static int isp_video_streamon(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct fimc_isp *isp = video_drvdata(file);
struct exynos_video_entity *ve = &isp->video_capture.ve;
struct media_entity *me = &ve->vdev.entity;
int ret;
ret = media_pipeline_start(me, &ve->pipe->mp);
if (ret < 0)
return ret;
ret = isp_video_pipeline_validate(isp);
if (ret < 0)
goto p_stop;
ret = vb2_ioctl_streamon(file, priv, type);
if (ret < 0)
goto p_stop;
isp->video_capture.streaming = 1;
return 0;
p_stop:
media_pipeline_stop(me);
return ret;
}
static int video_start_streaming(struct vb2_queue *q, unsigned int count)
{
struct camss_video *video = vb2_get_drv_priv(q);
struct video_device *vdev = &video->vdev;
struct media_entity *entity;
struct media_pad *pad;
struct v4l2_subdev *subdev;
int ret;
ret = media_pipeline_start(&vdev->entity, &video->pipe);
if (ret < 0)
return ret;
ret = video_check_format(video);
if (ret < 0)
goto error;
entity = &vdev->entity;
while (1) {
pad = &entity->pads[0];
if (!(pad->flags & MEDIA_PAD_FL_SINK))
break;
pad = media_entity_remote_pad(pad);
if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
break;
entity = pad->entity;
subdev = media_entity_to_v4l2_subdev(entity);
ret = v4l2_subdev_call(subdev, video, s_stream, 1);
if (ret < 0 && ret != -ENOIOCTLCMD)
goto error;
}
return 0;
error:
media_pipeline_stop(&vdev->entity);
video->ops->flush_buffers(video, VB2_BUF_STATE_QUEUED);
return ret;
}