Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.32 as permitted sender) client-ip=23.128.96.32;
Date:   Mon, 20 Nov 2023 23:39:07 +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 RESEND] Input: i8042 - add Fujitsu Lifebook U728 to i8042 quirk table
Message-ID: <20231120233520.264264-2-szfabian@bluemarch.art>
Feedback-ID: 87830438:user:proton
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Precedence: bulk

Another Fujitsu-related patch.

In the initial boot stage the integrated keyboard of Fujitsu Lifebook U728
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
(04F3:3092) not working at all.

So this notebook uses a hid-over-i2c touchpad which is managed by the
i2c_designware input driver. Since you can't find a PS/2 mouse port on this
computer and you can't connect a PS/2 mouse to it even with an official
port replicator 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 configuration could be applied to Lifebook U748 and U758
too but I can't test this theory on these machines.
---
 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..983f31014330 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 U728 */
+=09=09.matches =3D {
+=09=09=09DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
+=09=09=09DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK U728"),
+=09=09},
+=09=09.driver_data =3D (void *)(SERIO_QUIRK_NOAUX)
+=09},
 =09{
 =09=09/* Gigabyte M912 */
 =09=09.matches =3D {
--=20
2.42.1