[Wayland-bugs] [Bug 54428] New: Multitouch touch screen is detected as a pointer device by evdev_configure_device()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=54428

             Bug #: 54428
           Summary: Multitouch touch screen is detected as a pointer
                    device by evdev_configure_device()
    Classification: Unclassified
           Product: Wayland
           Version: unspecified
          Platform: ARM
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: weston
        AssignedTo: wayland-bugs at lists.freedesktop.org
        ReportedBy: abhijitpotnis at gmail.com
                CC: ppaalanen at gmail.com


Created attachment 66535
  --> https://bugs.freedesktop.org/attachment.cgi?id=66535
evtest run dump.

Hello,

I use a eGalax Multitouch Screen. When running weston, the screen is detected
as a pointer device. The ABS_MT event packets are hence ignored as
evdev_process_absolute_motion() as it only listens to ABS_ event packets. When
eGalax is forcefully set to be a MT touch device by overriding the "if" loop in
evdev.c (ref, below), the touch works fine. In my case that ABS_MT_SLOT is not
set, is that a device driver issue ? or are we doing something different in
evdev.c ?
Should we be checking for SYN_MT_REPORT bit for devices handling anonymous
contacts and not just ABS_MT_SLOT?

static int
evdev_configure_device(struct evdev_device *device){
...

if (TEST_BIT(abs_bits, ABS_MT_SLOT)) {
..
}



wayland: commit c855d6eec4c5e63489da5bc08451a2376e6d2aea
weston : commit 5418a904ca007a109f6af8c0c75ca97a134986d9

Weston Log

[01:04:32.578] input device eGalax Touch Screen, /dev/input/event1 is a pointer
[01:04:32.578] Creating evdev device on '/dev/input/event1'.

Attached along is the evtest dump for eGalax touch screen

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.