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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / media / test-drivers / vivid / vivid-vid-out.c
blobac1e981e83420bc981fa72f2ff36ebffc6076beb
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * vivid-vid-out.c - video output support functions.
4 *
5 * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
6 */
7
8 #include <linux/errno.h>
9 #include <linux/kernel.h>
10 #include <linux/sched.h>
11 #include <linux/videodev2.h>
12 #include <linux/v4l2-dv-timings.h>
13 #include <media/v4l2-common.h>
14 #include <media/v4l2-event.h>
15 #include <media/v4l2-dv-timings.h>
16 #include <media/v4l2-rect.h>
17
18 #include "vivid-core.h"
19 #include "vivid-vid-common.h"
20 #include "vivid-kthread-out.h"
21 #include "vivid-vid-out.h"
22
23 static int vid_out_queue_setup(struct vb2_queue *vq,
24 unsigned *nbuffers, unsigned *nplanes,
25 unsigned sizes[], struct device *alloc_devs[])
26 {
27 struct vivid_dev *dev = vb2_get_drv_priv(vq);
28 const struct vivid_fmt *vfmt = dev->fmt_out;
29 unsigned planes = vfmt->buffers;
30 unsigned h = dev->fmt_out_rect.height;
31 unsigned int size = dev->bytesperline_out[0] * h + vfmt->data_offset[0];
32 unsigned p;
33
34 for (p = vfmt->buffers; p < vfmt->planes; p++)
35 size += dev->bytesperline_out[p] * h / vfmt->vdownsampling[p] +
36 vfmt->data_offset[p];
37
38 if (dev->field_out == V4L2_FIELD_ALTERNATE) {
39 /*
40 * You cannot use write() with FIELD_ALTERNATE since the field
41 * information (TOP/BOTTOM) cannot be passed to the kernel.
42 */
43 if (vb2_fileio_is_active(vq))
44 return -EINVAL;
45 }
46
47 if (dev->queue_setup_error) {
48 /*
49 * Error injection: test what happens if queue_setup() returns
50 * an error.
51 */
52 dev->queue_setup_error = false;
53 return -EINVAL;
54 }
55
56 if (*nplanes) {
57 /*
58 * Check if the number of requested planes match
59 * the number of planes in the current format. You can't mix that.
60 */
61 if (*nplanes != planes)
62 return -EINVAL;
63 if (sizes[0] < size)
64 return -EINVAL;
65 for (p = 1; p < planes; p++) {
66 if (sizes[p] < dev->bytesperline_out[p] * h +
67 vfmt->data_offset[p])
68 return -EINVAL;
69 }
70 } else {
71 for (p = 0; p < planes; p++)
72 sizes[p] = p ? dev->bytesperline_out[p] * h +
73 vfmt->data_offset[p] : size;
74 }
75
76 if (vq->num_buffers + *nbuffers < 2)
77 *nbuffers = 2 - vq->num_buffers;
78
79 *nplanes = planes;
80
81 dprintk(dev, 1, "%s: count=%d\n", __func__, *nbuffers);
82 for (p = 0; p < planes; p++)
83 dprintk(dev, 1, "%s: size[%u]=%u\n", __func__, p, sizes[p]);
84 return 0;
85 }
86
87 static int vid_out_buf_out_validate(struct vb2_buffer *vb)
88 {
89 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
90 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
91
92 dprintk(dev, 1, "%s\n", __func__);
93
94 if (dev->field_out != V4L2_FIELD_ALTERNATE)
95 vbuf->field = dev->field_out;
96 else if (vbuf->field != V4L2_FIELD_TOP &&
97 vbuf->field != V4L2_FIELD_BOTTOM)
98 return -EINVAL;
99 return 0;
100 }
101
102 static int vid_out_buf_prepare(struct vb2_buffer *vb)
103 {
104 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
105 const struct vivid_fmt *vfmt = dev->fmt_out;
106 unsigned int planes = vfmt->buffers;
107 unsigned int h = dev->fmt_out_rect.height;
108 unsigned int size = dev->bytesperline_out[0] * h;
109 unsigned p;
110
111 for (p = vfmt->buffers; p < vfmt->planes; p++)
112 size += dev->bytesperline_out[p] * h / vfmt->vdownsampling[p];
113
114 dprintk(dev, 1, "%s\n", __func__);
115
116 if (WARN_ON(NULL == dev->fmt_out))
117 return -EINVAL;
118
119 if (dev->buf_prepare_error) {
120 /*
121 * Error injection: test what happens if buf_prepare() returns
122 * an error.
