linux-kernel - Re: [PATCH v2] Input: synaptics

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Date:	Thu, 19 Jul 2012 15:14:39 +0200
From:	"Henrik Rydberg" <rydberg@...omail.se>
To:	Chung-Yih Wang (王崇懿) <cywang@...gle.com>
Cc:	Chase Douglas <chase.douglas@...onical.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Daniel Kurtz <djkurtz@...omium.org>,
	JJ Ding <dgdunix@...il.com>, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] Input: synaptics - use firmware data for Cr-48

>    Thanks for your great comments. You are right, it is impossible to get
>  correct finger tracking if both fingers are moving. However, we think it
> still worth to have the firmware tracking of the fingers as they could
> perform well for most one-stationary-one-moving cases. This will be good
> enough for the one-stationary-one-moving gestures we want to provide on
> Cr-48. And that's why we want to make the patch specific to Cr-48.

If one finger is stationary, it is trivial to find out where the other
finger is using the available semi-mt data.

The general feeling about this patch is that it is very similar to
where we started off two years ago. The problems we saw then led to
the implementation of the semi-mt protocol. I doubt things have
changed much since then.

Thanks,
Henrik
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