linux-kernel - Re: [PATCH v8 10/10] soc: qcom: rpmhpd: Mark mx as a parent for cx

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Message-ID: <CAPDyKFqFW-UmdBf00Rt5F=40QBys98f6WLRKMzYXGpiLYhwW4A@mail.gmail.com>
Date:   Fri, 21 Dec 2018 11:33:03 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Rajendra Nayak <rnayak@...eaurora.org>
Cc:     Andy Gross <andy.gross@...aro.org>, Rob Herring <robh@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Stephen Boyd <sboyd@...nel.org>,
        David Collins <collinsd@...eaurora.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        DTML <devicetree@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8 10/10] soc: qcom: rpmhpd: Mark mx as a parent for cx

On Fri, 21 Dec 2018 at 09:57, Rajendra Nayak <rnayak@...eaurora.org> wrote:
>
> Specify the active + sleep and active-only MX power domains as
> the parents of the corresponding CX power domains. This will ensure that
> performance state requests on CX automatically generate equivalent requests
> on MX power domains.
>
> This is used to enforce a requirement that exists for various
> hardware blocks on SDM845 that MX performance state >= CX performance
> state for a given operating frequency.
>
> Signed-off-by: Rajendra Nayak <rnayak@...eaurora.org>
> Acked-by: Viresh Kumar <viresh.kumar@...aro.org>
> Reviewed-by: Stephen Boyd <swboyd@...omium.org>

Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>

Kind regards
Uffe

> ---
>  drivers/soc/qcom/rpmhpd.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
>
> diff --git a/drivers/soc/qcom/rpmhpd.c b/drivers/soc/qcom/rpmhpd.c
> index f7fbe57f31ae..71d693c31e3b 100644
> --- a/drivers/soc/qcom/rpmhpd.c
> +++ b/drivers/soc/qcom/rpmhpd.c
> @@ -97,12 +97,14 @@ static struct rpmhpd sdm845_cx_ao;
>  static struct rpmhpd sdm845_cx = {
>         .pd = { .name = "cx", },
>         .peer = &sdm845_cx_ao,
> +       .parent = &sdm845_mx.pd,
>         .res_name = "cx.lvl",
>  };
>
>  static struct rpmhpd sdm845_cx_ao = {
>         .pd = { .name = "cx_ao", },
>         .peer = &sdm845_cx,
> +       .parent = &sdm845_mx_ao.pd,
>         .res_name = "cx.lvl",
>  };
>
> @@ -372,6 +374,15 @@ static int rpmhpd_probe(struct platform_device *pdev)
>                 data->domains[i] = &rpmhpds[i]->pd;
>         }
>
> +       /* Add subdomains */
> +       for (i = 0; i < num_pds; i++) {
> +               if (!rpmhpds[i])
> +                       continue;
> +               if (rpmhpds[i]->parent)
> +                       pm_genpd_add_subdomain(rpmhpds[i]->parent,
> +                                              &rpmhpds[i]->pd);
> +       }
> +
>         return of_genpd_add_provider_onecell(pdev->dev.of_node, data);
>  }
>
> --
> QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
> of Code Aurora Forum, hosted by The Linux Foundation
>