linux-kernel - [PATCH v5 0/5] interconnect: qcom: icc-rpm: Support bucket

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Date:   Mon, 11 Jul 2022 19:52:35 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Georgi Djakov <djakov@...nel.org>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Rob Herring <robh+dt@...nel.org>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v5 0/5] interconnect: qcom: icc-rpm: Support bucket

This patch set is to support bucket in icc-rpm driver, so it implements
the similar mechanism in the icc-rpmh driver.

We can use interconnect path tag to indicate the bandwidth voting is for
which buckets, and there have three kinds of buckets: AWC, WAKE and
SLEEP, finally the wake and sleep bucket values are used to set the
corresponding clock (active and sleep clocks).  So far, we keep the AWC
bucket but doesn't really use it.

Patches 01, 02, 03 enable interconnect path tag and update the DT
binding document; patches 04 and 05 support bucket and use bucket values
to set the bandwidth and clock rates.

Note, this patch set is dependent on an out of tree patch "interconnect:
icc-rpm: Set destination bandwidth as well as source bandwidth" [1].
With the dependent patch, this patch set can be cleanly applied on the
Linux kernel master branch with the latest commit 32346491ddf2
("Linux 5.19-rc6").

[1] https://lore.kernel.org/linux-pm/20220707093823.1691870-1-bryan.odonoghue@linaro.org/T/#r304f7b103c806e1570d555a0f5aaf83ae3990ac0


Changes from v4:
- Added Krzysztof's Acked tag for DT binding document patch;
- Fixed the unalignment between function qcom_icc_pre_bw_aggregate() and
  its comment (Georgi);
- Simplified qcom_icc_bus_aggregate() with removing unused parameter
  'max_agg_peak';
- Removed unsed local variable 'max_peak_bw' in qcom_icc_set() (Georgi).

Changes from v3:
- Removed $ref and redundant sentence in DT binding document for
  '#interconnect-cells' (Krzysztof Kozlowski).

Changes from v2:
- Fixed for DT checker error for command ''make DT_CHECKER_FLAGS=-m
  dt_binding_check' (Rob Herring).

Changes from v1:
- Added description for property "#interconnect-cells" (Rob Herring);
- Added Dimtry's reviewed tags for patches 02 and 03 (Dmitry Baryshkov);
- Rebased on the latest mainline kernel and resolved conflict.


Leo Yan (5):
  dt-bindings: interconnect: Update property for icc-rpm path tag
  interconnect: qcom: Move qcom_icc_xlate_extended() to a common file
  interconnect: qcom: icc-rpm: Change to use qcom_icc_xlate_extended()
  interconnect: qcom: icc-rpm: Support multiple buckets
  interconnect: qcom: icc-rpm: Set bandwidth and clock for bucket values

 .../bindings/interconnect/qcom,rpm.yaml       |   6 +-
 drivers/interconnect/qcom/Makefile            |   3 +
 drivers/interconnect/qcom/icc-common.c        |  34 +++++
 drivers/interconnect/qcom/icc-common.h        |  13 ++
 drivers/interconnect/qcom/icc-rpm.c           | 129 +++++++++++++++---
 drivers/interconnect/qcom/icc-rpm.h           |   6 +
 drivers/interconnect/qcom/icc-rpmh.c          |  26 +---
 drivers/interconnect/qcom/icc-rpmh.h          |   1 -
 drivers/interconnect/qcom/sm8450.c            |   1 +
 9 files changed, 176 insertions(+), 43 deletions(-)
 create mode 100644 drivers/interconnect/qcom/icc-common.c
 create mode 100644 drivers/interconnect/qcom/icc-common.h

-- 
2.25.1