Hi3536 VI采集不到数据

大家好，
       Hi3536 VI采集时，除了要配置vi管脚的复用外，还要配什么吗？
       我前端接了片FPGA，送过来1080p30的yuv422数据，现在配了管脚复用后运行cascade里面的demo，采集不到任何数据，管脚配置和vi log如下：
himm 0x120f00a0 0x1  #muxctrl_reg40  vi_clk;
himm 0x120f009c 0x1  #muxctrl_reg39  vi_data0;
himm 0x120f00a4 0x1  #muxctrl_reg41  vi_data1;
himm 0x120f00a8 0x1  #muxctrl_reg42  vi_data2;
himm 0x120f00ac 0x1  #muxctrl_reg43  vi_data3;
himm 0x120f00b0 0x1  #muxctrl_reg44  vi_data4;
himm 0x120f00b4 0x1  #muxctrl_reg45  vi_data5;
himm 0x120f00b8 0x1  #muxctrl_reg46  vi_data6;
himm 0x120f00bc 0x1  #muxctrl_reg47  vi_data7;
himm 0x120f00c0 0x1  #muxctrl_reg48  vi_data8;
himm 0x120f00cc 0x1  #muxctrl_reg51  vi_data9;
himm 0x120f00d0 0x1  #muxctrl_reg52  vi_data10;
himm 0x120f00d8 0x1  #muxctrl_reg54  vi_data11;
himm 0x120f00d4 0x1  #muxctrl_reg53  vi_data12;
himm 0x120f00c4 0x1  #muxctrl_reg49  vi_data13;
himm 0x120f00c8 0x1  #muxctrl_reg50  vi_data14;
himm 0x120f00dc 0x1  #muxctrl_reg55  vi_data15;