[Bugme-new] [Bug 18062] New: Multitouch support for Synaptics V7.4 Touchpads

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Wed Sep 8 00:31:26 PDT 2010


           Summary: Multitouch support for Synaptics V7.4 Touchpads
           Product: Drivers
           Version: 2.5
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Input Devices
        AssignedTo: drivers_input-devices at kernel-bugs.osdl.org
        ReportedBy: tobynbertram at hotmail.com
        Regression: No

Created an attachment (id=29262)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=29262)
Synaptics Multitouch Initialization

I was inspired by Andrew Skalski's work that he did for the Alps touchpad in
Bug # 14660.  So I used the same technique to find the multitouch
initialization sequence for the Synaptics Clickpad touchpad in my HP dv7t
Select laptop.  I have attached the initialization sequence exchanged between
the Windows 7 Synaptics driver and the touchpad as well as a script that I
borrowed from Andrew Skalski's work that makes it easy to send the
initialization sequence to the touchpad and monitor the response.

I haven't  figured out the new 12 byte protocol yet but here are a few quick
1)One finger contact utilizes the same 6 byte absolute format that is detailed
in the Synaptics PS/2 interfacing guide.  A new 12 byte protocol is used
whenever 2 or more fingers are used.
2)The touchpad can report the contact of 1, 2, or 3 fingers.
3)X and Y coordinates for 2 points on the touchpad are provided.

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