| // SPDX-License-Identifier: GPL-2.0+ |
| /* Decoder for virtio video device. |
| * |
| * Copyright 2019 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 <media/v4l2-event.h> |
| #include <media/v4l2-ioctl.h> |
| |
| #include "virtio_video.h" |
| #include "virtio_video_dec.h" |
| |
| static void virtio_video_dec_buf_queue(struct vb2_buffer *vb) |
| { |
| int i, ret; |
| struct vb2_buffer *src_buf; |
| struct vb2_v4l2_buffer *src_vb; |
| struct virtio_video_buffer *virtio_vb; |
| uint32_t data_size[VB2_MAX_PLANES] = {0}; |
| struct vb2_v4l2_buffer *v4l2_vb = to_vb2_v4l2_buffer(vb); |
| struct virtio_video_stream *stream = vb2_get_drv_priv(vb->vb2_queue); |
| struct virtio_video_device *vvd = to_virtio_vd(stream->video_dev); |
| struct virtio_video *vv = vvd->vv; |
| |
| v4l2_m2m_buf_queue(stream->fh.m2m_ctx, v4l2_vb); |
| |
| if ((stream->state != STREAM_STATE_INIT) || |
| !V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) |
| return; |
| |
| src_vb = v4l2_m2m_next_src_buf(stream->fh.m2m_ctx); |
| if (!src_vb) { |
| v4l2_err(&vv->v4l2_dev, "no src buf during initialization\n"); |
| return; |
| } |
| |
| src_buf = &src_vb->vb2_buf; |
| for (i = 0; i < src_buf->num_planes; ++i) |
| data_size[i] = src_buf->planes[i].bytesused; |
| |
| virtio_vb = to_virtio_vb(src_buf); |
| |
| ret = virtio_video_cmd_resource_queue(vv, stream->stream_id, |
| virtio_vb, data_size, |
| src_buf->num_planes, |
| VIRTIO_VIDEO_QUEUE_TYPE_INPUT); |
| if (ret) { |
| v4l2_err(&vv->v4l2_dev, "failed to queue an src buffer\n"); |
| return; |
| } |
| |
| virtio_vb->queued = true; |
| stream->src_cleared = false; |
| src_vb = v4l2_m2m_src_buf_remove(stream->fh.m2m_ctx); |
| } |
| |
| static int virtio_video_dec_start_streaming(struct vb2_queue *vq, |
| unsigned int count) |
| { |
| struct virtio_video_stream *stream = vb2_get_drv_priv(vq); |
| |
| if (!V4L2_TYPE_IS_OUTPUT(vq->type) && |
| stream->state >= STREAM_STATE_INIT) |
| stream->state = STREAM_STATE_RUNNING; |
| |
| return 0; |
| } |
| |
| static void virtio_video_dec_stop_streaming(struct vb2_queue *vq) |
| { |
| int ret, queue_type; |
| bool *cleared; |
| bool is_v4l2_output = V4L2_TYPE_IS_OUTPUT(vq->type); |
| struct virtio_video_stream *stream = vb2_get_drv_priv(vq); |
| struct virtio_video_device *vvd = to_virtio_vd(stream->video_dev); |
| struct virtio_video *vv = vvd->vv; |
| struct vb2_v4l2_buffer *v4l2_vb; |
| |
| if (is_v4l2_output) { |
| cleared = &stream->src_cleared; |
| queue_type = VIRTIO_VIDEO_QUEUE_TYPE_INPUT; |
| } else { |
| cleared = &stream->dst_cleared; |
| queue_type = VIRTIO_VIDEO_QUEUE_TYPE_OUTPUT; |
| } |
| |
| ret = virtio_video_cmd_queue_clear(vv, stream, queue_type); |
| if (ret) { |
| v4l2_err(&vv->v4l2_dev, "failed to clear queue\n"); |
| return; |
| } |
| |
| ret = wait_event_timeout(vv->wq, *cleared, 5 * HZ); |
| if (ret == 0) { |
| v4l2_err(&vv->v4l2_dev, "timed out waiting for queue clear\n"); |
| return; |
| } |
| |
| for (;;) { |
| if (is_v4l2_output) |
