Re: [PATCH 1/4] Input: synaptics - add multitouch packet support

["Henrik Rydberg" <rydberg@euromail.se>]

On Sat, Dec 18, 2010 at 10:56:59AM -0600, Chris Bagwell wrote:
> On Sat, Dec 18, 2010 at 10:55 AM, Chris Bagwell <chris@cnpbagwell.com> wrote:
> > On Sat, Dec 18, 2010 at 8:52 AM, Henrik Rydberg <rydberg@euromail.se> wrote:
> >> From: Chase Douglas <chase.douglas@canonical.com>
> >>
> >> 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.

Not for all devices, it seems - at least not mine, which is not a clickpad.

Henrik
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