Implement video driver that utilizes v4l2, vb2 queue support
and media controller APIs. The driver exposes single subdevice and
six nodes.
Signed-off-by: Yong Zhi <yong....@intel.com>
---
drivers/staging/media/ipu3/ipu3-v4l2.c | 1086 ++++++++++++++++++++++++++++++++
1 file changed, 1086 insertions(+)
create mode 100644 drivers/staging/media/ipu3/ipu3-v4l2.c
diff --git a/drivers/staging/media/ipu3/ipu3-v4l2.c
b/drivers/staging/media/ipu3/ipu3-v4l2.c
new file mode 100644
index 000000000000..038ee749cb75
--- /dev/null
+++ b/drivers/staging/media/ipu3/ipu3-v4l2.c
@@ -0,0 +1,1086 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Intel Corporation
+
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+
+#include <media/v4l2-ioctl.h>
+
+#include "ipu3.h"
+#include "ipu3-dmamap.h"
+
+/******************** v4l2_subdev_ops ********************/
+
+static int ipu3_subdev_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct v4l2_rect try_crop = {
+ .top = 0,
+ .left = 0,
+ .width = 1920,
+ .height = 1080,
+ };
+ unsigned int i;
+
+ /* Initialize try_fmt */
+ for (i = 0; i < IMGU_NODE_NUM; i++) {
+ struct v4l2_mbus_framefmt *try_fmt =
+ v4l2_subdev_get_try_format(sd, fh->pad, i);
+
+ try_fmt->width = try_crop.width;
+ try_fmt->height = try_crop.height;
+ try_fmt->code = MEDIA_BUS_FMT_FIXED;
+ try_fmt->colorspace = V4L2_COLORSPACE_RAW;
+ try_fmt->field = V4L2_FIELD_NONE;
+ }
+
+ *v4l2_subdev_get_try_crop(sd, fh->pad, IMGU_NODE_IN) = try_crop;
+ *v4l2_subdev_get_try_compose(sd, fh->pad, IMGU_NODE_IN) = try_crop;
+
+ return 0;
+}
+
+static int ipu3_subdev_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct imgu_device *imgu = container_of(sd, struct imgu_device, subdev);
+ int r = 0;
+
+ r = imgu_s_stream(imgu, enable);
+ if (!r)
+ imgu->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 imgu_device *imgu = container_of(sd, struct imgu_device, subdev);
+ struct v4l2_mbus_framefmt *mf;
+ u32 pad = fmt->pad;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
+ fmt->format = imgu->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 imgu_device *imgu = container_of(sd, struct imgu_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 = &imgu->nodes[pad].pad_fmt;
+
+ fmt->format.code = mf->code;
+ /* Clamp the w and h based on the hardware capabilities */
+ if (imgu->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;
+}
+
+static int ipu3_subdev_get_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_selection *sel)
+{
+ struct imgu_device *imgu = container_of(sd, struct imgu_device, subdev);
+ struct v4l2_rect *try_sel, *r;
+
+ if (sel->pad != IMGU_NODE_IN)
+ return -EINVAL;
+
+ switch (sel->target) {
+ case V4L2_SEL_TGT_CROP:
+ try_sel = v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
+ r = &imgu->rect.eff;
+ break;
+ case V4L2_SEL_TGT_COMPOSE:
+ try_sel = v4l2_subdev_get_try_compose(sd, cfg, sel->pad);
+ r = &imgu->rect.bds;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (sel->which == V4L2_SUBDEV_FORMAT_TRY)
+ sel->r = *try_sel;
+ else
+ sel->r = *r;
+
+ return 0;
+}
+
+static int ipu3_subdev_set_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_selection *sel)
+{
+ struct imgu_device *imgu = container_of(sd, struct imgu_device, subdev);
+ struct v4l2_rect *rect, *try_sel;
+
+ if (sel->pad != IMGU_NODE_IN)
+ return -EINVAL;
+