| v4l2_vb = v4l2_m2m_src_buf_remove(stream->fh.m2m_ctx); |
| else |
| v4l2_vb = v4l2_m2m_dst_buf_remove(stream->fh.m2m_ctx); |
| if (!v4l2_vb) |
| break; |
| v4l2_m2m_buf_done(v4l2_vb, VB2_BUF_STATE_ERROR); |
| } |
| } |
| |
| static const struct vb2_ops virtio_video_dec_qops = { |
| .queue_setup = virtio_video_queue_setup, |
| .buf_init = virtio_video_buf_init, |
| .buf_prepare = virtio_video_buf_prepare, |
| .buf_cleanup = virtio_video_buf_cleanup, |
| .buf_queue = virtio_video_dec_buf_queue, |
| .start_streaming = virtio_video_dec_start_streaming, |
| .stop_streaming = virtio_video_dec_stop_streaming, |
| .wait_prepare = vb2_ops_wait_prepare, |
| .wait_finish = vb2_ops_wait_finish, |
| }; |
| |
| static int virtio_video_dec_g_volatile_ctrl(struct v4l2_ctrl *ctrl) |
| { |
| int ret = 0; |
| struct virtio_video_stream *stream = ctrl2stream(ctrl); |
| |
| switch (ctrl->id) { |
| case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: |
| if (stream->state >= STREAM_STATE_METADATA) |
| ctrl->val = stream->out_info.min_buffers; |
| else |
| ctrl->val = 0; |
| break; |
| default: |
| ret = -EINVAL; |
| } |
| |
| return ret; |
| } |
| |
| static const struct v4l2_ctrl_ops virtio_video_dec_ctrl_ops = { |
| .g_volatile_ctrl = virtio_video_dec_g_volatile_ctrl, |
| }; |
| |
| int virtio_video_dec_init_ctrls(struct virtio_video_stream *stream) |
| { |
| struct v4l2_ctrl *ctrl; |
| |
| v4l2_ctrl_handler_init(&stream->ctrl_handler, 1); |
| |
| ctrl = v4l2_ctrl_new_std(&stream->ctrl_handler, |
| &virtio_video_dec_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) { |
| int err = stream->ctrl_handler.error; |
| |
| v4l2_ctrl_handler_free(&stream->ctrl_handler); |
| return err; |
| } |
| |
| v4l2_ctrl_handler_setup(&stream->ctrl_handler); |
| |
| return 0; |
| } |
| |
| int virtio_video_dec_init_queues(void *priv, struct vb2_queue *src_vq, |
| struct vb2_queue *dst_vq) |
| { |
| int ret; |
| struct virtio_video_stream *stream = priv; |
| struct virtio_video_device *vvd = to_virtio_vd(stream->video_dev); |
| struct virtio_video *vv = vvd->vv; |
| struct device *dev = vv->v4l2_dev.dev; |
| |
| src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; |
| src_vq->io_modes = VB2_MMAP | VB2_DMABUF; |
| src_vq->drv_priv = stream; |
| src_vq->buf_struct_size = sizeof(struct virtio_video_buffer); |
| src_vq->ops = &virtio_video_dec_qops; |
| src_vq->mem_ops = virtio_video_mem_ops(vv); |
| src_vq->min_buffers_needed = stream->in_info.min_buffers; |
| src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; |
| src_vq->lock = &stream->vq_mutex; |
| src_vq->gfp_flags = virtio_video_gfp_flags(vv); |
| src_vq->dev = dev; |
| |
| ret = vb2_queue_init(src_vq); |
| if (ret) |
| return ret; |
| |
| dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; |
| 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_dec_qops; |
| dst_vq->mem_ops = virtio_video_mem_ops(vv); |
| dst_vq->min_buffers_needed = stream->out_info.min_buffers; |
| dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; |
