linux-kernel - Re: [PATCH] HID: multitouch: Apply MT_QUIRK_CONFIDENCE quirk for multi-input devices

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Message-ID: <CAAd53p4JHX5R1KxSuz_PMsdJiZ85rnJR_LwG-RmgNs-0hKubrQ@mail.gmail.com>
Date:   Tue, 19 Jan 2021 01:45:30 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc:     Jiri Kosina <jikos@...nel.org>,
        "open list:HID CORE LAYER" <linux-input@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] HID: multitouch: Apply MT_QUIRK_CONFIDENCE quirk for
 multi-input devices

Hi,

On Mon, Jan 18, 2021 at 10:41 PM Benjamin Tissoires
<benjamin.tissoires@...hat.com> wrote:
>
> Hi,
>
> On Mon, Jan 18, 2021 at 2:45 PM Kai-Heng Feng
> <kai.heng.feng@...onical.com> wrote:
> >
> > Palm ejection stops working on some Elan and Synaptics touchpad after
> > commit 40d5bb87377a ("HID: multitouch: enable multi-input as a quirk for
> > some devices").
> >
> > The commit changes the mt_class from MT_CLS_WIN_8 to
> > MT_CLS_WIN_8_FORCE_MULTI_INPUT, so MT_QUIRK_CONFIDENCE isn't applied
> > anymore.
> >
> > So also apply the quirk since MT_CLS_WIN_8_FORCE_MULTI_INPUT is
> > essentially MT_CLS_WIN_8.
> >
> > Fixes: 40d5bb87377a ("HID: multitouch: enable multi-input as a quirk for some devices")
> > Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
>
> Thanks for the patch.
>
> IIt seems I was too lazy to write a regression test for it, and this
> strikes back.
> Can you also work on a regression test for this at
> https://gitlab.freedesktop.org/libevdev/hid-tools ?

Of course. I'll do it later this week. Currently I have both affected
Elan and Synaptics touchpad in hand.
Will this be a blocker of getting the patch merged?

Kai-Heng

>
> Cheers,
> Benjamin
>
>
>
>
> > ---
> >  drivers/hid/hid-multitouch.c | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
> > index 0743ef51d3b2..8429ebe7097e 100644
> > --- a/drivers/hid/hid-multitouch.c
> > +++ b/drivers/hid/hid-multitouch.c
> > @@ -758,7 +758,8 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
> >                         MT_STORE_FIELD(inrange_state);
> >                         return 1;
> >                 case HID_DG_CONFIDENCE:
> > -                       if (cls->name == MT_CLS_WIN_8 &&
> > +                       if ((cls->name == MT_CLS_WIN_8 ||
> > +                            cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT) &&
> >                                 (field->application == HID_DG_TOUCHPAD ||
> >                                  field->application == HID_DG_TOUCHSCREEN))
> >                                 app->quirks |= MT_QUIRK_CONFIDENCE;
> > --
> > 2.29.2
> >
>