tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * vivid-vbi-cap.c - vbi capture support functions.
3 *
4 * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
5 *
6 * This program is free software; you may redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
11 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
12 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
13 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
14 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
15 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
16 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17 * SOFTWARE.
18 */
19
20#include <linux/errno.h>
21#include <linux/kernel.h>
22#include <linux/videodev2.h>
23#include <media/v4l2-common.h>
24
25#include "vivid-core.h"
26#include "vivid-kthread-cap.h"
27#include "vivid-vbi-cap.h"
28#include "vivid-vbi-gen.h"
29
30static void vivid_sliced_vbi_cap_fill(struct vivid_dev *dev, unsigned seqnr)
31{
32 struct vivid_vbi_gen_data *vbi_gen = &dev->vbi_gen;
33 bool is_60hz = dev->std_cap & V4L2_STD_525_60;
34
35 vivid_vbi_gen_sliced(vbi_gen, is_60hz, seqnr);
36
37 if (!is_60hz) {
38 if (dev->loop_video) {
39 if (dev->vbi_out_have_wss) {
40 vbi_gen->data[12].data[0] = dev->vbi_out_wss[0];
41 vbi_gen->data[12].data[1] = dev->vbi_out_wss[1];
42 } else {
43 vbi_gen->data[12].id = 0;
44 }
45 } else {
46 switch (tpg_g_video_aspect(&dev->tpg)) {
47 case TPG_VIDEO_ASPECT_14X9_CENTRE:
48 vbi_gen->data[12].data[0] = 0x01;
49 break;
50 case TPG_VIDEO_ASPECT_16X9_CENTRE:
51 vbi_gen->data[12].data[0] = 0x0b;
52 break;
53 case TPG_VIDEO_ASPECT_16X9_ANAMORPHIC:
54 vbi_gen->data[12].data[0] = 0x07;
55 break;
56 case TPG_VIDEO_ASPECT_4X3:
57 default:
58 vbi_gen->data[12].data[0] = 0x08;
59 break;
60 }
61 }
62 } else if (dev->loop_video && is_60hz) {
63 if (dev->vbi_out_have_cc[0]) {
64 vbi_gen->data[0].data[0] = dev->vbi_out_cc[0][0];
65 vbi_gen->data[0].data[1] = dev->vbi_out_cc[0][1];
66 } else {
67 vbi_gen->data[0].id = 0;
68 }
69 if (dev->vbi_out_have_cc[1]) {
70 vbi_gen->data[1].data[0] = dev->vbi_out_cc[1][0];
71 vbi_gen->data[1].data[1] = dev->vbi_out_cc[1][1];
72 } else {
73 vbi_gen->data[1].id = 0;
74 }
75 }
76}
77
78static void vivid_g_fmt_vbi_cap(struct vivid_dev *dev, struct v4l2_vbi_format *vbi)
79{
80 bool is_60hz = dev->std_cap & V4L2_STD_525_60;
81
82 vbi->sampling_rate = 27000000;
83 vbi->offset = 24;
84 vbi->samples_per_line = 1440;
85 vbi->sample_format = V4L2_PIX_FMT_GREY;
86 vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;
87 vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;
88 vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;
89 vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;
90 vbi->reserved[0] = 0;
91 vbi->reserved[1] = 0;
92}
93
94void vivid_raw_vbi_cap_process(struct vivid_dev *dev, struct vivid_buffer *buf)
95{
96 struct v4l2_vbi_format vbi;
97 u8 *vbuf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
98
99 vivid_g_fmt_vbi_cap(dev, &vbi);
100 buf->vb.sequence = dev->vbi_cap_seq_count;
101 if (dev->field_cap == V4L2_FIELD_ALTERNATE)
102 buf->vb.sequence /= 2;
103
104 vivid_sliced_vbi_cap_fill(dev, buf->vb.sequence);
105
106 memset(vbuf, 0x10, vb2_plane_size(&buf->vb.vb2_buf, 0));
107
108 if (!VIVID_INVALID_SIGNAL(dev->std_signal_mode))
109 vivid_vbi_gen_raw(&dev->vbi_gen, &vbi, vbuf);
110
111 buf->vb.vb2_buf.timestamp = ktime_get_ns() + dev->time_wrap_offset;
112}
113
114
115void vivid_sliced_vbi_cap_process(struct vivid_dev *dev,
116 struct vivid_buffer *buf)
117{
118 struct v4l2_sliced_vbi_data *vbuf =
119 vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
120
121 buf->vb.sequence = dev->vbi_cap_seq_count;
122 if (dev->field_cap == V4L2_FIELD_ALTERNATE)
123 buf->vb.sequence /= 2;
124
125 vivid_sliced_vbi_cap_fill(dev, buf->vb.sequence);
126
127 memset(vbuf, 0, vb2_plane_size(&buf->vb.vb2_buf, 0));
128 if (!VIVID_INVALID_SIGNAL(dev->std_signal_mode)) {
129 unsigned i;
130
131 for (i = 0; i < 25; i++)
132 vbuf[i] = dev->vbi_gen.data[i];
133 }
134
135 buf->vb.vb2_buf.timestamp = ktime_get_ns() + dev->time_wrap_offset;
136}
137
138static int vbi_cap_queue_setup(struct vb2_queue *vq,
139 unsigned *nbuffers, unsigned *nplanes,
140 unsigned sizes[], void *alloc_ctxs[])
141{
142 struct vivid_dev *dev = vb2_get_drv_priv(vq);
143 bool is_60hz = dev->std_cap & V4L2_STD_525_60;
144 unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE ?
