// SPDX-License-Identifier: GPL-2.0+
|
/*
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* vsp1_histo.c -- R-Car VSP1 Histogram API
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*
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* Copyright (C) 2016 Renesas Electronics Corporation
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* Copyright (C) 2016 Laurent Pinchart
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*/
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|
#include <linux/device.h>
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#include <linux/gfp.h>
|
|
#include <media/v4l2-ioctl.h>
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#include <media/v4l2-subdev.h>
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#include <media/videobuf2-vmalloc.h>
|
|
#include "vsp1.h"
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#include "vsp1_histo.h"
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#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;
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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);
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struct vsp1_histogram_buffer *buf = to_vsp1_histogram_buffer(vbuf);
|
|
if (vb->num_planes != 1)
|
return -EINVAL;
|
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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);
|
}
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|
static int histo_start_streaming(struct vb2_queue *vq, unsigned int count)
|
{
|
return 0;
|
}
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|
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);
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sel->r.top = clamp_t(unsigned int, sel->r.top, 0, format->height - 1);
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sel->r.width = clamp_t(unsigned int, sel->r.width, HISTO_MIN_SIZE,
|
format->width - sel->r.left);
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sel->r.height = clamp_t(unsigned int, sel->r.height, HISTO_MIN_SIZE,
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format->height - sel->r.top);
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/* Set the crop rectangle and reset the compose rectangle. */
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selection = vsp1_entity_get_pad_selection(&histo->entity, config,
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sel->pad, V4L2_SEL_TGT_CROP);
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*selection = sel->r;
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|
selection = vsp1_entity_get_pad_selection(&histo->entity, config,
|
sel->pad,
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V4L2_SEL_TGT_COMPOSE);
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*selection = sel->r;
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|
return 0;
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}
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static int histo_set_compose(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *config,
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struct v4l2_subdev_selection *sel)
|
{
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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;
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sel->r.top = 0;
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|
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;
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|
|
sel->r.height = clamp(sel->r.height, crop->height / 4, crop->height);
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ratio = 1 << (crop->height * 2 / sel->r.height / 3);
|
sel->r.height = crop->height / ratio;
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compose = vsp1_entity_get_pad_selection(&histo->entity, config,
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sel->pad,
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V4L2_SEL_TGT_COMPOSE);
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*compose = sel->r;
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|
return 0;
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}
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static int histo_set_selection(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
|
struct v4l2_subdev_selection *sel)
|
{
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struct vsp1_histogram *histo = subdev_to_histo(subdev);
|
struct v4l2_subdev_pad_config *config;
|
int ret;
|
|
if (sel->pad != HISTO_PAD_SINK)
|
return -EINVAL;
|
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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;
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fmt->format.width = 0;
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fmt->format.height = 0;
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fmt->format.field = V4L2_FIELD_NONE;
|
fmt->format.colorspace = V4L2_COLORSPACE_RAW;
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return 0;
|
}
|
|
return vsp1_subdev_get_pad_format(subdev, cfg, fmt);
|
}
|
|
static int histo_set_format(struct v4l2_subdev *subdev,
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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 = {
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.enum_mbus_code = histo_enum_mbus_code,
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.enum_frame_size = histo_enum_frame_size,
|
.get_fmt = histo_get_format,
|
.set_fmt = histo_set_format,
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.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_VIDEO;
|
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_VIDEO, -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;
|
}
|
