Re: [PATCH v2 3/5] remoteproc: imx_rproc: Convert to dev_pm_domain_attach|detach_list()

[Mathieu Poirier]

On Mon, 22 Jan 2024 at 10:51, Iuliana Prodan <iuliana.prodan@xxxxxxx> 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@xxxxxxxxxx>
> > Cc: Bjorn Andersson <andersson@xxxxxxxxxx>
> > Cc: Shawn Guo <shawnguo@xxxxxxxxxx>
> > Cc: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
> > Cc: Iuliana Prodan <iuliana.prodan@xxxxxxx>
> > Cc: Daniel Baluta <daniel.baluta@xxxxxxx>
> > Cc: <linux-remoteproc@xxxxxxxxxxxxxxx>
> > Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
> > ---
> >
> > 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@xxxxxxx>
> Reviewed-by: Iuliana Prodan <iuliana.prodan@xxxxxxx>
>

Thanks for the leg-work on this.  I'll pick this up in rc1 later this week.

> 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)