Hi,

Here are the minutes I took, its always difficult to capture everything
so I apologise if I missed something or misrepresented.

ACPI Power Management
---------------------

Not sure if it is ACPI core or driver that calls _PS? methods, Graeme
thinks
it is ACPI core. Must check.

PSCI transitions do not go through AML

Where people say "UEFI" when talking about hardware initialisation this
actually means
that by the time we enter kernel it will have been done. This does not
actually
mean UEFI needs to do this.

Fine grained means devices, so if two children shut off its upto
firmware to work
out and shut down the parent.

ASWG ASAP items, new GIC tables, flags for PSCI, GTDT memory mapped
timers.

Is there a way to repeat runtime PM ability to not shutdown due to
latency cost. Will
need to be investigated.

If using an embedded power controller, what is the path for events.

There is a general lack of latency type control in ACPI. Also missing
dependencies
between devices and also devices states and C states.

At least one CPU is always in control of D-State transitions.

Improved CPU state change latency is in discussion in ASWG.

Discussion on extending the spec to allow for P-States on devices, this
would give
devfreq support for ACPI machines.

Dong Wei - Please participate in ASWG to improve the spec.


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