123 */
124 dev->buf_prepare_error = false;
125 return -EINVAL;
126 }
127
128 for (p = 0; p < planes; p++) {
129 if (p)
130 size = dev->bytesperline_out[p] * h;
131 size += vb->planes[p].data_offset;
132
133 if (vb2_get_plane_payload(vb, p) < size) {
134 dprintk(dev, 1, "%s the payload is too small for plane %u (%lu < %u)\n",
135 __func__, p, vb2_get_plane_payload(vb, p), size);
136 return -EINVAL;
137 }
138 }
139
140 return 0;
141 }
142
143 static void vid_out_buf_queue(struct vb2_buffer *vb)
144 {
145 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
146 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
147 struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);
148
149 dprintk(dev, 1, "%s\n", __func__);
150
151 spin_lock(&dev->slock);
152 list_add_tail(&buf->list, &dev->vid_out_active);
153 spin_unlock(&dev->slock);
154 }
155
156 static int vid_out_start_streaming(struct vb2_queue *vq, unsigned count)
157 {
158 struct vivid_dev *dev = vb2_get_drv_priv(vq);
159 int err;
160
161 if (vb2_is_streaming(&dev->vb_vid_cap_q))
162 dev->can_loop_video = vivid_vid_can_loop(dev);
163
164 dev->vid_out_seq_count = 0;
165 dprintk(dev, 1, "%s\n", __func__);
166 if (dev->start_streaming_error) {
167 dev->start_streaming_error = false;
168 err = -EINVAL;
169 } else {
170 err = vivid_start_generating_vid_out(dev, &dev->vid_out_streaming);
171 }
172 if (err) {
173 struct vivid_buffer *buf, *tmp;
174
175 list_for_each_entry_safe(buf, tmp, &dev->vid_out_active, list) {
176 list_del(&buf->list);
177 vb2_buffer_done(&buf->vb.vb2_buf,
178 VB2_BUF_STATE_QUEUED);
179 }
180 }
181 return err;
182 }
183
184 /* abort streaming and wait for last buffer */
185 static void vid_out_stop_streaming(struct vb2_queue *vq)
186 {
187 struct vivid_dev *dev = vb2_get_drv_priv(vq);
188
189 dprintk(dev, 1, "%s\n", __func__);
190 vivid_stop_generating_vid_out(dev, &dev->vid_out_streaming);
191 dev->can_loop_video = false;
192 }
193
194 static void vid_out_buf_request_complete(struct vb2_buffer *vb)
195 {
196 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
197
198 v4l2_ctrl_request_complete(vb->req_obj.req, &dev->ctrl_hdl_vid_out);
199 }
200
201 const struct vb2_ops vivid_vid_out_qops = {
202 .queue_setup = vid_out_queue_setup,
203 .buf_out_validate = vid_out_buf_out_validate,
204 .buf_prepare = vid_out_buf_prepare,
205 .buf_queue = vid_out_buf_queue,
206 .start_streaming = vid_out_start_streaming,
207 .stop_streaming = vid_out_stop_streaming,
208 .buf_request_complete = vid_out_buf_request_complete,
209 .wait_prepare = vb2_ops_wait_prepare,
210 .wait_finish = vb2_ops_wait_finish,
211 };
212
213 /*
214 * Called whenever the format has to be reset which can occur when
215 * changing outputs, standard, timings, etc.
216 */
217 void vivid_update_format_out(struct vivid_dev *dev)
218 {
219 struct v4l2_bt_timings *bt = &dev->dv_timings_out.bt;
220 unsigned size, p;
221 u64 pixelclock;
222
223 switch (dev->output_type[dev->output]) {
224 case SVID:
225 default:
226 dev->field_out = dev->tv_field_out;
227 dev->sink_rect.width = 720;
228 if (dev->std_out & V4L2_STD_525_60) {
229 dev->sink_rect.height = 480;
230 dev->timeperframe_vid_out = (struct v4l2_fract) { 1001, 30000 };
231 dev->service_set_out = V4L2_SLICED_CAPTION_525;
232 } else {
233 dev->sink_rect.height = 576;
234 dev->timeperframe_vid_out = (struct v4l2_fract) { 1000, 25000 };
235 dev->service_set_out = V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
236 }
237 dev->colorspace_out = V4L2_COLORSPACE_SMPTE170M;
238 break;
239 case HDMI:
240 dev->sink_rect.width = bt->width;
241 dev->sink_rect.height = bt->height;
242 size = V4L2_DV_BT_FRAME_WIDTH(bt) * V4L2_DV_BT_FRAME_HEIGHT(bt);
243
244 if (can_reduce_fps(bt) && (bt->flags & V4L2_DV_FL_REDUCED_FPS))
245 pixelclock = div_u64(bt->pixelclock * 1000, 1001);
246 else
247 pixelclock = bt->pixelclock;
248
249 dev->timeperframe_vid_out = (struct v4l2_fract) {
250 size / 100, (u32)pixelclock / 100
251 };
252 if (bt->interlaced)
253 dev->field_out = V4L2_FIELD_ALTERNATE;
254 else
255 dev->field_out = V4L2_FIELD_NONE;
256 if (!dev->dvi_d_out && (bt->flags & V4L2_DV_FL_IS_CE_VIDEO)) {
257 if (bt->width == 720 && bt->height <= 576)
258 dev->colorspace_out = V4L2_COLORSPACE_SMPTE170M;
259 else
260 dev->colorspace_out = V4L2_COLORSPACE_REC709;
261 } else {
262 dev->colorspace_out = V4L2_COLORSPACE_SRGB;
263 }
264 break;
265 }
266 dev->xfer_func_out = V4L2_XFER_FUNC_DEFAULT;
267 dev->ycbcr_enc_out = V4L2_YCBCR_ENC_DEFAULT;
268 dev->hsv_enc_out = V4L2_HSV_ENC_180;
269 dev->quantization_out = V4L2_QUANTIZATION_DEFAULT;
270 dev->compose_out = dev->sink_rect;
271 dev->compose_bounds_out = dev->sink_rect;
272 dev->crop_out = dev->compose_out;
273 if (V4L2_FIELD_HAS_T_OR_B(dev->field_out))
274 dev->crop_out.height /= 2;
275 dev->fmt_out_rect = dev->crop_out;
276 for (p = 0; p < dev->fmt_out->planes; p++)
277 dev->bytesperline_out[p] =
278 (dev->sink_rect.width * dev->fmt_out->bit_depth[p]) / 8;
279 }
280
281 /* Map the field to something that is valid for the current output */
282 static enum v4l2_field vivid_field_out(struct vivid_dev *dev, enum v4l2_field field)
283 {
284 if (vivid_is_svid_out(dev)) {
285 switch (field) {
286 case V4L2_FIELD_INTERLACED_TB:
287 case V4L2_FIELD_INTERLACED_BT:
288 case V4L2_FIELD_SEQ_TB:
289 case V4L2_FIELD_SEQ_BT:
290 case V4L2_FIELD_ALTERNATE:
291 return field;
292 case V4L2_FIELD_INTERLACED:
293 default:
294 return V4L2_FIELD_INTERLACED;
295 }
296 }
297 if (vivid_is_hdmi_out(dev))
298 return dev->dv_timings_out.bt.interlaced ? V4L2_FIELD_ALTERNATE :
299 V4L2_FIELD_NONE;
300 return V4L2_FIELD_NONE;
301 }
302
303 static enum tpg_pixel_aspect vivid_get_pixel_aspect(const struct vivid_dev *dev)
304 {
305 if (vivid_is_svid_out(dev))
306 return (dev->std_out & V4L2_STD_525_60) ?
