Am 20.02.2017 um 21:22 schrieb H. Nikolaus Schaller [off-list ref]:

Hi,

quoted

Am 20.02.2017 um 20:32 schrieb Pavel Machek [off-list ref]:

Hi!

quoted

quoted

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.

Some people prefer to calibrate their touchscreens; because of
per-device variations, that gives better precision.

You can pass default calibration data from device tree to kernel to
userland. But you can not force people to use that calibration.

Yes, you can do that if you want. I hope it became clear by the formula
in my last mail.

Sorry this can be completely misleading, if read in conjunction with your
sentences. Brevity in answers may disturb the message.

It does not mean that you can and should force people to use that calibration...

It means that users still can do per-device calibration and do not have
to use the pre-calibration capability of the driver. Hence we called it
pre-calibration.

I just want to be able to do it the other way for those users who don't
care about this per-device variation.

BR,
Nikolaus

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