HID: multitouch: fix Asus ExpertBook P2 P2451FA trackpoint

The HID descriptor of this device contains two mouse collections, one
for mouse emulation and the other for the trackpoint.

Both collections get merged and, because the first one defines X and Y,
the movemenent events reported by the trackpoint collection are
ignored.

Set the MT_CLS_WIN_8_FORCE_MULTI_INPUT class for this device to be able
to receive its reports.

This fix is similar to/based on commit 40d5bb87377a ("HID: multitouch:
enable multi-input as a quirk for some devices").

Link: https://gitlab.freedesktop.org/libinput/libinput/-/issues/825
Reported-by: Akito <the@akito.ooo>
Tested-by: Akito <the@akito.ooo>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 91a4d3fc30e0802a7e85acc94dbab98ef1d4f753..372cbdd223e09d2d919b40f74fcd2755789b306c 100644 (file)
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -1967,6 +1967,10 @@ static const struct hid_device_id mt_devices[] = {
                HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
                        USB_VENDOR_ID_ELAN, 0x313a) },
 
+       { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
+               HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
+                       USB_VENDOR_ID_ELAN, 0x3148) },
+
        /* Elitegroup panel */
        { .driver_data = MT_CLS_SERIAL,
                MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,