linux-stable.git/drivers/hid/hid-input.c, branch linux-5.15.y

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

2026-01-19T12:09:45+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: Add Mapping for System Microphone Mute

2023-03-10T08:39:52+00:00

[ Upstream commit 2d60f9f4f26785a00273cb81fe60eff129ebd449 ]

HUTRR110 added a new usage code for a key that is supposed to
mute/unmute microphone system-wide.

Map the new usage code(0x01 0xa9) to keycode KEY_MICMUTE.
Additionally hid-debug is adjusted to recognize this keycode as well.

Signed-off-by: Jingyuan Liang 
Reviewed-by: Dmitry Torokhov 
Signed-off-by: Jiri Kosina 
Signed-off-by: Sasha Levin

HID: add Lenovo Yoga C630 battery quirk

2022-09-05T08:30:08+00:00

commit 3a47fa7b14c7d9613909a844aba27f99d3c58634 upstream.

Similar to the Surface Go devices, the Elantech touchscreen/digitizer in
the Lenovo Yoga C630 mistakenly reports the battery of the stylus, and
always reports an empty battery.

Apply the HID_BATTERY_QUIRK_IGNORE quirk to ignore this battery and
prevent the erroneous low battery warnings.

Signed-off-by: Steev Klimaszewski 
Signed-off-by: Jiri Kosina 
Signed-off-by: Greg Kroah-Hartman

HID: hid-input: add Surface Go battery quirk

2022-08-17T12:22:47+00:00

commit db925d809011c37b246434fdce71209fc2e6c0c2 upstream.

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@vger.kernel.org
Signed-off-by: Maximilian Luz 
Signed-off-by: Jiri Kosina 
Signed-off-by: Greg Kroah-Hartman

HID: add mapping for KEY_ALL_APPLICATIONS

2022-03-08T18:12:53+00:00

commit 327b89f0acc4c20a06ed59e4d9af7f6d804dc2e2 upstream.

This patch adds a new key definition for KEY_ALL_APPLICATIONS
and aliases KEY_DASHBOARD to it.

It also maps the 0x0c/0x2a2 usage code to KEY_ALL_APPLICATIONS.

Signed-off-by: William Mahon 
Acked-by: Benjamin Tissoires 
Link: https://lore.kernel.org/r/20220303035618.1.I3a7746ad05d270161a18334ae06e3b6db1a1d339@changeid
Signed-off-by: Dmitry Torokhov 
Signed-off-by: Greg Kroah-Hartman

HID: add mapping for KEY_DICTATE

2022-03-08T18:12:53+00:00

commit bfa26ba343c727e055223be04e08f2ebdd43c293 upstream.

Numerous keyboards are adding dictate keys which allows for text
messages to be dictated 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 
Acked-by: Benjamin Tissoires 
Link: https://lore.kernel.org/r/20220303021501.1.I5dbf50eb1a7a6734ee727bda4a8573358c6d3ec0@changeid
Signed-off-by: Dmitry Torokhov 
Signed-off-by: Greg Kroah-Hartman

HID: quirks: Allow inverting the absolute X/Y values

2022-01-27T10:04:41+00:00

[ Upstream commit fd8d135b2c5e88662f2729e034913f183455a667 ]

Add a HID_QUIRK_X_INVERT/HID_QUIRK_Y_INVERT quirk that can be used
to invert the X/Y values.

Signed-off-by: Alistair Francis 
[bentiss: silence checkpatch warning]
Signed-off-by: Benjamin Tissoires 
Link: https://lore.kernel.org/r/20211208124045.61815-2-alistair@alistair23.me
Signed-off-by: Sasha Levin

HID: Ignore battery for Elan touchscreen on HP Envy X360 15t-dr100

2022-01-27T10:02:46+00:00

commit f3193ea1b6779023334faa72b214ece457e02656 upstream.

Battery status on Elan tablet driver is reported for the HP ENVY x360
15t-dr100. There is no separate battery for the Elan controller resulting in a
battery level report of 0% or 1% depending on whether a stylus has interacted
with the screen. These low battery level reports causes a variety of bad
behavior in desktop environments. This patch adds the appropriate quirk to
indicate that the batery status is unused for this target.

Cc: stable@vger.kernel.org
Signed-off-by: Karl Kurbjun 
Signed-off-by: Jiri Kosina 
Signed-off-by: Greg Kroah-Hartman

HID: Ignore battery for Elan touchscreen on Asus UX550VE

2021-12-14T09:57:06+00:00

commit 14902f8961dca9c66bf190f7b1583767c97a4197 upstream.

Battery status is reported for the Asus UX550VE touchscreen even though
it does not have a battery. Prevent it from always reporting the
battery as low.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1897823
Signed-off-by: Hans de Goede 
Signed-off-by: Jiri Kosina 
Signed-off-by: Greg Kroah-Hartman

HID: input: set usage type to key on keycode remap

2021-12-01T08:04:48+00:00

[ Upstream commit 3e6a950d98366f5e716904e9a7e8ffc7ed638bd6 ]

When a scancode is manually remapped that previously was not handled as
key, then the old usage type was incorrectly reused.

This caused issues on a "04b3:301b IBM Corp. SK-8815 Keyboard" which has
marked some of its keys with an invalid HID usage.  These invalid usage
keys are being ignored since support for USB programmable buttons was
added.

The scancodes are however remapped explicitly by the systemd hwdb to the
keycodes that are printed on the physical buttons.  During this mapping
step the existing usage is retrieved which will be found with a default
type of 0 (EV_SYN) instead of EV_KEY.

The events with the correct code but EV_SYN type are not forwarded to
userspace.

This also leads to a kernel oops when trying to print the report descriptor
via debugfs.  hid_resolv_event() tries to resolve a EV_SYN event with an
EV_KEY code which leads to an out-of-bounds access in the EV_SYN names
array.

Fixes: bcfa8d1457 ("HID: input: Add support for Programmable Buttons")
Fixes: f5854fad39 ("Input: hid-input - allow mapping unknown usages")
Reported-by: Brent Roman 
Tested-by: Brent Roman 
Signed-off-by: Thomas Weißschuh 
Reviewed-by: Dmitry Torokhov 
Signed-off-by: Jiri Kosina 
Signed-off-by: Sasha Levin