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