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Date:   Wed, 04 Oct 2023 01:17:54 +0000
To:     linux-kernel@vger.kernel.org, linux-input@vger.kernel.org,
        dmitry.torokhov@gmail.com
From:   Szilard Fabian <szfabian@bluemarch.art>
Cc:     Szilard Fabian <szfabian@bluemarch.art>
Subject: [PATCH] Input: i8042 - add Fujitsu Lifebook E5411 to i8042 quirk table
Message-ID: <20231004011749.101789-1-szfabian@bluemarch.art>
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In the initial boot stage the integrated keyboard of Fujitsu Lifebook E5411
refuses to work and it's not possible to type for example a dm-crypt
passphrase without the help of an external keyboard.

i8042.nomux kernel parameter resolves this issue but using that a PS/2
mouse is detected. This input device is unused even when the i2c-hid-acpi
kernel module is blacklisted making the integrated ELAN touchpad
(04F3:308A) not working at all.

Since the integrated touchpad is managed by the i2c_designware input
driver in the Linux kernel and you can't find a PS/2 mouse port on the
computer I think it's safe to not use the PS/2 mouse port at all.

Signed-off-by: Szilard Fabian <szfabian@bluemarch.art>
---
I think the same patch could be applied to E4411, E4511 and E5511 too
but sadly I can't test this theory. But these computers use the same
UEFI updates so I think there isn't much difference in input devices.
---
 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/i8=
042-acpipnpio.h
index 028e45bd050b..3f73fa69b8ce 100644
--- a/drivers/input/serio/i8042-acpipnpio.h
+++ b/drivers/input/serio/i8042-acpipnpio.h
@@ -618,6 +618,14 @@ static const struct dmi_system_id i8042_dmi_quirk_tabl=
e[] __initconst =3D {
 =09=09},
 =09=09.driver_data =3D (void *)(SERIO_QUIRK_NOMUX)
 =09},
+=09{
+=09=09/* Fujitsu Lifebook E5411 */
+=09=09.matches =3D {
+=09=09=09DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU CLIENT COMPUTING LIMITED"),
+=09=09=09DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E5411"),
+=09=09},
+=09=09.driver_data =3D (void *)(SERIO_QUIRK_NOAUX)
+=09},
 =09{
 =09=09/* Gigabyte M912 */
 =09=09.matches =3D {
--=20
2.42.0