[PATCH] Revert "drm/tegra: gr3d: Convert into dev_pm_domain_attach|detach_list()"

[Ulf Hansson]

On Thu, 29 Aug 2024 at 11:09, Thierry Reding <thierry.reding at gmail.com> wrote:
>
> From: Thierry Reding <treding at nvidia.com>
>
> This reverts commit f790b5c09665cab0d51dfcc84832d79d2b1e6c0e. An updated
> version of patch was applied to the PM tree. Sorry for the mixup.
>
> Signed-off-by: Thierry Reding <treding at nvidia.com>

If not too late, feel free to add:

Acked-by: Ulf Hansson <ulf.hansson at linaro.org>

Kind regards
Uffe

> ---
>  drivers/gpu/drm/tegra/gr3d.c | 46 ++++++++++++++++++++++++++----------
>  1 file changed, 33 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/tegra/gr3d.c b/drivers/gpu/drm/tegra/gr3d.c
> index 4de1ea0fc7c0..00c8564520e7 100644
> --- a/drivers/gpu/drm/tegra/gr3d.c
> +++ b/drivers/gpu/drm/tegra/gr3d.c
> @@ -46,7 +46,6 @@ struct gr3d {
>         unsigned int nclocks;
>         struct reset_control_bulk_data resets[RST_GR3D_MAX];
>         unsigned int nresets;
> -       struct dev_pm_domain_list *pd_list;
>
>         DECLARE_BITMAP(addr_regs, GR3D_NUM_REGS);
>  };
> @@ -370,12 +369,18 @@ static int gr3d_power_up_legacy_domain(struct device *dev, const char *name,
>         return 0;
>  }
>
> +static void gr3d_del_link(void *link)
> +{
> +       device_link_del(link);
> +}
> +
>  static int gr3d_init_power(struct device *dev, struct gr3d *gr3d)
>  {
> -       struct dev_pm_domain_attach_data pd_data = {
> -               .pd_names = (const char *[]) { "3d0", "3d1" },
> -               .num_pd_names = 2,
> -       };
> +       static const char * const opp_genpd_names[] = { "3d0", "3d1", NULL };
> +       const u32 link_flags = DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME;
> +       struct device **opp_virt_devs, *pd_dev;
> +       struct device_link *link;
> +       unsigned int i;
>         int err;
>
>         err = of_count_phandle_with_args(dev->of_node, "power-domains",
> @@ -409,10 +414,29 @@ static int gr3d_init_power(struct device *dev, struct gr3d *gr3d)
>         if (dev->pm_domain)
>                 return 0;
>
> -       err = dev_pm_domain_attach_list(dev, &pd_data, &gr3d->pd_list);
> -       if (err < 0)
> +       err = devm_pm_opp_attach_genpd(dev, opp_genpd_names, &opp_virt_devs);
> +       if (err)
>                 return err;
>
> +       for (i = 0; opp_genpd_names[i]; i++) {
> +               pd_dev = opp_virt_devs[i];
> +               if (!pd_dev) {
> +                       dev_err(dev, "failed to get %s power domain\n",
> +                               opp_genpd_names[i]);
> +                       return -EINVAL;
> +               }
> +
> +               link = device_link_add(dev, pd_dev, link_flags);
> +               if (!link) {
> +                       dev_err(dev, "failed to link to %s\n", dev_name(pd_dev));
> +                       return -EINVAL;
> +               }
> +
> +               err = devm_add_action_or_reset(dev, gr3d_del_link, link);
> +               if (err)
> +                       return err;
> +       }
> +
>         return 0;
>  }
>
> @@ -503,13 +527,13 @@ static int gr3d_probe(struct platform_device *pdev)
>
>         err = devm_tegra_core_dev_init_opp_table_common(&pdev->dev);
>         if (err)
> -               goto err;
> +               return err;
>
>         err = host1x_client_register(&gr3d->client.base);
>         if (err < 0) {
>                 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
>                         err);
> -               goto err;
> +               return err;
>         }
>
>         /* initialize address register map */
> @@ -517,9 +541,6 @@ static int gr3d_probe(struct platform_device *pdev)
>                 set_bit(gr3d_addr_regs[i], gr3d->addr_regs);
>
>         return 0;
> -err:
> -       dev_pm_domain_detach_list(gr3d->pd_list);
> -       return err;
>  }
>
>  static void gr3d_remove(struct platform_device *pdev)
> @@ -528,7 +549,6 @@ static void gr3d_remove(struct platform_device *pdev)
>
>         pm_runtime_disable(&pdev->dev);
>         host1x_client_unregister(&gr3d->client.base);
> -       dev_pm_domain_detach_list(gr3d->pd_list);
>  }
>
>  static int __maybe_unused gr3d_runtime_suspend(struct device *dev)
> --
> 2.45.2
>