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

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Date:   Mon, 10 Sep 2018 12:16:03 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>, airlied@...ux.ie,
        jonathanh@...dia.com, Ajit Linux <ajitn.linux@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/tegra: Convert drm_atomic_helper_suspend/resume()

On Mon, Aug 6, 2018 at 11:42 AM Souptick Joarder <jrdr.linux@...il.com> wrote:
>
> On Wed, Aug 1, 2018 at 1:37 AM, Souptick Joarder <jrdr.linux@...il.com> wrote:
> > convert drm_atomic_helper_suspend/resume() to use
> > drm_mode_config_helper_suspend/resume().
> >
> > With this conversion, tegra_drm_fb_suspend() and
> > tegra_drm_fb_resume() wil not be used anymore.
> > Both of these functions can be removed.
> >
> > Also, in tegra_drm struct's member state will not be
> > used anymore. So this can be removed forever.
> >
> > Fixed one sparse warning.
> >
> > Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
> > Signed-off-by: Ajit Negi <ajitn.linux@...il.com>
> > ---
>
> Any comment on this patch ?

If no comment, can we get this patch in queue for 4.20 ?
>
> >  drivers/gpu/drm/tegra/drm.c | 20 ++------------------
> >  drivers/gpu/drm/tegra/drm.h |  4 ----
> >  drivers/gpu/drm/tegra/fb.c  | 24 +-----------------------
> >  3 files changed, 3 insertions(+), 45 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
> > index a2bd587..9a0efce 100644
> > --- a/drivers/gpu/drm/tegra/drm.c
> > +++ b/drivers/gpu/drm/tegra/drm.c
> > @@ -1212,31 +1212,15 @@ static int host1x_drm_remove(struct host1x_device *dev)
> >  static int host1x_drm_suspend(struct device *dev)
> >  {
> >         struct drm_device *drm = dev_get_drvdata(dev);
> > -       struct tegra_drm *tegra = drm->dev_private;
> > -
> > -       drm_kms_helper_poll_disable(drm);
> > -       tegra_drm_fb_suspend(drm);
> > -
> > -       tegra->state = drm_atomic_helper_suspend(drm);
> > -       if (IS_ERR(tegra->state)) {
> > -               tegra_drm_fb_resume(drm);
> > -               drm_kms_helper_poll_enable(drm);
> > -               return PTR_ERR(tegra->state);
> > -       }
> >
> > -       return 0;
> > +       return drm_mode_config_helper_suspend(drm);
> >  }
> >
> >  static int host1x_drm_resume(struct device *dev)
> >  {
> >         struct drm_device *drm = dev_get_drvdata(dev);
> > -       struct tegra_drm *tegra = drm->dev_private;
> >
> > -       drm_atomic_helper_resume(drm, tegra->state);
> > -       tegra_drm_fb_resume(drm);
> > -       drm_kms_helper_poll_enable(drm);
> > -
> > -       return 0;
> > +       return drm_mode_config_helper_resume(drm);
> >  }
> >  #endif
> >
> > diff --git a/drivers/gpu/drm/tegra/drm.h b/drivers/gpu/drm/tegra/drm.h
> > index 92d2487..1012335 100644
> > --- a/drivers/gpu/drm/tegra/drm.h
> > +++ b/drivers/gpu/drm/tegra/drm.h
> > @@ -60,8 +60,6 @@ struct tegra_drm {
> >         unsigned int pitch_align;
> >
> >         struct tegra_display_hub *hub;
> > -
> > -       struct drm_atomic_state *state;
> >  };
> >
> >  struct tegra_drm_client;
> > @@ -186,8 +184,6 @@ struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
> >  void tegra_drm_fb_free(struct drm_device *drm);
> >  int tegra_drm_fb_init(struct drm_device *drm);
> >  void tegra_drm_fb_exit(struct drm_device *drm);
> > -void tegra_drm_fb_suspend(struct drm_device *drm);
> > -void tegra_drm_fb_resume(struct drm_device *drm);
> >
> >  extern struct platform_driver tegra_display_hub_driver;
> >  extern struct platform_driver tegra_dc_driver;
> > diff --git a/drivers/gpu/drm/tegra/fb.c b/drivers/gpu/drm/tegra/fb.c
> > index 4c22cdd..b947e82 100644
> > --- a/drivers/gpu/drm/tegra/fb.c
> > +++ b/drivers/gpu/drm/tegra/fb.c
> > @@ -356,7 +356,7 @@ static void tegra_fbdev_exit(struct tegra_fbdev *fbdev)
> >                 /* Undo the special mapping we made in fbdev probe. */
> >                 if (bo && bo->pages) {
> >                         vunmap(bo->vaddr);
> > -                       bo->vaddr = 0;
> > +                       bo->vaddr = NULL;
> >                 }
> >
> >                 drm_framebuffer_remove(fbdev->fb);
> > @@ -412,25 +412,3 @@ void tegra_drm_fb_exit(struct drm_device *drm)
> >         tegra_fbdev_exit(tegra->fbdev);
> >  #endif
> >  }
> > -
> > -void tegra_drm_fb_suspend(struct drm_device *drm)
> > -{
> > -#ifdef CONFIG_DRM_FBDEV_EMULATION
> > -       struct tegra_drm *tegra = drm->dev_private;
> > -
> > -       console_lock();
> > -       drm_fb_helper_set_suspend(&tegra->fbdev->base, 1);
> > -       console_unlock();
> > -#endif
> > -}
> > -
> > -void tegra_drm_fb_resume(struct drm_device *drm)
> > -{
> > -#ifdef CONFIG_DRM_FBDEV_EMULATION
> > -       struct tegra_drm *tegra = drm->dev_private;
> > -
> > -       console_lock();
> > -       drm_fb_helper_set_suspend(&tegra->fbdev->base, 0);
> > -       console_unlock();
> > -#endif
> > -}
> > --
> > 1.9.1
> >