--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/* Capture for virtio video device.
+ *
+ * Copyright 2021 OpenSynergy GmbH.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/version.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+
+#include "virtio_video.h"
+
+static int virtio_video_cam_start_streaming(struct vb2_queue *vq,
+ unsigned int count)
+{
+ struct virtio_video_stream *stream = vb2_get_drv_priv(vq);
+
+ if (virtio_video_state(stream) == STREAM_STATE_ERROR)
+ return -EIO;
+
+ if (virtio_video_state(stream) >= STREAM_STATE_INIT)
+ virtio_video_state_update(stream, STREAM_STATE_RUNNING);
+
+ return 0;
+}
+
+static void virtio_video_cam_stop_streaming(struct vb2_queue *vq)
+{
+ struct virtio_video_stream *stream = vb2_get_drv_priv(vq);
+
+ virtio_video_queue_release_buffers(stream,
+ VIRTIO_VIDEO_QUEUE_TYPE_OUTPUT);
+
+ vb2_wait_for_all_buffers(vq);
+}
+
+static const struct vb2_ops virtio_video_cam_qops = {
+ .queue_setup = virtio_video_queue_setup,
+ .buf_init = virtio_video_buf_init,
+ .buf_cleanup = virtio_video_buf_cleanup,
+ .buf_queue = virtio_video_buf_queue,
+ .start_streaming = virtio_video_cam_start_streaming,
+ .stop_streaming = virtio_video_cam_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+static int virtio_video_cam_g_ctrl(struct v4l2_ctrl *ctrl)
+{
+ int ret = 0;
+ struct virtio_video_stream *stream = ctrl2stream(ctrl);
+
+ if (virtio_video_state(stream) == STREAM_STATE_ERROR)
+ return -EIO;
+
+ switch (ctrl->id) {
+ case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
+ if (virtio_video_state(stream) >=
+ STREAM_STATE_DYNAMIC_RES_CHANGE)
+ ctrl->val = stream->out_info.min_buffers;
+ else
+ ctrl->val = 0;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops virtio_video_cam_ctrl_ops = {
+ .g_volatile_ctrl = virtio_video_cam_g_ctrl,
+};
+
+int virtio_video_cam_init_ctrls(struct virtio_video_stream *stream)
+{
+ struct v4l2_ctrl *ctrl;
+
+ v4l2_ctrl_handler_init(&stream->ctrl_handler, 2);
+
+ ctrl = v4l2_ctrl_new_std(&stream->ctrl_handler,
+ &virtio_video_cam_ctrl_ops,
+ V4L2_CID_MIN_BUFFERS_FOR_CAPTURE,
+ MIN_BUFS_MIN, MIN_BUFS_MAX, MIN_BUFS_STEP,
+ MIN_BUFS_DEF);
+
+ if (ctrl)
+ ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
+
+ if (stream->ctrl_handler.error)
+ return stream->ctrl_handler.error;
+
+ v4l2_ctrl_handler_setup(&stream->ctrl_handler);
+
+ return 0;
+}
+
+int virtio_video_cam_init_queues(void *priv, struct vb2_queue *src_vq,
+ struct vb2_queue *dst_vq)
+{
+ struct virtio_video_stream *stream = priv;
+ struct virtio_video_device *vvd = to_virtio_vd(stream->video_dev);
+ struct device *dev = vvd->v4l2_dev.dev;
+ int vq_type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+
+ if (!vvd->is_mplane_cam)
+ vq_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ dst_vq->type = vq_type;
+ dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
+ dst_vq->drv_priv = stream;
+ dst_vq->buf_struct_size = sizeof(struct virtio_video_buffer);
+ dst_vq->ops = &virtio_video_cam_qops;
+ dst_vq->mem_ops = virtio_video_mem_ops(vvd);
+ dst_vq->min_buffers_needed = stream->out_info.min_buffers;
+ dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ dst_vq->lock = &stream->vq_mutex;
+ dst_vq->gfp_flags = virtio_video_gfp_flags(vvd);
+ dst_vq->dev = dev;
+
+ return vb2_queue_init(dst_vq);
+}
+
+int virtio_video_cam_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
+{
+ struct virtio_video_stream *stream = file2stream(file);
+ struct virtio_video_device *vvd = to_virtio_vd(stream->video_dev);
+ struct v4l2_format *fmt_try = f;
+ struct v4l2_format fmt_mp = { 0 };
+ int ret;
+
+ if (!vvd->is_mplane_cam) {
+ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ fmt_mp.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+ fmt_try = &fmt_mp;
+
+ virtio_video_pix_fmt_sp2mp(&f->fmt.pix, &fmt_try->fmt.pix_mp);
+ }
+
+ ret = virtio_video_try_fmt(stream, fmt_try);
+ if (ret)
+ return ret;
+
+ if (!vvd->is_mplane_cam) {
+ if (fmt_try->fmt.pix_mp.num_planes != 1)
+ return -EINVAL;
+
+ virtio_video_pix_fmt_mp2sp(&fmt_try->fmt.pix_mp, &f->fmt.pix);
+ }
+
+ return 0;
+}
+
+static int virtio_video_cam_enum_fmt_vid_cap(struct file *file, void *fh,
+ struct v4l2_fmtdesc *f)
+{
+ struct virtio_video_stream *stream = file2stream(file);
+ struct virtio_video_device *vvd = to_virtio_vd(stream->video_dev);
+ struct video_format *fmt;
+ int idx = 0;
+
+ if (virtio_video_state(stream) == STREAM_STATE_ERROR)
+ return -EIO;
+
+ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
+ f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+ return -EINVAL;
+
+ if (f->index >= vvd->num_output_fmts)
+ return -EINVAL;
+
+ list_for_each_entry(fmt, &vvd->output_fmt_list, formats_list_entry) {
+ if (f->index == idx) {
+ f->pixelformat = fmt->desc.format;
+ return 0;
+ }
+ idx++;
+ }
+ return -EINVAL;
+}
+
+static int virtio_video_cam_g_fmt(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct virtio_video_stream *stream = file2stream(file);
+ struct virtio_video_device *vvd = to_virtio_vd(stream->video_dev);
+ struct v4l2_format fmt_mp = { 0 };
+ struct v4l2_format *fmt_get = f;
+ int ret;
+
+ if (!vvd->is_mplane_cam) {
+ fmt_mp.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+ fmt_get = &fmt_mp;
+ }
+
+ ret = virtio_video_g_fmt(file, fh, fmt_get);
+ if (ret)
+ return ret;
+
+ if (virtio_video_state(stream) == STREAM_STATE_IDLE)
+ virtio_video_state_update(stream, STREAM_STATE_INIT);
+
+ if (!vvd->is_mplane_cam) {
+ if (fmt_get->fmt.pix_mp.num_planes != 1)
+ return -EINVAL;
+
+ virtio_video_pix_fmt_mp2sp(&fmt_get->fmt.pix_mp, &f->fmt.pix);
+ }
+
+ return 0;
+}
+
+static int virtio_video_cam_s_fmt(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ int ret;
+ struct virtio_video_stream *stream = file2stream(file);
+ struct virtio_video_device *vvd = to_virtio_vd(stream->video_dev);
+ struct v4l2_format fmt_mp = { 0 };
+ struct v4l2_format *fmt_set = f;
+
+ if (!vvd->is_mplane_cam) {
+ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ fmt_mp.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+ fmt_set = &fmt_mp;
+
+ virtio_video_pix_fmt_sp2mp(&f->fmt.pix, &fmt_set->fmt.pix_mp);
+ }
+
+ ret = virtio_video_s_fmt(file, fh, fmt_set);
+ if (ret)
+ return ret;
+
