[PATCH 00/11] drm/exynos: improve atomic modesetting

[PATCH 00/11] drm/exynos: improve atomic modesetting

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Hi,

This patchset adds a couple of changes to improve atomic modesetting:

 * add check for the START shadow register for FIMD to only finish the update
 when the screen was actually updated.
 * add asynchronous atomic commit, so now page flips can be run asynchronously.
 It also add infrastructure to serialize commits for the same CRTC and wait all
 plane updates to finish.
 * enable the DRIVER_ATOMIC feature to enable userspace to use atomic IOCTL with
 exynos.

Please review.

	Gustavo

---
Gustavo Padovan (11):
  drm/exynos: don't track enabled state at exynos_crtc
  drm/exynos: fimd: unify call to exynos_drm_crtc_finish_pageflip()
  drm/exynos: add prepare and cleanup phases for planes
  drm/exynos: fimd: move window protect code to prepare/cleanup_plane
  drm/exynos: check for pending fb before finish update
  drm/exynos: add macro to get the address of START_S reg
  drm/exynos: fimd: only finish update if START == START_S
  drm/exynos: add atomic asynchronous commit
  drm/exynos: wait all planes updates to finish
  drm/exynos: remove wait queue for pending page flip
  drm/exynos: Enable atomic modesetting feature

 drivers/gpu/drm/exynos/exynos5433_drm_decon.c |  10 +-
 drivers/gpu/drm/exynos/exynos7_drm_decon.c    |  10 +-
 drivers/gpu/drm/exynos/exynos_drm_crtc.c      |  69 +++++------
 drivers/gpu/drm/exynos/exynos_drm_crtc.h      |   4 +-
 drivers/gpu/drm/exynos/exynos_drm_drv.c       | 158 +++++++++++++++++++++++++-
 drivers/gpu/drm/exynos/exynos_drm_drv.h       |  24 +++-
 drivers/gpu/drm/exynos/exynos_drm_fb.c        |  35 ------
 drivers/gpu/drm/exynos/exynos_drm_fimd.c      |  81 ++++++++-----
 drivers/gpu/drm/exynos/exynos_drm_plane.c     |   2 +
 drivers/gpu/drm/exynos/exynos_drm_vidi.c      |  10 +-
 drivers/gpu/drm/exynos/exynos_mixer.c         |  10 +-
 include/video/samsung_fimd.h                  |   1 +
 12 files changed, 309 insertions(+), 105 deletions(-)

-- 
2.1.0

[PATCH 01/11] drm/exynos: don't track enabled state at exynos_crtc

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

struct drm_crtc already stores the enabled state of the crtc
thus we don't need to replicate enabled in exynos_drm_crtc.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
---
 drivers/gpu/drm/exynos/exynos_drm_crtc.c | 16 ----------------
 drivers/gpu/drm/exynos/exynos_drm_drv.h  |  1 -
 2 files changed, 17 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index b9b0e9c..5a19e16 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -25,14 +25,9 @@ static void exynos_drm_crtc_enable(struct drm_crtc *crtc)
 {
 	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 
-	if (exynos_crtc->enabled)
-		return;
-
 	if (exynos_crtc->ops->enable)
 		exynos_crtc->ops->enable(exynos_crtc);
 
-	exynos_crtc->enabled = true;
-
 	drm_crtc_vblank_on(crtc);
 }
 
@@ -40,9 +35,6 @@ static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
 {
 	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 
-	if (!exynos_crtc->enabled)
-		return;
-
 	/* wait for the completion of page flip. */
 	if (!wait_event_timeout(exynos_crtc->pending_flip_queue,
 				(exynos_crtc->event == NULL), HZ/20))
@@ -52,8 +44,6 @@ static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
 
 	if (exynos_crtc->ops->disable)
 		exynos_crtc->ops->disable(exynos_crtc);
-
-	exynos_crtc->enabled = false;
 }
 
 static bool
@@ -170,9 +160,6 @@ int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int pipe)
 	struct exynos_drm_crtc *exynos_crtc =
 		to_exynos_crtc(private->crtc[pipe]);
 
-	if (!exynos_crtc->enabled)
-		return -EPERM;
-
 	if (exynos_crtc->ops->enable_vblank)
 		return exynos_crtc->ops->enable_vblank(exynos_crtc);
 
@@ -185,9 +172,6 @@ void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int pipe)
 	struct exynos_drm_crtc *exynos_crtc =
 		to_exynos_crtc(private->crtc[pipe]);
 
-	if (!exynos_crtc->enabled)
-		return;
-
 	if (exynos_crtc->ops->disable_vblank)
 		exynos_crtc->ops->disable_vblank(exynos_crtc);
 }
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index 6b8a30f..a993aac 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -136,7 +136,6 @@ struct exynos_drm_crtc {
 	struct drm_crtc			base;
 	enum exynos_drm_output_type	type;
 	unsigned int			pipe;
-	bool				enabled;
 	wait_queue_head_t		pending_flip_queue;
 	struct drm_pending_vblank_event	*event;
 	const struct exynos_drm_crtc_ops	*ops;
-- 
2.1.0

[PATCH 02/11] drm/exynos: fimd: unify call to exynos_drm_crtc_finish_pageflip()

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Unify handling of finished plane update to prepare for a following patch
that will check for the START and START_S regs to really make sure that
the plane was updated.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
---
 drivers/gpu/drm/exynos/exynos_drm_fimd.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index 5def6bc..30c1409 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -896,15 +896,15 @@ static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
 	if (ctx->pipe < 0 || !ctx->drm_dev)
 		goto out;
 
-	if (ctx->i80_if) {
-		exynos_drm_crtc_finish_pageflip(ctx->crtc);
+	if (!ctx->i80_if)
+		drm_crtc_handle_vblank(&ctx->crtc->base);
+
+	exynos_drm_crtc_finish_pageflip(ctx->crtc);
 
+	if (ctx->i80_if) {
 		/* Exits triggering mode */
 		atomic_set(&ctx->triggering, 0);
 	} else {
-		drm_crtc_handle_vblank(&ctx->crtc->base);
-		exynos_drm_crtc_finish_pageflip(ctx->crtc);
-
 		/* set wait vsync event to zero and wake up queue. */
 		if (atomic_read(&ctx->wait_vsync_event)) {
 			atomic_set(&ctx->wait_vsync_event, 0);
-- 
2.1.0

