linux-kernel - Re: [PATCH 00/12] Add cpufreq and cci devfreq for mt8183, and SVS support

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Date:   Wed, 20 May 2020 15:24:03 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     "andrew-sh.cheng" <andrew-sh.cheng@...iatek.com>
Cc:     MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Nishanth Menon <nm@...com>, Stephen Boyd <sboyd@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        srv_heupstream@...iatek.com
Subject: Re: [PATCH 00/12] Add cpufreq and cci devfreq for mt8183, and SVS
 support

Hi,

On 5/20/20 2:36 PM, andrew-sh.cheng wrote:
> On Wed, 2020-05-20 at 13:10 +0900, Chanwoo Choi wrote:
>> Hi Andrew,
>>
>> Could you explain the base commit of these patches?
>> When I tried to apply them to v5.7-rc1 for testing,
>> the merge conflict occurs.
>>
>> Thanks,

>> Chanwoo Choi
> 
> Hi Chanwoo Choi,
> 
> My base commit is
> commit 8f3d9f354286745c751374f5f1fcafee6b3f3136
> Author: Linus Torvalds <torvalds@...ux-foundation.org>
> Date:   Sun Apr 12 12:35:55 2020 -0700
> 
>     Linux 5.7-rc1
> 
> Could you show me the conflict error?


When I tried to apply first patch with 'git am',
the merge conflict occurred.

git am \[PATCH\ 01_12\]\ OPP\:\ Allow\ required-opps\ even\ if\ the\ device\ doesn\'t\ have\ power-domains.eml
Applying: OPP: Allow required-opps even if the device doesn't have power-domains
error: patch failed: drivers/opp/core.c:755
error: drivers/opp/core.c: patch does not apply
error: patch failed: drivers/opp/of.c:195																																																																												
error: drivers/opp/of.c: patch does not apply
Patch failed at 0001 OPP: Allow required-opps even if the device doesn't have power-domains
Use 'git am --show-current-patch' to see the failed patch
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

Regards,
Chanwoo Choi

> 
> BR,
> Andrew-sh.Cheng
>>
>> On 5/20/20 12:42 PM, Andrew-sh.Cheng wrote:
>>> MT8183 supports CPU DVFS and CCI DVFS, and LITTLE cpus and CCI are in the same voltage domain.
>>> So, this series is to add drivers to handle the voltage coupling between CPU and CCI DVFS.
>>>
>>> For SVS support, need OPP_EVENT_ADJUST_VOLTAGE and corresponding reaction.
>>>
>>> Change since v5:
>>> 	- Changing dt-binding format to yaml.
>>> 	- Extending current devfreq passive_governor instead of create a new one.
>>> 	- Resend depending patches of Sravana Kannan base on kernel-5.7
>>>
>>>
>>> Andrew-sh.Cheng (6):
>>>   cpufreq: mediatek: add clock and regulator enable for intermediate
>>>     clock
>>>   dt-bindings: devfreq: add compatible for mt8183 cci devfreq
>>>   devfreq: add mediatek cci devfreq
>>>   opp: Modify opp API, dev_pm_opp_get_freq(), find freq in opp, even it
>>>     is disabled
>>>   cpufreq: mediatek: add opp notification for SVS support
>>>   devfreq: mediatek: cci devfreq register opp notification for SVS
>>>     support
>>>
>>> Saravana Kannan (6):
>>>   OPP: Allow required-opps even if the device doesn't have power-domains
>>>   OPP: Add function to look up required OPP's for a given OPP
>>>   OPP: Improve required-opps linking
>>>   PM / devfreq: Cache OPP table reference in devfreq
>>>   PM / devfreq: Add required OPPs support to passive governor
>>>   PM / devfreq: Add cpu based scaling support to passive_governor
>>>
>>>  .../devicetree/bindings/devfreq/mt8183-cci.yaml    |  51 ++++
>>>  drivers/cpufreq/mediatek-cpufreq.c                 | 122 ++++++++-
>>>  drivers/devfreq/Kconfig                            |  12 +
>>>  drivers/devfreq/Makefile                           |   1 +
>>>  drivers/devfreq/devfreq.c                          |   6 +
>>>  drivers/devfreq/governor_passive.c                 | 298 +++++++++++++++++++--
>>>  drivers/devfreq/mt8183-cci-devfreq.c               | 233 ++++++++++++++++
>>>  drivers/opp/core.c                                 |  85 +++++-
>>>  drivers/opp/of.c                                   | 108 ++++----
>>>  drivers/opp/opp.h                                  |   5 +
>>>  include/linux/devfreq.h                            |  42 ++-
>>>  include/linux/pm_opp.h                             |  11 +
>>>  12 files changed, 874 insertions(+), 100 deletions(-)
>>>  create mode 100644 Documentation/devicetree/bindings/devfreq/mt8183-cci.yaml
>>>  create mode 100644 drivers/devfreq/mt8183-cci-devfreq.c
>>>
> 


-- 
Best Regards,
Chanwoo Choi
Samsung Electronics