linux-kernel - Re: [PATCH] platform/x86: thinkpad_acpi: Add missing T14s Gen1 type to s2idle quirk list

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Message-ID: <12a26960-1cc8-80df-e284-d0fa4768f558@redhat.com>
Date:   Mon, 3 Apr 2023 12:02:53 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Benjamin Asbach <asbachb.kernel@...l.it>
Cc:     Mario Limonciello <mario.limonciello@....com>,
        Mark Pearson <markpearson@...vo.com>,
        Henrique de Moraes Holschuh <hmh@....eng.br>,
        Mark Gross <markgross@...nel.org>,
        ibm-acpi-devel@...ts.sourceforge.net,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] platform/x86: thinkpad_acpi: Add missing T14s Gen1 type
 to s2idle quirk list

Hi,

On 4/1/23 01:24, Benjamin Asbach wrote:
>> Lenovo laptops that contain NVME SSDs across a variety of generations have
>> trouble resuming from suspend to idle when the IOMMU translation layer is
>> active for the NVME storage device.
>>
>> This generally manifests as a large resume delay or page faults. These
>> delays and page faults occur as a result of a Lenovo BIOS specific SMI
>> that runs during the D3->D0 transition on NVME devices.
> 
> Link: https://lore.kernel.org/all/20220503183420.348-1-mario.limonciello@amd.com/
> 
> As Lenovo distributes T14s Gen1 laptops with different product names
> a missing one is added by this patch.
> 
> Note: Based on lenovo support page there might be some more variants which
> are not represented in s2idle quirk list.

Can you provide some more in info on this? Then Mark can maybe check
if we need to add more models ?

Mark, generally speaking it may help to do a DMI_EXACT_MATCH on
DMI_PRODUCT_VERSION with ThinkPads ? That contains the human
readable model string instead of things like "20UJ", and I guess
that we want to e.g. apply the s2idle quirk to all "T14s Gen1 AMD"
ThinkPads.

> 
> Signed-off-by: Benjamin Asbach <asbachb.kernel@...l.it>
> Tested-by: Benjamin Asbach <asbachb.kernel@...l.it>

Thank you for your patch, I've applied this patch to my fixes
branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=fixes

Note it will show up in my fixes branch once I've pushed my
local branch there, which might take a while.

I will include this patch in my next fixes pull-req to Linus
for the current kernel development cycle.

Regards,

Hans





> 
> Link: https://bbs.archlinux.org/viewtopic.php?pid=2084655#p2084655
> ---
>  drivers/platform/x86/thinkpad_acpi.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
> index 32c10457399e..57428d7a392d 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -4478,6 +4478,15 @@ static const struct dmi_system_id fwbug_list[] __initconst = {
>  			DMI_MATCH(DMI_PRODUCT_NAME, "20UH"),
>  		}
>  	},
> +	{
> +		.ident = "T14s Gen1 AMD",
> +		.driver_data = &quirk_s2idle_bug,
> +		.matches = {
> +			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
> +			DMI_MATCH(DMI_PRODUCT_NAME, "20UJ"),
> +		}
> +	},
> +
>  	{
>  		.ident = "P14s Gen1 AMD",
>  		.driver_data = &quirk_s2idle_bug,