[PATCH] drm/exynos: wait for the completion of pending page flip

[PATCH] drm/exynos: wait for the completion of pending page flip

[Inki Dae]

This patch fixes the issue that drm_vblank_get() is failed.

The issus occurs when next page flip request is tried
if previous page flip event wasn't completed yet and then
dpms became off.

So this patch make sure that page flip event is completed
before dpms goes to off.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_crtc.c |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index e8894bc..69a77e9 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -48,6 +48,8 @@ struct exynos_drm_crtc {
 	unsigned int			pipe;
 	unsigned int			dpms;
 	enum exynos_crtc_mode		mode;
+	wait_queue_head_t		pending_flip_queue;
+	atomic_t			pending_flip;
 };
 
 static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
@@ -61,6 +63,13 @@ static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
 		return;
 	}
 
+	if (mode > DRM_MODE_DPMS_ON) {
+		/* wait for the completion of page flip. */
+		wait_event(exynos_crtc->pending_flip_queue,
+				atomic_read(&exynos_crtc->pending_flip) == 0);
+		drm_vblank_off(crtc->dev, exynos_crtc->pipe);
+	}
+
 	exynos_drm_fn_encoder(crtc, &mode, exynos_drm_encoder_crtc_dpms);
 	exynos_crtc->dpms = mode;
 }
@@ -225,6 +234,7 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
 		spin_lock_irq(&dev->event_lock);
 		list_add_tail(&event->base.link,
 				&dev_priv->pageflip_event_list);
+		atomic_set(&exynos_crtc->pending_flip, 1);
 		spin_unlock_irq(&dev->event_lock);
 
 		crtc->fb = fb;
@@ -344,6 +354,8 @@ int exynos_drm_crtc_create(struct drm_device *dev, unsigned int nr)
 
 	exynos_crtc->pipe = nr;
 	exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
+	init_waitqueue_head(&exynos_crtc->pending_flip_queue);
+	atomic_set(&exynos_crtc->pending_flip, 0);
 	exynos_crtc->plane = exynos_plane_init(dev, 1 << nr, true);
 	if (!exynos_crtc->plane) {
 		kfree(exynos_crtc);
@@ -398,6 +410,8 @@ void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int crtc)
 {
 	struct exynos_drm_private *dev_priv = dev->dev_private;
 	struct drm_pending_vblank_event *e, *t;
+	struct drm_crtc *drm_crtc = dev_priv->crtc[crtc];
+	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(drm_crtc);
 	struct timeval now;
 	unsigned long flags;
 
@@ -419,6 +433,8 @@ void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int crtc)
 		list_move_tail(&e->base.link, &e->base.file_priv->event_list);
 		wake_up_interruptible(&e->base.file_priv->event_wait);
 		drm_vblank_put(dev, crtc);
+		atomic_set(&exynos_crtc->pending_flip, 0);
+		wake_up(&exynos_crtc->pending_flip_queue);
 	}
 
 	spin_unlock_irqrestore(&dev->event_lock, flags);
-- 
1.7.5.4

Re: [PATCH] drm/exynos: wait for the completion of pending page flip

[Stéphane Marchesin]

On Tue, May 21, 2013 at 1:08 AM, Inki Dae <inki.dae@samsung.com> wrote:
> This patch fixes the issue that drm_vblank_get() is failed.
>
> The issus occurs when next page flip request is tried
> if previous page flip event wasn't completed yet and then
> dpms became off.
>
> So this patch make sure that page flip event is completed
> before dpms goes to off.

Hi,

This patch is a squash of the two following patches from the Chrome OS
tree with the KDS bits removed and the dpms off bit added:

http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.git;a=commitdiff;h=2e77cd4e423967862ca01b1af82aa8b5b7429fc4;hp=aba002da4c6e5efec4d43e1ce33930a79269349a
http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.git;a=commitdiff;h=b4ec8bfa750ef43a43c2da746c8afdbb51002882;hp=4f28b9a75c928f229443d7c6c3163159ceb6903a

Please keep proper attribution.

>
> Signed-off-by: Inki Dae <inki.dae@samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
> ---
>  drivers/gpu/drm/exynos/exynos_drm_crtc.c |   16 ++++++++++++++++
>  1 files changed, 16 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> index e8894bc..69a77e9 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> @@ -48,6 +48,8 @@ struct exynos_drm_crtc {
>         unsigned int                    pipe;
>         unsigned int                    dpms;
>         enum exynos_crtc_mode           mode;
> +       wait_queue_head_t               pending_flip_queue;
> +       atomic_t                        pending_flip;
>  };
>
>  static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
> @@ -61,6 +63,13 @@ static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
>                 return;
>         }
>
> +       if (mode > DRM_MODE_DPMS_ON) {
> +               /* wait for the completion of page flip. */
> +               wait_event(exynos_crtc->pending_flip_queue,
> +                               atomic_read(&exynos_crtc->pending_flip) == 0);
> +               drm_vblank_off(crtc->dev, exynos_crtc->pipe);

You should be using vblank_put/get.

Stéphane

> +       }
> +
>         exynos_drm_fn_encoder(crtc, &mode, exynos_drm_encoder_crtc_dpms);
>         exynos_crtc->dpms = mode;
>  }
> @@ -225,6 +234,7 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
>                 spin_lock_irq(&dev->event_lock);
>                 list_add_tail(&event->base.link,
>                                 &dev_priv->pageflip_event_list);
> +               atomic_set(&exynos_crtc->pending_flip, 1);
>                 spin_unlock_irq(&dev->event_lock);
>
>                 crtc->fb = fb;
> @@ -344,6 +354,8 @@ int exynos_drm_crtc_create(struct drm_device *dev, unsigned int nr)
>
>         exynos_crtc->pipe = nr;
>         exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
> +       init_waitqueue_head(&exynos_crtc->pending_flip_queue);
> +       atomic_set(&exynos_crtc->pending_flip, 0);
>         exynos_crtc->plane = exynos_plane_init(dev, 1 << nr, true);
>         if (!exynos_crtc->plane) {
>                 kfree(exynos_crtc);
> @@ -398,6 +410,8 @@ void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int crtc)
>  {
>         struct exynos_drm_private *dev_priv = dev->dev_private;
>         struct drm_pending_vblank_event *e, *t;
> +       struct drm_crtc *drm_crtc = dev_priv->crtc[crtc];
> +       struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(drm_crtc);
>         struct timeval now;
>         unsigned long flags;
>
> @@ -419,6 +433,8 @@ void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int crtc)
>                 list_move_tail(&e->base.link, &e->base.file_priv->event_list);
>                 wake_up_interruptible(&e->base.file_priv->event_wait);
>                 drm_vblank_put(dev, crtc);
> +               atomic_set(&exynos_crtc->pending_flip, 0);
> +               wake_up(&exynos_crtc->pending_flip_queue);
>         }
>
>         spin_unlock_irqrestore(&dev->event_lock, flags);
> --
> 1.7.5.4
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH] drm/exynos: wait for the completion of pending page flip

[Inki Dae]

[-- Attachment #1.1: Type: text/plain, Size: 5199 bytes --]

2013/5/22 Stéphane Marchesin <stephane.marchesin@gmail.com>

> On Tue, May 21, 2013 at 1:08 AM, Inki Dae <inki.dae@samsung.com> wrote:
> > This patch fixes the issue that drm_vblank_get() is failed.
> >
> > The issus occurs when next page flip request is tried
> > if previous page flip event wasn't completed yet and then
> > dpms became off.
> >
> > So this patch make sure that page flip event is completed
> > before dpms goes to off.
>
> Hi,
>
> This patch is a squash of the two following patches from the Chrome OS
> tree with the KDS bits removed and the dpms off bit added:
>
>
> http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.git;a=commitdiff;h=2e77cd4e423967862ca01b1af82aa8b5b7429fc4;hp=aba002da4c6e5efec4d43e1ce33930a79269349a
>
> http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.git;a=commitdiff;h=b4ec8bfa750ef43a43c2da746c8afdbb51002882;hp=4f28b9a75c928f229443d7c6c3163159ceb6903a
>
> Please keep proper attribution.
>
>
Those patches are just for Chrome OS. Please post them if you want for
those to be considered so that they can be reviewed. That is why we attend
open source. One more comment, please do not abuse
exynos_drm_crtc_page_flip()

>
> Signed-off-by: Inki Dae <inki.dae@samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
> ---
>  drivers/gpu/drm/exynos/exynos_drm_crtc.c |   16 ++++++++++++++++
>  1 files changed, 16 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> index e8894bc..69a77e9 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> @@ -48,6 +48,8 @@ struct exynos_drm_crtc {
>         unsigned int                    pipe;
>         unsigned int                    dpms;
>         enum exynos_crtc_mode           mode;
> +       wait_queue_head_t               pending_flip_queue;
> +       atomic_t                        pending_flip;
>  };
>
>  static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
> @@ -61,6 +63,13 @@ static void exynos_drm_crtc_dpms(struct drm_crtc
*crtc, int mode)
>                 return;
>         }
>
> +       if (mode > DRM_MODE_DPMS_ON) {
> +               /* wait for the completion of page flip. */
> +               wait_event(exynos_crtc->pending_flip_queue,
> +                               atomic_read(&exynos_crtc->pending_flip)
== 0);
> +               drm_vblank_off(crtc->dev, exynos_crtc->pipe);

You should be using vblank_put/get.
>
>
No, drm_vblank_put should be called by exynos_drm_crtc_finish_pageflip().
And know that this patch makes sure that pended page flip event is
completed before dpms goes to off.

