linux-kernel - Re: [PATCH 1/1] V4L: stk11xx, add a new webcam driver

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Message-ID: <4af2d03a0705241607r3c9807c6h3841e87ea4736bd3@mail.gmail.com>
Date:	Fri, 25 May 2007 01:07:09 +0200
From:	"Jiri Slaby" <jirislaby@...il.com>
To:	"Markus Rechberger" <mrechberger@...il.com>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	"Mauro Carvalho Chehab" <mchehab@...radead.org>,
	video4linux-list@...hat.com
Subject: Re: [PATCH 1/1] V4L: stk11xx, add a new webcam driver

On 5/24/07, Markus Rechberger <mrechberger@...il.com> wrote:
> Hi Jiri,
>
> On 5/24/07, Jiri Slaby <jirislaby@...il.com> wrote:
> > Well, no objections on v4l list, try to merge it. Any further comments will
> > be
> > appreciated.
> >
> > --
> >
> > stk11xx, add a new webcam driver
[...]
> > +static int stk1125_camera_asleep(struct stk11xx *dev)
> > +{
> > +     int value;
> > +
> > +     stk11xx_read_registry(dev, 0x0104, &value);
> > +     stk11xx_read_registry(dev, 0x0105, &value);
> > +     stk11xx_read_registry(dev, 0x0106, &value);
> > +
>
> why do you read these values (this is also something in the ongoing
> code I see, the read value just gets overwritten all the time)?

Well, as I tested, reads are neccesary, otherwise it doesn't work. And
when they are needed, you need to read the value to some place in
memory -- the &value.

thanks,
-- 
http://www.fi.muni.cz/~xslaby/            Jiri Slaby
faculty of informatics, masaryk university, brno, cz
e-mail: jirislaby gmail com, gpg pubkey fingerprint:
B674 9967 0407 CE62 ACC8  22A0 32CC 55C3 39D4 7A7E
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