Hi Pavel,

Am 19.02.2017 um 23:39 schrieb Pavel Machek [off-list ref]:

Hi!

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And note that I am not making things different from others in tree,
I am making the tsc2007 right (incl. following the touchscreen
bindings which define the touchscreen size in "Pixels").

Your touch screen is not in any way special, so it has to behave in
the same way others do.

I agree, the tsc2007 (=what the interface provides to userspace) should
not behave special, for example it should behave like the virtual
touchscreen (=what the interface provides to userspace) virtualbox
gives. No need to be calibrated. Well, the internals are different. But
that is what the kernel is good for, abstract such things.
Conclusion: It cannot be totally wrong behavior to have pixel values
there.

It is not "totally wrong". But it is useless code that should not be
in kernel. Calibration certainly does not belong to single
_driver_.

It belongs to driver + attached panel. I.e. hardware. Which the kernel
or driver should IMHO abstract from as good as possible.

Feel free to submit driver

For what? The tsc2007 driver already exists.

but keep the calibration code out
of tree...

It is the really important patch to add this.

But if you have userspace that depends on touchscreen to be
calibrated... that _is_ wrong.

User-space people and real users have the opposite opinion. They
prefer if a touch is plug&play. I.e. without need for calibration.

When did you last time re-calibrate the heads of your hard disk in
user-space?

BR and thanks,
Nikolaus