How do I make Xglamo read directly from the touchscreen?

Holger Freyther zecke at
Fri Dec 26 18:17:55 CET 2008

On Friday 26 December 2008 17:31:31 you wrote:
> On Fri, Dec 26, 2008 at 4:48 AM, Holger Freyther <zecke at> wrote:
> > On Friday 26 December 2008 06:24:21 Nelson Castillo wrote:
> >> Hello.
> >>
> >> With the latest kernel we can use the Touchscreen with no further
> >> user-space filtering. I'd like to test this.
> >
> >What is the benefit?
> Briefly stated: We think it's better if the driver sends only good data to
> the applications. If there are multiple distributions for a device (there
> are quite a few for the GTA02) they can share a tuned in-kernel
> configuration. We also save a lot of kernel mode/user mode transitions
> and data transmission allowing us to consider more samples for each
> reported event.

Ouch, this looks like a huge step backward. tslib has the stackable plugin 
architecture for a reason. Where is the connection between the input_handler 
for evdev and the calibration data?

It has so many layering violations that I don't know where to start and can 
just propose to do right mouse button emulation and sending of relative 
coordinates in kernel as well... But then you could just write another 
input_handler sending out PS2 compatible coordinates...

Where was this discussed?


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