瑞芯微RK3288 usb host2接一路摄像头，摄像头不稳定

RK3288 host2这一路直连了一个usb摄像头，非常不稳定，跑monkey压力测试进程出现摄像头异常。日志如下面：目前遇到的问题，open打开摄像头会卡住耗时3/4十秒。streamon超时预览失败。使用过程中，usb摄像头disconnect重连等等

[ 2360.054458] [uvc_v4l2_open][484]
<3>[ 2360.054485] [uvc_v4l2_open][486]
<3>[ 2365.327707] uvcvideo: Failed to set UVC commit control : -110 (exp. 26).
<3>[ 2370.594399] uvcvideo: Failed to set UVC commit control : -110 (exp. 26).
<3>[ 2377.683016] [uvc_v4l2_open][484]
<3>[ 2377.683042] [uvc_v4l2_open][486]
<6>[ 2382.997636] usb 1-1: reset high-speed USB device number 2 using dwc2
<3>[ 2388.174242] usb 1-1: device descriptor read/64, error -110
<13>[ 2401.565032] init: Untracked pid 2366 exited with status 72
<3>[ 2403.454274] usb 1-1: device descriptor read/64, error -110
<3>[ 2408.910928] usb 1-1: device descriptor read/64, error -110
<6>[ 2419.376930] restoring control 00000000-0000-0000-0000-000000000101/0/2
<6>[ 2419.376954] restoring control 00000000-0000-0000-0000-000000000101/10/5
<6>[ 2419.376960] restoring control 00000000-0000-0000-0000-000000000101/12/11
<3>[ 2420.660269] uvcvideo: Failed to set UVC commit control : -32 (exp. 26).
<13>[ 4161.399639] init: Untracked pid 13315 exited with status 0
<13>[ 6469.190818] init: Untracked pid 18059 exited with status 0