 03:04:44PM +0200, Aleksander Morgado wrote:
> Hey all,
> 
> 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.
>

Can you share the success log also?

Thanks,
Mani
 
> Thomas, are you seeing similar issues in your setup?
> 
> -- 
> Aleksander
> https://aleksander.es