145 36 * sizeof(struct v4l2_sliced_vbi_data) :
146 1440 * 2 * (is_60hz ? 12 : 18);
147
148 if (!vivid_is_sdtv_cap(dev))
149 return -EINVAL;
150
151 sizes[0] = size;
152
153 if (vq->num_buffers + *nbuffers < 2)
154 *nbuffers = 2 - vq->num_buffers;
155
156 *nplanes = 1;
157 return 0;
158}
159
160static int vbi_cap_buf_prepare(struct vb2_buffer *vb)
161{
162 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
163 bool is_60hz = dev->std_cap & V4L2_STD_525_60;
164 unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE ?
165 36 * sizeof(struct v4l2_sliced_vbi_data) :
166 1440 * 2 * (is_60hz ? 12 : 18);
167
168 dprintk(dev, 1, "%s\n", __func__);
169
170 if (dev->buf_prepare_error) {
171 /*
172 * Error injection: test what happens if buf_prepare() returns
173 * an error.
174 */
175 dev->buf_prepare_error = false;
176 return -EINVAL;
177 }
178 if (vb2_plane_size(vb, 0) < size) {
179 dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
180 __func__, vb2_plane_size(vb, 0), size);
181 return -EINVAL;
182 }
183 vb2_set_plane_payload(vb, 0, size);
184
185 return 0;
186}
187
188static void vbi_cap_buf_queue(struct vb2_buffer *vb)
189{
190 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
191 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
192 struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);
193
194 dprintk(dev, 1, "%s\n", __func__);
195
196 spin_lock(&dev->slock);
197 list_add_tail(&buf->list, &dev->vbi_cap_active);
198 spin_unlock(&dev->slock);
199}
200
201static int vbi_cap_start_streaming(struct vb2_queue *vq, unsigned count)
202{
203 struct vivid_dev *dev = vb2_get_drv_priv(vq);
204 int err;
205
206 dprintk(dev, 1, "%s\n", __func__);
207 dev->vbi_cap_seq_count = 0;
208 if (dev->start_streaming_error) {
209 dev->start_streaming_error = false;
210 err = -EINVAL;
211 } else {
212 err = vivid_start_generating_vid_cap(dev, &dev->vbi_cap_streaming);
213 }
214 if (err) {
215 struct vivid_buffer *buf, *tmp;
216
217 list_for_each_entry_safe(buf, tmp, &dev->vbi_cap_active, list) {
218 list_del(&buf->list);
219 vb2_buffer_done(&buf->vb.vb2_buf,
220 VB2_BUF_STATE_QUEUED);
221 }
222 }
223 return err;
224}
225
226/* abort streaming and wait for last buffer */
227static void vbi_cap_stop_streaming(struct vb2_queue *vq)
228{
229 struct vivid_dev *dev = vb2_get_drv_priv(vq);
230
231 dprintk(dev, 1, "%s\n", __func__);
232 vivid_stop_generating_vid_cap(dev, &dev->vbi_cap_streaming);
233}
234
235const struct vb2_ops vivid_vbi_cap_qops = {
236 .queue_setup = vbi_cap_queue_setup,
237 .buf_prepare = vbi_cap_buf_prepare,
238 .buf_queue = vbi_cap_buf_queue,
239 .start_streaming = vbi_cap_start_streaming,
240 .stop_streaming = vbi_cap_stop_streaming,
241 .wait_prepare = vb2_ops_wait_prepare,
242 .wait_finish = vb2_ops_wait_finish,
243};
244
245int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
246 struct v4l2_format *f)
247{
248 struct vivid_dev *dev = video_drvdata(file);
249 struct v4l2_vbi_format *vbi = &f->fmt.vbi;
250
251 if (!vivid_is_sdtv_cap(dev) || !dev->has_raw_vbi_cap)
252 return -EINVAL;
253
254 vivid_g_fmt_vbi_cap(dev, vbi);
255 return 0;
256}
257
258int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
259 struct v4l2_format *f)
260{
261 struct vivid_dev *dev = video_drvdata(file);
262 int ret = vidioc_g_fmt_vbi_cap(file, priv, f);
263
264 if (ret)
265 return ret;
266 if (dev->stream_sliced_vbi_cap && vb2_is_busy(&dev->vb_vbi_cap_q))
267 return -EBUSY;
268 dev->stream_sliced_vbi_cap = false;
269 dev->vbi_cap_dev.queue->type = V4L2_BUF_TYPE_VBI_CAPTURE;
