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250 lines
6.9 KiB
250 lines
6.9 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* vivid-vbi-out.c - vbi output support functions. |
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* |
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* Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved. |
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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 "vivid-core.h" |
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#include "vivid-kthread-out.h" |
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#include "vivid-vbi-out.h" |
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#include "vivid-vbi-cap.h" |
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static int vbi_out_queue_setup(struct vb2_queue *vq, |
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unsigned *nbuffers, unsigned *nplanes, |
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unsigned sizes[], 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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bool is_60hz = dev->std_out & V4L2_STD_525_60; |
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unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ? |
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36 * sizeof(struct v4l2_sliced_vbi_data) : |
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1440 * 2 * (is_60hz ? 12 : 18); |
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if (!vivid_is_svid_out(dev)) |
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return -EINVAL; |
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sizes[0] = size; |
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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 vbi_out_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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bool is_60hz = dev->std_out & V4L2_STD_525_60; |
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unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ? |
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36 * sizeof(struct v4l2_sliced_vbi_data) : |
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1440 * 2 * (is_60hz ? 12 : 18); |
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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 vbi_out_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->vbi_out_active); |
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spin_unlock(&dev->slock); |
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} |
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static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned 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->vbi_out_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_out(dev, &dev->vbi_out_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, &dev->vbi_out_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 vbi_out_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_out(dev, &dev->vbi_out_streaming); |
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dev->vbi_out_have_wss = false; |
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dev->vbi_out_have_cc[0] = false; |
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dev->vbi_out_have_cc[1] = false; |
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} |
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static void vbi_out_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_vbi_out); |
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} |
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const struct vb2_ops vivid_vbi_out_qops = { |
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.queue_setup = vbi_out_queue_setup, |
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.buf_prepare = vbi_out_buf_prepare, |
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.buf_queue = vbi_out_buf_queue, |
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.start_streaming = vbi_out_start_streaming, |
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.stop_streaming = vbi_out_stop_streaming, |
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.buf_request_complete = vbi_out_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_g_fmt_vbi_out(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_vbi_format *vbi = &f->fmt.vbi; |
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bool is_60hz = dev->std_out & V4L2_STD_525_60; |
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if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out) |
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return -EINVAL; |
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vbi->sampling_rate = 25000000; |
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vbi->offset = 24; |
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vbi->samples_per_line = 1440; |
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vbi->sample_format = V4L2_PIX_FMT_GREY; |
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vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5; |
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vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5; |
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vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18; |
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vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0; |
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vbi->reserved[0] = 0; |
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vbi->reserved[1] = 0; |
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return 0; |
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} |
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int vidioc_s_fmt_vbi_out(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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int ret = vidioc_g_fmt_vbi_out(file, priv, f); |
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if (ret) |
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return ret; |
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if (vb2_is_busy(&dev->vb_vbi_out_q)) |
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return -EBUSY; |
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dev->stream_sliced_vbi_out = false; |
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dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT; |
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return 0; |
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} |
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int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt) |
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{ |
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struct vivid_dev *dev = video_drvdata(file); |
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struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced; |
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if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out) |
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return -EINVAL; |
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vivid_fill_service_lines(vbi, dev->service_set_out); |
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return 0; |
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} |
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int vidioc_try_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt) |
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{ |
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struct vivid_dev *dev = video_drvdata(file); |
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struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced; |
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bool is_60hz = dev->std_out & V4L2_STD_525_60; |
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u32 service_set = vbi->service_set; |
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if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out) |
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return -EINVAL; |
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service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 : |
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V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B; |
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vivid_fill_service_lines(vbi, service_set); |
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return 0; |
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} |
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int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *fh, |
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struct v4l2_format *fmt) |
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{ |
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struct vivid_dev *dev = video_drvdata(file); |
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struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced; |
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int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt); |
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if (ret) |
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return ret; |
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if (vb2_is_busy(&dev->vb_vbi_out_q)) |
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return -EBUSY; |
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dev->service_set_out = vbi->service_set; |
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dev->stream_sliced_vbi_out = true; |
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dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT; |
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return 0; |
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} |
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void vivid_sliced_vbi_out_process(struct vivid_dev *dev, |
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struct vivid_buffer *buf) |
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{ |
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struct v4l2_sliced_vbi_data *vbi = |
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vb2_plane_vaddr(&buf->vb.vb2_buf, 0); |
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unsigned elems = |
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vb2_get_plane_payload(&buf->vb.vb2_buf, 0) / sizeof(*vbi); |
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dev->vbi_out_have_cc[0] = false; |
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dev->vbi_out_have_cc[1] = false; |
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dev->vbi_out_have_wss = false; |
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while (elems--) { |
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switch (vbi->id) { |
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case V4L2_SLICED_CAPTION_525: |
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if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) { |
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dev->vbi_out_have_cc[!!vbi->field] = true; |
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dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0]; |
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dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1]; |
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} |
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break; |
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case V4L2_SLICED_WSS_625: |
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if ((dev->std_out & V4L2_STD_625_50) && |
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vbi->field == 0 && vbi->line == 23) { |
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dev->vbi_out_have_wss = true; |
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dev->vbi_out_wss[0] = vbi->data[0]; |
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dev->vbi_out_wss[1] = vbi->data[1]; |
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} |
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break; |
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} |
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vbi++; |
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} |
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}
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