DM814x by camera interface (port) with BT.1120 YUV input

We are working in DM8148 board. The board was designed base on  APPRO 8127IPNC . We are using the IPNC V3.2 software. we replace camera sensor(9j003) by YUV 16bit 1080P input. and camera interface port of DM814x as video in.but the image is gray.We change the part of ISS,as below:

1. \psp\iss\drivers\capture\src\issdrv_captureApi.c

 2. \psp\iss\core\src\iss_drv_isif.c

3. \psp\iss\core\src\iss_drv_ipipe.c

 I think there are some mistakes in our configurations.please give me some good advices to solve the problem ,thank you!

Jiger