307 TPG_PIXEL_ASPECT_NTSC : TPG_PIXEL_ASPECT_PAL;
308
309 if (vivid_is_hdmi_out(dev) &&
310 dev->sink_rect.width == 720 && dev->sink_rect.height <= 576)
311 return dev->sink_rect.height == 480 ?
312 TPG_PIXEL_ASPECT_NTSC : TPG_PIXEL_ASPECT_PAL;
313
314 return TPG_PIXEL_ASPECT_SQUARE;
315 }
316
317 int vivid_g_fmt_vid_out(struct file *file, void *priv,
318 struct v4l2_format *f)
319 {
320 struct vivid_dev *dev = video_drvdata(file);
321 struct v4l2_pix_format_mplane *mp = &f->fmt.pix_mp;
322 const struct vivid_fmt *fmt = dev->fmt_out;
323 unsigned p;
324
325 mp->width = dev->fmt_out_rect.width;
326 mp->height = dev->fmt_out_rect.height;
327 mp->field = dev->field_out;
328 mp->pixelformat = fmt->fourcc;
329 mp->colorspace = dev->colorspace_out;
330 mp->xfer_func = dev->xfer_func_out;
331 mp->ycbcr_enc = dev->ycbcr_enc_out;
332 mp->quantization = dev->quantization_out;
333 mp->num_planes = fmt->buffers;
334 for (p = 0; p < mp->num_planes; p++) {
335 mp->plane_fmt[p].bytesperline = dev->bytesperline_out[p];
336 mp->plane_fmt[p].sizeimage =
337 mp->plane_fmt[p].bytesperline * mp->height +
338 fmt->data_offset[p];
339 }
340 for (p = fmt->buffers; p < fmt->planes; p++) {
341 unsigned stride = dev->bytesperline_out[p];
342
343 mp->plane_fmt[0].sizeimage +=
344 (stride * mp->height) / fmt->vdownsampling[p];
345 }
346 return 0;
347 }
348
349 int vivid_try_fmt_vid_out(struct file *file, void *priv,
350 struct v4l2_format *f)
351 {
352 struct vivid_dev *dev = video_drvdata(file);
353 struct v4l2_bt_timings *bt = &dev->dv_timings_out.bt;
354 struct v4l2_pix_format_mplane *mp = &f->fmt.pix_mp;
355 struct v4l2_plane_pix_format *pfmt = mp->plane_fmt;
356 const struct vivid_fmt *fmt;
357 unsigned bytesperline, max_bpl;
358 unsigned factor = 1;
359 unsigned w, h;
360 unsigned p;
361
362 fmt = vivid_get_format(dev, mp->pixelformat);
363 if (!fmt) {
364 dprintk(dev, 1, "Fourcc format (0x%08x) unknown.\n",
365 mp->pixelformat);
366 mp->pixelformat = V4L2_PIX_FMT_YUYV;
367 fmt = vivid_get_format(dev, mp->pixelformat);
368 }
369
370 mp->field = vivid_field_out(dev, mp->field);
371 if (vivid_is_svid_out(dev)) {
372 w = 720;
373 h = (dev->std_out & V4L2_STD_525_60) ? 480 : 576;
374 } else {
375 w = dev->sink_rect.width;
376 h = dev->sink_rect.height;
377 }
378 if (V4L2_FIELD_HAS_T_OR_B(mp->field))
379 factor = 2;
380 if (!dev->has_scaler_out && !dev->has_crop_out && !dev->has_compose_out) {
381 mp->width = w;
382 mp->height = h / factor;
383 } else {
384 struct v4l2_rect r = { 0, 0, mp->width, mp->height * factor };
385
386 v4l2_rect_set_min_size(&r, &vivid_min_rect);
387 v4l2_rect_set_max_size(&r, &vivid_max_rect);
388 if (dev->has_scaler_out && !dev->has_crop_out) {
389 struct v4l2_rect max_r = { 0, 0, MAX_ZOOM * w, MAX_ZOOM * h };
390
391 v4l2_rect_set_max_size(&r, &max_r);
392 } else if (!dev->has_scaler_out && dev->has_compose_out && !dev->has_crop_out) {
393 v4l2_rect_set_max_size(&r, &dev->sink_rect);
394 } else if (!dev->has_scaler_out && !dev->has_compose_out) {
