linux-kernel - Re: [PATCH 5/5] OPP: Remove custom OPP helper support

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Date:   Mon, 27 Jun 2022 09:10:49 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Keerthy <j-keerthy@...com>, Dave Gerlach <d-gerlach@...com>,
        Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Stephen Boyd <sboyd@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        linux-pm@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        linux-kernel@...r.kernel.org,
        "linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH 5/5] OPP: Remove custom OPP helper support

27.06.2022 09:06, Viresh Kumar пишет:
> Hi Dmitry,
> 
> On 25-06-22, 14:42, Dmitry Osipenko wrote:
>> 31.05.2022 13:10, Viresh Kumar пишет:
>>> The only user of the custom helper is migrated to use
>>> config_regulators() interface. Remove the now unused custom OPP helper
>>> support.
>>>
>>> This cleans up _set_opp() and leaves a single code path to be used by
>>> all users.
> 
>> Unfortunately we can't remove the set_opp_helper(). It's terrible that
>> this function is unused by Tegra 3d driver because it should be used.
>>
>> The patch that supposed to use the devm_pm_opp_register_set_opp_helper()
>> [1] was merged a half year ago and just today I noticed that the merged
>> code doesn't have devm_pm_opp_register_set_opp_helper() [2]. I think
>> Thierry edited my patch before applying it, perhaps there was a merge
>> conflict :/ This needs to be fixed now.
> 
> As the commit log above says, we aren't removing the feature, but just
> changing the interface to cnofig_regulators(). That was the only
> special handling the drivers were required to do earlier as well, for
> which the helper interface was added.
> 

Okay, but Tegra 3d driver doesn't need config_regulators(), it needs
customized set_opp() to set clock rate for both 3d engines.