linux-kernel - Re: [PATCH 2/2] gpiolib-acpi: Don't set GPIOs for wakeup in S3 mode

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Date:   Mon, 23 Jan 2023 14:23:06 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Mario Limonciello <mario.limonciello@....com>
Cc:     Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Raul E Rangel <rrangel@...omium.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Wolfram Sang <wsa@...nel.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Nathan Smythe <ncsmythe@...uboak.org>,
        linux-gpio@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] gpiolib-acpi: Don't set GPIOs for wakeup in S3 mode

On Sat, Jan 21, 2023 at 07:48:11AM -0600, Mario Limonciello wrote:
> commit 1796f808e4bb ("HID: i2c-hid: acpi: Stop setting wakeup_capable")
> adjusted the policy to enable wakeup by default if the ACPI tables
> indicated that a device was wake capable.
> 
> It was reported however that this broke suspend on at least two System76
> systems in S3 mode and two Lenovo Gen2a systems, but only with S3.
> When the machines are set to s2idle, wakeup behaves properly.
> 
> Configuring the GPIOs for wakeup with S3 doesn't work properly, so only
> set it when the system supports low power idle.

Fine by me,
Acked-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

> Fixes: 1796f808e4bb ("HID: i2c-hid: acpi: Stop setting wakeup_capable")
> Fixes: b38f2d5d9615c ("i2c: acpi: Use ACPI wake capability bit to set wake_irq")
> Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2357
> Link: https://bugzilla.redhat.com/show_bug.cgi?id=2162013
> Reported-by: Nathan Smythe <ncsmythe@...uboak.org>
> Tested-by: Nathan Smythe <ncsmythe@...uboak.org>
> Suggested-by: Raul Rangel <rrangel@...omium.org>
> Signed-off-by: Mario Limonciello <mario.limonciello@....com>
> ---
>  drivers/gpio/gpiolib-acpi.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
> index 9ef0f5641b521..17c53f484280f 100644
> --- a/drivers/gpio/gpiolib-acpi.c
> +++ b/drivers/gpio/gpiolib-acpi.c
> @@ -1104,7 +1104,8 @@ int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name, in
>  				dev_dbg(&adev->dev, "IRQ %d already in use\n", irq);
>  			}
>  
> -			if (wake_capable)
> +			/* avoid suspend issues with GPIOs when systems are using S3 */
> +			if (wake_capable && acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)
>  				*wake_capable = info.wake_capable;
>  
>  			return irq;
> -- 
> 2.34.1
> 

-- 
With Best Regards,
Andy Shevchenko