Armsom cm5, onboard USB hub is disconnected when booting

[tbang]

Hello Dear,

 

After flashing *Armsom-cm5-rpi-cm4-io_*, there is one critical problem.
onboard USB hub always connects and disconnects 2 times when booting.

dmesg outputs:

[ 6.190239] hub 1-1:1.0: USB hub found
…
[ 7.868081] rk-pcie 2a200000.pcie: PCIe Link Fail, LTSSM is 0x3, hw_retries=0
[ 7.868642] usb 1-1: USB disconnect, device number 2
…
[ 9.326443] hub 1-1:1.0: USB hub found
…
[ 11.213062] rk-pcie 2a200000.pcie: PCIe Link Fail, LTSSM is 0x3, hw_retries=1
[ 11.213297] usb 1-1: USB disconnect, device number 4

I have tried with many variations, but the onboard hub is always disconnected.

• server/desktop
• community release/ self build
• several tags from 25.5 to 26.2
• CONFIG_USB_ONBOARD_HUB  O/X
• rpi cm4 io board/ Ochin board

 

However,

• Armsom's official image has no problem with the onboard usb hub.
• CM4-nano-B has no onboard hub, and has no problem with external hub.

So, it seems to be a SW problem.

 

In addition (for information),

I tried custom-build without pcie because hub disconnection happens near pcie.

Kernel menuconfig disables Rockchip PCIe host cont/ Rockchip DesignWare PCIe cont/ Broadcom Wireless Device Drv.

Device Drivers  --->
  [*] PCI support  --->   
    PCI controller drivers  --->
      < > Rockchip PCIe host controller
      DesignWare PCI Core Support  --->
        < > Rockchip DesignWare PCIe controller
...
  [*] Network device support  ---> 
    [*]   Wireless LAN  --->
      <*>   Rockchip Wireless LAN support  --->
        [ ]   Broadcom Wireless Device Driver Support  --->

Then, both pcie and onboard-usb-hub disappear in dmesg even though any usb option is not changed. 

 

Please review this problem.

Thanks.