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 10:14:14 +0100
From:	Gerd Hoffmann <kraxel@...hat.com>
To:	Jarod Wilson <jarod@...sonet.com>
CC:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Andy Walls <awalls@...ix.net>,
	Christoph Bartelmus <lirc@...telmus.de>, khc@...waw.pl,
	j@...nau.net, jarod@...hat.com, 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 11/26/09 07:23, Jarod Wilson wrote:
> Well, when mythtv was started, I don't know that there were many
> input layer remotes around... lirc was definitely around though.

lirc predates the input layer IR drivers by years, maybe even the input 
layer itself.

The main reason for the input layer IR drivers appearing was lirc not 
being mainline.  A in-kernel driver (bttv in that case) which depends on 
a out-of-tree subsystem for IR support was simply a pain in the ass for 
both maintainer (/me back then) and users.

At least for IR hardware which allows access to the raw samples it 
certainly makes sense to support lirc, additional to the current (or 
improved) input layer support.

> The lirc support in mythtv actually relies on mapping remote button
> names as defined in lircd.conf to keyboard key strokes. As mentioned
> elsewhere in this beast of a thread, mythtv doesn't currently support
> things like KEY_PLAY, KEY_VOLUMEUP, KEY_CHANNELUP, etc. just yet, but
> I intend on fixing that...

lircd can handle the input layer as input as well, so you actually can 
remap things via lircd even for pure input layer drivers.  mythtv 
handling KEY_VOLUMEUP directly would be more elegant though.

cheers,
   Gerd

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