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From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Sudeep Holla <sudeep.holla@arm.com>
Cc: linux-acpi@vger.kernel.org, Vikas Sajjan <vikas.cha.sajjan@hpe.com>,
        Sunil <sunil.vl@hpe.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Prashanth Prakash <pprakash@codeaurora.org>,
        Al Stone <al.stone@linaro.org>,
        Ashwin Chaugule <ashwin.chaugule@linaro.org>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v6 0/5] ACPI / processor_idle: Add ACPI v6.0 LPI support
Date: Sat, 25 Jun 2016 02:23:16 +0200
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On Thursday, June 23, 2016 02:42:57 AM Rafael J. Wysocki wrote:
> On Wednesday, June 22, 2016 06:45:15 PM Sudeep Holla wrote:
> > Hi Rafael,
> > 
> > On 14/06/16 15:48, Sudeep Holla wrote:
> > > ACPI 6.0 introduced LPI(Low Power Idle) states that provides an alternate
> > > method to describe processor idle states. It extends the specification
> > > to allow the expression of idle states like C-states selectable by the
> > > OSPM when a processor goes idle, but may affect more than one processor,
> > > and may affect other system components.
> > >
> > > LPI extensions leverages the processor container device(again introduced
> > > in ACPI 6.0) allowing to express which parts of the system are affected
> > > by a given LPI state. It defines the local power states for each node
> > > in a hierarchical processor topology. The OSPM can use _LPI object to
> > > select a local power state for each level of processor hierarchy in the
> > > system. They used to produce a composite power state request that is
> > > presented to the platform by the OSPM.
> > >
> > > Since multiple processors affect the idle state for any non-leaf hierarchy
> > > node, coordination of idle state requests between the processors is
> > > required. ACPI supports two different coordination schemes: Platform
> > > coordinated and  OS initiated.
> > >
> > > This series aims at providing basic and initial support for platform
> > > coordinated LPI states.
> > >
> > 
> > Gentle ping, was hoping to target this series for v4.8
> 
> On my list of things to take care of this week.  But this is a long list ...

Well, there are comments from Lorenzo and Daniel that need addressing,
so can you please do that and resend?

Thanks,
Rafael