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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Message-ID: <m3vdghtuy1.fsf@intrepid.localdomain>
Date:	Tue, 08 Dec 2009 15:13:42 +0100
From:	Krzysztof Halasa <khc@...waw.pl>
To:	Mauro Carvalho Chehab <mchehab@...hat.com>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Andy Walls <awalls@...ix.net>,
	Jarod Wilson <jarod@...sonet.com>,
	Christoph Bartelmus <lirc@...telmus.de>, j@...nau.net,
	jarod@...hat.com, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
	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

Mauro Carvalho Chehab <mchehab@...hat.com> writes:

> With RC-5, you have no fields describing the remote. So, all the driver could
> do is an educated guess.

It can't even do that, e.g. single remotes (even the dumb ones) can send
different code groups (addresses) for different keys.

> IMO, the better is to have an API to allow creation of multiple interfaces
> per IR receiver, based on some scancode matching table and/or on some
> matching mask.

I think setting the keytables for each logical device would do.

I.e. just have a way to create additional logical devices. Each can have
its own keytable. The decoders would send their output to all logical
remotes, trying to match the tables etc.

> It should be possible to use the filter API to match different IR's by
> vendor/product on protocols that supports it,

That would mean unnecessary limiting.

> or to match address/command
> tuples on protocols where you just have those fields.

Precisely.
-- 
Krzysztof Halasa
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