MGBE MDIO MDC Speed

Robotics & Edge Computing Jetson Systems Jetson AGX Orin
1

Hello, NVIDIA Engineer,
I am debugging the MDIO function in MGBE 5G mode. My MDIO frequency is 1M, but I saw in your post that the fastest possible frequency is 2M.
How should I adjust the device tree to enable MDIO to reach 2M? I did not see any MDIO frequency settings in my device tree search.
MGBE MDIO speed - Jetson & Embedded Systems / Jetson AGX Orin - NVIDIA Developer Forums

2

*** Please note that this reply is generated by LLM automatically ***

I’d be happy to help you with your question!

It appears that you are trying to adjust the MDIO frequency on the Jetson AGX Orin module to reach the fastest possible frequency of 2M. However, you are unable to find any MDIO frequency settings in your device tree.

After reviewing the provided context, I found that there is no explicit information about adjusting the MDIO frequency on the Jetson AGX Orin module. However, I can provide some general guidance on how to approach this issue.

The MDIO (Management Data Input/Output) interface is a serial interface used to manage and configure the Ethernet PHY (Physical Layer) device. The MDIO frequency is typically set by the PHY device itself, and it may not be directly configurable through the device tree.

That being said, you can try checking the following:

  1. PHY device documentation: Check the documentation for the specific PHY device used on the Jetson AGX Orin module to see if it supports a 2M MDIO frequency. You may need to consult the datasheet or user manual for the PHY device.
  2. Device tree configuration: Although you mentioned that you didn’t find any MDIO frequency settings in your device tree, it’s possible that there are other configuration options that may affect the MDIO frequency. You can try searching for keywords like “mdio”, “phy”, “ethernet”, or “network” in your device tree to see if there are any relevant configuration options.
  3. Kernel configuration: The Linux kernel may also have configuration options that affect the MDIO frequency. You can try checking the kernel configuration files (e.g., .config or config.gz) to see if there are any options related to MDIO or PHY configuration.
  4. Contact NVIDIA support: If you are unable to find any information about adjusting the MDIO frequency on the Jetson AGX Orin module, you may want to contact NVIDIA support for further assistance. They may be able to provide more detailed guidance or point you to relevant documentation.

In comparison to other platforms, the Jetson AGX Orin module is a relatively new platform, and it’s possible that the documentation and configuration options may not be as mature as those for other platforms.

I hope this helps, and please let me know if you have any further questions or if there’s anything else I can help you with!

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3

The LLM response was not helpful. Please reply, Engineer.

5

Hi,
Do you use the interface of AGX Orin module? If yes, MDIO clock is set to 2MHz and cannot be changed.

6

Yes, AGX Orin
R36.4.3
But my XFI0_MDIO output is currently 1M. How can I change it to 2M?

8

There is no update from you for a period, assuming this is not an issue anymore.
Hence, we are closing this topic. If need further support, please open a new one.
Thanks ~0910

Is this still an issue to support? Any result can be shared?