+ switch (sel->target) {
+ case V4L2_SEL_TGT_CROP:
+ try_sel = v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
+ rect = &imgu->rect.eff;
+ break;
+ case V4L2_SEL_TGT_COMPOSE:
+ try_sel = v4l2_subdev_get_try_compose(sd, cfg, sel->pad);
+ rect = &imgu->rect.bds;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (sel->which == V4L2_SUBDEV_FORMAT_TRY)
+ *try_sel = sel->r;
+ else
+ *rect = sel->r;
+
+ 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 imgu_device *imgu = container_of(entity, struct imgu_device,
+ subdev.entity);
+ u32 pad = local->index;
+
+ WARN_ON(pad >= IMGU_NODE_NUM);
+
+ imgu->nodes[pad].enabled = flags & MEDIA_LNK_FL_ENABLED;
+
+ return 0;
+}
+
+/******************** vb2_ops ********************/
+
+static int ipu3_vb2_buf_init(struct vb2_buffer *vb)
+{
+ struct sg_table *sg = vb2_dma_sg_plane_desc(vb, 0);
+ struct imgu_device *imgu = vb2_get_drv_priv(vb->vb2_queue);
+ struct imgu_buffer *buf = container_of(vb,
+ struct imgu_buffer, vid_buf.vbb.vb2_buf);
+ struct imgu_video_device *node =
+ container_of(vb->vb2_queue, struct imgu_video_device, vbq);
+ unsigned int queue = imgu_node_to_queue(node - imgu->nodes);
+
+ if (queue == IPU3_CSS_QUEUE_PARAMS)
+ return 0;
+
+ return ipu3_dmamap_map_sg(imgu, sg->sgl, sg->nents, &buf->map);
+}
+
+/* Called when each buffer is freed */
+static void ipu3_vb2_buf_cleanup(struct vb2_buffer *vb)
+{
+ struct imgu_device *imgu = vb2_get_drv_priv(vb->vb2_queue);
+ struct imgu_buffer *buf = container_of(vb,
+ struct imgu_buffer, vid_buf.vbb.vb2_buf);
+ struct imgu_video_device *node =
+ container_of(vb->vb2_queue, struct imgu_video_device, vbq);
+ unsigned int queue = imgu_node_to_queue(node - imgu->nodes);
+
+ if (queue == IPU3_CSS_QUEUE_PARAMS)
+ return;
+
+ ipu3_dmamap_unmap(imgu, &buf->map);
+}
+
+/* Transfer buffer ownership to me */
+static void ipu3_vb2_buf_queue(struct vb2_buffer *vb)
+{
+ struct imgu_device *imgu = vb2_get_drv_priv(vb->vb2_queue);
+ struct imgu_video_device *node =
+ container_of(vb->vb2_queue, struct imgu_video_device, vbq);
+ unsigned int queue = imgu_node_to_queue(node - imgu->nodes);
+ unsigned long need_bytes;
+
+ if (vb->vb2_queue->type == V4L2_BUF_TYPE_META_CAPTURE ||
+ vb->vb2_queue->type == V4L2_BUF_TYPE_META_OUTPUT)
+ need_bytes = node->vdev_fmt.fmt.meta.buffersize;
+ else
+ need_bytes = node->vdev_fmt.fmt.pix_mp.plane_fmt[0].sizeimage;
+
+ if (queue == IPU3_CSS_QUEUE_PARAMS) {
+ unsigned long payload = vb2_get_plane_payload(vb, 0);
+ struct vb2_v4l2_buffer *buf =
+ container_of(vb, struct vb2_v4l2_buffer, vb2_buf);
+ int r = -EINVAL;
+
+ if (payload == 0) {
+ payload = need_bytes;
+ vb2_set_plane_payload(vb, 0, payload);
+ }
+ if (payload >= need_bytes)
+ r = ipu3_css_set_parameters(&imgu->css,
+ vb2_plane_vaddr(vb, 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,
+ vid_buf.vbb.vb2_buf);
+
+ mutex_lock(&imgu->lock);
+ ipu3_css_buf_init(&buf->css_buf, queue, buf->map.daddr);
+ list_add_tail(&buf->vid_buf.list,
+ &imgu->nodes[node - imgu->nodes].buffers);
+ mutex_unlock(&imgu->lock);
+
+ vb2_set_plane_payload(&buf->vid_buf.vbb.vb2_buf, 0, need_bytes);
+
+ if (imgu->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 imgu_device *imgu = 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;
+ unsigned int size;
+
+ *num_buffers = clamp_val(*num_buffers, 1, VB2_MAX_FRAME);
