PCIE SI measurement

Hi,

We are trying to measure PCIE signal and the signal doesn’t output.

From document: Jetson_Xavier_NX_Tuning_and_Compliance_Guide_Application_Note_DA-09890-001_v1.2, there’s a patch to enable PCIE root port always.

On Jetson Nano platform, the behavior is similar to Xavier: When there’s no device under PCIE root port, the root port is disabled.

However, we can’t find information to always enable root port for SI check in document: Jetson_Nano_Interface_Tuning_Complaince_Guide_Application_Note_v1.1.

Would you please teach us to enable the root port when no device connected?

Thanks.

Wayne