From: Matthew Garrett <mjg59@srcf.ucam.org>
To: alan-jenkins@tuffmail.co.uk
Cc: Pekka Enberg <penberg@cs.helsinki.fi>,
Corentin Chary <corentin.chary@gmail.com>,
acpi4asus-user@lists.sourceforge.net, len.brown@intel.com,
linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
Darren Salt <linux@youmustbejoking.demon.co.uk>
Subject: Re: [PATCH] eeepc-laptop: enable camera by default
Date: Mon, 8 Jun 2009 00:28:58 +0100 [thread overview]
Message-ID: <20090607232856.GA1805@srcf.ucam.org> (raw)
In-Reply-To: <9b2b86520906070841v334d8306ha656c95ee4536261@mail.gmail.com>
On Sun, Jun 07, 2009 at 04:41:30PM +0100, Alan Jenkins wrote:
> Hmm, some cameras have input devices (i.e. buttons). In fact, uvcvideo
> registers an input device on my EEE even though it has no buttons. I
> think that needs investigating :-(.
>
> It's quite likely that the buttons can stop working when suspended.
> And there might be other devices with the same IDs, which have a
> button wired up.
A change has recently been committed that results in the button only
working if the v4l device is open. Otherwise you've got several wakeups
a second due to the polling of the button endpoint. I'm assuming that
opening the device disables autosuspend, so I wouldn't worry about that.
It'd be interesting to try enabling autosuspend on all UVC devices. Can
a driver indicate that its hardware supports it?
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2009-06-07 23:29 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-05 8:59 [PATCH] eeepc-laptop: enable camera by default Pekka J Enberg
2009-06-05 11:46 ` Corentin Chary
2009-06-05 12:44 ` Pekka Enberg
2009-06-05 13:02 ` Corentin Chary
2009-06-05 13:39 ` Alan Jenkins
2009-06-05 13:51 ` Pekka Enberg
2009-06-05 13:54 ` Pekka Enberg
2009-06-05 13:58 ` Corentin Chary
2009-06-05 14:38 ` Alan Jenkins
2009-06-05 14:50 ` Pekka Enberg
2009-06-05 14:55 ` Alan Jenkins
2009-06-05 15:08 ` Alan Jenkins
2009-06-05 15:14 ` Pekka Enberg
2009-06-07 14:54 ` Darren Salt
2009-06-07 15:41 ` Alan Jenkins
2009-06-07 23:28 ` Matthew Garrett [this message]
2009-06-08 3:03 ` Alan Stern
2009-06-08 3:07 ` Matthew Garrett
2009-06-08 3:10 ` Alan Stern
2009-06-08 15:00 ` Matthew Garrett
2009-06-08 20:44 ` Alan Stern
2009-06-05 15:13 ` Alan Stern
2009-06-05 15:22 ` Pekka Enberg
2009-06-05 21:01 ` Woody Suwalski
2009-06-06 7:12 ` Corentin Chary
2009-06-06 8:04 ` Alan Jenkins
2009-06-05 20:08 ` Andrew Morton
2009-06-06 7:25 ` Corentin Chary
2009-06-06 7:31 ` Andrew Morton
2009-06-06 7:52 ` Corentin Chary
2009-06-06 9:17 ` Pekka Enberg
2009-06-06 10:17 ` Corentin Chary
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