linux-kernel - Re: [PATCH] dell-wmi: Add events created by Dell Rugged 2-in-1s

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Message-ID: <20160727163857.GA2565@f23x64.localdomain>
Date:	Wed, 27 Jul 2016 09:38:57 -0700
From:	Darren Hart <dvhart@...radead.org>
To:	Pali Rohár <pali.rohar@...il.com>
Cc:	Mario_Limonciello@...l.com, linux-kernel@...r.kernel.org,
	platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH] dell-wmi: Add events created by Dell Rugged 2-in-1s

On Wed, Jul 27, 2016 at 06:05:57PM +0200, Pali Rohár wrote:
> On Wednesday 27 July 2016 17:55:09 Mario_Limonciello@...l.com wrote:
> > > Hi! I'm not sure if KEY_PROG1/2/3 are good names here as we already
> > > use
> > >
> > >those for other actions (see bios_to_linux_keycode). Also there is:
> > I had missed this, do you have some recommendations on what would be
> > better codes to map this to?
> 
> Problem is that I do not know when those KEY_PROG keys from 
> bios_to_linux_keycode table are emitted. There are missing comments or 
> description.
> 
> Are you able to find out description for all those keys in that table? 
> Maybe now (when linux key constants are extended), there could be better 
> candidates...
> 
> > I'll double check what the things that "were" mapping to KEY_PROG1
> > etc actually were.  This might be a case of an expected clash if the
> > functions aren't in current generations.
> > 
> > >/* Wifi Catcher */
> > >
> > > { KE_KEY,    0xe011, { KEY_PROG2 } },
> > 
> > It's worth mentioning that Wifi Catcher hasn't been used for any Dell
> > laptops for a handful generations.  The rugged 2in1's are current
> > generation that have these programmable buttons and don't have wifi
> > catcher.
> 
> Anyway, what is "Wifi Catcher"? HW switch buttton which enable/disable 
> wifi? Or something else?
> 
> > So there should be no "real" clash here.
> 
> Problem can be in future. This driver is unified for all Dell products 
> with wmi interface and so future product could do some nasty things...

I suggest not worrying too much about unknown future platforms when it comes to
things like key names, we cannot predict this, and can address it when/if it
becomes a problem.



-- 
Darren Hart
Intel Open Source Technology Center