Hi Rex, I used the pre-built kernel as host, it cannot find the endpoint device too. The video used the old release so the kernel config is not the same as latest PSDK, and another difference is a AM57xx-EVM board is used as EP with a miniPCIe-PCIe adapter, while I used 2 TMDXIDK5728 boards. Here're the configurations of my setup: 2 TMDXIDK5728 boards, modified PCIe X1 cable with 12V/3.3V/clk+- pins disabled; The PSDK used is the latest 05.03.00.07, kernel 4.14.79, when rebuild the kernel the used config is tisdk_am57xx-evm_defconfig, dtb is am572x-idk.dtb; Followed the steps on EP ( http://software-dl.ti.com/processor-sdk-linux/esd/docs/latest/linux/Foundational_Components_Kernel_Drivers.html#pcie-end-point ), the endpoint controller folder in configfs is there, and all settings didn't show additional errors. After echo 1 to controller start, boot the RC board; on RC board console lspci shows only PCIe controller 0x104c:0x8888, dmesg shows this line, not certain it's expected or not: "dra7-pcie 51000000.pcie: phy link never came up". Xin
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