From: Pavel Machek <pavel@ucw.cz>
To: Matt Domsch <Matt_Domsch@dell.com>
Cc: jack@antonello.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Dell laptop backlight driver
Date: Tue, 30 Oct 2007 14:52:48 +0000 [thread overview]
Message-ID: <20071030145247.GE7742@ucw.cz> (raw)
In-Reply-To: <20071028161955.GF23359@auslistsprd01.us.dell.com>
Hi!
> > this driver implements backlight control on Dell laptops
> > which use SMI for changing brightness levels.
> >
> > The driver is INCOMPLETE since it is unable to probe some required
> > parameters
> > in order to perform backlight control. Such parameters are found in a Dell
> > proprietary DMI table which should be parsed. For now external tools may be
> > used to find these parameters by hand. So if you intend to try this out,
> > FIRST write your laptop model parameters correctly inside the source code
> > as explained in Documentation/dell-laptop.txt.
> >
> > Parts of this driver may also be used to provide additional functionalities
> > similarly to the drivers/misc/*-laptop.c drivers.
>
> Why is this better done in the kernel rather than in userspace with
> libsmbios as you've noted?
Well, keeping the same interface as other notebooks has some
advantages... and means that kernel does its job - hw abstraction.
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:[~2007-11-01 14:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-28 16:12 [PATCH] Dell laptop backlight driver jack
2007-10-28 16:19 ` Matt Domsch
2007-10-28 18:06 ` lists
2007-10-28 19:20 ` Matt Domsch
2007-10-28 23:12 ` lists
2007-10-29 15:40 ` Matthew Garrett
2007-10-30 14:52 ` Pavel Machek [this message]
2007-10-28 22:30 ` jack
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