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SubjectRe: [PATCH 1/4] Input: synaptics - add multitouch packet support
On Sat, Dec 18, 2010 at 10:55 AM, Chris Bagwell <> wrote:
> On Sat, Dec 18, 2010 at 8:52 AM, Henrik Rydberg <> wrote:
>> From: Chase Douglas <>
>> Synaptics 2.7 series of touchpads support a mode for reporting 2 sets
>> of X/Y/Pressure data (multi-touch).  These same devices default mode
>> report single finger data and do not report finger counts.
>> Enabling MT mode makes finger count reporting start working in same
>> fashion as touchpads that claim that capability. Up to three fingers
>> can be reported this way.
>> While in MT mode and two or three fingers are touching, two sets of
>> data are sent.  The first is a new format buffer with lower resolution
>> reporting of stationary finger and the second is standard data format
>> reporting movement.
> We should probably update this comment and remove parts that mention
> stationary and movement.  It appears to be doing finger tracking and
> first packet is always first touch... except we are getting reports
> that clickpads/integrated button pads may not be consistently like
> this.

Sorry. Not first packet but higher resolution/second packet.

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