linux-kernel - Re: [PATCH v4] HID: add KEY_CAMERA

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Date:   Thu, 16 Feb 2023 19:37:51 +0800
From:   qi feng <fengqi706@...il.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     jikos@...nel.org, benjamin.tissoires@...hat.com,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        fengqi <fengqi@...omi.com>
Subject: Re: [PATCH v4] HID: add KEY_CAMERA_FOCUS event in HID

Is there something wrong with this, I can correct it

Greg KH <gregkh@...uxfoundation.org> 于2023年2月16日周四 18:18写道：
>
> On Thu, Feb 16, 2023 at 04:48:30PM +0800, Qi Feng wrote:
> > From: fengqi <fengqi@...omi.com>
> >
> > Our HID device need KEY_CAMERA_FOCUS event to control camera,
> > but this event is non-existent in current HID driver.
> > So we add this event in hid-input.c.
> >
> > Signed-off-by: fengqi <fengqi@...omi.com>
> >
> > ---
> > changes in v4:
> >
> > -add HID_UP_CAMERA in HID usage tables , Then add the mapping under HID_UP_CAMERA
> > -modify the commit log of patch
> > -Link to v3:https://lore.kernel.org/linux-input/9a85b268c7636ef2e4e3bbbe318561ba2842a591.1676536357.git.fengqi@xiaomi.com/T/#u
> > -Link to v2:https://lore.kernel.org/linux-input/CACOZ=ZU0zgRmoRu8X5bMUzUrXA9x-qoDJqrQroUs=+qKR58MQA@mail.gmail.com/T/#t
> > -Link to v1:https://lore.kernel.org/linux-input/CACOZ=ZWB3grJKn7wAZEZ0BDyN7KJF4VWUTNs-mPxeoW_oiR7=g@mail.gmail.com/T/#t
> > ---
> >  drivers/hid/hid-input.c | 10 ++++++++++
> >  include/linux/hid.h     |  1 +
> >  2 files changed, 11 insertions(+)
> >
> > diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
> > index 77c8c49852b5..c6098ae2fac7 100644
> > --- a/drivers/hid/hid-input.c
> > +++ b/drivers/hid/hid-input.c
> > @@ -1225,6 +1225,16 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
> >                       return;
> >               }
> >               goto unknown;
> > +     case HID_UP_CAMERA:
> > +             switch (usage->hid & HID_USAGE) {
> > +             case 0x020:
> > +                     map_key_clear(KEY_CAMERA_FOCUS);        break;
> > +             case 0x021:
> > +                     map_key_clear(KEY_CAMERA);              break;
> > +             default:
> > +                     goto ignore;
> > +             }
> > +             break;
> >
> >       case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
> >               set_bit(EV_REP, input->evbit);
> > diff --git a/include/linux/hid.h b/include/linux/hid.h
> > index 8677ae38599e..88793b77bd63 100644
> > --- a/include/linux/hid.h
> > +++ b/include/linux/hid.h
> > @@ -155,6 +155,7 @@ struct hid_item {
> >  #define HID_UP_DIGITIZER     0x000d0000
> >  #define HID_UP_PID           0x000f0000
> >  #define HID_UP_BATTERY               0x00850000
> > +#define HID_UP_CAMERA                0x00900000
> >  #define HID_UP_HPVENDOR         0xff7f0000
> >  #define HID_UP_HPVENDOR2        0xff010000
> >  #define HID_UP_MSVENDOR              0xff000000
> > --
> > 2.39.0
> >
>
> Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>