/* Return a pointer to the ISP video instance at the far end of the pipeline. */
static struct isp_video *
isp_video_far_end(struct isp_video *video)
{
struct media_entity_graph graph;
struct media_entity *entity = &video->video.entity;
struct media_device *mdev = entity->parent;
struct isp_video *far_end = NULL;
mutex_lock(&mdev->graph_mutex);
media_entity_graph_walk_start(&graph, entity);
while ((entity = media_entity_graph_walk_next(&graph))) {
if (entity == &video->video.entity)
continue;
if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
continue;
far_end = to_isp_video(media_entity_to_video_device(entity));
if (far_end->type != video->type)
break;
far_end = NULL;
}
mutex_unlock(&mdev->graph_mutex);
return far_end;
}
/* 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);
}
/* Return a pointer to the ISP video instance at the far end of the pipeline. */
static int isp_video_get_graph_data(struct isp_video *video,
struct isp_pipeline *pipe)
{
struct media_entity_graph graph;
struct media_entity *entity = &video->video.entity;
struct media_device *mdev = entity->graph_obj.mdev;
struct isp_video *far_end = NULL;
int ret;
mutex_lock(&mdev->graph_mutex);
ret = media_entity_graph_walk_init(&graph, entity->graph_obj.mdev);
if (ret) {
mutex_unlock(&mdev->graph_mutex);
return ret;
}
media_entity_graph_walk_start(&graph, entity);
while ((entity = media_entity_graph_walk_next(&graph))) {
struct isp_video *__video;
media_entity_enum_set(&pipe->ent_enum, entity);
if (far_end != NULL)
continue;
if (entity == &video->video.entity)
continue;
if (!is_media_entity_v4l2_video_device(entity))
continue;
__video = to_isp_video(media_entity_to_video_device(entity));
if (__video->type != video->type)
far_end = __video;
}
mutex_unlock(&mdev->graph_mutex);
media_entity_graph_walk_cleanup(&graph);
if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
pipe->input = far_end;
pipe->output = video;
} else {
if (far_end == NULL)
return -EPIPE;
pipe->input = video;
pipe->output = far_end;
}
return 0;
}
/* Return a pointer to the ISP video instance at the far end of the pipeline. */
static int isp_video_get_graph_data(struct isp_video *video,
struct isp_pipeline *pipe)
{
struct media_entity_graph graph;
struct media_entity *entity = &video->video.entity;
struct media_device *mdev = entity->parent;
struct isp_video *far_end = NULL;
mutex_lock(&mdev->graph_mutex);
media_entity_graph_walk_start(&graph, entity);
while ((entity = media_entity_graph_walk_next(&graph))) {
struct isp_video *__video;
pipe->entities |= 1 << entity->id;
if (far_end != NULL)
continue;
if (entity == &video->video.entity)
continue;
if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
continue;
__video = to_isp_video(media_entity_to_video_device(entity));
if (__video->type != video->type)
far_end = __video;
}
mutex_unlock(&mdev->graph_mutex);
if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
pipe->input = far_end;
pipe->output = video;
} else {
if (far_end == NULL)
return -EPIPE;
pipe->input = video;
pipe->output = far_end;
}
return 0;
}
/* 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;
}
static int xvip_pipeline_validate(struct xvip_pipeline *pipe,
struct xvip_dma *start)
{
struct media_entity_graph graph;
struct media_entity *entity = &start->video.entity;
struct media_device *mdev = entity->parent;
unsigned int num_inputs = 0;
unsigned int num_outputs = 0;
mutex_lock(&mdev->graph_mutex);
/* Walk the graph to locate the video nodes. */
media_entity_graph_walk_start(&graph, entity);
while ((entity = media_entity_graph_walk_next(&graph))) {
struct xvip_dma *dma;
if (entity->type != MEDIA_ENT_T_DEVNODE_V4L)
continue;
dma = to_xvip_dma(media_entity_to_video_device(entity));
if (dma->pad.flags & MEDIA_PAD_FL_SINK) {
pipe->output = dma;
num_outputs++;
} else {
num_inputs++;
}
}
mutex_unlock(&mdev->graph_mutex);
/* We need exactly one output and zero or one input. */
if (num_outputs != 1 || num_inputs > 1)
return -EPIPE;
pipe->num_dmas = num_inputs + num_outputs;
return 0;
}
/*
* media_entity_operations
*/
static int nxp_link_setup(struct media_entity *entity,
const struct media_pad *local,
const struct media_pad *remote, u32 flags)
{
struct video_device *vdev = media_entity_to_video_device(entity);
struct nxp_video *me = video_get_drvdata(vdev);
pr_debug("%s: me type(%d)\n", __func__, me->type);
switch (local->index | media_entity_type(remote->entity)) {
case 0 | MEDIA_ENT_T_V4L2_SUBDEV:
/* capture, m2m : sink
* video : source
*/
pr_debug("local %d, link subdev\n", local->index);
break;
case 0 | MEDIA_ENT_T_DEVNODE:
pr_debug("local %d, link videodev\n", local->index);
break;
case 1 | MEDIA_ENT_T_V4L2_SUBDEV:
pr_debug("local %d, link subdev\n", local->index);
break;
case 1 | MEDIA_ENT_T_DEVNODE:
pr_debug("local %d, link videodev\n", local->index);
break;
}
if (flags & MEDIA_LNK_FL_ENABLED)
pr_debug("====> linked\n");
else
pr_debug("====> unlinked\n");
return 0;
}
