Re: [PATCH v9 2/8] dt-bindings: Introduce interconnect binding

Sudeep Holla
2018-09-26T14:48:30Z

On Wed, Sep 26, 2018 at 05:42:15PM +0300, Georgi Djakov wrote:
> Hi Rob,
>
> Thanks for the comments!
>
> On 09/25/2018 09:02 PM, Rob Herring wrote:
> > On Fri, Aug 31, 2018 at 05:01:45PM +0300, Georgi Djakov wrote:
> >> This binding is intended to represent the relations between the interconnect
> >> controllers (providers) and consumer device nodes. It will allow creating links
> >> between consumers and interconnect paths (exposed by interconnect providers).
> >
> > As I mentioned in person, I want to see other SoC families using this
> > before accepting. They don't have to be ready for upstream, but WIP
> > patches or even just a "yes, this works for us and we're going to use
> > this binding on X".
>
> Other than the 3 Qualcomm SoCs (msm8916, msm8996, sdm845) that are
> currently using this binding, there is ongoing work from at least two
> other vendors that would be using this same binding. I will check on
> what is their progress so far.
>
> > Also, I think the QCom GPU use of this should be fully sorted out. Or
> > more generically how this fits into OPP binding which seems to be never
> > ending extended...
>
> I see this as a further step. It could be OPP binding which include
> bandwidth values or some separate DT property. Jordan has already
> proposed something, do you have any initial comments on that?

I am curious as how this fits into new systems which have firmware driven
CPUFreq and other DVFS. I would like to avoid using this in such systems
and leave it upto the firmware to scale the bus/interconnect based on the
other components that are connected to it and active.

--
Regards,
Sudeep