kernel/linux.git/drivers/hid/hid-input.c, branch v6.1.168

HID: input: map HID_GD_Z to ABS_DISTANCE for stylus/pen

2026-01-11T14:18:46+00:00

commit 7953794f741e94d30df9dafaaa4c031c85b891d6 upstream. HID_GD_Z is mapped to ABS_Z for stylus and pen in hid-input.c. But HID_GD_Z should be used to report ABS_DISTANCE for stylus and pen as described at: Documentation/input/event-codes.rst#n226 * ABS_DISTANCE: - Used to describe the distance of a tool from an interaction surface. This event should only be emitted while the tool is hovering, meaning in close proximity of the device and while the value of the BTN_TOUCH code is 0. If the input device may be used freely in three dimensions, consider ABS_Z instead. - BTN_TOOL_ should be set to 1 when the tool comes into detectable proximity and set to 0 when the tool leaves detectable proximity. BTN_TOOL_ signals the type of tool that is currently detected by the hardware and is otherwise independent of ABS_DISTANCE and/or BTN_TOUCH. This patch makes the correct mapping. The ABS_DISTANCE is currently not mapped by any HID usage in hid-generic driver. Signed-off-by: Ping Cheng Cc: stable@kernel.org Signed-off-by: Jiri Kosina Signed-off-by: Greg Kroah-Hartman

HID: hid-input: only ignore 0 battery events for digitizers

2025-10-29T13:04:35+00:00

[ Upstream commit 0187c08058da3e7f11b356ac27e0c427d36f33f2 ] Commit 581c4484769e ("HID: input: map digitizer battery usage") added handling of battery events for digitizers (typically for batteries presented in stylii). Digitizers typically report correct battery levels only when stylus is actively touching the surface, and in other cases they may report battery level of 0. To avoid confusing consumers of the battery information the code was added to filer out reports with 0 battery levels. However there exist other kinds of devices that may legitimately report 0 battery levels. Fix this by filtering out 0-level reports only for digitizer usages, and continue reporting them for other kinds of devices (Smart Batteries, etc). Reported-by: 卢国宏 Fixes: 581c4484769e ("HID: input: map digitizer battery usage") Signed-off-by: Dmitry Torokhov Signed-off-by: Jiri Kosina Signed-off-by: Sasha Levin

HID: input: report battery status changes immediately

2025-09-04T13:26:26+00:00

[ Upstream commit e94536e1d1818b0989aa19b443b7089f50133c35 ] Previously, the battery status (charging/discharging) was not reported immediately to user-space. For most input devices, this wasn't problematic because changing their battery status requires connecting them to a different bus. For example, a gamepad would report a discharging status while connected via Bluetooth and a charging status while connected via USB. However, certain devices are not connected or disconnected when their battery status changes. For example, a phone battery changes its status without connecting or disconnecting it. In these cases, the battery status was not reported immediately to user space. Report battery status changes immediately to user space to support these kinds of devices. Fixes: a608dc1c0639 ("HID: input: map battery system charging") Reported-by: 卢国宏 Closes: https://lore.kernel.org/linux-input/aI49Im0sGb6fpgc8@fedora/T/ Tested-by: 卢国宏 Signed-off-by: José Expósito Signed-off-by: Jiri Kosina Signed-off-by: Sasha Levin

HID: input: rename hidinput_set_battery_charge_status()

2025-09-04T13:26:26+00:00

[ Upstream commit a82231b2a8712d0218fc286a9b0da328d419a3f4 ] In preparation for a patch fixing a bug affecting hidinput_set_battery_charge_status(), rename the function to hidinput_update_battery_charge_status() and move it up so it can be used by hidinput_update_battery(). Refactor, no functional changes. Tested-by: 卢国宏 Signed-off-by: José Expósito Signed-off-by: Jiri Kosina Stable-dep-of: e94536e1d181 ("HID: input: report battery status changes immediately") Signed-off-by: Sasha Levin

HID: Ignore battery for ELAN touchscreens 2F2C and 4116

2024-07-25T07:49:11+00:00

[ Upstream commit a3a5a37efba11b7cf1a86abe7bccfbcdb521764e ] At least ASUS Zenbook 14 (2023) and ASUS Zenbook 14 Pro (2023) are affected. The touchscreen reports a battery status of 0% and jumps to 1% when a stylus is used. The device ID was added and the battery ignore quirk was enabled for it. [jkosina@suse.com: reformatted changelog a bit] Signed-off-by: Louis Dalibard Signed-off-by: Jiri Kosina Signed-off-by: Sasha Levin

