linux-kernel - Re: [PATCH v3 0/6] Split SDM845 interconnect nodes and consolidate RPMh support

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Date:   Mon, 24 Feb 2020 21:16:45 -0800
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     georgi.djakov@...aro.org
Cc:     Sibi Sankar <sibis@...eaurora.org>, robh+dt@...nel.org,
        evgreen@...omium.org, agross@...nel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, mark.rutland@....com,
        daidavid1@...eaurora.org, saravanak@...gle.com, mka@...omium.org,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH v3 0/6]     Split SDM845 interconnect nodes and
 consolidate RPMh support

On Sun 09 Feb 10:34 PST 2020, Sibi Sankar wrote:

Hi Georgi,

Will you pick up the bindings and driver patches for v5.7? So that I can
apply the dts patches.

Regards,
Bjorn

> While there are no current consumers of the SDM845 interconnect device in
> devicetree, take this opportunity to redefine the interconnect device nodes
> as the previous definitions of using a single child node under the apps_rsc
> device did not accurately capture the description of the hardware.
> The Network-On-Chip (NoC) interconnect devices should be represented in a
> manner akin to QCS404 platforms[1] where there is a separation of NoC devices
> and its RPM/RPMh counterparts.
> 
> The bcm-voter devices are representing the RPMh devices that the interconnect
> providers need to communicate with and there can be more than one instance of
> the Bus Clock Manager (BCM) which can live under different instances of Resource
> State Coordinators (RSC). There are display use cases where consumers may need
> to target a different bcm-voter (Some display specific RSC) than the default,
> and there needs to be a way to represent this connection in devicetree.
> 
> This patches series extends the discussions[2][3] involving the SDM845
> interconnect bindings by adding accompanying driver implementations
> using the split NoC devices. Some of the code used to support the SDM845
> provider driver are refactored into common modules that can used by other
> RPMh based interconnect providers such as SC7180[4]. This patch series also
> updates existing sdm845 binding documentation to DT schema format using
> json-schema.
> 
> v3:
> - Picked up Robs R-b for patch 1 
> - Fixup qcom,bcm-voter.yaml. comments (Rob)
> - Use qcom,bcm-voter instead of SoC specific compatible for
>   SDM845 and SC7180 (Odelu/Sibi)
> - Fixup bindings check failures for qcom,sdm845.yaml
> - Fixup the misc bugs. comments (Evan/Sibi)
> - Fixup reg size for aggre1/2_noc
> 
> v2: 
> - Reorganized dt-binding patches
> - Fixed a bug that adds duplicate BCM node to voter (Georgi)
> - Addressed misc. comments (Georgi)
> 
> v1: https://lkml.org/lkml/2019/12/16/15
> 
> [1]: https://lkml.org/lkml/2019/6/13/143
> [2]: https://lkml.org/lkml/2019/7/19/1063
> [3]: https://lkml.org/lkml/2019/10/16/1793
> [4]: https://lkml.org/lkml/2019/11/26/389
> 
> David Dai (6):
>   dt-bindings: interconnect: Convert qcom,sdm845 to DT schema
>   dt-bindings: interconnect: Add YAML schemas for QCOM bcm-voter
>   dt-bindings: interconnect: Update Qualcomm SDM845 DT bindings
>   interconnect: qcom: Consolidate interconnect RPMh support
>   interconnect: qcom: sdm845: Split qnodes into their respective NoCs
>   arm64: dts: sdm845: Redefine interconnect provider DT nodes
> 
>  .../bindings/interconnect/qcom,bcm-voter.yaml |   45 +
>  .../bindings/interconnect/qcom,sdm845.txt     |   24 -
>  .../bindings/interconnect/qcom,sdm845.yaml    |   74 +
>  arch/arm64/boot/dts/qcom/sdm845.dtsi          |   65 +-
>  drivers/interconnect/qcom/Kconfig             |   13 +-
>  drivers/interconnect/qcom/Makefile            |    4 +
>  drivers/interconnect/qcom/bcm-voter.c         |  366 +++++
>  drivers/interconnect/qcom/bcm-voter.h         |   27 +
>  drivers/interconnect/qcom/icc-rpmh.c          |  147 ++
>  drivers/interconnect/qcom/icc-rpmh.h          |  149 +++
>  drivers/interconnect/qcom/sdm845.c            | 1185 +++++++----------
>  .../dt-bindings/interconnect/qcom,sdm845.h    |  263 ++--
>  12 files changed, 1516 insertions(+), 846 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/interconnect/qcom,bcm-voter.yaml
>  delete mode 100644 Documentation/devicetree/bindings/interconnect/qcom,sdm845.txt
>  create mode 100644 Documentation/devicetree/bindings/interconnect/qcom,sdm845.yaml
>  create mode 100644 drivers/interconnect/qcom/bcm-voter.c
>  create mode 100644 drivers/interconnect/qcom/bcm-voter.h
>  create mode 100644 drivers/interconnect/qcom/icc-rpmh.c
>  create mode 100644 drivers/interconnect/qcom/icc-rpmh.h
> 
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project