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From:   Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To:     Souptick Joarder <jrdr.linux@gmail.com>
Cc:     Gustavo Padovan <gustavo@padovan.org>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        sean@poorly.run, airlied@linux.ie, Daniel Vetter <daniel@ffwll.ch>,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
        linux-renesas-soc@vger.kernel.org
Subject: Re: [PATCH] drm/rcar-du: Convert drm_atomic_helper_suspend/resume()
Date:   Fri, 28 Sep 2018 18:05:18 +0300
Message-ID: <1672691.6TUgGLsHUb@avalon>
Organization: Ideas on Board Oy
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Hi Souptick,

Thank you for the patch.

On Thursday, 27 September 2018 09:34:18 EEST Souptick Joarder wrote:
> On Tue, Sep 18, 2018 at 10:05 PM Souptick Joarder 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@gmail.com>
> 
> Laurent, any comment on this patch ??

Sorry for the delay, and thanks for pinging me.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Should I apply this to my tree or do you plan to merge it through drm-misc as 
it touches drm_fb_cma_helper.c ?

> > ---
> > 
> >  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);

-- 
Regards,

Laurent Pinchart