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From:   Benjamin Gaignard <benjamin.gaignard@linaro.org>
Date:   Wed, 24 Apr 2019 14:27:54 +0200
Message-ID: <CA+M3ks7RP5Ay367rL+Upcr-og-E35nGoiMbkSNP7N7XYeOUCOw@mail.gmail.com>
Subject: Re: [PATCH] drm/stm: ltdc: disable hw interrupts before its handler init
To:     Philippe CORNU <philippe.cornu@st.com>
Cc:     Yannick FERTRE <yannick.fertre@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 lun. 1 avr. 2019 =C3=A0 11:19, Philippe CORNU <philippe.cornu@st.com> a =
=C3=A9crit :
>
>
> On 3/29/19 4:48 PM, Yannick Fertr=C3=A9 wrote:
> > Interrupt register must be disabled before call of
> > devm_request_threaded_irq function to avoid dummy interruption.
> >
> > Signed-off-by: Yannick Fertr=C3=A9 <yannick.fertre@st.com>
> > ---
> >   drivers/gpu/drm/stm/ltdc.c | 8 ++++----
> >   1 file changed, 4 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
> > index b1741a9..ef5b4d6 100644
> > --- a/drivers/gpu/drm/stm/ltdc.c
> > +++ b/drivers/gpu/drm/stm/ltdc.c
> > @@ -1118,6 +1118,10 @@ int ltdc_load(struct drm_device *ddev)
> >               goto err;
> >       }
> >
> > +     /* Disable interrupts */
> > +     reg_clear(ldev->regs, LTDC_IER,
> > +               IER_LIE | IER_RRIE | IER_FUIE | IER_TERRIE);
> > +
> >       for (i =3D 0; i < MAX_IRQ; i++) {
> >               irq =3D platform_get_irq(pdev, i);
> >               if (irq < 0)
> > @@ -1138,10 +1142,6 @@ int ltdc_load(struct drm_device *ddev)
> >               reset_control_deassert(rstc);
> >       }
> >
> > -     /* Disable interrupts */
> > -     reg_clear(ldev->regs, LTDC_IER,
> > -               IER_LIE | IER_RRIE | IER_FUIE | IER_TERRIE);
> > -
>
> Dear Yannick,
> Thank you for your patch,
>
> Acked-by: Philippe Cornu <philippe.cornu@st.com>
>

Applied on drm-misc-next,
Thanks,
Benjamin

> Philippe :-)
>
> >       ret =3D ltdc_get_caps(ddev);
> >       if (ret) {
> >               DRM_ERROR("hardware identifier (0x%08x) not supported!\n"=
,
> >
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