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From: Andrew Kallmeyer <kallmeyeras@gmail.com>
To: platform-driver-x86@vger.kernel.org
Subject: ideapad_laptop tablet mode toggle detection
Date: Tue, 28 Feb 2023 20:45:35 -0800	[thread overview]
Message-ID: <CAG4kvq9US=-NjyXFMzJYu2zCJryJWtOc7FGZbrewpgCDjdAkbg@mail.gmail.com> (raw)

Hello, I'm interested in detecting tablet mode switching for my Lenovo
Yoga laptop properly in the kernel. Ultimately I'd like to provide the
SW_TABLET_MODE input event.

I have found that there are ACPI events fired when the tablet mode is
toggled (both directions send the same event). Here are the logs:

kernel: ACPI BIOS Error (bug): Could not resolve symbol
[\_SB.PC00.LPCB.EC0._Q44.WM00], AE_NOT_FOUND (20221020/psargs-330)
kernel: ACPI Error: Aborting method \_SB.PC00.LPCB.EC0._Q44 due to
previous error (AE_NOT_FOUND) (20221020/psparse-529)
root[10258]: ACPI group/action undefined: 06129D99-6083- / 000000d0

When I looked at the code I found TP_HKEY_EV_TABLET_CHANGED in the
thinkpad_acpi.c driver which seems to have exactly the behavior I'm
looking for but with a different ACPI event number. Would it be
possible to do something like this in the ideapad_laptop driver?

             reply	other threads:[~2023-03-01  4:45 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-01  4:45 Andrew Kallmeyer [this message]
2023-03-04  5:46 ` ideapad_laptop tablet mode toggle detection Andrew Kallmeyer
2023-03-04 20:14   ` Maximilian Luz
2023-03-04 21:37     ` Armin Wolf
2023-03-05  5:42       ` Andrew Kallmeyer
2023-03-05 21:40         ` Armin Wolf
2023-03-05 22:59           ` Andrew Kallmeyer
2023-03-06  1:26             ` Armin Wolf
2023-03-06  1:41               ` Andrew Kallmeyer
2023-03-06  1:58                 ` Armin Wolf
2023-03-06  1:41               ` Armin Wolf
2023-03-06  8:38                 ` Hans de Goede
2023-03-08  5:14                   ` Andrew Kallmeyer
2023-03-08  5:21                     ` Andrew Kallmeyer
2023-03-08 10:13                     ` Hans de Goede

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