1 // SPDX-License-Identifier: GPL-2.0-only
3 * vivid-vbi-out.c - vbi output support functions.
5 * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
8 #include <linux/errno.h>
9 #include <linux/kernel.h>
10 #include <linux/videodev2.h>
11 #include <media/v4l2-common.h>
13 #include "vivid-core.h"
14 #include "vivid-kthread-out.h"
15 #include "vivid-vbi-out.h"
16 #include "vivid-vbi-cap.h"
18 static int vbi_out_queue_setup(struct vb2_queue *vq,
19 unsigned *nbuffers, unsigned *nplanes,
20 unsigned sizes[], struct device *alloc_devs[])
22 struct vivid_dev *dev = vb2_get_drv_priv(vq);
23 bool is_60hz = dev->std_out & V4L2_STD_525_60;
24 unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
25 36 * sizeof(struct v4l2_sliced_vbi_data) :
26 1440 * 2 * (is_60hz ? 12 : 18);
28 if (!vivid_is_svid_out(dev))
33 if (vq->num_buffers + *nbuffers < 2)
34 *nbuffers = 2 - vq->num_buffers;
40 static int vbi_out_buf_prepare(struct vb2_buffer *vb)
42 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
43 bool is_60hz = dev->std_out & V4L2_STD_525_60;
44 unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
45 36 * sizeof(struct v4l2_sliced_vbi_data) :
46 1440 * 2 * (is_60hz ? 12 : 18);
48 dprintk(dev, 1, "%s\n", __func__);
50 if (dev->buf_prepare_error) {
52 * Error injection: test what happens if buf_prepare() returns
55 dev->buf_prepare_error = false;
58 if (vb2_plane_size(vb, 0) < size) {
59 dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
60 __func__, vb2_plane_size(vb, 0), size);
63 vb2_set_plane_payload(vb, 0, size);
68 static void vbi_out_buf_queue(struct vb2_buffer *vb)
70 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
71 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
72 struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);
74 dprintk(dev, 1, "%s\n", __func__);
76 spin_lock(&dev->slock);
77 list_add_tail(&buf->list, &dev->vbi_out_active);
78 spin_unlock(&dev->slock);
81 static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned count)
83 struct vivid_dev *dev = vb2_get_drv_priv(vq);
86 dprintk(dev, 1, "%s\n", __func__);
87 dev->vbi_out_seq_count = 0;
88 if (dev->start_streaming_error) {
89 dev->start_streaming_error = false;
92 err = vivid_start_generating_vid_out(dev, &dev->vbi_out_streaming);
95 struct vivid_buffer *buf, *tmp;
97 list_for_each_entry_safe(buf, tmp, &dev->vbi_out_active, list) {
99 vb2_buffer_done(&buf->vb.vb2_buf,
100 VB2_BUF_STATE_QUEUED);
106 /* abort streaming and wait for last buffer */
107 static void vbi_out_stop_streaming(struct vb2_queue *vq)
109 struct vivid_dev *dev = vb2_get_drv_priv(vq);
111 dprintk(dev, 1, "%s\n", __func__);
112 vivid_stop_generating_vid_out(dev, &dev->vbi_out_streaming);
113 dev->vbi_out_have_wss = false;
114 dev->vbi_out_have_cc[0] = false;
115 dev->vbi_out_have_cc[1] = false;
118 static void vbi_out_buf_request_complete(struct vb2_buffer *vb)
120 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
122 v4l2_ctrl_request_complete(vb->req_obj.req, &dev->ctrl_hdl_vbi_out);
125 const struct vb2_ops vivid_vbi_out_qops = {
126 .queue_setup = vbi_out_queue_setup,
127 .buf_prepare = vbi_out_buf_prepare,
128 .buf_queue = vbi_out_buf_queue,
129 .start_streaming = vbi_out_start_streaming,
130 .stop_streaming = vbi_out_stop_streaming,
131 .buf_request_complete = vbi_out_buf_request_complete,
132 .wait_prepare = vb2_ops_wait_prepare,
133 .wait_finish = vb2_ops_wait_finish,
136 int vidioc_g_fmt_vbi_out(struct file *file, void *priv,
137 struct v4l2_format *f)
139 struct vivid_dev *dev = video_drvdata(file);
140 struct v4l2_vbi_format *vbi = &f->fmt.vbi;
141 bool is_60hz = dev->std_out & V4L2_STD_525_60;
143 if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out)
146 vbi->sampling_rate = 25000000;
148 vbi->samples_per_line = 1440;
149 vbi->sample_format = V4L2_PIX_FMT_GREY;
150 vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;
151 vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;
152 vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;
153 vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;
154 vbi->reserved[0] = 0;
155 vbi->reserved[1] = 0;
159 int vidioc_s_fmt_vbi_out(struct file *file, void *priv,
160 struct v4l2_format *f)
162 struct vivid_dev *dev = video_drvdata(file);
163 int ret = vidioc_g_fmt_vbi_out(file, priv, f);
167 if (vb2_is_busy(&dev->vb_vbi_out_q))
169 dev->stream_sliced_vbi_out = false;
170 dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT;
174 int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
176 struct vivid_dev *dev = video_drvdata(file);
177 struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
179 if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
182 vivid_fill_service_lines(vbi, dev->service_set_out);
186 int vidioc_try_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
188 struct vivid_dev *dev = video_drvdata(file);
189 struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
190 bool is_60hz = dev->std_out & V4L2_STD_525_60;
191 u32 service_set = vbi->service_set;
193 if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
196 service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :
197 V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
198 vivid_fill_service_lines(vbi, service_set);
202 int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *fh,
203 struct v4l2_format *fmt)
205 struct vivid_dev *dev = video_drvdata(file);
206 struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
207 int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt);
211 if (vb2_is_busy(&dev->vb_vbi_out_q))
213 dev->service_set_out = vbi->service_set;
214 dev->stream_sliced_vbi_out = true;
215 dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT;
219 void vivid_sliced_vbi_out_process(struct vivid_dev *dev,
220 struct vivid_buffer *buf)
222 struct v4l2_sliced_vbi_data *vbi =
223 vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
225 vb2_get_plane_payload(&buf->vb.vb2_buf, 0) / sizeof(*vbi);
227 dev->vbi_out_have_cc[0] = false;
228 dev->vbi_out_have_cc[1] = false;
229 dev->vbi_out_have_wss = false;
232 case V4L2_SLICED_CAPTION_525:
233 if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) {
234 dev->vbi_out_have_cc[!!vbi->field] = true;
235 dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0];
236 dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1];
239 case V4L2_SLICED_WSS_625:
240 if ((dev->std_out & V4L2_STD_625_50) &&
241 vbi->field == 0 && vbi->line == 23) {
242 dev->vbi_out_have_wss = true;
243 dev->vbi_out_wss[0] = vbi->data[0];
244 dev->vbi_out_wss[1] = vbi->data[1];