Re: [PATCH] i915: Quirk out disconnected backlight

From: Grant Likely
Date: Fri Sep 14 2012 - 09:09:57 EST

On Fri, Sep 14, 2012 at 2:01 PM, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote:
> On Fri, 14 Sep 2012 13:57:06 +0100, Grant Likely <grant.likely@xxxxxxxxxxxx> 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.

Perhaps, but userspace (Ubuntu) isn't doing anything with it, and it
still remains that it makes no sense whatsoever to register a
backlight device that doesn't exist.


> -Chris
> --
> Chris Wilson, Intel Open Source Technology Centre

Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
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