hi3519V101 USB Device摄像头无法实现采用V4L2采集

hi3519V101 利用usb3.0做USB Device摄像头，完全按照海思SDK(Hi3519 V101R001C01SPC020)中《外围设备驱动操作指南》中的方法，仍然无法无法实现采用V4L2采集视频，主机host端和板子device端都能成功识别出UVC Camera,但是采用AMCAP软件仍然无法正常显示视频(黑屏或者闪屏，没有图像信息)，用海思给的Linux端放虚拟机中采集写yuv文件也还是不行，请问有谁在hi3519v101上实现过？？？我就想知道到底hi3519v101能不能做USB摄像头采集？？？？   
        另外，板子上运行uvc-gadget程序，输出这些信息,是什么意思？？？？是否正常？？？，如下：
/mnt/nfs/MCU/hi3519_V101/usb_cam # ./uvc-gadget

------------[ cut here ]------------
WARNING: CPU: 1 PID: 138 at drivers/usb/gadget/composite.c:313 usb_function_activate+0x8c/0x90 [libcomposite]()
Modules linked in: g_webcam usb_f_uvc libcomposite configfs dwc_usb3
CPU: 1 PID: 138 Comm: uvc-gadget Not tainted 3.18.20 #1
[] (unwind_backtrace) from [] (show_stack+0x10/0x14)
[] (show_stack) from [] (dump_stack+0x88/0x98)
[] (dump_stack) from [] (warn_slowpath_common+0x6c/0x88)
[] (warn_slowpath_common) from [] (warn_slowpath_null+0x1c/0x24)
[] (warn_slowpath_null) from [] (usb_function_activate+0x8c/0x90 [libcomposite])
[] (usb_function_activate [libcomposite]) from [] (uvc_function_connect+0x18/0x38 [usb_f_uvc])
[] (uvc_function_connect [usb_f_uvc]) from [] (uvc_v4l2_open+0x54/0x64 [usb_f_uvc])
[] (uvc_v4l2_open [usb_f_uvc]) from [] (v4l2_open+0x9c/0x100)
[] (v4l2_open) from [] (chrdev_open+0xd0/0x190)
[] (chrdev_open) from [] (do_dentry_open+0x1d8/0x2f0)
[] (do_dentry_open) from [] (do_last+0x6b0/0xc5c)
[] (do_last) from [] (path_openat+0xb8/0x640)
[] (path_openat) from [] (do_filp_open+0x2c/0x88)
[] (do_filp_open) from [] (do_sys_open+0x104/0x1c8)
[] (do_sys_open) from [] (ret_fast_syscall+0x0/0x38)
---[ end trace f6c5647bbc5c908f ]---
g_webcam gadget: UVC connect failed with -22
open succeeded, file descriptor = 3
device is dwc_usb3_pcd on bus gadget
Unable to open MJPEG image './mjpeg'

     uvc_fill_streaming_control(dev, &dev->probe, 0, 0);    func:uvc_events_init line:1124
  uvc_fill_streaming_control:V4L2_PIX_FMT_YUYV,line:795
    uvc_fill_streaming_control(dev, &dev->commit, 0, 0);     func:uvc_events_init line:1126
  uvc_fill_streaming_control:V4L2_PIX_FMT_YUYV,line:795

[img]D:\1.png[/img]