linux-kernel - Re: Strange effect with i915 backlight controller

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Message-ID: <s5hk470m1jj.wl%tiwai@suse.de>
Date:	Wed, 16 Nov 2011 18:15:28 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Daniel Mack <zonque@...il.com>
Cc:	Chris Wilson <chris@...is-wilson.co.uk>,
	dri-devel@...ts.freedesktop.org, jbarnes@...tuousgeek.org,
	harald@...hat.com, Keith Packard <keithp@...thp.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Strange effect with i915 backlight controller

At Wed, 16 Nov 2011 13:58:57 +0100,
Daniel Mack wrote:
> 
> On 11/14/2011 11:39 AM, Takashi Iwai wrote:
> > OK, then perhaps a better fix is to change the check to be equivalent
> > with pineview, as you mentioned in the original post.  The handling of
> > bit 0 for old chips was lost during the refactoring of backlight code
> > since 2.6.37.
> > 
> > Does the patch below work for you?
> > 
> > The only concern by this fix is that it changes the max value.  If
> > apps expect some certain (e.g. recorded) value, it may screw up.  But
> > I don't expect this would happen with sane apps.
> 
> Works perfectly - let's ship it :)

OK, now the patch was resent to intel-gfx with proper tags.


thanks,

Takashi
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