395 v4l2_rect_set_min_size(&r, &dev->sink_rect);
396 }
397 mp->width = r.width;
398 mp->height = r.height / factor;
399 }
400
401 /* This driver supports custom bytesperline values */
402
403 mp->num_planes = fmt->buffers;
404 for (p = 0; p < fmt->buffers; p++) {
405 /* Calculate the minimum supported bytesperline value */
406 bytesperline = (mp->width * fmt->bit_depth[p]) >> 3;
407 /* Calculate the maximum supported bytesperline value */
408 max_bpl = (MAX_ZOOM * MAX_WIDTH * fmt->bit_depth[p]) >> 3;
409
410 if (pfmt[p].bytesperline > max_bpl)
411 pfmt[p].bytesperline = max_bpl;
412 if (pfmt[p].bytesperline < bytesperline)
413 pfmt[p].bytesperline = bytesperline;
414
415 pfmt[p].sizeimage = (pfmt[p].bytesperline * mp->height) /
416 fmt->vdownsampling[p] + fmt->data_offset[p];
417
418 memset(pfmt[p].reserved, 0, sizeof(pfmt[p].reserved));
419 }
420 for (p = fmt->buffers; p < fmt->planes; p++)
421 pfmt[0].sizeimage += (pfmt[0].bytesperline * mp->height *
422 (fmt->bit_depth[p] / fmt->vdownsampling[p])) /
423 (fmt->bit_depth[0] / fmt->vdownsampling[0]);
424
425 mp->xfer_func = V4L2_XFER_FUNC_DEFAULT;
426 mp->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
427 mp->quantization = V4L2_QUANTIZATION_DEFAULT;
428 if (vivid_is_svid_out(dev)) {
429 mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
430 } else if (dev->dvi_d_out || !(bt->flags & V4L2_DV_FL_IS_CE_VIDEO)) {
431 mp->colorspace = V4L2_COLORSPACE_SRGB;
432 if (dev->dvi_d_out)
433 mp->quantization = V4L2_QUANTIZATION_LIM_RANGE;
434 } else if (bt->width == 720 && bt->height <= 576) {
435 mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
436 } else if (mp->colorspace != V4L2_COLORSPACE_SMPTE170M &&
437 mp->colorspace != V4L2_COLORSPACE_REC709 &&
438 mp->colorspace != V4L2_COLORSPACE_OPRGB &&
439 mp->colorspace != V4L2_COLORSPACE_BT2020 &&
440 mp->colorspace != V4L2_COLORSPACE_SRGB) {
441 mp->colorspace = V4L2_COLORSPACE_REC709;
442 }
443 memset(mp->reserved, 0, sizeof(mp->reserved));
444 return 0;
445 }
446
447 int vivid_s_fmt_vid_out(struct file *file, void *priv,
448 struct v4l2_format *f)
449 {
450 struct v4l2_pix_format_mplane *mp = &f->fmt.pix_mp;
451 struct vivid_dev *dev = video_drvdata(file);
452 struct v4l2_rect *crop = &dev->crop_out;
453 struct v4l2_rect *compose = &dev->compose_out;
454 struct vb2_queue *q = &dev->vb_vid_out_q;
455 int ret = vivid_try_fmt_vid_out(file, priv, f);
456 unsigned factor = 1;
457 unsigned p;
458
459 if (ret < 0)
460 return ret;
461
462 if (vb2_is_busy(q) &&
463 (vivid_is_svid_out(dev) ||
464 mp->width != dev->fmt_out_rect.width ||
465 mp->height != dev->fmt_out_rect.height ||
466 mp->pixelformat != dev->fmt_out->fourcc ||
467 mp->field != dev->field_out)) {
468 dprintk(dev, 1, "%s device busy\n", __func__);
469 return -EBUSY;
470 }
471
472 /*
473 * Allow for changing the colorspace on the fly. Useful for testing
474 * purposes, and it is something that HDMI transmitters are able
475 * to do.
