[v2,3/7] drm/rcar-du: Use new iterator macros, v2.
diff mbox

Message ID 1518645.4VQmJDGaiE@avalon
State New
Headers show

Commit Message

Laurent Pinchart July 26, 2017, 11:53 a.m. UTC
Hi Maarten,

Thank you for the patch.

On Wednesday 19 Jul 2017 16:39:16 Maarten Lankhorst wrote:
> for_each_obj_in_state is about to be removed, so use the correct new
> iterator macros.
> 
> Also look at new_plane_state instead of plane->state when looking up
> the hw planes in use. They should be the same except when reallocating,
> (in which case this code is skipped) and we should really stop looking
> at obj->state whenever possible.
> 
> Changes since v1:
> - Actually compile correctly.
> 
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Cc: linux-renesas-soc@vger.kernel.org
> ---
>  drivers/gpu/drm/rcar-du/rcar_du_plane.c | 57 ++++++++++++++---------------
>  1 file changed, 28 insertions(+), 29 deletions(-)
> 
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.c
> b/drivers/gpu/drm/rcar-du/rcar_du_plane.c index dcde6288da6c..50fd793c38d1
> 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c
> @@ -51,12 +51,9 @@
>   */
> 
>  static bool rcar_du_plane_needs_realloc(struct rcar_du_plane *plane,
> +					const struct rcar_du_plane_state *cur_state,

I would call this old_state to be consistent with the naming scheme used in
the subsystem.

>  					struct rcar_du_plane_state *new_state)

The function doesn't need the plane argument anymore, it can be removed.

>  {
> -	struct rcar_du_plane_state *cur_state;
> -
> -	cur_state = to_rcar_plane_state(plane->plane.state);
> -
>  	/* Lowering the number of planes doesn't strictly require reallocation
>  	 * as the extra hardware plane will be freed when committing, but doing
>  	 * so could lead to more fragmentation.
> @@ -141,16 +138,17 @@ int rcar_du_atomic_check_planes(struct drm_device
> *dev, unsigned int groups = 0;
>  	unsigned int i;
>  	struct drm_plane *drm_plane;
> -	struct drm_plane_state *drm_plane_state;
> +	struct drm_plane_state *old_drm_plane_state, *new_drm_plane_state;

One variable declaration per line please (here and below).

>  	/* Check if hardware planes need to be reallocated. */
> -	for_each_plane_in_state(state, drm_plane, drm_plane_state, i) {
> -		struct rcar_du_plane_state *plane_state;
> +	for_each_oldnew_plane_in_state(state, drm_plane, old_drm_plane_state,
> new_drm_plane_state, i) {

Could you please break lines to keep them below the 80 columns limit (here and
below) ?

> +		struct rcar_du_plane_state *old_plane_state, *new_plane_state;
>  		struct rcar_du_plane *plane;
>  		unsigned int index;
> 
>  		plane = to_rcar_plane(drm_plane);
> -		plane_state = to_rcar_plane_state(drm_plane_state);
> +		old_plane_state = to_rcar_plane_state(old_drm_plane_state);
> +		new_plane_state = to_rcar_plane_state(new_drm_plane_state);
> 
>  		dev_dbg(rcdu->dev, "%s: checking plane (%u,%tu)\n", __func__,
>  			plane->group->index, plane - plane->group->planes);

[snip]

Feel free to use this version of the patch.

From 21ea2b1e4dcdfb1fd0ff44776434219793e0ef75 Mon Sep 17 00:00:00 2001
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Date: Wed, 12 Jul 2017 12:43:40 +0200
Subject: [PATCH v3] drm: rcar-du: Use new iterator macros

for_each_obj_in_state is about to be removed, so use the correct new
iterator macros.

Also look at new_plane_state instead of plane->state when looking up
the hw planes in use. They should be the same except when reallocating,
(in which case this code is skipped) and we should really stop looking
at obj->state whenever possible.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v2:

- Removed plane argument to rcar_du_plane_needs_realloc()
- Avoid lines longer than 80 columns when possible
- Declare one variable per line

Changes since v1:

- Actually compile correctly.
---
 drivers/gpu/drm/rcar-du/rcar_du_plane.c | 72 +++++++++++++++++----------------
 1 file changed, 38 insertions(+), 34 deletions(-)

Comments

Laurent Pinchart July 29, 2017, 8:57 p.m. UTC | #1
Hi Maarten,

On Wednesday 26 Jul 2017 14:53:33 Laurent Pinchart wrote:
> On Wednesday 19 Jul 2017 16:39:16 Maarten Lankhorst wrote:
> > for_each_obj_in_state is about to be removed, so use the correct new
> > iterator macros.
> > 
> > Also look at new_plane_state instead of plane->state when looking up
> > the hw planes in use. They should be the same except when reallocating,
> > (in which case this code is skipped) and we should really stop looking
> > at obj->state whenever possible.
> > 
> > Changes since v1:
> > - Actually compile correctly.
> > 
> > Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> > Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > Cc: linux-renesas-soc@vger.kernel.org

I plan to send a pull request to Dave in the middle of next week with a bunch 
of rcar-du-drm patches that will generate a few conflicts with this one. 
They're all simple to solve as they're located in comments, but that will be 
annoying nonetheless. I can include a rebased version of this patch in my pull 
request if it can help, depending on when you plan to get this series merged 
in drm-misc-next.

