Pcie controller mode change

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Question 1: Jetson AGX Orin (Root point) and FPGA VCU 118 (end point), communicating through a pcie device, how to set Jetson’s controller mode to the desired CX (X: 0~10):

is to make changes to ODMDATA:

Still using this approach:

Is there a difference between these two ways? Which one is easier?

Question 2: Also is there any more detailed documentation explaining about this UPHY Lane Configuration?

[kayccc]

Duplicated with The Jetson AGX Orin Devkit PCIe Configuration - Jetson & Embedded Systems / Jetson AGX Orin - NVIDIA Developer Forums