[PATCH 0/2] Synaptics absolute coordinate motion event support

[Joe Shaw]

Hi Peter,

On Sun, Oct 10, 2010 at 11:51 PM, Peter Hutterer
<peter.hutterer at who-t.net> wrote:
> On Fri, Oct 08, 2010 at 03:20:40PM -0400, Joe Shaw wrote:
>> Attached are a pair of patches which add support for absolute
>> coordinate motion events to the synaptics driver.  The first patch
>> allows Absolute to be passed into XSetDeviceMode() and the latter posts
>> absolute motion events using the raw X and Y coordinates rather than
>> computing deltas.
>
> I do wonder how many users actually use their touchpad in absolute mode.

Indeed, I doubt many, but these patches aren't academic.  I'm working
on a product which does use a touchpad in absolute mode.

> either way, with these patches the cursor jumps back to 0/screen height
> because the last four events sent by the device after releasing are
> xmin/ymax, resetting the cursor. Something's not quite right there, can you
> please check this again? thanks.

I saw something like this too on my device, but since we're also
working on the hardware I just fixed the firmware to not send an X,Y
of 0,0 when BTN_TOUCH is 0.

Do you see the xmin/ymax issue with evtest as well, or only through
"xinput test"?

>> I also have patches against the 1.2 branch -- this is the version that
>> I am currently using -- so it'd be good those could get applied too.
>
> 1.2 won't get new features. it's kinda the point of a stable branch.

Fair enough, I'll just patch it in.

Thanks,
Joe