Re: [PATCH 0/4] Add sustainable OPP concept

Viresh Kumar
2020-10-29T07:54:44Z

On 29-10-20, 13:10, Viresh Kumar wrote:
> On 28-10-20, 14:08, Lukasz Luba wrote:
> > Hi all,
> >
> > This patch set introduces a concept of sustainable OPP, which then can be used
> > by kernel frameworks or governors for estimating system sustainable system
> > state. This kind of estimation is done e.g. in thermal governor Intelligent
> > Power Allocation (IPA), which calculates sustainable power of the whole system
> > and then derives some coefficients for internal algorithm.
> >
> > The patch set introduces a new DT bindings 'opp-sustainable', with parsing
> > code. It also adds a function (in patch 3/4) which allows device drivers to set
> > directly the sustainable OPP. This is helpful when the device drivers populate
> > the OPP table by themself (example in patch 4/4).
> >
>
> Can we please have some more information about this ? What does the
> sustainable OPP mean ? How will platform guys know or learn about this
> ? How we are going to use it finally ? What does it have to do with
> temperature of the SoC or the thermal affects, etc.

And that we need a real user of this first if it is ever going to be
merged.

--
viresh