Thanks,
Inki Dae

Stéphane
>
> > +       }
> > +
> >         exynos_drm_fn_encoder(crtc, &mode, exynos_drm_encoder_crtc_dpms);
> >         exynos_crtc->dpms = mode;
> >  }
> > @@ -225,6 +234,7 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc
> *crtc,
> >                 spin_lock_irq(&dev->event_lock);
> >                 list_add_tail(&event->base.link,
> >                                 &dev_priv->pageflip_event_list);
> > +               atomic_set(&exynos_crtc->pending_flip, 1);
> >                 spin_unlock_irq(&dev->event_lock);
> >
> >                 crtc->fb = fb;
> > @@ -344,6 +354,8 @@ int exynos_drm_crtc_create(struct drm_device *dev,
> unsigned int nr)
> >
> >         exynos_crtc->pipe = nr;
> >         exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
> > +       init_waitqueue_head(&exynos_crtc->pending_flip_queue);
> > +       atomic_set(&exynos_crtc->pending_flip, 0);
> >         exynos_crtc->plane = exynos_plane_init(dev, 1 << nr, true);
> >         if (!exynos_crtc->plane) {
> >                 kfree(exynos_crtc);
> > @@ -398,6 +410,8 @@ void exynos_drm_crtc_finish_pageflip(struct
> drm_device *dev, int crtc)
> >  {
> >         struct exynos_drm_private *dev_priv = dev->dev_private;
> >         struct drm_pending_vblank_event *e, *t;
> > +       struct drm_crtc *drm_crtc = dev_priv->crtc[crtc];
> > +       struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(drm_crtc);
> >         struct timeval now;
> >         unsigned long flags;
> >
> > @@ -419,6 +433,8 @@ void exynos_drm_crtc_finish_pageflip(struct
> drm_device *dev, int crtc)
> >                 list_move_tail(&e->base.link,
> &e->base.file_priv->event_list);
> >                 wake_up_interruptible(&e->base.file_priv->event_wait);
> >                 drm_vblank_put(dev, crtc);
> > +               atomic_set(&exynos_crtc->pending_flip, 0);
> > +               wake_up(&exynos_crtc->pending_flip_queue);
> >         }
> >
> >         spin_unlock_irqrestore(&dev->event_lock, flags);
> > --
> > 1.7.5.4
> >
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/dri-devel
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>

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_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH] drm/exynos: wait for the completion of pending page flip

[Stéphane Marchesin]

On Tue, May 21, 2013 at 9:22 PM, Inki Dae <inki.dae@samsung.com> wrote:
>
>
>
> 2013/5/22 Stéphane Marchesin <stephane.marchesin@gmail.com>
>>
>> On Tue, May 21, 2013 at 1:08 AM, Inki Dae <inki.dae@samsung.com> wrote:
>> > This patch fixes the issue that drm_vblank_get() is failed.
>> >
>> > The issus occurs when next page flip request is tried
>> > if previous page flip event wasn't completed yet and then
>> > dpms became off.
>> >
>> > So this patch make sure that page flip event is completed
>> > before dpms goes to off.
>>
>> Hi,
>>
>> This patch is a squash of the two following patches from the Chrome OS
>> tree with the KDS bits removed and the dpms off bit added:
>>
>>
>> http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.git;a=commitdiff;h=2e77cd4e423967862ca01b1af82aa8b5b7429fc4;hp=aba002da4c6e5efec4d43e1ce33930a79269349a
>>
>> http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.git;a=commitdiff;h=b4ec8bfa750ef43a43c2da746c8afdbb51002882;hp=4f28b9a75c928f229443d7c6c3163159ceb6903a
>>
>> Please keep proper attribution.
>>
>
> Those patches are just for Chrome OS. Please post them if you want for those
> to be considered so that they can be reviewed.

We intend to, once they are rebased onto latest kernel. But what I'm
pointing out is that you're removing proper attribution from Chrome OS
patches, and this is the second time it has happened.

> That is why we attend open
> source. One more comment, please do not abuse exynos_drm_crtc_page_flip()
>

What do you mean by abuse?

>>
>> Signed-off-by: Inki Dae <inki.dae@samsung.com>
>> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
>> ---
>>  drivers/gpu/drm/exynos/exynos_drm_crtc.c |   16 ++++++++++++++++
>>  1 files changed, 16 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
>> b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
>> index e8894bc..69a77e9 100644
>> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
>> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
>> @@ -48,6 +48,8 @@ struct exynos_drm_crtc {
>>         unsigned int                    pipe;
>>         unsigned int                    dpms;
>>         enum exynos_crtc_mode           mode;
>> +       wait_queue_head_t               pending_flip_queue;
>> +       atomic_t                        pending_flip;
>>  };
>>
>>  static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
>> @@ -61,6 +63,13 @@ static void exynos_drm_crtc_dpms(struct drm_crtc *crtc,
>> int mode)
>>                 return;
>>         }
>>
>> +       if (mode > DRM_MODE_DPMS_ON) {
>> +               /* wait for the completion of page flip. */
>> +               wait_event(exynos_crtc->pending_flip_queue,
>> +                               atomic_read(&exynos_crtc->pending_flip) ==
>> 0);
>> +               drm_vblank_off(crtc->dev, exynos_crtc->pipe);
>
>> You should be using vblank_put/get.
>>
>
> No, drm_vblank_put should be called by exynos_drm_crtc_finish_pageflip().
> And know that this patch makes sure that pended page flip event is completed
> before dpms goes to off.

You need to do vblank_put/get while you're waiting. Otherwise you
don't know for sure that flips will happen. This is especially bad as
you don't use a timeout.

Stéphane

>
> Thanks,
> Inki Dae
>
>> Stéphane
>>
>> > +       }
>> > +
>> >         exynos_drm_fn_encoder(crtc, &mode,
>> > exynos_drm_encoder_crtc_dpms);
>> >         exynos_crtc->dpms = mode;
>> >  }
>> > @@ -225,6 +234,7 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc
>> > *crtc,
>> >                 spin_lock_irq(&dev->event_lock);
>> >                 list_add_tail(&event->base.link,
>> >                                 &dev_priv->pageflip_event_list);
>> > +               atomic_set(&exynos_crtc->pending_flip, 1);
>> >                 spin_unlock_irq(&dev->event_lock);
>> >
>> >                 crtc->fb = fb;
>> > @@ -344,6 +354,8 @@ int exynos_drm_crtc_create(struct drm_device *dev,
>> > unsigned int nr)
>> >
>> >         exynos_crtc->pipe = nr;
>> >         exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
>> > +       init_waitqueue_head(&exynos_crtc->pending_flip_queue);
>> > +       atomic_set(&exynos_crtc->pending_flip, 0);
>> >         exynos_crtc->plane = exynos_plane_init(dev, 1 << nr, true);
>> >         if (!exynos_crtc->plane) {
>> >                 kfree(exynos_crtc);
>> > @@ -398,6 +410,8 @@ void exynos_drm_crtc_finish_pageflip(struct
>> > drm_device *dev, int crtc)
>> >  {
>> >         struct exynos_drm_private *dev_priv = dev->dev_private;
>> >         struct drm_pending_vblank_event *e, *t;
>> > +       struct drm_crtc *drm_crtc = dev_priv->crtc[crtc];
>> > +       struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(drm_crtc);
>> >         struct timeval now;
>> >         unsigned long flags;
>> >
>> > @@ -419,6 +433,8 @@ void exynos_drm_crtc_finish_pageflip(struct
>> > drm_device *dev, int crtc)
>> >                 list_move_tail(&e->base.link,
>> > &e->base.file_priv->event_list);
>> >                 wake_up_interruptible(&e->base.file_priv->event_wait);
>> >                 drm_vblank_put(dev, crtc);
>> > +               atomic_set(&exynos_crtc->pending_flip, 0);
>> > +               wake_up(&exynos_crtc->pending_flip_queue);
>> >         }
>> >
>> >         spin_unlock_irqrestore(&dev->event_lock, flags);
>> > --
>> > 1.7.5.4
>> >
>> > _______________________________________________
>> > dri-devel mailing list
>> > dri-devel@lists.freedesktop.org
>> > http://lists.freedesktop.org/mailman/listinfo/dri-devel
>> _______________________________________________
>> dri-devel mailing list
>> dri-devel@lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>
>

Re: [PATCH] drm/exynos: wait for the completion of pending page flip

[Inki Dae]

[-- Attachment #1.1: Type: text/plain, Size: 6752 bytes --]

