linux-kernel - Re: [PATCH] i915: Quirk out disconnected backlight

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Message-Id: <84c8a8$5o3dgr@orsmga001.jf.intel.com>
Date:	Fri, 14 Sep 2012 14:01:32 +0100
From:	Chris Wilson <chris@...is-wilson.co.uk>
To:	Grant Likely <grant.likely@...retlab.ca>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:	Grant Likely <grant.likely@...retlab.ca>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	David Airlie <airlied@...ux.ie>,
	Matthew Garrett <mjg@...hat.com>,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH] i915: Quirk out disconnected backlight

On Fri, 14 Sep 2012 13:57:06 +0100, Grant Likely <grant.likely@...retlab.ca> wrote:
> Some platforms (for instance MacbookPros) have custom backlight drivers
> and don't use the integrated i915 backlight control. This patch adds a
> quirk to disable registering the intel backlight when unused on a
> platform.
> 
> Tested on MacbookPro8,3. Without this patch both the intel_backlight and
> gmux_backlight devices get registered and userspace doesn't know which
> it should use.

Userspace is informed throught the backlight/type property.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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