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

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On Wed, Jul 19, 2017 at 04:39:16PM +0200, 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@xxxxxxxxxxxxxxx>
> Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Cc: linux-renesas-soc@xxxxxxxxxxxxxxx

Didn't compile-test, but looks correct now.

Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>

> ---
>  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,
>  					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.
> @@ -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;
>  
>  	/* 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, *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 +157,19 @@ 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(plane, old_plane_state, new_plane_state)) {
>  			dev_dbg(rcdu->dev, "%s: plane needs reallocation\n",
>  				__func__);
>  			groups |= 1 << plane->group->index;
> @@ -179,7 +177,7 @@ 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 +202,7 @@ 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 +224,16 @@ 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 +244,16 @@ 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, *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 +261,8 @@ 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(plane, old_plane_state, new_plane_state))
>  			continue;
>  
>  		/* Try to allocate the plane from the free planes currently
> @@ -271,15 +270,15 @@ 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 +287,12 @@ 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,
> -- 
> 2.11.0
> 
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> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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