476 */
477 if (vb2_is_busy(q))
478 goto set_colorspace;
479
480 dev->fmt_out = vivid_get_format(dev, mp->pixelformat);
481 if (V4L2_FIELD_HAS_T_OR_B(mp->field))
482 factor = 2;
483
484 if (dev->has_scaler_out || dev->has_crop_out || dev->has_compose_out) {
485 struct v4l2_rect r = { 0, 0, mp->width, mp->height };
486
487 if (dev->has_scaler_out) {
488 if (dev->has_crop_out)
489 v4l2_rect_map_inside(crop, &r);
490 else
491 *crop = r;
492 if (dev->has_compose_out && !dev->has_crop_out) {
493 struct v4l2_rect min_r = {
494 0, 0,
495 r.width / MAX_ZOOM,
496 factor * r.height / MAX_ZOOM
497 };
498 struct v4l2_rect max_r = {
499 0, 0,
500 r.width * MAX_ZOOM,
501 factor * r.height * MAX_ZOOM
502 };
503
504 v4l2_rect_set_min_size(compose, &min_r);
505 v4l2_rect_set_max_size(compose, &max_r);
506 v4l2_rect_map_inside(compose, &dev->compose_bounds_out);
507 } else if (dev->has_compose_out) {
508 struct v4l2_rect min_r = {
509 0, 0,
510 crop->width / MAX_ZOOM,
511 factor * crop->height / MAX_ZOOM
512 };
513 struct v4l2_rect max_r = {
514 0, 0,
515 crop->width * MAX_ZOOM,
516 factor * crop->height * MAX_ZOOM
517 };
518
519 v4l2_rect_set_min_size(compose, &min_r);
520 v4l2_rect_set_max_size(compose, &max_r);
521 v4l2_rect_map_inside(compose, &dev->compose_bounds_out);
522 }
523 } else if (dev->has_compose_out && !dev->has_crop_out) {
524 v4l2_rect_set_size_to(crop, &r);
525 r.height *= factor;
526 v4l2_rect_set_size_to(compose, &r);
527 v4l2_rect_map_inside(compose, &dev->compose_bounds_out);
528 } else if (!dev->has_compose_out) {
529 v4l2_rect_map_inside(crop, &r);
530 r.height /= factor;
531 v4l2_rect_set_size_to(compose, &r);
532 } else {
533 r.height *= factor;
534 v4l2_rect_set_max_size(compose, &r);
535 v4l2_rect_map_inside(compose, &dev->compose_bounds_out);
536 crop->top *= factor;
537 crop->height *= factor;
538 v4l2_rect_set_size_to(crop, compose);
539 v4l2_rect_map_inside(crop, &r);
540 crop->top /= factor;
541 crop->height /= factor;
542 }
543 } else {
544 struct v4l2_rect r = { 0, 0, mp->width, mp->height };
545
546 v4l2_rect_set_size_to(crop, &r);
547 r.height /= factor;
548 v4l2_rect_set_size_to(compose, &r);
549 }
550
551 dev->fmt_out_rect.width = mp->width;
552 dev->fmt_out_rect.height = mp->height;
553 for (p = 0; p < mp->num_planes; p++)
554 dev->bytesperline_out[p] = mp->plane_fmt[p].bytesperline;
555 for (p = dev->fmt_out->buffers; p < dev->fmt_out->planes; p++)
556 dev->bytesperline_out[p] =
557 (dev->bytesperline_out[0] * dev->fmt_out->bit_depth[p]) /
558 dev->fmt_out->bit_depth[0];
559 dev->field_out = mp->field;
560 if (vivid_is_svid_out(dev))
561 dev->tv_field_out = mp->field;
562
563 set_colorspace:
564 dev->colorspace_out = mp->colorspace;
565 dev->xfer_func_out = mp->xfer_func;
566 dev->ycbcr_enc_out = mp->ycbcr_enc;
567 dev->quantization_out = mp->quantization;
568 if (dev->loop_video) {
569 vivid_send_source_change(dev, SVID);
570 vivid_send_source_change(dev, HDMI);
571 }
572 return 0;
573 }
574
575 int vidioc_g_fmt_vid_out_mplane(struct file *file, void *priv,
576 struct v4l2_format *f)
577 {
578 struct vivid_dev *dev = video_drvdata(file);
579
580 if (!dev->multiplanar)
581 return -ENOTTY;
582 return vivid_g_fmt_vid_out(file, priv, f);
583 }
584
585 int vidioc_try_fmt_vid_out_mplane(struct file *file, void *priv,
586 struct v4l2_format *f)
587 {
588 struct vivid_dev *dev = video_drvdata(file);
589
590 if (!dev->multiplanar)
591 return -ENOTTY;
592 return vivid_try_fmt_vid_out(file, priv, f);
593 }
594
595 int vidioc_s_fmt_vid_out_mplane(struct file *file, void *priv,
596 struct v4l2_format *f)
597 {
598 struct vivid_dev *dev = video_drvdata(file);
599
600 if (!dev->multiplanar)
601 return -ENOTTY;
602 return vivid_s_fmt_vid_out(file, priv, f);
603 }
604
605 int vidioc_g_fmt_vid_out(struct file *file, void *priv,
606 struct v4l2_format *f)
607 {
608 struct vivid_dev *dev = video_drvdata(file);
609
610 if (dev->multiplanar)
611 return -ENOTTY;
612 return fmt_sp2mp_func(file, priv, f, vivid_g_fmt_vid_out);
613 }
614
615 int vidioc_try_fmt_vid_out(struct file *file, void *priv,
616 struct v4l2_format *f)
617 {
618 struct vivid_dev *dev = video_drvdata(file);
619
620 if (dev->multiplanar)
621 return -ENOTTY;
