I'm required for a project to have a 2mm glass shield over the official 7" touchscreen. With it in place, I obviously can't detect touch any longer (except when using 2 fingers at the same time but it is inconvenient)
Is there a clean way - Without having to fiddle with FT5406's internal I2C registers - to set the sensitivity of the touchscreen ?
I took a look at the driver, but there don't seems to be any parameters I can set:
pi@raspberrypi:~ $ modinfo rpi-ft5406 filename: /lib/modules/4.4.21-v7+/kernel/drivers/input/touchscreen/rpi-ft5406.ko license: GPL description: Touchscreen driver for memory based FT5406 author: Gordon Hollingworth srcversion: BFF35BF70365F2D3908ADB5 alias: of:N*T*Crpi,rpi-ft5406* depends: intree: Y vermagic: 4.4.21-v7+ SMP mod_unload modversions ARMv7
EDIT: After some investigations, it seems that the display version i'm using is 1.1. It uses a FT5426 touch driver chip which explain why I was unable to mess with the I2C register (The register datasheet for the FT5426 isn't available and it looks like it works differently from FT5406).