unsigned int i;
int ret;
- mutex_lock(&mdev->graph_mutex);
-
/* Walk the graph to locate the entities and video nodes. */
ret = media_entity_graph_walk_init(&graph, mdev);
- if (ret) {
- mutex_unlock(&mdev->graph_mutex);
+ if (ret)
return ret;
- }
media_entity_graph_walk_start(&graph, entity);
}
}
- mutex_unlock(&mdev->graph_mutex);
-
media_entity_graph_walk_cleanup(&graph);
/* We need one output and at least one input. */
- if (pipe->num_inputs == 0 || !pipe->output) {
- ret = -EPIPE;
- goto error;
- }
+ if (pipe->num_inputs == 0 || !pipe->output)
+ return -EPIPE;
/* Follow links downstream for each input and make sure the graph
* contains no loop and that all branches end at the output WPF.
ret = vsp1_video_pipeline_build_branch(pipe, pipe->inputs[i],
pipe->output);
if (ret < 0)
- goto error;
+ return ret;
}
return 0;
-
-error:
- vsp1_pipeline_reset(pipe);
- return ret;
}
static int vsp1_video_pipeline_init(struct vsp1_pipeline *pipe,
struct vsp1_video *video)
{
+ vsp1_pipeline_init(pipe);
+
+ pipe->frame_end = vsp1_video_pipeline_frame_end;
+
+ return vsp1_video_pipeline_build(pipe, video);
+}
+
+static struct vsp1_pipeline *vsp1_video_pipeline_get(struct vsp1_video *video)
+{
+ struct vsp1_pipeline *pipe;
int ret;
- mutex_lock(&pipe->lock);
+ /* Get a pipeline object for the video node. If a pipeline has already
+ * been allocated just increment its reference count and return it.
+ * Otherwise allocate a new pipeline and initialize it, it will be freed
+ * when the last reference is released.
+ */
+ if (!video->rwpf->pipe) {
+ pipe = kzalloc(sizeof(*pipe), GFP_KERNEL);
+ if (!pipe)
+ return ERR_PTR(-ENOMEM);
- /* If we're the first user build and validate the pipeline. */
- if (pipe->use_count == 0) {
- ret = vsp1_video_pipeline_build(pipe, video);
- if (ret < 0)
- goto done;
+ ret = vsp1_video_pipeline_init(pipe, video);
+ if (ret < 0) {
+ vsp1_pipeline_reset(pipe);
+ kfree(pipe);
+ return ERR_PTR(ret);
+ }
+ } else {
+ pipe = video->rwpf->pipe;
+ kref_get(&pipe->kref);
}
- pipe->use_count++;
- ret = 0;
-
-done:
- mutex_unlock(&pipe->lock);
- return ret;
+ return pipe;
}
-static void vsp1_video_pipeline_cleanup(struct vsp1_pipeline *pipe)
+static void vsp1_video_pipeline_release(struct kref *kref)
{
- mutex_lock(&pipe->lock);
+ struct vsp1_pipeline *pipe = container_of(kref, typeof(*pipe), kref);
- /* If we're the last user clean up the pipeline. */
- if (--pipe->use_count == 0)
- vsp1_pipeline_reset(pipe);
+ vsp1_pipeline_reset(pipe);
+ kfree(pipe);
+}
- mutex_unlock(&pipe->lock);
+static void vsp1_video_pipeline_put(struct vsp1_pipeline *pipe)
+{
+ struct media_device *mdev = &pipe->output->entity.vsp1->media_dev;
+
+ mutex_lock(&mdev->graph_mutex);
+ kref_put(&pipe->kref, vsp1_video_pipeline_release);
+ mutex_unlock(&mdev->graph_mutex);
}
/* -----------------------------------------------------------------------------
}
mutex_unlock(&pipe->lock);
- vsp1_video_pipeline_cleanup(pipe);
media_entity_pipeline_stop(&video->video.entity);
+ vsp1_video_pipeline_put(pipe);
/* Remove all buffers from the IRQ queue. */
spin_lock_irqsave(&video->irqlock, flags);
{
struct v4l2_fh *vfh = file->private_data;
struct vsp1_video *video = to_vsp1_video(vfh->vdev);
+ struct media_device *mdev = &video->vsp1->media_dev;
struct vsp1_pipeline *pipe;
int ret;
video->sequence = 0;
- /* Start streaming on the pipeline. No link touching an entity in the
- * pipeline can be activated or deactivated once streaming is started.
- *
- * Use the VSP1 pipeline object embedded in the first video object that
- * starts streaming.
- *
- * FIXME: This is racy, the ioctl is only protected by the video node
- * lock.
+ /* Get a pipeline for the video node and start streaming on it. No link
+ * touching an entity in the pipeline can be activated or deactivated
+ * once streaming is started.
*/
- pipe = video->rwpf->pipe ? video->rwpf->pipe : &video->pipe;
+ mutex_lock(&mdev->graph_mutex);
- ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
- if (ret < 0)
- return ret;
+ pipe = vsp1_video_pipeline_get(video);
+ if (IS_ERR(pipe)) {
+ mutex_unlock(&mdev->graph_mutex);
+ return PTR_ERR(pipe);
+ }
+
+ ret = __media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
+ if (ret < 0) {
+ mutex_unlock(&mdev->graph_mutex);
+ goto err_pipe;
+ }
+
+ mutex_unlock(&mdev->graph_mutex);
/* Verify that the configured format matches the output of the connected
* subdev.
if (ret < 0)
goto err_stop;
- ret = vsp1_video_pipeline_init(pipe, video);
- if (ret < 0)
- goto err_stop;
-
/* Start the queue. */
ret = vb2_streamon(&video->queue, type);
if (ret < 0)
- goto err_cleanup;
+ goto err_stop;
return 0;
-err_cleanup:
- vsp1_video_pipeline_cleanup(pipe);
err_stop:
media_entity_pipeline_stop(&video->video.entity);
+err_pipe:
+ vsp1_video_pipeline_put(pipe);
return ret;
}
spin_lock_init(&video->irqlock);
INIT_LIST_HEAD(&video->irqqueue);
- vsp1_pipeline_init(&video->pipe);
- video->pipe.frame_end = vsp1_video_pipeline_frame_end;
-
/* Initialize the media entity... */
ret = media_entity_pads_init(&video->video.entity, 1, &video->pad);
if (ret < 0)
projects / deliverable / linux.git / commitdiff