270 return 0;
271}
272
273void vivid_fill_service_lines(struct v4l2_sliced_vbi_format *vbi, u32 service_set)
274{
275 vbi->io_size = sizeof(struct v4l2_sliced_vbi_data) * 36;
276 vbi->service_set = service_set;
277 memset(vbi->service_lines, 0, sizeof(vbi->service_lines));
278 memset(vbi->reserved, 0, sizeof(vbi->reserved));
279
280 if (vbi->service_set == 0)
281 return;
282
283 if (vbi->service_set & V4L2_SLICED_CAPTION_525) {
284 vbi->service_lines[0][21] = V4L2_SLICED_CAPTION_525;
285 vbi->service_lines[1][21] = V4L2_SLICED_CAPTION_525;
286 }
287 if (vbi->service_set & V4L2_SLICED_WSS_625) {
288 unsigned i;
289
290 for (i = 7; i <= 18; i++)
291 vbi->service_lines[0][i] =
292 vbi->service_lines[1][i] = V4L2_SLICED_TELETEXT_B;
293 vbi->service_lines[0][23] = V4L2_SLICED_WSS_625;
294 }
295}
296
297int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *fh, struct v4l2_format *fmt)
298{
299 struct vivid_dev *dev = video_drvdata(file);
300 struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
301
302 if (!vivid_is_sdtv_cap(dev) || !dev->has_sliced_vbi_cap)
303 return -EINVAL;
304
305 vivid_fill_service_lines(vbi, dev->service_set_cap);
306 return 0;
307}
308
309int vidioc_try_fmt_sliced_vbi_cap(struct file *file, void *fh, struct v4l2_format *fmt)
310{
311 struct vivid_dev *dev = video_drvdata(file);
312 struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
313 bool is_60hz = dev->std_cap & V4L2_STD_525_60;
314 u32 service_set = vbi->service_set;
315
316 if (!vivid_is_sdtv_cap(dev) || !dev->has_sliced_vbi_cap)
317 return -EINVAL;
318
319 service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :
320 V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
321 vivid_fill_service_lines(vbi, service_set);
322 return 0;
323}
324
325int vidioc_s_fmt_sliced_vbi_cap(struct file *file, void *fh, struct v4l2_format *fmt)
326{
327 struct vivid_dev *dev = video_drvdata(file);
328 struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
329 int ret = vidioc_try_fmt_sliced_vbi_cap(file, fh, fmt);
330
331 if (ret)
332 return ret;
333 if (!dev->stream_sliced_vbi_cap && vb2_is_busy(&dev->vb_vbi_cap_q))
334 return -EBUSY;
335 dev->service_set_cap = vbi->service_set;
336 dev->stream_sliced_vbi_cap = true;
337 dev->vbi_cap_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_CAPTURE;
338 return 0;
339}
340
341int vidioc_g_sliced_vbi_cap(struct file *file, void *fh, struct v4l2_sliced_vbi_cap *cap)
342{
343 struct vivid_dev *dev = video_drvdata(file);
344 struct video_device *vdev = video_devdata(file);
345 bool is_60hz;
346
347 if (vdev->vfl_dir == VFL_DIR_RX) {
348 is_60hz = dev->std_cap & V4L2_STD_525_60;
349 if (!vivid_is_sdtv_cap(dev) || !dev->has_sliced_vbi_cap ||
350 cap->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
351 return -EINVAL;
352 } else {
353 is_60hz = dev->std_out & V4L2_STD_525_60;
354 if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out ||
355 cap->type != V4L2_BUF_TYPE_SLICED_VBI_OUTPUT)
356 return -EINVAL;
357 }
358
359 cap->service_set = is_60hz ? V4L2_SLICED_CAPTION_525 :
360 V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
361 if (is_60hz) {
362 cap->service_lines[0][21] = V4L2_SLICED_CAPTION_525;
363 cap->service_lines[1][21] = V4L2_SLICED_CAPTION_525;
364 } else {
365 unsigned i;
366
367 for (i = 7; i <= 18; i++)
368 cap->service_lines[0][i] =
369 cap->service_lines[1][i] = V4L2_SLICED_TELETEXT_B;
370 cap->service_lines[0][23] = V4L2_SLICED_WSS_625;
371 }
372 return 0;
373}