Jetson AGX Xavier USB 3.0 ports are not enabled after boot from Yocto core-image-minimal

[neil30]

After carefully building and flashing the core-image-minimal from the (sort of) blessed yocto database Yocto Project on NVIDIA Jetson AGX Xavier - KOAN (koansoftware.com) I find that my USB-connected peripherals (keyboard and mouse) are not working. Some investigation revealed that the ports are not even enabled and deliver no power at all to the peripherals. A review of the kernel image, dmesg output and kernel configuration suggest that everything is in place for these ports to be active. I am using the dunfell branch and am quite puzzled and looking for guidance. Can anyone help? Thanks in advance

[DaneLLL]

Hi,
Probably some nodes are missing in rootfs and the firmware is not loaded. You may check if this print is in dmesg:

[    9.426971] tegra-xusb 3610000.xhci: Firmware timestamp: 2020-09-11 16:55:03UTC, Version: 60.09 release

For information, do you use Jetpack 4 or 5?

[neil30]

Thanks for your response, in my dmesg log I see nothing indicating the firmware for tegra-xusb I just see the following

[ 4.403227] tegra-xusb 3610000.xhci: USB2 port 0 has OTG_CAP
[ 4.403233] tegra-xusb 3610000.xhci: USB3 port 2 has OTG_CAP
[ 6.975462] tegra-xusb 3610000.xhci: USB2 port 0 has OTG_CAP
[ 6.975465] tegra-xusb 3610000.xhci: USB3 port 2 has OTG_CAP
[ 7.246160] tegra-xusb 3610000.xhci: USB2 port 0 has OTG_CAP
[ 7.246162] tegra-xusb 3610000.xhci: USB3 port 2 has OTG_CAP
[ 7.256734] tegra-xusb 3610000.xhci: USB2 port 0 has OTG_CAP
[ 7.256737] tegra-xusb 3610000.xhci: USB3 port 2 has OTG_CAP
[ 7.370057] tegra-xusb 3610000.xhci: USB2 port 0 has OTG_CAP
[ 7.370059] tegra-xusb 3610000.xhci: USB3 port 2 has OTG_CAP
[ 7.417580] tegra-xusb 3610000.xhci: USB2 port 0 has OTG_CAP
[ 7.417583] tegra-xusb 3610000.xhci: USB3 port 2 has OTG_CAP
[ 7.456450] tegra-xusb 3610000.xhci: USB2 port 0 has OTG_CAP
[ 7.456453] tegra-xusb 3610000.xhci: USB3 port 2 has OTG_CAP
[ 8.277065] tegra-xusb 3610000.xhci: USB2 port 0 has OTG_CAP
[ 8.277291] tegra-xusb 3610000.xhci: USB3 port 2 has OTG_CAP
[ 8.393718] tegra-xusb 3610000.xhci: USB2 port 0 has OTG_CAP
[ 8.394902] tegra-xusb 3610000.xhci: USB3 port 2 has OTG_CAP

Which now looks suspicious…
Something is incomplete in the yocto I guess…the device tree perhaps?
ANy ideas how to resolve this?

[neil30]

It turns out the issue is that I was given a Seeed Studio Jetson AGX Xavier H01 board and NOT an Nvidia Jetson AGX Xavier board. These two boards are similar but different. The different aspect requires use of a special device tree file that is available as a dtb on the Seeed Studio web site. If the resulting yocto-generated image has the Seeed Studio dtb files incorporated into it then the USB-connected devices come alive and work