linux-kernel - Re: [PATCH 1/3] iio: hid-sensors: Add proximity and attention IDs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20241027113503.46113bcc@jic23-huawei>
Date: Sun, 27 Oct 2024 11:35:03 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Ricardo Ribalda <ribalda@...omium.org>
Cc: Jiri Kosina <jikos@...nel.org>, Benjamin Tissoires <bentiss@...nel.org>,
 Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>, Lars-Peter
 Clausen <lars@...afoo.de>, Harvey Yang <chenghaoyang@...gle.com>,
 linux-input@...r.kernel.org, linux-iio@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] iio: hid-sensors: Add proximity and attention IDs

On Thu, 24 Oct 2024 13:29:05 +0000
Ricardo Ribalda <ribalda@...omium.org> wrote:

> The HID Usage Table at https://usb.org/sites/default/files/hut1_5.pdf	
> 
> - 0x4b2 for Human Proximity Range

Add more here from the references the above has.
https://www.usb.org/sites/default/files/hutrr39b_0.pdf

Distance between a human and the computer. Default unit of
measure is meters;



> - 0x4bd for Human Attention Detected
> 
Human-Presence sensors detect the presence of humans in the sensor’s field-of-view using
diverse and evolving technologies. Some presence sensors are implemented with low
resolution video cameras, which can additionally track a subject’s attention (i.e. if the
user is ‘looking’ at the system with the integrated sensor).
A Human-Presence sensor, providing a Host with the user’s attention state, allows the
Host to optimize its behavior. For example, to brighten/dim the system display, based on
the user’s attention to the system (potentially prolonging battery life).

This one is a 0/1 signal if I read the schema right.  Which is also true for
the existing HUMAN_PRESENCE. Not a problem but worth mentioning in this description.
  
https://www.usb.org/sites/default/files/hutrr107-humanpresenceattention_1.pdf



> Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
> ---
>  include/linux/hid-sensor-ids.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h
> index 6730ee900ee1..8a03d9696b1c 100644
> --- a/include/linux/hid-sensor-ids.h
> +++ b/include/linux/hid-sensor-ids.h
> @@ -30,6 +30,8 @@
>  #define HID_USAGE_SENSOR_PROX                                   0x200011
>  #define HID_USAGE_SENSOR_DATA_PRESENCE                          0x2004b0
>  #define HID_USAGE_SENSOR_HUMAN_PRESENCE                         0x2004b1
> +#define HID_USAGE_SENSOR_HUMAN_PROXIMITY                        0x2004b2
> +#define HID_USAGE_SENSOR_HUMAN_ATTENTION                        0x2004bd
>  
>  /* Pressure (200031) */
>  #define HID_USAGE_SENSOR_PRESSURE                               0x200031
>