Jetson AGX Xavier Pcie(Root) detection of Device needs jetson reboot

I am connecting an FPGA based PCIe Device to Jetson AGX Xavier PCIe slot.

I am facing an issue with device detection.

Device will get detected properly If I comment “nvidia,enable-power-down;” in device-tree file “tegra194-p2888-0000-a00.dtsi”. If it is not-commented I need to reboot my Jetson 2-3 times to see the device got detected in lspci-v.

Can you please help with thhis.

Best Regards,

Prasanna