ipu3 imgu video device based on v4l2, vb2 and
media controller framework.
Signed-off-by: Yong Zhi <yong.zhi@xxxxxxxxx>
---
drivers/media/pci/intel/ipu3/ipu3-v4l2.c | 727 +++++++++++++++++++++++++++++++
1 file changed, 727 insertions(+)
create mode 100644 drivers/media/pci/intel/ipu3/ipu3-v4l2.c
diff --git a/drivers/media/pci/intel/ipu3/ipu3-v4l2.c b/drivers/media/pci/intel/ipu3/ipu3-v4l2.c
new file mode 100644
index 0000000..c9493dc
--- /dev/null
+++ b/drivers/media/pci/intel/ipu3/ipu3-v4l2.c
@@ -0,0 +1,727 @@
+/*
+ * Copyright (c) 2017 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "ipu3.h"
+
+/******************** v4l2_subdev_ops ********************/
+
+static int ipu3_subdev_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct ipu3_mem2mem2_device *m2m2 =
+ container_of(sd, struct ipu3_mem2mem2_device, subdev);
+ int r = 0;
+
+ if (m2m2->ops && m2m2->ops->s_stream)
+ r = m2m2->ops->s_stream(m2m2, enable);
+
+ if (!r)
+ m2m2->streaming = enable;
+
+ return r;
+}
+
+static int ipu3_subdev_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct ipu3_mem2mem2_device *m2m2 =
+ container_of(sd, struct ipu3_mem2mem2_device, subdev);
+ struct v4l2_mbus_framefmt *mf;
+ u32 pad = fmt->pad;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
+ fmt->format = m2m2->nodes[pad].pad_fmt;
+ } else {
+ mf = v4l2_subdev_get_try_format(sd, cfg, pad);
+ fmt->format = *mf;
+ }
+
+ return 0;
+}
+
+static int ipu3_subdev_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct ipu3_mem2mem2_device *m2m2 =
+ container_of(sd, struct ipu3_mem2mem2_device, subdev);
+ struct v4l2_mbus_framefmt *mf;
+ u32 pad = fmt->pad;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
+ mf = v4l2_subdev_get_try_format(sd, cfg, pad);
+ else
+ mf = &m2m2->nodes[pad].pad_fmt;
+
+ /* Clamp the w and h based on the hardware capabilities */
+ if (m2m2->subdev_pads[pad].flags & MEDIA_PAD_FL_SOURCE) {
+
+ fmt->format.width = clamp(fmt->format.width,
+ IPU3_OUTPUT_MIN_WIDTH,
+ IPU3_OUTPUT_MAX_WIDTH);
+ fmt->format.height = clamp(fmt->format.height,
+ IPU3_OUTPUT_MIN_HEIGHT,
+ IPU3_OUTPUT_MAX_HEIGHT);
+ } else {
+ fmt->format.width = clamp(fmt->format.width,
+ IPU3_INPUT_MIN_WIDTH,
+ IPU3_INPUT_MAX_WIDTH);
+ fmt->format.height = clamp(fmt->format.height,
+ IPU3_INPUT_MIN_HEIGHT,
+ IPU3_INPUT_MAX_HEIGHT);
+ }
+
+ *mf = fmt->format;
+
+ return 0;
+}
+
+/******************** media_entity_operations ********************/
+
+static int ipu3_link_setup(struct media_entity *entity,
+ const struct media_pad *local,
+ const struct media_pad *remote, u32 flags)
+{
+ struct ipu3_mem2mem2_device *m2m2 =
+ container_of(entity, struct ipu3_mem2mem2_device, subdev.entity);
+ u32 pad = local->index;
+
+ WARN_ON(pad >= m2m2->num_nodes);
+
+ m2m2->nodes[pad].enabled = !!(flags & MEDIA_LNK_FL_ENABLED);
+
+ return 0;
+}
+
+/******************** vb2_ops ********************/
+
+/* Transfer buffer ownership to me */
+static void ipu3_vb2_buf_queue(struct vb2_buffer *vb)
+{
+ struct ipu3_mem2mem2_device *m2m2 = vb2_get_drv_priv(vb->vb2_queue);
+ struct imgu_device *imgu =
+ container_of(m2m2, struct imgu_device, mem2mem2);
+ struct imgu_video_device *node =
+ container_of(vb->vb2_queue, struct imgu_video_device, vbq);
+ int queue;
+
+ queue = imgu_node_to_queue(node - m2m2->nodes);
+
+ if (queue < 0) {
