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From: Sibi Sankar <sibis@codeaurora.org>
To: robh+dt@kernel.org, andy.gross@linaro.org,
	myungjoo.ham@samsung.com, kyungmin.park@samsung.com,
	rjw@rjwysocki.net, viresh.kumar@linaro.org, nm@ti.com,
	sboyd@kernel.org, georgi.djakov@linaro.org
Cc: bjorn.andersson@linaro.org, david.brown@linaro.org,
	mark.rutland@arm.com, linux-kernel@vger.kernel.org,
	linux-arm-msm-owner@vger.kernel.org, devicetree@vger.kernel.org,
	rnayak@codeaurora.org, cw00.choi@samsung.com,
	linux-pm@vger.kernel.org, evgreen@chromium.org,
	daidavid1@codeaurora.org, dianders@chromium.org,
	Sibi Sankar <sibis@codeaurora.org>
Subject: [PATCH RFC 0/9] Add CPU based scaling support to Passive governor
Date: Thu, 28 Mar 2019 20:58:13 +0530
Message-ID: <20190328152822.532-1-sibis@codeaurora.org> (raw)

This RFC series aims to add cpu based scaling support to the passive
governor and scale DDR with a generic interconnect bandwidth based
devfreq driver on SDM845 SoC. This series achieves similar functionality
to Georgi's Patch series (https://patchwork.kernel.org/cover/10850817/)
and can be used with MSM8916/MSM8996/QCS404 SoCs.

[patches 1,6 - Add and export export helpers to get avg/peak bandwidth and
 update voltage of an disabled opp respectively]

[patch 3 - Adds cpu based scaling support to passive governor]
To achieve this, it listens to CPU frequency transition notifiers
to keep itself up to date on the current CPU frequency.
To decide the frequency of the device, the governor depends one of
the following:
* Constructs a CPU frequency to device frequency mapping table from
  required-opps property of the devfreq device's opp_table
* Scales the device frequency in proportion to the CPU frequency by
  performing interpolation.

[patch 7 - Parses and updates opps from the frequency/voltage read from
 the look up tables]

The patch series depends on opp-bw-MBs bindings introduced in:
https://patchwork.kernel.org/cover/10850817/

Saravana Kannan (2):
  PM / devfreq: Add cpu based scaling support to passive_governor
  PM / devfreq: Add devfreq driver for interconnect bandwidth voting

Sibi Sankar (7):
  OPP: Add and export helpers to get avg/peak bw
  OPP: Export a number of helpers to prevent code duplication
  dt-bindings: devfreq: Add bindings for devfreq dev-icbw driver
  OPP: Add and export helper to update voltage
  cpufreq: qcom: Add support to update cpu node's OPP tables
  arm64: dts: qcom: sdm845: Add cpu OPP tables
  arm64: dts: qcom: sdm845: Add nodes for icbw driver and opp tables

 .../devicetree/bindings/devfreq/icbw.txt      | 146 +++++++++
 arch/arm64/boot/dts/qcom/sdm845.dtsi          | 262 +++++++++++++++++
 drivers/cpufreq/qcom-cpufreq-hw.c             |  29 +-
 drivers/devfreq/Kconfig                       |  19 ++
 drivers/devfreq/Makefile                      |   1 +
 drivers/devfreq/devfreq_icbw.c                | 132 +++++++++
 drivers/devfreq/governor_passive.c            | 276 +++++++++++++++++-
 drivers/opp/core.c                            | 100 +++++++
 drivers/opp/of.c                              |  13 +-
 include/linux/devfreq.h                       |  43 ++-
 include/linux/pm_opp.h                        |  35 +++
 11 files changed, 1044 insertions(+), 12 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/devfreq/icbw.txt
 create mode 100644 drivers/devfreq/devfreq_icbw.c

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


             reply index

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-28 15:28 Sibi Sankar [this message]
2019-03-28 15:28 ` [PATCH RFC 1/9] OPP: Add and export helpers to get avg/peak bw Sibi Sankar
2019-03-28 15:28 ` [PATCH RFC 2/9] OPP: Export a number of helpers to prevent code duplication Sibi Sankar
2019-07-08  3:28   ` Hsin-Yi Wang
2019-07-10  8:01     ` Sibi Sankar
2019-03-28 15:28 ` [PATCH RFC 3/9] PM / devfreq: Add cpu based scaling support to passive_governor Sibi Sankar
2019-04-12  7:39   ` Chanwoo Choi
2019-05-27  8:23     ` Sibi Sankar
2019-05-28  1:27       ` Chanwoo Choi
2019-03-28 15:28 ` [PATCH RFC 4/9] dt-bindings: devfreq: Add bindings for devfreq dev-icbw driver Sibi Sankar
2019-03-28 15:28 ` [PATCH RFC 5/9] PM / devfreq: Add devfreq driver for interconnect bandwidth voting Sibi Sankar
2019-03-28 15:28 ` [PATCH RFC 6/9] OPP: Add and export helper to update voltage Sibi Sankar
2019-04-10 10:24   ` Viresh Kumar
2019-04-10 11:08     ` Sibi Sankar
2019-03-28 15:28 ` [PATCH RFC 7/9] cpufreq: qcom: Add support to update cpu node's OPP tables Sibi Sankar
2019-04-10 10:33   ` Viresh Kumar
2019-04-10 11:16     ` Sibi Sankar
2019-04-10 11:25       ` Viresh Kumar
2019-03-28 15:28 ` [PATCH RFC 8/9] arm64: dts: qcom: sdm845: Add cpu " Sibi Sankar
2019-03-28 15:28 ` [PATCH RFC 9/9] arm64: dts: qcom: sdm845: Add nodes for icbw driver and opp tables Sibi Sankar
2019-04-11  7:02 ` [PATCH RFC 0/9] Add CPU based scaling support to Passive governor Sibi Sankar

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