linux-kernel - Re: Support for synaptic touchscreen in HTC dream

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Message-ID: <5d5443650907151026y670087fesa3022e37f68e2d8@mail.gmail.com>
Date:	Wed, 15 Jul 2009 22:56:42 +0530
From:	Trilok Soni <soni.trilok@...il.com>
To:	Brian Swetland <swetland@...gle.com>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Pavel Machek <pavel@....cz>,
	"Arve Hj?nnev?g" <arve@...roid.com>,
	kernel list <linux-kernel@...r.kernel.org>,
	linux-input@...r.kernel.org, Andrew Morton <akpm@...l.org>
Subject: Re: Support for synaptic touchscreen in HTC dream

Hi Brian,

On Wed, Jul 15, 2009 at 9:03 PM, Brian Swetland<swetland@...gle.com> wrote:
> On Wed, Jul 15, 2009 at 8:27 AM, Dmitry
> Torokhov<dmitry.torokhov@...il.com> wrote:
>> On Wed, Jul 15, 2009 at 03:48:55PM +0200, Pavel Machek wrote:
>>> On Tue 2009-07-14 10:52:12, Dmitry Torokhov wrote:
>>> >
>>> > ABS_HAT is pretty unusual for a touchscreen...
>>>
>>> It is trying to do something useful for multitouch. People actually
>>> use multitouch on HTC dream. I guess I can strip it from version being
>>> merged...
>>
>> What about converting it to emit ABS_MT_* events added specifically
>> for the multitouch protocol?
>
> I believe at the time the driver was written, those events did not
> exist.  If the input framework has more appropriate events for the
> "2nd finger" (which is how synaptics represents MT on this panel), we
> should definitely switch to them.
>

Yes, MT events were added recently and they are working. Please check
this demo based on MT events.

http://www.linuxfordevices.com/c/a/News/Linux-multitouch-technology-demod/

Also, please confirm if polling mode is really used in some h/w
configuration, if not as said by Dmitry, we can remove it and do clean
integration with threaded irq.

-- 
---Trilok Soni
http://triloksoni.wordpress.com
http://www.linkedin.com/in/triloksoni
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