Thanks for your reply. 
But this is no this file under my dir arch/arm64/boot/ti/, Would you like to share it with me?
Besides there are dts files k3-j721e-main.dtsi and k3-j721e-common-proc-board.dts. I am confused that if there is any difference between the dts when TAD4 PCIE configured as NTB and as EP.
Blew shows the dts files under my dir arch/arm64/boot/ti/.
