linux-kernel - Re: [PATCH 2/5] asus-wmi: Create quirk for airplane

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Date:	Wed, 25 May 2016 14:24:15 -0700
From:	Darren Hart <dvhart@...radead.org>
To:	Corentin Chary <corentin.chary@...il.com>
Cc:	João Paulo Rechi Vita <jprvita@...il.com>,
	"platform-driver-x86@...r.kernel.org" 
	<platform-driver-x86@...r.kernel.org>,
	acpi4asus-user <acpi4asus-user@...ts.sourceforge.net>,
	LKML <linux-kernel@...r.kernel.org>, linux@...lessm.com,
	João Paulo Rechi Vita 
	<jprvita@...lessm.com>
Subject: Re: [PATCH 2/5] asus-wmi: Create quirk for airplane_mode LED

On Wed, May 25, 2016 at 09:13:23AM +0200, Corentin Chary wrote:
> On Mon, Feb 8, 2016 at 6:05 PM, João Paulo Rechi Vita <jprvita@...il.com> wrote:
> > Some Asus laptops that have an "airplane mode" indicator LED, also have
> > the WMI WLAN user bit set, and the following bits in their DSDT:
> >
> > Scope (_SB)
> > {
> >   (...)
> >   Device (ATKD)
> >   {
> >     (...)
> >     Method (WMNB, 3, Serialized)
> >     {
> >       (...)
> >       If (LEqual (IIA0, 0x00010002))
> >       {
> >         OWGD (IIA1)
> >         Return (One)
> >       }
> >     }
> >   }
> > }
> >
> > So when asus-wmi uses ASUS_WMI_DEVID_WLAN_LED (0x00010002) to store the
> > wlan state, it drives the airplane mode indicator LED (through the call
> > to OWGD) in an inverted fashion: the LED is ON when airplane mode is OFF
> > (since wlan is ON), and vice-versa.
> >
> > This commit creates a quirk to not register a RFKill switch at all for
> > these laptops, to allow the asus-wireless driver to drive the airplane
> > mode LED correctly. It also adds a match to that quirk for the Asus
> > X555UB.
> 
> This is really something that should get merged, multiple users are
> affected by this. I do not own any of these laptops, but would there
> be a way to detect this behavior instead of having static quircks ?

I believe this is all still blocked on the underlying RFKILL support. João,
correct me if I'm mistaken.

-- 
Darren Hart
Intel Open Source Technology Center