2013/5/22 Stéphane Marchesin <stephane.marchesin@gmail.com>

> On Tue, May 21, 2013 at 9:22 PM, Inki Dae <inki.dae@samsung.com> wrote:
> >
> >
> >
> > 2013/5/22 Stéphane Marchesin <stephane.marchesin@gmail.com>
> >>
> >> On Tue, May 21, 2013 at 1:08 AM, Inki Dae <inki.dae@samsung.com> wrote:
> >> > This patch fixes the issue that drm_vblank_get() is failed.
> >> >
> >> > The issus occurs when next page flip request is tried
> >> > if previous page flip event wasn't completed yet and then
> >> > dpms became off.
> >> >
> >> > So this patch make sure that page flip event is completed
> >> > before dpms goes to off.
> >>
> >> Hi,
> >>
> >> This patch is a squash of the two following patches from the Chrome OS
> >> tree with the KDS bits removed and the dpms off bit added:
> >>
> >>
> >>
> http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.git;a=commitdiff;h=2e77cd4e423967862ca01b1af82aa8b5b7429fc4;hp=aba002da4c6e5efec4d43e1ce33930a79269349a
> >>
> >>
> http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.git;a=commitdiff;h=b4ec8bfa750ef43a43c2da746c8afdbb51002882;hp=4f28b9a75c928f229443d7c6c3163159ceb6903a
> >>
> >> Please keep proper attribution.
> >>
> >
> > Those patches are just for Chrome OS. Please post them if you want for
> those
> > to be considered so that they can be reviewed.
>
> We intend to, once they are rebased onto latest kernel. But what I'm
> pointing out is that you're removing proper attribution from Chrome OS
> patches, and this is the second time it has happened.
>

What is mean? does mainline kernel have the attribution? if not so, we
don't need to consider it. And please know that I can not be aware of you
have such patch set without any posting.


>
> > That is why we attend open
> > source. One more comment, please do not abuse exynos_drm_crtc_page_flip()
> >
>
> What do you mean by abuse?
>
> >>
> >> Signed-off-by: Inki Dae <inki.dae@samsung.com>
> >> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
> >> ---
> >>  drivers/gpu/drm/exynos/exynos_drm_crtc.c |   16 ++++++++++++++++
> >>  1 files changed, 16 insertions(+), 0 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> >> b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> >> index e8894bc..69a77e9 100644
> >> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> >> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> >> @@ -48,6 +48,8 @@ struct exynos_drm_crtc {
> >>         unsigned int                    pipe;
> >>         unsigned int                    dpms;
> >>         enum exynos_crtc_mode           mode;
> >> +       wait_queue_head_t               pending_flip_queue;
> >> +       atomic_t                        pending_flip;
> >>  };
> >>
> >>  static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
> >> @@ -61,6 +63,13 @@ static void exynos_drm_crtc_dpms(struct drm_crtc
> *crtc,
> >> int mode)
> >>                 return;
> >>         }
> >>
> >> +       if (mode > DRM_MODE_DPMS_ON) {
> >> +               /* wait for the completion of page flip. */
> >> +               wait_event(exynos_crtc->pending_flip_queue,
> >> +                               atomic_read(&exynos_crtc->pending_flip)
> ==
> >> 0);
> >> +               drm_vblank_off(crtc->dev, exynos_crtc->pipe);
> >
> >> You should be using vblank_put/get.
> >>
> >
> > No, drm_vblank_put should be called by exynos_drm_crtc_finish_pageflip().
> > And know that this patch makes sure that pended page flip event is
> completed
> > before dpms goes to off.
>
> You need to do vblank_put/get while you're waiting. Otherwise you
> don't know for sure that flips will happen. This is especially bad as
> you don't use a timeout.
>

Understood. Right, drm_vblank_get call before wait_event and drm_vblank_put
call after wait_event.

Thanks,
Inki Dae


>
> Stéphane
>
> >
> > Thanks,
> > Inki Dae
> >
> >> Stéphane
> >>
> >> > +       }
> >> > +
> >> >         exynos_drm_fn_encoder(crtc, &mode,
> >> > exynos_drm_encoder_crtc_dpms);
> >> >         exynos_crtc->dpms = mode;
> >> >  }
> >> > @@ -225,6 +234,7 @@ static int exynos_drm_crtc_page_flip(struct
> drm_crtc
> >> > *crtc,
> >> >                 spin_lock_irq(&dev->event_lock);
> >> >                 list_add_tail(&event->base.link,
> >> >                                 &dev_priv->pageflip_event_list);
> >> > +               atomic_set(&exynos_crtc->pending_flip, 1);
> >> >                 spin_unlock_irq(&dev->event_lock);
> >> >
> >> >                 crtc->fb = fb;
> >> > @@ -344,6 +354,8 @@ int exynos_drm_crtc_create(struct drm_device *dev,
> >> > unsigned int nr)
> >> >
> >> >         exynos_crtc->pipe = nr;
> >> >         exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
> >> > +       init_waitqueue_head(&exynos_crtc->pending_flip_queue);
> >> > +       atomic_set(&exynos_crtc->pending_flip, 0);
> >> >         exynos_crtc->plane = exynos_plane_init(dev, 1 << nr, true);
> >> >         if (!exynos_crtc->plane) {
> >> >                 kfree(exynos_crtc);
> >> > @@ -398,6 +410,8 @@ void exynos_drm_crtc_finish_pageflip(struct
> >> > drm_device *dev, int crtc)
> >> >  {
> >> >         struct exynos_drm_private *dev_priv = dev->dev_private;
> >> >         struct drm_pending_vblank_event *e, *t;
> >> > +       struct drm_crtc *drm_crtc = dev_priv->crtc[crtc];
> >> > +       struct exynos_drm_crtc *exynos_crtc =
> to_exynos_crtc(drm_crtc);
> >> >         struct timeval now;
> >> >         unsigned long flags;
> >> >
> >> > @@ -419,6 +433,8 @@ void exynos_drm_crtc_finish_pageflip(struct
> >> > drm_device *dev, int crtc)
> >> >                 list_move_tail(&e->base.link,
> >> > &e->base.file_priv->event_list);
> >> >                 wake_up_interruptible(&e->base.file_priv->event_wait);
> >> >                 drm_vblank_put(dev, crtc);
> >> > +               atomic_set(&exynos_crtc->pending_flip, 0);
> >> > +               wake_up(&exynos_crtc->pending_flip_queue);
> >> >         }
> >> >
> >> >         spin_unlock_irqrestore(&dev->event_lock, flags);
> >> > --
> >> > 1.7.5.4
> >> >
> >> > _______________________________________________
> >> > dri-devel mailing list
> >> > dri-devel@lists.freedesktop.org
> >> > http://lists.freedesktop.org/mailman/listinfo/dri-devel
> >> _______________________________________________
> >> dri-devel mailing list
> >> dri-devel@lists.freedesktop.org
> >> http://lists.freedesktop.org/mailman/listinfo/dri-devel
> >
> >
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>

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Re: [PATCH] drm/exynos: wait for the completion of pending page flip

[Inki Dae]

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2013/5/22 Inki Dae <inki.dae@samsung.com>

