Technical Support Request: DP Configuration and 1-Lane HBR3 Link Training Issue on THOR T5000 Series

Robotics & Edge Computing Jetson Systems Jetson Thor
1

Dear Technical Support Team,

I am writing to seek your guidance regarding the DisplayPort (DP) configuration on the THOR T5000 series, as we have encountered an issue during our debugging phase.

Issue Description:
The DP interface of the T5000 fails to establish a stable connection with our display equipment when negotiating a DP 1-lane HBR3 configuration during Link Training. We have already verified and confirmed that the display downstream (Sink) device natively supports 1-lane input.

Our Questions:

  1. Verification Method: How can we verify within the T5000 source code whether 1-lane mode operation with a Sink device is fully supported? Could you guide us on which specific source files, drivers, or registers we should check to investigate this?
  2. Software/Code Reference: Is there a software code list, configuration matrix, or reference documentation available that details the supported DP lane counts and link rates (e.g., HBR3, HBR2) within the current SDK/firmware?

We look forward to your professional advice and any technical documentation or code pointers you can provide to help us resolve this issue.

Best regards

5

Hi,

Most of the function here is within the nvidia.ko and nvidia-modeset.ko which could be found in the public source tarball.

However, part of the driver like DCE is pre-built firmware which is not open source one.

6

thank you