+ alloc_devs[0] = &imgu->pci_dev->dev;
+
+ if (vq->type == V4L2_BUF_TYPE_META_CAPTURE ||
+ vq->type == V4L2_BUF_TYPE_META_OUTPUT)
+ size = fmt->fmt.meta.buffersize;
+ else
+ size = fmt->fmt.pix_mp.plane_fmt[0].sizeimage;
+
+ if (*num_planes) {
+ if (sizes[0] < size)
+ return -EINVAL;
+ size = sizes[0];
+ }
+
+ *num_planes = 1;
+ sizes[0] = size;
+ /* 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 imgu_device *imgu,
+ struct imgu_video_device *except)
+{
+ unsigned int i;
+
+ for (i = 0; i < IMGU_NODE_NUM; i++) {
+ struct imgu_video_device *node = &imgu->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 imgu_device *imgu,
+ struct imgu_video_device *node,
+ enum vb2_buffer_state state)
+{
+ struct ipu3_vb2_buffer *b, *b0;
+
+ /* Return all buffers */
+ mutex_lock(&imgu->lock);
+ list_for_each_entry_safe(b, b0, &node->buffers, list) {
+ list_del(&b->list);
+ vb2_buffer_done(&b->vbb.vb2_buf, state);
+ }
+ mutex_unlock(&imgu->lock);
+}
+
+static int ipu3_vb2_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct imgu_device *imgu = vb2_get_drv_priv(vq);
+ struct imgu_video_device *node =
+ container_of(vq, struct imgu_video_device, vbq);
+ int r;
+
+ if (imgu->streaming) {
+ r = -EBUSY;
+ goto fail_return_bufs;
+ }
+
+ if (!node->enabled) {
+ r = -EINVAL;
+ goto fail_return_bufs;
+ }
+ r = media_pipeline_start(&node->vdev.entity, &imgu->pipeline);
+ if (r < 0)
+ goto fail_return_bufs;
+
+ if (!ipu3_all_nodes_streaming(imgu, node))
+ return 0;
+
+ /* Start streaming of the whole pipeline now */
+
+ r = v4l2_subdev_call(&imgu->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(imgu, node, VB2_BUF_STATE_QUEUED);
+
+ return r;
+}
+
+static void ipu3_vb2_stop_streaming(struct vb2_queue *vq)
+{
+ struct imgu_device *imgu = 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(imgu, node)) {
+ /* Yes, really stop streaming now */
+ r = v4l2_subdev_call(&imgu->subdev, video, s_stream, 0);
+ if (r)
+ dev_err(&imgu->pci_dev->dev,
+ "failed to stop streaming\n");
+ }
+
+ ipu3_return_all_buffers(imgu, node, VB2_BUF_STATE_ERROR);
+ media_pipeline_stop(&node->vdev.entity);
+}
+
+/******************** v4l2_ioctl_ops ********************/
+
+#define VID_CAPTURE 0
+#define VID_OUTPUT 1
+#define DEF_VID_CAPTURE 0
+#define DEF_VID_OUTPUT 1
+
+struct ipu3_fmt {
+ u32 fourcc;
+ u16 type; /* VID_CAPTURE or VID_OUTPUT not both */
+};
+
+/* format descriptions for capture and preview */
+static const struct ipu3_fmt formats[] = {
+ { V4L2_PIX_FMT_NV12, VID_CAPTURE },
+ { V4L2_PIX_FMT_IPU3_SGRBG10, VID_OUTPUT },
+ { V4L2_PIX_FMT_IPU3_SBGGR10, VID_OUTPUT },
+ { V4L2_PIX_FMT_IPU3_SGBRG10, VID_OUTPUT },
+ { V4L2_PIX_FMT_IPU3_SRGGB10, VID_OUTPUT },
+};
+
+/* Find the first matched format, return default if not found */
+static const struct ipu3_fmt *find_format(struct v4l2_format *f, u32 type)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(formats); i++) {
+ if (formats[i].fourcc == f->fmt.pix_mp.pixelformat &&
+ formats[i].type == type)
+ return &formats[i];
+ }
+
+ return type == VID_CAPTURE ? &formats[DEF_VID_CAPTURE] :
+ &formats[DEF_VID_OUTPUT];
+}
+
+static int ipu3_vidioc_querycap(struct file *file, void *fh,
+ struct v4l2_capability *cap)
+{
+ struct imgu_video_device *node = file_to_intel_ipu3_node(file);
+
+ strscpy(cap->driver, IMGU_NAME, sizeof(cap->driver));
