On Fri, Sep 23, 2016 at 10:49:57AM +0300, Felipe Balbi wrote: > > Hi, > > Bin Liu <b-liu@xxxxxx> writes: > > +Fengwei Yin per his request. > > > > On Thu, Sep 22, 2016 at 10:48:40PM +0300, Felipe Balbi wrote: > >> > >> Hi, > >> > >> Bin Liu <b-liu@xxxxxx> writes: > >> > >> [...] > >> > >> >> Here's one that actually compiles, sorry about that. > >> > > >> > No worries, I was sleeping ;-) > >> > > >> > I will test it out early next week. Thanks. > >> > >> meanwhile, how about some instructions on how to test this out myself? > >> How are you using g_webcam and what are you running on host side? Got a > >> nice list of commands there I can use? I think I can get to bottom of > >> this much quicker if I can reproduce it locally ;-) > > > > On device side: > > - first patch g_webcam as in my first email in this thread to enable > > 640x480@30fps; > > - # modprobe g_webcam streaming_maxpacket=3072 > > - then run uvc-gadget to feed the YUV frames; > > http://git.ideasonboard.org/uvc-gadget.git > > as is, g_webcam never enumerates to the host. It's calls to Right, on mainline kernel (I tested 4.8.0-rc7) g_webcam is broken with DWC3, g_webcam does not enumerate on the host. But it works on v4.4.21. [snip] > > uvc-gadget keeps printing this error message: > > 159 if ((ret = ioctl(dev->fd, VIDIOC_DQBUF, &buf)) < 0) { > 160 printf("Unable to dequeue buffer: %s (%d).\n", strerror(errno), > 161 errno); > 162 return ret; > 163 } I removed this printf, since it floods the console if start uvc-gadget before connect to the host. BTY, you don't have to start uvc-gadget first then connect usb cable. I keep the cable always connected. Regards, -Bin. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