622 return fmt_sp2mp_func(file, priv, f, vivid_try_fmt_vid_out);
623 }
624
625 int vidioc_s_fmt_vid_out(struct file *file, void *priv,
626 struct v4l2_format *f)
627 {
628 struct vivid_dev *dev = video_drvdata(file);
629
630 if (dev->multiplanar)
631 return -ENOTTY;
632 return fmt_sp2mp_func(file, priv, f, vivid_s_fmt_vid_out);
633 }
634
635 int vivid_vid_out_g_selection(struct file *file, void *priv,
636 struct v4l2_selection *sel)
637 {
638 struct vivid_dev *dev = video_drvdata(file);
639
640 if (!dev->has_crop_out && !dev->has_compose_out)
641 return -ENOTTY;
642 if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
643 return -EINVAL;
644
645 sel->r.left = sel->r.top = 0;
646 switch (sel->target) {
647 case V4L2_SEL_TGT_CROP:
648 if (!dev->has_crop_out)
649 return -EINVAL;
650 sel->r = dev->crop_out;
651 break;
652 case V4L2_SEL_TGT_CROP_DEFAULT:
653 if (!dev->has_crop_out)
654 return -EINVAL;
655 sel->r = dev->fmt_out_rect;
656 break;
657 case V4L2_SEL_TGT_CROP_BOUNDS:
658 if (!dev->has_crop_out)
659 return -EINVAL;
660 sel->r = vivid_max_rect;
661 break;
662 case V4L2_SEL_TGT_COMPOSE:
663 if (!dev->has_compose_out)
664 return -EINVAL;
665 sel->r = dev->compose_out;
666 break;
667 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
668 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
669 if (!dev->has_compose_out)
670 return -EINVAL;
671 sel->r = dev->sink_rect;
672 break;
673 default:
674 return -EINVAL;
675 }
676 return 0;
677 }
678
679 int vivid_vid_out_s_selection(struct file *file, void *fh, struct v4l2_selection *s)
680 {
681 struct vivid_dev *dev = video_drvdata(file);
682 struct v4l2_rect *crop = &dev->crop_out;
683 struct v4l2_rect *compose = &dev->compose_out;
684 unsigned factor = V4L2_FIELD_HAS_T_OR_B(dev->field_out) ? 2 : 1;
685 int ret;
686
687 if (!dev->has_crop_out && !dev->has_compose_out)
688 return -ENOTTY;
689 if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
690 return -EINVAL;
691
692 switch (s->target) {
693 case V4L2_SEL_TGT_CROP:
694 if (!dev->has_crop_out)
695 return -EINVAL;
696 ret = vivid_vid_adjust_sel(s->flags, &s->r);
697 if (ret)
698 return ret;
699 v4l2_rect_set_min_size(&s->r, &vivid_min_rect);
700 v4l2_rect_set_max_size(&s->r, &dev->fmt_out_rect);
701 if (dev->has_scaler_out) {
702 struct v4l2_rect max_rect = {
703 0, 0,
704 dev->sink_rect.width * MAX_ZOOM,
705 (dev->sink_rect.height / factor) * MAX_ZOOM
706 };
707
708 v4l2_rect_set_max_size(&s->r, &max_rect);
709 if (dev->has_compose_out) {
710 struct v4l2_rect min_rect = {
711 0, 0,
712 s->r.width / MAX_ZOOM,
713 (s->r.height * factor) / MAX_ZOOM
714 };
715 struct v4l2_rect max_rect = {
716 0, 0,
717 s->r.width * MAX_ZOOM,
718 (s->r.height * factor) * MAX_ZOOM
719 };
720
721 v4l2_rect_set_min_size(compose, &min_rect);
722 v4l2_rect_set_max_size(compose, &max_rect);
723 v4l2_rect_map_inside(compose, &dev->compose_bounds_out);
724 }
725 } else if (dev->has_compose_out) {
726 s->r.top *= factor;
727 s->r.height *= factor;
728 v4l2_rect_set_max_size(&s->r, &dev->sink_rect);
729 v4l2_rect_set_size_to(compose, &s->r);
730 v4l2_rect_map_inside(compose, &dev->compose_bounds_out);
731 s->r.top /= factor;
732 s->r.height /= factor;
733 } else {
734 v4l2_rect_set_size_to(&s->r, &dev->sink_rect);
735 s->r.height /= factor;
736 }
737 v4l2_rect_map_inside(&s->r, &dev->fmt_out_rect);
738 *crop = s->r;
739 break;
740 case V4L2_SEL_TGT_COMPOSE:
741 if (!dev->has_compose_out)
742 return -EINVAL;
743 ret = vivid_vid_adjust_sel(s->flags, &s->r);
744 if (ret)
745 return ret;
746 v4l2_rect_set_min_size(&s->r, &vivid_min_rect);
747 v4l2_rect_set_max_size(&s->r, &dev->sink_rect);
748 v4l2_rect_map_inside(&s->r, &dev->compose_bounds_out);
749 s->r.top /= factor;
750 s->r.height /= factor;
751 if (dev->has_scaler_out) {
752 struct v4l2_rect fmt = dev->fmt_out_rect;
753 struct v4l2_rect max_rect = {
754 0, 0,
755 s->r.width * MAX_ZOOM,
756 s->r.height * MAX_ZOOM
757 };
758 struct v4l2_rect min_rect = {
759 0, 0,
760 s->r.width / MAX_ZOOM,
761 s->r.height / MAX_ZOOM
762 };
763
764 v4l2_rect_set_min_size(&fmt, &min_rect);
765 if (!dev->has_crop_out)
766 v4l2_rect_set_max_size(&fmt, &max_rect);
767 if (!v4l2_rect_same_size(&dev->fmt_out_rect, &fmt) &&
768 vb2_is_busy(&dev->vb_vid_out_q))
769 return -EBUSY;
