By default, touch input in GDP is not working, when building from genivi-demo-platform.git
LayerManager is configured to allow touch input on the hmi-launcher, and weston is recognising
a touch device, for example weston-calibrator can be demonstrated.
GDP '8' is built with weston-1.5, which is known to have issues in QT5 for touch, with evdev:
*Updated in comments*