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Date: Mon, 22 Jan 2024 18:27:48 -0700
From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: Iuliana Prodan <iuliana.prodan@nxp.com>
Cc: Ulf Hansson <ulf.hansson@linaro.org>,
	"Rafael J . Wysocki" <rafael@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Viresh Kumar <viresh.kumar@linaro.org>, linux-pm@vger.kernel.org,
	Sudeep Holla <sudeep.holla@arm.com>,
	Kevin Hilman <khilman@kernel.org>,
	Konrad Dybcio <konrad.dybcio@linaro.org>,
	Bjorn Andersson <andersson@kernel.org>,
	Nikunj Kela <nkela@quicinc.com>,
	Prasad Sodagudi <psodagud@quicinc.com>,
	Stephan Gerhold <stephan@gerhold.net>,
	Ben Horgan <Ben.Horgan@arm.com>, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-remoteproc@vger.kernel.org, linux-media@vger.kernel.org,
	Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Daniel Baluta <daniel.baluta@nxp.com>
Subject: Re: [PATCH v2 3/5] remoteproc: imx_rproc: Convert to
 dev_pm_domain_attach|detach_list()
Message-ID: <Za8WFHxVQZ44fJJn@p14s>
References: <20240105160103.183092-1-ulf.hansson@linaro.org>
 <20240105160103.183092-4-ulf.hansson@linaro.org>
 <87801f3e-b7ce-46ba-9856-1321635a11b5@nxp.com>
 <CANLsYkwtNa_-t0f5rhTh5mtF72urKNyqWk0_qfbBwSCQK_6eOg@mail.gmail.com>
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On Mon, Jan 22, 2024 at 01:02:08PM -0700, Mathieu Poirier wrote:
> On Mon, 22 Jan 2024 at 10:51, Iuliana Prodan <iuliana.prodan@nxp.com> wrote:
> >
> > On 1/5/2024 6:01 PM, Ulf Hansson wrote:
> > > Let's avoid the boilerplate code to manage the multiple PM domain case, by
> > > converting into using dev_pm_domain_attach|detach_list().
> > >
> > > Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> > > Cc: Bjorn Andersson <andersson@kernel.org>
> > > Cc: Shawn Guo <shawnguo@kernel.org>
> > > Cc: Sascha Hauer <s.hauer@pengutronix.de>
> > > Cc: Iuliana Prodan <iuliana.prodan@nxp.com>
> > > Cc: Daniel Baluta <daniel.baluta@nxp.com>
> > > Cc: <linux-remoteproc@vger.kernel.org>
> > > Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> > > ---
> > >
> > > Changes in v2:
> > >       - None.
> > >
> > > Iuliana/Daniel I am ccing you to request help with test/review of this change.
> > > Note that, you will need patch 1/5 in the series too, to be able to test this.
> > >
> > > Kind regards
> > > Ulf Hansson
> >
> > Tested-by: Iuliana Prodan <iuliana.prodan@nxp.com>
> > Reviewed-by: Iuliana Prodan <iuliana.prodan@nxp.com>
> >
> 
> Thanks for the leg-work on this.  I'll pick this up in rc1 later this week.

Looking at the other files in this set, Ulf of perhaps Bjorn should take this
set.

for:

