linux-kernel - Re: [PATCH 2/3] hid: 3m: Convert to MT slots

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Date:	Mon, 20 Sep 2010 22:23:21 +0200
From:	Stéphane Chatty <chatty@...c.fr>
To:	Henrik Rydberg <rydberg@...omail.se>
Cc:	Jiri Kosina <jkosina@...e.cz>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] hid: 3m: Convert to MT slots

Le 20 sept. 10 à 22:04, Henrik Rydberg a écrit :
>>
>> What about this:
>> +            value = clamp_val(value, 0, MAX_SLOTS - 1);
>>              if (md->valid) {
>>                  md->curid = value;
>>                  md->f[value].touch = md->touch;
>>
>> If you had tracking IDs 59, 60 and 61 in the same frame, this  
>> would not work
>> properly would it?
>
>
> That is the slot id being set. The microtouch controller is also  
> using slots
> internally.
>

Oh, right. Once again back to your definition of tracking ID that is  
not so intuitive to me :-) In the end we might end up dealing with  
three IDs: the device's tracking ID, the slot ID, and the Linux  
tracking ID. Here, the first and the second are the same but will  
they always be? I remember when Stantum used to provide us with 16  
bit "device tracking IDs"...

Anyway, I have no more problem with this constant. Just with the  
vocabulary :-)

St.--
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