3531A 16 路 demo板样例运行问题求助

样例运行后无法切换模式,如下,设置0,1,2显示器都只显示16个格,无法切换显示模式,并且无法显示输入的图像,输入信号为720P/60 输出分辨率使用的默认的1080P,显示器最高支持4K/30 .样例运行参考了[url=http://bbs.ebaina.com/forum.php?mod=viewthread&tid=18286&extra=page%3D1]16路VIO样例说明[/url]

[code]/mnt/nfs/mpp/sample/vio # ./sample_vio 0
start vo HD0.
start vo HD1.
HDMI start success.
start vo SD0
please choose preview mode, press 'q' to exit this sample.
        0) 1 preview
        1) 4 preview
        2) 8 preview
        q) quit
0
[SAMPLE_VIO_8_1080P]-408: vo(0) switch to 1 mode
please choose preview mode, press 'q' to exit this sample.
        0) 1 preview
        1) 4 preview
        2) 8 preview
        q) quit
1
[SAMPLE_VIO_8_1080P]-408: vo(0) switch to 4 mode
please choose preview mode, press 'q' to exit this sample.
        0) 1 preview
        1) 4 preview
        2) 8 preview
        q) quit
2
[SAMPLE_VIO_8_1080P]-408: vo(0) switch to 9 mode
please choose preview mode, press 'q' to exit this sample.
        0) 1 preview
        1) 4 preview
        2) 8 preview
        q) quit
[/code]