Enabling DP on the Jetson Orin NX

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

Hi,

I’m currently trying to enable the DisplayPort on the Jetson Orin NX.
We have developed a custom carrier board based on the Jetson Xavier NX in the past, and i’m using the devkit of the Xavier NX.

It’s a bit unclear to me which steps I have to take to get the Orin NX DP running. I’m aware the DP does not work on the xavier NX devkit, but our carrierboard has a working DP solution.

which steps do I have do and which exact files do I need to modify in the source files of the kernel to enable the DP?

Kind regards,
Gerben

2

Hi,

Actually DP is already the default setting in Jetpack for Orin NX configuration.

None the the extra software setting is needed. If DP on your custom board cannot work, you could share you schematic for us to check what is wrong.

3

Hi Wayne,

Thank you for your response. I tried installing the default configuration through the sdkmanager. We did get the system running, but because we use the xavier NX devkit, only the HDMI port outputs the display. Is this possible because the at default the DP++ is enabled?

Could this also be the reason the DP does not output on our custom board? The DP on our custom board has a proven record, as we are using both DP outputs with the Xavier NX.

Do we need to make some modifications on certain pins to force the Orin NX in DisplayPort?

4

Hi,

That is why I asked you to share the schematic. It sounds obviously you didn’t read the design guide or migration document when using a Xavier NX thing on Orin NX/Nano…

Orin does not support dual display. Only one head display is supported…

Your case is that head becomes HDMI on your Xavier design… You could only rework to make it work as DP when running on Orin.

5

Just to be clear, our custom board does not have HDMI. It is a custom configuration with 2 DisplayPort connectors and both display heads are configured as DisplayPort on the Xavier NX.

As stated in the migration guide, the Orin NX has only 1 head, which is in the same pin configuration as DP1 on the Xavier NX SOM.
If the single head on the Orin NX is default configured as DP as you mentioned, the output should display DisplayPort on 1 connector on our custom board.

Another thing, when installing the default configuration through the sdkmanager with the Orin NX installed on the Xavier NX devkit, the HDMI outputs a screen. According the default configuration, this should be DP, thus it should never output HDMI, unless it’s configured as DP++.

6

Hi,

Yes, Xavier NX devkit HDMI port can work because Orin supports DP++. Your xrandr result will clarify that.

7

Ok Thank you. How does the Orin NX identify it is an HDMI cable or a DisplayPort connected to the DP++?

We still can’t get the head to output DisplayPort on our custom carrier. How does the Orin NX determine which display type to output?

8

Hi,

That may not be the reason that DP cannot work on your custom board.

I mean there is no need to dig into this question.

How does the Orin NX identify it is an HDMI cable or a DisplayPort connected to the DP++?

Please share your full dmesg and /var/log/Xorg.0.log from your custom board with DP connected.

9

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