drivers/remoteproc/imx_rproc.c
drivers/remoteproc/imx_dsp_rproc.c

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>

> 
> > Iulia
> >
> > > ---
> > >   drivers/remoteproc/imx_rproc.c | 73 +++++-----------------------------
> > >   1 file changed, 9 insertions(+), 64 deletions(-)
> > >
> > > diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
> > > index 8bb293b9f327..3161f14442bc 100644
> > > --- a/drivers/remoteproc/imx_rproc.c
> > > +++ b/drivers/remoteproc/imx_rproc.c
> > > @@ -92,7 +92,6 @@ struct imx_rproc_mem {
> > >
> > >   static int imx_rproc_xtr_mbox_init(struct rproc *rproc);
> > >   static void imx_rproc_free_mbox(struct rproc *rproc);
> > > -static int imx_rproc_detach_pd(struct rproc *rproc);
> > >
> > >   struct imx_rproc {
> > >       struct device                   *dev;
> > > @@ -113,10 +112,8 @@ struct imx_rproc {
> > >       u32                             rproc_pt;       /* partition id */
> > >       u32                             rsrc_id;        /* resource id */
> > >       u32                             entry;          /* cpu start address */
> > > -     int                             num_pd;
> > >       u32                             core_index;
> > > -     struct device                   **pd_dev;
> > > -     struct device_link              **pd_dev_link;
> > > +     struct dev_pm_domain_list       *pd_list;
> > >   };
> > >
> > >   static const struct imx_rproc_att imx_rproc_att_imx93[] = {
> > > @@ -853,7 +850,7 @@ static void imx_rproc_put_scu(struct rproc *rproc)
> > >               return;
> > >
> > >       if (imx_sc_rm_is_resource_owned(priv->ipc_handle, priv->rsrc_id)) {
> > > -             imx_rproc_detach_pd(rproc);
> > > +             dev_pm_domain_detach_list(priv->pd_list);
> > >               return;
> > >       }
> > >
> > > @@ -880,72 +877,20 @@ static int imx_rproc_partition_notify(struct notifier_block *nb,
> > >   static int imx_rproc_attach_pd(struct imx_rproc *priv)
> > >   {
> > >       struct device *dev = priv->dev;
> > > -     int ret, i;
> > > -
> > > -     /*
> > > -      * If there is only one power-domain entry, the platform driver framework
> > > -      * will handle it, no need handle it in this driver.
> > > -      */
> > > -     priv->num_pd = of_count_phandle_with_args(dev->of_node, "power-domains",
> > > -                                               "#power-domain-cells");
> > > -     if (priv->num_pd <= 1)
> > > -             return 0;
> > > -
> > > -     priv->pd_dev = devm_kmalloc_array(dev, priv->num_pd, sizeof(*priv->pd_dev), GFP_KERNEL);
> > > -     if (!priv->pd_dev)
> > > -             return -ENOMEM;
> > > -
> > > -     priv->pd_dev_link = devm_kmalloc_array(dev, priv->num_pd, sizeof(*priv->pd_dev_link),
> > > -                                            GFP_KERNEL);
> > > -
> > > -     if (!priv->pd_dev_link)
> > > -             return -ENOMEM;
> > > -
> > > -     for (i = 0; i < priv->num_pd; i++) {
> > > -             priv->pd_dev[i] = dev_pm_domain_attach_by_id(dev, i);
> > > -             if (IS_ERR(priv->pd_dev[i])) {
> > > -                     ret = PTR_ERR(priv->pd_dev[i]);
> > > -                     goto detach_pd;
> > > -             }
> > > -
> > > -             priv->pd_dev_link[i] = device_link_add(dev, priv->pd_dev[i], DL_FLAG_STATELESS |
> > > -                                                    DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
> > > -             if (!priv->pd_dev_link[i]) {
> > > -                     dev_pm_domain_detach(priv->pd_dev[i], false);
> > > -                     ret = -EINVAL;
> > > -                     goto detach_pd;
> > > -             }
> > > -     }
> > > -
> > > -     return 0;
> > > -
> > > -detach_pd:
> > > -     while (--i >= 0) {
> > > -             device_link_del(priv->pd_dev_link[i]);
> > > -             dev_pm_domain_detach(priv->pd_dev[i], false);
> > > -     }
> > > -
> > > -     return ret;
> > > -}
> > > -
> > > -static int imx_rproc_detach_pd(struct rproc *rproc)
> > > -{
> > > -     struct imx_rproc *priv = rproc->priv;
> > > -     int i;
> > > +     int ret;
> > > +     struct dev_pm_domain_attach_data pd_data = {
> > > +             .pd_flags = PD_FLAG_DEV_LINK_ON,
> > > +     };
> > >
> > >       /*
> > >        * If there is only one power-domain entry, the platform driver framework
> > >        * will handle it, no need handle it in this driver.
> > >        */
> > > -     if (priv->num_pd <= 1)
> > > +     if (dev->pm_domain)
> > >               return 0;
> > >
> > > -     for (i = 0; i < priv->num_pd; i++) {
> > > -             device_link_del(priv->pd_dev_link[i]);
> > > -             dev_pm_domain_detach(priv->pd_dev[i], false);
> > > -     }
> > > -
> > > -     return 0;
> > > +     ret = dev_pm_domain_attach_list(dev, &pd_data, &priv->pd_list);
> > > +     return ret < 0 ? ret : 0;
> > >   }
> > >
> > >   static int imx_rproc_detect_mode(struct imx_rproc *priv)