[PATCH 0/3][SRU][OEM-6.0/Unstable] Support for AMD PMF Cool and Quiet Framework (CnQF)

[You-Sheng Yang]

From: "You-Sheng Yang (vicamo)" <vicamo.yang at canonical.com>

BugLink: https://bugs.launchpad.net/bugs/1991609

[Impact]

Missing AMD CnQF that will dynamically adjust performance and power
consumption based upon OEM specified metrics on supported systems.

[Fix]

Three commits from linux-next to be backported to oem-6.0 and above.

[Test Case]

To enable this in AMD Phoenix CRB:

  BIOS: AMD PBS > AMD PMF Settings, enable function 11/12 & flag=1

And feature enabled message should appear in dmesg:

  [ 3.203628] amd-pmf AMDI0102:00: registered PMF device successfully

Access via sysfs:

  root at test:/sys/devices/platform/AMDI0102:00# cat cnqf_enable
  on

[Where problems could occur]

This is a new feature and will probably receive some more fixes in the
future. So far we have little, in both kernel and userspace, runtime and
testing, involved.

[Other Info]

This series depends on AMD PMF support in bug 1987670. And since these
patches targets v6.1 and AMD phoenix target oem-6.0, only oem-6.0 and
unstable is nominated for fix.

Shyam Sundar S K (3):
  platform/x86/amd/pmf: Add support for CnQF
  platform/x86/amd/pmf: Add sysfs to toggle CnQF
  Documentation/ABI/testing/sysfs-amd-pmf: Add ABI doc for AMD PMF

 Documentation/ABI/testing/sysfs-amd-pmf |  13 +
 MAINTAINERS                             |   1 +
 drivers/platform/x86/amd/pmf/Makefile   |   2 +-
 drivers/platform/x86/amd/pmf/acpi.c     |  10 +
 drivers/platform/x86/amd/pmf/cnqf.c     | 395 ++++++++++++++++++++++++
 drivers/platform/x86/amd/pmf/core.c     |  25 +-
 drivers/platform/x86/amd/pmf/pmf.h      | 100 ++++++
 7 files changed, 544 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/ABI/testing/sysfs-amd-pmf
 create mode 100644 drivers/platform/x86/amd/pmf/cnqf.c

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2.37.2