Re: [PATCH v2 2/5] platform/x86/amd/pmc: Delay suspend for some Lenovo Laptops

[Ilpo Järvinen]

On Sat, 9 May 2026, Daniel Gibson wrote:

> Some IdeaPad Slim 3 devices and similar with AMD CPUs have a
> nonfunctional keyboard and lid switch after s2idle.
> It helps to delay suspend by 2.5 seconds so the EC has some time
> to do whatever it needs to get done before suspend - unfortunately
> at least on my 16ABR8 waking it with a timer (wakealarm) still
> triggers the issue, but at least normal resume via keypress or
> lid works fine.
> 
> This issue has been reported for many different devices, this patch
> has been tested with the Zen3-based IdeaPad Slim 3 16ABR8 (82XR)
> and the Zen3+-based IdeaPad Slim 3 14ARP10 (83K6).
> 
> Reported-by: Sindre Henriksen <sindrehenriksen93@xxxxxxxxx>
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221383

Cc: stable@xxxxxxxxxxxxxxx

would be warranted for this.

> Tested-by: Sindre Henriksen <sindrehenriksen93@xxxxxxxxx>
> Suggested-by: Mario Limonciello (AMD) <superm1@xxxxxxxxxx>
> Reviewed-by: Mario Limonciello (AMD) <superm1@xxxxxxxxxx>
> Signed-off-by: Daniel Gibson <daniel@xxxxxxxxx>
> ---
>  drivers/platform/x86/amd/pmc/pmc-quirks.c | 31 +++++++++++++++++++++++
>  drivers/platform/x86/amd/pmc/pmc.c        | 24 +++++++++++++++++-
>  drivers/platform/x86/amd/pmc/pmc.h        |  1 +
>  3 files changed, 55 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/platform/x86/amd/pmc/pmc-quirks.c b/drivers/platform/x86/amd/pmc/pmc-quirks.c
> index 24506e342943..842a8f442fb5 100644
> --- a/drivers/platform/x86/amd/pmc/pmc-quirks.c
> +++ b/drivers/platform/x86/amd/pmc/pmc-quirks.c
> @@ -18,6 +18,7 @@
>  struct quirk_entry {
>  	u32 s2idle_bug_mmio;
>  	bool spurious_8042;
> +	bool need_suspend_delay;
>  };
>  
>  static struct quirk_entry quirk_s2idle_bug = {
> @@ -33,6 +34,10 @@ static struct quirk_entry quirk_s2idle_spurious_8042 = {
>  	.spurious_8042 = true,
>  };
>  
> +static struct quirk_entry quirk_s2idle_need_suspend_delay = {
> +	.need_suspend_delay = true,
> +};
> +
>  static const struct dmi_system_id fwbug_list[] = {
>  	{
>  		.ident = "L14 Gen2 AMD",
> @@ -203,6 +208,27 @@ static const struct dmi_system_id fwbug_list[] = {
>  			DMI_MATCH(DMI_PRODUCT_NAME, "82XQ"),
>  		}
>  	},
> +	/* https://bugzilla.kernel.org/show_bug.cgi?id=221383 */
> +	{
> +		.ident = "Zen3-based IdeaPad Slim and similar",
> +		.driver_data = &quirk_s2idle_need_suspend_delay,
> +		.matches = {
> +			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
> +			/*
> +			 * Note: there are also some Zen2-based 82X* devices that
> +			 * need different quirks, they're already handled above
> +			 */
> +			DMI_MATCH(DMI_PRODUCT_NAME, "82X"),
> +		}
> +	},
> +	{
> +		.ident = "Zen3+-based IdeaPad Slim and similar",
> +		.driver_data = &quirk_s2idle_need_suspend_delay,
> +		.matches = {
> +			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