Patch
diff mbox

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.c b/drivers/gpu/drm/rcar-du/rcar_du_plane.c
index dcde6288da6c..4bad0b79d3f2 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c
@@ -50,23 +50,20 @@ 
  * automatically when the core swaps the old and new states.
  */
 
-static bool rcar_du_plane_needs_realloc(struct rcar_du_plane *plane,
-					struct rcar_du_plane_state *new_state)
+static bool rcar_du_plane_needs_realloc(
+				const struct rcar_du_plane_state *old_state,
+				const struct rcar_du_plane_state *new_state)
 {
-	struct rcar_du_plane_state *cur_state;
-
-	cur_state = to_rcar_plane_state(plane->plane.state);
-
 	/* Lowering the number of planes doesn't strictly require reallocation
 	 * as the extra hardware plane will be freed when committing, but doing
 	 * so could lead to more fragmentation.
 	 */
-	if (!cur_state->format ||
-	    cur_state->format->planes != new_state->format->planes)
+	if (!old_state->format ||
+	    old_state->format->planes != new_state->format->planes)
 		return true;
 
 	/* Reallocate hardware planes if the source has changed. */
-	if (cur_state->source != new_state->source)
+	if (old_state->source != new_state->source)
 		return true;
 
 	return false;
@@ -141,16 +138,20 @@  int rcar_du_atomic_check_planes(struct drm_device *dev,
 	unsigned int groups = 0;
 	unsigned int i;
 	struct drm_plane *drm_plane;
-	struct drm_plane_state *drm_plane_state;
+	struct drm_plane_state *old_drm_plane_state;
+	struct drm_plane_state *new_drm_plane_state;
 
 	/* Check if hardware planes need to be reallocated. */
-	for_each_plane_in_state(state, drm_plane, drm_plane_state, i) {
-		struct rcar_du_plane_state *plane_state;
+	for_each_oldnew_plane_in_state(state, drm_plane, old_drm_plane_state,
+				       new_drm_plane_state, i) {
+		struct rcar_du_plane_state *old_plane_state;
+		struct rcar_du_plane_state *new_plane_state;
 		struct rcar_du_plane *plane;
 		unsigned int index;
 
 		plane = to_rcar_plane(drm_plane);
-		plane_state = to_rcar_plane_state(drm_plane_state);
+		old_plane_state = to_rcar_plane_state(old_drm_plane_state);
+		new_plane_state = to_rcar_plane_state(new_drm_plane_state);
 
 		dev_dbg(rcdu->dev, "%s: checking plane (%u,%tu)\n", __func__,
 			plane->group->index, plane - plane->group->planes);
@@ -159,19 +160,19 @@  int rcar_du_atomic_check_planes(struct drm_device *dev,
 		 * the full reallocation procedure. Just mark the hardware
 		 * plane(s) as freed.
 		 */
-		if (!plane_state->format) {
+		if (!new_plane_state->format) {
 			dev_dbg(rcdu->dev, "%s: plane is being disabled\n",
 				__func__);
 			index = plane - plane->group->planes;
 			group_freed_planes[plane->group->index] |= 1 << index;
-			plane_state->hwindex = -1;
+			new_plane_state->hwindex = -1;
 			continue;
 		}
 
 		/* If the plane needs to be reallocated mark it as such, and
 		 * mark the hardware plane(s) as free.
 		 */
-		if (rcar_du_plane_needs_realloc(plane, plane_state)) {
+		if (rcar_du_plane_needs_realloc(old_plane_state, new_plane_state)) {
 			dev_dbg(rcdu->dev, "%s: plane needs reallocation\n",
 				__func__);
 			groups |= 1 << plane->group->index;
@@ -179,7 +180,7 @@  int rcar_du_atomic_check_planes(struct drm_device *dev,
 
 			index = plane - plane->group->planes;
 			group_freed_planes[plane->group->index] |= 1 << index;
-			plane_state->hwindex = -1;
+			new_plane_state->hwindex = -1;
 		}
 	}
 
