| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * vsp1_histo.c -- R-Car VSP1 Histogram API |
| * |
| * Copyright (C) 2016 Renesas Electronics Corporation |
| * Copyright (C) 2016 Laurent Pinchart |
| * |
| * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) |
| */ |
| |
| #include <linux/device.h> |
| #include <linux/gfp.h> |
| |
| #include <media/v4l2-ioctl.h> |
| #include <media/v4l2-subdev.h> |
| #include <media/videobuf2-vmalloc.h> |
| |
| #include "vsp1.h" |
| #include "vsp1_histo.h" |
| #include "vsp1_pipe.h" |
| |
| #define HISTO_MIN_SIZE 4U |
| #define HISTO_MAX_SIZE 8192U |
| |
| /* ----------------------------------------------------------------------------- |
| * Buffer Operations |
| */ |
| |
| static inline struct vsp1_histogram_buffer * |
| to_vsp1_histogram_buffer(struct vb2_v4l2_buffer *vbuf) |
| { |
| return container_of(vbuf, struct vsp1_histogram_buffer, buf); |
| } |
| |
| struct vsp1_histogram_buffer * |
| vsp1_histogram_buffer_get(struct vsp1_histogram *histo) |
| { |
| struct vsp1_histogram_buffer *buf = NULL; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&histo->irqlock, flags); |
| |
| if (list_empty(&histo->irqqueue)) |
| goto done; |
| |
| buf = list_first_entry(&histo->irqqueue, struct vsp1_histogram_buffer, |
| queue); |
| list_del(&buf->queue); |
| histo->readout = true; |
| |
| done: |
| spin_unlock_irqrestore(&histo->irqlock, flags); |
| return buf; |
| } |
| |
| void vsp1_histogram_buffer_complete(struct vsp1_histogram *histo, |
| struct vsp1_histogram_buffer *buf, |
| size_t size) |
| { |
| struct vsp1_pipeline *pipe = histo->entity.pipe; |
| unsigned long flags; |
| |
| /* |
| * The pipeline pointer is guaranteed to be valid as this function is |
| * called from the frame completion interrupt handler, which can only |
| * occur when video streaming is active. |
| */ |
| buf->buf.sequence = pipe->sequence; |
| buf->buf.vb2_buf.timestamp = ktime_get_ns(); |
| vb2_set_plane_payload(&buf->buf.vb2_buf, 0, size); |
| vb2_buffer_done(&buf->buf.vb2_buf, VB2_BUF_STATE_DONE); |
| |
| spin_lock_irqsave(&histo->irqlock, flags); |
| histo->readout = false; |
| wake_up(&histo->wait_queue); |
| spin_unlock_irqrestore(&histo->irqlock, flags); |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * videobuf2 Queue Operations |
| */ |
| |
| static int histo_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, |
| unsigned int *nplanes, unsigned int sizes[], |
| struct device *alloc_devs[]) |
| { |
| struct vsp1_histogram *histo = vb2_get_drv_priv(vq); |
| |
| if (*nplanes) { |
| if (*nplanes != 1) |
| return -EINVAL; |
| |
| if (sizes[0] < histo->data_size) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| *nplanes = 1; |
| sizes[0] = histo->data_size; |
| |
| return 0; |
| } |
| |
| static int histo_buffer_prepare(struct vb2_buffer *vb) |
| { |
| struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
| struct vsp1_histogram *histo = vb2_get_drv_priv(vb->vb2_queue); |
| struct vsp1_histogram_buffer *buf = to_vsp1_histogram_buffer(vbuf); |
| |
| if (vb->num_planes != 1) |
| return -EINVAL; |
| |
| if (vb2_plane_size(vb, 0) < histo->data_size) |
| return -EINVAL; |
| |
| buf->addr = vb2_plane_vaddr(vb, 0); |
| |
| return 0; |
| } |
| |
| static void histo_buffer_queue(struct vb2_buffer *vb) |
| { |
| struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
| struct vsp1_histogram *histo = vb2_get_drv_priv(vb->vb2_queue); |
