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Date:   Mon, 27 Jun 2022 10:14:24 +0300
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Subject: Re: [PATCH 22/31] soc/tegra: Migrate to dev_pm_opp_set_config()
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To:     Viresh Kumar <viresh.kumar@linaro.org>
Cc:     Thierry Reding <thierry.reding@gmail.com>,
        Jonathan Hunter <jonathanh@nvidia.com>,
        linux-pm@vger.kernel.org,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Rafael Wysocki <rjw@rjwysocki.net>,
        Stephen Boyd <sboyd@kernel.org>, Nishanth Menon <nm@ti.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org
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27.06.2022 09:45, Viresh Kumar пишет:
>> Looks okay. If you'll solve the cpufreq problem where OPP config is set
>> by two drivers for the same cpu device
> This is supported, there is some early freeing of resources on the
> removal path though, the reasoning for which I already gave in another
> email. Though, I am open to sorting that out as well, but nothing
> breaks the code for now AFAICT.
> 

In case of Tegra, we use tegra-cpufreq driver that sets supported_hw and
registers cpufreq-dt. If cpufreq-dt driver defers the probe, then the
supported_hw will be lost on the re-probe. I haven't checked yet, but I
suppose that cpufreq-dt driver defers on Tegra30 because of the CPU
regulator and that's why we get the "OPP table is missing" error.