platform/x86: thinkpad_acpi: Register a privacy-screen device
authorHans de Goede <hdegoede@redhat.com>
Tue, 5 Oct 2021 20:23:20 +0000 (22:23 +0200)
committerHans de Goede <hdegoede@redhat.com>
Thu, 14 Oct 2021 11:25:13 +0000 (13:25 +0200)
commitf809891ee51b706e1a2a42998d8766c120660796
tree35b4e3f4e7d504f321a9a8eb66009653f6a675c7
parente8b7eb66738f559da1688ef3e4038180d7343547
platform/x86: thinkpad_acpi: Register a privacy-screen device

Register a privacy-screen device on laptops with a privacy-screen,
this exports the PrivacyGuard features to user-space using a
standardized vendor-agnostic sysfs interface. Note the sysfs interface
is read-only.

Registering a privacy-screen device with the new privacy-screen class
code will also allow the GPU driver to get a handle to it and export
the privacy-screen setting as a property on the DRM connector object
for the LCD panel. This DRM connector property is a new standardized
interface which all user-space code should use to query and control
the privacy-screen.

Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Mark Pearson <markpearson@lenovo.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211005202322.700909-9-hdegoede@redhat.com
drivers/platform/x86/Kconfig
drivers/platform/x86/thinkpad_acpi.c