+ strscpy(cap->card, IMGU_NAME, sizeof(cap->card));
+ snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s", node->name);
+
+ return 0;
+}
+
+static int enum_fmts(struct v4l2_fmtdesc *f, u32 type)
+{
+ unsigned int i, j;
+
+ for (i = j = 0; i < ARRAY_SIZE(formats); ++i) {
+ if (formats[i].type == type) {
+ if (j == f->index)
+ break;
+ ++j;
+ }
+ }
+
+ if (i < ARRAY_SIZE(formats)) {
+ f->pixelformat = formats[i].fourcc;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+ return -EINVAL;
+
+ return enum_fmts(f, VID_CAPTURE);
+}
+
+static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ if (f->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
+ return -EINVAL;
+
+ return enum_fmts(f, VID_OUTPUT);
+}
+
+/* Propagate forward always the format from the CIO2 subdev */
+static int ipu3_vidioc_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 imgu_fmt(struct imgu_device *imgu, int node,
+ struct v4l2_format *f, bool try)
+{
+ struct v4l2_pix_format_mplane try_fmts[IPU3_CSS_QUEUES];
+ struct v4l2_pix_format_mplane *fmts[IPU3_CSS_QUEUES] = { NULL };
+ struct v4l2_rect *rects[IPU3_CSS_RECTS] = { NULL };
+ struct v4l2_mbus_framefmt pad_fmt;
+ unsigned int i, css_q;
+ int r;
+
+ if (imgu->nodes[IMGU_NODE_PV].enabled &&
+ imgu->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 (imgu->nodes[IMGU_NODE_PV].enabled)
+ imgu->css.vf_output_en = IPU3_NODE_PV_ENABLED;
+ else if (imgu->nodes[IMGU_NODE_VF].enabled)
+ imgu->css.vf_output_en = IPU3_NODE_VF_ENABLED;
+
+ for (i = 0; i < IPU3_CSS_QUEUES; i++) {
+ unsigned int inode = imgu_map_node(imgu, i);
+
+ /* Skip the meta node */
+ if (inode == IMGU_NODE_STAT_3A || inode == IMGU_NODE_PARAMS)
+ continue;
+ /* imgu_map_node defauls to PV if VF not enabled */
+ if (inode == IMGU_NODE_PV && node == IMGU_NODE_VF &&
+ imgu->css.vf_output_en == IPU3_NODE_VF_DISABLED)
+ inode = node;
+
+ if (try) {
+ try_fmts[i] = imgu->nodes[inode].vdev_fmt.fmt.pix_mp;
+ fmts[i] = &try_fmts[i];
+ } else {
+ fmts[i] = &imgu->nodes[inode].vdev_fmt.fmt.pix_mp;
+ }
+
+ /* CSS expects some format on OUT queue */
+ if (i != IPU3_CSS_QUEUE_OUT &&
+ !imgu->nodes[inode].enabled && inode != node)
+ fmts[i] = NULL;
+ }
+
+ if (!try) {
+ /* eff and bds res got by imgu_s_sel */
+ rects[IPU3_CSS_RECT_EFFECTIVE] = &imgu->rect.eff;
+ rects[IPU3_CSS_RECT_BDS] = &imgu->rect.bds;
+ rects[IPU3_CSS_RECT_GDC] = &imgu->rect.gdc;
+
+ /* suppose that pad fmt was set by subdev s_fmt before */
+ pad_fmt = imgu->nodes[IMGU_NODE_IN].pad_fmt;
+ rects[IPU3_CSS_RECT_GDC]->width = pad_fmt.width;
+ rects[IPU3_CSS_RECT_GDC]->height = pad_fmt.height;
+ }
+
+ /*
+ * imgu 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);
+ if (fmts[css_q])
+ *fmts[css_q] = f->fmt.pix_mp;
+ else
+ return -EINVAL;
+
+ if (try)
+ r = ipu3_css_fmt_try(&imgu->css, fmts, rects);
+ else
+ r = ipu3_css_fmt_set(&imgu->css, fmts, rects);
+
+ /* r is the binary number in the firmware blob */
+ if (r < 0)
+ return r;
+
+ if (try)
+ f->fmt.pix_mp = *fmts[css_q];
+ else
+ f->fmt = imgu->nodes[node].vdev_fmt.fmt;
+
+ return 0;
+}
+
+static int ipu3_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
+{
+ struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
+ const struct ipu3_fmt *fmt;
+
+ if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+ fmt = find_format(f, VID_CAPTURE);