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[PATCH 03/11] drm/exynos: add prepare and cleanup phases for planes

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

.prepare_plane() and .cleanup_plane() allows to perform extra operations
before and after the update of planes. For FIMD for example this will
be used to enable disable the shadow protection bit.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
---
 drivers/gpu/drm/exynos/exynos_drm_crtc.c | 19 +++++++++++++++++++
 drivers/gpu/drm/exynos/exynos_drm_drv.h  |  6 ++++++
 2 files changed, 25 insertions(+)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index 5a19e16..3a89fc9 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -72,15 +72,34 @@ exynos_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc)
 {
 	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+	struct drm_plane *plane;
 
 	if (crtc->state->event) {
 		WARN_ON(drm_crtc_vblank_get(crtc) != 0);
 		exynos_crtc->event = crtc->state->event;
 	}
+
+	drm_atomic_crtc_for_each_plane(plane, crtc) {
+		struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
+
+		if (exynos_crtc->ops->prepare_plane)
+			exynos_crtc->ops->prepare_plane(exynos_crtc,
+							exynos_plane);
+	}
 }
 
 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc)
 {
+	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+	struct drm_plane *plane;
+
+	drm_atomic_crtc_for_each_plane(plane, crtc) {
+		struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
+
+		if (exynos_crtc->ops->cleanup_plane)
+			exynos_crtc->ops->cleanup_plane(exynos_crtc,
+							exynos_plane);
+	}
 }
 
 static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index a993aac..9f2b5c9 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -87,6 +87,8 @@ struct exynos_drm_plane {
  * @disable_vblank: specific driver callback for disabling vblank interrupt.
  * @wait_for_vblank: wait for vblank interrupt to make sure that
  *	hardware overlay is updated.
+ * @prepare_plane: prepare a window to receive a update
+ * @cleanup_plane: mark the end of a window update
  * @update_plane: apply hardware specific overlay data to registers.
  * @disable_plane: disable hardware specific overlay.
  * @te_handler: trigger to transfer video image at the tearing effect
@@ -107,10 +109,14 @@ struct exynos_drm_crtc_ops {
 	int (*enable_vblank)(struct exynos_drm_crtc *crtc);
 	void (*disable_vblank)(struct exynos_drm_crtc *crtc);
 	void (*wait_for_vblank)(struct exynos_drm_crtc *crtc);
+	void (*prepare_plane)(struct exynos_drm_crtc *crtc,
+			      struct exynos_drm_plane *plane);
 	void (*update_plane)(struct exynos_drm_crtc *crtc,
 			     struct exynos_drm_plane *plane);
 	void (*disable_plane)(struct exynos_drm_crtc *crtc,
 			      struct exynos_drm_plane *plane);
+	void (*cleanup_plane)(struct exynos_drm_crtc *crtc,
+			      struct exynos_drm_plane *plane);
 	void (*te_handler)(struct exynos_drm_crtc *crtc);
 	void (*clock_enable)(struct exynos_drm_crtc *crtc, bool enable);
 };
-- 
2.1.0

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Re: [PATCH 03/11] drm/exynos: add prepare and cleanup phases for planes

[Inki Dae]

On 2015년 08월 16일 01:26, Gustavo Padovan wrote:
> From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
> 
> .prepare_plane() and .cleanup_plane() allows to perform extra operations
> before and after the update of planes. For FIMD for example this will
> be used to enable disable the shadow protection bit.
> 
> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
> ---
>  drivers/gpu/drm/exynos/exynos_drm_crtc.c | 19 +++++++++++++++++++
>  drivers/gpu/drm/exynos/exynos_drm_drv.h  |  6 ++++++
>  2 files changed, 25 insertions(+)
> 
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> index 5a19e16..3a89fc9 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> @@ -72,15 +72,34 @@ exynos_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
>  static void exynos_crtc_atomic_begin(struct drm_crtc *crtc)
>  {
>  	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
> +	struct drm_plane *plane;
>  
>  	if (crtc->state->event) {
>  		WARN_ON(drm_crtc_vblank_get(crtc) != 0);
>  		exynos_crtc->event = crtc->state->event;
>  	}
> +
> +	drm_atomic_crtc_for_each_plane(plane, crtc) {
> +		struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
> +
> +		if (exynos_crtc->ops->prepare_plane)
> +			exynos_crtc->ops->prepare_plane(exynos_crtc,
> +							exynos_plane);

There is no any reason to use prepare_plane/cleanup_plane callback
names. How about using atomic_begin/atomic_flush callback names instead
for consistency between framework and device drivers?

Thanks,
Inki Dae

> +	}
>  }
>  
>  static void exynos_crtc_atomic_flush(struct drm_crtc *crtc)
>  {
> +	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
> +	struct drm_plane *plane;
> +
> +	drm_atomic_crtc_for_each_plane(plane, crtc) {
> +		struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
> +
> +		if (exynos_crtc->ops->cleanup_plane)
> +			exynos_crtc->ops->cleanup_plane(exynos_crtc,
> +							exynos_plane);
> +	}
>  }
>  
>  static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
> index a993aac..9f2b5c9 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
> +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
> @@ -87,6 +87,8 @@ struct exynos_drm_plane {
>   * @disable_vblank: specific driver callback for disabling vblank interrupt.
>   * @wait_for_vblank: wait for vblank interrupt to make sure that
>   *	hardware overlay is updated.
> + * @prepare_plane: prepare a window to receive a update
> + * @cleanup_plane: mark the end of a window update
>   * @update_plane: apply hardware specific overlay data to registers.
>   * @disable_plane: disable hardware specific overlay.
>   * @te_handler: trigger to transfer video image at the tearing effect
> @@ -107,10 +109,14 @@ struct exynos_drm_crtc_ops {
>  	int (*enable_vblank)(struct exynos_drm_crtc *crtc);
>  	void (*disable_vblank)(struct exynos_drm_crtc *crtc);
>  	void (*wait_for_vblank)(struct exynos_drm_crtc *crtc);
> +	void (*prepare_plane)(struct exynos_drm_crtc *crtc,
> +			      struct exynos_drm_plane *plane);
>  	void (*update_plane)(struct exynos_drm_crtc *crtc,
>  			     struct exynos_drm_plane *plane);
>  	void (*disable_plane)(struct exynos_drm_crtc *crtc,
>  			      struct exynos_drm_plane *plane);
> +	void (*cleanup_plane)(struct exynos_drm_crtc *crtc,
> +			      struct exynos_drm_plane *plane);
>  	void (*te_handler)(struct exynos_drm_crtc *crtc);
>  	void (*clock_enable)(struct exynos_drm_crtc *crtc, bool enable);
>  };
> 

