linux-kernel - Re: [PATCH 1/2] interconnect: qcom: rpmh: add optional mask to send as vote

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Message-ID: <CAA8EJpoUo+8==4bOfv-V8fD6Wmng8GON4XMVWR4DkNtekMbtLA@mail.gmail.com>
Date:   Mon, 19 Jun 2023 15:59:55 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     neil.armstrong@...aro.org
Cc:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Georgi Djakov <djakov@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] interconnect: qcom: rpmh: add optional mask to send
 as vote

On Mon, 19 Jun 2023 at 12:47, Neil Armstrong <neil.armstrong@...aro.org> wrote:
>
> Hi,
>
> On 19/06/2023 11:45, Konrad Dybcio wrote:
> > On 19.06.2023 10:24, Neil Armstrong wrote:
> >> On the SM8550 SoC, some nodes requires a specific bit mark
> >> instead of a bandwidth when voting.
> >>
> >> Add an enable_mask variable to be used to vote when a node
> >> is enabled in an aggregate loop.
> >>
> >> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> >> ---
> > Would be nice to mention that it's literally this commit:
> >
> > https://git.codelinaro.org/clo/la/kernel/msm-5.15/-/commit/2d1573e0206998151b342e6b52a4c0f7234d7e36
>
> Good catch, I just copied the bits but yeah in fine it's the same...

And probably it also requires copying SoB (and Author?) from the
original commit.

>
> I'll refer to it in a v2.
>
> >
> > For the code:
> >
> > Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
>
> Thanks,
> Neil
>
> >
> > Konrad
> >>   drivers/interconnect/qcom/bcm-voter.c | 5 +++++
> >>   drivers/interconnect/qcom/icc-rpmh.h  | 2 ++
> >>   2 files changed, 7 insertions(+)
> >>
> >> diff --git a/drivers/interconnect/qcom/bcm-voter.c b/drivers/interconnect/qcom/bcm-voter.c
> >> index 8f385f9c2dd3..d5f2a6b5376b 100644
> >> --- a/drivers/interconnect/qcom/bcm-voter.c
> >> +++ b/drivers/interconnect/qcom/bcm-voter.c
> >> @@ -83,6 +83,11 @@ static void bcm_aggregate(struct qcom_icc_bcm *bcm)
> >>
> >>              temp = agg_peak[bucket] * bcm->vote_scale;
> >>              bcm->vote_y[bucket] = bcm_div(temp, bcm->aux_data.unit);
> >> +
> >> +            if (bcm->enable_mask && (bcm->vote_x[bucket] || bcm->vote_y[bucket])) {
> >> +                    bcm->vote_x[bucket] = 0;
> >> +                    bcm->vote_y[bucket] = bcm->enable_mask;
> >> +            }
> >>      }
> >>
> >>      if (bcm->keepalive && bcm->vote_x[QCOM_ICC_BUCKET_AMC] == 0 &&
> >> diff --git a/drivers/interconnect/qcom/icc-rpmh.h b/drivers/interconnect/qcom/icc-rpmh.h
> >> index 04391c1ba465..7843d8864d6b 100644
> >> --- a/drivers/interconnect/qcom/icc-rpmh.h
> >> +++ b/drivers/interconnect/qcom/icc-rpmh.h
> >> @@ -81,6 +81,7 @@ struct qcom_icc_node {
> >>    * @vote_x: aggregated threshold values, represents sum_bw when @type is bw bcm
> >>    * @vote_y: aggregated threshold values, represents peak_bw when @type is bw bcm
> >>    * @vote_scale: scaling factor for vote_x and vote_y
> >> + * @enable_mask: optional mask to send as vote instead of vote_x/vote_y
> >>    * @dirty: flag used to indicate whether the bcm needs to be committed
> >>    * @keepalive: flag used to indicate whether a keepalive is required
> >>    * @aux_data: auxiliary data used when calculating threshold values and
> >> @@ -97,6 +98,7 @@ struct qcom_icc_bcm {
> >>      u64 vote_x[QCOM_ICC_NUM_BUCKETS];
> >>      u64 vote_y[QCOM_ICC_NUM_BUCKETS];
> >>      u64 vote_scale;
> >> +    u32 enable_mask;
> >>      bool dirty;
> >>      bool keepalive;
> >>      struct bcm_db aux_data;
> >>
>


-- 
With best wishes
Dmitry