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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 |
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