Hey Mani, > > [ 7.189547] mhi mhi0: Transitioning from PM state: Linkdown or > > Error Fatal Detect to: SYS ERROR Process > > Hmm, I think the use of sync_power_up might be causing the issue here as it > forces the MHI state to fatal error. > > Ignore the previous diff and try the below one: > > diff --git a/drivers/bus/mhi/pci_generic.c b/drivers/bus/mhi/pci_generic.c > index 59a4896a8030..b1e8c7de4e54 100644 > --- a/drivers/bus/mhi/pci_generic.c > +++ b/drivers/bus/mhi/pci_generic.c > @@ -637,7 +637,7 @@ static void mhi_pci_recovery_work(struct work_struct *work) > if (err) > goto err_try_reset; > > - err = mhi_sync_power_up(mhi_cntrl); > + err = mhi_async_power_up(mhi_cntrl); > if (err) > goto err_unprepare; > Same thing I think, see the logs below: root@OpenWrt:~# dmesg | grep -E "mhi|pci" [ 0.099139] brcm-pcie fd500000.pcie: host bridge /scb/pcie@7d500000 ranges: [ 0.099163] brcm-pcie fd500000.pcie: No bus range found for /scb/pcie@7d500000, using [bus 00-ff] [ 0.099200] brcm-pcie fd500000.pcie: MEM 0x0600000000..0x0603ffffff -> 0x00f8000000 [ 0.099234] brcm-pcie fd500000.pcie: IB MEM 0x0000000000..0x00bfffffff -> 0x0000000000 [ 0.145977] brcm-pcie fd500000.pcie: link up, 5 GT/s x1 (SSC) [ 0.146136] brcm-pcie fd500000.pcie: PCI host bridge to bus 0000:00 [ 0.146155] pci_bus 0000:00: root bus resource [bus 00-ff] [ 0.146173] pci_bus 0000:00: root bus resource [mem 0x600000000-0x603ffffff] (bus address [0xf8000000-0xfbffffff]) [ 0.146214] pci 0000:00:00.0: [14e4:2711] type 01 class 0x060400 [ 0.146305] pci 0000:00:00.0: PME# supported from D0 D3hot [ 0.149482] pci 0000:00:00.0: bridge configuration invalid ([bus ff-ff]), reconfiguring [ 0.149605] pci 0000:01:00.0: [17cb:0306] type 00 class 0xff0000 [ 0.149667] pci 0000:01:00.0: reg 0x10: [mem 0x00000000-0x00000fff 64bit] [ 0.149698] pci 0000:01:00.0: reg 0x18: [mem 0x00000000-0x00000fff 64bit] [ 0.149856] pci 0000:01:00.0: PME# supported from D0 D3hot D3cold [ 0.149906] pci 0000:01:00.0: 4.000 Gb/s available PCIe bandwidth, limited by 5 GT/s x1 link at 0000:00:00.0 (capable of 31.506 Gb/s with 16 GT/s x2 link) [ 0.152957] pci_bus 0000:01: busn_res: [bus 01-ff] end is updated to 01 [ 0.152995] pci 0000:00:00.0: BAR 8: assigned [mem 0x600000000-0x6000fffff] [ 0.153017] pci 0000:01:00.0: BAR 0: assigned [mem 0x600000000-0x600000fff 64bit] [ 0.153047] pci 0000:01:00.0: BAR 2: assigned [mem 0x600001000-0x600001fff 64bit] [ 0.153077] pci 0000:00:00.0: PCI bridge to [bus 01] [ 0.153092] pci 0000:00:00.0: bridge window [mem 0x600000000-0x6000fffff] [ 0.153237] pcieport 0000:00:00.0: enabling device (0000 -> 0002) [ 0.153354] pcieport 0000:00:00.0: PME: Signaling with IRQ 38 [ 0.153579] pcieport 0000:00:00.0: AER: enabled with IRQ 38 [ 7.068355] mhi-pci-generic 0000:01:00.0: MHI PCI device found: sierra-em919x [ 7.075535] mhi-pci-generic 0000:01:00.0: BAR 0: assigned [mem 0x600000000-0x600000fff 64bit] [ 7.084077] mhi-pci-generic 0000:01:00.0: enabling device (0000 -> 0002) [ 7.090865] mhi-pci-generic 0000:01:00.0: using shared MSI [ 7.096975] mhi mhi0: Requested to power ON [ 7.101275] mhi mhi0: Attempting power on with EE: PASS THROUGH, state: SYS ERROR [ 7.143799] mhi mhi0: local ee: INVALID_EE state: RESET device ee: PASS THROUGH state: SYS ERROR [ 7.152590] mhi mhi0: System error detected [ 7.156796] mhi-pci-generic 0000:01:00.0: firmware crashed (7) [ 7.162671] mhi mhi0: Power on setup success [ 7.166957] mhi mhi0: Handling state transition: SYS ERROR [ 7.172442] mhi mhi0: Transitioning from PM state: Linkdown or Error Fatal Detect to: SYS ERROR Process [ 7.181832] mhi-pci-generic 0000:01:00.0: firmware crashed (6) [ 7.187661] mhi mhi0: Failed to transition from PM state: Linkdown or Error Fatal Detect to: SYS ERROR Process [ 7.197659] mhi mhi0: Exiting with PM state: Linkdown or Error Fatal Detect, MHI state: RESET [ 7.206180] mhi mhi0: Handling state transition: PBL [ 7.211140] mhi mhi0: Device MHI is not in valid state [ 7.216273] mhi mhi0: Handling state transition: DISABLE [ 7.221580] mhi mhi0: Processing disable transition with PM state: Linkdown or Error Fatal Detect [ 7.230449] mhi mhi0: Waiting for all pending event ring processing to complete [ 7.237762] mhi mhi0: Waiting for all pending threads to complete [ 7.243851] mhi mhi0: Reset all active channels and remove MHI devices [ 7.250374] mhi mhi0: Resetting EV CTXT and CMD CTXT [ 7.255335] mhi mhi0: Exiting with PM state: DISABLE, MHI state: RESET [ 7.261895] mhi-pci-generic 0000:01:00.0: failed to power up MHI controller [ 7.269057] mhi-pci-generic: probe of 0000:01:00.0 failed with error -110 -- Aleksander https://aleksander.es