Re: [PATCH 03/11] drm/exynos: add prepare and cleanup phases for planes

[Gustavo Padovan]

Hi Inki,

2015-08-24 Inki Dae <inki.dae@samsung.com>:

> On 2015년 08월 16일 01:26, Gustavo Padovan wrote:
> > From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
> >
> > .prepare_plane() and .cleanup_plane() allows to perform extra operations
> > before and after the update of planes. For FIMD for example this will
> > be used to enable disable the shadow protection bit.
> >
> > Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
> > ---
> >  drivers/gpu/drm/exynos/exynos_drm_crtc.c | 19 +++++++++++++++++++
> >  drivers/gpu/drm/exynos/exynos_drm_drv.h  |  6 ++++++
> >  2 files changed, 25 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> > index 5a19e16..3a89fc9 100644
> > --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> > +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> > @@ -72,15 +72,34 @@ exynos_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
> >  static void exynos_crtc_atomic_begin(struct drm_crtc *crtc)
> >  {
> >  	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
> > +	struct drm_plane *plane;
> >
> >  	if (crtc->state->event) {
> >  		WARN_ON(drm_crtc_vblank_get(crtc) != 0);
> >  		exynos_crtc->event = crtc->state->event;
> >  	}
> > +
> > +	drm_atomic_crtc_for_each_plane(plane, crtc) {
> > +		struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
> > +
> > +		if (exynos_crtc->ops->prepare_plane)
> > +			exynos_crtc->ops->prepare_plane(exynos_crtc,
> > +							exynos_plane);
> 
> There is no any reason to use prepare_plane/cleanup_plane callback
> names. How about using atomic_begin/atomic_flush callback names instead
> for consistency between framework and device drivers?

Either names are fine for me. So let's go with atomic_begin/flush. I'll
send an updated patchset.

	Gustavo

Re: [PATCH 03/11] drm/exynos: add prepare and cleanup phases for planes

[Inki Dae]

On 2015년 08월 27일 00:45, Gustavo Padovan wrote:
> Hi Inki,
> 
> 2015-08-24 Inki Dae <inki.dae@samsung.com>:
> 
>> On 2015년 08월 16일 01:26, Gustavo Padovan wrote:
>>> From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
>>>
>>> .prepare_plane() and .cleanup_plane() allows to perform extra operations
>>> before and after the update of planes. For FIMD for example this will
>>> be used to enable disable the shadow protection bit.
>>>
>>> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
>>> ---
>>>  drivers/gpu/drm/exynos/exynos_drm_crtc.c | 19 +++++++++++++++++++
>>>  drivers/gpu/drm/exynos/exynos_drm_drv.h  |  6 ++++++
>>>  2 files changed, 25 insertions(+)
>>>
>>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
>>> index 5a19e16..3a89fc9 100644
>>> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
>>> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
>>> @@ -72,15 +72,34 @@ exynos_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
>>>  static void exynos_crtc_atomic_begin(struct drm_crtc *crtc)
>>>  {
>>>  	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
>>> +	struct drm_plane *plane;
>>>
>>>  	if (crtc->state->event) {
>>>  		WARN_ON(drm_crtc_vblank_get(crtc) != 0);
>>>  		exynos_crtc->event = crtc->state->event;
>>>  	}
>>> +
>>> +	drm_atomic_crtc_for_each_plane(plane, crtc) {
>>> +		struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
>>> +
>>> +		if (exynos_crtc->ops->prepare_plane)
>>> +			exynos_crtc->ops->prepare_plane(exynos_crtc,
>>> +							exynos_plane);
>>
>> There is no any reason to use prepare_plane/cleanup_plane callback
>> names. How about using atomic_begin/atomic_flush callback names instead
>> for consistency between framework and device drivers?
> 
> Either names are fine for me. So let's go with atomic_begin/flush. I'll
> send an updated patchset.

Merged.

Thanks,
Inki Dae

> 
> 	Gustavo
> 

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[PATCH 04/11] drm/exynos: fimd: move window protect code to prepare/cleanup_plane

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Only set/clear the update bit in the CRTC's .atomic_begin()/flush()
so all planes are really committed at the same time.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
---
 drivers/gpu/drm/exynos/exynos_drm_fimd.c | 57 +++++++++++++++++++-------------
 1 file changed, 34 insertions(+), 23 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index 30c1409..48d4fbe 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -591,6 +591,16 @@ static void fimd_shadow_protect_win(struct fimd_context *ctx,
 {
 	u32 reg, bits, val;
 
+	/*
+	 * SHADOWCON/PRTCON register is used for enabling timing.
+	 *
+	 * for example, once only width value of a register is set,
+	 * if the dma is started then fimd hardware could malfunction so
+	 * with protect window setting, the register fields with prefix '_F'
+	 * wouldn't be updated at vsync also but updated once unprotect window
+	 * is set.
+	 */
+
 	if (ctx->driver_data->has_shadowcon) {
 		reg = SHADOWCON;
 		bits = SHADOWCON_WINx_PROTECT(win);
@@ -607,6 +617,28 @@ static void fimd_shadow_protect_win(struct fimd_context *ctx,
 	writel(val, ctx->regs + reg);
 }
 
+static void fimd_prepare_plane(struct exynos_drm_crtc *crtc,
+			       struct exynos_drm_plane *plane)
+{
+	struct fimd_context *ctx = crtc->ctx;
+
+	if (ctx->suspended)
+		return;
+
+	fimd_shadow_protect_win(ctx, plane->zpos, true);
+}
+
+static void fimd_cleanup_plane(struct exynos_drm_crtc *crtc,
+			       struct exynos_drm_plane *plane)
+{
+	struct fimd_context *ctx = crtc->ctx;
+
+	if (ctx->suspended)
+		return;
+
+	fimd_shadow_protect_win(ctx, plane->zpos, false);
+}
+
 static void fimd_update_plane(struct exynos_drm_crtc *crtc,
 			      struct exynos_drm_plane *plane)
 {
@@ -622,20 +654,6 @@ static void fimd_update_plane(struct exynos_drm_crtc *crtc,
 	if (ctx->suspended)
 		return;
 
