linux-kernel - Re: [RFC] What are the goals for the architecture of an in-kernel IR system?

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Message-ID: <4B1D94C4.3030102@redhat.com>
Date:	Mon, 07 Dec 2009 21:50:28 -0200
From:	Mauro Carvalho Chehab <mchehab@...hat.com>
To:	Christoph Bartelmus <lirc@...telmus.de>
CC:	jonsmirl@...il.com, awalls@...ix.net, dmitry.torokhov@...il.com,
	j@...nau.net, jarod@...hat.com, jarod@...sonet.com, khc@...waw.pl,
	kraxel@...hat.com, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
	superm1@...ntu.com
Subject: Re: [RFC] What are the goals for the architecture of an in-kernel
 IR  system?

Christoph Bartelmus wrote:
> Hi Jon,
> 
> on 04 Dec 09 at 19:28, Jon Smirl wrote:
>>> BTW, I just came across a XMP remote that seems to generate 3x64 bit
>>> scan codes. Anyone here has docs on the XMP protocol?
>> Assuming a general purpose receiver (not one with fixed hardware
>> decoding), is it important for Linux to receive IR signals from all
>> possible remotes no matter how old or obscure? Or is it acceptable to
> [...]
>> Of course transmitting is a completely different problem, but we
>> haven't been talking about transmitting. I can see how we would need
>> to record any IR protocol in order to retransmit it. But that's in the
>> 5% of users world, not the 90% that want MythTV to "just work".  Use
>> something like LIRC if you want to transmit.
> 
> I don't think anyone here is in the position to be able to tell what is  
> 90% or 5%.

True. Yet, cases like IR devices made by someone's own use is something
that we don't need to care to have an in-kernel driver.

> Personally I use LIRC exclusively for transmit to my settop box  
> using an old and obscure RECS80 protocol.
> No, I won't replace my setup just because it's old and obscure.
> 
> Cable companies tend to provide XMP based boxes to subscribers more often  
> these days. Simply not supporting these setups is a no-go for me.

I don't see any reason why not supporting STB protocols. Several such
hardware use Linux, anyway. So, eventually the STB manufacturers may send
us decoders that work with their IR's.

Cheers,
Mauro.



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