linux-kernel - [PATCH V5 0/5] PM: domains: Add control for switching back and forth to HW control

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Date: Fri, 15 Mar 2024 16:40:41 +0530
From: Jagadeesh Kona <quic_jkona@...cinc.com>
To: "Rafael J . Wysocki" <rafael@...nel.org>,
        Kevin Hilman
	<khilman@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>, Pavel Machek
	<pavel@....cz>,
        Len Brown <len.brown@...el.com>,
        Greg Kroah-Hartman
	<gregkh@...uxfoundation.org>,
        Bjorn Andersson <andersson@...nel.org>,
        "Konrad
 Dybcio" <konrad.dybcio@...aro.org>,
        Michael Turquette
	<mturquette@...libre.com>,
        Andy Gross <agross@...nel.org>, Stephen Boyd
	<sboyd@...nel.org>,
        Stanimir Varbanov <stanimir.k.varbanov@...il.com>,
        "Vikash Garodia" <quic_vgarodia@...cinc.com>,
        Bryan O'Donoghue
	<bryan.odonoghue@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Abel Vesa
	<abel.vesa@...aro.org>, Taniya Das <quic_tdas@...cinc.com>
CC: <linux-arm-msm@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-media@...r.kernel.org>,
        <linux-pm@...r.kernel.org>, Jagadeesh Kona <quic_jkona@...cinc.com>,
        "Imran
 Shaik" <quic_imrashai@...cinc.com>,
        Ajit Pandey <quic_ajipan@...cinc.com>
Subject: [PATCH V5 0/5] PM: domains: Add control for switching back and forth to HW control

This series adds support for dev_pm_genpd_set_hwmode() and dev_pm_genpd_get_hwmode() APIs
and support in gdsc provider drivers to register respective callbacks and venus consumer
driver example using above API to switch the power domain(GDSC) to HW/SW modes dynamically
at runtime.

Changes in V5:
- Updated 1st patch as per V4 review comments to synchronize the initial HW mode state by
  invoking ->get_hwmode_dev()callback in genpd_add_device()
- With above change, SW cached hwmode will contain correct value initially, and it will be
  updated everytime mode is changed in set_hwmode, hence updated dev_pm_genpd_get_hwmode()
  to just return SW cached hwmode in 1st patch
- Updated commit text for 1st, 3rd, 4th and 5th patches
- Updated 3rd and 5th patches as per review comments received on V4 series
- Added R-By tags received in older series to 1st and 2nd patches

Previous series:
V4: https://lore.kernel.org/all/20240122-gdsc-hwctrl-v4-0-9061e8a7aa07@linaro.org/
V3: https://lore.kernel.org/lkml/20230823114528.3677667-1-abel.vesa@linaro.org/ 
V2: https://lore.kernel.org/lkml/20230816145741.1472721-1-abel.vesa@linaro.org/
V1: https://lore.kernel.org/all/20230628105652.1670316-1-abel.vesa@linaro.org/

Abel Vesa (1):
  PM: domains: Add the domain HW-managed mode to the summary

Jagadeesh Kona (3):
  clk: qcom: gdsc: Add set and get hwmode callbacks to switch GDSC mode
  clk: qcom: Use HW_CTRL_TRIGGER flag to switch video GDSC to HW mode
  venus: pm_helpers: Use dev_pm_genpd_set_hwmode to switch GDSC mode on
    V6

Ulf Hansson (1):
  PM: domains: Allow devices attached to genpd to be managed by HW

 drivers/clk/qcom/gdsc.c                       | 37 +++++++++
 drivers/clk/qcom/gdsc.h                       |  1 +
 drivers/clk/qcom/videocc-sc7280.c             |  2 +-
 drivers/clk/qcom/videocc-sm8250.c             |  4 +-
 .../media/platform/qcom/venus/pm_helpers.c    | 39 ++++++----
 drivers/pmdomain/core.c                       | 78 ++++++++++++++++++-
 include/linux/pm_domain.h                     | 17 ++++
 7 files changed, 157 insertions(+), 21 deletions(-)

-- 
2.43.0