[Freedreno] [PATCH 5/9] arm64: dts: sdm845: Add gpu and gmu device nodes

[Jordan Crouse]

On Wed, Oct 10, 2018 at 08:21:39PM +0530, Viresh Kumar wrote:
> On 10-10-18, 08:48, Jordan Crouse wrote:
> > qcom,level comes straight from:
> > 
> > https://lore.kernel.org/lkml/20180627045234.27403-2-rnayak@codeaurora.org/
> > 
> > But in this case instead of using the CPU to program the RPMh we are passing
> > the value to a microprocessor (the GMU) and that will do the vote on our behalf
> > (Technically we use the value to look up the vote in the cmd-db database and
> > pass that to the GMU)
> > 
> > This is why the qcom,level was added in the first place so we could at least
> > share the nomenclature with the rpmhd if not the implementation.
> 
> How you actually pass the vote to the underlying hardware, RPMh or
> GMU, is irrelevant to the whole thing. What is important is how we
> describe that in DT and how we represent the whole thing.
> 
> We have chosen genpd + OPP to do this and same should be used by you
> as well. Another benefit is that the genpd core will do vote
> aggregation for you here.

I'm not sure what you are suggesting? The vote is represented in DT exactly as
described in the bindings. 

Jordan

> -- 
> viresh
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