linux-kernel - Re: [PATCH] Input: MT - Add support for balanced slot assignment

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Message-ID: <20150122200252.GE18153@dtor-ws>
Date:	Thu, 22 Jan 2015 12:02:52 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Henrik Rydberg <rydberg@...math.org>
Cc:	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	Peter Hutterer <peter.hutterer@...-t.net>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Input: MT - Add support for balanced slot assignment

On Thu, Jan 22, 2015 at 08:52:25PM +0100, Henrik Rydberg wrote:
>  int input_mt_assign_slots(struct input_dev *dev, int *slots,
> -			  const struct input_mt_pos *pos, int num_pos)
> +			  const struct input_mt_pos *pos, int num_pos,
> +			  int dmax)

Should dmax be unsigned and do we really need to treat 0 specially or we
could use UNIT_MAX as "don't care" value?

>  {
>  	struct input_mt *mt = dev->mt;
> +	int mu = 2 * dmax * dmax;

For my education, what does "mu" stand for? Ideally, if someone could create a
write-up on the contact matching that would be most awesome.

Thanks.

-- 
Dmitry
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