Our custom board has a physical HDMI interface, but when we use xrandr, the output mode shows as DP. We have applied the following patch to make the change, but we encountered an issue where the system cannot shut down properly. Could you please help us verify if the patch is correct and guide us on how to properly configure HDMI output?
Enveriment：
Model: Jetson AGX Orin Developer Kit - Jetpack 5.1.2 [L4T 35.4.1]
NV Power Mode[0]: MAXN
Hardware:
- P-Number: p3701-0005
- Module: NVIDIA Jetson AGX Orin (64GB ram)
- Platform:
- Distribution: Ubuntu 20.04 Focal Fossa
Release: 5.10.120-rt70-tegra
- Distribution: Ubuntu 20.04 Focal Fossa
The patch we modified is as follows:
DP_MODIFY_HMDI.txt (30.2 KB)
*** Please note that this reply is generated by LLM automatically ***
Based on the provided context, it appears that you are experiencing issues with configuring HDMI output on your custom Jetson AGX Orin board. The patch you applied seems to be related to changing the display function between DP and HDMI.
To verify the correctness of the patch and guide you on properly configuring HDMI output, I’ll provide some general information and steps to follow.
Understanding the Display Configuration
The Jetson AGX Orin module has a built-in display controller that supports both HDMI and DisplayPort (DP) interfaces. The display configuration is controlled by the device tree blob (DTB) and the kernel drivers.
Common Display Configurations
The common display configurations for all platforms, including Jetson AGX Orin, involve setting the HDMI or DP screen resolution. This can be done by updating the DTB file and configuring the kernel drivers accordingly.
Orin Specific Display Configuration
For Orin-specific display configuration, you need to update the DCB blob for custom carrier boards. This involves modifying the device tree source (DTS) file to reflect the changes in your custom board design.
Changing the Display Function Between DP and HDMI
To change the display function between DP and HDMI, you need to update the DTS file and recompile the DTB. The patch you applied might be related to this step.
Verifying the Patch
To verify the correctness of the patch, you can compare it with the official NVIDIA documentation and the Jetson AGX Orin device tree source files. You can also try to apply the patch manually and see if it resolves the issue.
Configuring HDMI Output
To properly configure HDMI output on your custom board, follow these steps:
- Update the DTS file to reflect the changes in your custom board design.
- Recompile the DTB file using the updated DTS file.
- Update the kernel drivers to support HDMI output.
- Configure the HDMI output settings in the kernel drivers.
- Verify that the HDMI output is working correctly.
Troubleshooting
If you encounter issues with shutting down the system properly after applying the patch, you can try the following:
- Check the kernel logs for any error messages related to the display configuration.
- Verify that the DTB file is updated correctly and the kernel drivers are configured properly.
- Try to disable the DP interface and see if the HDMI output works correctly.
Comparison with Other Issues
Based on the provided context, it appears that there are similar issues reported by other users, such as “ORIN NX unable to use HDMI display” and “HDMI 2.0/2.1 ‘No Signal’ Issue After TV Power Cycle”. These issues might be related to the display configuration and kernel drivers.
In summary, to properly configure HDMI output on your custom Jetson AGX Orin board, you need to update the DTS file, recompile the DTB, and configure the kernel drivers accordingly. You should also verify the correctness of the patch and troubleshoot any issues that arise during the configuration process.
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