Switching Device Tree for IMX390 on Jetson Orin Nano

Issue Overview

Users are experiencing difficulties when attempting to switch the device tree for the Nvidia Jetson Orin Nano to support the IMX390 camera sensor. The issue arises specifically when users try to modify or port the existing device tree settings from the AGX Orin series to the Orin Nano. Users have reported errors during the setup process, particularly with kernel version 5.10.120-tegra (Jetson_Linux_R35.4.1_aarch64). Symptoms include invalid sensor model IDs and power-related issues when loading kernel modules for compatible cameras, which significantly impacts their ability to utilize the camera hardware effectively.

Possible Causes

• Hardware Incompatibilities or Defects: The IMX390 may not be fully compatible with the Orin Nano’s hardware configuration, leading to recognition issues.
• Software Bugs or Conflicts: The current kernel version may have bugs that affect camera driver compatibility.
• Configuration Errors: Incorrect modifications to the device tree files could lead to improper initialization of the camera sensor.
• Driver Issues: The nv_imx219 driver may not be correctly configured or compatible with the current setup, resulting in probe errors.
• Environmental Factors: Power supply issues could prevent proper initialization of connected sensors.
• User Errors or Misconfigurations: Users may inadvertently make incorrect changes to the device tree or fail to follow proper installation procedures.

Troubleshooting Steps, Solutions & Fixes

1. Verify Kernel Version: Ensure you are using a compatible kernel version for your Jetson Orin Nano that supports the IMX390 sensor.

   • Command: uname -r

2. Check Existing Device Trees:

   • Locate existing device trees for similar sensors (e.g., IMX219 or IMX477) as a basis for modification.
   • Path example: $public_sources/kernel_src/hardware/nvidia/platform/t23x/common/kernel-dts/t234-common-modules/tegra234-camera-imx390-a00.dtsi.

3. Modify Device Tree:

   • Copy relevant sections from the AGX Orin device tree and adapt them for use with the Orin Nano.
   • Place modified files in: hardware/nvidia/platform/t23x/p3768/kernel-dts/.

4. Load Kernel Modules:

   • Ensure that you are loading the correct kernel module for your camera using:

     sudo insmod nv_imx219.ko
     

   • Monitor kernel logs for errors using:

     dmesg | grep imx
     

5. Inspect Error Messages:

   • Pay attention to specific error messages such as "invalid sensor model id" and "unable to request reset_gpio".
   • These messages can guide further troubleshooting efforts.

6. Consult Documentation:

   • Refer to "Sensor Software Driver Programming" documentation for implementation details and troubleshooting tips.

7. Test Power Supply:

   • Verify that your power supply meets the required specifications (e.g., 5V-2A for Nano).
   • Check connections and ensure proper voltage levels are maintained.

8. Recovery Mode Setup:

   • If issues persist, consider placing the board in recovery mode and re-flashing using SDK Manager:

     sudo reboot --force forced-recovery
     

   • Ensure all connections are secure during this process.

9. Community Support:

   • Engage with community forums or Discord channels dedicated to Nvidia Jetson development for additional insights and shared experiences.

10. Document Modifications:

    • Keep a log of any changes made to configuration files or device trees, which can assist in troubleshooting if issues arise later.

11. Recommended Approach:

    • If multiple users report success with a particular solution, such as using an existing device tree as a base, prioritize this method in your troubleshooting efforts.

By following these steps, users should be able to diagnose and potentially resolve issues related to switching device trees on their Jetson Orin Nano while ensuring compatibility with the IMX390 camera sensor. Further investigation may be necessary if problems persist after these attempts.