+ else if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
+ fmt = find_format(f, VID_OUTPUT);
+ else
+ return -EINVAL;
+
+ pixm->pixelformat = fmt->fourcc;
+
+ memset(pixm->plane_fmt[0].reserved, 0,
+ sizeof(pixm->plane_fmt[0].reserved));
+
+ return 0;
+}
+
+static int ipu3_vidioc_try_fmt(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct imgu_device *imgu = video_drvdata(file);
+ struct imgu_video_device *node = file_to_intel_ipu3_node(file);
+ int r;
+
+ r = ipu3_try_fmt(file, fh, f);
+ if (r)
+ return r;
+
+ return imgu_fmt(imgu, node - imgu->nodes, f, true);
+}
+
+static int ipu3_vidioc_s_fmt(struct file *file, void *fh, struct v4l2_format
*f)
+{
+ struct imgu_device *imgu = video_drvdata(file);
+ struct imgu_video_device *node = file_to_intel_ipu3_node(file);
+ int r;
+
+ r = ipu3_try_fmt(file, fh, f);
+ if (r)
+ return r;
+
+ return imgu_fmt(imgu, node - imgu->nodes, f, false);
+}
+
+static int ipu3_meta_enum_format(struct file *file, void *fh,
+ struct v4l2_fmtdesc *f)
+{
+ struct imgu_video_device *node = file_to_intel_ipu3_node(file);
+
+ /* Each node is dedicated to only one meta format */
+ if (f->index > 0 || f->type != node->vbq.type)
+ return -EINVAL;
+
+ f->pixelformat = node->vdev_fmt.fmt.meta.dataformat;
+
+ return 0;
+}
+
+static int ipu3_vidioc_g_meta_fmt(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct imgu_video_device *node = file_to_intel_ipu3_node(file);
+
+ if (f->type != node->vbq.type)
+ return -EINVAL;
+
+ f->fmt = node->vdev_fmt.fmt;
+
+ return 0;
+}
+
+static int ipu3_vidioc_enum_input(struct file *file, void *fh,
+ struct v4l2_input *input)
+{
+ if (input->index > 0)
+ return -EINVAL;
+ strscpy(input->name, "camera", sizeof(input->name));
+ input->type = V4L2_INPUT_TYPE_CAMERA;
+
+ return 0;
+}
+
+static int ipu3_vidioc_g_input(struct file *file, void *fh, unsigned int
*input)
+{
+ *input = 0;
+
+ return 0;
+}
+
+static int ipu3_vidioc_s_input(struct file *file, void *fh, unsigned int input)
+{
+ return input == 0 ? 0 : -EINVAL;
+}
+
+static int ipu3_vidioc_enum_output(struct file *file, void *fh,
+ struct v4l2_output *output)
+{
+ if (output->index > 0)
+ return -EINVAL;
+ strscpy(output->name, "camera", sizeof(output->name));
+ output->type = V4L2_INPUT_TYPE_CAMERA;
+
+ return 0;
+}
+
+static int ipu3_vidioc_g_output(struct file *file, void *fh,
+ unsigned int *output)
+{
+ *output = 0;
+
+ return 0;
+}
+
+static int ipu3_vidioc_s_output(struct file *file, void *fh,
+ unsigned int output)
+{
+ return output == 0 ? 0 : -EINVAL;
+}
+
+/******************** function pointers ********************/
+
+static struct v4l2_subdev_internal_ops ipu3_subdev_internal_ops = {
+ .open = ipu3_subdev_open,
+};
+
+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,
+ .get_selection = ipu3_subdev_get_selection,
+ .set_selection = ipu3_subdev_set_selection,
+};
+
+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_init = ipu3_vb2_buf_init,
+ .buf_cleanup = ipu3_vb2_buf_cleanup,
+ .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_vidioc_querycap,
+
+ .vidioc_enum_fmt_vid_cap_mplane = vidioc_enum_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap_mplane = ipu3_vidioc_g_fmt,
+ .vidioc_s_fmt_vid_cap_mplane = ipu3_vidioc_s_fmt,
+ .vidioc_try_fmt_vid_cap_mplane = ipu3_vidioc_try_fmt,
+
+ .vidioc_enum_fmt_vid_out_mplane = vidioc_enum_fmt_vid_out,
+ .vidioc_g_fmt_vid_out_mplane = ipu3_vidioc_g_fmt,
+ .vidioc_s_fmt_vid_out_mplane = ipu3_vidioc_s_fmt,
+ .vidioc_try_fmt_vid_out_mplane = ipu3_vidioc_try_fmt,
+
+ .vidioc_enum_output = ipu3_vidioc_enum_output,
+ .vidioc_g_output = ipu3_vidioc_g_output,
+ .vidioc_s_output = ipu3_vidioc_s_output,
+
+ .vidioc_enum_input = ipu3_vidioc_enum_input,
+ .vidioc_g_input = ipu3_vidioc_g_input,
+ .vidioc_s_input = ipu3_vidioc_s_input,
+
+ /* 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,
+};
+
+static const struct v4l2_ioctl_ops ipu3_v4l2_meta_ioctl_ops = {
+ .vidioc_querycap = ipu3_vidioc_querycap,
+
+ /* meta capture */
+ .vidioc_enum_fmt_meta_cap = ipu3_meta_enum_format,
+ .vidioc_g_fmt_meta_cap = ipu3_vidioc_g_meta_fmt,
+ .vidioc_s_fmt_meta_cap = ipu3_vidioc_g_meta_fmt,
+ .vidioc_try_fmt_meta_cap = ipu3_vidioc_g_meta_fmt,
+
+ /* meta output */
+ .vidioc_enum_fmt_meta_out = ipu3_meta_enum_format,
+ .vidioc_g_fmt_meta_out = ipu3_vidioc_g_meta_fmt,
+ .vidioc_s_fmt_meta_out = ipu3_vidioc_g_meta_fmt,
+ .vidioc_try_fmt_meta_out = ipu3_vidioc_g_meta_fmt,
+
+ .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 ********************/
+
+/* helper function to config node's video properties */
+static void ipu3_node_to_v4l2(u32 node, struct video_device *vdev,
+ struct v4l2_format *f)
+{
+ u32 cap;
+
+ /* Should not happen */
+ WARN_ON(node >= IMGU_NODE_NUM);
+
+ switch (node) {
+ case IMGU_NODE_IN:
+ cap = V4L2_CAP_VIDEO_OUTPUT_MPLANE;
+ f->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
+ vdev->ioctl_ops = &ipu3_v4l2_ioctl_ops;
+ break;
+ case IMGU_NODE_PARAMS:
+ cap = V4L2_CAP_META_OUTPUT;
+ f->type = V4L2_BUF_TYPE_META_OUTPUT;
+ f->fmt.meta.dataformat = V4L2_META_FMT_IPU3_PARAMS;
+ vdev->ioctl_ops = &ipu3_v4l2_meta_ioctl_ops;
+ ipu3_css_meta_fmt_set(&f->fmt.meta);
+ break;
+ case IMGU_NODE_STAT_3A:
+ cap = V4L2_CAP_META_CAPTURE;
+ f->type = V4L2_BUF_TYPE_META_CAPTURE;
+ f->fmt.meta.dataformat = V4L2_META_FMT_IPU3_STAT_3A;
+ vdev->ioctl_ops = &ipu3_v4l2_meta_ioctl_ops;
+ ipu3_css_meta_fmt_set(&f->fmt.meta);
+ break;
+ default:
+ cap = V4L2_CAP_VIDEO_CAPTURE_MPLANE;
+ f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+ vdev->ioctl_ops = &ipu3_v4l2_ioctl_ops;
+ }
+
+ vdev->device_caps = V4L2_CAP_STREAMING | cap;
+}
+
+int imgu_v4l2_register(struct imgu_device *imgu)
+{
+ struct v4l2_mbus_framefmt def_bus_fmt = { 0 };
+ struct v4l2_pix_format_mplane def_pix_fmt = { 0 };
+
+ int i, r;
+
+ /* Initialize miscellaneous variables */
+ imgu->streaming = false;
+
+ /* Init media device */
+ media_device_pci_init(&imgu->media_dev, imgu->pci_dev, IMGU_NAME);
+
+ /* Set up v4l2 device */
+ imgu->v4l2_dev.mdev = &imgu->media_dev;
+ imgu->v4l2_dev.ctrl_handler = imgu->ctrl_handler;
+ r = v4l2_device_register(&imgu->pci_dev->dev, &imgu->v4l2_dev);
+ if (r) {
+ dev_err(&imgu->pci_dev->dev,
+ "failed to register V4L2 device (%d)\n", r);
+ goto fail_v4l2_dev;
+ }
+
+ /* Initialize subdev media entity */
+ r = media_entity_pads_init(&imgu->subdev.entity, IMGU_NODE_NUM,
+ imgu->subdev_pads);
+ if (r) {
+ dev_err(&imgu->pci_dev->dev,
+ "failed initialize subdev media entity (%d)\n", r);
+ goto fail_subdev_pads;
+ }
+ imgu->subdev.entity.ops = &ipu3_media_ops;
+ for (i = 0; i < IMGU_NODE_NUM; i++) {
+ imgu->subdev_pads[i].flags = imgu->nodes[i].output ?
+ MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
+ }
+
+ /* Initialize subdev */
+ v4l2_subdev_init(&imgu->subdev, &ipu3_subdev_ops);
+ imgu->subdev.entity.function = MEDIA_ENT_F_PROC_VIDEO_STATISTICS;
+ imgu->subdev.internal_ops = &ipu3_subdev_internal_ops;
+ imgu->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
+ strscpy(imgu->subdev.name, IMGU_NAME, sizeof(imgu->subdev.name));
+ v4l2_set_subdevdata(&imgu->subdev, imgu);
+ imgu->subdev.ctrl_handler = imgu->ctrl_handler;
+ r = v4l2_device_register_subdev(&imgu->v4l2_dev, &imgu->subdev);
+ if (r) {
+ dev_err(&imgu->pci_dev->dev,
+ "failed initialize subdev (%d)\n", r);
+ goto fail_subdev;
+ }
+ r = v4l2_device_register_subdev_nodes(&imgu->v4l2_dev);
+ if (r) {
+ dev_err(&imgu->pci_dev->dev,
+ "failed to register subdevs (%d)\n", r);
+ goto fail_subdevs;
+ }
+
+ /* Initialize formats to default values */
+ def_bus_fmt.width = 1920;
+ def_bus_fmt.height = 1080;
+ def_bus_fmt.code = MEDIA_BUS_FMT_FIXED;
+ def_bus_fmt.field = V4L2_FIELD_NONE;
+ def_bus_fmt.colorspace = V4L2_COLORSPACE_RAW;
+ def_bus_fmt.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+ def_bus_fmt.quantization = V4L2_QUANTIZATION_DEFAULT;
+ def_bus_fmt.xfer_func = V4L2_XFER_FUNC_DEFAULT;
+
+ def_pix_fmt.width = def_bus_fmt.width;
+ def_pix_fmt.height = def_bus_fmt.height;
+ def_pix_fmt.field = def_bus_fmt.field;
+ def_pix_fmt.num_planes = 1;
+ def_pix_fmt.plane_fmt[0].bytesperline = def_pix_fmt.width * 2;
+ def_pix_fmt.plane_fmt[0].sizeimage =
+ def_pix_fmt.height * def_pix_fmt.plane_fmt[0].bytesperline;
+ def_pix_fmt.flags = 0;
+ def_pix_fmt.colorspace = def_bus_fmt.colorspace;
+ def_pix_fmt.ycbcr_enc = def_bus_fmt.ycbcr_enc;
+ def_pix_fmt.quantization = def_bus_fmt.quantization;
+ def_pix_fmt.xfer_func = def_bus_fmt.xfer_func;
+
+ /* Create video nodes and links */
+ for (i = 0; i < IMGU_NODE_NUM; i++) {
+ struct imgu_video_device *node = &imgu->nodes[i];
+ struct video_device *vdev = &node->vdev;
+ struct vb2_queue *vbq = &node->vbq;
+ u32 flags;
+
+ /* Initialize miscellaneous variables */
+ mutex_init(&node->lock);
+ INIT_LIST_HEAD(&node->buffers);
+
+ /* Initialize formats to default values */
+ node->pad_fmt = def_bus_fmt;
+ ipu3_node_to_v4l2(i, vdev, &node->vdev_fmt);
+ if (node->vdev_fmt.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE ||
+ node->vdev_fmt.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
+ def_pix_fmt.pixelformat = node->output ?
+ V4L2_PIX_FMT_IPU3_SGRBG10 :
+ V4L2_PIX_FMT_NV12;
+ node->vdev_fmt.fmt.pix_mp = def_pix_fmt;
+ }
+ /* Initialize media entities */
+ r = media_entity_pads_init(&vdev->entity, 1, &node->vdev_pad);
+ if (r) {
+ dev_err(&imgu->pci_dev->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->vdev_fmt.type;
+ vbq->io_modes = VB2_USERPTR | VB2_MMAP | VB2_DMABUF;
+ vbq->ops = &ipu3_vb2_ops;
+ vbq->mem_ops = &vb2_dma_sg_memops;
+ if (imgu->buf_struct_size <= 0)
+ imgu->buf_struct_size = sizeof(struct ipu3_vb2_buffer);
+ vbq->buf_struct_size = imgu->buf_struct_size;
+ vbq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ vbq->min_buffers_needed = 0; /* Can streamon w/o buffers */
+ vbq->drv_priv = imgu;
+ vbq->lock = &node->lock;
+ r = vb2_queue_init(vbq);
+ if (r) {
+ dev_err(&imgu->pci_dev->dev,
+ "failed to initialize video queue (%d)\n", r);
+ goto fail_vdev;
+ }
+
+ /* Initialize vdev */
+ snprintf(vdev->name, sizeof(vdev->name), "%s %s",
+ IMGU_NAME, node->name);
+ vdev->release = video_device_release_empty;
+ vdev->fops = &ipu3_v4l2_fops;
+ vdev->lock = &node->lock;
+ vdev->v4l2_dev = &imgu->v4l2_dev;
+ vdev->queue = &node->vbq;
+ vdev->vfl_dir = node->output ? VFL_DIR_TX : VFL_DIR_RX;
+ video_set_drvdata(vdev, imgu);
+ r = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
+ if (r) {
+ dev_err(&imgu->pci_dev->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,
+ &imgu->subdev.entity,
+ i, flags);
+ } else {
+ r = media_create_pad_link(&imgu->subdev.entity,
+ i, &vdev->entity, 0, flags);
+ }
+ if (r)
+ goto fail_link;
+ }
+
+ r = media_device_register(&imgu->media_dev);
+ if (r) {
+ dev_err(&imgu->pci_dev->dev,
+ "failed to register media device (%d)\n", r);
+ i--;
+ goto fail_link;
+ }
+
+ return 0;
+
+ for (; i >= 0; i--) {
+fail_link:
+ video_unregister_device(&imgu->nodes[i].vdev);
+fail_vdev:
+ media_entity_cleanup(&imgu->nodes[i].vdev.entity);
+fail_vdev_media_entity:
+ mutex_destroy(&imgu->nodes[i].lock);
+ }
+fail_subdevs:
+ v4l2_device_unregister_subdev(&imgu->subdev);
+fail_subdev:
+ media_entity_cleanup(&imgu->subdev.entity);
+fail_subdev_pads:
+ v4l2_device_unregister(&imgu->v4l2_dev);
+fail_v4l2_dev:
+ media_device_cleanup(&imgu->media_dev);
+
+ return r;
+}
+
+int imgu_v4l2_unregister(struct imgu_device *imgu)
+{
+ unsigned int i;
+
+ media_device_unregister(&imgu->media_dev);
+ media_device_cleanup(&imgu->media_dev);
+
+ for (i = 0; i < IMGU_NODE_NUM; i++) {
+ video_unregister_device(&imgu->nodes[i].vdev);
+ media_entity_cleanup(&imgu->nodes[i].vdev.entity);
+ mutex_destroy(&imgu->nodes[i].lock);
+ }
+
+ v4l2_device_unregister_subdev(&imgu->subdev);
+ media_entity_cleanup(&imgu->subdev.entity);
+ v4l2_device_unregister(&imgu->v4l2_dev);
+
+ return 0;
+}
+
+void imgu_v4l2_buffer_done(struct vb2_buffer *vb,
+ enum vb2_buffer_state state)
+{
+ struct ipu3_vb2_buffer *b =
+ container_of(vb, struct ipu3_vb2_buffer, vbb.vb2_buf);
+
+ list_del(&b->list);
+ vb2_buffer_done(&b->vbb.vb2_buf, state);
+}
--
2.7.4
