Adjusting vdd_gpu Regulator Voltage on Jetson AGX Orin

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Orin
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1

Hello,

I am working on power optimization for my Jetson AGX Orin, and I need to modify the vdd_gpu regulator voltage to achieve a specific power target. However, I am unsure about the correct method to adjust this setting safely.

Could you please provide guidance on:

  1. How to check and modify the vdd_gpu regulator voltage?
  2. Any relevant device tree or sysfs entries that control this parameter?
  3. Whether modifying this voltage requires changes in power profiles (nvpmodel) or kernel configurations?
  4. Potential risks or limitations I should be aware of when making these changes?

I would appreciate any insights or documentation references that could help.

Thanks in advance!

3

Hi,

There is no support and no one ever did that before. I am not sure why you need to modify vdd regulator to achieve specific power target.

4

Hi WayneWWW,
Thank you for your response.

I believe the device can operate at lower power targets than the predefined settings in nvpmodel. In my case, occasional system crashes are not a major concern, as my primary goal is to undervolt or overclock the GPU to optimize performance for my GPU-intensive application.

If you have any suggestions on how to achieve this, I would really appreciate your insights.

Thanks again!

5

As we are using DVFS here, you could just configure the GPU clock to achieve what you need. What I mean here is you should adjust the clock but not adjust the VDD.

Also, everything you do should be still under the spec. Under voltage/over clock are not valid.

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