> +			DMI_MATCH(DMI_PRODUCT_NAME, "83K"),
> +		}
> +	},
>  	/* https://bugzilla.kernel.org/show_bug.cgi?id=221273 */
>  	{
>  		.ident = "Thinkpad L14 Gen3",
> @@ -356,6 +382,11 @@ void amd_pmc_process_restore_quirks(struct amd_pmc_dev *dev)
>  		amd_pmc_skip_nvme_smi_handler(dev->quirks->s2idle_bug_mmio);
>  }
>  
> +bool amd_pmc_quirk_need_suspend_delay(struct amd_pmc_dev *dev)
> +{
> +	return dev->quirks && dev->quirks->need_suspend_delay;
> +}
> +
>  void amd_pmc_quirks_init(struct amd_pmc_dev *dev)
>  {
>  	const struct dmi_system_id *dmi_id;
> diff --git a/drivers/platform/x86/amd/pmc/pmc.c b/drivers/platform/x86/amd/pmc/pmc.c
> index 2b9e5730170a..6bafd8661d68 100644
> --- a/drivers/platform/x86/amd/pmc/pmc.c
> +++ b/drivers/platform/x86/amd/pmc/pmc.c
> @@ -611,6 +611,27 @@ static bool amd_pmc_intermediate_wakeup_need_delay(struct amd_pmc_dev *pdev)
>  	return get_metrics_table(pdev, &table) == 0 && table.s0i3_last_entry_status;
>  }
>  
> +static bool amd_pmc_want_suspend_delay(struct amd_pmc_dev *pdev)
> +{
> +	/*
> +	 * Some Lenovo Laptops (like different IdeaPad 3 Slims) need some
> +	 * me-time before sleeping or they get uncooperative after waking
> +	 * up and don't send events for keyboard and lid switch anymore.
> +	 *
> +	 * Unfortunately this doesn't entirely fix the problem: It can still
> +	 * happen when resuming with a timer (wakealarm), but at least the
> +	 * more common usecases (wakeup by opening lid or pressing a key)
> +	 * work fine with this workaround.
> +	 *
> +	 * See https://bugzilla.kernel.org/show_bug.cgi?id=221383
> +	 */
> +	if (!disable_workarounds && amd_pmc_quirk_need_suspend_delay(pdev)) {
> +		dev_info(pdev->dev, "Delaying suspend by 2.5s to avoid platform bug\n");
> +		return true;
> +	}
> +	return false;
> +}
> +
>  static void amd_pmc_s2idle_prepare(void)
>  {
>  	struct amd_pmc_dev *pdev = &pmc;
> @@ -647,7 +668,8 @@ static void amd_pmc_s2idle_check(void)
>  	struct amd_pmc_dev *pdev = &pmc;
>  	int rc;
>  
> -	if (amd_pmc_intermediate_wakeup_need_delay(pdev))
> +	if (amd_pmc_intermediate_wakeup_need_delay(pdev) ||
> +	    amd_pmc_want_suspend_delay(pdev))

Thanks, this looks much cleaner. :-)

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>

>  		msleep(2500);
>  
>  	/* Dump the IdleMask before we add to the STB */
> diff --git a/drivers/platform/x86/amd/pmc/pmc.h b/drivers/platform/x86/amd/pmc/pmc.h
> index fe3f53eb5955..f5257e47b8c4 100644
> --- a/drivers/platform/x86/amd/pmc/pmc.h
> +++ b/drivers/platform/x86/amd/pmc/pmc.h
> @@ -147,6 +147,7 @@ enum amd_pmc_def {
>  };
>  
>  void amd_pmc_process_restore_quirks(struct amd_pmc_dev *dev);
> +bool amd_pmc_quirk_need_suspend_delay(struct amd_pmc_dev *dev);
>  void amd_pmc_quirks_init(struct amd_pmc_dev *dev);
>  void amd_mp2_stb_init(struct amd_pmc_dev *dev);
>  void amd_mp2_stb_deinit(struct amd_pmc_dev *dev);
> 

-- 
 i.