HID: multitouch: add quirks for Lenovo Yoga Book 9i

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[ Upstream commit 822bc5b374 ]

The Lenovo Yoga Book 9i is a dual-screen laptop, with a single composite
USB device providing both touch and tablet interfaces for both screens.
All inputs report through a single device, differentiated solely by report
numbers. As there is no way for udev to differentiate the inputs based on
USB vendor/product ID or interface numbers, custom naming is required to
match against for downstream configuration. A firmware bug also results
in an erroneous InRange message report being received after the stylus
leaves proximity, blocking later touch events. Add required quirks for
Gen 8 to Gen 10 models, including a new quirk providing for custom input
device naming and dropping erroneous InRange reports.

Signed-off-by: Brian Howard <blhoward2@gmail.com>
Tested-by: Brian Howard <blhoward2@gmail.com>
Tested-by: Kris Fredrick <linux.baguette800@slmail.me>
Reported-by: Andrei Shumailov <gentoo1993@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220386
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Brian Howard 2025-12-02 21:35:47 -05:00 • committed by Sasha Levin

parent 5ed818e956

commit 409d19050c

2 changed files with 73 additions and 0 deletions

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1

drivers/hid/hid-ids.h

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72

drivers/hid/hid-multitouch.c

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