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

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Message-ID: <f6d4145b-3295-4a98-9074-d4d1b7b466ae@kernel.org>
Date: Wed, 8 Oct 2025 09:06:32 -0500
From: Mario Limonciello <superm1@...nel.org>
To: Antheas Kapenekakis <lkml@...heas.dev>, 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>
Subject: Re: [PATCH v1] platform/x86/amd: pmc: Add Lenovo Legion Go 2 to pmc
 quirk list

On 10/8/25 8:50 AM, Antheas Kapenekakis wrote:
> 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>

This makes sense for BIOS in the field.
If this is fixed in the BIOS later I'd like to narrow the quirk at a 
later time.

Reviewed-by: Mario Limonciello (AMD) <superm1@...nel.org>

> ---
>   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