@@ -204,7 +205,7 @@  int rcar_du_atomic_check_planes(struct drm_device *dev,
 
 		for (i = 0; i < group->num_planes; ++i) {
 			struct rcar_du_plane *plane = &group->planes[i];
-			struct rcar_du_plane_state *plane_state;
+			struct rcar_du_plane_state *new_plane_state;
 			struct drm_plane_state *s;
 
 			s = drm_atomic_get_plane_state(state, &plane->plane);
@@ -226,16 +227,16 @@  int rcar_du_atomic_check_planes(struct drm_device *dev,
 				continue;
 			}
 
-			plane_state = to_rcar_plane_state(plane->plane.state);
-			used_planes |= rcar_du_plane_hwmask(plane_state);
+			new_plane_state = to_rcar_plane_state(s);
+			used_planes |= rcar_du_plane_hwmask(new_plane_state);
 
 			dev_dbg(rcdu->dev,
 				"%s: plane (%u,%tu) uses %u hwplanes (index %d)\n",
 				__func__, plane->group->index,
 				plane - plane->group->planes,
-				plane_state->format ?
-				plane_state->format->planes : 0,
-				plane_state->hwindex);
+				new_plane_state->format ?
+				new_plane_state->format->planes : 0,
+				new_plane_state->hwindex);
 		}
 
 		group_free_planes[index] = 0xff & ~used_planes;
@@ -246,15 +247,18 @@  int rcar_du_atomic_check_planes(struct drm_device *dev,
 	}
 
 	/* Reallocate hardware planes for each plane that needs it. */
-	for_each_plane_in_state(state, drm_plane, drm_plane_state, i) {
-		struct rcar_du_plane_state *plane_state;
+	for_each_oldnew_plane_in_state(state, drm_plane, old_drm_plane_state,
+				       new_drm_plane_state, i) {
+		struct rcar_du_plane_state *old_plane_state;
+		struct rcar_du_plane_state *new_plane_state;
 		struct rcar_du_plane *plane;
 		unsigned int crtc_planes;
 		unsigned int free;
 		int idx;
 
 		plane = to_rcar_plane(drm_plane);
-		plane_state = to_rcar_plane_state(drm_plane_state);
+		old_plane_state = to_rcar_plane_state(old_drm_plane_state);
+		new_plane_state = to_rcar_plane_state(new_drm_plane_state);
 
 		dev_dbg(rcdu->dev, "%s: allocating plane (%u,%tu)\n", __func__,
 			plane->group->index, plane - plane->group->planes);
@@ -262,8 +266,8 @@  int rcar_du_atomic_check_planes(struct drm_device *dev,
 		/* Skip planes that are being disabled or don't need to be
 		 * reallocated.
 		 */
-		if (!plane_state->format ||
-		    !rcar_du_plane_needs_realloc(plane, plane_state))
+		if (!new_plane_state->format ||
+		    !rcar_du_plane_needs_realloc(old_plane_state, new_plane_state))
 			continue;
 
 		/* Try to allocate the plane from the free planes currently
@@ -271,15 +275,15 @@  int rcar_du_atomic_check_planes(struct drm_device *dev,
 		 * group and thus minimize flicker. If it fails fall back to
 		 * allocating from all free planes.
 		 */
-		crtc_planes = to_rcar_crtc(plane_state->state.crtc)->index % 2
+		crtc_planes = to_rcar_crtc(new_plane_state->state.crtc)->index % 2
 			    ? plane->group->dptsr_planes
 			    : ~plane->group->dptsr_planes;
 		free = group_free_planes[plane->group->index];
 
-		idx = rcar_du_plane_hwalloc(plane, plane_state,
+		idx = rcar_du_plane_hwalloc(plane, new_plane_state,
 					    free & crtc_planes);
 		if (idx < 0)
-			idx = rcar_du_plane_hwalloc(plane, plane_state,
+			idx = rcar_du_plane_hwalloc(plane, new_plane_state,
 						    free);
 		if (idx < 0) {
 			dev_dbg(rcdu->dev, "%s: no available hardware plane\n",
@@ -288,12 +292,12 @@  int rcar_du_atomic_check_planes(struct drm_device *dev,
 		}
 
 		dev_dbg(rcdu->dev, "%s: allocated %u hwplanes (index %u)\n",
-			__func__, plane_state->format->planes, idx);
+			__func__, new_plane_state->format->planes, idx);
 
-		plane_state->hwindex = idx;
+		new_plane_state->hwindex = idx;
 
 		group_free_planes[plane->group->index] &=
-			~rcar_du_plane_hwmask(plane_state);
+			~rcar_du_plane_hwmask(new_plane_state);
 
 		dev_dbg(rcdu->dev, "%s: group %u free planes mask 0x%02x\n",
 			__func__, plane->group->index,