platform/x86: lenovo/ymc: Only match lower byte in WMI lid switch query response

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On newer Lenovo Yoga devices like the "Yoga 9 2-in-1 14IPH11 - Type 83SE",
the hinge switch WMI query returns extra data in the upper bits
(e.g. 0x50001 laptop mode, 0x50002 tablet mode, ect.).

The driver previously checked for exact matches (0x01 laptop, 0x02 tablet,
ect.) causing newer switches to not work.

Mask the WMI query result to only match the lower byte and ignore upper
bits.

Signed-off-by: Julian Haarmann <julian.haarmann@student.kit.edu>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260614203235.235724-1-julian.haarmann@student.kit.edu
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

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Julian Haarmann 2026-06-14 22:30:26 +02:00 • committed by Ilpo Järvinen

parent 83c80495e4

commit bbc497b523

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drivers/platform/x86/lenovo/ymc.c

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