On Friday 12 November 2021, Benjamin Tissoires wrote:
> Hi Ondrej,
>
> On Fri, Nov 12, 2021 at 3:00 PM Ondrej Zary <linux@xxxxxxx> wrote:
> >
> > Iiyama ProLite T1931SAW does not work with Linux - input devices are
> > created but cursor does not move.
> >
> > It has the infamous 0eef:0001 ID which has been reused for various
> > devices before.
> >
> > It seems to require export_all_inputs = true.
> > Add it to mt_devices[] as MT_CLS_WIN_8 to fix the problem.
> > Hopefully there are no HID devices using this ID that will break.
> > It should not break non-HID devices (handled by usbtouchscreen).
>
> Hmm, this is worrisome. I am pretty sure there were some eGalax 0001
> devices that were Win 7 compatible and I am not sure if they are
> compatible with Win8...
>
> I guess that if you have to set MT_CLS_WIN_8, the device is not
> detected as such. so how about you use:
> MT_CLS_EXPORT_ALL_INPUTS instead, (to keep MT_CLS_DEFAULT for those
> devices), and restrict the VID/PID matching to the non Win8 devices:
It works with MT_CLS_EXPORT_ALL_INPUTS.
> HID_DEVICE(BUS_USB, HID_GROUP_GENERIC, USB_VENDOR_ID_DWAV,
> USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER)
But does not match HID_GROUP_GENERIC.
>
> ?
>
> Cheers,
> Benjamin
>
> >
> > Signed-off-by: Ondrej Zary <linux@xxxxxxx>
> > ---
> > drivers/hid/hid-multitouch.c | 5 +++++
> > 1 file changed, 5 insertions(+)
> >
> > diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
> > index e1afddb7b33d..099daf590392 100644
> > --- a/drivers/hid/hid-multitouch.c
> > +++ b/drivers/hid/hid-multitouch.c
> > @@ -1888,6 +1888,11 @@ static const struct hid_device_id mt_devices[] = {
> > MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
> > USB_DEVICE_ID_CVTOUCH_SCREEN) },
> >
> > + /* eGalax devices (SAW) */
> > + { .driver_data = MT_CLS_WIN_8,
> > + MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
> > + USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER) },
> > +
> > /* eGalax devices (resistive) */
> > { .driver_data = MT_CLS_EGALAX,
> > MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
> > --
> > Ondrej Zary
> >
>
>
--
Ondrej Zary
