How to change the output pin to swap R-color and B-color?

Autonomous Machines Jetson & Embedded Systems Jetson AGX Xavier
1

Hi,

There is a difference for HDMI between my customized hardware and Nvidia AGX Xavier kit, and that is the swapping between DP2_TX0 and DP2_TX2.
Because of this difference, the customized hardware can not output HDMI signal to an HDMI monitor, and even a DVI output can work but the R-color is swapped with B-color and the image color is so strange.
For example, an red apple becomes a blue one…

My hardware engineer tried to rework the DP2_TX0 and DP2_TX2 pins by physical wires based on the layout of Xavier kit, and it does be able to fix this issue.
So I want to know if possible to swap these two pin define by software method?

3

Hi,

If the hardware rework is done and cannot fix this issue, then I don’t think you need to try it from software… unless your hardware rework is wrong.

4

Hi @WayneWWW

The hardware rework is just an experiment to validate if the layout mistake is the root cause.

As you mentioned, for a long term solution, the hardware guys must have a fix for this layout mistake, but for the short term workaround to go-on some tests or function validations, software might be another choice if software workaround is possible.

Please help to give me some ideas if software is possible.

5

There is something called xbars-xxx property in the device tree. You can swap the 0 and 2 there.

6

@WayneWWW

I grep the hardware folder, which includes t19x and t23x, by the key ‘xbars’ but nothing found.

7

sorry. No s. Just xbar.

8

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