linux-kernel - Re: [PATCH v10 00/19] Introduce memory interconnect for NVIDIA Tegra SoCs

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Date:   Mon, 23 Nov 2020 15:13:57 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Georgi Djakov <georgi.djakov@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Mikko Perttunen <cyndis@...si.fi>,
        Viresh Kumar <vireshk@...nel.org>,
        Peter Geis <pgwipeout@...il.com>,
        Nicolas Chauvet <kwizart@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v10 00/19] Introduce memory interconnect for NVIDIA Tegra
 SoCs

23.11.2020 09:17, Viresh Kumar пишет:
> On 23-11-20, 03:27, Dmitry Osipenko wrote:
>> This series brings initial support for memory interconnect to Tegra20,
>> Tegra30 and Tegra124 SoCs.
>>
>> For the starter only display controllers and devfreq devices are getting
>> interconnect API support, others could be supported later on. The display
>> controllers have the biggest demand for interconnect API right now because
>> dynamic memory frequency scaling can't be done safely without taking into
>> account bandwidth requirement from the displays. In particular this series
>> fixes distorted display output on T30 Ouya and T124 TK1 devices.
>>
>> Changelog:
>>
>> v10 - In a longer run it will be much nicer if we could support EMC
>>       hardware versioning on Tegra20 and it's not late to support it now.
>>       Hence I added these new patches:
>>
>>         dt-bindings: memory: tegra20: emc: Document opp-supported-hw property
>>         memory: tegra20: Support hardware versioning and clean up OPP table initialization
>>
>>     - Removed error message from tegra30-devfreq driver about missing OPP
>>       properties in a device-tree because EMC driver already prints that
>>       message and it uses OPP API error code instead of checking DT directly,
>>       which is a more correct way of doing that.
> 
> Looks good to me (from OPP APIs usage perspective). Thanks for
> continuing with this and fixing all the issues Dmitry.
> 

Hello Viresh,

Thank you for all the clarifications and for reviewing of the patches!