| struct vsp1_histogram_buffer *buf = to_vsp1_histogram_buffer(vbuf); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&histo->irqlock, flags); |
| list_add_tail(&buf->queue, &histo->irqqueue); |
| spin_unlock_irqrestore(&histo->irqlock, flags); |
| } |
| |
| static int histo_start_streaming(struct vb2_queue *vq, unsigned int count) |
| { |
| return 0; |
| } |
| |
| static void histo_stop_streaming(struct vb2_queue *vq) |
| { |
| struct vsp1_histogram *histo = vb2_get_drv_priv(vq); |
| struct vsp1_histogram_buffer *buffer; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&histo->irqlock, flags); |
| |
| /* Remove all buffers from the IRQ queue. */ |
| list_for_each_entry(buffer, &histo->irqqueue, queue) |
| vb2_buffer_done(&buffer->buf.vb2_buf, VB2_BUF_STATE_ERROR); |
| INIT_LIST_HEAD(&histo->irqqueue); |
| |
| /* Wait for the buffer being read out (if any) to complete. */ |
| wait_event_lock_irq(histo->wait_queue, !histo->readout, histo->irqlock); |
| |
| spin_unlock_irqrestore(&histo->irqlock, flags); |
| } |
| |
| static const struct vb2_ops histo_video_queue_qops = { |
| .queue_setup = histo_queue_setup, |
| .buf_prepare = histo_buffer_prepare, |
| .buf_queue = histo_buffer_queue, |
| .wait_prepare = vb2_ops_wait_prepare, |
| .wait_finish = vb2_ops_wait_finish, |
| .start_streaming = histo_start_streaming, |
| .stop_streaming = histo_stop_streaming, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * V4L2 Subdevice Operations |
| */ |
| |
| static int histo_enum_mbus_code(struct v4l2_subdev *subdev, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_mbus_code_enum *code) |
| { |
| struct vsp1_histogram *histo = subdev_to_histo(subdev); |
| |
| if (code->pad == HISTO_PAD_SOURCE) { |
| code->code = MEDIA_BUS_FMT_FIXED; |
| return 0; |
| } |
| |
| return vsp1_subdev_enum_mbus_code(subdev, cfg, code, histo->formats, |
| histo->num_formats); |
| } |
| |
| static int histo_enum_frame_size(struct v4l2_subdev *subdev, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_frame_size_enum *fse) |
| { |
| if (fse->pad != HISTO_PAD_SINK) |
| return -EINVAL; |
| |
| return vsp1_subdev_enum_frame_size(subdev, cfg, fse, HISTO_MIN_SIZE, |
| HISTO_MIN_SIZE, HISTO_MAX_SIZE, |
| HISTO_MAX_SIZE); |
| } |
| |
| static int histo_get_selection(struct v4l2_subdev *subdev, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_selection *sel) |
| { |
| struct vsp1_histogram *histo = subdev_to_histo(subdev); |
| struct v4l2_subdev_pad_config *config; |
| struct v4l2_mbus_framefmt *format; |
| struct v4l2_rect *crop; |
| int ret = 0; |
| |
| if (sel->pad != HISTO_PAD_SINK) |
| return -EINVAL; |
| |
| mutex_lock(&histo->entity.lock); |
| |
| config = vsp1_entity_get_pad_config(&histo->entity, cfg, sel->which); |
| if (!config) { |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| switch (sel->target) { |
| case V4L2_SEL_TGT_COMPOSE_BOUNDS: |
| case V4L2_SEL_TGT_COMPOSE_DEFAULT: |
| crop = vsp1_entity_get_pad_selection(&histo->entity, config, |
| HISTO_PAD_SINK, |
| V4L2_SEL_TGT_CROP); |
| sel->r.left = 0; |
| sel->r.top = 0; |
| sel->r.width = crop->width; |
| sel->r.height = crop->height; |
| break; |
| |
| case V4L2_SEL_TGT_CROP_BOUNDS: |
| case V4L2_SEL_TGT_CROP_DEFAULT: |
| format = vsp1_entity_get_pad_format(&histo->entity, config, |
| HISTO_PAD_SINK); |
| sel->r.left = 0; |
| sel->r.top = 0; |
| sel->r.width = format->width; |
| sel->r.height = format->height; |
| break; |
| |
| case V4L2_SEL_TGT_COMPOSE: |
| case V4L2_SEL_TGT_CROP: |
| sel->r = *vsp1_entity_get_pad_selection(&histo->entity, config, |
