Re: [PATCH 00/53] icc-rpmh multi-RSC voting groundwork

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Hi Konrad,

On 11.07.23 15:17, Konrad Dybcio wrote:
Many parts of Qualcomm SoCs are entirely independent of each other and can
run when the other parts are off. The RPMh system architecture embraces
this by giving each (loosely defined) subsystem its own connection (as in,
physical wires) to the AOSS, terminated by per-subsystem RSCs (Resource
State Coordinators) that barter for power, bandwidth etc.

This series introduces the groundwork necessary for voting for resources
through non-APPS RSCs. It should allow for lower-latency vote adjustments
(e.g. for very high bandwidth / multiple displays) and could potentially
allow for full APSS collapse while keeping e.g. MDSS operating (say
refreshing an image from a RAM buffer).

This is good stuff. Thanks for working on it! Actually the path tagging,
that have been introduced some time ago could be used for supporting the
multiple RSCs. Today we can get the tags from DT, and tag the path with
some DISP_RSC flag (for example) and avoid the qcom,bcm-voter-idx property.

Mike has been also looking into this, so maybe he can share his thoughts.


On top of that, a rather necessary and overdue cleanup is performed to
stop adding more and more arguments to the insane preprocessor macros.


Retiring the DEFINE_QNODE is good clean-up, but some patches failed to
apply so a re-base would be needed.

Thanks,
Georgi

Partially reverting (or reimplementing the revert) [1] will be necessary
to coordinate the rather complex relationship between the DPU and RSC
drivers.

The "Point x paths to the x RSC" patches won't do anything (check the
compatibility workaround qcom_icc_pre_aggregate()) until disp_rsc is
properly described in the device tree, along with its BCM voter),
but they prepare ground for when that happens.

I was able to test sending requests through the DISP_RSC on SM8450, but
I had to hack its clocks (_rscc_ in dispcc) to be always-on, as we don't
have any clk handling for qcom,rpmh-rsc today.

Boot-tested on SM8350 and SM8450, nothing exploded.

[1] https://patchwork.kernel.org/project/dri-devel/patch/1521827074-28424-1-git-send-email-ryadav@xxxxxxxxxxxxxx/

Dependencies:
[2] https://lore.kernel.org/linux-arm-msm/113b50f8-35f6-73fc-4fc9-302262927c5e@xxxxxxxxxxx/
[3] https://lore.kernel.org/linux-arm-msm/20230703-topic-8250_qup_icc-v2-0-9ba0a9460be2@xxxxxxxxxx/

Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
---
Konrad Dybcio (53):
       dt-bindings: interconnect: qcom,icc: Introduce fixed BCM voter indices
       dt-bindings: interconnect: qcom,bcm-voter: Add qcom,bcm-voter-idx
       interconnect: qcom: icc-rpmh: Store direct BCM voter references
       interconnect: qcom: icc-rpmh: Retire dead code
       interconnect: qcom: icc-rpmh: Implement voting on non-APPS RSCs
       interconnect: qcom: sc7180: Retire DEFINE_QNODE
       interconnect: qcom: sdm670: Retire DEFINE_QNODE
       interconnect: qcom: sdm845: Retire DEFINE_QNODE
       interconnect: qcom: sdx55: Retire DEFINE_QNODE
       interconnect: qcom: sdx65: Retire DEFINE_QNODE
       interconnect: qcom: sm6350: Retire DEFINE_QNODE
       interconnect: qcom: sm8150: Retire DEFINE_QNODE
       interconnect: qcom: sm8250: Retire DEFINE_QNODE
       interconnect: qcom: sm8350: Retire DEFINE_QNODE
       interconnect: qcom: icc-rpmh: Retire DEFINE_QNODE
       interconnect: qcom: sc7180: Retire DEFINE_QBCM
       interconnect: qcom: sdm670: Retire DEFINE_QBCM
       interconnect: qcom: sdm845: Retire DEFINE_QBCM
       interconnect: qcom: sdx55: Retire DEFINE_QBCM
       interconnect: qcom: sdx65: Retire DEFINE_QBCM
       interconnect: qcom: sm6350: Retire DEFINE_QBCM
       interconnect: qcom: sm8150: Retire DEFINE_QBCM
       interconnect: qcom: sm8250: Retire DEFINE_QBCM
       interconnect: qcom: sm8350: Retire DEFINE_QBCM
       interconnect: qcom: icc-rpmh: Retire DEFINE_QBCM
       interconnect: qcom: qdu1000: Explicitly assign voter_idx
       interconnect: qcom: sa8775p: Explicitly assign voter_idx
       interconnect: qcom: sc7280: Explicitly assign voter_idx
       interconnect: qcom: sc8180x: Explicitly assign voter_idx
       interconnect: qcom: sc8280xp: Explicitly assign voter_idx
       interconnect: qcom: sm8450: Explicitly assign voter_idx
       interconnect: qcom: sm8550: Explicitly assign voter_idx
       arm64: dts: qcom: qdu1000: add qcom,bcm-voter-idx
       arm64: dts: qcom: sa8775p: add qcom,bcm-voter-idx
       arm64: dts: qcom: sc7180: add qcom,bcm-voter-idx
       arm64: dts: qcom: sc7280: add qcom,bcm-voter-idx
       arm64: dts: qcom: sc8180x: add qcom,bcm-voter-idx
       arm64: dts: qcom: sc8280xp: add qcom,bcm-voter-idx
       arm64: dts: qcom: sdm670: add qcom,bcm-voter-idx
       arm64: dts: qcom: sdm845: add qcom,bcm-voter-idx
       arm64: dts: qcom: sdx75: add qcom,bcm-voter-idx
       arm64: dts: qcom: sm6350: add qcom,bcm-voter-idx
       arm64: dts: qcom: sm8150: add qcom,bcm-voter-idx
       arm64: dts: qcom: sm8250: add qcom,bcm-voter-idx
       arm64: dts: qcom: sm8350: add qcom,bcm-voter-idx
       arm64: dts: qcom: sm8450: add qcom,bcm-voter-idx
       arm64: dts: qcom: sm8550: add qcom,bcm-voter-idx
       arm64: dts: qcom: sdx55: add qcom,bcm-voter-idx
       arm64: dts: qcom: sdx65: add qcom,bcm-voter-idx
       interconnect: qcom: sm8350: Point display paths to the display RSC
       interconnect: qcom: sm8450: Point display paths to the display RSC
       interconnect: qcom: sm8550: Point display paths to the display RSC
       interconnect: qcom: sm8550: Point camera paths to the camera RSC

