From: Robert Jarzmik <robert.jarzmik@free.fr>
To: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Hans Verkuil <hverkuil@xs4all.nl>,
Linux Media Mailing List <linux-media@vger.kernel.org>,
Magnus Damm <magnus.damm@gmail.com>,
Darius Augulis <augulis.darius@gmail.com>,
Paul Mundt <lethal@linux-sh.org>
Subject: Re: [RFC 09/10 v2] v4l2-subdev: re-add s_standby to v4l2_subdev_core_ops
Date: Sat, 23 May 2009 13:49:08 +0200 [thread overview]
Message-ID: <87hbzc6nuz.fsf@free.fr> (raw)
In-Reply-To: <Pine.LNX.4.64.0905221933180.4418@axis700.grange> (Guennadi Liakhovetski's message of "Fri\, 22 May 2009 19\:37\:58 +0200 \(CEST\)")
Guennadi Liakhovetski <g.liakhovetski@gmx.de> writes:
>> Let me be even more precise about a usecase :
>> - a user takes a picture with his smartphone
>> - the same user then uses his phone to call his girlfriend
>> - the girlfriend has a lot of things to say, it lasts for 1 hour
>> In that case, the sensor _has_ to be switched off.
>
> Nice example, thanks! Ok, of course, we must not leave the poor girl with
> her boyfriend's flat battery:-)
Dear, of course not, imagine what she would do to him ! :)
> I think we can put the camera to a low-power state in streamoff. But - not
> power it off! This has to be done from system's PM functions.
That means, from a sensor POV, through icd->stop_capture().
For my single mt9m111, it's fine by me, as the mt9m111 does have a powersave
mode. Yet I'm wondering if there are sensors without that capability, with only
one control (ie. one GPIO line) to switch them on and off ...
> What was there on linux-pm about managing power of single devices?...
Reference ?
Cheers.
--
Robert
next prev parent reply other threads:[~2009-05-23 11:49 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-15 17:18 [PATCH 00/10 v2] soc-camera conversions Guennadi Liakhovetski
2009-05-15 17:18 ` [PATCH 01/10 v2] soc-camera: prepare soc_camera_platform.c and its users for conversion Guennadi Liakhovetski
2009-05-15 17:19 ` [PATCH 02/10 v2] ARM: convert pcm037 to the new platform-device soc-camera interface Guennadi Liakhovetski
2009-05-20 7:38 ` Sascha Hauer
2009-05-20 9:01 ` Guennadi Liakhovetski
2009-05-20 11:23 ` Sascha Hauer
2009-05-20 12:07 ` Guennadi Liakhovetski
2009-05-22 10:58 ` [PATCH] pcm037: add MT9T031 camera support Guennadi Liakhovetski
2009-05-15 17:19 ` [PATCH 03/10 v2] soc_camera_platform: pass device pointer from soc-camera core on .add_device() Guennadi Liakhovetski
2009-05-15 17:19 ` [PATCH 04/10 v2] soc-camera: convert to platform device Guennadi Liakhovetski
2009-05-15 17:19 ` [PATCH 05/10 v2] sh: soc-camera updates Guennadi Liakhovetski
2009-05-15 17:19 ` [PATCH 06/10 v2] soc-camera: remove unused .iface from struct soc_camera_platform_info Guennadi Liakhovetski
2009-05-15 17:20 ` [PATCH 07/10 v2] sh: prepare board-ap325rxa.c for v4l2-subdev conversion Guennadi Liakhovetski
2009-05-15 17:20 ` [PATCH 08/10 v2] v4l2-subdev: add a v4l2_i2c_subdev_board() function Guennadi Liakhovetski
2009-05-21 13:53 ` Hans Verkuil
2009-05-21 15:33 ` Guennadi Liakhovetski
2009-05-22 8:58 ` Eduardo Valentin
2009-05-22 10:45 ` [RFC] v4l2_subdev i2c: Add i2c board info to v4l2_i2c_new_subdev Eduardo Valentin
2009-05-22 11:55 ` [PATCH 08/10 v2] v4l2-subdev: add a v4l2_i2c_subdev_board() function Hans Verkuil
2009-05-22 12:16 ` Guennadi Liakhovetski
2009-05-22 12:58 ` Hans Verkuil
2009-05-22 13:14 ` Eduardo Valentin
2009-05-25 10:18 ` Eduardo Valentin
2009-05-25 10:37 ` [PATCH 1/1] v4l2_subdev i2c: Add v4l2_i2c_new_subdev_board i2c helper function Eduardo Valentin
2009-05-15 17:20 ` [RFC 09/10 v2] v4l2-subdev: re-add s_standby to v4l2_subdev_core_ops Guennadi Liakhovetski
2009-05-21 13:33 ` Hans Verkuil
2009-05-22 14:23 ` Guennadi Liakhovetski
2009-05-22 14:30 ` Hans Verkuil
2009-05-22 16:44 ` Robert Jarzmik
2009-05-22 17:37 ` Guennadi Liakhovetski
2009-05-23 11:49 ` Robert Jarzmik [this message]
2009-05-23 15:17 ` Guennadi Liakhovetski
2009-05-15 17:20 ` [PATCH/RFC 10/10 v2] soc-camera: (partially) convert to v4l2-(sub)dev API Guennadi Liakhovetski
2009-05-15 17:31 ` [PATCH 00/10 v2] soc-camera conversions Guennadi Liakhovetski
2009-05-19 3:05 ` Paul Mundt
2009-06-08 19:19 ` Guennadi Liakhovetski
2009-06-09 13:26 ` Paul Mundt
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