media: v4l: vsp1: Store pipeline pointer in vsp1_entity

Various types of objects subclassing vsp1_entity currently store a
pointer to the pipeline. Move the pointer to vsp1_entity to simplify the
code and avoid storing the pipeline in more entity subclasses later.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/vsp1/vsp1_drm.c

@@ -120,6 +120,7 @@ int vsp1_du_setup_lif(struct device *dev, unsigned int pipe_index,
 			 * inputs.
 			 */
 			WARN_ON(list_empty(&rpf->entity.list_pipe));
+			rpf->entity.pipe = NULL;
 			list_del_init(&rpf->entity.list_pipe);
 			pipe->inputs[i] = NULL;
 
@@ -536,8 +537,10 @@ void vsp1_du_atomic_flush(struct device *dev, unsigned int pipe_index)
 			continue;
 		}
 
-		if (list_empty(&rpf->entity.list_pipe))
+		if (list_empty(&rpf->entity.list_pipe)) {
+			rpf->entity.pipe = pipe;
 			list_add_tail(&rpf->entity.list_pipe, &pipe->entities);
+		}
 
 		bru->inputs[i].rpf = rpf;
 		rpf->bru_input = i;
@@ -562,6 +565,7 @@ void vsp1_du_atomic_flush(struct device *dev, unsigned int pipe_index)
 			vsp1_dl_list_write(dl, entity->route->reg,
 					   VI6_DPR_NODE_UNUSED);
 
+			entity->pipe = NULL;
 			list_del_init(&entity->list_pipe);
 
 			continue;
@@ -625,24 +629,28 @@ int vsp1_drm_init(struct vsp1_device *vsp1)
 
 		vsp1_pipeline_init(pipe);
 
+		pipe->frame_end = vsp1_du_pipeline_frame_end;
+
 		/*
 		 * The DRM pipeline is static, add entities manually. The first
 		 * pipeline uses the BRU and the second pipeline the BRS.
 		 */
 		pipe->bru = i == 0 ? &vsp1->bru->entity : &vsp1->brs->entity;
-		pipe->lif = &vsp1->lif[i]->entity;
 		pipe->output = vsp1->wpf[i];
-		pipe->output->pipe = pipe;
-		pipe->frame_end = vsp1_du_pipeline_frame_end;
+		pipe->lif = &vsp1->lif[i]->entity;
 
+		pipe->bru->pipe = pipe;
 		pipe->bru->sink = &pipe->output->entity;
 		pipe->bru->sink_pad = 0;
+		list_add_tail(&pipe->bru->list_pipe, &pipe->entities);
+
+		pipe->output->entity.pipe = pipe;
 		pipe->output->entity.sink = pipe->lif;
 		pipe->output->entity.sink_pad = 0;
+		list_add_tail(&pipe->output->entity.list_pipe, &pipe->entities);
 
-		list_add_tail(&pipe->bru->list_pipe, &pipe->entities);
+		pipe->lif->pipe = pipe;
 		list_add_tail(&pipe->lif->list_pipe, &pipe->entities);
-		list_add_tail(&pipe->output->entity.list_pipe, &pipe->entities);
 	}
 
 	/* Disable all RPFs initially. */

drivers/media/platform/vsp1/vsp1_drv.c

@@ -63,7 +63,7 @@ static irqreturn_t vsp1_irq_handler(int irq, void *data)
 		vsp1_write(vsp1, VI6_WPF_IRQ_STA(i), ~status & mask);
 
 		if (status & VI6_WFP_IRQ_STA_DFE) {
-			vsp1_pipeline_frame_end(wpf->pipe);
+			vsp1_pipeline_frame_end(wpf->entity.pipe);
 			ret = IRQ_HANDLED;
 		}
 	}

drivers/media/platform/vsp1/vsp1_entity.h

@@ -106,6 +106,8 @@ struct vsp1_entity {
 	unsigned int index;
 	const struct vsp1_route *route;
 
