linux-kernel - Re: [PATCHv6] support for AD5820 camera auto-focus coil

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Message-ID: <20160818202559.GF3182@valkosipuli.retiisi.org.uk>
Date:   Thu, 18 Aug 2016 23:26:00 +0300
From:   Sakari Ailus <sakari.ailus@....fi>
To:     Pavel Machek <pavel@....cz>
Cc:     Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
        pali.rohar@...il.com, sre@...nel.org,
        kernel list <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-omap@...r.kernel.org, tony@...mide.com, khilman@...nel.org,
        aaro.koskinen@....fi, patrikbachan@...il.com, serge@...lyn.com,
        linux-media@...r.kernel.org, mchehab@....samsung.com
Subject: Re: [PATCHv6] support for AD5820 camera auto-focus coil

Hi Pavel,

On Thu, Aug 18, 2016 at 12:45:39PM +0200, Pavel Machek wrote:
> On Thu 2016-08-11 14:16:34, Sakari Ailus wrote:
> > On Tue, Aug 09, 2016 at 01:23:23AM +0200, Pavel Machek wrote:
> > > On Wed 2016-08-10 15:01:05, Sakari Ailus wrote:
> > > > On Mon, Aug 08, 2016 at 11:41:32PM +0200, Pavel Machek wrote:
> > > > > On Mon 2016-08-08 11:09:56, Sakari Ailus wrote:
> > > > > > On Fri, Aug 05, 2016 at 12:26:11PM +0200, Pavel Machek wrote:
> > > > > > > 
> > > > > > > This adds support for AD5820 autofocus coil, found for example in
> > > > > > > Nokia N900 smartphone.
> > > > > > 
> > > > > > Thanks, Pavel!
> > > > > > 
> > > > > > Let's use V4L2_CID_FOCUS_ABSOLUTE, as is in the patch. If we get something
> > > > > > better in the future, we'll switch to that then.
> > > > > > 
> > > > > > I've applied this to ad5820 branch in my tree.
> > > > > 
> > > > > Thanks. If I understands things correctly, both DTS patch and this patch are
> > > > > waiting in your tree, so we should be good to go for 4.9 (unless some unexpected
> > > > > problems surface)?
> > > > 
> > > > Yeah. I just compiled it but haven't tested it. I presume it'll work. :-)
> > > 
> > > I'm testing it on n900. I guess simpler hardware with ad5820 would be better for the
> > > test...
> > > 
> > > What hardware do you have?
> > 
> > N900. What else could it be? :-) :-)
> 
> Heh. Basically anything is easier to develop for than n900 :-(.

Is it?

I actually find the old Nokia devices very practical. It's easy to boot your
own kernel and things just work... until musb broke a bit recently. It
requires reconnecting the usb cable again to function.

I have to admit I mostly use an N9.

> 
> Ok, for real testing, Ivaylo's camera patchset is useful, so that you
> have picture to work with, plus your subdevs for omap3 patchset (which
> needs a forward port).
> 
> I have patches against v4.7, if you are interested.

They should be pretty close to mainline. The rebase should be very easy.

Patches against media-tree master branch would always be better naturally.
:-)

> 
> I guess subdevs for omap3 should be merged at this point. Do you have
> any plans to do that, or should I take a look?

What's still missing? I think I've yet to check the et8ek8 driver and the
device tree description is missing. That's what comes to mind right now.

-- 
Kind regards,

Sakari Ailus
e-mail: sakari.ailus@....fi	XMPP: sailus@...iisi.org.uk