tslib yocto touch event is not working

mkrr

I'm trying to execute tslib in my yocto. The problem is that my touch screen is not recognized by the tslib (with ts_calibrate or ts_test).

If I use the evtest, it works perfectly, take a look:

ps: My device was recognized in "/dev/input/event0"

~# evtest
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0: cyttsp5_mt
/dev/input/event1: Logitech USB Receiver
/dev/input/event2: Logitech USB Receiver

I'm selecting the "zero" device:
...
Min 0
Max 1
Event code 57 (ABS_MT_TRACKING_ID)
Value 0
Min 0
Max 65535
Event code 58 (ABS_MT_PRESSURE)
Value 0
Min 0
Max 255
Properties:
Property type 1 (INPUT_PROP_DIRECT)
Property type 1 (INPUT_PROP_DIRECT)
Testing ... (interrupt to exit)
Event: time 1472308931.862872, type 3 (EV_ABS), code 57 (ABS_MT_TRACKING_ID), value 2
Event: time 1472308931.862872, type 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 92
Event: time 1472308931.862872, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 267
Event: time 1472308931.862872, type 3 (EV_ABS), code 58 (ABS_MT_PRESSURE), value 30
Event: time 1472308931.862872, type 3 (EV_ABS), code 48 (ABS_MT_TOUCH_MAJOR), value 12
Event: time 1472308931.862872, type 3 (EV_ABS), code 49 (ABS_MT_TOUCH_MINOR), value 12
Event: time 1472308931.862872, -------------- SYN_REPORT ------------
Event: time 1472308931.881448, type 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 93
...

I tried set the enviromental variables:
export TSLIB_TSEVENTTYPE=INPUT
export TSLIB_TSDEVICE=/dev/input/event0
export TSLIB_CALIBFILE=/etc/pointercal
export TSLIB_CONFFILE=/etc/ts.conf
export TSLIB_PLUGINDIR=/usr/lib/ts
export TSLIB_FBDEVICE=/dev/fb0
export TSLIB_CONSOLEDEVICE=none

I'm using QT5 to develop, and I'm starting the applications in this way.
export QWS_MOUSE_PROTO=tslib:/dev/input/event0
./app -platform eglfs "QWS_MOUSE_PROTO=tslib:/dev/input/event0"

My ts.conf file is:
/etc/ts.conf
module_raw input
module pthres pmin=1
module variance delta=30
module dejitter delta=100
module linear

I haven't any idea about the reason that it's not working.

SGaist

Hi,

You're mixing Qt 4 old architecture (QWS) and Qt 5. See here for input handling for Embedded Linux.

mkrr

@SGaist thank you. I did work the touchscreen on my Qt5 application, using this environment variable:

export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/event0

If I start the application: ./app -platform eglfs, the touch events are working now.

But the touch screen axes (X and Y) are inverted. I uninstalled the tslib and libinput package.
Some idea?

SGaist

You can try to add the rotate parameter to the plugin parameters. See on the same page of documentation I linked before

mkrr

Yes, the rotation can work. I tried this:

export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/event0:rotate=270

But, what is happening, is that the axes are inverted. Should be a way to calibrate the touchscreen (like ts_calibrate) to set correctly the axes. Appear that rotating will not to solve.

In my view, something like this, should be sufficient to tslib works.
export QT_QPA_EGLFS_DISABLE_INPUT=1
export TSLIB_TSDEVICE=/dev/input/event0
export QT_QPA_PLATFORM=eglfs

./app -plugin tslib

SGaist

If you want to use tslib you have to calibrate it and set all the environment variables related to it.

By the way, what about 90° ?

mkrr

If I rotate 90º, is not sufficient. Look the image attached.

The click on right top is correct. But, for example, if I click on position of the blue ball, the touch will recognize on position of the red ball.

It will be the same if I click on red ball (the touch will recognize the event on position of the blue ball)

SGaist

The direct upload function is currently broken so nobody but you can see the image. Can you post it on an image sharing site ?

mkrr

@SGaist link: https://www.dropbox.com/s/2qm6j1zd8f5kja7/click.png?dl=0

SGaist

After re-reading something's not clear. Did you re-try with tslib ?