linux-kernel - Re: [RFC v2] input: Introduce device information ioctl

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Date:	Thu, 16 Dec 2010 08:43:02 +0100
From:	Henrik Rydberg <rydberg@...omail.se>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	Chase Douglas <chase.douglas@...onical.com>,
	Jiri Kosina <jkosina@...e.cz>, Ping Cheng <pingc@...om.com>,
	Chris Bagwell <chris@...bagwell.com>,
	Peter Hutterer <peter.hutterer@...-t.net>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC v2] input: Introduce device information ioctl

>>> As an example of how this would work for the

>>> touchpad/tablet/touchscreen triplet, there are two properties defined,
>>> INPUT_PROP_POINTER and INPUT_PROP_DIRECT. A touchpad is an indirect
>>> pointer device, a tablet is a direct pointer device, and the
>>> touchscreen is simply a direct device.
>>>
>>> What do you think?
>>
>> I must have missed the first version of this patch, but I give two
>> thumbs way up :). The detection code for touchpad/tablet/touchscreen in
>> xf86-input-evdev is large and unwieldy, and seemingly simple changes to
>> an input driver can cause incorrect interpretation. Having this
>> available should help quite a bit!
>>
>> Acked-by: Chase Douglas <chase.douglas@...onical.com>
> 
> As long as we document that !pointer && !direct means "unknown" or
> "unspecified" so as to avoid having to update all devices at once that
> should be OK.
> 
> We also need to wire up uinput.


Great, will cook a proper patch.

Thanks,
Henrik
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