follow User guide of J721EXSOMXEVM
4.11 PCIe interfaces
4.11.1 X1Lane PCIe Interface
For PCIE EndPoint operation
the board was seted Endpoint,and PCIE link to the Rc point.
After 10 minutes,the board was powered on and printed that:
[ 14.903489] j721e-pcie 2910000.pcie: host bridge /bus@100000/pcie@2910000 ranges:
[ 14.903520] j721e-pcie 2910000.pcie: IO 0x0018001000..0x0018010fff -> 0x0018001000
[ 14.903531] j721e-pcie 2910000.pcie: MEM 0x0018011000..0x001fffffff -> 0x0018011000
[ 14.903538] j721e-pcie 2910000.pcie: Parsing dma-ranges property...
[ 14.903545] j721e-pcie 2910000.pcie: IB MEM 0x0000000000..0xffffffffffff -> 0x0000000000[ 14.903815] j721e-pcie 2910000.pcie: devm_phy_get fail
[ 14.903818] j721e-pcie 2910000.pcie: Failed to init phy
[ 19.167271] usb usb1-port1: Cannot enable. Maybe the USB cable is bad?
[ 23.259263] usb usb1-port1: Cannot enable. Maybe the USB cable is bad?
[ 23.259383] usb usb1-port1: attempt power cycle
[ 27.667263] usb usb1-port1: Cannot enable. Maybe the USB cable is bad?
[ 31.755263] usb usb1-port1: Cannot enable. Maybe the USB cable is bad?
[ 31.755390] usb usb1-port1: unable to enumerate USB device
