They are totally same. What you need to change on rel-35.1 are same as rel-35.3.1.
OK. We will use [tegra234-dcb-p3701-0000-a02-p3737-0000-a01-hdmi-4-ga5.0.2.dtsi] for rel35.3.1.
For now, if you are sure your dcb/dtb/pinmux are all correct, I could only ask you to compare the HDMI schematic with the xavier nx p3509 HDMI part.
I would like to ask if our HW design is correct.
We follow the Design Guide and connect the BUS Lane as follows.
On the other hand, the following user described that after adjusting data lane it solved the problem.
Will the HDMI Output work with our design?