linux-kernel - Re: [PATCH] drm/rcar-du: Convert drm_atomic_helper

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Message-ID: <CAFqt6zZno+Q6NY6iOXr8utE3W56+Pd5KboqdOKZjj7Z_jBZDuw@mail.gmail.com>
Date:   Thu, 27 Sep 2018 12:04:18 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     Gustavo Padovan <gustavo@...ovan.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        sean@...rly.run, airlied@...ux.ie,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH] drm/rcar-du: Convert drm_atomic_helper_suspend/resume()

On Tue, Sep 18, 2018 at 10:05 PM Souptick Joarder <jrdr.linux@...il.com> wrote:
>
> convert drm_atomic_helper_suspend/resume() to use
> drm_mode_config_helper_suspend/resume().
>
> remove suspend_state field from the rcar_du_device
> structure as it is no more required.
>
> With this conversion, also drm_fbdev_cma_set_suspend_unlocked()
> will left with no consumer. So this function can be removed.
>
> Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>

Laurent, any comment on this patch ??
> ---
>  drivers/gpu/drm/drm_fb_cma_helper.c   | 18 ------------------
>  drivers/gpu/drm/rcar-du/rcar_du_drv.c | 21 ++-------------------
>  drivers/gpu/drm/rcar-du/rcar_du_drv.h |  1 -
>  include/drm/drm_fb_cma_helper.h       |  2 --
>  4 files changed, 2 insertions(+), 40 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c
> index 47e0e2f..96efc88 100644
> --- a/drivers/gpu/drm/drm_fb_cma_helper.c
> +++ b/drivers/gpu/drm/drm_fb_cma_helper.c
> @@ -224,21 +224,3 @@ void drm_fbdev_cma_hotplug_event(struct drm_fbdev_cma *fbdev_cma)
>                 drm_fb_helper_hotplug_event(&fbdev_cma->fb_helper);
>  }
>  EXPORT_SYMBOL_GPL(drm_fbdev_cma_hotplug_event);
> -
> -/**
> - * drm_fbdev_cma_set_suspend_unlocked - wrapper around
> - *                                      drm_fb_helper_set_suspend_unlocked
> - * @fbdev_cma: The drm_fbdev_cma struct, may be NULL
> - * @state: desired state, zero to resume, non-zero to suspend
> - *
> - * Calls drm_fb_helper_set_suspend, which is a wrapper around
> - * fb_set_suspend implemented by fbdev core.
> - */
> -void drm_fbdev_cma_set_suspend_unlocked(struct drm_fbdev_cma *fbdev_cma,
> -                                       bool state)
> -{
> -       if (fbdev_cma)
> -               drm_fb_helper_set_suspend_unlocked(&fbdev_cma->fb_helper,
> -                                                  state);
> -}
> -EXPORT_SYMBOL(drm_fbdev_cma_set_suspend_unlocked);
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> index 02aee6c..288220f 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> @@ -357,32 +357,15 @@ static void rcar_du_lastclose(struct drm_device *dev)
>  static int rcar_du_pm_suspend(struct device *dev)
>  {
>         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
> -       struct drm_atomic_state *state;
>
> -       drm_kms_helper_poll_disable(rcdu->ddev);
> -       drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, true);
> -
> -       state = drm_atomic_helper_suspend(rcdu->ddev);
> -       if (IS_ERR(state)) {
> -               drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, false);
> -               drm_kms_helper_poll_enable(rcdu->ddev);
> -               return PTR_ERR(state);
> -       }
> -
> -       rcdu->suspend_state = state;
> -
> -       return 0;
> +       return drm_mode_config_helper_suspend(rcdu->ddev);
>  }
>
>  static int rcar_du_pm_resume(struct device *dev)
>  {
>         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
>
> -       drm_atomic_helper_resume(rcdu->ddev, rcdu->suspend_state);
> -       drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, false);
> -       drm_kms_helper_poll_enable(rcdu->ddev);
> -
> -       return 0;
> +       return drm_mode_config_helper_resume(rcdu->ddev);
>  }
>  #endif
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> index b3a25e8..ff25c8d 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> @@ -78,7 +78,6 @@ struct rcar_du_device {
>
>         struct drm_device *ddev;
>         struct drm_fbdev_cma *fbdev;
> -       struct drm_atomic_state *suspend_state;
>
>         struct rcar_du_crtc crtcs[RCAR_DU_MAX_CRTCS];
>         unsigned int num_crtcs;
> diff --git a/include/drm/drm_fb_cma_helper.h b/include/drm/drm_fb_cma_helper.h
> index 4a65f0d..8dbbe1e 100644
> --- a/include/drm/drm_fb_cma_helper.h
> +++ b/include/drm/drm_fb_cma_helper.h
> @@ -26,8 +26,6 @@ struct drm_fbdev_cma *drm_fbdev_cma_init(struct drm_device *dev,
>
>  void drm_fbdev_cma_restore_mode(struct drm_fbdev_cma *fbdev_cma);
>  void drm_fbdev_cma_hotplug_event(struct drm_fbdev_cma *fbdev_cma);
> -void drm_fbdev_cma_set_suspend_unlocked(struct drm_fbdev_cma *fbdev_cma,
> -                                       bool state);
>
>  struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuffer *fb,
>         unsigned int plane);
> --
> 1.9.1
>