Re: [PATCH v4 05/23] interconnect: icc-clk: add support for scaling using OPP

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On Mon, 28 Aug 2023 at 21:10, Stephen Boyd <sboyd@xxxxxxxxxx> wrote:
>
> Quoting Dmitry Baryshkov (2023-08-27 04:50:15)
> > diff --git a/drivers/interconnect/icc-clk.c b/drivers/interconnect/icc-clk.c
> > index d787f2ea36d9..45ffb068979d 100644
> > --- a/drivers/interconnect/icc-clk.c
> > +++ b/drivers/interconnect/icc-clk.c
> > @@ -25,12 +28,16 @@ struct icc_clk_provider {
> >  static int icc_clk_set(struct icc_node *src, struct icc_node *dst)
> >  {
> >         struct icc_clk_node *qn = src->data;
> > +       unsigned long rate = icc_units_to_bps(src->peak_bw);
> >         int ret;
> >
> >         if (!qn || !qn->clk)
> >                 return 0;
> >
> > -       if (!src->peak_bw) {
> > +       if (qn->opp)
> > +               return dev_pm_opp_set_rate(qn->dev, rate);
>
> Just curious how does lockdep do with this? Doesn't OPP call into
> interconnect code, so lockdep will complain about ABBA?

Interesting question. I should check it.

-- 
With best wishes
Dmitry



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