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Message-ID: <CANLsYkwtNa_-t0f5rhTh5mtF72urKNyqWk0_qfbBwSCQK_6eOg@mail.gmail.com>
Date: Mon, 22 Jan 2024 13:02:08 -0700
From: Mathieu Poirier <mathieu.poirier@...aro.org>
To: Iuliana Prodan <iuliana.prodan@....com>
Cc: Ulf Hansson <ulf.hansson@...aro.org>, "Rafael J . Wysocki" <rafael@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Viresh Kumar <viresh.kumar@...aro.org>,
linux-pm@...r.kernel.org, Sudeep Holla <sudeep.holla@....com>,
Kevin Hilman <khilman@...nel.org>, Konrad Dybcio <konrad.dybcio@...aro.org>,
Bjorn Andersson <andersson@...nel.org>, Nikunj Kela <nkela@...cinc.com>,
Prasad Sodagudi <psodagud@...cinc.com>, Stephan Gerhold <stephan@...hold.net>,
Ben Horgan <Ben.Horgan@....com>, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-remoteproc@...r.kernel.org,
linux-media@...r.kernel.org, Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>, Daniel Baluta <daniel.baluta@....com>
Subject: Re: [PATCH v2 3/5] remoteproc: imx_rproc: Convert to dev_pm_domain_attach|detach_list()
On Mon, 22 Jan 2024 at 10:51, Iuliana Prodan <iuliana.prodan@....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@...aro.org>
> > Cc: Bjorn Andersson <andersson@...nel.org>
> > Cc: Shawn Guo <shawnguo@...nel.org>
> > Cc: Sascha Hauer <s.hauer@...gutronix.de>
> > Cc: Iuliana Prodan <iuliana.prodan@....com>
> > Cc: Daniel Baluta <daniel.baluta@....com>
> > Cc: <linux-remoteproc@...r.kernel.org>
> > Signed-off-by: Ulf Hansson <ulf.hansson@...aro.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@....com>
> Reviewed-by: Iuliana Prodan <iuliana.prodan@....com>
>
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)
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