>
>
>
> 2013/5/22 Stéphane Marchesin <stephane.marchesin@gmail.com>
>
>> On Tue, May 21, 2013 at 9:22 PM, Inki Dae <inki.dae@samsung.com> wrote:
>> >
>> >
>> >
>> > 2013/5/22 Stéphane Marchesin <stephane.marchesin@gmail.com>
>> >>
>> >> On Tue, May 21, 2013 at 1:08 AM, Inki Dae <inki.dae@samsung.com>
>> wrote:
>> >> > This patch fixes the issue that drm_vblank_get() is failed.
>> >> >
>> >> > The issus occurs when next page flip request is tried
>> >> > if previous page flip event wasn't completed yet and then
>> >> > dpms became off.
>> >> >
>> >> > So this patch make sure that page flip event is completed
>> >> > before dpms goes to off.
>> >>
>> >> Hi,
>> >>
>> >> This patch is a squash of the two following patches from the Chrome OS
>> >> tree with the KDS bits removed and the dpms off bit added:
>> >>
>> >>
>> >>
>> http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.git;a=commitdiff;h=2e77cd4e423967862ca01b1af82aa8b5b7429fc4;hp=aba002da4c6e5efec4d43e1ce33930a79269349a
>> >>
>> >>
>> http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.git;a=commitdiff;h=b4ec8bfa750ef43a43c2da746c8afdbb51002882;hp=4f28b9a75c928f229443d7c6c3163159ceb6903a
>> >>
>> >> Please keep proper attribution.
>> >>
>> >
>> > Those patches are just for Chrome OS. Please post them if you want for
>> those
>> > to be considered so that they can be reviewed.
>>
>> We intend to, once they are rebased onto latest kernel. But what I'm
>> pointing out is that you're removing proper attribution from Chrome OS
>> patches, and this is the second time it has happened.
>>
>
> What is mean? does mainline kernel have the attribution? if not so, we
> don't need to consider it. And please know that I can not be aware of you
> have such patch set without any posting.
>
>
>>
>> > That is why we attend open
>> > source. One more comment, please do not abuse
>> exynos_drm_crtc_page_flip()
>> >
>>
>> What do you mean by abuse?
>>
>> >>
>> >> Signed-off-by: Inki Dae <inki.dae@samsung.com>
>> >> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
>> >> ---
>> >>  drivers/gpu/drm/exynos/exynos_drm_crtc.c |   16 ++++++++++++++++
>> >>  1 files changed, 16 insertions(+), 0 deletions(-)
>> >>
>> >> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
>> >> b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
>> >> index e8894bc..69a77e9 100644
>> >> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
>> >> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
>> >> @@ -48,6 +48,8 @@ struct exynos_drm_crtc {
>> >>         unsigned int                    pipe;
>> >>         unsigned int                    dpms;
>> >>         enum exynos_crtc_mode           mode;
>> >> +       wait_queue_head_t               pending_flip_queue;
>> >> +       atomic_t                        pending_flip;
>> >>  };
>> >>
>> >>  static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
>> >> @@ -61,6 +63,13 @@ static void exynos_drm_crtc_dpms(struct drm_crtc
>> *crtc,
>> >> int mode)
>> >>                 return;
>> >>         }
>> >>
>> >> +       if (mode > DRM_MODE_DPMS_ON) {
>> >> +               /* wait for the completion of page flip. */
>> >> +               wait_event(exynos_crtc->pending_flip_queue,
>> >> +
>> atomic_read(&exynos_crtc->pending_flip) ==
>> >> 0);
>> >> +               drm_vblank_off(crtc->dev, exynos_crtc->pipe);
>> >
>> >> You should be using vblank_put/get.
>> >>
>> >
>> > No, drm_vblank_put should be called by
>> exynos_drm_crtc_finish_pageflip().
>> > And know that this patch makes sure that pended page flip event is
>> completed
>> > before dpms goes to off.
>>
>> You need to do vblank_put/get while you're waiting. Otherwise you
>> don't know for sure that flips will happen. This is especially bad as
>> you don't use a timeout.
>>
>
> Understood. Right, drm_vblank_get call before wait_event and
> drm_vblank_put call after wait_event.
>
>
drm_vblank_get/put are needed really? I think that
exynos_crtc->pending_flip is 0 if vblank interrrupt was disabled so
wait_event will be returned just.



> Thanks,
> Inki Dae
>
>
>>
>> Stéphane
>>
>> >
>> > Thanks,
>> > Inki Dae
>> >
>> >> Stéphane
>> >>
>> >> > +       }
>> >> > +
>> >> >         exynos_drm_fn_encoder(crtc, &mode,
>> >> > exynos_drm_encoder_crtc_dpms);
>> >> >         exynos_crtc->dpms = mode;
>> >> >  }
>> >> > @@ -225,6 +234,7 @@ static int exynos_drm_crtc_page_flip(struct
>> drm_crtc
>> >> > *crtc,
>> >> >                 spin_lock_irq(&dev->event_lock);
>> >> >                 list_add_tail(&event->base.link,
>> >> >                                 &dev_priv->pageflip_event_list);
>> >> > +               atomic_set(&exynos_crtc->pending_flip, 1);
>> >> >                 spin_unlock_irq(&dev->event_lock);
>> >> >
>> >> >                 crtc->fb = fb;
>> >> > @@ -344,6 +354,8 @@ int exynos_drm_crtc_create(struct drm_device
>> *dev,
>> >> > unsigned int nr)
>> >> >
>> >> >         exynos_crtc->pipe = nr;
>> >> >         exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
>> >> > +       init_waitqueue_head(&exynos_crtc->pending_flip_queue);
>> >> > +       atomic_set(&exynos_crtc->pending_flip, 0);
>> >> >         exynos_crtc->plane = exynos_plane_init(dev, 1 << nr, true);
>> >> >         if (!exynos_crtc->plane) {
>> >> >                 kfree(exynos_crtc);
>> >> > @@ -398,6 +410,8 @@ void exynos_drm_crtc_finish_pageflip(struct
>> >> > drm_device *dev, int crtc)
>> >> >  {
>> >> >         struct exynos_drm_private *dev_priv = dev->dev_private;
>> >> >         struct drm_pending_vblank_event *e, *t;
>> >> > +       struct drm_crtc *drm_crtc = dev_priv->crtc[crtc];
>> >> > +       struct exynos_drm_crtc *exynos_crtc =
>> to_exynos_crtc(drm_crtc);
>> >> >         struct timeval now;
>> >> >         unsigned long flags;
>> >> >
>> >> > @@ -419,6 +433,8 @@ void exynos_drm_crtc_finish_pageflip(struct
>> >> > drm_device *dev, int crtc)
>> >> >                 list_move_tail(&e->base.link,
>> >> > &e->base.file_priv->event_list);
>> >> >
>> wake_up_interruptible(&e->base.file_priv->event_wait);
>> >> >                 drm_vblank_put(dev, crtc);
>> >> > +               atomic_set(&exynos_crtc->pending_flip, 0);
>> >> > +               wake_up(&exynos_crtc->pending_flip_queue);
>> >> >         }
>> >> >
>> >> >         spin_unlock_irqrestore(&dev->event_lock, flags);
>> >> > --
>> >> > 1.7.5.4
>> >> >
>> >> > _______________________________________________
>> >> > dri-devel mailing list
>> >> > dri-devel@lists.freedesktop.org
>> >> > http://lists.freedesktop.org/mailman/listinfo/dri-devel
>> >> _______________________________________________
>> >> dri-devel mailing list
>> >> dri-devel@lists.freedesktop.org
>> >> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>> >
>> >
>> _______________________________________________
>> dri-devel mailing list
>> dri-devel@lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>>
>
>

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Re: [PATCH] drm/exynos: wait for the completion of pending page flip

[Tomasz Figa]

Hi Inki,

On Wednesday 22 of May 2013 15:37:14 Inki Dae wrote:
> 2013/5/22 Stéphane Marchesin <stephane.marchesin@gmail.com>
> 
> > On Tue, May 21, 2013 at 9:22 PM, Inki Dae <inki.dae@samsung.com> 
wrote:
> > > 2013/5/22 Stéphane Marchesin <stephane.marchesin@gmail.com>
> > > 
> > >> On Tue, May 21, 2013 at 1:08 AM, Inki Dae <inki.dae@samsung.com> 
wrote:
> > >> > This patch fixes the issue that drm_vblank_get() is failed.
> > >> > 
> > >> > The issus occurs when next page flip request is tried
> > >> > if previous page flip event wasn't completed yet and then
> > >> > dpms became off.
> > >> > 
> > >> > So this patch make sure that page flip event is completed
> > >> > before dpms goes to off.
> > >> 
> > >> Hi,
> > >> 
> > >> This patch is a squash of the two following patches from the Chrome
> > >> OS
> > 
> > >> tree with the KDS bits removed and the dpms off bit added:
> > http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.g
> > it;a=commitdiff;h=2e77cd4e423967862ca01b1af82aa8b5b7429fc4;hp=aba002da
> > 4c6e5efec4d43e1ce33930a79269349a
> > 
> > 
> > http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.g
> > it;a=commitdiff;h=b4ec8bfa750ef43a43c2da746c8afdbb51002882;hp=4f28b9a7
> > 5c928f229443d7c6c3163159ceb6903a> 
> > >> Please keep proper attribution.
> > > 
> > > Those patches are just for Chrome OS. Please post them if you want
> > > for
> > 
> > those
> > 
> > > to be considered so that they can be reviewed.
> > 
> > We intend to, once they are rebased onto latest kernel. But what I'm
> > pointing out is that you're removing proper attribution from Chrome OS
> > patches, and this is the second time it has happened.
> 
> What is mean? does mainline kernel have the attribution? if not so, we
> don't need to consider it. And please know that I can not be aware of
> you have such patch set without any posting.
> 

at·tri·bu·tion 
n.
1. The act of attributing, especially the act of establishing a particular 
person as the creator of a work of art
[1]

So yes, mainline kernel has attribution. Actually posting something as 
work of someone that is not the author of the posted work is considered 
bad everywhere, isn't it?

However looking at those two patches linked by Stéphane, I'm not really 
sure this patch is really just a squash of them. Stéphane, are you 100% 
sure that your claims are true?

