Hi, Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> writes: > Hi Felipe, > > On Friday 23 Sep 2016 11:27:26 Felipe Balbi wrote: >> yfw <nh26223@xxxxxxxxx> 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 >> >> usb_function_active() and usb_function_deactivate() are unbalanced. Do >> >> you have any other changes to g_webcam? >> > >> > With uvc function gadget driver, user daemon uvc-gadget must be started >> > before connect to host. Not sure whether g_webcam has same requirement. >> >> f_uvc.c should be handling that by means for usb_function_deactivate(). >> >> I'll try keeping cable disconnected until uvc-gadget is running. > > Things might have changed since we've discussed the issue several years ago, > but back then at least the musb UDC started unconditionally connected. That's kinda of not the case anymore. We deactivate during function registration if a certain flag is set. -- balbi
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