On Thu, 26 May 2022, Maximilian Luz wrote:
> Similar to the Surface Go (1), the (Elantech) touchscreen/digitizer in
> the Surface Go 2 mistakenly reports the battery of the stylus. Instead
> of over the touchscreen device, battery information is provided via
> bluetooth and the touchscreen device reports an empty battery.
>
> Apply the HID_BATTERY_QUIRK_IGNORE quirk to ignore this battery and
> prevent the erroneous low battery warnings.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Maximilian Luz <luzmaximilian@xxxxxxxxx>
> ---
> drivers/hid/hid-ids.h | 1 +
> drivers/hid/hid-input.c | 2 ++
> 2 files changed, 3 insertions(+)
>
> diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
> index d9eb676abe96..9c4e92a9c646 100644
> --- a/drivers/hid/hid-ids.h
> +++ b/drivers/hid/hid-ids.h
> @@ -413,6 +413,7 @@
> #define USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN 0x2544
> #define USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN 0x2706
> #define I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN 0x261A
> +#define I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN 0x2A1C
>
> #define USB_VENDOR_ID_ELECOM 0x056e
> #define USB_DEVICE_ID_ELECOM_BM084 0x0061
> diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
> index c6b27aab9041..48c1c02c69f4 100644
> --- a/drivers/hid/hid-input.c
> +++ b/drivers/hid/hid-input.c
> @@ -381,6 +381,8 @@ static const struct hid_device_id hid_battery_quirks[] = {
> HID_BATTERY_QUIRK_IGNORE },
> { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN),
> HID_BATTERY_QUIRK_IGNORE },
> + { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN),
> + HID_BATTERY_QUIRK_IGNORE },
Applied, thanks.
--
Jiri Kosina
SUSE Labs
