linux-kernel - Re: [PATCH 0/2] wistron

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Date:	Mon, 19 Mar 2007 17:28:06 -0400
From:	"Dmitry Torokhov" <dmitry.torokhov@...il.com>
To:	"Éric Piel" <Eric.Piel@...mplin-utc.net>
Cc:	"Vojtech Pavlik" <vojtech@...e.cz>, mitr@...ny.cz, otauber@....de,
	linux-kernel@...r.kernel.org,
	linux-input <linux-input@...ey.karlin.mff.cuni.cz>
Subject: Re: [PATCH 0/2] wistron_btns: More keymaps

On 3/15/07, Éric Piel <Eric.Piel@...mplin-utc.net> wrote:
> 03/14/2007 08:02 PM, Vojtech Pavlik wrote/a écrit:
> > On Wed, Mar 14, 2007 at 02:58:49PM -0400, Dmitry Torokhov wrote:
> >
> >>>> 2. I also have a concern about using KEY_SCREEN to signal toggling
> >>>> display on and off. I am CCing Vojtech - he must know what the
> >>>> original intent of this key code was. BTW, when user presses
> >>>> corresponding button - does the display actually goes off? Maybe we
> >>>> need another switch.
> >>> Sorry, Dmitry, I probably should have documented it back then, I don't
> >>> have the slightest idea anymore.
> >>>
> >> That's what I was afraid of ;) Well, maybe we should just use it to
> >> indicate display switch and add a comment to that effect to input.h...
> >
> > Digging somewhat deeper into my memory, I think it just so happened that
> > there was a keyboard with a key with a pictogram of a computer screen on
> > it with no really defined purpose. Since at that time there was only a
> > limited number of different extended keyboard types, it was added.
> >
> > I think it'd make sense to use it eg. for the key that switches between
> > internal and external output on laptops, if the laptop generates a
> > keycode for the key at all. But maybe that function is already taken by
> > KEY_SWITCHVIDEOMODE ...
>
> Ok, so let me summarize:
>
> There are two kinds of keys on those laptops (for which we are not sure
> about the keycode that it should generate):
> * Laptop screen on/off
> * Display output selection (for instance: laptop/external/both)
>
> The possible keycodes that we could assign to them:
> KEY_SCREEN
> KEY_MEDIA
> KEY_MODE
> KEY_VIDEO
> KEY_SWITCHVIDEOMODE
> KEY_COMPUTER
> KEY_PC
>
>  From the discussion, I had the feeling this association would be the
> less incorrect:
> Screen on/off : KEY_SCREEN

It looks like DVB folks chose to ise KEY_SCREEN and KEY_WINDOW to
switch applications between full screen and windowed modes so we'll
have to invent our own keycode. KEY_DISPLAYTOGGLE anyone?

> Display selection : KEY_SWITCHVIDEOMODE
>

I agree here.

-- 
Dmitry
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