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

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Date:   Thu, 16 Feb 2023 17:26:16 +0800
From:   qi feng <fengqi706@...il.com>
To:     jikos@...nel.org
Cc:     benjamin.tissoires@...hat.com, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org, fengqi <fengqi@...omi.com>,
        gregkh@...uxfoundation.org
Subject: Re: [PATCH v4] HID: add KEY_CAMERA_FOCUS event in HID

loop more

Qi Feng <fengqi706@...il.com> 于2023年2月16日周四 16:48写道：
>
> 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
>