HID: input: map battery system charging

2023-10-25T10:03:14+00:00

commit a608dc1c06397dc50ab773498433432fb5938f92 upstream. HID descriptors with Battery System (0x85) Charging (0x44) usage are ignored and POWER_SUPPLY_STATUS_DISCHARGING is always reported to user space, even when the device is charging. Map this usage and when it is reported set the right charging status. In addition, add KUnit tests to make sure that the charging status is correctly set and reported. They can be run with the usual command: $ ./tools/testing/kunit/kunit.py run --kunitconfig=drivers/hid Signed-off-by: José Expósito Signed-off-by: Jiri Kosina Signed-off-by: Greg Kroah-Hartman

HID: input: Support devices sending Eraser without Invert

2023-09-13T07:42:55+00:00

[ Upstream commit 276e14e6c3993317257e1787e93b7166fbc30905 ] Some digitizers (notably XP-Pen Artist 24) do not report the Invert usage when erasing. This causes the device to be permanently stuck with the BTN_TOOL_RUBBER tool after sending Eraser, as Invert is the only usage that can release the tool. In this state, Touch and Inrange are no longer reported to userspace, rendering the pen unusable. Prior to commit 87562fcd1342 ("HID: input: remove the need for HID_QUIRK_INVERT"), BTN_TOOL_RUBBER was never set and Eraser events were simply translated into BTN_TOUCH without causing an inconsistent state. Introduce HID_QUIRK_NOINVERT for such digitizers and detect them during hidinput_configure_usage(). This quirk causes the tool to be released as soon as Eraser is reported as not set. Set BTN_TOOL_RUBBER in input->keybit when mapping Eraser. Fixes: 87562fcd1342 ("HID: input: remove the need for HID_QUIRK_INVERT") Co-developed-by: Nils Fuhler Signed-off-by: Nils Fuhler Signed-off-by: Illia Ostapyshyn Signed-off-by: Jiri Kosina Signed-off-by: Sasha Levin

HID: Ignore battery for ELAN touchscreen on ROG Flow X13 GV301RA

2023-05-24T16:32:41+00:00

[ Upstream commit 35903009dbde804a1565dc89e431c0f15179f054 ] Ignore the reported battery level of the built-in touchscreen to suppress battery warnings when a stylus is used. The device ID was added and the battery ignore quirk was enabled. Signed-off-by: weiliang1503 Link: https://lore.kernel.org/r/20230330115638.16146-1-weiliang1503@gmail.com Signed-off-by: Benjamin Tissoires Signed-off-by: Sasha Levin

HID: uclogic: Add support for XP-PEN Deco Pro MW

2023-03-10T08:33:57+00:00

[ Upstream commit 9266a88156d1fbb8e50d6eeff7bac44ad4eaecc2 ] The XP-PEN Deco Pro MW is a UGEE v2 device with a frame with 8 buttons, a bitmap dial and a mouse. Its pen has 2 buttons, supports tilt and pressure. It can be connected using a USB cable or, to use it in wireless mode, using a USB Bluetooth dongle. When it is connected in wireless mode the device battery is used to power it. All the pieces to support it are already in place. Add its ID and quirks in order to support the device. Link: https://github.com/DIGImend/digimend-kernel-drivers/issues/622 Tested-by: Andreas Grosse Signed-off-by: José Expósito Signed-off-by: Jiri Kosina Signed-off-by: Sasha Levin

HID: uclogic: Add support for XP-PEN Deco Pro SW

2023-03-10T08:33:57+00:00

[ Upstream commit 7744ca571af55b794595cff2da9d51a26904998f ] The XP-PEN Deco Pro SW is a UGEE v2 device with a frame with 8 buttons, a bitmap dial and a mouse; however, the UCLOGIC_MOUSE_FRAME_QUIRK is required because it reports an incorrect frame type. Its pen has 2 buttons, supports tilt and pressure. It can be connected using a USB cable or, to use it in wireless mode, using a USB Bluetooth dongle. When it is connected in wireless mode the device battery is used to power it. All the pieces to support it are already in place. Add its ID and quirks in order to support the device. Signed-off-by: José Expósito Signed-off-by: Jiri Kosina Signed-off-by: Sasha Levin