linux-kernel - Re: [PATCH v6 09/13] HID: i2c-hid: acpi: Stop setting wakeup

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Date:   Thu, 12 Jan 2023 20:57:50 +0100
From:   Werner Sembach <wse@...edocomputers.com>
To:     Raul E Rangel <rrangel@...omium.org>, linux-acpi@...r.kernel.org,
        linux-input@...r.kernel.org
Cc:     andriy.shevchenko@...ux.intel.com, dmitry.torokhov@...il.com,
        hdegoede@...hat.com, rafael@...nel.org,
        mika.westerberg@...ux.intel.com, mario.limonciello@....com,
        timvp@...gle.com, linus.walleij@...aro.org, jingle.wu@....com.tw,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Alistair Francis <alistair@...stair23.me>,
        Jiri Kosina <jikos@...nel.org>, Rob Herring <robh@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 09/13] HID: i2c-hid: acpi: Stop setting wakeup_capable

Hi,

Am 29.09.22 um 18:19 schrieb Raul E Rangel:
> This is now handled by the i2c-core drive >
> Signed-off-by: Raul E Rangel <rrangel@...omium.org>
> Acked-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
> ---
> 
> (no changes since v5)
> 
> Changes in v5:
> - Added Acked-by: Benjamin Tissoires
> 
>   drivers/hid/i2c-hid/i2c-hid-acpi.c | 5 -----
>   1 file changed, 5 deletions(-)
> 
> diff --git a/drivers/hid/i2c-hid/i2c-hid-acpi.c b/drivers/hid/i2c-hid/i2c-hid-acpi.c
> index b96ae15e0ad917e..375c77c3db74d92 100644
> --- a/drivers/hid/i2c-hid/i2c-hid-acpi.c
> +++ b/drivers/hid/i2c-hid/i2c-hid-acpi.c
> @@ -105,11 +105,6 @@ static int i2c_hid_acpi_probe(struct i2c_client *client)
>   
>   	acpi_device_fix_up_power(adev);
>   
> -	if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) {
> -		device_set_wakeup_capable(dev, true);
> -		device_set_wakeup_enable(dev, false);
> -	}
> -
>   	return i2c_hid_core_probe(client, &ihid_acpi->ops,
>   				  hid_descriptor_address, 0);
>   }

this patch is causing a regression on the Clevo NL50RU of which the touchpad 
instantly wakes up the device when going to sleep. That wasn't triggered until 
this patch by the default settings: Setting wake capable but not enabling it by 
default. So unless a user enabled it by hand, the device went correctly to sleep.

I'm not deep into this subsystem so I don't know what the best approach is to 
?work around this firmware bug?/?fix this issue?:
- Changing the default back again?
- Adding a quirk list for bad devices?
- Maybe this isn't a firmware bug, but the touchpad was not meant to wakeup the 
device and we can somehow detect that?

For reference: The debugging issue that lead me here: 
https://gitlab.freedesktop.org/drm/amd/-/issues/1722#note_1719789

Kind regards,
Werner