linux-kernel - Re: [RFC] Should we create a raw input interface for IR's ? - Was: Re: [PATCH 1/3 v2] lirc core device driver infrastructure

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Date:	Thu, 26 Nov 2009 00:08:04 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Christoph Bartelmus <lirc@...telmus.de>
Cc:	jarod@...sonet.com, awalls@...ix.net, j@...nau.net,
	jarod@...hat.com, khc@...waw.pl, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
	mchehab@...hat.com, superm1@...ntu.com
Subject: Re: [RFC] Should we create a raw input interface for IR's ? - Was:
	Re: [PATCH 1/3 v2] lirc core device driver infrastructure

On Thu, Nov 26, 2009 at 09:01:00AM +0100, Christoph Bartelmus wrote:
> Hi,
> 
> on 25 Nov 09 at 12:44, Jarod Wilson wrote:
> [...]
> > Ah, but the approach I'd take to converting to in-kernel decoding[*] would
> > be this:
> [...]
> > [*] assuming, of course, that it was actually agreed upon that in-kernel
> > decoding was the right way, the only way, all others will be shot on sight.
> 
> I'm happy to see that the discussion is getting along.
> But I'm still a bit hesitant about the in-kernel decoding. Maybe it's just  
> because I'm not familiar at all with input layer toolset.
> 
> 1. For sure in-kernel decoding will require some assistance from userspace  
> to load the mapping from IR codes to keys. So, if there needs to be a tool  
> in userspace that does some kind of autodetection, why not have a tool  
> that does some autodetection and autoconfigures lircd for the current  
> device. Lots of code duplication in kernel saved. What's the actual  
> benefit of in-kernel decoding?

Why are you mixing configuration and decoding? Configuration I expect
will be done with the help of userspace. Udev is probably the best
place.

> 
> 2. What would be the format of the key map? lircd.conf files already exist  
> for a lot of remote controls. Will we have a second incompatible format to  
> map the keys in-kernel? Where are the tools that create the key maps for  
> new remotes?
> 

Same as the keymaps for the other input devices I'd expect.

> Maybe someone can shed some light on this.
> 
> Christoph

-- 
Dmitry
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