+ dev_err(&imgu->pci_dev->dev, "Invalid imgu node.\n");
+ return;
+ }
+
+ if (queue == IPU3_CSS_QUEUE_PARAMS) {
+ unsigned int need_bytes = sizeof(struct ipu3_uapi_params);
+ struct vb2_v4l2_buffer *buf =
+ container_of(vb, struct vb2_v4l2_buffer, vb2_buf);
+ int r = -EINVAL;
+
+ if (vb2_get_plane_payload(vb, 0) >= need_bytes)
+ r = ipu3_css_set_parameters(&imgu->css,
+ vb2_plane_vaddr(vb, 0),
+ NULL, 0, NULL, 0);
+ buf->flags = V4L2_BUF_FLAG_DONE;
+ vb2_buffer_done(vb, r == 0 ? VB2_BUF_STATE_DONE
+ : VB2_BUF_STATE_ERROR);
+
+ } else {
+ struct imgu_buffer *buf = container_of(vb,
+ struct imgu_buffer, m2m2_buf.vbb.vb2_buf);
+ dma_addr_t daddr = vb2_dma_contig_plane_dma_addr(vb, 0);
+
+ mutex_lock(&imgu->lock);
+ ipu3_css_buf_init(&buf->css_buf, queue, daddr);
+ list_add_tail(&buf->m2m2_buf.list,
+ &m2m2->nodes[node - m2m2->nodes].buffers);
+ mutex_unlock(&imgu->lock);
+
+ if (imgu->mem2mem2.streaming)
+ imgu_queue_buffers(imgu, false);
+ }
+}
+
+static int ipu3_vb2_queue_setup(struct vb2_queue *vq,
+ unsigned int *num_buffers,
+ unsigned int *num_planes,
+ unsigned int sizes[],
+ struct device *alloc_devs[])
+{
+ struct ipu3_mem2mem2_device *m2m2 = vb2_get_drv_priv(vq);
+ struct imgu_video_device *node =
+ container_of(vq, struct imgu_video_device, vbq);
+ const struct v4l2_format *fmt = &node->vdev_fmt;
+ const struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+ alloc_devs[0] = m2m2->vb2_alloc_dev;
+
+ if (*num_planes) {
+ /*
+ * Only single plane is supported
+ */
+ if (*num_planes != 1 || sizes[0] < pix->sizeimage)
+ return -EINVAL;
+ }
+
+ *num_planes = 1;
+ sizes[0] = pix->sizeimage;
+ *num_buffers = clamp_val(*num_buffers, 1, VB2_MAX_FRAME);
+
+ /* Initialize buffer queue */
+
+ INIT_LIST_HEAD(&node->buffers);
+
+ return 0;
+}
+
+/* Check if all enabled video nodes are streaming, exception ignored */
+static bool ipu3_all_nodes_streaming(struct ipu3_mem2mem2_device *m2m2,
+ struct imgu_video_device *except)
+{
+ int i;
+
+ for (i = 0; i < m2m2->num_nodes; i++) {
+ struct imgu_video_device *node = &m2m2->nodes[i];
+
+ if (node == except)
+ continue;
+ if (node->enabled && !vb2_start_streaming_called(&node->vbq))
+ return false;
+ }
+
+ return true;
+}
+
+static void ipu3_return_all_buffers(struct ipu3_mem2mem2_device *m2m2,
+ struct imgu_video_device *node,
+ enum vb2_buffer_state state)
+{
+ struct ipu3_mem2mem2_buffer *b, *b0;
+
+ /* Return all buffers */
+ list_for_each_entry_safe(b, b0, &node->buffers, list) {
+ list_del(&b->list);
+ vb2_buffer_done(&b->vbb.vb2_buf, state);
+ }
+}
+
+static int ipu3_vb2_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct ipu3_mem2mem2_device *m2m2 = vb2_get_drv_priv(vq);
+ struct imgu_video_device *node =
+ container_of(vq, struct imgu_video_device, vbq);
+ int r;
+
+ if (m2m2->streaming) {
+ r = -EBUSY;
+ goto fail_return_bufs;
+ }
+
+ if (!node->enabled) {
+ r = -EINVAL;
+ goto fail_return_bufs;
+ }
+
+ r = media_pipeline_start(&node->vdev.entity, &m2m2->pipeline);
+ if (r < 0)
+ goto fail_return_bufs;
+
+ if (!ipu3_all_nodes_streaming(m2m2, node))
+ return 0;
+
+ /* Start streaming of the whole pipeline now */
+
+ r = v4l2_subdev_call(&m2m2->subdev, video, s_stream, 1);
+ if (r < 0)
+ goto fail_stop_pipeline;
+
+ return 0;
+
+fail_stop_pipeline:
+ media_pipeline_stop(&node->vdev.entity);
+fail_return_bufs:
