From: Pavel Machek <pavel@ucw.cz>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
pali.rohar@gmail.com, sre@kernel.org,
linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
hverkuil@xs4all.nl, Sakari Ailus <sakari.ailus@iki.fi>
Subject: Re: [PATCH 1/1] v4l: Add camera voice coil lens control class, current control
Date: Sat, 18 Jun 2016 13:28:27 +0200 [thread overview]
Message-ID: <20160618112827.GE20130@amd> (raw)
In-Reply-To: <1475378.4YrS70O1yW@avalon>
Hi!
> If someone has analyzed the existing voice coil lens controllers and could
> share the result, in term of what parameters need to be controlled by the
> system and how they should be controlled, that would be very appreciated. Even
> better would be a real userspace implementation of a voice coil lens control
> algorithm.
Userspace implementation exists, it is called fcam-dev. What it
does... Starts capture, selects focus speed, makes it go through focus
range, looks for the sharpest image in the stream.
Then it computes time when the image was sharpest and thus lens
position, and goes back there.
So for ad5820, we need basically focus position and focus speed. (And
some 16/64 option).
Other coil drivers also have PWM vs. linear option.
Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2016-06-18 11:28 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-17 18:19 [PATCH] support for AD5820 camera auto-focus coil Pavel Machek
2016-05-17 18:33 ` Marcus Folkesson
2016-05-18 8:30 ` Pavel Machek
2016-05-21 5:43 ` [PATCHv2] " Pavel Machek
2016-05-21 6:25 ` Ivaylo Dimitrov
2016-05-21 10:56 ` [PATCHv3] " Pavel Machek
2016-05-21 11:43 ` Ivaylo Dimitrov
2016-05-23 7:41 ` Pali Rohár
2016-05-24 9:04 ` Pavel Machek
2016-05-24 9:16 ` Ivaylo Dimitrov
2016-05-24 20:20 ` Pavel Machek
2016-05-26 3:46 ` Ivaylo Dimitrov
2016-05-24 9:17 ` [PATCHv4] " Pavel Machek
2016-05-25 21:26 ` Sakari Ailus
2016-05-27 20:33 ` Pavel Machek
2016-05-27 20:51 ` [PATCHv5] " Pavel Machek
2016-05-31 21:22 ` Sakari Ailus
2016-05-31 21:34 ` Pavel Machek
2016-06-01 15:24 ` Sakari Ailus
2016-06-01 22:08 ` Pavel Machek
2016-06-02 7:45 ` Sakari Ailus
2016-06-02 19:27 ` Pavel Machek
2016-06-02 21:23 ` Sakari Ailus
2016-06-02 19:30 ` [PATCH] device tree description " Pavel Machek
2016-06-02 21:27 ` Sakari Ailus
2016-06-03 6:19 ` Pavel Machek
2016-06-05 19:07 ` [PATCH] userspace API definitions for " Pavel Machek
2016-06-06 6:06 ` Ivaylo Dimitrov
2016-06-06 7:21 ` Pavel Machek
2016-06-11 22:06 ` Sakari Ailus
2016-06-12 7:54 ` Pavel Machek
2016-06-17 21:28 ` Sakari Ailus
2016-06-12 8:48 ` Pavel Machek
2016-06-12 11:22 ` Sakari Ailus
2016-06-13 19:17 ` Pavel Machek
2016-06-17 21:35 ` Sakari Ailus
2016-06-18 15:37 ` [PATCHv4] support for AD5820 camera " Pavel Machek
2016-06-18 15:38 ` [PATCH] userspace API definitions for " Pavel Machek
2016-07-12 23:32 ` Mauro Carvalho Chehab
2016-07-13 6:57 ` Pavel Machek
2016-07-13 7:26 ` Pavel Machek
2016-06-06 13:29 ` [PATCH] device tree description for AD5820 camera " Rob Herring
2016-06-07 7:10 ` [PATCHv2] " Pavel Machek
2016-06-09 22:37 ` Sakari Ailus
2016-06-04 23:27 ` [PATCHv5] support " kbuild test robot
2016-06-05 0:46 ` kbuild test robot
2016-06-12 20:41 ` [PATCH 1/1] v4l: Add camera voice coil lens control class, current control Sakari Ailus
2016-06-12 21:48 ` Ivaylo Dimitrov
2016-06-17 22:11 ` Pavel Machek
2016-06-17 22:39 ` Laurent Pinchart
2016-06-18 11:28 ` Pavel Machek [this message]
2016-06-17 22:06 ` Pavel Machek
2016-08-05 10:26 ` [PATCHv6] support for AD5820 camera auto-focus coil Pavel Machek
2016-08-05 10:30 ` Pali Rohár
2016-08-08 8:09 ` Sakari Ailus
2016-08-08 21:41 ` Pavel Machek
2016-08-10 12:01 ` Sakari Ailus
2016-08-08 23:23 ` Pavel Machek
2016-08-11 11:16 ` Sakari Ailus
2016-08-18 10:45 ` Pavel Machek
2016-08-18 20:26 ` Sakari Ailus
2016-08-18 21:28 ` Pavel Machek
2016-11-03 10:27 ` Pavel Machek
2016-11-03 21:49 ` Sakari Ailus
2016-11-04 7:45 ` Pavel Machek
2016-11-04 14:49 ` Tony Lindgren
2016-12-14 13:38 ` Pali Rohár
2016-12-14 15:08 ` Tony Lindgren
2016-12-15 6:50 ` Sakari Ailus
2016-12-19 22:23 ` Pavel Machek
2016-08-10 7:34 ` Pali Rohár
2016-08-08 21:40 ` Pavel Machek
2016-08-10 12:00 ` Sakari Ailus
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