linux-kernel - Re: [PATCH 2/7 v3] HID: magicmouse: simplify multitouch feature request

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Date:	Wed, 01 Sep 2010 15:14:18 +0200
From:	Henrik Rydberg <rydberg@...omail.se>
To:	Chase Douglas <chase.douglas@...onical.com>
CC:	Jiri Kosina <jkosina@...e.cz>, Michael Poole <mdpoole@...ilus.org>,
	Tejun Heo <tj@...nel.org>, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/7 v3] HID: magicmouse: simplify multitouch feature request

On 09/01/2010 02:34 PM, Chase Douglas wrote:

> On Wed, 2010-09-01 at 09:43 +0200, Henrik Rydberg wrote:
>> On 09/01/2010 03:56 AM, Chase Douglas wrote:
>>
>>> From: Chase Douglas <chase.douglas@...ntu.com>
>>>
>>> Only the first feature request is required to put the Magic Mouse into
>>> multitouch mode. This is also the case for the Magic Trackpad, for which
>>> support will be added in a later commit.
>>>
>>> Signed-off-by: Chase Douglas <chase.douglas@...onical.com>
>>> Acked-by: Michael Poole <mdpoole@...ilus.org>
>>> ---
>>
>>
>> Since this is starting to look awfully similar to the mode switch found in
>> appletouch and bcm5974, I wonder what happens to the stream from the device when
>> the connection to hid is closed. It could be that the mode switch should be
>> moved to open/close instead.
> 
> I don't really understand what you are proposing. It sounds like maybe
> you want the device to continue to function in a non-multitouch way
> after hid disconnection, but the device needs hid to function at all.


Suspend/resume, broken bt connections, etc. There was an issue with the bcm5974
macbook trackpads not functioning properly after a close unless returned to
normal mode. The mode switch code was moved to the open/close functions for that
reason.


> The closest thing I can think to what you are saying is to do whatever
> it takes on module removal so that it goes back to functioning in the
> non-multitouch mode. That may be possible.


Sounds like a good start. Doing a suspend test just now I could not get the
device up again, for whatever reason.

Henrik
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