linux-kernel - Re: [PATCH] HID: quirks: Add quirk for Chicony Electronics HP 5MP Camera

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Message-ID: <s3ns5747-ps0n-1no0-1qqq-prq39onr7o79@xreary.bet>
Date: Thu, 24 Apr 2025 11:29:33 +0200 (CEST)
From: Jiri Kosina <jikos@...nel.org>
To: "Chia-Lin Kao (AceLan)" <acelan.kao@...onical.com>
cc: Benjamin Tissoires <bentiss@...nel.org>, linux-input@...r.kernel.org, 
    linux-kernel@...r.kernel.org
Subject: Re: [PATCH] HID: quirks: Add quirk for Chicony Electronics HP 5MP
 Camera

On Wed, 12 Mar 2025, Chia-Lin Kao (AceLan) wrote:

> The Chicony Electronics HP 5MP Camera (USB ID 04F2:B82C) reports a HID
> sensor interface that is not actually implemented. Attempting to access
> this non-functional sensor via iio_info causes system hangs as runtime PM
> tries to wake up an unresponsive sensor.
> 
> Add this device to the HID ignore list since the sensor interface is
> non-functional by design and should not be exposed to userspace.
> 
> Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao@...onical.com>
> ---
>  drivers/hid/hid-ids.h    | 1 +
>  drivers/hid/hid-quirks.c | 1 +
>  2 files changed, 2 insertions(+)
> 
> diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
> index 7e400624908e..5fdea9116a3e 100644
> --- a/drivers/hid/hid-ids.h
> +++ b/drivers/hid/hid-ids.h
> @@ -297,6 +297,7 @@
>  #define USB_DEVICE_ID_ASUS_AK1D		0x1125
>  #define USB_DEVICE_ID_CHICONY_TOSHIBA_WT10A	0x1408
>  #define USB_DEVICE_ID_CHICONY_ACER_SWITCH12	0x1421
> +#define USB_DEVICE_ID_CHICONY_HP_5MB_CAMERA	0xb82c
>  
>  #define USB_VENDOR_ID_CHUNGHWAT		0x2247
>  #define USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH	0x0001
> diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
> index 5d7a418ccdbe..452fac15550b 100644
> --- a/drivers/hid/hid-quirks.c
> +++ b/drivers/hid/hid-quirks.c
> @@ -370,6 +370,7 @@ static const struct hid_device_id hid_have_special_driver[] = {
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) },
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_ASUS_AK1D) },
>  	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) },
> +	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_HP_5MB_CAMERA) },

Given the changelog, did you mean to add this device to hid_ignore_list[] 
instead of hid_have_special_driver[]?

Thanks,

-- 
Jiri Kosina
SUSE Labs