770 if (dev->has_crop_out) {
771 v4l2_rect_set_min_size(crop, &min_rect);
772 v4l2_rect_set_max_size(crop, &max_rect);
773 }
774 dev->fmt_out_rect = fmt;
775 } else if (dev->has_crop_out) {
776 struct v4l2_rect fmt = dev->fmt_out_rect;
777
778 v4l2_rect_set_min_size(&fmt, &s->r);
779 if (!v4l2_rect_same_size(&dev->fmt_out_rect, &fmt) &&
780 vb2_is_busy(&dev->vb_vid_out_q))
781 return -EBUSY;
782 dev->fmt_out_rect = fmt;
783 v4l2_rect_set_size_to(crop, &s->r);
784 v4l2_rect_map_inside(crop, &dev->fmt_out_rect);
785 } else {
786 if (!v4l2_rect_same_size(&s->r, &dev->fmt_out_rect) &&
787 vb2_is_busy(&dev->vb_vid_out_q))
788 return -EBUSY;
789 v4l2_rect_set_size_to(&dev->fmt_out_rect, &s->r);
790 v4l2_rect_set_size_to(crop, &s->r);
791 crop->height /= factor;
792 v4l2_rect_map_inside(crop, &dev->fmt_out_rect);
793 }
794 s->r.top *= factor;
795 s->r.height *= factor;
796 if (dev->bitmap_out && (compose->width != s->r.width ||
797 compose->height != s->r.height)) {
798 vfree(dev->bitmap_out);
799 dev->bitmap_out = NULL;
800 }
801 *compose = s->r;
802 break;
803 default:
804 return -EINVAL;
805 }
806
807 return 0;
808 }
809
810 int vivid_vid_out_g_pixelaspect(struct file *file, void *priv,
811 int type, struct v4l2_fract *f)
812 {
813 struct vivid_dev *dev = video_drvdata(file);
814
815 if (type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
816 return -EINVAL;
817
818 switch (vivid_get_pixel_aspect(dev)) {
819 case TPG_PIXEL_ASPECT_NTSC:
820 f->numerator = 11;
821 f->denominator = 10;
822 break;
823 case TPG_PIXEL_ASPECT_PAL:
824 f->numerator = 54;
825 f->denominator = 59;
826 break;
827 default:
828 break;
829 }
830 return 0;
831 }
832
833 int vidioc_g_fmt_vid_out_overlay(struct file *file, void *priv,
834 struct v4l2_format *f)
835 {
836 struct vivid_dev *dev = video_drvdata(file);
837 const struct v4l2_rect *compose = &dev->compose_out;
838 struct v4l2_window *win = &f->fmt.win;
839 unsigned clipcount = win->clipcount;
840
841 if (!dev->has_fb)
842 return -EINVAL;
843 win->w.top = dev->overlay_out_top;
844 win->w.left = dev->overlay_out_left;
845 win->w.width = compose->width;
846 win->w.height = compose->height;
847 win->clipcount = dev->clipcount_out;
848 win->field = V4L2_FIELD_ANY;
849 win->chromakey = dev->chromakey_out;
850 win->global_alpha = dev->global_alpha_out;
851 if (clipcount > dev->clipcount_out)
852 clipcount = dev->clipcount_out;
853 if (dev->bitmap_out == NULL)
854 win->bitmap = NULL;
855 else if (win->bitmap) {
856 if (copy_to_user(win->bitmap, dev->bitmap_out,
857 ((dev->compose_out.width + 7) / 8) * dev->compose_out.height))
858 return -EFAULT;
859 }
860 if (clipcount && win->clips)
861 memcpy(win->clips, dev->clips_out,
862 clipcount * sizeof(dev->clips_out[0]));
863 return 0;
864 }
865
866 int vidioc_try_fmt_vid_out_overlay(struct file *file, void *priv,
867 struct v4l2_format *f)
868 {
869 struct vivid_dev *dev = video_drvdata(file);
870 const struct v4l2_rect *compose = &dev->compose_out;
871 struct v4l2_window *win = &f->fmt.win;
872 int i, j;
873
874 if (!dev->has_fb)
875 return -EINVAL;
876 win->w.left = clamp_t(int, win->w.left,
877 -dev->display_width, dev->display_width);
878 win->w.top = clamp_t(int, win->w.top,
879 -dev->display_height, dev->display_height);
880 win->w.width = compose->width;
881 win->w.height = compose->height;
882 /*
883 * It makes no sense for an OSD to overlay only top or bottom fields,
884 * so always set this to ANY.
885 */
886 win->field = V4L2_FIELD_ANY;
887 if (win->clipcount && !win->clips)
888 win->clipcount = 0;
889 if (win->clipcount > MAX_CLIPS)
890 win->clipcount = MAX_CLIPS;
891 if (win->clipcount) {
892 memcpy(dev->try_clips_out, win->clips,
893 win->clipcount * sizeof(dev->clips_out[0]));
894 for (i = 0; i < win->clipcount; i++) {
895 struct v4l2_rect *r = &dev->try_clips_out[i].c;
896
897 r->top = clamp_t(s32, r->top, 0, dev->display_height - 1);
898 r->height = clamp_t(s32, r->height, 1, dev->display_height - r->top);
899 r->left = clamp_t(u32, r->left, 0, dev->display_width - 1);
900 r->width = clamp_t(u32, r->width, 1, dev->display_width - r->left);
901 }
902 /*
903 * Yeah, so sue me, it's an O(n^2) algorithm. But n is a small
904 * number and it's typically a one-time deal.
