hi3531运行sdk源码出错

使用的是hi3531，运行sdk源码里的sample_vio，出现如下错误：
# ./sample_vio 2
[SAMPLE_COMM_SYS_CalcPicVbBlkSize]-167: w:1920, u32AlignWidth:64
[SAMPLE_COMM_SYS_CalcPicVbBlkSize]-167: w:768, u32AlignWidth:64
[SAMPLE_COMM_SYS_CalcPicVbBlkSize]-167: w:768, u32AlignWidth:64
[SAMPLE_COMM_VI_StartDev]-724: HI_MPI_VI_SetDevAttr failed with 0xffffffff!
[SAMPLE_COMM_VI_Start]-829: SAMPLE_COMM_VI_StartDev failed with 0xffffffff
[SAMPLE_VIO_4HD_Homo]-1174: start vi failed!

# cat /proc/umap/vi

[VIU] Version: [Hi3531_MPP_V2.0.B.0 ], Build Time: [Nov 30 2013, 18:28:56]

-----MODULE PARAM--------------------------------------------------------------
detect_err_frame drop_err_frame stop_int_level  max_cas_gap
               0              0              0        28000
program exit abnormally!
有没有知道是啥问题的，第一次使用hi3531,谢谢！！！！！