-	/*
-	 * SHADOWCON/PRTCON register is used for enabling timing.
-	 *
-	 * for example, once only width value of a register is set,
-	 * if the dma is started then fimd hardware could malfunction so
-	 * with protect window setting, the register fields with prefix '_F'
-	 * wouldn't be updated at vsync also but updated once unprotect window
-	 * is set.
-	 */
-
-	/* protect windows */
-	fimd_shadow_protect_win(ctx, win, true);
-
-
 	offset = plane->src_x * bpp;
 	offset += plane->src_y * pitch;
 
@@ -707,9 +725,6 @@ static void fimd_update_plane(struct exynos_drm_crtc *crtc,
 	if (ctx->driver_data->has_shadowcon)
 		fimd_enable_shadow_channel_path(ctx, win, true);
 
-	/* Enable DMA channel and unprotect windows */
-	fimd_shadow_protect_win(ctx, win, false);
-
 	if (ctx->i80_if)
 		atomic_set(&ctx->win_updated, 1);
 }
@@ -723,16 +738,10 @@ static void fimd_disable_plane(struct exynos_drm_crtc *crtc,
 	if (ctx->suspended)
 		return;
 
-	/* protect windows */
-	fimd_shadow_protect_win(ctx, win, true);
-
 	fimd_enable_video_output(ctx, win, false);
 
 	if (ctx->driver_data->has_shadowcon)
 		fimd_enable_shadow_channel_path(ctx, win, false);
-
-	/* unprotect windows */
-	fimd_shadow_protect_win(ctx, win, false);
 }
 
 static void fimd_enable(struct exynos_drm_crtc *crtc)
@@ -875,8 +884,10 @@ static const struct exynos_drm_crtc_ops fimd_crtc_ops = {
 	.enable_vblank = fimd_enable_vblank,
 	.disable_vblank = fimd_disable_vblank,
 	.wait_for_vblank = fimd_wait_for_vblank,
+	.prepare_plane = fimd_prepare_plane,
 	.update_plane = fimd_update_plane,
 	.disable_plane = fimd_disable_plane,
+	.cleanup_plane = fimd_cleanup_plane,
 	.te_handler = fimd_te_handler,
 	.clock_enable = fimd_dp_clock_enable,
 };
-- 
2.1.0

[PATCH 05/11] drm/exynos: check for pending fb before finish update

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

The current code was ignoring the end of update for all overlay planes,
caring only for the primary plane update in case of pageflip.

This change adds a change to start to check for pending updates for all
planes through exynos_plane->pending_fb. At the start of plane update the
pending_fb is set with the fb to be shown on the screen. Then only when to
fb is already presented in the screen we set pending_fb to NULL to
signal that the update was finished.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

fixup! drm/exynos: check for pending fb before finish update
---
 drivers/gpu/drm/exynos/exynos5433_drm_decon.c | 10 +++++++++-
 drivers/gpu/drm/exynos/exynos7_drm_decon.c    | 10 +++++++++-
 drivers/gpu/drm/exynos/exynos_drm_crtc.c      |  7 ++++---
 drivers/gpu/drm/exynos/exynos_drm_crtc.h      |  3 ++-
 drivers/gpu/drm/exynos/exynos_drm_drv.h       |  1 +
 drivers/gpu/drm/exynos/exynos_drm_fimd.c      | 10 +++++++++-
 drivers/gpu/drm/exynos/exynos_drm_plane.c     |  2 ++
 drivers/gpu/drm/exynos/exynos_drm_vidi.c      | 10 +++++++++-
 drivers/gpu/drm/exynos/exynos_mixer.c         | 10 +++++++++-
 9 files changed, 54 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
index 484e312..8d65e45 100644
--- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
+++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
@@ -542,13 +542,21 @@ static irqreturn_t decon_lcd_sys_irq_handler(int irq, void *dev_id)
 {
 	struct decon_context *ctx = dev_id;
 	u32 val;
+	int win;
 
 	if (!test_bit(BIT_CLKS_ENABLED, &ctx->enabled))
 		goto out;
 
 	val = readl(ctx->addr + DECON_VIDINTCON1);
 	if (val & VIDINTCON1_INTFRMDONEPEND) {
-		exynos_drm_crtc_finish_pageflip(ctx->crtc);
+		for (win = 0 ; win < WINDOWS_NR ; win++) {
+			struct exynos_drm_plane *plane = &ctx->planes[win];
+
+			if (!plane->pending_fb)
+				continue;
+
+			exynos_drm_crtc_finish_update(ctx->crtc, plane);
+		}
 
 		/* clear */
 		writel(VIDINTCON1_INTFRMDONEPEND,
diff --git a/drivers/gpu/drm/exynos/exynos7_drm_decon.c b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
index 0792654..7651499 100644
--- a/drivers/gpu/drm/exynos/exynos7_drm_decon.c
+++ b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
@@ -623,6 +623,7 @@ static irqreturn_t decon_irq_handler(int irq, void *dev_id)
 {
 	struct decon_context *ctx = (struct decon_context *)dev_id;
 	u32 val, clear_bit;
+	int win;
 
 	val = readl(ctx->regs + VIDINTCON1);
 
@@ -636,7 +637,14 @@ static irqreturn_t decon_irq_handler(int irq, void *dev_id)
 
 	if (!ctx->i80_if) {
 		drm_crtc_handle_vblank(&ctx->crtc->base);
-		exynos_drm_crtc_finish_pageflip(ctx->crtc);
+		for (win = 0 ; win < WINDOWS_NR ; win++) {
+			struct exynos_drm_plane *plane = &ctx->planes[win];
+
+			if (!plane->pending_fb)
+				continue;
+
+			exynos_drm_crtc_finish_update(ctx->crtc, plane);
+		}
 
 		/* set wait vsync event to zero and wake up queue. */
 		if (atomic_read(&ctx->wait_vsync_event)) {
diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index 3a89fc9..7a2ad3e 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -195,18 +195,19 @@ void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int pipe)
 		exynos_crtc->ops->disable_vblank(exynos_crtc);
 }
 
