linux-kernel - Re: [PATCH v4 00/12] DDR/L3 Scaling support on SDM845 and SC7180 SoCs

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Date:   Wed, 6 May 2020 18:08:34 +0530
From:   Amit Kucheria <amit.kucheria@...aro.org>
To:     Sibi Sankar <sibis@...eaurora.org>
Cc:     Viresh Kumar <viresh.kumar@...aro.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Georgi Djakov <georgi.djakov@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Saravana Kannan <saravanak@...gle.com>,
        Matthias Kaehlcke <mka@...omium.org>,
        Nishanth Menon <nm@...com>, Andy Gross <agross@...nel.org>,
        David Brown <david.brown@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
        Linux PM list <linux-pm@...r.kernel.org>,
        Douglas Anderson <dianders@...omium.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Lukasz Luba <lukasz.luba@....com>,
        Sudeep Holla <sudeep.holla@....com>
Subject: Re: [PATCH v4 00/12] DDR/L3 Scaling support on SDM845 and SC7180 SoCs

On Tue, May 5, 2020 at 1:54 AM Sibi Sankar <sibis@...eaurora.org> wrote:
>
> This patch series aims to extend cpu based scaling support to L3/DDR on
> SDM845 and SC7180 SoCs.
>
> Patches [1-3] - Blacklist SDM845 and SC7180 in cpufreq-dt-platdev
> Patches [4-8] - Update bw levels based on cpu frequency change
> Patches [9-10] - Add tag setting support to OPP
> Patches [11-12] - Add the cpu opp tables for SDM845 and SC7180 SoCs.
>
> Depends on the following series:
> https://lore.kernel.org/patchwork/cover/1230626/

Are there any other dependencies for this series? I tried applying
this on top of Georgi's series on v5.7-rc3. Patch 12 didn't apply
cleanly and needed a manual fixup for the include change.

Compilation failed with:
Error: /home/amit/work/sources/worktree-review-pipeline/arch/arm64/boot/dts/qcom/sc7180.dtsi:101.30-31
syntax error
FATAL ERROR: Unable to parse input tree

I've been squinting at the offending lines with no success:
                        interconnects = <&gem_noc MASTER_APPSS_PROC
&mc_virt SLAVE_EBI1>,
                                        <&osm_l3 MASTER_OSM_L3_APPS
&osm_l3 SLAVE_OSM_L3>;

> Georgi,
>  Would it make sense to include tag support patches [9-10] in your next
>  re-spin?
>
> V4:
>  * Migrate to using Georgi's new bindings
>  * Misc fixups based on Matthias comments
>  * API fixups based on Bjorn's comments on v2
>  * Picked up a few R-bs from Matthias
>
> v3:
>  * Migrated to using Saravana's opp-kBps bindings [1]
>  * Fixed some misc comments from Rajendra
>  * Added support for SC7180
>
> v2:
>  * Incorporated Viresh's comments from:
>  https://lore.kernel.org/lkml/20190410102429.r6j6brm5kspmqxc3@vireshk-i7/
>  https://lore.kernel.org/lkml/20190410112516.gnh77jcwawvld6et@vireshk-i7/
>  * Dropped cpufreq-map passive governor
>
> Sibi Sankar (12):
>   arm64: dts: qcom: sdm845: Add SoC compatible to MTP
>   cpufreq: blacklist SDM845 in cpufreq-dt-platdev
>   cpufreq: blacklist SC7180 in cpufreq-dt-platdev
>   OPP: Add and export helper to update voltage
>   OPP: Add and export helper to set bandwidth
>   cpufreq: qcom: Update the bandwidth levels on frequency change
>   OPP: Add and export helper to get icc path count
>   cpufreq: qcom: Disable fast switch when scaling ddr/l3
>   dt-bindings: interconnect: Add interconnect-tags bindings
>   OPP: Add support for setting interconnect-tags
>   arm64: dts: qcom: sdm845: Add cpu OPP tables
>   arm64: dts: qcom: sc7180: Add cpu OPP tables
>
>  .../bindings/interconnect/interconnect.txt    |   5 +
>  arch/arm64/boot/dts/qcom/sc7180.dtsi          | 168 ++++++++++++
>  arch/arm64/boot/dts/qcom/sdm845-mtp.dts       |   2 +-
>  arch/arm64/boot/dts/qcom/sdm845.dtsi          | 258 ++++++++++++++++++
>  drivers/cpufreq/cpufreq-dt-platdev.c          |   2 +
>  drivers/cpufreq/qcom-cpufreq-hw.c             |  89 +++++-
>  drivers/opp/core.c                            | 114 ++++++++
>  drivers/opp/of.c                              |  25 +-
>  include/linux/pm_opp.h                        |  22 ++
>  9 files changed, 675 insertions(+), 10 deletions(-)
>
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project