+	struct vsp1_pipeline *pipe;
+
 	struct list_head list_dev;
 	struct list_head list_pipe;
 

drivers/media/platform/vsp1/vsp1_histo.c

@@ -61,7 +61,7 @@ void vsp1_histogram_buffer_complete(struct vsp1_histogram *histo,
 				    struct vsp1_histogram_buffer *buf,
 				    size_t size)
 {
-	struct vsp1_pipeline *pipe = histo->pipe;
+	struct vsp1_pipeline *pipe = histo->entity.pipe;
 	unsigned long flags;
 
 	/*

drivers/media/platform/vsp1/vsp1_histo.h

@@ -25,7 +25,6 @@
 #include "vsp1_entity.h"
 
 struct vsp1_device;
-struct vsp1_pipeline;
 
 #define HISTO_PAD_SINK				0
 #define HISTO_PAD_SOURCE			1
@@ -37,8 +36,6 @@ struct vsp1_histogram_buffer {
 };
 
 struct vsp1_histogram {
-	struct vsp1_pipeline *pipe;
-
 	struct vsp1_entity entity;
 	struct video_device video;
 	struct media_pad pad;

drivers/media/platform/vsp1/vsp1_pipe.c

@@ -185,6 +185,7 @@ const struct vsp1_format_info *vsp1_get_format_info(struct vsp1_device *vsp1,
 
 void vsp1_pipeline_reset(struct vsp1_pipeline *pipe)
 {
+	struct vsp1_entity *entity;
 	unsigned int i;
 
 	if (pipe->bru) {
@@ -194,29 +195,13 @@ void vsp1_pipeline_reset(struct vsp1_pipeline *pipe)
 			bru->inputs[i].rpf = NULL;
 	}
 
-	for (i = 0; i < ARRAY_SIZE(pipe->inputs); ++i) {
-		if (pipe->inputs[i]) {
-			pipe->inputs[i]->pipe = NULL;
+	for (i = 0; i < ARRAY_SIZE(pipe->inputs); ++i)
 		pipe->inputs[i] = NULL;
-		}
-	}
 
-	if (pipe->output) {
-		pipe->output->pipe = NULL;
 	pipe->output = NULL;
-	}
-
-	if (pipe->hgo) {
-		struct vsp1_hgo *hgo = to_hgo(&pipe->hgo->subdev);
 
-		hgo->histo.pipe = NULL;
-	}
-
-	if (pipe->hgt) {
-		struct vsp1_hgt *hgt = to_hgt(&pipe->hgt->subdev);
-
-		hgt->histo.pipe = NULL;
-	}
+	list_for_each_entry(entity, &pipe->entities, list_pipe)
+		entity->pipe = NULL;
 
 	INIT_LIST_HEAD(&pipe->entities);
 	pipe->state = VSP1_PIPELINE_STOPPED;
@@ -423,7 +408,7 @@ void vsp1_pipelines_suspend(struct vsp1_device *vsp1)
 		if (wpf == NULL)
 			continue;
 
-		pipe = wpf->pipe;
+		pipe = wpf->entity.pipe;
 		if (pipe == NULL)
 			continue;
 
@@ -440,7 +425,7 @@ void vsp1_pipelines_suspend(struct vsp1_device *vsp1)
 		if (wpf == NULL)
 			continue;
 
-		pipe = wpf->pipe;
+		pipe = wpf->entity.pipe;
 		if (pipe == NULL)
 			continue;
 
@@ -465,7 +450,7 @@ void vsp1_pipelines_resume(struct vsp1_device *vsp1)
 		if (wpf == NULL)
 			continue;
 
-		pipe = wpf->pipe;
+		pipe = wpf->entity.pipe;
 		if (pipe == NULL)
 			continue;
 

drivers/media/platform/vsp1/vsp1_rwpf.h

@@ -27,7 +27,6 @@
 
 struct v4l2_ctrl;
 struct vsp1_dl_manager;
-struct vsp1_pipeline;
 struct vsp1_rwpf;
 struct vsp1_video;
 
@@ -39,7 +38,6 @@ struct vsp1_rwpf {
 	struct vsp1_entity entity;
 	struct v4l2_ctrl_handler ctrls;
 
