On 22/04/16 12:00, Neil Jerram wrote:
On 21/04/16 20:04, Neil Jerram wrote:On 21/04/16 13:08, Neil Jerram wrote:Has anyone tried configuring the GTA04 touchscreen to behave as a touchpad instead of a touchscreen? Would the kernel code for the touchscreen support that?Subject to the latter, I think the former is possible in principle by using libinput and configuring a udev rule like this: ACTION=="add|change", KERNEL=="event[0-9]*", ENV{ID_VENDOR_ID}=="...", ENV{ID_MODEL_ID}=="...b", ENV{ID_INPUT_TOUCHSCREEN}="", ENV{ID_INPUT_TOUCHPAD}="1"Well, unfortunately it does not work. Xorg.0.log says:[ 19.473] (II) input device 'TSC2007 Touchscreen', /dev/input/event0 is tagged by udev as: Touchpad Touchscreen [ 19.473] (EE) kernel bug: device TSC2007 Touchscreen failed touchpad sanity checks [ 19.473] (II) input device 'TSC2007 Touchscreen', /dev/input/event0 is a touchpad[ 19.540] (II) failed to create input device '/dev/input/event0'.I guess libinput is expecting some minimal characteristics for a 'touchpad', and the TSC2007 kernel driver doesn't provide those. Pity, because I would like to see if it was usable that way.Yes, libinput checks for ABS_X, BTN_TOUCH and BTN_TOOL_FINGER. The driver provides ABS_X and BTN_TOUCH but not BTN_TOOL_FINGER.It looks like a trivial change to get the driver to advertise BTN_TOOL_FINGER, so I plan to try that next. If it works we could implement a driver option for it, so as to allow either touchscreen or touchpad use.
Just hit a further problem here: the amd64->armhf cross-compilation toolchain now in Debian is GCC 5, but the kernel back at 3.17 didn't support building with GCC 5. Is there a much more recent kernel - since whenever the GCC 5 support was added - that more or less runs correctly on the GTA04?
Thanks,
Neil
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