Linux/AM5728: Dual camera demo issues

Tool/software: Linux

Hello,

 I want to ask some questions about the dual-camera-demo.When I use the command：

dual_camera 2 -platform linuxfb

it showed the information:

CRTCs size: 800x480

Capture 0: Opened Channel

Capture 0: Capable of streaming

Capture 0: Init done successfully

ERROR:v4l2_queue_buffer:425: VIDIOC_QBUF failed: Bad address (-1)
ERROR:v4l2_queue_buffer:425: VIDIOC_QBUF failed: Bad address (-1)
ERROR:v4l2_queue_buffer:425: VIDIOC_QBUF failed: Bad address (-1)

Capture 1: Opened Channel

Capture 1: Capable of streaming

VIDIOC_G_PARM: Inappropriate ioctl for device
Only one camera detected
Running the demo on am57xx processor
w=800, h=600

and the whole LCD screen of the AM5728 was green.

I used the sdk4.0 and the camera was on the board (not the usb camera).

So could u give me some advice to solve the problem?

Thanks&regards!