Best regards,
Tomasz

[1] http://www.thefreedictionary.com/attribution

> > > That is why we attend open
> > > source. One more comment, please do not abuse
> > > exynos_drm_crtc_page_flip()> 
> > What do you mean by abuse?
> > 
> > >> Signed-off-by: Inki Dae <inki.dae@samsung.com>
> > >> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
> > >> ---
> > >> 
> > >>  drivers/gpu/drm/exynos/exynos_drm_crtc.c |   16 ++++++++++++++++
> > >>  1 files changed, 16 insertions(+), 0 deletions(-)
> > >> 
> > >> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> > >> b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> > >> index e8894bc..69a77e9 100644
> > >> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> > >> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> > >> @@ -48,6 +48,8 @@ struct exynos_drm_crtc {
> > >> 
> > >>         unsigned int                    pipe;
> > >>         unsigned int                    dpms;
> > >>         enum exynos_crtc_mode           mode;
> > >> 
> > >> +       wait_queue_head_t               pending_flip_queue;
> > >> +       atomic_t                        pending_flip;
> > >> 
> > >>  };
> > >>  
> > >>  static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
> > >> 
> > >> @@ -61,6 +63,13 @@ static void exynos_drm_crtc_dpms(struct drm_crtc
> > 
> > *crtc,
> > 
> > >> int mode)
> > >> 
> > >>                 return;
> > >>         
> > >>         }
> > >> 
> > >> +       if (mode > DRM_MODE_DPMS_ON) {
> > >> +               /* wait for the completion of page flip. */
> > >> +               wait_event(exynos_crtc->pending_flip_queue,
> > >> +                              
> > >> atomic_read(&exynos_crtc->pending_flip)
> > 
> > ==
> > 
> > >> 0);
> > >> +               drm_vblank_off(crtc->dev, exynos_crtc->pipe);
> > >> 
> > >> You should be using vblank_put/get.
> > > 
> > > No, drm_vblank_put should be called by
> > > exynos_drm_crtc_finish_pageflip(). And know that this patch makes
> > > sure that pended page flip event is> 
> > completed
> > 
> > > before dpms goes to off.
> > 
> > You need to do vblank_put/get while you're waiting. Otherwise you
> > don't know for sure that flips will happen. This is especially bad as
> > you don't use a timeout.
> 
> Understood. Right, drm_vblank_get call before wait_event and
> drm_vblank_put call after wait_event.
> 
> Thanks,
> Inki Dae
> 
> > Stéphane
> > 
> > > Thanks,
> > > Inki Dae
> > > 
> > >> Stéphane
> > >> 
> > >> > +       }
> > >> > +
> > >> > 
> > >> >         exynos_drm_fn_encoder(crtc, &mode,
> > >> > 
> > >> > exynos_drm_encoder_crtc_dpms);
> > >> > 
> > >> >         exynos_crtc->dpms = mode;
> > >> >  
> > >> >  }
> > >> > 
> > >> > @@ -225,6 +234,7 @@ static int exynos_drm_crtc_page_flip(struct
> > 
> > drm_crtc
> > 
> > >> > *crtc,
> > >> > 
> > >> >                 spin_lock_irq(&dev->event_lock);
> > >> >                 list_add_tail(&event->base.link,
> > >> >                 
> > >> >                                 &dev_priv->pageflip_event_list);
> > >> > 
> > >> > +               atomic_set(&exynos_crtc->pending_flip, 1);
> > >> > 
> > >> >                 spin_unlock_irq(&dev->event_lock);
> > >> >                 
> > >> >                 crtc->fb = fb;
> > >> > 
> > >> > @@ -344,6 +354,8 @@ int exynos_drm_crtc_create(struct drm_device
> > >> > *dev,
> > >> > unsigned int nr)
> > >> > 
> > >> >         exynos_crtc->pipe = nr;
> > >> >         exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
> > >> > 
> > >> > +       init_waitqueue_head(&exynos_crtc->pending_flip_queue);
> > >> > +       atomic_set(&exynos_crtc->pending_flip, 0);
> > >> > 
> > >> >         exynos_crtc->plane = exynos_plane_init(dev, 1 << nr,
> > >> >         true);
> > >> >         if (!exynos_crtc->plane) {
> > >> >         
> > >> >                 kfree(exynos_crtc);
> > >> > 
> > >> > @@ -398,6 +410,8 @@ void exynos_drm_crtc_finish_pageflip(struct
> > >> > drm_device *dev, int crtc)
> > >> > 
> > >> >  {
> > >> >  
> > >> >         struct exynos_drm_private *dev_priv = dev->dev_private;
> > >> >         struct drm_pending_vblank_event *e, *t;
> > >> > 
> > >> > +       struct drm_crtc *drm_crtc = dev_priv->crtc[crtc];
> > >> > +       struct exynos_drm_crtc *exynos_crtc =
> > 
> > to_exynos_crtc(drm_crtc);
> > 
> > >> >         struct timeval now;
> > >> >         unsigned long flags;
> > >> > 
> > >> > @@ -419,6 +433,8 @@ void exynos_drm_crtc_finish_pageflip(struct
> > >> > drm_device *dev, int crtc)
> > >> > 
> > >> >                 list_move_tail(&e->base.link,
> > >> > 
> > >> > &e->base.file_priv->event_list);
> > >> > 
> > >> >                 wake_up_interruptible(&e->base.file_priv->event_w
> > >> >                 ait);
> > >> >                 drm_vblank_put(dev, crtc);
> > >> > 
> > >> > +               atomic_set(&exynos_crtc->pending_flip, 0);
> > >> > +               wake_up(&exynos_crtc->pending_flip_queue);
> > >> > 
> > >> >         }
> > >> >         
> > >> >         spin_unlock_irqrestore(&dev->event_lock, flags);
> > >> > 
> > >> > --
> > >> > 1.7.5.4
> > >> > 
> > >> > _______________________________________________
> > >> > dri-devel mailing list
> > >> > dri-devel@lists.freedesktop.org
> > >> > http://lists.freedesktop.org/mailman/listinfo/dri-devel
> > >> 
> > >> _______________________________________________
> > >> dri-devel mailing list
> > >> dri-devel@lists.freedesktop.org
> > >> http://lists.freedesktop.org/mailman/listinfo/dri-devel
> > 
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH] drm/exynos: wait for the completion of pending page flip

[Kyungmin Park]

[-- Attachment #1.1: Type: text/plain, Size: 9250 bytes --]

On Wed, May 22, 2013 at 5:23 PM, Tomasz Figa <tomasz.figa@gmail.com> wrote:

> Hi Inki,
>
> On Wednesday 22 of May 2013 15:37:14 Inki Dae wrote:
> > 2013/5/22 Stéphane Marchesin <stephane.marchesin@gmail.com>
> >
> > > On Tue, May 21, 2013 at 9:22 PM, Inki Dae <inki.dae@samsung.com>
> wrote:
> > > > 2013/5/22 Stéphane Marchesin <stephane.marchesin@gmail.com>
> > > >
> > > >> On Tue, May 21, 2013 at 1:08 AM, Inki Dae <inki.dae@samsung.com>
> wrote:
> > > >> > This patch fixes the issue that drm_vblank_get() is failed.
> > > >> >
> > > >> > The issus occurs when next page flip request is tried
> > > >> > if previous page flip event wasn't completed yet and then
> > > >> > dpms became off.
> > > >> >
> > > >> > So this patch make sure that page flip event is completed
> > > >> > before dpms goes to off.
> > > >>
> > > >> Hi,
> > > >>
> > > >> This patch is a squash of the two following patches from the Chrome
> > > >> OS
> > >
> > > >> tree with the KDS bits removed and the dpms off bit added:
> > > http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.g
> > > it;a=commitdiff;h=2e77cd4e423967862ca01b1af82aa8b5b7429fc4;hp=aba002da
> > > 4c6e5efec4d43e1ce33930a79269349a
> > >
> > >
> > > http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.g
> > > it;a=commitdiff;h=b4ec8bfa750ef43a43c2da746c8afdbb51002882;hp=4f28b9a7
> > > 5c928f229443d7c6c3163159ceb6903a>
> > > >> Please keep proper attribution.
> > > >
> > > > Those patches are just for Chrome OS. Please post them if you want
> > > > for
> > >
> > > those
> > >
> > > > to be considered so that they can be reviewed.
>
Hi Stephane,

> > >
> > > We intend to, once they are rebased onto latest kernel. But what I'm
> > > pointing out is that you're removing proper attribution from Chrome OS
> > > patches, and this is the second time it has happened.
>
First, we don't know what's going on Chrome OS. probably you think we refer
your codes. but we don't know chrome codes and doesn't refer it. it's our
finding from our use case.
Second, samsung has lots of division. some engineers are working with
Chrome OS. but ours is not their division.
now we're working on anoter platform and use exynos drm.
As you know "chinese wall". we're doing it properly.

