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From:   Benjamin Gaignard <benjamin.gaignard@linaro.org>
Date:   Thu, 20 Jun 2019 17:05:32 +0200
Message-ID: <CA+M3ks7oNuNnH+0eD5TDLFR_0fFWYA4gGtf40HcbFK4SQ7O-EQ@mail.gmail.com>
Subject: Re: [PATCH 1/3] drm/stm: drv: fix suspend/resume
To:     Philippe CORNU <philippe.cornu@st.com>
Cc:     Yannick FERTRE <yannick.fertre@st.com>,
        Benjamin GAIGNARD <benjamin.gaignard@st.com>,
        Vincent ABRIOU <vincent.abriou@st.com>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        Alexandre TORGUE <alexandre.torgue@st.com>,
        "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>,
        "linux-stm32@st-md-mailman.stormreply.com" 
        <linux-stm32@st-md-mailman.stormreply.com>,
        "linux-arm-kernel@lists.infradead.org" 
        <linux-arm-kernel@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
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Le mar. 18 juin 2019 =C3=A0 11:57, Philippe CORNU <philippe.cornu@st.com> a=
 =C3=A9crit :
>
> Hi Yannick,
>
> Thank you for your patch.
>
> Acked-by: Philippe Cornu <philippe.cornu@st.com>

I have corrected Fixes sha1 (should be 12 digits)
Applied on drm-misc-next.

Benjamin

>
> Philippe :-)
>
> On 6/17/19 9:18 AM, Yannick Fertr=C3=A9 wrote:
> > Without this fix, the system can not go in "suspend" mode
> > due to an error in drv_suspend function.
> >
> > Fixes: 35ab6cf ("drm/stm: support runtime power management")
> >
> > Signed-off-by: Yannick Fertr=C3=A9 <yannick.fertre@st.com>
> > ---
> >   drivers/gpu/drm/stm/drv.c | 15 ++++++++-------
> >   1 file changed, 8 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/stm/drv.c b/drivers/gpu/drm/stm/drv.c
> > index 5659572..9dee4e4 100644
> > --- a/drivers/gpu/drm/stm/drv.c
> > +++ b/drivers/gpu/drm/stm/drv.c
> > @@ -136,8 +136,7 @@ static __maybe_unused int drv_suspend(struct device=
 *dev)
> >       struct ltdc_device *ldev =3D ddev->dev_private;
> >       struct drm_atomic_state *state;
> >
> > -     if (WARN_ON(!ldev->suspend_state))
> > -             return -ENOENT;
> > +     WARN_ON(ldev->suspend_state);
> >
> >       state =3D drm_atomic_helper_suspend(ddev);
> >       if (IS_ERR(state))
> > @@ -155,15 +154,17 @@ static __maybe_unused int drv_resume(struct devic=
e *dev)
> >       struct ltdc_device *ldev =3D ddev->dev_private;
> >       int ret;
> >
> > +     if (WARN_ON(!ldev->suspend_state))
> > +             return -ENOENT;
> > +
> >       pm_runtime_force_resume(dev);
> >       ret =3D drm_atomic_helper_resume(ddev, ldev->suspend_state);
> > -     if (ret) {
> > +     if (ret)
> >               pm_runtime_force_suspend(dev);
> > -             ldev->suspend_state =3D NULL;
> > -             return ret;
> > -     }
> >
> > -     return 0;
> > +     ldev->suspend_state =3D NULL;
> > +
> > +     return ret;
> >   }
> >
> >   static __maybe_unused int drv_runtime_suspend(struct device *dev)
> >
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