I am currently trying to run 2 webcams on a Wandboard board, which have to share a USB hub. Problem is , the current driver implementation (YUV only) saturates the USB hub and in the end I can only connect one camera.
However the UVC driver implementation has a quirk for this kind of situation, and others.
Problem is, I did not find any documentation on how to load these quirks. Could you please assist me with that?
you can change the behaviour of many kernel-modules by passing some parameters.
you can get a list of all available module parameters with the modinfo command:
# modinfo uvcvideo
shows that there is a "quirks" parameters, which can be used.
looking at the faq you posted, it seems that the quirks are really a bitfield, so if you want to enable multiple quirks, you have to add the numbers.
first unload the driver (obviously you must not use it when doing so):
# rmmod uvcvideo
then re-load it with the quirks parameter.
assuming you want to enable both UVC_QUIRK_FIX_BANDWIDTH (which has the hex-value 0x80, which is 128 in decimal) and UVC_QUIRK_RESTRICT_FRAME_RATE (which is 0x200 thus 512) you would use a quirks value of 640 (which is 128+512 resp. 0x200|0x80):
# modprobe uvcvideo quirks=640