linux-kernel - Re: [PATCH 07/15] clk: qcom: gpucc-sm6115: Add runtime PM

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Date:   Wed, 9 Aug 2023 19:20:44 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Johan Hovold <johan@...nel.org>
Cc:     Bjorn Andersson <andersson@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 07/15] clk: qcom: gpucc-sm6115: Add runtime PM

On 18.07.2023 15:28, Konrad Dybcio wrote:
> On 18.07.2023 15:24, Johan Hovold wrote:
>> On Mon, Jul 17, 2023 at 05:19:14PM +0200, Konrad Dybcio wrote:
>>> The GPU_CC block on SM6115 is powered by the VDD_CX rail. We need to
>>> ensure that it's enabled to prevent unwanted power collapse.
>>
>> This bit is not correct, the power domain would not have been disabled
>> until you enable runtime PM as part of this very patch.
> Right, this was a bit of a thought-jump. The part that ensures there's
> any vote at all is actually the DT commit adding a reference to the
> genpd.
Well I read it again and I think my original intention was "it = the power
domain" and not "it = runtime PM", it makes sense that way..

Anyway, I'll rephrase that to make it less ambiguous.

Konrad