linux.git/drivers/hid/hid-input.c, branch v6.17

HID: input: report battery status changes immediately

2025-08-20T18:03:39+00:00

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

HID: input: rename hidinput_set_battery_charge_status()

2025-08-20T18:03:39+00:00

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

HID: input: lower message severity of 'No inputs registered, leaving' to debug

2025-06-10T19:47:48+00:00

Plugging in a "Blue snowball" microphone always shows the
error 'No inputs registered, leaving', but the device functions as
intended.

When a HID device is started using the function hid_hw_start() and
the argument HID_CONNECT_DEFAULT it will try all various hid connect
requests. Not all devices will create an input device and so the
message is needlessly noisy.  Decrease it to debug instead.

[jkosina@suse.com: edit shortlog]
Signed-off-by: Mario Limonciello 
Signed-off-by: Jiri Kosina

HID: fix generic desktop D-Pad controls

2025-01-09T09:06:14+00:00

The addition of the "System Do Not Disturb" event code caused the Generic
Desktop D-Pad configuration to be skipped. This commit allows both to be
configured without conflicting with each other.

Fixes: 22d6d060ac77 ("input: Add support for "Do Not Disturb"")
Signed-off-by: Terry Tritton 
Reviewed-by: Aseda Aboagye 
Reviewed-by: Carlos Llamas 
Signed-off-by: Jiri Kosina

HID: Ignore battery for all ELAN I2C-HID devices

2024-08-06T06:42:53+00:00

Before this change there were 16 vid:pid based quirks to ignore the battery
reported by Elan I2C-HID touchscreens on various Asus and HP laptops.

And a report has been received that the 04F3:2A00 I2C touchscreen on
the HP ProBook x360 11 G5 EE/86CF also reports a non present battery.

Since I2C-HID devices are always builtin to laptops they are not battery
owered so it should be safe to just ignore the battery on all Elan I2C-HID
devices, rather then adding a 17th quirk for the 04F3:2A00 touchscreen.

As reported in the changelog of commit a3a5a37efba1 ("HID: Ignore battery
for ELAN touchscreens 2F2C and 4116"), which added 2 new Elan touchscreen
quirks about a month ago, the HID reported battery seems to be related
to a stylus being used. But even when a stylus is in use it does not
properly report the charge of the stylus battery, instead the reported
battery charge jumps from 0% to 1%. So it is best to just ignore the
HID battery.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=2302776
Cc: Louis Dalibard 
Signed-off-by: Hans de Goede 
Signed-off-by: Jiri Kosina

HID: Ignore battery for ELAN touchscreens 2F2C and 4116

2024-06-07T15:02:56+00:00

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

input: Add support for "Do Not Disturb"

2024-06-07T09:08:07+00:00

HUTRR94 added support for a new usage titled "System Do Not Disturb"
which toggles a system-wide Do Not Disturb setting. This commit simply
adds a new event code for the usage.

Signed-off-by: Aseda Aboagye 
Acked-by: Dmitry Torokhov 
Link: https://lore.kernel.org/r/Zl-gUHE70s7wCAoB@google.com
Signed-off-by: Benjamin Tissoires

input: Add event code for accessibility key

2024-06-07T09:08:07+00:00

HUTRR116 added support for a new usage titled "System Accessibility
Binding" which toggles a system-wide bound accessibility UI or command.
This commit simply adds a new event code for the usage.

Signed-off-by: Aseda Aboagye 
Acked-by: Dmitry Torokhov 
Link: https://lore.kernel.org/r/Zl-e97O9nvudco5z@google.com
Signed-off-by: Benjamin Tissoires

HID: input: avoid polling stylus battery on Chromebook Pompom

2024-02-27T14:18:01+00:00

Internal touchscreen on Trogdor Pompom (AKA Dynabook Chromebook C1)
supports USI stylus. Unfortunately the HID descriptor for the stylus
interface does not contain "Stylus" physical collection, which makes
the kernel to try and pull battery information, resulting in errors.

Apply HID_BATTERY_QUIRK_AVOID_QUERY to the device.

Signed-off-by: Dmitry Torokhov 
Signed-off-by: Jiri Kosina

HID: Add quirk to ignore the touchscreen battery on HP ENVY 15-eu0556ng

2023-10-05T10:50:35+00:00

Like various other devices using similar hardware, this model reports a
perpetually empty battery (0-1%).

Join the others and apply HID_BATTERY_QUIRK_IGNORE.

Signed-off-by: Fabian Vogt 
Signed-off-by: Jiri Kosina