linux-kernel - Re: [GIT PULL] devfreq next for 5.19

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Date:   Wed, 18 May 2022 21:04:17 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Chanwoo Choi <cw00.choi@...sung.com>
Cc:     "Rafael J. Wysocki <rjw@...ysocki.net>" <rjw@...ysocki.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "Chanwoo Choi (chanwoo@...nel.org)" <chanwoo@...nel.org>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        함명주 <myungjoo.ham@...sung.com>
Subject: Re: [GIT PULL] devfreq next for 5.19

On Wed, May 18, 2022 at 4:16 AM Chanwoo Choi <cw00.choi@...sung.com> wrote:
>
> Dear Rafael,
>
> This is devfreq-next pull request for v5.19-rc1. I add detailed description of
> this pull request on the following tag. Please pull devfreq with
> following updates.
> - tag name : devfreq-next-for-5.19
>
> Best Regards,
> Chanwoo Choi
>
>
> The following changes since commit 3123109284176b1532874591f7c81f3837bbdc17:
>
>   Linux 5.18-rc1 (2022-04-03 14:08:21 -0700)
>
> are available in the Git repository at:
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git tags/devfreq-next-for-5.19
>
> for you to fetch changes up to 26984d9d581e5049bd75091d2e789b9cc3ea12e0:
>
>   PM / devfreq: passive: Keep cpufreq_policy for possible cpus (2022-05-17 18:24:39 +0900)
>
> ----------------------------------------------------------------
> Update devfreq next for v5.19
>
> Detailed description for this pull request:
> 1. Update devfreq core
> - Add cpu based scaling support to passive governor. Some device like
> cache might require the dynamic frequency scaling. But, it has very
> tightly to cpu frequency. So that use passive governor to scale
> the frequency according to current cpu frequency.
>
> To decide the frequency of the device, the governor does one of the following:
> : Derives the optimal devfreq device opp from required-opps property of
>   the parent cpu opp_table.
>
> : Scales the device frequency in proportion to the CPU frequency. So, if
>   the CPUs are running at their max frequency, the device runs at its
>   max frequency. If the CPUs are running at their min frequency, the
>   device runs at its min frequency. It is interpolated for frequencies
>   in between.
>
> 2. Update devfreq driver
> - Update rk3399_dmc.c as following:
> : Convert dt-binding document to YAML and deprecate unused properties.
>
> : Use Hz units for the device-tree properties of rk3399_dmc.
>
> : rk3399_dmc is able to set the idle time before changing the dmc clock.
>   Specify idle time parameters by using nano-second unit on dt bidning.
>
> : Add new disable-freq properties to optimize the power-saving feature
>   of rk3399_dmc.
>
> : Disable devfreq-event device on remove() to fix unbalanced
>   enable-disable count.
>
> : Use devm_pm_opp_of_add_table()
>
> : Block PMU (Power-Management Unit) transitions when scaling frequency
>   by ARM Trust Firmware in order to fix the conflict between PMU and DMC
>   (Dynamic Memory Controller).
> ----------------------------------------------------------------
>
> Brian Norris (15):
>       dt-bindings: devfreq: rk3399_dmc: Convert to YAML
>       dt-bindings: devfreq: rk3399_dmc: Deprecate unused/redundant properties
>       dt-bindings: devfreq: rk3399_dmc: Fix Hz units
>       dt-bindings: devfreq: rk3399_dmc: Specify idle params in nanoseconds
>       dt-bindings: devfreq: rk3399_dmc: Add more disable-freq properties
>       PM / devfreq: rk3399_dmc: Drop undocumented ondemand DT props
>       PM / devfreq: rk3399_dmc: Drop excess timing properties
>       PM / devfreq: rk3399_dmc: Use bitfield macro definitions for ODT_PD
>       PM / devfreq: rk3399_dmc: Support new disable-freq properties
>       PM / devfreq: rk3399_dmc: Support new *-ns properties
>       PM / devfreq: rk3399_dmc: Disable edev on remove()
>       PM / devfreq: rk3399_dmc: Use devm_pm_opp_of_add_table()
>       PM / devfreq: rk3399_dmc: Avoid static (reused) profile
>       soc: rockchip: power-domain: Manage resource conflicts with firmware
>       PM / devfreq: rk3399_dmc: Block PMU during transitions
>
> Chanwoo Choi (3):
>       PM / devfreq: Export devfreq_get_freq_range symbol within devfreq
>       PM / devfreq: passive: Reduce duplicate code when passive_devfreq case
>       PM / devfreq: passive: Keep cpufreq_policy for possible cpus
>
> Saravana Kannan (1):
>       PM / devfreq: Add cpu based scaling support to passive governor
>
>  .../devicetree/bindings/devfreq/rk3399_dmc.txt     | 212 -----------
>  .../memory-controllers/rockchip,rk3399-dmc.yaml    | 384 ++++++++++++++++++++
>  drivers/devfreq/devfreq.c                          |  20 +-
>  drivers/devfreq/governor.h                         |  27 ++
>  drivers/devfreq/governor_passive.c                 | 403 +++++++++++++++++----
>  drivers/devfreq/rk3399_dmc.c                       | 312 ++++++++--------
>  drivers/soc/rockchip/pm_domains.c                  | 118 ++++++
>  include/linux/devfreq.h                            |  17 +-
>  include/soc/rockchip/pm_domains.h                  |  25 ++
>  9 files changed, 1063 insertions(+), 455 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt
>  create mode 100644 Documentation/devicetree/bindings/memory-controllers/rockchip,rk3399-dmc.yaml
>  create mode 100644 include/soc/rockchip/pm_domains.h

Pulled, thanks!