Usb3.0 port of Jetson Orin Nano Devkit

Issue Overview

Users have reported issues with the USB 3.0 ports on the Nvidia Jetson Orin Nano Dev Kit, particularly after upgrading to Jetpack 6.0DP. The main symptoms include:

• Non-functioning USB 3.0 Ports: After flashing the device, users find that USB 3.0 does not operate as expected, with no output voltage from the ports.
• Device Tree Not Updating: Users have noted that the device tree fails to update correctly post-flashing, which is crucial for enabling USB functionality.
• Context of Issue: This problem primarily occurs during setup or after a software update, specifically when transitioning from Jetpack 5 to Jetpack 6.
• Hardware and Software Specifications: The issue has been observed with various configurations, particularly when using Jetpack 6.0DP and modifying device tree files located in Linux_for_Tegra/source/hardware/nvidia/t23x/nv-public/tegra234-p3768-0000.dtsi.
• Frequency: The problem appears to be consistent among users who have upgraded to Jetpack 6.0DP.
• Impact: This issue significantly hampers user experience as it renders USB-connected devices unusable, affecting development and testing workflows.

Possible Causes

The potential causes for the USB 3.0 issues on the Jetson Orin Nano Dev Kit include:

• Hardware Incompatibilities or Defects: Issues with the physical USB ports or internal connections may prevent proper functionality.
• Software Bugs or Conflicts: As users are dealing with a developer preview version of Jetpack, there may be unresolved bugs affecting USB functionality.
• Configuration Errors: Incorrect modifications made to the device tree files can lead to improper USB initialization.
• Driver Issues: Outdated or incompatible drivers may not support the new configurations introduced in Jetpack 6.0DP.
• Environmental Factors: Power supply inconsistencies or overheating components could contribute to USB malfunctions.
• User Errors or Misconfigurations: Users may inadvertently misconfigure settings during setup or flashing processes.

Troubleshooting Steps, Solutions & Fixes

To address the USB 3.0 issues on the Jetson Orin Nano Dev Kit, follow these troubleshooting steps:

1. Verify Device Tree Configuration:

   • Check if the device tree has been updated correctly after flashing.
   • Navigate to the directory:

     cd Linux_for_Tegra/source/hardware/nvidia/t23x/nv-public/
     

   • Ensure that modifications made in tegra234-p3768-0000.dtsi are properly reflected in the generated .dtb files.

2. Revert to Previous Jetpack Version:

   • If issues persist, consider downgrading back to Jetpack 5, which has proven more stable for some users.

3. Rebuild Device Tree Files:

   • Use the following commands to rebuild and transfer modified device tree files:

     ./nvbuild.sh -o $PWD/kernel_out
     sudo cp -rf kernel_out/arch/arm64/boot/dts/nvidia/* /home/microtnt/nvidia/Linux_for_Tegra/kernel/dtb/
     

4. Check for Phandle Existence:

   • Verify if the phandle exists in the generated .dtb file under kernel_out. If not present, investigate further into your modifications.

5. Monitor System Logs:

   • Use dmesg to monitor logs for any error messages related to USB during boot and when connecting devices:

     dmesg --follow
     

6. Inspect Power Supply and Connections:

   • Check voltages at relevant pins of components like AP22811AW5-7 (e.g., ensure output voltage is present).
   • Ensure that power supply connections are stable and within specifications.

7. Consult Documentation and Community Forums:

   • Refer to Nvidia’s official documentation for guidance on device tree modifications and updates.
   • Engage with community forums for shared experiences and solutions.

8. Best Practices for Future Prevention:

   • Always back up current configurations before making changes.
   • Test new updates in a controlled environment before implementing them in production setups.

9. Recommended Approach:

   • Many users have successfully resolved similar issues by reverting back to Jetpack 5 until stable updates for Jetpack 6 are released.

By following these steps, users should be able to diagnose and potentially resolve issues related to USB 3.0 functionality on their Nvidia Jetson Orin Nano Dev Kit. Further investigation may be required if problems persist despite these efforts.