Agx xavier at jetpack5.0.2 can't use USB tethering

Autonomous Machines Jetson & Embedded Systems Jetson AGX Xavier
1

The product based on agx xavier + jetpack 5.0.2, can’t use USB tethering.
the host machine can’t discovery device usb info :“0955:0720 NVIDIA Corp.” by the cmd of lsusb.
at the same time, host and device can’t get their own dhcp ip as 192.168.55.100/1;

I have checked some cases:
1、agx devkit + jp5.0.2, the result of lsusb and ifconfig is ok;
2、The device service of “/opt/nvidia/l4t-usb-device-mode/nv-l4t-usb-device-mode.service” is
enabled and active;
3、check this topic, the driver code of cdc_ether.c and rndis_host.c already have the patch code.
Can’t use USB tethering - Jetson & Embedded Systems / Jetson TX2 - NVIDIA Developer Forums

the atteched file are uart log of product b400 and devkit .
uart_agx_b400.log (72.2 KB)
uart_agx_devkit.log (74.5 KB)

This is one important issue, please give some advice about it.

3

Are you talking about issue happened to your custom carrier board?

4

yes ，This is one issue about our custom carrier board.
The issue happen when host and agx device connect by usb cable.

5

Did you configure the usb configuration in device tree for your custom board?

or you don’t know what I am asking for?

6

The agx product want to update jetpack 5.0.2 which already is developed in jetpack 4.6;
and I encounter this issue.

I have some attempts below:
1、I pick up two patchs which come from the source branch jetpack 4.6; The patch about typec mode switch may be relevant;
2、I check the dtb files of tegra194-p2888-0001-p2822-0000-common.dtsi, but there is some differences from jp4.6 which I can’t recognize the correct value;
3、I check nvidia doc, such as r35.1 “required-device-tree-changes”, but cann’t find effective info.
agx_jp4.6_typec_switch.patch (6.7 KB)
agx_jp4.6_typec_switch2.patch (3.9 KB)
tegra194-fixed-regulator-p2822-1000.dtsi (4.5 KB)
tegra194-p2888-0001-p2822-0000-common.dtsi (10.3 KB)

can you show the other dtb file ?
or you can help to check the atteched files.
thanks in advance.

7

HI,

Actually how the device tree gets written is being changed as kernel version changed a lot.

Please read the document and modify the device tree. You cannot pick up jp4 DT to jp5.

https://docs.nvidia.com/jetson/archives/r35.2.1/DeveloperGuide/text/HR/JetsonModuleAdaptationAndBringUp/JetsonAgxOrinSeries.html?highlight=universal#porting-the-universal-serial-bus

9

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