linux-kernel - Re: [PATCH 0/4] Start using rpmpd for power domains on MSM8974

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Message-ID: <amfgwjgstu4hoxz4lo7fqrqz5fqtf3r7o6wqvrrjkcfubwrjyz@5i75peprq3wn>
Date: Tue, 24 Jun 2025 03:59:08 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Luca Weiss <luca@...aweiss.eu>
Cc: ~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>, linux-arm-msm@...r.kernel.org,
        linux-remoteproc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] Start using rpmpd for power domains on MSM8974

On Sat, Jun 21, 2025 at 03:19:55PM +0200, Luca Weiss wrote:
> Switch over the ADSP PIL to use power-domains instead of a regulator,
> and have one commit switching over the MSM8974 SoC plus all the devices
> to use power-domains.
> 
> Note, that I'm aware that these changes are not backwards compatible and
> not really bisectable, but since it only affects the ADSP on these

Why? The cx-supply is handled unconditionally. A single-domain usecase
is also handled via a special code path. I think this might be
backwards-compatible, by the pure luck.

> pretty old boards, I say it's fine to have this. Get all the patches
> into the same release (6.17?) and then we're good again.
> 
> Signed-off-by: Luca Weiss <luca@...aweiss.eu>
> ---
> Luca Weiss (4):
>       dt-bindings: remoteproc: qcom,adsp: Make msm8974 use CX as power domain
>       remoteproc: qcom_q6v5_pas: Use resource with CX PD for MSM8974
>       ARM: dts: qcom: msm8974: Sort header includes alphabetically
>       ARM: dts: qcom: msm8974: Start using rpmpd for power domains
> 
>  .../devicetree/bindings/remoteproc/qcom,adsp.yaml  | 18 ++------
>  .../arm/boot/dts/qcom/qcom-apq8074-dragonboard.dts | 13 ------
>  .../qcom/qcom-msm8974-lge-nexus5-hammerhead.dts    | 12 ------
>  .../boot/dts/qcom/qcom-msm8974-samsung-hlte.dts    | 12 ------
>  .../dts/qcom/qcom-msm8974-sony-xperia-rhine.dtsi   | 12 ------
>  arch/arm/boot/dts/qcom/qcom-msm8974.dtsi           | 50 ++++++++++++++++++++--
>  .../dts/qcom/qcom-msm8974pro-fairphone-fp2.dts     |  8 ----
>  arch/arm/boot/dts/qcom/qcom-msm8974pro-htc-m8.dts  | 11 -----
>  .../dts/qcom/qcom-msm8974pro-oneplus-bacon.dts     |  9 ----
>  .../qcom/qcom-msm8974pro-samsung-klte-common.dtsi  | 11 ++---
>  ...qcom-msm8974pro-sony-xperia-shinano-common.dtsi | 12 ------
>  drivers/remoteproc/qcom_q6v5_pas.c                 |  2 +-
>  12 files changed, 56 insertions(+), 114 deletions(-)
> ---
> base-commit: 7fa2fb97cd28e1d9670da538095565b6fba83977
> change-id: 20250621-msm8974-rpmpd-switch-b19b166c02be
> 
> Best regards,
> -- 
> Luca Weiss <luca@...aweiss.eu>
> 

-- 
With best wishes
Dmitry