-void exynos_drm_crtc_finish_pageflip(struct exynos_drm_crtc *exynos_crtc)
+void exynos_drm_crtc_finish_update(struct exynos_drm_crtc *exynos_crtc,
+				struct exynos_drm_plane *exynos_plane)
 {
 	struct drm_crtc *crtc = &exynos_crtc->base;
 	unsigned long flags;
 
+	exynos_plane->pending_fb = NULL;
+
 	spin_lock_irqsave(&crtc->dev->event_lock, flags);
 	if (exynos_crtc->event) {
-
 		drm_crtc_send_vblank_event(crtc, exynos_crtc->event);
 		drm_crtc_vblank_put(crtc);
 		wake_up(&exynos_crtc->pending_flip_queue);
-
 	}
 
 	exynos_crtc->event = NULL;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.h b/drivers/gpu/drm/exynos/exynos_drm_crtc.h
index 9e7027d..8bedfde 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.h
@@ -25,7 +25,8 @@ struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 					void *context);
 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int pipe);
 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int pipe);
-void exynos_drm_crtc_finish_pageflip(struct exynos_drm_crtc *exynos_crtc);
+void exynos_drm_crtc_finish_update(struct exynos_drm_crtc *exynos_crtc,
+				   struct exynos_drm_plane *exynos_plane);
 void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb);
 
 /* This function gets pipe value to crtc device matched with out_type. */
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index 9f2b5c9..de10cd1 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -74,6 +74,7 @@ struct exynos_drm_plane {
 	unsigned int v_ratio;
 	dma_addr_t dma_addr[MAX_FB_BUFFER];
 	unsigned int zpos;
+	struct drm_framebuffer *pending_fb;
 };
 
 /*
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index 48d4fbe..d41aa6a 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -896,6 +896,7 @@ static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
 {
 	struct fimd_context *ctx = (struct fimd_context *)dev_id;
 	u32 val, clear_bit;
+	int win;
 
 	val = readl(ctx->regs + VIDINTCON1);
 
@@ -910,7 +911,14 @@ static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
 	if (!ctx->i80_if)
 		drm_crtc_handle_vblank(&ctx->crtc->base);
 
-	exynos_drm_crtc_finish_pageflip(ctx->crtc);
+	for (win = 0 ; win < WINDOWS_NR ; win++) {
+		struct exynos_drm_plane *plane = &ctx->planes[win];
+
+		if (!plane->pending_fb)
+			continue;
+
+		exynos_drm_crtc_finish_update(ctx->crtc, plane);
+	}
 
 	if (ctx->i80_if) {
 		/* Exits triggering mode */
diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c b/drivers/gpu/drm/exynos/exynos_drm_plane.c
index bebc957..909fc8b 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_plane.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
@@ -168,6 +168,8 @@ static void exynos_plane_atomic_update(struct drm_plane *plane,
 			      state->src_x >> 16, state->src_y >> 16,
 			      state->src_w >> 16, state->src_h >> 16);
 
+	exynos_plane->pending_fb = state->fb;
+
 	if (exynos_crtc->ops->update_plane)
 		exynos_crtc->ops->update_plane(exynos_crtc, exynos_plane);
 }
diff --git a/drivers/gpu/drm/exynos/exynos_drm_vidi.c b/drivers/gpu/drm/exynos/exynos_drm_vidi.c
index 581af35..b6d00dd 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_vidi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_vidi.c
@@ -179,6 +179,7 @@ static void vidi_fake_vblank_handler(struct work_struct *work)
 {
 	struct vidi_context *ctx = container_of(work, struct vidi_context,
 					work);
+	int win;
 
 	if (ctx->pipe < 0)
 		return;
@@ -197,7 +198,14 @@ static void vidi_fake_vblank_handler(struct work_struct *work)
 
 	mutex_unlock(&ctx->lock);
 
-	exynos_drm_crtc_finish_pageflip(ctx->crtc);
+	for (win = 0 ; win < WINDOWS_NR ; win++) {
+		struct exynos_drm_plane *plane = &ctx->planes[win];
+
+		if (!plane->pending_fb)
+			continue;
+
+		exynos_drm_crtc_finish_update(ctx->crtc, plane);
+	}
 }
 
 static int vidi_show_connection(struct device *dev,
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index e68340c..d7e7811 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -716,6 +716,7 @@ static irqreturn_t mixer_irq_handler(int irq, void *arg)
 	struct mixer_context *ctx = arg;
 	struct mixer_resources *res = &ctx->mixer_res;
 	u32 val, base, shadow;
+	int win;
 
 	spin_lock(&res->reg_slock);
 
@@ -742,7 +743,14 @@ static irqreturn_t mixer_irq_handler(int irq, void *arg)
 		}
 
 		drm_crtc_handle_vblank(&ctx->crtc->base);
-		exynos_drm_crtc_finish_pageflip(ctx->crtc);
+		for (win = 0 ; win < MIXER_WIN_NR ; win++) {
+			struct exynos_drm_plane *plane = &ctx->planes[win];
+
+			if (!plane->pending_fb)
+				continue;
+
+			exynos_drm_crtc_finish_update(ctx->crtc, plane);
+		}
 
 		/* set wait vsync event to zero and wake up queue. */
 		if (atomic_read(&ctx->wait_vsync_event)) {
-- 
2.1.0

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

[PATCH 06/11] drm/exynos: add macro to get the address of START_S reg

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

This macro is need to get the value of the START shadow register, that
will tell if an framebuffer is currently displayed on the screen or not.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
---
 include/video/samsung_fimd.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/video/samsung_fimd.h b/include/video/samsung_fimd.h
index 0530e5a..d8fc96e 100644
--- a/include/video/samsung_fimd.h
+++ b/include/video/samsung_fimd.h
@@ -296,6 +296,7 @@
 
 /* Video buffer addresses */
 #define VIDW_BUF_START(_buff)			(0xA0 + ((_buff) * 8))
+#define VIDW_BUF_START_S(_buff)			(0x40A0 + ((_buff) * 8))
 #define VIDW_BUF_START1(_buff)			(0xA4 + ((_buff) * 8))
 #define VIDW_BUF_END(_buff)			(0xD0 + ((_buff) * 8))
 #define VIDW_BUF_END1(_buff)			(0xD4 + ((_buff) * 8))
-- 
2.1.0

[PATCH 07/11] drm/exynos: fimd: only finish update if START == START_S

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

fimd_update_plane() programs BUF_START[win] and during the update
BUF_START[win] is copied to BUF_START_S[win] (its shadow register)
and starts scanning out, then it raises a irq.

