linux-kernel - Re: [PATCH v14 00/39] NVIDIA Tegra power management patches for 5.17

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Date:   Wed, 27 Oct 2021 22:42:39 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Viresh Kumar <vireshk@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Mikko Perttunen <mperttunen@...dia.com>,
        Lee Jones <lee.jones@...aro.org>,
        Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
        Nishanth Menon <nm@...com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Michael Turquette <mturquette@...libre.com>,
        linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-pwm@...r.kernel.org,
        linux-mmc@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-clk@...r.kernel.org, David Heidelberg <david@...t.cz>
Subject: Re: [PATCH v14 00/39] NVIDIA Tegra power management patches for 5.17

27.10.2021 19:01, Ulf Hansson пишет:
> On Tue, 26 Oct 2021 at 00:45, Dmitry Osipenko <digetx@...il.com> wrote:
>>
>> This series adds runtime PM support to Tegra drivers and enables core
>> voltage scaling for Tegra20/30 SoCs, resolving overheating troubles.
>>
>> All patches in this series are interdependent and should go via Tegra tree
>> for simplicity.
>>
>> Changelog:
>>
>> v14: - Fixed missing runtime PM syncing on removal of drivers, which was
>>        spotted by Ulf Hansson in v13.
>>
>>      - clk-device driver now resumes RPM on system suspend instead of
>>        preparing clock which it backs. This was suggested by Ulf Hansson.
>>
>>      - clk-device driver now syncs power domain performance unconditionally
>>        during driver's probe time since GENPD API allows to do this now.
>>        It was spotted by Ulf Hansson.
>>
>>      - Added new "Enable runtime PM during OPP state-syncing" patch, which
>>        allows drivers to sync state at any time. Previously drivers were
>>        obligated to take care of enabling RPM at the "right" time.
>>
>>      - Moved runtime PM initialization/uninitialization of DRM drivers that
>>        use host1x channel to host1x client init/deinit phase. I noticed that
>>        there is UAF problem because RPM-suspend callback waits until channel
>>        is idling and channel is already released/freed during driver's removal
>>        phase.
>>
>>      - Added system suspend support to the new NVDEC DRM driver.
>>
>>      - Added missing pm_runtime_mark_last_busy() to DRM driver.
>>
>>      - Corrected VDE GENPD patch which previously made video decoder clock
>>        always-enabled by mistake if legacy PD code path was used. It was
>>        spotted while we were testing VDE on Tegra114 that doesn't support
>>        GENPD yet.
>>
>>      - Added ack from Peter Chen to the USB patch that he gave to v13.
>>
>>      - Changed OPP table names in accordance to the new naming scheme
>>        required by the recent core OPP binding.
>>
>>      - Added 500MHz memory OPP entry used by ASUS Transformer tablets.
> 
> Besides those minor nitpicks/questions that I have sent for patch1 and
> patch29, the series looks good to me!
> 
> Feel free to add, for the whole series:
> 
> Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>

Thank you, Ulf!

I'll wait for more comments and re-spin v15 with minor improvements
around the end of the upcoming merge window.