+ ipu3_return_all_buffers(m2m2, node, VB2_BUF_STATE_QUEUED);
+
+ return r;
+}
+
+static void ipu3_vb2_stop_streaming(struct vb2_queue *vq)
+{
+ struct ipu3_mem2mem2_device *m2m2 = vb2_get_drv_priv(vq);
+ struct imgu_video_device *node =
+ container_of(vq, struct imgu_video_device, vbq);
+ int r;
+
+ WARN_ON(!node->enabled);
+
+ /* Was this the first node with streaming disabled? */
+ if (ipu3_all_nodes_streaming(m2m2, node)) {
+ /* Yes, really stop streaming now */
+ r = v4l2_subdev_call(&m2m2->subdev, video, s_stream, 0);
+ if (r)
+ dev_err(m2m2->dev, "failed to stop streaming\n");
+ }
+
+ ipu3_return_all_buffers(m2m2, node, VB2_BUF_STATE_ERROR);
+ media_pipeline_stop(&node->vdev.entity);
+
+}
+
+/******************** v4l2_ioctl_ops ********************/
+
+static int ipu3_videoc_querycap(struct file *file, void *fh,
+ struct v4l2_capability *cap)
+{
+ struct ipu3_mem2mem2_device *m2m2 = video_drvdata(file);
+ struct imgu_video_device *node = file_to_intel_ipu3_node(file);
+
+ strlcpy(cap->driver, m2m2->name, sizeof(cap->driver));
+ strlcpy(cap->card, m2m2->model, sizeof(cap->card));
+ snprintf(cap->bus_info, sizeof(cap->bus_info), "%s", node->name);
+ cap->device_caps = V4L2_CAP_STREAMING;
+ cap->device_caps |= node->output ?
+ V4L2_CAP_VIDEO_OUTPUT : V4L2_CAP_VIDEO_CAPTURE;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+
+ return 0;
+}
+
+/* Propagate forward always the format from the CIO2 subdev */
+static int ipu3_videoc_g_fmt(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct imgu_video_device *node = file_to_intel_ipu3_node(file);
+
+ f->fmt = node->vdev_fmt.fmt;
+
+ return 0;
+}
+
+/*
+ * Set input/output format. Unless it is just a try, this also resets
+ * selections (ie. effective and BDS resolutions) to defaults.
+ */
+static int mem2mem2_fmt(struct ipu3_mem2mem2_device *m2m2_dev,
+ int node, struct v4l2_format *f, bool try)
+{
+ struct imgu_device *imgu =
+ container_of(m2m2_dev, struct imgu_device, mem2mem2);
+ struct v4l2_pix_format try_fmts[IPU3_CSS_QUEUES];
+ struct v4l2_pix_format *fmts[IPU3_CSS_QUEUES];
+ struct v4l2_rect *rects[IPU3_CSS_RECTS] = { NULL };
+ unsigned int i;
+ int css_q, r;
+
+ if (m2m2_dev->nodes[IMGU_NODE_PV].enabled &&
+ m2m2_dev->nodes[IMGU_NODE_VF].enabled) {
+ dev_err(&imgu->pci_dev->dev,
+ "Postview and vf are not supported simultaneously\n");
+ return -EINVAL;
+ }
+ /*
+ * Tell css that the vf q is used for PV
+ */
+ if (m2m2_dev->nodes[IMGU_NODE_PV].enabled)
+ imgu->css.vf_output_en = IPU3_NODE_PV_ENABLED;
+ else
+ imgu->css.vf_output_en = IPU3_NODE_VF_ENABLED;
+
+ for (i = 0; i < IPU3_CSS_QUEUES; i++) {
+ int inode = imgu_map_node(imgu, i);
+
+ if (inode < 0)
+ return -EINVAL;
+ if (try) {
+ try_fmts[i] = m2m2_dev->nodes[inode].vdev_fmt.fmt.pix;
+ fmts[i] = &try_fmts[i];
+ } else {
+ fmts[i] = &m2m2_dev->nodes[inode].vdev_fmt.fmt.pix;
+ }
+
+ /* CSS expects some format on OUT queue */
+ if (i != IPU3_CSS_QUEUE_OUT &&
+ !m2m2_dev->nodes[inode].enabled && inode != node)
+ fmts[i] = NULL;
+ }
+
+ if (!try) {
+ memset(&imgu->rect, 0, sizeof(imgu->rect));
+ rects[IPU3_CSS_RECT_EFFECTIVE] = &imgu->rect.eff;
+ rects[IPU3_CSS_RECT_BDS] = &imgu->rect.bds;
+ }
+
+ /*
+ * ipu3_mem2mem2 doesn't set the node to the value given by user
+ * before we return success from this function, so set it here.
