linux-kernel - Re: [PATCH 12/20] Input: atmel_mxt_ts

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Message-ID: <4F689E9F.90902@itdev.co.uk>
Date:	Tue, 20 Mar 2012 08:13:35 -0700
From:	Nick Dyer <nick.dyer@...ev.co.uk>
To:	Daniel Kurtz <djkurtz@...omium.org>
CC:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Joonyoung Shim <jy0922.shim@...sung.com>,
	Iiro Valkonen <iiro.valkonen@...el.com>,
	Henrik Rydberg <rydberg@...omail.se>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Benson Leung <bleung@...omium.org>,
	Yufeng Shen <miletus@...omium.org>,
	"Bowens, Alan" <Alan.Bowens@...el.com>,
	"Tiwari, Atul" <Atul.Tiwari@...el.com>
Subject: Re: [PATCH 12/20] Input: atmel_mxt_ts - simplify event reporting

Daniel Kurtz wrote:
> Instead of carrying around per-finger state in the driver instance, just
> report each finger as it arrives to the input layer, and let the input
> layer (evdev) hold the event state (which it does anyway).
>
> Also, the atmel pad reports "amplitude", which is reported to userspace
> using the "PRESSURE" event type.  The variables now reflect this.
> 
> Note: this driver does not really do MT-B properly. Each input report
> (a goup of input events followed by a SYN_REPORT) only contains data for
> a single contact.  When multiple fingers are present on a device, each is
> properly reported in its own MT_SLOT.  However, there is only ever one
> MT_SLOT per SYN_REPORT.  This is fixed in a subsequent patch.
> 
> Signed-off-by: Daniel Kurtz <djkurtz@...omium.org>

This seems to be a good improvement, assuming it is valid. Which platforms
have you tested it on?

-- 
Nick Dyer
Software Engineer, ITDev Ltd
Hardware and Software Development Consultancy
Website: http://www.itdev.co.uk
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