+ if (virtio_video_state(stream) == STREAM_STATE_IDLE)
+ virtio_video_state_update(stream, STREAM_STATE_INIT);
+
+ if (!vvd->is_mplane_cam) {
+ if (fmt_set->fmt.pix_mp.num_planes != 1)
+ return -EINVAL;
+
+ virtio_video_pix_fmt_mp2sp(&fmt_set->fmt.pix_mp, &f->fmt.pix);
+ }
+
+ return 0;
+}
+
+static int virtio_video_cam_s_selection(struct file *file, void *fh,
+ struct v4l2_selection *sel)
+{
+ struct virtio_video_stream *stream = file2stream(file);
+ struct virtio_video_device *vvd = to_virtio_vd(stream->video_dev);
+ int ret;
+
+ if (V4L2_TYPE_IS_OUTPUT(sel->type))
+ return -EINVAL;
+
+ switch (sel->target) {
+ case V4L2_SEL_TGT_CROP:
+ stream->out_info.crop.top = sel->r.top;
+ stream->out_info.crop.left = sel->r.left;
+ stream->out_info.crop.width = sel->r.width;
+ stream->out_info.crop.height = sel->r.height;
+ v4l2_info(&vvd->v4l2_dev,
+ "Set : top:%d, left:%d, w:%d, h:%d\n",
+ sel->r.top, sel->r.left, sel->r.width, sel->r.height);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = virtio_video_cmd_set_params(vvd, stream, &stream->out_info,
+ VIRTIO_VIDEO_QUEUE_TYPE_OUTPUT);
+ if (ret)
+ return -EINVAL;
+
+ ret = virtio_video_cmd_get_params(vvd, stream,
+ VIRTIO_VIDEO_QUEUE_TYPE_OUTPUT);
+ return ret;
+}
+
+static const struct v4l2_ioctl_ops virtio_video_cam_ioctl_ops = {
+ .vidioc_querycap = virtio_video_querycap,
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 3, 0))
+ .vidioc_enum_fmt_vid_cap_mplane = virtio_video_cam_enum_fmt_vid_cap,
+#endif
+ .vidioc_try_fmt_vid_cap_mplane = virtio_video_cam_try_fmt,
+ .vidioc_g_fmt_vid_cap_mplane = virtio_video_cam_g_fmt,
+ .vidioc_s_fmt_vid_cap_mplane = virtio_video_cam_s_fmt,
+
+ .vidioc_enum_fmt_vid_cap = virtio_video_cam_enum_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = virtio_video_cam_try_fmt,
+ .vidioc_g_fmt_vid_cap = virtio_video_cam_g_fmt,
+ .vidioc_s_fmt_vid_cap = virtio_video_cam_s_fmt,
+
+ .vidioc_g_selection = virtio_video_g_selection,
+ .vidioc_s_selection = virtio_video_cam_s_selection,
+
+ .vidioc_enum_frameintervals = virtio_video_enum_framemintervals,
+ .vidioc_enum_framesizes = virtio_video_enum_framesizes,
+
+ .vidioc_reqbufs = virtio_video_reqbufs,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = virtio_video_qbuf,
+ .vidioc_dqbuf = virtio_video_dqbuf,
+ .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+
+ .vidioc_subscribe_event = virtio_video_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+void *virtio_video_cam_get_fmt_list(struct virtio_video_device *vvd)
+{
+ return &vvd->output_fmt_list;
+}
+
+static struct virtio_video_device_ops virtio_video_cam_ops = {
+ .init_ctrls = virtio_video_cam_init_ctrls,
+ .init_queues = virtio_video_cam_init_queues,
+ .get_fmt_list = virtio_video_cam_get_fmt_list,
+};
+
+int virtio_video_cam_init(struct virtio_video_device *vvd)
+{
+ ssize_t num;
+ struct video_device *vd = &vvd->video_dev;
+
+ vd->ioctl_ops = &virtio_video_cam_ioctl_ops;
+ vvd->ops = &virtio_video_cam_ops;
+
+ num = strscpy(vd->name, "camera", sizeof(vd->name));
+ if (num < 0)
+ return num;
+
+ return 0;
+}
Code Review / AGL / meta-agl-devel.git / blobdiff