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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 18:30:35 +0300
Message-ID: <20809880.gF2CxujBy3@avalon>
Organization: Ideas on Board Oy
In-Reply-To: <1672691.6TUgGLsHUb@avalon>
References: <20180918163903.GA11172@jordon-HP-15-Notebook-PC> <CAFqt6zZno+Q6NY6iOXr8utE3W56+Pd5KboqdOKZjj7Z_jBZDuw@mail.gmail.com> <1672691.6TUgGLsHUb@avalon>
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Hi Souptick,

On Friday, 28 September 2018 18:05:18 EEST Laurent Pinchart wrote:
> 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().
> >>=20
> >> remove suspend_state field from the rcar_du_device
> >> structure as it is no more required.
> >>=20
> >> With this conversion, also drm_fbdev_cma_set_suspend_unlocked()
> >> will left with no consumer. So this function can be removed.
> >>=20
> >> Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
> >=20
> > Laurent, any comment on this patch ??
>=20
> Sorry for the delay, and thanks for pinging me.
>=20
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
>=20
> 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 ?

I just realized that the same patch got supplied by Noralf Tr=F8nnes nearly=
 a=20
year ago, and was later superseded by https://patchwork.freedesktop.org/pat=
ch/
247861/. I think we should thus apply Noralf's patches instead (once he sen=
ds=20
v4 out).

> >> ---
> >>=20
> >>  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(-)
> >>=20
> >> 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);
> >>=20
> >> -
> >> -/**
> >> - * 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)
> >> -             =20
> >> 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)
> >>=20
> >>  static int rcar_du_pm_suspend(struct device *dev)
> >>  {
> >>         struct rcar_du_device *rcdu =3D dev_get_drvdata(dev);
> >> -       struct drm_atomic_state *state;
> >>=20
> >> -       drm_kms_helper_poll_disable(rcdu->ddev);
> >> -       drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, true);
> >> -
> >> -       state =3D 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 =3D state;
> >> -
> >> -       return 0;
> >> +       return drm_mode_config_helper_suspend(rcdu->ddev);
> >>  }
> >> =20
> >>  static int rcar_du_pm_resume(struct device *dev)
> >>  {
> >>         struct rcar_du_device *rcdu =3D dev_get_drvdata(dev);
> >>=20
> >> -       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
> >>=20
> >> 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;
> >>=20
> >> -       struct drm_atomic_state *suspend_state;
> >>=20
> >>         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,
> >>=20
> >>  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);
> >>=20
> >>  struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct
> >>  drm_framebuffer *fb,
> >>         unsigned int plane);

=2D-=20
Regards,

Laurent Pinchart