How Do I Configure and Use the PCIe RC?

Hi, I would like to ask a question about PCIE RC. In my environment, the AGX Xavier module is used, and the SDK version is 4.4.
The Xavier module functions as the PCIe RC and connects to the PCIe switch demo board. When the Xavier module is powered on, it provides 12V(A2/A3/B1/B2/B3) and 3.3V(A9/A10/B8) power supplies. After the kernel is started, the two power supplies are down, and the PCIe switch cannot be scanned by using the lspci command.
What is the reason for this situation? Is it related to any software configuration?

The power supplies go down only if the PCIe link is not up with the end point (in this case the PCIe switch). Please check why the link is not up. Has this switch been tried with any other root port (Ex:- in an x86 system)?