The fimd_irq_handler, in the case we have a pending_fb, will check
the fb value was copied to START_S register and finish the update
in case of success.

Based on patch from Daniel Kurtz <djkurtz@chromium.org>

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
---
 drivers/gpu/drm/exynos/exynos_drm_fimd.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index d41aa6a..c87b791 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -59,6 +59,7 @@
 #define VIDWnALPHA1(win)	(VIDW_ALPHA + 0x04 + (win) * 8)
 
 #define VIDWx_BUF_START(win, buf)	(VIDW_BUF_START(buf) + (win) * 8)
+#define VIDWx_BUF_START_S(win, buf)	(VIDW_BUF_START_S(buf) + (win) * 8)
 #define VIDWx_BUF_END(win, buf)		(VIDW_BUF_END(buf) + (win) * 8)
 #define VIDWx_BUF_SIZE(win, buf)	(VIDW_BUF_SIZE(buf) + (win) * 4)
 
@@ -895,7 +896,7 @@ static const struct exynos_drm_crtc_ops fimd_crtc_ops = {
 static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
 {
 	struct fimd_context *ctx = (struct fimd_context *)dev_id;
-	u32 val, clear_bit;
+	u32 val, clear_bit, start, start_s;
 	int win;
 
 	val = readl(ctx->regs + VIDINTCON1);
@@ -917,7 +918,10 @@ static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
 		if (!plane->pending_fb)
 			continue;
 
-		exynos_drm_crtc_finish_update(ctx->crtc, plane);
+		start = readl(ctx->regs + VIDWx_BUF_START(win, 0));
+		start_s = readl(ctx->regs + VIDWx_BUF_START_S(win, 0));
+		if (start == start_s)
+			exynos_drm_crtc_finish_update(ctx->crtc, plane);
 	}
 
 	if (ctx->i80_if) {
-- 
2.1.0

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[PATCH 08/11] drm/exynos: add atomic asynchronous commit

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

The atomic modesetting interfaces supports async commits that should be
implemented by the drivers. If drm core requests an async commit
exynos_atomic_commit() will now schedule a work task to run the update later.

It also serializes commits that needs to run on the same crtc, putting the
following commit to wait until the current one is finished.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
---
 drivers/gpu/drm/exynos/exynos_drm_drv.c | 113 ++++++++++++++++++++++++++++++++
 drivers/gpu/drm/exynos/exynos_drm_drv.h |  11 ++++
 drivers/gpu/drm/exynos/exynos_drm_fb.c  |  35 ----------
 3 files changed, 124 insertions(+), 35 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index e8db234..a4937b5 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -13,6 +13,8 @@
 
 #include <linux/pm_runtime.h>
 #include <drm/drmP.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc_helper.h>
 
 #include <linux/component.h>
@@ -37,6 +39,56 @@
 #define DRIVER_MAJOR	1
 #define DRIVER_MINOR	0
 
+struct exynos_atomic_commit {
+	struct work_struct	work;
+	struct drm_device	*dev;
+	struct drm_atomic_state *state;
+	u32			crtcs;
+};
+
+static void exynos_atomic_commit_complete(struct exynos_atomic_commit *commit)
+{
+	struct drm_device *dev = commit->dev;
+	struct exynos_drm_private *priv = dev->dev_private;
+	struct drm_atomic_state *state = commit->state;
+
+	drm_atomic_helper_commit_modeset_disables(dev, state);
+
+	drm_atomic_helper_commit_modeset_enables(dev, state);
+
+	/*
+	 * Exynos can't update planes with CRTCs and encoders disabled,
+	 * its updates routines, specially for FIMD, requires the clocks
+	 * to be enabled. So it is necessary to handle the modeset operations
+	 * *before* the commit_planes() step, this way it will always
+	 * have the relevant clocks enabled to perform the update.
+	 */
+
+	drm_atomic_helper_commit_planes(dev, state);
+
+	drm_atomic_helper_wait_for_vblanks(dev, state);
+
+	drm_atomic_helper_cleanup_planes(dev, state);
+
+	drm_atomic_state_free(state);
+
+	spin_lock(&priv->lock);
+	priv->pending &= ~commit->crtcs;
+	spin_unlock(&priv->lock);
+
+	wake_up_all(&priv->wait);
+
+	kfree(commit);
+}
+
+static void exynos_drm_atomic_work(struct work_struct *work)
+{
+	struct exynos_atomic_commit *commit = container_of(work,
+				struct exynos_atomic_commit, work);
+
+	exynos_atomic_commit_complete(commit);
+}
+
 static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
 {
 	struct exynos_drm_private *private;
@@ -48,6 +100,9 @@ static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
 	if (!private)
 		return -ENOMEM;
 
+	init_waitqueue_head(&private->wait);
+	spin_lock_init(&private->lock);
+
 	dev_set_drvdata(dev->dev, dev);
 	dev->dev_private = (void *)private;
 
@@ -150,6 +205,64 @@ static int exynos_drm_unload(struct drm_device *dev)
 	return 0;
 }
 
