dm8127 csi2 interface question

hi,all

i want to let csi2 work well，now the csi2 send data to isif and the isif has interrupt, but all of the data are zero;

do the  isp capture the   parallel interface data ? (The  parallel interface of hardware  do not  connect    )  

everybody can give me some advices, why the interrupt have make,but the datas are zero?

thanks all;