linux-kernel - Re: [PATCH v4] ACPI / video: Add systems that should favour native backlight interface

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Date:	Tue, 18 Feb 2014 17:46:40 +0200
From:	Mika Westerberg <mika.westerberg@...ux.intel.com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Takashi Iwai <tiwai@...e.de>, Aaron Lu <aaron.lu@...el.com>,
	Igor Gnatenko <i.gnatenko.brain@...il.com>,
	Theodore Tso <tytso@....edu>, Peter Weber <bugs@...honey.com>,
	Lennart Poettering <lennart@...ttering.net>,
	Kevin Smith <thirdwiggin@...il.com>,
	Rinat Ibragimov <ibragimovrinat@...l.ru>, sov.info@...l.ru,
	Thomas Christensen <christensenthomas@...il.com>,
	Vladimir Sherenkov <a_12300@...l.ru>,
	ACPI Devel Mailing List <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"platform-driver-x86@...r.kernel.org" 
	<platform-driver-x86@...r.kernel.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Daniel Vetter <daniel@...ll.ch>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	"intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>
Subject: Re: [PATCH v4] ACPI / video: Add systems that should favour native
 backlight interface

On Tue, Feb 18, 2014 at 04:22:27PM +0100, Rafael J. Wysocki wrote:
> On Tuesday, February 18, 2014 02:31:46 PM Takashi Iwai wrote:
> > At Tue, 18 Feb 2014 12:34:42 +0200,
> > Mika Westerberg wrote:
> > > 
> > > On Tue, Feb 18, 2014 at 01:54:20PM +0800, Aaron Lu wrote:
> > > > +	{
> > > > +	.callback = video_set_use_native_backlight,
> > > > +	.ident = "HP EliteBook 2013 models",
> > > > +	.matches = {
> > > > +		DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
> > > > +		DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook "),
> > > > +		DMI_MATCH(DMI_PRODUCT_NAME, " G1"),
> > > > +		},
> > > > +	},
> > > 
> > > I see my device is listed here but the above doesn't really use native
> > > backlight because it is still in acpi_osi blacklist. Tried this and I can
> > > see both acpi_video0 and intel_backlight listed under /sys/class/backlight.
> > > Was this the intention?
> > 
> > The acpi_osi blacklist commit (2d4054d84224) has to be reverted, as I
> > mentioned earlier.  But the revert can be done individually after
> > merging this patch.  Rafael, could you care?
> 
> Done.  Please check the result in linux-pm.git/linux-next.

With your revert and this patch from Aaron, backlight on my HP EliteBook
Revolve G1 works fine, thanks!

Tested-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
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