| sel->pad, sel->target); |
| break; |
| |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| |
| done: |
| mutex_unlock(&histo->entity.lock); |
| return ret; |
| } |
| |
| static int histo_set_crop(struct v4l2_subdev *subdev, |
| struct v4l2_subdev_pad_config *config, |
| struct v4l2_subdev_selection *sel) |
| { |
| struct vsp1_histogram *histo = subdev_to_histo(subdev); |
| struct v4l2_mbus_framefmt *format; |
| struct v4l2_rect *selection; |
| |
| /* The crop rectangle must be inside the input frame. */ |
| format = vsp1_entity_get_pad_format(&histo->entity, config, |
| HISTO_PAD_SINK); |
| sel->r.left = clamp_t(unsigned int, sel->r.left, 0, format->width - 1); |
| sel->r.top = clamp_t(unsigned int, sel->r.top, 0, format->height - 1); |
| sel->r.width = clamp_t(unsigned int, sel->r.width, HISTO_MIN_SIZE, |
| format->width - sel->r.left); |
| sel->r.height = clamp_t(unsigned int, sel->r.height, HISTO_MIN_SIZE, |
| format->height - sel->r.top); |
| |
| /* Set the crop rectangle and reset the compose rectangle. */ |
| selection = vsp1_entity_get_pad_selection(&histo->entity, config, |
| sel->pad, V4L2_SEL_TGT_CROP); |
| *selection = sel->r; |
| |
| selection = vsp1_entity_get_pad_selection(&histo->entity, config, |
| sel->pad, |
| V4L2_SEL_TGT_COMPOSE); |
| *selection = sel->r; |
| |
| return 0; |
| } |
| |
| static int histo_set_compose(struct v4l2_subdev *subdev, |
| struct v4l2_subdev_pad_config *config, |
| struct v4l2_subdev_selection *sel) |
| { |
| struct vsp1_histogram *histo = subdev_to_histo(subdev); |
| struct v4l2_rect *compose; |
| struct v4l2_rect *crop; |
| unsigned int ratio; |
| |
| /* |
| * The compose rectangle is used to configure downscaling, the top left |
| * corner is fixed to (0,0) and the size to 1/2 or 1/4 of the crop |
| * rectangle. |
| */ |
| sel->r.left = 0; |
| sel->r.top = 0; |
| |
| crop = vsp1_entity_get_pad_selection(&histo->entity, config, sel->pad, |
| V4L2_SEL_TGT_CROP); |
| |
| /* |
| * Clamp the width and height to acceptable values first and then |
| * compute the closest rounded dividing ratio. |
| * |
| * Ratio Rounded ratio |
| * -------------------------- |
| * [1.0 1.5[ 1 |
| * [1.5 3.0[ 2 |
| * [3.0 4.0] 4 |
| * |
| * The rounded ratio can be computed using |
| * |
| * 1 << (ceil(ratio * 2) / 3) |
| */ |
| sel->r.width = clamp(sel->r.width, crop->width / 4, crop->width); |
| ratio = 1 << (crop->width * 2 / sel->r.width / 3); |
| sel->r.width = crop->width / ratio; |
| |
| |
| sel->r.height = clamp(sel->r.height, crop->height / 4, crop->height); |
| ratio = 1 << (crop->height * 2 / sel->r.height / 3); |
| sel->r.height = crop->height / ratio; |
| |
| compose = vsp1_entity_get_pad_selection(&histo->entity, config, |
| sel->pad, |
| V4L2_SEL_TGT_COMPOSE); |
| *compose = sel->r; |
| |
| return 0; |
| } |
| |
| static int histo_set_selection(struct v4l2_subdev *subdev, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_selection *sel) |
| { |
| struct vsp1_histogram *histo = subdev_to_histo(subdev); |
| struct v4l2_subdev_pad_config *config; |
| int ret; |
| |
| if (sel->pad != HISTO_PAD_SINK) |
| return -EINVAL; |
| |
| mutex_lock(&histo->entity.lock); |
| |
| config = vsp1_entity_get_pad_config(&histo->entity, cfg, sel->which); |
| if (!config) { |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| if (sel->target == V4L2_SEL_TGT_CROP) |
| ret = histo_set_crop(subdev, config, sel); |
| else if (sel->target == V4L2_SEL_TGT_COMPOSE) |
| ret = histo_set_compose(subdev, config, sel); |
