linux-kernel - [PATCH v1] platform/x86/amd: pmc: Add Lenovo Legion Go 2 to pmc quirk list

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Message-ID: <20251008135057.731928-1-lkml@antheas.dev>
Date: Wed,  8 Oct 2025 15:50:57 +0200
From: Antheas Kapenekakis <lkml@...heas.dev>
To: Mario Limonciello <mario.limonciello@....com>,
	Shyam-sundar.S-k@....com,
	hansg@...nel.org,
	ilpo.jarvinen@...ux.intel.com
Cc: platform-driver-x86@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Mark Pearson <mpearson-lenovo@...ebb.ca>,
	Antheas Kapenekakis <lkml@...heas.dev>
Subject: [PATCH v1] platform/x86/amd: pmc: Add Lenovo Legion Go 2 to pmc quirk
 list

The Lenovo Legion Go 2 takes a long time to resume from suspend.
This is due to it having an nvme resume handler that interferes
with IOMMU mappings. It is a common issue with older Lenovo
laptops. Adding it to that quirk list fixes this issue.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4618
Suggested-by: Mario Limonciello <mario.limonciello@....com>
Signed-off-by: Antheas Kapenekakis <lkml@...heas.dev>
---
 drivers/platform/x86/amd/pmc/pmc-quirks.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/platform/x86/amd/pmc/pmc-quirks.c b/drivers/platform/x86/amd/pmc/pmc-quirks.c
index d63aaad7ef59..0fadcf5f288a 100644
--- a/drivers/platform/x86/amd/pmc/pmc-quirks.c
+++ b/drivers/platform/x86/amd/pmc/pmc-quirks.c
@@ -204,6 +204,23 @@ static const struct dmi_system_id fwbug_list[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "82ND"),
 		}
 	},
+	/* https://gitlab.freedesktop.org/drm/amd/-/issues/4618 */
+	{
+		.ident = "Lenovo Legion Go 2",
+		.driver_data = &quirk_s2idle_bug,
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "83N0"),
+		}
+	},
+	{
+		.ident = "Lenovo Legion Go 2",
+		.driver_data = &quirk_s2idle_bug,
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "83N1"),
+		}
+	},
 	/* https://gitlab.freedesktop.org/drm/amd/-/issues/2684 */
 	{
 		.ident = "HP Laptop 15s-eq2xxx",

base-commit: a8cdf51cda30f7461a98af821e8a28c5cb5f8878
-- 
2.51.0