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Date:   Mon, 30 May 2022 13:22:56 +0530
From:   Viresh Kumar <viresh.kumar@linaro.org>
To:     Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc:     "Rafael J. Wysocki" <rafael@kernel.org>,
        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
Subject: Re: [PATCH 08/31] cpufreq: tegra20: Migrate to
 dev_pm_opp_set_config()
Message-ID: <20220530075256.lpw6bhupejy2dnqi@vireshk-i7>
References: <cover.1653564321.git.viresh.kumar@linaro.org>
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 <793e49ea-aeb0-a47a-9fe8-742a6397bb35@collabora.com>
 <5c0e697e-abca-bcf0-cf68-d9c240d82527@collabora.com>
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On 29-05-22, 19:59, Dmitry Osipenko wrote:
> > Please keep the PTR_ERR_OR_ZERO.

Ahh, sorry about that. Fixed.

> > tegra20-cpufreq tegra20-cpufreq: failed to set OPP config: -1042688000
> 
> With that fixed, now there is another error:
> 
> [    1.761945] cpu cpu0: _of_add_opp_table_v2: no supported OPPs
> [    1.761960] cpu cpu0: OPP table can't be empty

So we failed to find any OPPs which work with the hardware version of
updated with dev_pm_opp_set_config(). I tried to follow the path and
see if there is something wrong here. Failed to find that :(

> I see this on Tegra30, but not on Tegra20. Apparently OPP table
> refcounting is broken on Tegra30 by this patchset. To make it clear,
> there are no error without these OPP patches applied. I may take a
> closer look if will be needed, just ping me.

Yes, it would be very helpful as I don't have the necessary hardware.

-- 
viresh