+ */
+ css_q = imgu_node_to_queue(node);
+ *fmts[css_q] = f->fmt.pix;
+
+ if (try)
+ r = ipu3_css_fmt_try(&imgu->css, fmts, rects);
+ else
+ r = ipu3_css_fmt_set(&imgu->css, fmts, rects);
+
+ /* fmt_try returns the binary number in the firmware blob */
+ return r < 0 ? r : 0;
+}
+
+static int ipu3_videoc_try_fmt(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct ipu3_mem2mem2_device *m2m2 = video_drvdata(file);
+ struct imgu_video_device *node = file_to_intel_ipu3_node(file);
+
+ return mem2mem2_fmt(m2m2, node - m2m2->nodes, f, true);
+}
+
+static int ipu3_videoc_s_fmt(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct ipu3_mem2mem2_device *m2m2 = video_drvdata(file);
+ struct imgu_video_device *node = file_to_intel_ipu3_node(file);
+ int r;
+
+ r = mem2mem2_fmt(m2m2, node - m2m2->nodes, f, false);
+ if (!r)
+ f->fmt = node->vdev_fmt.fmt;
+
+ return r;
+}
+
+/******************** function pointers ********************/
+
+static const struct v4l2_subdev_video_ops ipu3_subdev_video_ops = {
+ .s_stream = ipu3_subdev_s_stream,
+};
+
+static const struct v4l2_subdev_pad_ops ipu3_subdev_pad_ops = {
+ .link_validate = v4l2_subdev_link_validate_default,
+ .get_fmt = ipu3_subdev_get_fmt,
+ .set_fmt = ipu3_subdev_set_fmt,
+};
+
+static const struct v4l2_subdev_ops ipu3_subdev_ops = {
+ .video = &ipu3_subdev_video_ops,
+ .pad = &ipu3_subdev_pad_ops,
+};
+
+static const struct media_entity_operations ipu3_media_ops = {
+ .link_setup = ipu3_link_setup,
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+/****************** vb2_ops of the Q ********************/
+
+static const struct vb2_ops ipu3_vb2_ops = {
+ .buf_queue = ipu3_vb2_buf_queue,
+ .queue_setup = ipu3_vb2_queue_setup,
+ .start_streaming = ipu3_vb2_start_streaming,
+ .stop_streaming = ipu3_vb2_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+/****************** v4l2_file_operations *****************/
+
+static const struct v4l2_file_operations ipu3_v4l2_fops = {
+ .unlocked_ioctl = video_ioctl2,
+ .open = v4l2_fh_open,
+ .release = vb2_fop_release,
+ .poll = vb2_fop_poll,
+ .mmap = vb2_fop_mmap,
+};
+
+/******************** v4l2_ioctl_ops ********************/
+
+static const struct v4l2_ioctl_ops ipu3_v4l2_ioctl_ops = {
+ .vidioc_querycap = ipu3_videoc_querycap,
+
+ .vidioc_g_fmt_vid_cap = ipu3_videoc_g_fmt,
+ .vidioc_s_fmt_vid_cap = ipu3_videoc_s_fmt,
+ .vidioc_try_fmt_vid_cap = ipu3_videoc_try_fmt,
+
+ .vidioc_g_fmt_vid_out = ipu3_videoc_g_fmt,
+ .vidioc_s_fmt_vid_out = ipu3_videoc_s_fmt,
+ .vidioc_try_fmt_vid_out = ipu3_videoc_try_fmt,
+
+ /* buffer queue management */
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+};
+
+/******************** Framework registration ********************/
+
+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;
+ vbq->io_modes = VB2_USERPTR | VB2_MMAP;
+ vbq->ops = &ipu3_vb2_ops;
+ vbq->mem_ops = m2m2->vb2_mem_ops;
+ if (m2m2->buf_struct_size <= 0)
+ m2m2->buf_struct_size =
+ sizeof(struct ipu3_mem2mem2_buffer);
+ vbq->buf_struct_size = m2m2->buf_struct_size;
+ vbq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ vbq->min_buffers_needed = 0; /* Can streamon w/o buffers */
