linux-kernel - Re: [RFC v3 00/10] DDR/L3 Scaling support on SDM845 and SC7180 SoCs

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Message-ID: <78d92969-0219-d140-d788-d1b14e643e90@codeaurora.org>
Date:   Thu, 19 Mar 2020 16:23:32 +0530
From:   Rajendra Nayak <rnayak@...eaurora.org>
To:     Viresh Kumar <viresh.kumar@...aro.org>,
        Sibi Sankar <sibis@...eaurora.org>
Cc:     sboyd@...nel.org, georgi.djakov@...aro.org, saravanak@...gle.com,
        nm@...com, bjorn.andersson@...aro.org, agross@...nel.org,
        david.brown@...aro.org, robh+dt@...nel.org, mark.rutland@....com,
        rjw@...ysocki.net, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, dianders@...omium.org, mka@...omium.org,
        vincent.guittot@...aro.org, amit.kucheria@...aro.org,
        ulf.hansson@...aro.org, linux-kernel-owner@...r.kernel.org
Subject: Re: [RFC v3 00/10] DDR/L3 Scaling support on SDM845 and SC7180 SoCs



On 3/19/2020 3:54 PM, Viresh Kumar wrote:
> On 19-03-20, 15:41, Sibi Sankar wrote:
>> Viresh,
>> Saravana's example does show a device
>> with multiple opp tables but doesn't
>> need multiple opp table support to
>> land though (since it works fine with
>> the current implementation). I am more
>> interested  in understanding your/
>> Stephen's/Saravana's stance on adding
>> multiple opp-table support. Personally
>> I feel its inevitable, since multiple
>> qc drivers using interconnect opp-tables,
>> routinely need vote on multiple paths in
>> a non-trivial manner.
> 
> The OPP core doesn't support multiple OPP tables for a device and I
> don't understand how it will. And so I have been waiting for a reply.

I thought this series indeed is proposing to add that support in OPP core?
a.k.a "[RFC v3 06/10] opp: Allow multiple opp_tables to be mapped to a single device"

> 
>>>
>>> Could you please post a link to the discussion that you are referring to
>>> here?
>>> I looked at a few links posted in the cover letter as dependencies and
>>> it seems
>>> like the discussions are pending for *months* and not weeks but I
>>> might have looked
>>> at the wrong ones.
>>
>> https://lore.kernel.org/lkml/20200114103448.odnvqawnqb3twst5@vireshk-i7/
>>
>> Rajendra,
>> Viresh is referring to ^^ one
> 
> Right, thanks.

These discussions are stalled for over 2 months now waiting on a response from Saravana.
Viresh, whats the way forward here and how long do we plan on waiting for Saravanas response?


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