  .../bindings/interconnect/qcom,bcm-voter.yaml      |   10 +
  arch/arm/boot/dts/qcom/qcom-sdx55.dtsi             |    1 +
  arch/arm/boot/dts/qcom/qcom-sdx65.dtsi             |    1 +
  arch/arm64/boot/dts/qcom/qdu1000.dtsi              |    2 +
  arch/arm64/boot/dts/qcom/sa8775p.dtsi              |    1 +
  arch/arm64/boot/dts/qcom/sc7180.dtsi               |    1 +
  arch/arm64/boot/dts/qcom/sc7280.dtsi               |    2 +
  arch/arm64/boot/dts/qcom/sc8180x.dtsi              |    2 +
  arch/arm64/boot/dts/qcom/sc8280xp.dtsi             |    2 +
  arch/arm64/boot/dts/qcom/sdm670.dtsi               |    2 +
  arch/arm64/boot/dts/qcom/sdm845.dtsi               |    2 +
  arch/arm64/boot/dts/qcom/sdx75.dtsi                |    2 +
  arch/arm64/boot/dts/qcom/sm6350.dtsi               |    1 +
  arch/arm64/boot/dts/qcom/sm8150.dtsi               |    2 +
  arch/arm64/boot/dts/qcom/sm8250.dtsi               |    2 +
  arch/arm64/boot/dts/qcom/sm8350.dtsi               |    2 +
  arch/arm64/boot/dts/qcom/sm8450.dtsi               |    2 +
  arch/arm64/boot/dts/qcom/sm8550.dtsi               |    2 +
  drivers/interconnect/qcom/bcm-voter.c              |   75 +-
  drivers/interconnect/qcom/bcm-voter.h              |    9 -
  drivers/interconnect/qcom/icc-rpmh.c               |   53 +-
  drivers/interconnect/qcom/icc-rpmh.h               |   14 +-
  drivers/interconnect/qcom/qdu1000.c                |   11 +
  drivers/interconnect/qcom/sa8775p.c                |   28 +
  drivers/interconnect/qcom/sc7180.c                 | 1637 +++++++++++++++--
  drivers/interconnect/qcom/sc7280.c                 |   27 +
  drivers/interconnect/qcom/sc8180x.c                |   23 +
  drivers/interconnect/qcom/sc8280xp.c               |   27 +
  drivers/interconnect/qcom/sdm670.c                 | 1410 +++++++++++++--
  drivers/interconnect/qcom/sdm845.c                 | 1683 ++++++++++++++++--
  drivers/interconnect/qcom/sdx55.c                  |  863 ++++++++-
  drivers/interconnect/qcom/sdx65.c                  |  850 ++++++++-
  drivers/interconnect/qcom/sm6350.c                 | 1551 +++++++++++++++--
  drivers/interconnect/qcom/sm8150.c                 | 1714 ++++++++++++++++--
  drivers/interconnect/qcom/sm8250.c                 | 1772 +++++++++++++++++--
  drivers/interconnect/qcom/sm8350.c                 | 1830 ++++++++++++++++++--
  drivers/interconnect/qcom/sm8450.c                 |   24 +
  drivers/interconnect/qcom/sm8550.c                 |   42 +
  include/dt-bindings/interconnect/qcom,icc.h        |    8 +
  39 files changed, 12320 insertions(+), 1370 deletions(-)
---
base-commit: 82cee168d497ffcb79e4889fe3c7384788e89f4d
change-id: 20230708-topic-rpmh_icc_rsc-f897080fb207

Best regards,




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