From: Benjamin Gaignard <benjamin.gaignard@linaro.org>
To: Philippe CORNU <philippe.cornu@st.com>
Cc: Yannick FERTRE <yannick.fertre@st.com>,
Benjamin GAIGNARD <benjamin.gaignard@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>
Subject: Re: [PATCH] drm/stm: ltdc: check crtc state before enabling LIE
Date: Tue, 4 Feb 2020 11:58:30 +0100 [thread overview]
Message-ID: <CA+M3ks7jCHzOuHnOO=v5AgsqSRbMVxYhkMY332u5qec=jJtHsw@mail.gmail.com> (raw)
In-Reply-To: <f925ddf5-3265-638b-14b9-71b549b5a9ad@st.com>
Le jeu. 23 janv. 2020 à 10:50, Philippe CORNU <philippe.cornu@st.com> a écrit :
>
> Dear Yannick,
> Thank you for your patch,
>
> Acked-by: Philippe Cornu <philippe.cornu@st.com>
>
> Philippe :-)
>
> On 1/21/20 11:14 AM, Yannick Fertre wrote:
> > Following investigations of a hardware bug, the LIE interrupt
> > can occur while the display controller is not activated.
> > LIE interrupt (vblank) don't have to be set if the CRTC is not
> > enabled.
> >
Applied on drm-misc-next.
Thanks
Benjamin
> > Signed-off-by: Yannick Fertre <yannick.fertre@st.com>
> > ---
> > drivers/gpu/drm/stm/ltdc.c | 7 ++++++-
> > 1 file changed, 6 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
> > index c2815e8..ea654c7 100644
> > --- a/drivers/gpu/drm/stm/ltdc.c
> > +++ b/drivers/gpu/drm/stm/ltdc.c
> > @@ -648,9 +648,14 @@ static const struct drm_crtc_helper_funcs ltdc_crtc_helper_funcs = {
> > static int ltdc_crtc_enable_vblank(struct drm_crtc *crtc)
> > {
> > struct ltdc_device *ldev = crtc_to_ltdc(crtc);
> > + struct drm_crtc_state *state = crtc->state;
> >
> > DRM_DEBUG_DRIVER("\n");
> > - reg_set(ldev->regs, LTDC_IER, IER_LIE);
> > +
> > + if (state->enable)
> > + reg_set(ldev->regs, LTDC_IER, IER_LIE);
> > + else
> > + return -EPERM;
> >
> > return 0;
> > }
> >
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
prev parent reply other threads:[~2020-02-04 10:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-21 10:14 [PATCH] drm/stm: ltdc: check crtc state before enabling LIE Yannick Fertre
2020-01-23 9:50 ` Philippe CORNU
2020-02-04 10:58 ` Benjamin Gaignard [this message]
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