+static int commit_is_pending(struct exynos_drm_private *priv, u32 crtcs)
+{
+	bool pending;
+
+	spin_lock(&priv->lock);
+	pending = priv->pending & crtcs;
+	spin_unlock(&priv->lock);
+
+	return pending;
+}
+
+int exynos_atomic_commit(struct drm_device *dev, struct drm_atomic_state *state,
+			 bool async)
+{
+	struct exynos_drm_private *priv = dev->dev_private;
+	struct exynos_atomic_commit *commit;
+	int i, ret;
+
+	commit = kzalloc(sizeof(*commit), GFP_KERNEL);
+	if (!commit)
+		return -ENOMEM;
+
+	ret = drm_atomic_helper_prepare_planes(dev, state);
+	if (ret) {
+		kfree(commit);
+		return ret;
+	}
+
+	/* This is the point of no return */
+
+	INIT_WORK(&commit->work, exynos_drm_atomic_work);
+	commit->dev = dev;
+	commit->state = state;
+
+	/* Wait until all affected CRTCs have completed previous commits and
+	 * mark them as pending.
+	 */
+	for (i = 0; i < dev->mode_config.num_crtc; ++i) {
+		if (state->crtcs[i])
+			commit->crtcs |= 1 << drm_crtc_index(state->crtcs[i]);
+	}
+
+	wait_event(priv->wait, !commit_is_pending(priv, commit->crtcs));
+
+	spin_lock(&priv->lock);
+	priv->pending |= commit->crtcs;
+	spin_unlock(&priv->lock);
+
+	drm_atomic_helper_swap_state(dev, state);
+
+	if (async)
+		schedule_work(&commit->work);
+	else
+		exynos_atomic_commit_complete(commit);
+
+	return 0;
+}
+
 static int exynos_drm_suspend(struct drm_device *dev, pm_message_t state)
 {
 	struct drm_connector *connector;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index de10cd1..406b278 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -170,6 +170,9 @@ struct drm_exynos_file_private {
  * @da_space_size: size of device address space.
  *	if 0 then default value is used for it.
  * @pipe: the pipe number for this crtc/manager.
+ * @pending: the crtcs that have pending updates to finish
+ * @lock: protect access to @pending
+ * @wait: wait an atomic commit to finish
  */
 struct exynos_drm_private {
 	struct drm_fb_helper *fb_helper;
@@ -185,6 +188,11 @@ struct exynos_drm_private {
 	unsigned long da_space_size;
 
 	unsigned int pipe;
+
+	/* for atomic commit */
+	u32			pending;
+	spinlock_t		lock;
+	wait_queue_head_t	wait;
 };
 
 /*
@@ -243,6 +251,9 @@ static inline int exynos_dpi_bind(struct drm_device *dev,
 }
 #endif
 
+int exynos_atomic_commit(struct drm_device *dev, struct drm_atomic_state *state,
+			 bool async);
+
 
 extern struct platform_driver fimd_driver;
 extern struct platform_driver exynos5433_decon_driver;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c b/drivers/gpu/drm/exynos/exynos_drm_fb.c
index 2b6320e..edaccfb 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fb.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c
@@ -267,41 +267,6 @@ static void exynos_drm_output_poll_changed(struct drm_device *dev)
 		exynos_drm_fbdev_init(dev);
 }
 
-static int exynos_atomic_commit(struct drm_device *dev,
-				struct drm_atomic_state *state,
-				bool async)
-{
-	int ret;
-
-	ret = drm_atomic_helper_prepare_planes(dev, state);
-	if (ret)
-		return ret;
-
-	/* This is the point of no return */
-
-	drm_atomic_helper_swap_state(dev, state);
-
-	drm_atomic_helper_commit_modeset_disables(dev, state);
-
-	drm_atomic_helper_commit_modeset_enables(dev, state);
-
-	/*
-	 * Exynos can't update planes with CRTCs and encoders disabled,
-	 * its updates routines, specially for FIMD, requires the clocks
-	 * to be enabled. So it is necessary to handle the modeset operations
-	 * *before* the commit_planes() step, this way it will always
-	 * have the relevant clocks enabled to perform the update.
-	 */
-
-	drm_atomic_helper_commit_planes(dev, state);
-
-	drm_atomic_helper_cleanup_planes(dev, state);
-
-	drm_atomic_state_free(state);
-
-	return 0;
-}
-
 static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
 	.fb_create = exynos_user_fb_create,
 	.output_poll_changed = exynos_drm_output_poll_changed,
-- 
2.1.0

[PATCH 09/11] drm/exynos: wait all planes updates to finish

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Add infrastructure to wait for all planes updates to finish by using
an atomic_t variable to track how many pending updates we are waiting
plus a wait_queue for the wait part.

It also changes vblank behaviour and keeps it enabled for all types
of updates

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
---
 drivers/gpu/drm/exynos/exynos_drm_crtc.c | 18 +++++++++----
 drivers/gpu/drm/exynos/exynos_drm_crtc.h |  1 +
 drivers/gpu/drm/exynos/exynos_drm_drv.c  | 44 +++++++++++++++++++++++++++++++-
 drivers/gpu/drm/exynos/exynos_drm_drv.h  |  4 +++
 4 files changed, 61 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index 7a2ad3e..049ab67 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -74,10 +74,7 @@ static void exynos_crtc_atomic_begin(struct drm_crtc *crtc)
 	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 	struct drm_plane *plane;
 
-	if (crtc->state->event) {
-		WARN_ON(drm_crtc_vblank_get(crtc) != 0);
-		exynos_crtc->event = crtc->state->event;
-	}
+	exynos_crtc->event = crtc->state->event;
 
 	drm_atomic_crtc_for_each_plane(plane, crtc) {
 		struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
@@ -154,6 +151,8 @@ struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 	exynos_crtc->ops = ops;
 	exynos_crtc->ctx = ctx;
 
+	init_waitqueue_head(&exynos_crtc->wait_update);
+
 	crtc = &exynos_crtc->base;
 
 	private->crtc[pipe] = crtc;
@@ -195,6 +194,13 @@ void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int pipe)
 		exynos_crtc->ops->disable_vblank(exynos_crtc);
 }
 
+void exynos_drm_crtc_wait_pending_update(struct exynos_drm_crtc *exynos_crtc)
+{
+	wait_event_timeout(exynos_crtc->wait_update,
+			   (atomic_read(&exynos_crtc->pending_update) == 0),
+			   msecs_to_jiffies(50));
+}
+
 void exynos_drm_crtc_finish_update(struct exynos_drm_crtc *exynos_crtc,
 				struct exynos_drm_plane *exynos_plane)
 {
@@ -203,10 +209,12 @@ void exynos_drm_crtc_finish_update(struct exynos_drm_crtc *exynos_crtc,
 
 	exynos_plane->pending_fb = NULL;
 
+	if (atomic_dec_and_test(&exynos_crtc->pending_update))
+		wake_up(&exynos_crtc->wait_update);
+
 	spin_lock_irqsave(&crtc->dev->event_lock, flags);
 	if (exynos_crtc->event) {
 		drm_crtc_send_vblank_event(crtc, exynos_crtc->event);
-		drm_crtc_vblank_put(crtc);
 		wake_up(&exynos_crtc->pending_flip_queue);
 	}
 
diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.h b/drivers/gpu/drm/exynos/exynos_drm_crtc.h
index 8bedfde..f87d4ab 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.h
@@ -25,6 +25,7 @@ struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 					void *context);
 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int pipe);
 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int pipe);
+void exynos_drm_crtc_wait_pending_update(struct exynos_drm_crtc *exynos_crtc);
 void exynos_drm_crtc_finish_update(struct exynos_drm_crtc *exynos_crtc,
 				   struct exynos_drm_plane *exynos_plane);
 void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index a4937b5..241453f 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -46,11 +46,37 @@ struct exynos_atomic_commit {
 	u32			crtcs;
 };
 
