linux-kernel - Re: [PATCH] input: mt: Interface and MT

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Message-ID: <20101210185041.GC1630@core.coreip.homeip.net>
Date:	Fri, 10 Dec 2010 10:50:42 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Ping Cheng <pinglinux@...il.com>
Cc:	Henrik Rydberg <rydberg@...omail.se>,
	Jiri Kosina <jkosina@...e.cz>, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] input: mt: Interface and MT_TOOL documentation updates

On Fri, Dec 10, 2010 at 10:13:06AM -0800, Dmitry Torokhov wrote:
> On Fri, Dec 10, 2010 at 09:55:12AM -0800, Ping Cheng wrote:
> > On Thu, Dec 9, 2010 at 1:22 PM, Henrik Rydberg <rydberg@...omail.se> wrote:
> > > +
> > > +- The MT_TOOL_ENVELOPE type is used to indicate that the contact position
> > > +is not well-defined, and is only used for legacy hardware. The real contact
> > > +positions are to be found within the bounding rectangle formed by the
> > > +envelope contact positions.
> > 
> > Can we make MT_TOOL_ENVELOPE cover a bit more cases by:
> > 
> > 1. Removing ", and is only used for legacy hardware";
> > 2. Adding "Or the number of contacts inside the bounding rectangle is
> > reported if hardware provides the number but not the real contact
> > positions" to the end of the paragraph.
> 
> Are you saying that there is upcoming hardware models that do not report
> individual contacts?
> 

Anyway, if we plot the evolution of hardware:

	ST -> ST + #fingers -> Envelope -> Full MT

I think we can rigthfully say that at this time all hardware that is not
full MT is legacy technology...

-- 
Dmitry
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