| else |
| ret = -EINVAL; |
| |
| done: |
| mutex_unlock(&histo->entity.lock); |
| return ret; |
| } |
| |
| static int histo_get_format(struct v4l2_subdev *subdev, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_format *fmt) |
| { |
| if (fmt->pad == HISTO_PAD_SOURCE) { |
| fmt->format.code = MEDIA_BUS_FMT_FIXED; |
| fmt->format.width = 0; |
| fmt->format.height = 0; |
| fmt->format.field = V4L2_FIELD_NONE; |
| fmt->format.colorspace = V4L2_COLORSPACE_RAW; |
| return 0; |
| } |
| |
| return vsp1_subdev_get_pad_format(subdev, cfg, fmt); |
| } |
| |
| static int histo_set_format(struct v4l2_subdev *subdev, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_format *fmt) |
| { |
| struct vsp1_histogram *histo = subdev_to_histo(subdev); |
| |
| if (fmt->pad != HISTO_PAD_SINK) |
| return histo_get_format(subdev, cfg, fmt); |
| |
| return vsp1_subdev_set_pad_format(subdev, cfg, fmt, |
| histo->formats, histo->num_formats, |
| HISTO_MIN_SIZE, HISTO_MIN_SIZE, |
| HISTO_MAX_SIZE, HISTO_MAX_SIZE); |
| } |
| |
| static const struct v4l2_subdev_pad_ops histo_pad_ops = { |
| .enum_mbus_code = histo_enum_mbus_code, |
| .enum_frame_size = histo_enum_frame_size, |
| .get_fmt = histo_get_format, |
| .set_fmt = histo_set_format, |
| .get_selection = histo_get_selection, |
| .set_selection = histo_set_selection, |
| }; |
| |
| static const struct v4l2_subdev_ops histo_ops = { |
| .pad = &histo_pad_ops, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * V4L2 ioctls |
| */ |
| |
| static int histo_v4l2_querycap(struct file *file, void *fh, |
| struct v4l2_capability *cap) |
| { |
| struct v4l2_fh *vfh = file->private_data; |
| struct vsp1_histogram *histo = vdev_to_histo(vfh->vdev); |
| |
| cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING |
| | V4L2_CAP_VIDEO_CAPTURE_MPLANE |
| | V4L2_CAP_VIDEO_OUTPUT_MPLANE |
| | V4L2_CAP_META_CAPTURE; |
| |
| strscpy(cap->driver, "vsp1", sizeof(cap->driver)); |
| strscpy(cap->card, histo->video.name, sizeof(cap->card)); |
| snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s", |
| dev_name(histo->entity.vsp1->dev)); |
| |
| return 0; |
| } |
| |
| static int histo_v4l2_enum_format(struct file *file, void *fh, |
| struct v4l2_fmtdesc *f) |
| { |
| struct v4l2_fh *vfh = file->private_data; |
| struct vsp1_histogram *histo = vdev_to_histo(vfh->vdev); |
| |
| if (f->index > 0 || f->type != histo->queue.type) |
| return -EINVAL; |
| |
| f->pixelformat = histo->meta_format; |
| |
| return 0; |
| } |
| |
| static int histo_v4l2_get_format(struct file *file, void *fh, |
| struct v4l2_format *format) |
| { |
| struct v4l2_fh *vfh = file->private_data; |
| struct vsp1_histogram *histo = vdev_to_histo(vfh->vdev); |
| struct v4l2_meta_format *meta = &format->fmt.meta; |
| |
| if (format->type != histo->queue.type) |
| return -EINVAL; |
| |
| memset(meta, 0, sizeof(*meta)); |
| |
| meta->dataformat = histo->meta_format; |
| meta->buffersize = histo->data_size; |
| |
| return 0; |
| } |
| |
| static const struct v4l2_ioctl_ops histo_v4l2_ioctl_ops = { |
| .vidioc_querycap = histo_v4l2_querycap, |
| .vidioc_enum_fmt_meta_cap = histo_v4l2_enum_format, |
| .vidioc_g_fmt_meta_cap = histo_v4l2_get_format, |
| .vidioc_s_fmt_meta_cap = histo_v4l2_get_format, |
| .vidioc_try_fmt_meta_cap = histo_v4l2_get_format, |
| .vidioc_reqbufs = vb2_ioctl_reqbufs, |
| .vidioc_querybuf = vb2_ioctl_querybuf, |
| .vidioc_qbuf = vb2_ioctl_qbuf, |
| .vidioc_dqbuf = vb2_ioctl_dqbuf, |
| .vidioc_create_bufs = vb2_ioctl_create_bufs, |