+static void exynos_atomic_wait_for_commit(struct drm_atomic_state *state)
+{
+	struct drm_crtc_state *crtc_state;
+	struct drm_crtc *crtc;
+	int i, ret;
+
+	for_each_crtc_in_state(state, crtc, crtc_state, i) {
+		struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+
+		if (!crtc->state->enable)
+			continue;
+
+		ret = drm_crtc_vblank_get(crtc);
+		if (ret)
+			continue;
+
+		exynos_drm_crtc_wait_pending_update(exynos_crtc);
+		drm_crtc_vblank_put(crtc);
+	}
+}
+
 static void exynos_atomic_commit_complete(struct exynos_atomic_commit *commit)
 {
 	struct drm_device *dev = commit->dev;
 	struct exynos_drm_private *priv = dev->dev_private;
 	struct drm_atomic_state *state = commit->state;
+	struct drm_plane *plane;
+	struct drm_crtc *crtc;
+	struct drm_plane_state *plane_state;
+	struct drm_crtc_state *crtc_state;
+	int i;
 
 	drm_atomic_helper_commit_modeset_disables(dev, state);
 
@@ -64,9 +90,25 @@ static void exynos_atomic_commit_complete(struct exynos_atomic_commit *commit)
 	 * have the relevant clocks enabled to perform the update.
 	 */
 
+	for_each_crtc_in_state(state, crtc, crtc_state, i) {
+		struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+
+		atomic_set(&exynos_crtc->pending_update, 0);
+	}
+
+	for_each_plane_in_state(state, plane, plane_state, i) {
+		struct exynos_drm_crtc *exynos_crtc =
+						to_exynos_crtc(plane->crtc);
+
+		if (!plane->crtc)
+			continue;
+
+		atomic_inc(&exynos_crtc->pending_update);
+	}
+
 	drm_atomic_helper_commit_planes(dev, state);
 
-	drm_atomic_helper_wait_for_vblanks(dev, state);
+	exynos_atomic_wait_for_commit(state);
 
 	drm_atomic_helper_cleanup_planes(dev, state);
 
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index 406b278..d77dca4 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -136,6 +136,8 @@ struct exynos_drm_crtc_ops {
  *	this pipe value.
  * @enabled: if the crtc is enabled or not
  * @event: vblank event that is currently queued for flip
+ * @wait_update: wait all pending planes updates to finish
+ * @pending_update: number of pending plane updates in this crtc
  * @ops: pointer to callbacks for exynos drm specific functionality
  * @ctx: A pointer to the crtc's implementation specific context
  */
@@ -145,6 +147,8 @@ struct exynos_drm_crtc {
 	unsigned int			pipe;
 	wait_queue_head_t		pending_flip_queue;
 	struct drm_pending_vblank_event	*event;
+	wait_queue_head_t		wait_update;
+	atomic_t			pending_update;
 	const struct exynos_drm_crtc_ops	*ops;
 	void				*ctx;
 };
-- 
2.1.0

[PATCH 10/11] drm/exynos: remove wait queue for pending page flip

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Exynos atomic commit procedures already does this job of waiting for
pending updates to finish, that means using pending_flip_queue is
pointless now because the disable CRTC procedure will never happen
during a page_flip.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
---
 drivers/gpu/drm/exynos/exynos_drm_crtc.c | 11 +----------
 drivers/gpu/drm/exynos/exynos_drm_drv.h  |  1 -
 2 files changed, 1 insertion(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index 049ab67..44bb30e 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -35,11 +35,6 @@ static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
 {
 	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 
-	/* wait for the completion of page flip. */
-	if (!wait_event_timeout(exynos_crtc->pending_flip_queue,
-				(exynos_crtc->event == NULL), HZ/20))
-		exynos_crtc->event = NULL;
-
 	drm_crtc_vblank_off(crtc);
 
 	if (exynos_crtc->ops->disable)
@@ -144,8 +139,6 @@ struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 	if (!exynos_crtc)
 		return ERR_PTR(-ENOMEM);
 
-	init_waitqueue_head(&exynos_crtc->pending_flip_queue);
-
 	exynos_crtc->pipe = pipe;
 	exynos_crtc->type = type;
 	exynos_crtc->ops = ops;
@@ -213,10 +206,8 @@ void exynos_drm_crtc_finish_update(struct exynos_drm_crtc *exynos_crtc,
 		wake_up(&exynos_crtc->wait_update);
 
 	spin_lock_irqsave(&crtc->dev->event_lock, flags);
-	if (exynos_crtc->event) {
+	if (exynos_crtc->event)
 		drm_crtc_send_vblank_event(crtc, exynos_crtc->event);
-		wake_up(&exynos_crtc->pending_flip_queue);
-	}
 
 	exynos_crtc->event = NULL;
 	spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index d77dca4..5d052235 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -145,7 +145,6 @@ struct exynos_drm_crtc {
 	struct drm_crtc			base;
 	enum exynos_drm_output_type	type;
 	unsigned int			pipe;
-	wait_queue_head_t		pending_flip_queue;
 	struct drm_pending_vblank_event	*event;
 	wait_queue_head_t		wait_update;
 	atomic_t			pending_update;
-- 
2.1.0

[PATCH 11/11] drm/exynos: Enable atomic modesetting feature

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Now that atomic modesetting is implemented for exynos enable the
DRIVER_ATOMIC flag on the driver's features.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
---
 drivers/gpu/drm/exynos/exynos_drm_drv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 241453f..0ebe04f 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -439,7 +439,8 @@ static const struct file_operations exynos_drm_driver_fops = {
 };
 
 static struct drm_driver exynos_drm_driver = {
-	.driver_features	= DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
+	.driver_features	= DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
+				  | DRIVER_ATOMIC,
 	.load			= exynos_drm_load,
 	.unload			= exynos_drm_unload,
 	.open			= exynos_drm_open,
-- 
2.1.0