Hi Todor,
On Tue, Aug 08, 2017 at 04:30:06PM +0300, Todor Tomov wrote:
...
> +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;
Could you align starting and stopping the streaming with this patch:
<URL:http://www.spinics.net/lists/linux-media/msg117737.html>
I'll send a pull request on it shortly.
Feel free to postpone for now, this isn't urgent.
> +
> + 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;
> +}
> +
> +static void video_stop_streaming(struct vb2_queue *q)
> +{
> + 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;
> + struct v4l2_subdev *subdev_vfe = NULL;
> +
> + 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);
> +
> + if (strstr(subdev->name, "vfe")) {
> + subdev_vfe = subdev;
> + } else if (strstr(subdev->name, "ispif")) {
> + v4l2_subdev_call(subdev, video, s_stream, 0);
> + v4l2_subdev_call(subdev_vfe, video, s_stream, 0);
> + } else {
> + v4l2_subdev_call(subdev, video, s_stream, 0);
> + }
> + }
> +
> + media_pipeline_stop(&vdev->entity);
> +
> + video->ops->flush_buffers(video, VB2_BUF_STATE_ERROR);
> +}
--
Regards,
Sakari Ailus
e-mail: sakari.ai...@iki.fi XMPP: sai...@retiisi.org.uk
