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| author | Hans de Goede <hdegoede@redhat.com> | 2020-12-07 17:51:29 +0100 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2020-12-07 17:52:03 +0100 |
| commit | dea5b80a043f6cd6ad341d9957a43e363366630e (patch) | |
| tree | 306dc1a169e11afc003b9cd13684e641877aca39 /tools/power | |
| parent | platform/x86: intel-hid: Add alternative method to enable switches (diff) | |
| download | linux-dea5b80a043f6cd6ad341d9957a43e363366630e.tar.xz linux-dea5b80a043f6cd6ad341d9957a43e363366630e.zip | |
platform/x86: intel-hid: Do not create SW_TABLET_MODE input-dev when a KIOX010A ACPI dev is present
Some 360 degree hinges (yoga) style 2-in-1 devices use 2 accelerometers
to allow the OS to determine the angle between the display and the base
of the device. On Windows these are read by a special HingeAngleService
process which calls an ACPI DSM (Device Specific Method) on the
ACPI KIOX010A device node for the sensor in the display, to let the
firmware know if the 2-in-1 is in tablet- or laptop-mode so that it can
disable the kbd and touchpad to avoid spurious input in tablet-mode.
The linux kxcjk1013 driver calls the DSM for this once at probe time
to ensure that the builtin kbd and touchpad work. On some devices this
causes a "spurious" 0xcd event on the intel-hid ACPI dev. In this case
there is not a functional tablet-mode switch, so we should not register
the tablet-mode switch device.
Cc: Elia Devito <eliadevito@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20201207165129.396298-1-hdegoede@redhat.com
Diffstat (limited to 'tools/power')
0 files changed, 0 insertions, 0 deletions