static int fimc_md_link_notify(struct media_pad *source,
struct media_pad *sink, u32 flags)
{
struct fimc_lite *fimc_lite = NULL;
struct fimc_dev *fimc = NULL;
struct fimc_pipeline *pipeline;
struct v4l2_subdev *sd;
int ret = 0;
if (media_entity_type(sink->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
return 0;
sd = media_entity_to_v4l2_subdev(sink->entity);
switch (sd->grp_id) {
case FLITE_GROUP_ID:
fimc_lite = v4l2_get_subdevdata(sd);
pipeline = &fimc_lite->pipeline;
break;
case FIMC_GROUP_ID:
fimc = v4l2_get_subdevdata(sd);
pipeline = &fimc->pipeline;
break;
default:
return 0;
}
if (!(flags & MEDIA_LNK_FL_ENABLED)) {
ret = __fimc_pipeline_close(pipeline);
pipeline->subdevs[IDX_SENSOR] = NULL;
pipeline->subdevs[IDX_CSIS] = NULL;
if (fimc) {
mutex_lock(&fimc->lock);
fimc_ctrls_delete(fimc->vid_cap.ctx);
mutex_unlock(&fimc->lock);
}
return ret;
}
/*
* Link activation. Enable power of pipeline elements only if the
* pipeline is already in use, i.e. its video node is opened.
* Recreate the controls destroyed during the link deactivation.
*/
if (fimc) {
mutex_lock(&fimc->lock);
if (fimc->vid_cap.refcnt > 0) {
ret = __fimc_pipeline_open(pipeline,
source->entity, true);
if (!ret)
ret = fimc_capture_ctrls_create(fimc);
}
mutex_unlock(&fimc->lock);
} else {
mutex_lock(&fimc_lite->lock);
ret = __fimc_pipeline_open(pipeline, source->entity, true);
mutex_unlock(&fimc_lite->lock);
}
return ret ? -EPIPE : ret;
}
static int __fimc_md_modify_pipeline(struct media_entity *entity, bool enable)
{
struct exynos_video_entity *ve;
struct fimc_pipeline *p;
struct video_device *vdev;
int ret;
vdev = media_entity_to_video_device(entity);
if (vdev->entity.use_count == 0)
return 0;
ve = vdev_to_exynos_video_entity(vdev);
p = to_fimc_pipeline(ve->pipe);
/*
* Nothing to do if we are disabling the pipeline, some link
* has been disconnected and p->subdevs array is cleared now.
*/
if (!enable && p->subdevs[IDX_SENSOR] == NULL)
return 0;
if (enable)
ret = __fimc_pipeline_open(ve->pipe, entity, true);
else
ret = __fimc_pipeline_close(ve->pipe);
if (ret == 0 && !enable)
memset(p->subdevs, 0, sizeof(p->subdevs));
return ret;
}
static int fimc_pipeline_open(struct fimc_pipeline *p,
struct media_entity *me, bool prep)
{
int ret;
mutex_lock(&me->parent->graph_mutex);
ret = __fimc_pipeline_open(p, me, prep);
mutex_unlock(&me->parent->graph_mutex);
return ret;
}
