linux-kernel - Re: [PATCH] Input: i8042 - add noloop quirk for Acer P459-G2-M

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Date:   Wed, 29 Nov 2023 11:31:43 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Esther Shimanovich <eshimanovich@...omium.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, linux-input@...r.kernel.org,
        Hans de Goede <hdegoede@...hat.com>,
        Jonathan Denose <jdenose@...omium.org>,
        Mattijs Korpershoek <mkorpershoek@...libre.com>,
        Werner Sembach <wse@...edocomputers.com>
Subject: Re: [PATCH] Input: i8042 - add noloop quirk for Acer P459-G2-M

On Tue, Nov 28, 2023 at 09:48:54PM +0000, Esther Shimanovich wrote:
> On the Acer P450-G2-M, after the user opens the laptop lid and the device
> resumes from S3 deep sleep, the screen remains dark for a few seconds.
> If the user presses a keyboard key while the screen is still dark, the
> mouse and keyboard stop functioning.
> 
> To fix this bug, enable the noloop quirk.

Are you sure that you want to disable loop and not mux mode? The only
time we issue the "AUX LOOP" command on resume is when we try to restore
MUX configuration...

> 
> Signed-off-by: Esther Shimanovich <eshimanovich@...omium.org>
> ---
> 
>  drivers/input/serio/i8042-acpipnpio.h | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/input/serio/i8042-acpipnpio.h b/drivers/input/serio/i8042-acpipnpio.h
> index 028e45bd050bf..b81539bacb931 100644
> --- a/drivers/input/serio/i8042-acpipnpio.h
> +++ b/drivers/input/serio/i8042-acpipnpio.h
> @@ -941,6 +941,14 @@ static const struct dmi_system_id i8042_dmi_quirk_table[] __initconst = {
>  		},
>  		.driver_data = (void *)(SERIO_QUIRK_NOPNP)
>  	},
> +	{
> +		/* Acer TravelMate P459-G2-M */
> +		.matches = {
> +			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
> +			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate P459-G2-M"),
> +		},
> +		.driver_data = (void *)(SERIO_QUIRK_NOLOOP)
> +	},
>  	{
>  		/* ULI EV4873 - AUX LOOP does not work properly */
>  		.matches = {
> -- 
> 2.43.0.rc1.413.gea7ed67945-goog
> 

Thanks.

-- 
Dmitry