Thank you,
Kyungmin Park

> >
> > What is mean? does mainline kernel have the attribution? if not so, we
> > don't need to consider it. And please know that I can not be aware of
> > you have such patch set without any posting.
> >
>
> at·tri·bu·tion
> n.
> 1. The act of attributing, especially the act of establishing a particular
> person as the creator of a work of art
> [1]
>
> So yes, mainline kernel has attribution. Actually posting something as
> work of someone that is not the author of the posted work is considered
> bad everywhere, isn't it?
>
> However looking at those two patches linked by Stéphane, I'm not really
> sure this patch is really just a squash of them. Stéphane, are you 100%
> sure that your claims are true?
>
> Best regards,
> Tomasz
>
> [1] http://www.thefreedictionary.com/attribution
>
> > > > That is why we attend open
> > > > source. One more comment, please do not abuse
> > > > exynos_drm_crtc_page_flip()>
> > > What do you mean by abuse?
> > >
> > > >> Signed-off-by: Inki Dae <inki.dae@samsung.com>
> > > >> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
> > > >> ---
> > > >>
> > > >>  drivers/gpu/drm/exynos/exynos_drm_crtc.c |   16 ++++++++++++++++
> > > >>  1 files changed, 16 insertions(+), 0 deletions(-)
> > > >>
> > > >> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> > > >> b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> > > >> index e8894bc..69a77e9 100644
> > > >> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> > > >> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> > > >> @@ -48,6 +48,8 @@ struct exynos_drm_crtc {
> > > >>
> > > >>         unsigned int                    pipe;
> > > >>         unsigned int                    dpms;
> > > >>         enum exynos_crtc_mode           mode;
> > > >>
> > > >> +       wait_queue_head_t               pending_flip_queue;
> > > >> +       atomic_t                        pending_flip;
> > > >>
> > > >>  };
> > > >>
> > > >>  static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
> > > >>
> > > >> @@ -61,6 +63,13 @@ static void exynos_drm_crtc_dpms(struct drm_crtc
> > >
> > > *crtc,
> > >
> > > >> int mode)
> > > >>
> > > >>                 return;
> > > >>
> > > >>         }
> > > >>
> > > >> +       if (mode > DRM_MODE_DPMS_ON) {
> > > >> +               /* wait for the completion of page flip. */
> > > >> +               wait_event(exynos_crtc->pending_flip_queue,
> > > >> +
> > > >> atomic_read(&exynos_crtc->pending_flip)
> > >
> > > ==
> > >
> > > >> 0);
> > > >> +               drm_vblank_off(crtc->dev, exynos_crtc->pipe);
> > > >>
> > > >> You should be using vblank_put/get.
> > > >
> > > > No, drm_vblank_put should be called by
> > > > exynos_drm_crtc_finish_pageflip(). And know that this patch makes
> > > > sure that pended page flip event is>
> > > completed
> > >
> > > > before dpms goes to off.
> > >
> > > You need to do vblank_put/get while you're waiting. Otherwise you
> > > don't know for sure that flips will happen. This is especially bad as
> > > you don't use a timeout.
> >
> > Understood. Right, drm_vblank_get call before wait_event and
> > drm_vblank_put call after wait_event.
> >
> > Thanks,
> > Inki Dae
> >
> > > Stéphane
> > >
> > > > Thanks,
> > > > Inki Dae
> > > >
> > > >> Stéphane
> > > >>
> > > >> > +       }
> > > >> > +
> > > >> >
> > > >> >         exynos_drm_fn_encoder(crtc, &mode,
> > > >> >
> > > >> > exynos_drm_encoder_crtc_dpms);
> > > >> >
> > > >> >         exynos_crtc->dpms = mode;
> > > >> >
> > > >> >  }
> > > >> >
> > > >> > @@ -225,6 +234,7 @@ static int exynos_drm_crtc_page_flip(struct
> > >
> > > drm_crtc
> > >
> > > >> > *crtc,
> > > >> >
> > > >> >                 spin_lock_irq(&dev->event_lock);
> > > >> >                 list_add_tail(&event->base.link,
> > > >> >
> > > >> >                                 &dev_priv->pageflip_event_list);
> > > >> >
> > > >> > +               atomic_set(&exynos_crtc->pending_flip, 1);
> > > >> >
> > > >> >                 spin_unlock_irq(&dev->event_lock);
> > > >> >
> > > >> >                 crtc->fb = fb;
> > > >> >
> > > >> > @@ -344,6 +354,8 @@ int exynos_drm_crtc_create(struct drm_device
> > > >> > *dev,
> > > >> > unsigned int nr)
> > > >> >
> > > >> >         exynos_crtc->pipe = nr;
> > > >> >         exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
> > > >> >
> > > >> > +       init_waitqueue_head(&exynos_crtc->pending_flip_queue);
> > > >> > +       atomic_set(&exynos_crtc->pending_flip, 0);
> > > >> >
> > > >> >         exynos_crtc->plane = exynos_plane_init(dev, 1 << nr,
> > > >> >         true);
> > > >> >         if (!exynos_crtc->plane) {
> > > >> >
> > > >> >                 kfree(exynos_crtc);
> > > >> >
> > > >> > @@ -398,6 +410,8 @@ void exynos_drm_crtc_finish_pageflip(struct
> > > >> > drm_device *dev, int crtc)
> > > >> >
> > > >> >  {
> > > >> >
> > > >> >         struct exynos_drm_private *dev_priv = dev->dev_private;
> > > >> >         struct drm_pending_vblank_event *e, *t;
> > > >> >
> > > >> > +       struct drm_crtc *drm_crtc = dev_priv->crtc[crtc];
> > > >> > +       struct exynos_drm_crtc *exynos_crtc =
> > >
> > > to_exynos_crtc(drm_crtc);
> > >
> > > >> >         struct timeval now;
> > > >> >         unsigned long flags;
> > > >> >
> > > >> > @@ -419,6 +433,8 @@ void exynos_drm_crtc_finish_pageflip(struct
> > > >> > drm_device *dev, int crtc)
> > > >> >
> > > >> >                 list_move_tail(&e->base.link,
> > > >> >
> > > >> > &e->base.file_priv->event_list);
> > > >> >
> > > >> >                 wake_up_interruptible(&e->base.file_priv->event_w
> > > >> >                 ait);
> > > >> >                 drm_vblank_put(dev, crtc);
> > > >> >
> > > >> > +               atomic_set(&exynos_crtc->pending_flip, 0);
> > > >> > +               wake_up(&exynos_crtc->pending_flip_queue);
> > > >> >
> > > >> >         }
> > > >> >
> > > >> >         spin_unlock_irqrestore(&dev->event_lock, flags);
> > > >> >
> > > >> > --
> > > >> > 1.7.5.4
> > > >> >
> > > >> > _______________________________________________
> > > >> > dri-devel mailing list
> > > >> > dri-devel@lists.freedesktop.org
> > > >> > http://lists.freedesktop.org/mailman/listinfo/dri-devel
> > > >>
> > > >> _______________________________________________
> > > >> dri-devel mailing list
> > > >> dri-devel@lists.freedesktop.org
> > > >> http://lists.freedesktop.org/mailman/listinfo/dri-devel
> > >
> > > _______________________________________________
> > > dri-devel mailing list
> > > dri-devel@lists.freedesktop.org
> > > http://lists.freedesktop.org/mailman/listinfo/dri-devel
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>

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_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH] drm/exynos: wait for the completion of pending page flip

[Inki Dae]

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2013/5/22 Tomasz Figa <tomasz.figa@gmail.com>

> Hi Inki,
>
> On Wednesday 22 of May 2013 15:37:14 Inki Dae wrote:
> > 2013/5/22 Stéphane Marchesin <stephane.marchesin@gmail.com>
> >
> > > On Tue, May 21, 2013 at 9:22 PM, Inki Dae <inki.dae@samsung.com>
> wrote:
> > > > 2013/5/22 Stéphane Marchesin <stephane.marchesin@gmail.com>
> > > >
> > > >> On Tue, May 21, 2013 at 1:08 AM, Inki Dae <inki.dae@samsung.com>
> wrote:
> > > >> > This patch fixes the issue that drm_vblank_get() is failed.
> > > >> >
> > > >> > The issus occurs when next page flip request is tried
> > > >> > if previous page flip event wasn't completed yet and then
> > > >> > dpms became off.
> > > >> >
> > > >> > So this patch make sure that page flip event is completed
> > > >> > before dpms goes to off.
> > > >>
> > > >> Hi,
> > > >>
> > > >> This patch is a squash of the two following patches from the Chrome
> > > >> OS
> > >
> > > >> tree with the KDS bits removed and the dpms off bit added:
> > > http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.g
> > > it;a=commitdiff;h=2e77cd4e423967862ca01b1af82aa8b5b7429fc4;hp=aba002da
> > > 4c6e5efec4d43e1ce33930a79269349a
> > >
> > >
> > > http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.g
> > > it;a=commitdiff;h=b4ec8bfa750ef43a43c2da746c8afdbb51002882;hp=4f28b9a7
> > > 5c928f229443d7c6c3163159ceb6903a>
> > > >> Please keep proper attribution.
> > > >
> > > > Those patches are just for Chrome OS. Please post them if you want
> > > > for
> > >
> > > those
> > >
> > > > to be considered so that they can be reviewed.
> > >
> > > We intend to, once they are rebased onto latest kernel. But what I'm
> > > pointing out is that you're removing proper attribution from Chrome OS
> > > patches, and this is the second time it has happened.
> >
> > What is mean? does mainline kernel have the attribution? if not so, we
> > don't need to consider it. And please know that I can not be aware of
> > you have such patch set without any posting.
> >
>
> at·tri·bu·tion
> n.
> 1. The act of attributing, especially the act of establishing a particular
> person as the creator of a work of art
> [1]
>
> So yes, mainline kernel has attribution. Actually posting something as
> work of someone that is not the author of the posted work is considered
> bad everywhere, isn't it?
>
>
Hahaha, understood. there was my misunderstanding. :)



> However looking at those two patches linked by Stéphane, I'm not really
> sure this patch is really just a squash of them. Stéphane, are you 100%
> sure that your claims are true?
>
>
And Stéphane, when was the first time it had happened? I haven't the
slightest intention to do so. If happened, there might be my missing
something.

