linux-kernel - Re: [PATCH v2] HID: Add mapping for KEY

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Date:   Thu, 17 Feb 2022 22:52:40 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     William Mahon <wmahon@...omium.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        William Mahon <wmahon@...gle.com>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Jiri Kosina <jikos@...nel.org>, linux-input@...r.kernel.org
Subject: Re: [PATCH v2] HID: Add mapping for KEY_DICTATE

On Fri, Feb 18, 2022 at 01:51:45AM +0000, William Mahon wrote:
> Numerous keyboards are adding dictate keys which allows for text
> messages to be dicated by a microphone.
> 
> This patch adds a new key definition KEY_DICTATE and maps 0x0c/0x0d8
> usage code to this new keycode. Additionally hid-debug is adjusted to
> recognize this new usage code as well.
> 
> Signed-off-by: William Mahon <wmahon@...gle.com>
> ---
> 
>  drivers/hid/hid-debug.c                | 1 +
>  drivers/hid/hid-input.c                | 1 +
>  include/uapi/linux/input-event-codes.h | 2 ++
>  3 files changed, 4 insertions(+)
> 
> diff --git a/drivers/hid/hid-debug.c b/drivers/hid/hid-debug.c
> index 26c31d759914..8aa68416b1d7 100644
> --- a/drivers/hid/hid-debug.c
> +++ b/drivers/hid/hid-debug.c
> @@ -969,6 +969,7 @@ static const char *keys[KEY_MAX + 1] = {
>  	[KEY_ASSISTANT] = "Assistant",
>  	[KEY_KBD_LAYOUT_NEXT] = "KbdLayoutNext",
>  	[KEY_EMOJI_PICKER] = "EmojiPicker",
> +	[KEY_DICTATE] = "Dictate",
>  	[KEY_BRIGHTNESS_MIN] = "BrightnessMin",
>  	[KEY_BRIGHTNESS_MAX] = "BrightnessMax",
>  	[KEY_BRIGHTNESS_AUTO] = "BrightnessAuto",
> diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
> index 112901d2d8d2..ce2b75a67cb8 100644
> --- a/drivers/hid/hid-input.c
> +++ b/drivers/hid/hid-input.c
> @@ -992,6 +992,7 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
>  		case 0x0cd: map_key_clear(KEY_PLAYPAUSE);	break;
>  		case 0x0cf: map_key_clear(KEY_VOICECOMMAND);	break;
>  
> +		case 0x0d8: map_key_clear(KEY_DICTATE);		break;
>  		case 0x0d9: map_key_clear(KEY_EMOJI_PICKER);	break;
>  
>  		case 0x0e0: map_abs_clear(ABS_VOLUME);		break;
> diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h
> index 225ec87d4f22..9aa994cbcd60 100644
> --- a/include/uapi/linux/input-event-codes.h
> +++ b/include/uapi/linux/input-event-codes.h
> @@ -660,6 +660,8 @@
>  /* Select an area of screen to be copied */
>  #define KEY_SELECTIVE_SCREENSHOT	0x27a
>  
> +#define KEY_DICTATE			0x27b

Please use 0x24a keycode, move after KEY_EMOJI_PICKER definition, and
add a comment:

/* Start or Stop Voice Dictation Session (HUTRR99) */

Thanks.

-- 
Dmitry