linux-kernel - Re: [PATCH 2/3] Input: synaptics - add multi-finger and semi-mt support

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Date:	Tue, 21 Dec 2010 12:32:38 -0500
From:	Chase Douglas <chase.douglas@...onical.com>
To:	Henrik Rydberg <rydberg@...omail.se>
CC:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Jiri Kosina <jkosina@...e.cz>, Takashi Iwai <tiwai@...e.de>,
	Chris Bagwell <chris@...bagwell.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] Input: synaptics - add multi-finger and semi-mt support

On 12/21/2010 11:59 AM, Henrik Rydberg wrote:
>>> Reported-by: Tobyn Bertram
>>> Not-yet-signed-off-by: Takashi Iwai <tiwai@...e.de>
>>> Not-yet-signed-off-by: Chase Douglas <chase.douglas@...onical.com>
>>> Not-yet-signed-off-by: Chris Bagwell <chris@...bagwell.com>
>>> Signed-off-by: Henrik Rydberg <rydberg@...omail.se>
>>
>> You can keep my SOB.
> 
> Great, thanks.
>  
>>> +static void set_slot(struct input_dev *dev, int slot, bool active, int x, int y)
>>> +{
>>> +	input_mt_slot(dev, slot);
>>> +	input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
>>> +	if (active) {
>>> +		input_report_abs(dev, ABS_MT_POSITION_X, x);
>>> +		input_report_abs(dev, ABS_MT_POSITION_Y,
>>> +				 YMAX_NOMINAL + YMIN_NOMINAL - y);
>>> +	}
>>> +}
>>
>> I take it that you feel MT_TOOL_FINGER should always be set, even if
>> it's always the same as BTN_TOOL_*? I just want to be sure this is
>> intended so we document it appropriately.
> 
> Yes - the MT_TOOLs are only emitted when explicitly set in absbit, but
> the internal interface always handles it. This is actually documented
> in the code (and DocBook).

Ahh, I had forgotten about this.

>>> @@ -623,6 +686,7 @@ static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
>>>  	int i;
>>>  
>>>  	__set_bit(INPUT_PROP_POINTER, dev->propbit);
>>> +	__set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
>>
>> Shouldn't this only be set when SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) is
>> true?
> 
> Indeed - thanks.

All looks good to me with this change :). Thanks again!

-- Chase
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