how to modify capture driver of dm6467t and DVSDK3.1 encode demos

Other Parts Discussed in Thread: TVP7002, THS7303, TVP5147Dear! i am a student,now i use Ti's dm6467t device to develope ,but in ours production,we didnot use tvp7002 and tvp5147,ths7303 device,The HD video source input and output controlled by our's HDL program of FPGA ,so ,i want to known how to modify the file under git\drivers\video\davinci\vpif_capure.c and vpif_display.c ? and how to modifycapture.c of encode demos with DVSDK3.1 ,because when i execute encode then err messages""Failed to create capture device,720P component input connected?" and the program exit. thank you!