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// SPDX-License-Identifier: GPL-2.0-only
/*
* vivid-meta-cap.c - meta capture support functions.
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <linux/usb/video.h>
#include "vivid-core.h"
#include "vivid-kthread-cap.h"
#include "vivid-meta-cap.h"
static int meta_cap_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
unsigned int *nplanes, unsigned int sizes[],
struct device *alloc_devs[])
{
struct vivid_dev *dev = vb2_get_drv_priv(vq);
unsigned int size = sizeof(struct vivid_uvc_meta_buf);
if (!vivid_is_webcam(dev))
return -EINVAL;
if (*nplanes) {
if (sizes[0] < size)
return -EINVAL;
} else {
sizes[0] = size;
}
if (vq->num_buffers + *nbuffers < 2)
*nbuffers = 2 - vq->num_buffers;
*nplanes = 1;
return 0;
}
static int meta_cap_buf_prepare(struct vb2_buffer *vb)
{
struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
unsigned int size = sizeof(struct vivid_uvc_meta_buf);
dprintk(dev, 1, "%s\n", __func__);
if (dev->buf_prepare_error) {
/*
* Error injection: test what happens if buf_prepare() returns
* an error.
*/
dev->buf_prepare_error = false;
return -EINVAL;
}
if (vb2_plane_size(vb, 0) < size) {
dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
__func__, vb2_plane_size(vb, 0), size);
return -EINVAL;
}
vb2_set_plane_payload(vb, 0, size);
return 0;
}
static void meta_cap_buf_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);
dprintk(dev, 1, "%s\n", __func__);
spin_lock(&dev->slock);
list_add_tail(&buf->list, &dev->meta_cap_active);
spin_unlock(&dev->slock);
}
static int meta_cap_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct vivid_dev *dev = vb2_get_drv_priv(vq);
int err;
dprintk(dev, 1, "%s\n", __func__);
dev->meta_cap_seq_count = 0;
if (dev->start_streaming_error) {
dev->start_streaming_error = false;
err = -EINVAL;
} else {
err = vivid_start_generating_vid_cap(dev,
&dev->meta_cap_streaming);
}
if (err) {
struct vivid_buffer *buf, *tmp;
list_for_each_entry_safe(buf, tmp,
&dev->meta_cap_active, list) {
list_del(&buf->list);
vb2_buffer_done(&buf->vb.vb2_buf,
VB2_BUF_STATE_QUEUED);
}
}
return err;
}
/* abort streaming and wait for last buffer */
static void meta_cap_stop_streaming(struct vb2_queue *vq)
{
struct vivid_dev *dev = vb2_get_drv_priv(vq);
dprintk(dev, 1, "%s\n", __func__);
vivid_stop_generating_vid_cap(dev, &dev->meta_cap_streaming);
}
static void meta_cap_buf_request_complete(struct vb2_buffer *vb)
{
struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
v4l2_ctrl_request_complete(vb->req_obj.req, &dev->ctrl_hdl_meta_cap);
}
const struct vb2_ops vivid_meta_cap_qops = {
.queue_setup = meta_cap_queue_setup,
.buf_prepare = meta_cap_buf_prepare,
.buf_queue = meta_cap_buf_queue,
.start_streaming = meta_cap_start_streaming,
.stop_streaming = meta_cap_stop_streaming,
.buf_request_complete = meta_cap_buf_request_complete,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
int vidioc_enum_fmt_meta_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
struct vivid_dev *dev = video_drvdata(file);
if (!vivid_is_webcam(dev))
return -EINVAL;
if (f->index > 0)
return -EINVAL;
f->type = V4L2_BUF_TYPE_META_CAPTURE;
f->pixelformat = V4L2_META_FMT_UVC;
return 0;
}
int vidioc_g_fmt_meta_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct vivid_dev *dev = video_drvdata(file);
struct v4l2_meta_format *meta = &f->fmt.meta;
if (!vivid_is_webcam(dev) || !dev->has_meta_cap)
return -EINVAL;
meta->dataformat = V4L2_META_FMT_UVC;
meta->buffersize = sizeof(struct vivid_uvc_meta_buf);
return 0;
}
void vivid_meta_cap_fillbuff(struct vivid_dev *dev,
struct vivid_buffer *buf, u64 soe)
{
struct vivid_uvc_meta_buf *meta = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
int buf_off = 0;
buf->vb.sequence = dev->meta_cap_seq_count;
if (dev->field_cap == V4L2_FIELD_ALTERNATE)
buf->vb.sequence /= 2;
memset(meta, 1, vb2_plane_size(&buf->vb.vb2_buf, 0));
meta->ns = ktime_get_ns();
meta->sof = buf->vb.sequence * 30;
meta->length = sizeof(*meta) - offsetof(struct vivid_uvc_meta_buf, length);
meta->flags = UVC_STREAM_EOH | UVC_STREAM_EOF;
if ((buf->vb.sequence % 2) == 0)
meta->flags |= UVC_STREAM_FID;
dprintk(dev, 2, "%s ns:%llu sof:%4d len:%u flags: 0x%02x",
__func__, meta->ns, meta->sof, meta->length, meta->flags);
if (dev->meta_pts) {
meta->flags |= UVC_STREAM_PTS;
meta->buf[0] = div_u64(soe, VIVID_META_CLOCK_UNIT);
buf_off = 4;
dprintk(dev, 2, " pts: %u\n", *(__u32 *)(meta->buf));
}
if (dev->meta_scr) {
meta->flags |= UVC_STREAM_SCR;
meta->buf[buf_off] = div_u64((soe + dev->cap_frame_eof_offset),
VIVID_META_CLOCK_UNIT);
meta->buf[buf_off + 4] = (buf->vb.sequence * 30) % 1000;
dprintk(dev, 2, " stc: %u, sof counter: %u\n",
*(__u32 *)(meta->buf + buf_off),
*(__u16 *)(meta->buf + buf_off + 4));
}
dprintk(dev, 2, "\n");
}
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