linux-kernel - Re: [PATCH] toshiba_acpi: Add full hotkey support

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Message-ID: <20090306100951.GA6268@srcf.ucam.org>
Date:	Fri, 6 Mar 2009 10:09:51 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Daniel Silverstone <dsilvers@...tec.co.uk>
Cc:	Richard Hughes <hughsient@...il.com>, linux-acpi@...r.kernel.org,
	toshiba_acpi@...ebeam.org, linux-kernel@...r.kernel.org,
	len.brown@...el.com
Subject: Re: [PATCH] toshiba_acpi: Add full hotkey support

On Fri, Mar 06, 2009 at 10:04:21AM +0000, Daniel Silverstone wrote:
> On Fri, 2009-03-06 at 09:56 +0000, Matthew Garrett wrote:
> > Yes, it'll be as functional as it was previously. They can be remapped 
> > on machines that have a different keymap.
> 
> Since I don't understand the input layer well enough yet, can you
> confirm if it is possible to add new mappings in without changing the
> source? I.E. if laptop <foo> has another hotkey not yet considered, is
> it just an FDI for hal, or is it a source change in the kernel?

Yes, the remapping can be done from userspace.

> > > How will it interact with software stacks like HAL when the lock button
> > > is pressed?
> > I don't really understand the question?
> 
> It was more: will events come out of both the notify method *and*
> the /proc/acpi/toshiba/keys stuff, or will they only come out of the
> notify method if it can be enabled? (I'm just trying to establish that
> things polling /proc/acpi/toshiba/keys won't end up causing duplicated
> events).

Either the kernel or userspace will get the event, but not both. There's 
an argument for disabling the input code if /proc/acpi/toshiba/keys is 
open in order to avoid breaking anything that expects to get the code 
itself.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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