Thanks,
Inki Dae


> Best regards,
> Tomasz
>
> [1] http://www.thefreedictionary.com/attribution
>
> > > > That is why we attend open
> > > > source. One more comment, please do not abuse
> > > > exynos_drm_crtc_page_flip()>
> > > What do you mean by abuse?
> > >
> > > >> Signed-off-by: Inki Dae <inki.dae@samsung.com>
> > > >> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
> > > >> ---
> > > >>
> > > >>  drivers/gpu/drm/exynos/exynos_drm_crtc.c |   16 ++++++++++++++++
> > > >>  1 files changed, 16 insertions(+), 0 deletions(-)
> > > >>
> > > >> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> > > >> b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> > > >> index e8894bc..69a77e9 100644
> > > >> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> > > >> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> > > >> @@ -48,6 +48,8 @@ struct exynos_drm_crtc {
> > > >>
> > > >>         unsigned int                    pipe;
> > > >>         unsigned int                    dpms;
> > > >>         enum exynos_crtc_mode           mode;
> > > >>
> > > >> +       wait_queue_head_t               pending_flip_queue;
> > > >> +       atomic_t                        pending_flip;
> > > >>
> > > >>  };
> > > >>
> > > >>  static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
> > > >>
> > > >> @@ -61,6 +63,13 @@ static void exynos_drm_crtc_dpms(struct drm_crtc
> > >
> > > *crtc,
> > >
> > > >> int mode)
> > > >>
> > > >>                 return;
> > > >>
> > > >>         }
> > > >>
> > > >> +       if (mode > DRM_MODE_DPMS_ON) {
> > > >> +               /* wait for the completion of page flip. */
> > > >> +               wait_event(exynos_crtc->pending_flip_queue,
> > > >> +
> > > >> atomic_read(&exynos_crtc->pending_flip)
> > >
> > > ==
> > >
> > > >> 0);
> > > >> +               drm_vblank_off(crtc->dev, exynos_crtc->pipe);
> > > >>
> > > >> You should be using vblank_put/get.
> > > >
> > > > No, drm_vblank_put should be called by
> > > > exynos_drm_crtc_finish_pageflip(). And know that this patch makes
> > > > sure that pended page flip event is>
> > > completed
> > >
> > > > before dpms goes to off.
> > >
> > > You need to do vblank_put/get while you're waiting. Otherwise you
> > > don't know for sure that flips will happen. This is especially bad as
> > > you don't use a timeout.
> >
> > Understood. Right, drm_vblank_get call before wait_event and
> > drm_vblank_put call after wait_event.
> >
> > Thanks,
> > Inki Dae
> >
> > > Stéphane
> > >
> > > > Thanks,
> > > > Inki Dae
> > > >
> > > >> Stéphane
> > > >>
> > > >> > +       }
> > > >> > +
> > > >> >
> > > >> >         exynos_drm_fn_encoder(crtc, &mode,
> > > >> >
> > > >> > exynos_drm_encoder_crtc_dpms);
> > > >> >
> > > >> >         exynos_crtc->dpms = mode;
> > > >> >
> > > >> >  }
> > > >> >
> > > >> > @@ -225,6 +234,7 @@ static int exynos_drm_crtc_page_flip(struct
> > >
> > > drm_crtc
> > >
> > > >> > *crtc,
> > > >> >
> > > >> >                 spin_lock_irq(&dev->event_lock);
> > > >> >                 list_add_tail(&event->base.link,
> > > >> >
> > > >> >                                 &dev_priv->pageflip_event_list);
> > > >> >
> > > >> > +               atomic_set(&exynos_crtc->pending_flip, 1);
> > > >> >
> > > >> >                 spin_unlock_irq(&dev->event_lock);
> > > >> >
> > > >> >                 crtc->fb = fb;
> > > >> >
> > > >> > @@ -344,6 +354,8 @@ int exynos_drm_crtc_create(struct drm_device
> > > >> > *dev,
> > > >> > unsigned int nr)
> > > >> >
> > > >> >         exynos_crtc->pipe = nr;
> > > >> >         exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
> > > >> >
> > > >> > +       init_waitqueue_head(&exynos_crtc->pending_flip_queue);
> > > >> > +       atomic_set(&exynos_crtc->pending_flip, 0);
> > > >> >
> > > >> >         exynos_crtc->plane = exynos_plane_init(dev, 1 << nr,
> > > >> >         true);
> > > >> >         if (!exynos_crtc->plane) {
> > > >> >
> > > >> >                 kfree(exynos_crtc);
> > > >> >
> > > >> > @@ -398,6 +410,8 @@ void exynos_drm_crtc_finish_pageflip(struct
> > > >> > drm_device *dev, int crtc)
> > > >> >
> > > >> >  {
> > > >> >
> > > >> >         struct exynos_drm_private *dev_priv = dev->dev_private;
> > > >> >         struct drm_pending_vblank_event *e, *t;
> > > >> >
> > > >> > +       struct drm_crtc *drm_crtc = dev_priv->crtc[crtc];
> > > >> > +       struct exynos_drm_crtc *exynos_crtc =
> > >
> > > to_exynos_crtc(drm_crtc);
> > >
> > > >> >         struct timeval now;
> > > >> >         unsigned long flags;
> > > >> >
> > > >> > @@ -419,6 +433,8 @@ void exynos_drm_crtc_finish_pageflip(struct
> > > >> > drm_device *dev, int crtc)
> > > >> >
> > > >> >                 list_move_tail(&e->base.link,
> > > >> >
> > > >> > &e->base.file_priv->event_list);
> > > >> >
> > > >> >                 wake_up_interruptible(&e->base.file_priv->event_w
> > > >> >                 ait);
> > > >> >                 drm_vblank_put(dev, crtc);
> > > >> >
> > > >> > +               atomic_set(&exynos_crtc->pending_flip, 0);
> > > >> > +               wake_up(&exynos_crtc->pending_flip_queue);
> > > >> >
> > > >> >         }
> > > >> >
> > > >> >         spin_unlock_irqrestore(&dev->event_lock, flags);
> > > >> >
> > > >> > --
> > > >> > 1.7.5.4
> > > >> >
> > > >> > _______________________________________________
> > > >> > dri-devel mailing list
> > > >> > dri-devel@lists.freedesktop.org
> > > >> > http://lists.freedesktop.org/mailman/listinfo/dri-devel
> > > >>
> > > >> _______________________________________________
> > > >> dri-devel mailing list
> > > >> dri-devel@lists.freedesktop.org
> > > >> http://lists.freedesktop.org/mailman/listinfo/dri-devel
> > >
> > > _______________________________________________
> > > dri-devel mailing list
> > > dri-devel@lists.freedesktop.org
> > > http://lists.freedesktop.org/mailman/listinfo/dri-devel
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>

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Re: [PATCH] drm/exynos: wait for the completion of pending page flip

[Inki Dae]

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2013/5/22 Kyungmin Park <kmpark@infradead.org>

>
>
> On Wed, May 22, 2013 at 5:23 PM, Tomasz Figa <tomasz.figa@gmail.com>wrote:
>
>> Hi Inki,
>>
>> On Wednesday 22 of May 2013 15:37:14 Inki Dae wrote:
>> > 2013/5/22 Stéphane Marchesin <stephane.marchesin@gmail.com>
>> >
>> > > On Tue, May 21, 2013 at 9:22 PM, Inki Dae <inki.dae@samsung.com>
>> wrote:
>> > > > 2013/5/22 Stéphane Marchesin <stephane.marchesin@gmail.com>
>> > > >
>> > > >> On Tue, May 21, 2013 at 1:08 AM, Inki Dae <inki.dae@samsung.com>
>> wrote:
>> > > >> > This patch fixes the issue that drm_vblank_get() is failed.
>> > > >> >
>> > > >> > The issus occurs when next page flip request is tried
>> > > >> > if previous page flip event wasn't completed yet and then
>> > > >> > dpms became off.
>> > > >> >
>> > > >> > So this patch make sure that page flip event is completed
>> > > >> > before dpms goes to off.
>> > > >>
>> > > >> Hi,
>> > > >>
>> > > >> This patch is a squash of the two following patches from the Chrome
>> > > >> OS
>> > >
>> > > >> tree with the KDS bits removed and the dpms off bit added:
>> > >
>> http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.g
>> > > it;a=commitdiff;h=2e77cd4e423967862ca01b1af82aa8b5b7429fc4;hp=aba002da
>> > > 4c6e5efec4d43e1ce33930a79269349a
>> > >
>> > >
>> > >
>> http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-next.g
>> > > it;a=commitdiff;h=b4ec8bfa750ef43a43c2da746c8afdbb51002882;hp=4f28b9a7
>> > > 5c928f229443d7c6c3163159ceb6903a>
>> > > >> Please keep proper attribution.
>> > > >
>> > > > Those patches are just for Chrome OS. Please post them if you want
>> > > > for
>> > >
>> > > those
>> > >
>> > > > to be considered so that they can be reviewed.
>>
> Hi Stephane,
>
>>  > >
>> > > We intend to, once they are rebased onto latest kernel. But what I'm
>> > > pointing out is that you're removing proper attribution from Chrome OS
>> > > patches, and this is the second time it has happened.
>>
> First, we don't know what's going on Chrome OS. probably you think we
> refer your codes. but we don't know chrome codes and doesn't refer it. it's
> our finding from our use case.
> Second, samsung has lots of division. some engineers are working with
> Chrome OS. but ours is not their division.
> now we're working on anoter platform and use exynos drm.
> As you know "chinese wall". we're doing it properly.
>


