/* make a note of pipeline details */
static void vpfe_prepare_pipeline(struct vpfe_video_device *video)
{
struct media_entity *entity = &video->video_dev.entity;
struct media_device *mdev = entity->parent;
struct vpfe_pipeline *pipe = &video->pipe;
struct vpfe_video_device *far_end = NULL;
struct media_entity_graph graph;
pipe->input_num = 0;
pipe->output_num = 0;
if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
pipe->inputs[pipe->input_num++] = video;
else
pipe->outputs[pipe->output_num++] = video;
mutex_lock(&mdev->graph_mutex);
media_entity_graph_walk_start(&graph, entity);
while ((entity = media_entity_graph_walk_next(&graph))) {
if (entity == &video->video_dev.entity)
continue;
if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
continue;
far_end = to_vpfe_video(media_entity_to_video_device(entity));
if (far_end->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
pipe->inputs[pipe->input_num++] = far_end;
else
pipe->outputs[pipe->output_num++] = far_end;
}
mutex_unlock(&mdev->graph_mutex);
}
/* make a note of pipeline details */
static int vpfe_prepare_pipeline(struct vpfe_video_device *video)
{
struct media_graph graph;
struct media_entity *entity = &video->video_dev.entity;
struct media_device *mdev = entity->graph_obj.mdev;
struct vpfe_pipeline *pipe = &video->pipe;
struct vpfe_video_device *far_end = NULL;
int ret;
pipe->input_num = 0;
pipe->output_num = 0;
if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
pipe->inputs[pipe->input_num++] = video;
else
pipe->outputs[pipe->output_num++] = video;
mutex_lock(&mdev->graph_mutex);
ret = media_graph_walk_init(&graph, mdev);
if (ret) {
mutex_unlock(&mdev->graph_mutex);
return -ENOMEM;
}
media_graph_walk_start(&graph, entity);
while ((entity = media_graph_walk_next(&graph))) {
if (entity == &video->video_dev.entity)
continue;
if (!is_media_entity_v4l2_video_device(entity))
continue;
far_end = to_vpfe_video(media_entity_to_video_device(entity));
if (far_end->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
pipe->inputs[pipe->input_num++] = far_end;
else
pipe->outputs[pipe->output_num++] = far_end;
}
media_graph_walk_cleanup(&graph);
mutex_unlock(&mdev->graph_mutex);
return 0;
}
