Re: USB mini-summit at LinuxCon Vancouver

From: Jean-Francois Moine
Date: Thu Aug 11 2011 - 04:58:11 EST

On Wed, 10 Aug 2011 17:14:05 -0300
Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxx> wrote:

> > -- moving the kernel webcam drivers out of the kernel and doing with these
> > cameras _everything_ including webcam function through libusb. I myself do
> > not have the imagination to be able to figure out how this could be done
> > without a rather humongous amount of work (for example, which streaming
> > apps that are currently available would be able to live with this?) but
> > unless I misunderstand what he was saying, Greg K-H seems to think that
> > this would be the best thing to do.
> I also don't think that this a good alternative. As Hans V. pointed, one of
> our long term targets is to create per-sensor I2C drivers that are independent
> from the bridges. Also, moving it to userspace would require lots of work
> with the duplication of V4L and gspca core into userspace for the devices
> that would be moved, and may have some performance impacts.

If only gspca subdrivers are concerned, moving them to usespace should
be easy: only the gspca main has to be rewritten, and its best place is
in the v4l library.

Ken ar c'hentaà | ** Breizh ha Linux atav! **
Jef |
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