linux-kernel - Re: [PATCHv4 2/5] HID: hid-input: Add suffix also for HID_DG

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Date:   Tue, 14 Dec 2021 13:35:06 +0100
From:   Benjamin Tissoires <benjamin.tissoires@...hat.com>
To:     Tero Kristo <tero.kristo@...ux.intel.com>
Cc:     "open list:HID CORE LAYER" <linux-input@...r.kernel.org>,
        Jiri Kosina <jikos@...nel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        lkml <linux-kernel@...r.kernel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Peter Hutterer <peter.hutterer@...-t.net>
Subject: Re: [PATCHv4 2/5] HID: hid-input: Add suffix also for HID_DG_PEN

On Fri, Dec 10, 2021 at 6:51 PM Tero Kristo <tero.kristo@...ux.intel.com> wrote:
>
>
> On 10/12/2021 18:21, Benjamin Tissoires wrote:
> >
> >
> > On Fri, Dec 10, 2021 at 12:12 PM Tero Kristo
> > <tero.kristo@...ux.intel.com> wrote:
> >>
> >> From: Mika Westerberg <mika.westerberg@...ux.intel.com>
> >>
> >> This and HID_DG_STYLUS are pretty much the same thing so add suffix for
> >> HID_DG_PEN too. This makes the input device name look better.
> >>
> >> While doing this, remove the suffix override from hid-multitouch, as it
> >> is now handled by hid-input. Also, the suffix override done by
> >> hid-multitouch was wrong, as it mapped HID_DG_PEN => "Stylus" and
> >> HID_DG_STYLUS => "Pen".
> >
> > FWIW, I was thinking at the following:
> > ---
> > diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
> > index 837585f4e673..fe0da7bf24a9 100644
> > --- a/drivers/hid/hid-input.c
> > +++ b/drivers/hid/hid-input.c
> > @@ -1775,6 +1775,15 @@ static struct hid_input
> > *hidinput_allocate(struct hid_device *hid,
> >                         suffix = "Mouse";
> >                         break;
> >                 case HID_DG_PEN:
> > +                       /*
> > +                        * yes, there is an issue here:
> > +                        *  DG_PEN -> "Stylus"
> > +                        *  DG_STYLUS -> "Pen"
> > +                        * But changing this now means users with
> > config snippets
> > +                        * will have to change it and the test suite
> > will not be happy.
> > +                        */
> > +                       suffix = "Stylus";
> > +                       break;
> >                 case HID_DG_STYLUS:
> >                         suffix = "Pen";
> >                         break;
> > ---
> >
> > Because the current patch breaks the test suite.
>
> Ah I see, do you want me to re-post in this form?

Nah, no need for a repost. I fixed the patch locally and pushed to
for-5.17/core.

Cheers,
Benjamin

>
> -Tero
>
> >
> > Cheers,
> > Benjamin
> >
> >>
> >> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> >> Signed-off-by: Tero Kristo <tero.kristo@...ux.intel.com>
> >> ---
> >>  drivers/hid/hid-input.c      | 1 +
> >>  drivers/hid/hid-multitouch.c | 3 ---
> >>  2 files changed, 1 insertion(+), 3 deletions(-)
> >>
> >> diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
> >> index ad718ceb8af3..78205e445652 100644
> >> --- a/drivers/hid/hid-input.c
> >> +++ b/drivers/hid/hid-input.c
> >> @@ -1741,6 +1741,7 @@ static struct hid_input
> >> *hidinput_allocate(struct hid_device *hid,
> >>                 case HID_GD_MOUSE:
> >>                         suffix = "Mouse";
> >>                         break;
> >> +               case HID_DG_PEN:
> >>                 case HID_DG_STYLUS:
> >>                         suffix = "Pen";
> >>                         break;
> >> diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
> >> index 082376a6cb3d..99eabfb4145b 100644
> >> --- a/drivers/hid/hid-multitouch.c
> >> +++ b/drivers/hid/hid-multitouch.c
> >> @@ -1606,9 +1606,6 @@ static int mt_input_configured(struct
> >> hid_device *hdev, struct hid_input *hi)
> >>         case HID_DG_STYLUS:
> >>                 /* force BTN_STYLUS to allow tablet matching in udev */
> >>                 __set_bit(BTN_STYLUS, hi->input->keybit);
> >> -               fallthrough;
> >> -       case HID_DG_PEN:
> >> -               suffix = "Stylus";
> >>                 break;
> >>         default:
> >>                 suffix = "UNKNOWN";
> >> --
> >> 2.25.1
> >>
> >
>