tbang

I found the reason. (Different function of Pin 100) cm5-io: PCIe_PWR_EN rpi-cm4-io: nEXTRST used for USB hub reset With rpi-cm4-io and no pcie device, linux sets PCIe_PWR_EN=0 (turn off pcie) But rpi-cm4-io thinks that nEXTRST=0 (always reset usb hub) The temporary solution is: For the pause of compile, please turn on kernel config When kernel config appears, sudo vi ./cache/sources/linux-kernel-worktree/6.1__rk35xx__arm64/arch/arm64/boot/dts/rockchip/rk3576-armsom-cm5-rpi-cm4-io.dts Add the following fix in order to always turn on pcie vcc3v3_pcie0: vcc3v3-pcie0 { ... regulator-boot-on; regulator-always-on; enable-active-high; ... }; Because "sudo apt dist-upgrade" overwrites .dtb, make sure backup and restore. I do not know how the .dts is generated, so the patch can be made by an expert of Armbian.

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. Please review this problem. Thanks.