-	struct vsp1_pipeline *pipe;
 	struct vsp1_video *video;
 
 	unsigned int max_width;

drivers/media/platform/vsp1/vsp1_video.c

@@ -324,7 +324,7 @@ static int vsp1_video_pipeline_setup_partitions(struct vsp1_pipeline *pipe)
 static struct vsp1_vb2_buffer *
 vsp1_video_complete_buffer(struct vsp1_video *video)
 {
-	struct vsp1_pipeline *pipe = video->rwpf->pipe;
+	struct vsp1_pipeline *pipe = video->rwpf->entity.pipe;
 	struct vsp1_vb2_buffer *next = NULL;
 	struct vsp1_vb2_buffer *done;
 	unsigned long flags;
@@ -598,20 +598,19 @@ static int vsp1_video_pipeline_build(struct vsp1_pipeline *pipe,
 		subdev = media_entity_to_v4l2_subdev(entity);
 		e = to_vsp1_entity(subdev);
 		list_add_tail(&e->list_pipe, &pipe->entities);
+		e->pipe = pipe;
 
 		switch (e->type) {
 		case VSP1_ENTITY_RPF:
 			rwpf = to_rwpf(subdev);
 			pipe->inputs[rwpf->entity.index] = rwpf;
 			rwpf->video->pipe_index = ++pipe->num_inputs;
-			rwpf->pipe = pipe;
 			break;
 
 		case VSP1_ENTITY_WPF:
 			rwpf = to_rwpf(subdev);
 			pipe->output = rwpf;
 			rwpf->video->pipe_index = 0;
-			rwpf->pipe = pipe;
 			break;
 
 		case VSP1_ENTITY_LIF:
@@ -625,12 +624,10 @@ static int vsp1_video_pipeline_build(struct vsp1_pipeline *pipe,
 
 		case VSP1_ENTITY_HGO:
 			pipe->hgo = e;
-			to_hgo(subdev)->histo.pipe = pipe;
 			break;
 
 		case VSP1_ENTITY_HGT:
 			pipe->hgt = e;
-			to_hgt(subdev)->histo.pipe = pipe;
 			break;
 
 		default:
@@ -682,7 +679,7 @@ static struct vsp1_pipeline *vsp1_video_pipeline_get(struct vsp1_video *video)
 	 * Otherwise allocate a new pipeline and initialize it, it will be freed
 	 * when the last reference is released.
 	 */
-	if (!video->rwpf->pipe) {
+	if (!video->rwpf->entity.pipe) {
 		pipe = kzalloc(sizeof(*pipe), GFP_KERNEL);
 		if (!pipe)
 			return ERR_PTR(-ENOMEM);
@@ -694,7 +691,7 @@ static struct vsp1_pipeline *vsp1_video_pipeline_get(struct vsp1_video *video)
 			return ERR_PTR(ret);
 		}
 	} else {
-		pipe = video->rwpf->pipe;
+		pipe = video->rwpf->entity.pipe;
 		kref_get(&pipe->kref);
 	}
 
@@ -777,7 +774,7 @@ static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
 {
 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 	struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
-	struct vsp1_pipeline *pipe = video->rwpf->pipe;
+	struct vsp1_pipeline *pipe = video->rwpf->entity.pipe;
 	struct vsp1_vb2_buffer *buf = to_vsp1_vb2_buffer(vbuf);
 	unsigned long flags;
 	bool empty;
@@ -872,7 +869,7 @@ static void vsp1_video_cleanup_pipeline(struct vsp1_pipeline *pipe)
 static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
 {
 	struct vsp1_video *video = vb2_get_drv_priv(vq);
-	struct vsp1_pipeline *pipe = video->rwpf->pipe;
+	struct vsp1_pipeline *pipe = video->rwpf->entity.pipe;
 	bool start_pipeline = false;
 	unsigned long flags;
 	int ret;
@@ -913,7 +910,7 @@ static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
 static void vsp1_video_stop_streaming(struct vb2_queue *vq)
 {
 	struct vsp1_video *video = vb2_get_drv_priv(vq);
-	struct vsp1_pipeline *pipe = video->rwpf->pipe;
+	struct vsp1_pipeline *pipe = video->rwpf->entity.pipe;
 	unsigned long flags;
 	int ret;