[PATCH v9 00/22] Add support for binding ACPI platform profile to multiple drivers

Mario Limonciello
2024-12-02T05:51:02Z

Currently there are a number of ASUS products on the market that happen to
have ACPI objects for amd-pmf to bind to as well as an ACPI platform
profile provided by asus-wmi.

The ACPI platform profile support created by amd-pmf on these ASUS
products is "Function 9" which is specifically for "BIOS or EC
notification" of power slider position. This feature is actively used
by some designs such as Framework 13 and Framework 16.

On these ASUS designs we keep on quirking more and more of them to turn
off this notification so that asus-wmi can bind.

This however isn't how Windows works. "Multiple" things are notified for
the power slider position. This series adjusts Linux to behave similarly.

Multiple drivers can now register an ACPI platform profile and will react
to set requests.

To avoid chaos, only positions that are common to both drivers are
accepted when the legacy /sys/firmware/acpi/platform_profile interface
is used.

This series also adds a new concept of a "custom" profile. This allows
userspace to discover that there are multiple driver handlers that are
configured differently.

This series also allows dropping all of the PMF quirks from amd-pmf.

NOTE: Although this series changes code in acpi platform profile, I think
it is better to go through the platform-x86 tree as more drivers can
be introduced during the kernel cycle and should make the changes to
support class interface when merging.
---
v9:
- Rebase on top of 6.13-rc1 tag
- Fix LKP reported issues on patch 2
- Use Markus' logic update suggestion

Mario Limonciello (22):
ACPI: platform-profile: Add a name member to handlers
platform/x86/dell: dell-pc: Create platform device
ACPI: platform_profile: Add device pointer into platform profile
handler
ACPI: platform_profile: Add platform handler argument to
platform_profile_remove()
ACPI: platform_profile: Pass the profile handler into
platform_profile_notify()
ACPI: platform_profile: Move sanity check out of the mutex
ACPI: platform_profile: Move matching string for new profile out of
mutex
ACPI: platform_profile: Use guard(mutex) for register/unregister
ACPI: platform_profile: Use `scoped_cond_guard`
ACPI: platform_profile: Create class for ACPI platform profile
ACPI: platform_profile: Add name attribute to class interface
ACPI: platform_profile: Add choices attribute for class interface
ACPI: platform_profile: Add profile attribute for class interface
ACPI: platform_profile: Notify change events on register and
unregister
ACPI: platform_profile: Only show profiles common for all handlers
ACPI: platform_profile: Add concept of a "custom" profile
ACPI: platform_profile: Make sure all profile handlers agree on
profile
ACPI: platform_profile: Check all profile handler to calculate next
ACPI: platform_profile: Notify class device from
platform_profile_notify()
ACPI: platform_profile: Allow multiple handlers
platform/x86/amd: pmf: Drop all quirks
Documentation: Add documentation about class interface for platform
profiles

.../ABI/testing/sysfs-platform_profile | 5 +
.../userspace-api/sysfs-platform_profile.rst | 31 ++
drivers/acpi/platform_profile.c | 523 ++++++++++++++----
.../surface/surface_platform_profile.c | 8 +-
drivers/platform/x86/acer-wmi.c | 12 +-
drivers/platform/x86/amd/pmf/Makefile | 2 +-
drivers/platform/x86/amd/pmf/core.c | 1 -
drivers/platform/x86/amd/pmf/pmf-quirks.c | 66 ---
drivers/platform/x86/amd/pmf/pmf.h | 3 -
drivers/platform/x86/amd/pmf/sps.c | 4 +-
drivers/platform/x86/asus-wmi.c | 8 +-
drivers/platform/x86/dell/alienware-wmi.c | 8 +-
drivers/platform/x86/dell/dell-pc.c | 38 +-
drivers/platform/x86/hp/hp-wmi.c | 8 +-
drivers/platform/x86/ideapad-laptop.c | 6 +-
.../platform/x86/inspur_platform_profile.c | 7 +-
drivers/platform/x86/thinkpad_acpi.c | 16 +-
include/linux/platform_profile.h | 9 +-
18 files changed, 541 insertions(+), 214 deletions(-)
delete mode 100644 drivers/platform/x86/amd/pmf/pmf-quirks.c

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2.43.0