[PATCH v2] Input: atkbd - skip deactivate for Xiaomi Book Pro 14's internal keyboard

The internal keyboard of the Xiaomi Book Pro 14 does not work unless
atkbd skips deactivating it at the end of atkbd_probe().

Using 'i8042.dumbkbd=1' also makes the keyboard work, but then the driver
never writes to the keyboard at all, so the Caps Lock LED is lost. The
atkbd_deactivate_fixup quirk fixes both without a boot parameter.

DMI: XIAOMI Xiaomi Book Pro 14/TM2424, BIOS XMAPT4B0P0909 05/06/2026

Signed-off-by: Zhefu Zhang <redacted>
Reviewed-by: Andrew Zhou <redacted>
---
v2:
- add Andrew's Reviewed-by
- explain why i8042.dumbkbd is not an equivalent fix

Previous: https://lore.kernel.org/all/20260801101908.33838-1-a723356@gmail.com/ (local)

 drivers/input/keyboard/atkbd.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/input/keyboard/atkbd.c b/drivers/input/keyboard/atkbd.c
index 8cb4dc6fb..6c897282d 100644
--- a/drivers/input/keyboard/atkbd.c
+++ b/drivers/input/keyboard/atkbd.c

@@ -1938,6 +1938,14 @@ static const struct dmi_system_id atkbd_dmi_quirk_table[] __initconst = {
 		},
 		.callback = atkbd_deactivate_fixup,
 	},
+	{
+		/* Xiaomi Book Pro 14 (TM2424) */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "XIAOMI"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Xiaomi Book Pro 14"),
+		},
+		.callback = atkbd_deactivate_fixup,
+	},
 	{ }
 };
 

-- 
2.55.0