mbox series

[v3,00/10] Fix up icc clock rate calculation on some platforms

Message ID 20230726-topic-icc_coeff-v3-0-dee684d6cdd2@linaro.org
Headers show
Series Fix up icc clock rate calculation on some platforms | expand

Message

Konrad Dybcio Aug. 8, 2023, 11:43 a.m. UTC 
Certain platforms require that some buses (or individual nodes) make
some additional changes to the clock rate formula, throwing in some
magic, Qualcomm-defined coefficients, to account for "inefficiencies".

Add the framework for it and utilize it on a couple SoCs.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
Changes in v3:
- Allocate the node bus clock on the stack, as dynamically allocating
  it actually wastes memory on systems with 64-bit pointers..
- Add the node bus clock struct member in the correct patch
- Simplify using coefficients by only checking the node-level ones, and
  setting them equal to the bus-specific ones at probe if absent
- Fix building on arm32
- Mention some references to the related downstream code
- Link to v2: https://lore.kernel.org/r/20230726-topic-icc_coeff-v2-0-8c91c6c76076@linaro.org

Changes in v2:
- Use the (arguably less favourable but necessary for precission) 100/x
  instead of x/100 for ib coefficient, update values in consequent
  patches to reflect that
- Rename "_percent" to "_coeff" because of /\
- Add the necessary code to support per-node clocks
- Add the necessary code to support per-node coefficients
- Hook up the CPUSS<->GNoC clock on QCM2290
- Update EBI node on QCM2290
- Link to v1: https://lore.kernel.org/r/20230726-topic-icc_coeff-v1-0-31616960818c@linaro.org

---
Konrad Dybcio (10):
      interconnect: qcom: icc-rpm: Add AB/IB calculations coefficients
      interconnect: qcom: icc-rpm: Separate out clock rate calulcations
      interconnect: qcom: icc-rpm: Let nodes drive their own bus clock
      interconnect: qcom: icc-rpm: Check for node-specific rate coefficients
      interconnect: qcom: qcm2290: Hook up MAS_APPS_PROC's bus clock
      interconnect: qcom: qcm2290: Set AB coefficients
      interconnect: qcom: qcm2290: Update EBI channel configuration
      interconnect: qcom: sdm660: Set AB/IB coefficients
      interconnect: qcom: msm8996: Set AB/IB coefficients
      clk: qcom: smd-rpm: Move CPUSS_GNoC clock to interconnect

 drivers/clk/qcom/clk-smd-rpm.c             | 16 +++++--
 drivers/interconnect/qcom/icc-rpm-clocks.c |  6 +++
 drivers/interconnect/qcom/icc-rpm.c        | 76 +++++++++++++++++++++++++-----
 drivers/interconnect/qcom/icc-rpm.h        | 15 ++++++
 drivers/interconnect/qcom/msm8996.c        |  8 +++-
 drivers/interconnect/qcom/qcm2290.c        |  9 +++-
 drivers/interconnect/qcom/sdm660.c         |  4 ++
 7 files changed, 115 insertions(+), 19 deletions(-)
---
base-commit: 71cd4fc492ec41e4acd85e98bbf7a13753fc1e03
change-id: 20230726-topic-icc_coeff-b053d5409b9f

Best regards,