Re: [PATCH v9 2/8] dt-bindings: Introduce interconnect binding
From: Georgi Djakov
Date: Tue Nov 27 2018 - 13:05:45 EST
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