| .vidioc_prepare_buf = vb2_ioctl_prepare_buf, |
| .vidioc_streamon = vb2_ioctl_streamon, |
| .vidioc_streamoff = vb2_ioctl_streamoff, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * V4L2 File Operations |
| */ |
| |
| static const struct v4l2_file_operations histo_v4l2_fops = { |
| .owner = THIS_MODULE, |
| .unlocked_ioctl = video_ioctl2, |
| .open = v4l2_fh_open, |
| .release = vb2_fop_release, |
| .poll = vb2_fop_poll, |
| .mmap = vb2_fop_mmap, |
| }; |
| |
| static void vsp1_histogram_cleanup(struct vsp1_histogram *histo) |
| { |
| if (video_is_registered(&histo->video)) |
| video_unregister_device(&histo->video); |
| |
| media_entity_cleanup(&histo->video.entity); |
| } |
| |
| void vsp1_histogram_destroy(struct vsp1_entity *entity) |
| { |
| struct vsp1_histogram *histo = subdev_to_histo(&entity->subdev); |
| |
| vsp1_histogram_cleanup(histo); |
| } |
| |
| int vsp1_histogram_init(struct vsp1_device *vsp1, struct vsp1_histogram *histo, |
| enum vsp1_entity_type type, const char *name, |
| const struct vsp1_entity_operations *ops, |
| const unsigned int *formats, unsigned int num_formats, |
| size_t data_size, u32 meta_format) |
| { |
| int ret; |
| |
| histo->formats = formats; |
| histo->num_formats = num_formats; |
| histo->data_size = data_size; |
| histo->meta_format = meta_format; |
| |
| histo->pad.flags = MEDIA_PAD_FL_SINK; |
| histo->video.vfl_dir = VFL_DIR_RX; |
| |
| mutex_init(&histo->lock); |
| spin_lock_init(&histo->irqlock); |
| INIT_LIST_HEAD(&histo->irqqueue); |
| init_waitqueue_head(&histo->wait_queue); |
| |
| /* Initialize the VSP entity... */ |
| histo->entity.ops = ops; |
| histo->entity.type = type; |
| |
| ret = vsp1_entity_init(vsp1, &histo->entity, name, 2, &histo_ops, |
| MEDIA_ENT_F_PROC_VIDEO_STATISTICS); |
| if (ret < 0) |
| return ret; |
| |
| /* ... and the media entity... */ |
| ret = media_entity_pads_init(&histo->video.entity, 1, &histo->pad); |
| if (ret < 0) |
| return ret; |
| |
| /* ... and the video node... */ |
| histo->video.v4l2_dev = &vsp1->v4l2_dev; |
| histo->video.fops = &histo_v4l2_fops; |
| snprintf(histo->video.name, sizeof(histo->video.name), |
| "%s histo", histo->entity.subdev.name); |
| histo->video.vfl_type = VFL_TYPE_GRABBER; |
| histo->video.release = video_device_release_empty; |
| histo->video.ioctl_ops = &histo_v4l2_ioctl_ops; |
| histo->video.device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING; |
| |
| video_set_drvdata(&histo->video, histo); |
| |
| /* ... and the buffers queue... */ |
| histo->queue.type = V4L2_BUF_TYPE_META_CAPTURE; |
| histo->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; |
| histo->queue.lock = &histo->lock; |
| histo->queue.drv_priv = histo; |
| histo->queue.buf_struct_size = sizeof(struct vsp1_histogram_buffer); |
| histo->queue.ops = &histo_video_queue_qops; |
| histo->queue.mem_ops = &vb2_vmalloc_memops; |
| histo->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; |
| histo->queue.dev = vsp1->dev; |
| ret = vb2_queue_init(&histo->queue); |
| if (ret < 0) { |
| dev_err(vsp1->dev, "failed to initialize vb2 queue\n"); |
| goto error; |
| } |
| |
| /* ... and register the video device. */ |
| histo->video.queue = &histo->queue; |
| ret = video_register_device(&histo->video, VFL_TYPE_GRABBER, -1); |
| if (ret < 0) { |
| dev_err(vsp1->dev, "failed to register video device\n"); |
| goto error; |
| } |
| |
| return 0; |
| |
| error: |
| vsp1_histogram_cleanup(histo); |
| return ret; |
| } |