linux-kernel - Re: [PATCH 0/4] Alternative approach to MT_TOOL

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Message-ID: <4D0897F3.7040500@bitmath.org>
Date:	Wed, 15 Dec 2010 11:26:59 +0100
From:	Henrik Rydberg <rydberg@...math.org>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	Chase Douglas <chase.douglas@...onical.com>,
	Chris Bagwell <chris@...bagwell.com>,
	Peter Hutterer <peter.hutterer@...-t.net>,
	linux-input <linux-input@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/4] Alternative approach to MT_TOOL_ENVELOPE

>> Ping has touched upon this subject as well, from the pen & touch perspective.
>> Generally, some ABS axes are actually enumerations, for which we have no
>> direct abstraction. If we had a way to declare the used values for such
>> enumerations, it would resolve these and possibly other issues.

> I think that presence of pen/touch can be detected by having
> BTN_TOOL_PEN and BTN_TOOL_FINGER. However in this case the tool is
> finger, so I do not think we should introduce BTN_TOOL_ENVELOPE. Maybe
> this is another case where we should employ the proposed device flags?

Yes. Having something like INPUT_QUIRK_SEMI_MT might be enough, and we could
drop the whole MT_TOOL_ENVELOPE circus. Chase, Peter, Chris, would you be
comfortable with such a solution?

> Anyway, it looks like we have a few concerns with current
> MT_TOOL_ENVELOPE so I want to rewind my 'next' branch.

Yep. Should I also take the opportunity to sync from -rc1 instead, and fold the
cleanup patches into the appropriate places?

Thanks,
Henrik

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