linux-kernel - Re: [PATCH 4/6] input: cyapa: enable/disable trackpad device based on LID state

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Message-ID: <1507406.BNOsJcxmP9@vostro.rjw.lan>
Date:	Tue, 20 May 2014 14:40:12 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Dudley Du <dudl@...ress.com>, Benson Leung <bleung@...gle.com>,
	Daniel Kurtz <djkurtz@...gle.com>,
	David Solda <dso@...ress.com>,
	"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/6] input: cyapa: enable/disable trackpad device based on LID state

On Monday, May 19, 2014 08:43:02 PM Dmitry Torokhov wrote:
> Hi Dudley,
> 
> On Wed, Apr 16, 2014 at 08:39:34AM +0000, Dudley Du wrote:
> > Rely on EV_SW and SW_LID bits to identify a LID device, and hook
> > up our filter to listen for SW_LID events to enable/disable touchpad when
> > LID is open/closed.
> > TEST=test on Chomebooks.
> 
> This is a policy and it does not belong in the kernel. Please work with
> Rafael to establish generic interface to put devices into low power mode
> (like accelerating runtime PM idle timeout)

I'm not really sure what you mean here, care to be more specific?

> and use it when userspace detects that lid is closed.

I guess we get an event then, don't we?

Rafael

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