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Date: Thu, 11 Aug 2011 10:57:50 +0200
From: Jean-Francois Moine <moinejf@free.fr>
To: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Theodore Kilgore <kilgota@banach.math.auburn.edu>,
        Alan Stern <stern@rowland.harvard.edu>,
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        Jan Kiszka <jan.kiszka@siemens.com>,
        Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>, pbonzini@redhat.com,
        Anthony Liguori <aliguori@us.ibm.com>,
        Jes Sorensen <Jes.Sorensen@redhat.com>,
        Oliver Neukum <oliver@neukum.org>, Felipe Balbi <balbi@ti.com>,
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        Takashi Iwai <tiwai@suse.de>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Adam Baker <linux@baker-net.org.uk>
Subject: Re: USB mini-summit at LinuxCon Vancouver
Message-ID: <20110811105750.179e468a@tele>
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On Wed, 10 Aug 2011 17:14:05 -0300
Mauro Carvalho Chehab <mchehab@infradead.org> 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'hentañ	|	      ** Breizh ha Linux atav! **
Jef		|		http://moinejf.free.fr/