用户您好，请详细描述您所遇到的问题。
1.硬件获取渠道：芯板坊
2.当前系统镜像版本：BusyBox v1.29.2 (2020-06-17 20:16:09 CST) multi-call binary.
3.系统镜像为出厂自带的镜像。
问题说明：
1.usb摄像头插入之后能够正常识别，dmesg信息如下：
[10694.314261] usb 1-1.3: USB disconnect, device number 5
[10702.126213] usb 1-1.3: new high-speed USB device number 6 using xhci-hcd
[10702.253111] uvcvideo: Found UVC 1.00 device HD USB Camera (32e4:9520)
[10702.383516] uvcvideo 1-1.3:1.0: Entity type for entity Extension 2 was not initialized!
[10702.384556] uvcvideo 1-1.3:1.0: Entity type for entity Processing 3 was not initialized!
[10702.385600] uvcvideo 1-1.3:1.0: Entity type for entity Camera 1 was not initialized!
[10702.386856] input: HD USB Camera as /devices/platform/soc/b2000000.usb/xhci-hcd.0.auto/usb1/1-1/1-1.3/1-1.3:1.0/input/input3
2.设备节点能够正常产生。
root@x3sdbx3-samsung2G-3200:~# ls /dev/video*
/dev/video0 /dev/video1 /dev/video2 /dev/video3 /dev/video4 /dev/video5 /dev/video6 /dev/video7 /dev/video8
3.参考用户手册《 8.2.19. 如何使用usb_webcam单元测试程序》报以下错误：
root@x3sdbx3-samsung2G-3200:~# /etc/init.d/usb-gadget.sh start uvc
Detecting platform:
board : Hobot XJ3 SOC SDB
udc :
sh: missing ]
cat: can’t open ‘/sys/devices/platform/soc//role’: No such file or directory
not usb gadget mode, can’t start usb-gadget
root@x3sdbx3-samsung2G-3200:~#