linux-kernel - Re: [PATCH v10 09/19] PM / devfreq: tegra30: Support interconnect and OPPs from device-tree

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Message-ID: <f8f0b254-b5d6-7951-7576-846d8f58cb13@samsung.com>
Date:   Mon, 23 Nov 2020 16:02:17 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     Dmitry Osipenko <digetx@...il.com>,
        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>,
        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>
Cc:     linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v10 09/19] PM / devfreq: tegra30: Support interconnect
 and OPPs from device-tree

Hi Dmitry,

On 11/23/20 9:27 AM, Dmitry Osipenko wrote:
> This patch moves ACTMON driver away from generating OPP table by itself,
> transitioning it to use the table which comes from device-tree. This
> change breaks compatibility with older device-trees and brings support
> for the interconnect framework to the driver. This is a mandatory change
> which needs to be done in order to implement interconnect-based memory
> DVFS, i.e. device-trees need to be updated. Now ACTMON issues a memory
> bandwidth requests using dev_pm_opp_set_bw() instead of driving EMC clock
> rate directly.
> 
> Tested-by: Peter Geis <pgwipeout@...il.com>
> Tested-by: Nicolas Chauvet <kwizart@...il.com>
> Acked-by: Chanwoo Choi <cw00.choi@...sung.com>
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/devfreq/tegra30-devfreq.c | 79 +++++++++++++++----------------
>  1 file changed, 37 insertions(+), 42 deletions(-)
> 

(snip)

When the patches related to icc are merged, I'll merge patch9/10.
Thanks for your work.

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics