Em Thu, 13 Dec 2018 11:50:58 +0200
Sakari Ailus <sakari.ai...@linux.intel.com> escreveu:
> From: Yong Zhi <yong....@intel.com>
>
> 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>
> Signed-off-by: Sakari Ailus <sakari.ai...@linux.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 0000000000000..038ee749cb75c
> --- /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);
> + }
Please don't do that! a goto to something inside a loop is very
weird...
I'm not even sure if C spec allows that (or if it would do what
you think it does). Instead, do something like:
fail:
for(...) {
...
}
and ensure that this would do the right thing - either by adding
some checks inside the loop or by doing some undo logic before
calling goto. E. g. something like:
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);
video_unregister_device(&imgu->nodes[i].vdev);
media_entity_cleanup(&imgu->nodes[i].vdev.entity);
goto fail;
}
...
fail:
for (i--; i >= 0; i--) {
video_unregister_device(&imgu->nodes[i].vdev);
media_entity_cleanup(&imgu->nodes[i].vdev.entity);
mutex_destroy(&imgu->nodes[i].lock);
}
As the driver is merged for staging, I'll apply it (as we can accept
bad code there), but please send a fix for it as soon as possible.
> +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);
> +}
Thanks,
Mauro