| dst_vq->lock = &stream->vq_mutex; |
| dst_vq->gfp_flags = virtio_video_gfp_flags(vv); |
| dst_vq->dev = dev; |
| |
| return vb2_queue_init(dst_vq); |
| } |
| |
| static int virtio_video_try_decoder_cmd(struct file *file, void *fh, |
| struct v4l2_decoder_cmd *cmd) |
| { |
| struct virtio_video_stream *stream = file2stream(file); |
| struct virtio_video_device *vvd = video_drvdata(file); |
| struct virtio_video *vv = vvd->vv; |
| |
| if (stream->state == STREAM_STATE_DRAIN) |
| return -EBUSY; |
| |
| switch (cmd->cmd) { |
| case V4L2_DEC_CMD_STOP: |
| case V4L2_DEC_CMD_START: |
| if (cmd->flags != 0) { |
| v4l2_err(&vv->v4l2_dev, "flags=%u are not supported", |
| cmd->flags); |
| return -EINVAL; |
| } |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int virtio_video_decoder_cmd(struct file *file, void *fh, |
| struct v4l2_decoder_cmd *cmd) |
| { |
| int ret; |
| struct vb2_queue *src_vq, *dst_vq; |
| struct virtio_video_stream *stream = file2stream(file); |
| struct virtio_video_device *vvd = video_drvdata(file); |
| struct virtio_video *vv = vvd->vv; |
| int current_state; |
| |
| ret = virtio_video_try_decoder_cmd(file, fh, cmd); |
| if (ret < 0) |
| return ret; |
| |
| dst_vq = v4l2_m2m_get_vq(stream->fh.m2m_ctx, |
| V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE); |
| |
| switch (cmd->cmd) { |
| case V4L2_DEC_CMD_START: |
| vb2_clear_last_buffer_dequeued(dst_vq); |
| if (stream->state == STREAM_STATE_STOPPED) { |
| stream->state = STREAM_STATE_RUNNING; |
| } else { |
| v4l2_warn(&vv->v4l2_dev, "state(%d) is not STOPPED\n", |
| stream->state); |
| } |
| break; |
| case V4L2_DEC_CMD_STOP: |
| src_vq = v4l2_m2m_get_vq(stream->fh.m2m_ctx, |
| V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE); |
| |
| if (!vb2_is_streaming(src_vq)) { |
| v4l2_dbg(1, vv->debug, |
| &vv->v4l2_dev, "output is not streaming\n"); |
| return 0; |
| } |
| |
| if (!vb2_is_streaming(dst_vq)) { |
| v4l2_dbg(1, vv->debug, |
| &vv->v4l2_dev, "capture is not streaming\n"); |
| return 0; |
| } |
| |
| current_state = stream->state; |
| stream->state = STREAM_STATE_DRAIN; |
| ret = virtio_video_cmd_stream_drain(vv, stream->stream_id); |
| if (ret) { |
| stream->state = current_state; |
| v4l2_err(&vv->v4l2_dev, "failed to drain stream\n"); |
| return ret; |
| } |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int virtio_video_dec_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_info *info = NULL; |
| struct video_format *fmt = NULL; |
| unsigned long input_mask = 0; |
| int idx = 0, bit_num = 0; |
| |
| if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) |
| return -EINVAL; |
| |
| if (f->index >= vvd->num_output_fmts) |
| return -EINVAL; |
| |
| info = &stream->in_info; |
| list_for_each_entry(fmt, &vvd->input_fmt_list, formats_list_entry) { |
| if (info->fourcc_format == fmt->desc.format) { |
| input_mask = fmt->desc.mask; |
| break; |
| } |
| } |
| |
| if (input_mask == 0) |
| return -EINVAL; |
| |
