On Mon, Aug 31, 2020 at 12:36:21AM +0300, Laurent Pinchart wrote: > Hi Guenter, > [ ... ] > I'll try to prototype what I envision would be a good solution in the > V4L2 core. If stars align, I may even try to push it one level up, to > the chardev layer. Would you then be able to test it ? > Sure, I'll be happy to do that. I ordered a couple of non-UVC webcams (pwc and gspca) from eBay for comparison. Both of those use the v4l2 locking mechanism, so we should be able to see the difference. Thanks, Guenter