Hi Yong,
On Wed, Jun 14, 2017 at 05:19:26PM -0500, Yong Zhi wrote:
> +int ipu3_v4l2_register(struct imgu_device *dev)
> +{
> + struct ipu3_mem2mem2_device *m2m2 = &dev->mem2mem2;
> + int i, r;
> +
> + /* Initialize miscellaneous variables */
> + m2m2->streaming = false;
> + m2m2->v4l2_file_ops = ipu3_v4l2_fops;
> +
> + /* Set up media device */
> + m2m2->media_dev.dev = m2m2->dev;
> + strlcpy(m2m2->media_dev.model, m2m2->model,
> + sizeof(m2m2->media_dev.model));
> + snprintf(m2m2->media_dev.bus_info, sizeof(m2m2->media_dev.bus_info),
> + "%s", dev_name(m2m2->dev));
> + m2m2->media_dev.driver_version = KERNEL_VERSION(4, 12, 0);
> + m2m2->media_dev.hw_revision = 0;
> + media_device_init(&m2m2->media_dev);
> + r = media_device_register(&m2m2->media_dev);
> + if (r) {
> + dev_err(m2m2->dev, "failed to register media device (%d)\n", r);
> + goto fail_media_dev;
> + }
> +
> + /* Set up v4l2 device */
> + m2m2->v4l2_dev.mdev = &m2m2->media_dev;
> + m2m2->v4l2_dev.ctrl_handler = m2m2->ctrl_handler;
> + r = v4l2_device_register(m2m2->dev, &m2m2->v4l2_dev);
> + if (r) {
> + dev_err(m2m2->dev, "failed to register V4L2 device (%d)\n", r);
> + goto fail_v4l2_dev;
> + }
> +
> + /* Initialize subdev media entity */
> + m2m2->subdev_pads = kzalloc(sizeof(*m2m2->subdev_pads) *
> + m2m2->num_nodes, GFP_KERNEL);
> + if (!m2m2->subdev_pads) {
> + r = -ENOMEM;
> + goto fail_subdev_pads;
> + }
> + r = media_entity_pads_init(&m2m2->subdev.entity, m2m2->num_nodes,
> + m2m2->subdev_pads);
> + if (r) {
> + dev_err(m2m2->dev,
> + "failed initialize subdev media entity (%d)\n", r);
> + goto fail_media_entity;
> + }
> + m2m2->subdev.entity.ops = &ipu3_media_ops;
> + for (i = 0; i < m2m2->num_nodes; i++) {
> + m2m2->subdev_pads[i].flags = m2m2->nodes[i].output ?
> + MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
> + }
> +
> + /* Initialize subdev */
> + v4l2_subdev_init(&m2m2->subdev, &ipu3_subdev_ops);
> + m2m2->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
> + snprintf(m2m2->subdev.name, sizeof(m2m2->subdev.name),
> + "%s", m2m2->name);
> + v4l2_set_subdevdata(&m2m2->subdev, m2m2);
> + m2m2->subdev.ctrl_handler = m2m2->ctrl_handler;
> + r = v4l2_device_register_subdev(&m2m2->v4l2_dev, &m2m2->subdev);
> + if (r) {
> + dev_err(m2m2->dev, "failed initialize subdev (%d)\n", r);
> + goto fail_subdev;
> + }
> + r = v4l2_device_register_subdev_nodes(&m2m2->v4l2_dev);
> + if (r) {
> + dev_err(m2m2->dev, "failed to register subdevs (%d)\n", r);
> + goto fail_subdevs;
> + }
> +
> + /* Create video nodes and links */
> + for (i = 0; i < m2m2->num_nodes; i++) {
> + struct imgu_video_device *node = &m2m2->nodes[i];
> + struct video_device *vdev = &node->vdev;
> + struct vb2_queue *vbq = &node->vbq;
> + struct v4l2_mbus_framefmt *fmt;
> + u32 flags;
> +
> + /* Initialize miscellaneous variables */
> + mutex_init(&node->lock);
> + INIT_LIST_HEAD(&node->buffers);
> +
> + /* Initialize formats to default values */
> + fmt = &node->pad_fmt;
> + fmt->width = 352;
> + fmt->height = 288;
> + fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
> + fmt->field = V4L2_FIELD_NONE;
> + fmt->colorspace = V4L2_COLORSPACE_RAW;
> + fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
> + fmt->quantization = V4L2_QUANTIZATION_DEFAULT;
> + fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT;
> + fmt = &node->pad_fmt;
> + node->vdev_fmt.type = node->output ?
> + V4L2_BUF_TYPE_VIDEO_OUTPUT :
> + V4L2_BUF_TYPE_VIDEO_CAPTURE;
> + node->vdev_fmt.fmt.pix.width = fmt->width;
> + node->vdev_fmt.fmt.pix.height = fmt->height;
> + node->vdev_fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
> + node->vdev_fmt.fmt.pix.field = fmt->field;
> + node->vdev_fmt.fmt.pix.bytesperline = fmt->width * 2;
> + node->vdev_fmt.fmt.pix.sizeimage =
> + node->vdev_fmt.fmt.pix.bytesperline * fmt->height;
> + node->vdev_fmt.fmt.pix.colorspace = fmt->colorspace;
> + node->vdev_fmt.fmt.pix.priv = 0;
> + node->vdev_fmt.fmt.pix.flags = 0;
> + node->vdev_fmt.fmt.pix.ycbcr_enc = fmt->ycbcr_enc;
> + node->vdev_fmt.fmt.pix.quantization = fmt->quantization;
> + node->vdev_fmt.fmt.pix.xfer_func = fmt->xfer_func;
> +
> + /* Initialize media entities */
> + r = media_entity_pads_init(&vdev->entity, 1, &node->vdev_pad);
> + if (r) {
> + dev_err(m2m2->dev,
> + "failed initialize media entity (%d)\n", r);
> + goto fail_vdev_media_entity;
> + }
> + node->vdev_pad.flags = node->output ?
> + MEDIA_PAD_FL_SOURCE : MEDIA_PAD_FL_SINK;
> + vdev->entity.ops = NULL;
> +
> + /* Initialize vbq */
> + vbq->type = node->output ?
> + V4L2_BUF_TYPE_VIDEO_OUTPUT : V4L2_BUF_TYPE_VIDEO_CAPTURE;
You should use a META_CAPTURE buffer type for the statistics. META_OUTPUT
for the parameters (I'll cc you to the patches shortly).
--
Kind regards,
Sakari Ailus
e-mail: sakari.ai...@iki.fi XMPP: sai...@retiisi.org.uk
