使用sample_vio出现问题，希望大神可以解答

./sample_vio 0
[SAMPLE_COMM_SYS_CalcPicVbBlkSize]-167: w:768, u32AlignWidth:64
[SAMPLE_TW2865_CfgV]-188: open 2865 (/dev/tw2865dev) fail
[SAMPLE_COMM_VI_ADStart]-460: SAMPLE_TW2865_CfgV failed with 0xffffffff!
[SAMPLE_COMM_VI_Start]-818: Start AD failed!
[SAMPLE_VIO_16D1_Normal]-348: start vi failed!
program exit abnormally!


./sample_vio 1
[SAMPLE_COMM_SYS_CalcPicVbBlkSize]-167: w:768, u32AlignWidth:64
[SAMPLE_TW2865_CfgV]-188: open 2865 (/dev/tw2865dev) fail
[SAMPLE_COMM_VI_ADStart]-460: SAMPLE_TW2865_CfgV failed with 0xffffffff!
[SAMPLE_COMM_VI_Start]-818: Start AD failed!
[SAMPLE_VIO_16D1_Homo]-751: start vi failed!
program exit abnormally!

./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
start vo sd0.(bind vi-sub-chn)
u32Width:720, u32Square:2
start vo sd1.(wbc from hd1)
u32Width:720, u32Square:1
start vo hd1: HDMI + VGA, wbc source
u32Width:1920, u32Square:1
HDMI start success.
please choose preview mode, press 'q' to exit this sample.
        0) 1 preview
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        2) 9 preview
        3) 16 preview
        q) quit

但是不显示图像