linux-kernel - [PATCH] platform/x86: intel-hid: Enable 5-button array on ThinkPad X1 Fold 16 Gen 1

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Message-ID: <20260210082448.30335-1-diamondback@cohunt.app>
Date: Tue, 10 Feb 2026 09:24:48 +0100
From: Leif Skunberg <diamondback@...unt.app>
To: hdegoede@...hat.com
Cc: platform-driver-x86@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Leif Skunberg <diamondback@...unt.app>
Subject: [PATCH] platform/x86: intel-hid: Enable 5-button array on ThinkPad X1 Fold 16 Gen 1

The Lenovo ThinkPad X1 Fold 16 Gen 1 has physical volume up/down
buttons that are handled through the intel-hid 5-button array
interface. The firmware does not advertise 5-button array support via
HEBC, so the driver relies on a DMI allowlist to enable it.

Add the ThinkPad X1 Fold 16 Gen 1 to the button_array_table so the
volume buttons work out of the box.

Signed-off-by: Leif Skunberg <diamondback@...unt.app>
---
 drivers/platform/x86/intel/hid.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/platform/x86/intel/hid.c b/drivers/platform/x86/intel/hid.c
index 560cc0631..6f059740f 100644
--- a/drivers/platform/x86/intel/hid.c
+++ b/drivers/platform/x86/intel/hid.c
@@ -135,6 +135,13 @@ static const struct dmi_system_id button_array_table[] = {
 			DMI_MATCH(DMI_PRODUCT_FAMILY, "ThinkPad X1 Tablet Gen 2"),
 		},
 	},
+	{
+		.ident = "Lenovo ThinkPad X1 Fold 16 Gen 1",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_FAMILY, "ThinkPad X1 Fold 16 Gen 1"),
+		},
+	},
 	{
 		.ident = "Microsoft Surface Go 3",
 		.matches = {
-- 
2.53.0