We are working with one of our customized board based on Jetson Xavier AGX with customized BSP (Based on L4T 32.4.3).
We have USB3.1 on UPHY_RX/TX lines say port1 and a USB 2 hub on USB3_N/USB3_P line and we are having 2 USB buses there say port2.
We observe below scenario of USB devices connected to Port2 on the board will continuously getting reset.
Here are the steps when we get the device on port2 gets reset:
1)Connect USB device such as keyboard to USB port1 with a USB hub – connected mouse and keyboard
2)Connect USB device such as passmark loopback to one of the ports on port2
3)Device connected to port2 will continually reset
4)Unplug device connected to port1, the device connected to port2 will now initialize correctly.
5)Connect device back to port1, device on port2 will continue to function until it is unplugged.
6)Remove and reconnect the device at same port, no reset. if removed and connected back to the other port on port2 , The next device connected to port2 will reset again until port1 is unplugged.
The reason I have used the passmark device is because it has lights showing that it is resetting, but the USB reset is also visible in dmesg. attached dmesg log for reference.AGX_BSP32.4.3_USB_Trial_Passmark_03042021.txt (230.3 KB) AGX_BSP32.4.3_USB_Trial_Passmark_03042021_2.txt (337.0 KB)
Our design is same as OEM model, only thing is we are not using Type c , instead we are using normal USB.
can you please let me know what needs to be done for this?