Re: [PATCH v2] HID: multitouch: Add support for Google Whiskers Touchpad

[Jiri Kosina <jikos@kernel.org>]

On Thu, 21 Apr 2022, Benjamin Tissoires wrote:

> > > The Google Whiskers touchpad does not work properly with the default
> > > multitouch configuration. Instead, use the same configuration as Google
> > > Rose.
> > >
> > > Signed-off-by: Marek Maslanka <mm@semihalf.com>
> > > ---
> > >
> > > Changes in v2:
> > >   - As a HID device group use HID_GROUP_MULTITOUCH_WIN_8.
> > >
> > >  drivers/hid/hid-multitouch.c | 3 +++
> > >  1 file changed, 3 insertions(+)
> > >
> > > diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
> > > index 99eabfb4145b..87a92f2654c0 100644
> > > --- a/drivers/hid/hid-multitouch.c
> > > +++ b/drivers/hid/hid-multitouch.c
> > > @@ -2178,6 +2178,9 @@ static const struct hid_device_id mt_devices[] = {
> > >       { .driver_data = MT_CLS_GOOGLE,
> > >               HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
> > >                       USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
> > > +     { .driver_data = MT_CLS_GOOGLE,
> > > +             HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
> > > USB_VENDOR_ID_GOOGLE,
> > > +                     USB_DEVICE_ID_GOOGLE_WHISKERS) },
> >
> > This device is already claimed by google-hammer driver though ... ?
> 
> See my answer at [0].
> 
> hid-google-hammer entry is using the group HID_GROUP_GENERIC, and here
> we use HID_GROUP_MULTITOUCH_WIN_8, so the 2 are not stepping on each
> other's toes.
> 
> FWIW:
> Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
> 
> Cheers,
> Benjamin
> 
> [0] https://lore.kernel.org/linux-input/CAO-hwJ+18Ce_A8F-QVp=TJj2iu60r=f4MkrktYbou-rkXsj+mA@mail.gmail.com/

Gah, sorry, I missed that one. I've now applied the v2 patch.

-- 
Jiri Kosina
SUSE Labs