| list_for_each_entry(fmt, &vvd->output_fmt_list, formats_list_entry) { |
| if (test_bit(bit_num, &input_mask)) { |
| if (f->index == idx) { |
| f->pixelformat = fmt->desc.format; |
| return 0; |
| } |
| idx++; |
| } |
| bit_num++; |
| } |
| return -EINVAL; |
| } |
| |
| |
| static int virtio_video_dec_enum_fmt_vid_out(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 = NULL; |
| int idx = 0; |
| |
| if (f->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) |
| return -EINVAL; |
| |
| if (f->index >= vvd->num_input_fmts) |
| return -EINVAL; |
| |
| list_for_each_entry(fmt, &vvd->input_fmt_list, formats_list_entry) { |
| if (f->index == idx) { |
| f->pixelformat = fmt->desc.format; |
| return 0; |
| } |
| idx++; |
| } |
| return -EINVAL; |
| } |
| |
| static int virtio_video_dec_s_fmt(struct file *file, void *fh, |
| struct v4l2_format *f) |
| { |
| int ret; |
| struct virtio_video_stream *stream = file2stream(file); |
| |
| ret = virtio_video_s_fmt(file, fh, f); |
| if (ret) |
| return ret; |
| |
| if (V4L2_TYPE_IS_OUTPUT(f->type)) { |
| if (stream->state == STREAM_STATE_IDLE) |
| stream->state = STREAM_STATE_INIT; |
| } |
| |
| return 0; |
| } |
| |
| static const struct v4l2_ioctl_ops virtio_video_dec_ioctl_ops = { |
| .vidioc_querycap = virtio_video_querycap, |
| |
| .vidioc_enum_fmt_vid_cap = virtio_video_dec_enum_fmt_vid_cap, |
| .vidioc_g_fmt_vid_cap = virtio_video_g_fmt, |
| .vidioc_s_fmt_vid_cap = virtio_video_dec_s_fmt, |
| |
| .vidioc_g_fmt_vid_cap_mplane = virtio_video_g_fmt, |
| .vidioc_s_fmt_vid_cap_mplane = virtio_video_dec_s_fmt, |
| |
| .vidioc_enum_fmt_vid_out = virtio_video_dec_enum_fmt_vid_out, |
| .vidioc_g_fmt_vid_out = virtio_video_g_fmt, |
| .vidioc_s_fmt_vid_out = virtio_video_dec_s_fmt, |
| |
| .vidioc_g_fmt_vid_out_mplane = virtio_video_g_fmt, |
| .vidioc_s_fmt_vid_out_mplane = virtio_video_dec_s_fmt, |
| |
| .vidioc_g_selection = virtio_video_g_selection, |
| .vidioc_s_selection = virtio_video_s_selection, |
| |
| .vidioc_try_decoder_cmd = virtio_video_try_decoder_cmd, |
| .vidioc_decoder_cmd = virtio_video_decoder_cmd, |
| .vidioc_enum_frameintervals = virtio_video_enum_framemintervals, |
| .vidioc_enum_framesizes = virtio_video_enum_framesizes, |
| |
| .vidioc_reqbufs = virtio_video_reqbufs, |
| .vidioc_querybuf = v4l2_m2m_ioctl_querybuf, |
| .vidioc_qbuf = v4l2_m2m_ioctl_qbuf, |
| .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf, |
| .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf, |
| .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs, |
| .vidioc_expbuf = v4l2_m2m_ioctl_expbuf, |
| |
| .vidioc_streamon = v4l2_m2m_ioctl_streamon, |
| .vidioc_streamoff = v4l2_m2m_ioctl_streamoff, |
| |
| .vidioc_subscribe_event = virtio_video_subscribe_event, |
| .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
| }; |
| |
| int virtio_video_dec_init(struct video_device *vd) |
| { |
| vd->ioctl_ops = &virtio_video_dec_ioctl_ops; |
| strscpy(vd->name, "stateful-decoder", sizeof(vd->name)); |
| |
| return 0; |
| } |