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

Georgi Djakov
2018-11-27T18:05:39Z

Hi Rob,

On 9/26/18 17:42, 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".

Patches for the iMX7ULP platform are already available [1]. Thanks
Alexandre Bailon!

The interconnect API seems to be also a good fit for Nvidia SoCs. There
is an ongoing discussion about implementing an interconnect provider
driver for Tegra [2]. Thanks Thierry and Krishna!

In addition of the above, i also checked privately with a few other SoC
maintainers and made them aware of these patches. Some are not ready for
upstream yet, but the feedback was positive and i expect more SoCs to
make use of this in the future.

BR,
Georgi

[1] https://lkml.org/lkml/2018/11/17/368
[2] https://marc.info/?t=154056181900001&r=1&w=2

> 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?
>
> BR,
> Georgi
>