RFI: Tablet mode support on HP Pro x360 435 G9 w/ AMD Ryzen 7 5825U

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Dear all,

I'd like to have tablet mode support on my system, probably by means
an linux input device such as implemented in the intel platform
specific driver drivers/platform/x86/intel/vbtn.c [0]

In the end I hope GNOME eventually to rotate the systems display and
to show some virtual keyboard (upon users request), cf. for [3]

It appears there has already been a patch proposed  by the chromium
team to support device PNP0C60 [1] but not merged to [5].

Since the system of interest is a HP Probook, there is already a
driver providing virtual buttons,namely hp-wmi [6]. However, the
driver loads probes and loads successfully but doesn't provide any
additional functionality plus some non critical errors on incorrect
ACPI method calls.

I've noticed AMD has started to provide platform specific driver(s)
such as pmf [2]. To my knowledge there is no support for CEZANNE/green
sardine based systems (yet).

What would be recommended practice and subsystem/folder to provide
such capability by means of a (platform specific) driver? At least the
CID PNP0C60 seems to be held by Microsoft [4] and thus be common to
both amd and intel platforms [4]. However, HID INT33D6 is held by
Intel and HID AMDI0081 by AMD. Yet I'm not quite sure if
iio-sensor-proxy [7] needs to be involved, too.

Best regards,
Carsten Hatger

[0] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/platform/x86/intel/vbtn.c?h=v6.2-rc8
[1] https://lore.kernel.org/lkml/1472628817-3145-1-git-send-email-wnhuang@xxxxxxxxxx/
[2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/platform/x86/amd/pmf?h=v6.2-rc8
[3] https://gitlab.gnome.org/GNOME/mutter/-/issues/1760
[4] https://learn.microsoft.com/en-us/windows-hardware/drivers/gpiobtn/button-implementation
[5] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/acpi/button.c?h=v6.2-rc8
[6] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/platform/x86/hp/hp-wmi.c?h=v6.2-rc8
[7] https://gitlab.freedesktop.org/hadess/iio-sensor-proxy/



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