+ vbq->drv_priv = m2m2;
+ vbq->lock = &node->lock;
+ r = vb2_queue_init(vbq);
+ if (r) {
+ dev_err(m2m2->dev,
+ "failed to initialize video queue (%d)\n", r);
+ goto fail_vdev;
+ }
+
+ /* Initialize vdev */
+ strlcpy(vdev->name, node->name, sizeof(vdev->name));
+ vdev->release = video_device_release_empty;
+ vdev->fops = &m2m2->v4l2_file_ops;
+ vdev->ioctl_ops = &ipu3_v4l2_ioctl_ops;
+ vdev->lock = &node->lock;
+ vdev->v4l2_dev = &m2m2->v4l2_dev;
+ vdev->queue = &node->vbq;
+ vdev->vfl_dir = node->output ? VFL_DIR_TX : VFL_DIR_RX;
+ video_set_drvdata(vdev, m2m2);
+ r = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
+ if (r) {
+ dev_err(m2m2->dev,
+ "failed to register video device (%d)\n", r);
+ goto fail_vdev;
+ }
+
+ /* Create link between video node and the subdev pad */
+ flags = 0;
+ if (node->enabled)
+ flags |= MEDIA_LNK_FL_ENABLED;
+ if (node->immutable)
+ flags |= MEDIA_LNK_FL_IMMUTABLE;
+ if (node->output) {
+ r = media_create_pad_link(
+ &vdev->entity, 0,
+ &m2m2->subdev.entity,
+ i, flags);
+ } else {
+ r = media_create_pad_link(
+ &m2m2->subdev.entity,
+ i, &vdev->entity, 0,
+ flags);
+ }
+ if (r)
+ goto fail_link;
+
+ }
+
+ return 0;
+
+ for (; i >= 0; i--) {
+fail_link:
+ video_unregister_device(&m2m2->nodes[i].vdev);
+fail_vdev:
+ media_entity_cleanup(&m2m2->nodes[i].vdev.entity);
+fail_vdev_media_entity:
+ mutex_destroy(&m2m2->nodes[i].lock);
+ }
+fail_subdevs:
+ v4l2_device_unregister_subdev(&m2m2->subdev);
+fail_subdev:
+ media_entity_cleanup(&m2m2->subdev.entity);
+fail_media_entity:
+ kfree(m2m2->subdev_pads);
+fail_subdev_pads:
+ v4l2_device_unregister(&m2m2->v4l2_dev);
+fail_v4l2_dev:
+ media_device_unregister(&m2m2->media_dev);
+ media_device_cleanup(&m2m2->media_dev);
+fail_media_dev:
+
+ return r;
+}
+EXPORT_SYMBOL_GPL(ipu3_v4l2_register);
+
+int ipu3_v4l2_unregister(struct imgu_device *dev)
+{
+ struct ipu3_mem2mem2_device *m2m2 = &dev->mem2mem2;
+ unsigned int i;
+
+ for (i = 0; i < m2m2->num_nodes; i++) {
+ video_unregister_device(&m2m2->nodes[i].vdev);
+ media_entity_cleanup(&m2m2->nodes[i].vdev.entity);
+ mutex_destroy(&m2m2->nodes[i].lock);
+ }
+
+ v4l2_device_unregister_subdev(&m2m2->subdev);
+ media_entity_cleanup(&m2m2->subdev.entity);
+ kfree(m2m2->subdev_pads);
+ v4l2_device_unregister(&m2m2->v4l2_dev);
+ media_device_unregister(&m2m2->media_dev);
+ media_device_cleanup(&m2m2->media_dev);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ipu3_v4l2_unregister);
+
+void ipu3_v4l2_buffer_done(struct vb2_buffer *vb,
+ enum vb2_buffer_state state)
+{
+ struct ipu3_mem2mem2_buffer *b =
+ container_of(vb, struct ipu3_mem2mem2_buffer, vbb.vb2_buf);
+
+ list_del(&b->list);
+ vb2_buffer_done(&b->vbb.vb2_buf, state);
+};
+EXPORT_SYMBOL_GPL(ipu3_v4l2_buffer_done);
+
+MODULE_AUTHOR("Tuukka Toivonen <tuukka.toivonen@xxxxxxxxx>");
+MODULE_AUTHOR("Tianshu Qiu <tian.shu.qiu@xxxxxxxxx>");
+MODULE_AUTHOR("Jian Xu Zheng <jian.xu.zheng@xxxxxxxxx>");
+MODULE_AUTHOR("Yuning Pu <yuning.pu@xxxxxxxxx>");
+MODULE_AUTHOR("Yong Zhi <yong.zhi@xxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Intel IPU3 Camera Sub-system (ImgU) driver");
--
2.7.4
