linux-kernel - Re: [PATCH 4/4] ARM: dts: qcom: msm8974: Start using rpmpd for power domains

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Message-ID: <50b0aa77-4ec5-412f-9ce5-6ec613dd0afb@oss.qualcomm.com>
Date: Mon, 23 Jun 2025 14:39:34 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Luca Weiss <luca@...aweiss.eu>, ~postmarketos/upstreaming@...ts.sr.ht,
        phone-devel@...r.kernel.org, Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] ARM: dts: qcom: msm8974: Start using rpmpd for power
 domains

On 6/21/25 3:19 PM, Luca Weiss wrote:
> Due to historical reasons all msm8974 boards have used the CX power rail
> as regulator instead of going through the power domain framework.
> 
> Since rpmpd has gained msm8974 support quite a bit ago, let's start
> using it and replace all usages of pm8841_s2 (CX), pm8841_s4 (GFX) and
> for the boards using pma8084 pma8084_s2 (CX), pma8084_s7 (GFX).
> 
> For reference, downstream is using GFX power rail as parent-supply for
> mmcc's OXILI_GDSC GDSC which then is used for GPU, but nothing there is
> modelled upstream.

if you use an opp table with described rpmpd levels and bind the GFX
domain to gpucc, it should propagate - check it out

> 
> Signed-off-by: Luca Weiss <luca@...aweiss.eu>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Konrad