linux-kernel - [PATCH v7 0/6] clk: qcom: use power-domain for sm8250's clock controllers

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Message-Id: <20210829154757.784699-1-dmitry.baryshkov@linaro.org>
Date:   Sun, 29 Aug 2021 18:47:49 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Taniya Das <tdas@...eaurora.org>,
        Jonathan Marek <jonathan@...ek.ca>,
        Michael Turquette <mturquette@...libre.com>
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-clk@...r.kernel.org,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Mark Brown <broonie@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v7 0/6] clk: qcom: use power-domain for sm8250's clock controllers

On SM8250 both the display and video clock controllers are powered up by
the MMCX power domain. Handle this by linking clock controllers to the
proper power domain, and using runtime power management to enable and
disable the MMCX power domain.

Dependencies:
https://lore.kernel.org/linux-pm/1628767642-4008-1-git-send-email-rnayak@codeaurora.org/
(pending inclusion into 5.15)

Changes since v6:
 - Dropped dependency on Bjorn's patches
 - Restored required-opps properties
 - Held pm device state while gdsc is powered on, removing dependency on
   genpd's power_on() powering the domain into required state.

Changes since v5:
 - Dropped devm_pm_runtime_enable callback to remove extra dependency

Changes since v4:
 - Dropped pm_runtime handling from drivers/clk/qcom/common.c Moved the
   code into dispcc-sm8250.c and videocc-sm8250.c

Changes since v3:
 - Wrap gdsc_enable/gdsc_disable into pm_runtime_get/put calls rather
   than calling pm_runtime_get in gdsc_enabled and _put in gdsc_disable
 - Squash gdsc patches together to remove possible dependencies between
   two patches.

Changes since v2:
 - Move pm_runtime calls from generic genpd code to the gdsc code for
   now (as suggested by Ulf & Bjorn)

Changes since v1:
 - Rebase on top of Bjorn's patches, removing the need for setting
   performance state directly.
 - Move runtime PM calls from GDSC code to generic genpd code.
 - Always call pm_runtime_enable in the Qualcomm generic clock
   controller code.
 - Register GDSC power domains as subdomains of the domain powering the
   clock controller if there is one.

----------------------------------------------------------------
Dmitry Baryshkov (8):
      dt-bindings: clock: qcom,dispcc-sm8x50: add mmcx power domain
      dt-bindings: clock: qcom,videocc: add mmcx power domain
      clk: qcom: dispcc-sm8250: use runtime PM for the clock controller
      clk: qcom: videocc-sm8250: use runtime PM for the clock controller
      clk: qcom: gdsc: enable optional power domain support
      arm64: dts: qcom: sm8250: remove mmcx regulator
      clk: qcom: dispcc-sm8250: stop using mmcx regulator
      clk: qcom: videocc-sm8250: stop using mmcx regulator

 .../bindings/clock/qcom,dispcc-sm8x50.yaml         | 13 ++++++
 .../devicetree/bindings/clock/qcom,videocc.yaml    | 13 ++++++
 arch/arm64/boot/dts/qcom/sm8250.dtsi               | 13 ++----
 drivers/clk/qcom/dispcc-sm8250.c                   | 28 ++++++++++--
 drivers/clk/qcom/gdsc.c                            | 51 ++++++++++++++++++++--
 drivers/clk/qcom/gdsc.h                            |  2 +
 drivers/clk/qcom/videocc-sm8250.c                  | 31 ++++++++++---
 7 files changed, 130 insertions(+), 21 deletions(-)