Actually, we referred to i915 codes, intel_display.c :)


>
> Thank you,
> Kyungmin Park
>
>>  >
>> > What is mean? does mainline kernel have the attribution? if not so, we
>> > don't need to consider it. And please know that I can not be aware of
>> > you have such patch set without any posting.
>> >
>>
>> at·tri·bu·tion
>> n.
>> 1. The act of attributing, especially the act of establishing a particular
>> person as the creator of a work of art
>> [1]
>>
>> So yes, mainline kernel has attribution. Actually posting something as
>> work of someone that is not the author of the posted work is considered
>> bad everywhere, isn't it?
>>
>> However looking at those two patches linked by Stéphane, I'm not really
>> sure this patch is really just a squash of them. Stéphane, are you 100%
>> sure that your claims are true?
>>
>> Best regards,
>> Tomasz
>>
>> [1] http://www.thefreedictionary.com/attribution
>>
>> > > > That is why we attend open
>> > > > source. One more comment, please do not abuse
>> > > > exynos_drm_crtc_page_flip()>
>> > > What do you mean by abuse?
>> > >
>> > > >> Signed-off-by: Inki Dae <inki.dae@samsung.com>
>> > > >> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
>> > > >> ---
>> > > >>
>> > > >>  drivers/gpu/drm/exynos/exynos_drm_crtc.c |   16 ++++++++++++++++
>> > > >>  1 files changed, 16 insertions(+), 0 deletions(-)
>> > > >>
>> > > >> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
>> > > >> b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
>> > > >> index e8894bc..69a77e9 100644
>> > > >> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
>> > > >> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
>> > > >> @@ -48,6 +48,8 @@ struct exynos_drm_crtc {
>> > > >>
>> > > >>         unsigned int                    pipe;
>> > > >>         unsigned int                    dpms;
>> > > >>         enum exynos_crtc_mode           mode;
>> > > >>
>> > > >> +       wait_queue_head_t               pending_flip_queue;
>> > > >> +       atomic_t                        pending_flip;
>> > > >>
>> > > >>  };
>> > > >>
>> > > >>  static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
>> > > >>
>> > > >> @@ -61,6 +63,13 @@ static void exynos_drm_crtc_dpms(struct drm_crtc
>> > >
>> > > *crtc,
>> > >
>> > > >> int mode)
>> > > >>
>> > > >>                 return;
>> > > >>
>> > > >>         }
>> > > >>
>> > > >> +       if (mode > DRM_MODE_DPMS_ON) {
>> > > >> +               /* wait for the completion of page flip. */
>> > > >> +               wait_event(exynos_crtc->pending_flip_queue,
>> > > >> +
>> > > >> atomic_read(&exynos_crtc->pending_flip)
>> > >
>> > > ==
>> > >
>> > > >> 0);
>> > > >> +               drm_vblank_off(crtc->dev, exynos_crtc->pipe);
>> > > >>
>> > > >> You should be using vblank_put/get.
>> > > >
>> > > > No, drm_vblank_put should be called by
>> > > > exynos_drm_crtc_finish_pageflip(). And know that this patch makes
>> > > > sure that pended page flip event is>
>> > > completed
>> > >
>> > > > before dpms goes to off.
>> > >
>> > > You need to do vblank_put/get while you're waiting. Otherwise you
>> > > don't know for sure that flips will happen. This is especially bad as
>> > > you don't use a timeout.
>> >
>> > Understood. Right, drm_vblank_get call before wait_event and
>> > drm_vblank_put call after wait_event.
>> >
>> > Thanks,
>> > Inki Dae
>> >
>> > > Stéphane
>> > >
>> > > > Thanks,
>> > > > Inki Dae
>> > > >
>> > > >> Stéphane
>> > > >>
>> > > >> > +       }
>> > > >> > +
>> > > >> >
>> > > >> >         exynos_drm_fn_encoder(crtc, &mode,
>> > > >> >
>> > > >> > exynos_drm_encoder_crtc_dpms);
>> > > >> >
>> > > >> >         exynos_crtc->dpms = mode;
>> > > >> >
>> > > >> >  }
>> > > >> >
>> > > >> > @@ -225,6 +234,7 @@ static int exynos_drm_crtc_page_flip(struct
>> > >
>> > > drm_crtc
>> > >
>> > > >> > *crtc,
>> > > >> >
>> > > >> >                 spin_lock_irq(&dev->event_lock);
>> > > >> >                 list_add_tail(&event->base.link,
>> > > >> >
>> > > >> >                                 &dev_priv->pageflip_event_list);
>> > > >> >
>> > > >> > +               atomic_set(&exynos_crtc->pending_flip, 1);
>> > > >> >
>> > > >> >                 spin_unlock_irq(&dev->event_lock);
>> > > >> >
>> > > >> >                 crtc->fb = fb;
>> > > >> >
>> > > >> > @@ -344,6 +354,8 @@ int exynos_drm_crtc_create(struct drm_device
>> > > >> > *dev,
>> > > >> > unsigned int nr)
>> > > >> >
>> > > >> >         exynos_crtc->pipe = nr;
>> > > >> >         exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
>> > > >> >
>> > > >> > +       init_waitqueue_head(&exynos_crtc->pending_flip_queue);
>> > > >> > +       atomic_set(&exynos_crtc->pending_flip, 0);
>> > > >> >
>> > > >> >         exynos_crtc->plane = exynos_plane_init(dev, 1 << nr,
>> > > >> >         true);
>> > > >> >         if (!exynos_crtc->plane) {
>> > > >> >
>> > > >> >                 kfree(exynos_crtc);
>> > > >> >
>> > > >> > @@ -398,6 +410,8 @@ void exynos_drm_crtc_finish_pageflip(struct
>> > > >> > drm_device *dev, int crtc)
>> > > >> >
>> > > >> >  {
>> > > >> >
>> > > >> >         struct exynos_drm_private *dev_priv = dev->dev_private;
>> > > >> >         struct drm_pending_vblank_event *e, *t;
>> > > >> >
>> > > >> > +       struct drm_crtc *drm_crtc = dev_priv->crtc[crtc];
>> > > >> > +       struct exynos_drm_crtc *exynos_crtc =
>> > >
>> > > to_exynos_crtc(drm_crtc);
>> > >
>> > > >> >         struct timeval now;
>> > > >> >         unsigned long flags;
>> > > >> >
>> > > >> > @@ -419,6 +433,8 @@ void exynos_drm_crtc_finish_pageflip(struct
>> > > >> > drm_device *dev, int crtc)
>> > > >> >
>> > > >> >                 list_move_tail(&e->base.link,
>> > > >> >
>> > > >> > &e->base.file_priv->event_list);
>> > > >> >
>> > > >> >                 wake_up_interruptible(&e->base.file_priv->event_w
>> > > >> >                 ait);
>> > > >> >                 drm_vblank_put(dev, crtc);
>> > > >> >
>> > > >> > +               atomic_set(&exynos_crtc->pending_flip, 0);
>> > > >> > +               wake_up(&exynos_crtc->pending_flip_queue);
>> > > >> >
>> > > >> >         }
>> > > >> >
>> > > >> >         spin_unlock_irqrestore(&dev->event_lock, flags);
>> > > >> >
>> > > >> > --
>> > > >> > 1.7.5.4
>> > > >> >
>> > > >> > _______________________________________________
>> > > >> > dri-devel mailing list
>> > > >> > dri-devel@lists.freedesktop.org
>> > > >> > http://lists.freedesktop.org/mailman/listinfo/dri-devel
>> > > >>
>> > > >> _______________________________________________
>> > > >> dri-devel mailing list
>> > > >> dri-devel@lists.freedesktop.org
>> > > >> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>> > >
>> > > _______________________________________________
>> > > dri-devel mailing list
>> > > dri-devel@lists.freedesktop.org
>> > > http://lists.freedesktop.org/mailman/listinfo/dri-devel
>> _______________________________________________
>> dri-devel mailing list
>> dri-devel@lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>>
>
>
> _______________________________________________
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