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Re: [PATCH 0/3] gspca: kinect cleanup, ov534 port to control framework



On Fri, 18 May 2012 09:08:29 +0200
Jean-Francois Moine <moinejf@xxxxxxx> wrote:

> On Wed, 16 May 2012 23:42:43 +0200
> Antonio Ospite <ospite@xxxxxxxxxxxxxxxxx> wrote:
> 
> > The second patch removes the dependency between auto gain and auto white
> > balance, I'd like to hear Jean-Francois on this, the webcam (the ov772x
> > sensor) is able to set the two parameters independently and the user can
> > see the difference of either, is there a reason why we were preventing
> > the user from doing so before?
> 
> Hi Antonio,
> 
> I added this dependency by the git commit 2d19a2c1186d86e3
> on Thu, 12 Nov 2009 (the original patch was done under mercurial).
> 
> Looking in my archives, I retrieved this mail I have sent to you,
> Max Thrun, kaswy, baptiste_lemarie, Martin Drake and Jim Paris:

[...]
> > > > > *  * AWB doesn't have any effect?*
> > > > >  
> > > > I notice its effect if i start uvcview, enable auto gain, then
> > > > enable awb.
> > > >  
> > > 
> > > If there is a strict dependency between these two settings,
> > > shouldn't the driver enforce it?  

Here I made a wrong assumption at the time, the bug must have been
somewhere else, forgive the "younger me" in that email :)

> Otherwise, you are right, the ov7670 and ov7729 datasheets do not talk
> about a possible AGC and AWB dependency...

OK, thanks.

Regards,
   Antonio

-- 
Antonio Ospite
http://ao2.it

A: Because it messes up the order in which people normally read text.
   See http://en.wikipedia.org/wiki/Posting_style
Q: Why is top-posting such a bad thing?
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