linux-kernel - Re: [PATCH 16/28] drm: i915: Call cpu_latency_qos_*() instead of pm_qos

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Date:   Wed, 12 Feb 2020 11:32:39 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     intel-gfx <intel-gfx@...ts.freedesktop.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Amit Kucheria <amit.kucheria@...aro.org>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Linux PM <linux-pm@...r.kernel.org>
Subject: Re: [PATCH 16/28] drm: i915: Call cpu_latency_qos_*() instead of pm_qos_*()

On Wed, Feb 12, 2020 at 12:40 AM Rafael J. Wysocki <rjw@...ysocki.net> wrote:
>
> From: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
>
> Call cpu_latency_qos_add/update/remove_request() instead of
> pm_qos_add/update/remove_request(), respectively, because the
> latter are going to be dropped.
>
> No intentional functional impact.
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Please note that the whole series is available here:

https://lore.kernel.org/linux-pm/1654227.8mz0SueHsU@kreacher/

> ---
>  drivers/gpu/drm/i915/display/intel_dp.c |  4 ++--
>  drivers/gpu/drm/i915/i915_drv.c         | 12 +++++-------
>  drivers/gpu/drm/i915/intel_sideband.c   |  5 +++--
>  3 files changed, 10 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index c7424e2a04a3..208457005a11 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -1360,7 +1360,7 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
>          * lowest possible wakeup latency and so prevent the cpu from going into
>          * deep sleep states.
>          */
> -       pm_qos_update_request(&i915->pm_qos, 0);
> +       cpu_latency_qos_update_request(&i915->pm_qos, 0);
>
>         intel_dp_check_edp(intel_dp);
>
> @@ -1488,7 +1488,7 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
>
>         ret = recv_bytes;
>  out:
> -       pm_qos_update_request(&i915->pm_qos, PM_QOS_DEFAULT_VALUE);
> +       cpu_latency_qos_update_request(&i915->pm_qos, PM_QOS_DEFAULT_VALUE);
>
>         if (vdd)
>                 edp_panel_vdd_off(intel_dp, false);
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index f7385abdd74b..74481a189cfc 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -502,8 +502,7 @@ static int i915_driver_early_probe(struct drm_i915_private *dev_priv)
>         mutex_init(&dev_priv->backlight_lock);
>
>         mutex_init(&dev_priv->sb_lock);
> -       pm_qos_add_request(&dev_priv->sb_qos,
> -                          PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE);
> +       cpu_latency_qos_add_request(&dev_priv->sb_qos, PM_QOS_DEFAULT_VALUE);
>
>         mutex_init(&dev_priv->av_mutex);
>         mutex_init(&dev_priv->wm.wm_mutex);
> @@ -568,7 +567,7 @@ static void i915_driver_late_release(struct drm_i915_private *dev_priv)
>         vlv_free_s0ix_state(dev_priv);
>         i915_workqueues_cleanup(dev_priv);
>
> -       pm_qos_remove_request(&dev_priv->sb_qos);
> +       cpu_latency_qos_remove_request(&dev_priv->sb_qos);
>         mutex_destroy(&dev_priv->sb_lock);
>  }
>
> @@ -1226,8 +1225,7 @@ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv)
>                 }
>         }
>
> -       pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY,
> -                          PM_QOS_DEFAULT_VALUE);
> +       cpu_latency_qos_add_request(&dev_priv->pm_qos, PM_QOS_DEFAULT_VALUE);
>
>         intel_gt_init_workarounds(dev_priv);
>
> @@ -1273,7 +1271,7 @@ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv)
>  err_msi:
>         if (pdev->msi_enabled)
>                 pci_disable_msi(pdev);
> -       pm_qos_remove_request(&dev_priv->pm_qos);
> +       cpu_latency_qos_remove_request(&dev_priv->pm_qos);
>  err_mem_regions:
>         intel_memory_regions_driver_release(dev_priv);
>  err_ggtt:
> @@ -1296,7 +1294,7 @@ static void i915_driver_hw_remove(struct drm_i915_private *dev_priv)
>         if (pdev->msi_enabled)
>                 pci_disable_msi(pdev);
>
> -       pm_qos_remove_request(&dev_priv->pm_qos);
> +       cpu_latency_qos_remove_request(&dev_priv->pm_qos);
>  }
>
>  /**
> diff --git a/drivers/gpu/drm/i915/intel_sideband.c b/drivers/gpu/drm/i915/intel_sideband.c
> index cbfb7171d62d..0648eda309e4 100644
> --- a/drivers/gpu/drm/i915/intel_sideband.c
> +++ b/drivers/gpu/drm/i915/intel_sideband.c
> @@ -60,7 +60,7 @@ static void __vlv_punit_get(struct drm_i915_private *i915)
>          * to the Valleyview P-unit and not all sideband communications.
>          */
>         if (IS_VALLEYVIEW(i915)) {
> -               pm_qos_update_request(&i915->sb_qos, 0);
> +               cpu_latency_qos_update_request(&i915->sb_qos, 0);
>                 on_each_cpu(ping, NULL, 1);
>         }
>  }
> @@ -68,7 +68,8 @@ static void __vlv_punit_get(struct drm_i915_private *i915)
>  static void __vlv_punit_put(struct drm_i915_private *i915)
>  {
>         if (IS_VALLEYVIEW(i915))
> -               pm_qos_update_request(&i915->sb_qos, PM_QOS_DEFAULT_VALUE);
> +               cpu_latency_qos_update_request(&i915->sb_qos,
> +                                              PM_QOS_DEFAULT_VALUE);
>
>         iosf_mbi_punit_release();
>  }
> --
> 2.16.4
>
>
>
>
>