linux.git/drivers/hid/hid-input.c, branch v5.16

HID: Ignore battery for Elan touchscreen on Asus UX550VE

2021-12-08T17:16:07+00:00

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

HID: Ignore battery for Elan touchscreen on HP Envy X360 15-eu0xxx

2021-11-19T14:51:17+00:00

Battery status is reported for the HP Envy X360 Convertible 15-eu0xxx
even if it does not have a battery. Prevent it from always reporting the
battery as low.

Signed-off-by: Trevor Davenport 
Signed-off-by: Jiri Kosina

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

2021-11-19T14:48:22+00:00

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

HID: input: Fix parsing of HID_CP_CONSUMER_CONTROL fields

2021-11-19T14:47:38+00:00

Fix parsing of HID_CP_CONSUMER_CONTROL fields which are not in
the HID_CP_PROGRAMMABLEBUTTONS collection.

Fixes: bcfa8d14570d ("HID: input: Add support for Programmable Buttons")
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=2018096
Cc: Thomas Weißschuh 
Suggested-by: Benjamin Tissoires 
Signed-off-by: Hans de Goede 
Reviewed-By: Thomas Weißschuh 
Signed-off-by: Jiri Kosina

HID: core: add TransducerSerialNumber2

2021-09-15T14:45:37+00:00

A recent request for change to the HID spec got approved adding support
for another 4-bytes to the Transducer Serial Number. This commit adds
support for the new usage.

https://www.usb.org/sites/default/files/hutrr103-transducerserialnumbermoresignificantbits_0.pdf

Signed-off-by: Felipe Balbi 
Signed-off-by: Jiri Kosina

HID: input: do not report stylus battery state as "full"

2021-07-15T18:55:30+00:00

The power supply states of discharging, charging, full, etc, represent
state of charging, not the capacity level of the battery (for which
we have a separate property). Current HID usage tables to not allow
for expressing charging state of the batteries found in generic
styli, so we should simply assume that the battery is discharging
even if current capacity is at 100% when battery strength reporting
is done via HID interface. In fact, we were doing just that before
commit 581c4484769e.

This change helps UIs to not mis-represent fully charged batteries in
styli as being charging/topping-off.

Fixes: 581c4484769e ("HID: input: map digitizer battery usage")
Reported-by: Kenneth Albanowski 
Signed-off-by: Dmitry Torokhov 
Signed-off-by: Jiri Kosina

Merge branch 'for-5.14/core' into for-linus

2021-06-30T07:03:51+00:00

- device unbinding locking fix from Dmitry Torokhov
- support for programmable buttons (mapping to KEY_MACRO# event codes)
  from Thomas Weißschuh
- various other small fixes and code style improvements

HID: input: Add support for Programmable Buttons

2021-06-24T13:40:59+00:00

Map them to KEY_MACRO# event codes.

These buttons are defined by HID as follows:
"The user defines the function of these buttons to control software applications or GUI objects."

This matches the semantics of the KEY_MACRO# input event codes that Linux supports.

Also add support for HID "Named Array" collections.
Also add hid-debug support for KEY_MACRO#.

Signed-off-by: Thomas Weißschuh 
Signed-off-by: Jiri Kosina

HID: hid-input: add Surface Go battery quirk

2021-06-14T13:37:16+00:00

The Elantech touchscreen/digitizer in the Surface Go mistakenly reports
having a battery. This results in a low battery message every time you
try to use the pen.

This patch adds a quirk to ignore the non-existent battery and
gets rid of the false low battery messages.

Signed-off-by: Zoltan Tamas Vajda 
Signed-off-by: Jiri Kosina

HID: input: replace outdated HID numbers+comments with macros

2021-05-05T13:07:35+00:00

These were untouched since 2.3.99-pre3, and the explanatory comment for
HID_DG_TIPPRESSURE is TipPressure in other places

Signed-off-by: Ahelenia Ziemiańska 
Signed-off-by: Jiri Kosina