905 */
906 for (i = 0; i < win->clipcount - 1; i++) {
907 struct v4l2_rect *r1 = &dev->try_clips_out[i].c;
908
909 for (j = i + 1; j < win->clipcount; j++) {
910 struct v4l2_rect *r2 = &dev->try_clips_out[j].c;
911
912 if (v4l2_rect_overlap(r1, r2))
913 return -EINVAL;
914 }
915 }
916 memcpy(win->clips, dev->try_clips_out,
917 win->clipcount * sizeof(dev->clips_out[0]));
918 }
919 return 0;
920 }
921
922 int vidioc_s_fmt_vid_out_overlay(struct file *file, void *priv,
923 struct v4l2_format *f)
924 {
925 struct vivid_dev *dev = video_drvdata(file);
926 const struct v4l2_rect *compose = &dev->compose_out;
927 struct v4l2_window *win = &f->fmt.win;
928 int ret = vidioc_try_fmt_vid_out_overlay(file, priv, f);
929 unsigned bitmap_size = ((compose->width + 7) / 8) * compose->height;
930 unsigned clips_size = win->clipcount * sizeof(dev->clips_out[0]);
931 void *new_bitmap = NULL;
932
933 if (ret)
934 return ret;
935
936 if (win->bitmap) {
937 new_bitmap = vzalloc(bitmap_size);
938
939 if (!new_bitmap)
940 return -ENOMEM;
941 if (copy_from_user(new_bitmap, win->bitmap, bitmap_size)) {
942 vfree(new_bitmap);
943 return -EFAULT;
944 }
945 }
946
947 dev->overlay_out_top = win->w.top;
948 dev->overlay_out_left = win->w.left;
949 vfree(dev->bitmap_out);
950 dev->bitmap_out = new_bitmap;
951 dev->clipcount_out = win->clipcount;
952 if (dev->clipcount_out)
953 memcpy(dev->clips_out, dev->try_clips_out, clips_size);
954 dev->chromakey_out = win->chromakey;
955 dev->global_alpha_out = win->global_alpha;
956 return ret;
957 }
958
959 int vivid_vid_out_overlay(struct file *file, void *fh, unsigned i)
960 {
961 struct vivid_dev *dev = video_drvdata(file);
962
963 if (i && !dev->fmt_out->can_do_overlay) {
964 dprintk(dev, 1, "unsupported output format for output overlay\n");
965 return -EINVAL;
966 }
967
968 dev->overlay_out_enabled = i;
969 return 0;
970 }
971
972 int vivid_vid_out_g_fbuf(struct file *file, void *fh,
973 struct v4l2_framebuffer *a)
974 {
975 struct vivid_dev *dev = video_drvdata(file);
976
977 a->capability = V4L2_FBUF_CAP_EXTERNOVERLAY |
978 V4L2_FBUF_CAP_BITMAP_CLIPPING |
979 V4L2_FBUF_CAP_LIST_CLIPPING |
980 V4L2_FBUF_CAP_CHROMAKEY |
981 V4L2_FBUF_CAP_SRC_CHROMAKEY |
982 V4L2_FBUF_CAP_GLOBAL_ALPHA |
983 V4L2_FBUF_CAP_LOCAL_ALPHA |
984 V4L2_FBUF_CAP_LOCAL_INV_ALPHA;
985 a->flags = V4L2_FBUF_FLAG_OVERLAY | dev->fbuf_out_flags;
986 a->base = (void *)dev->video_pbase;
987 a->fmt.width = dev->display_width;
988 a->fmt.height = dev->display_height;
989 if (dev->fb_defined.green.length == 5)
990 a->fmt.pixelformat = V4L2_PIX_FMT_ARGB555;
991 else
992 a->fmt.pixelformat = V4L2_PIX_FMT_RGB565;
993 a->fmt.bytesperline = dev->display_byte_stride;
994 a->fmt.sizeimage = a->fmt.height * a->fmt.bytesperline;
995 a->fmt.field = V4L2_FIELD_NONE;
996 a->fmt.colorspace = V4L2_COLORSPACE_SRGB;
997 a->fmt.priv = 0;
998 return 0;
999 }
1000
1001 int vivid_vid_out_s_fbuf(struct file *file, void *fh,
1002 const struct v4l2_framebuffer *a)
1003 {
1004 struct vivid_dev *dev = video_drvdata(file);
1005 const unsigned chroma_flags = V4L2_FBUF_FLAG_CHROMAKEY |
1006 V4L2_FBUF_FLAG_SRC_CHROMAKEY;
1007 const unsigned alpha_flags = V4L2_FBUF_FLAG_GLOBAL_ALPHA |
1008 V4L2_FBUF_FLAG_LOCAL_ALPHA |
1009 V4L2_FBUF_FLAG_LOCAL_INV_ALPHA;
1010
1011
1012 if ((a->flags & chroma_flags) == chroma_flags)
1013 return -EINVAL;
1014 switch (a->flags & alpha_flags) {
1015 case 0:
1016 case V4L2_FBUF_FLAG_GLOBAL_ALPHA:
1017 case V4L2_FBUF_FLAG_LOCAL_ALPHA:
1018 case V4L2_FBUF_FLAG_LOCAL_INV_ALPHA:
1019 break;
1020 default:
1021 return -EINVAL;
1022 }
1023 dev->fbuf_out_flags &= ~(chroma_flags | alpha_flags);
1024 dev->fbuf_out_flags = a->flags & (chroma_flags | alpha_flags);
1025 return 0;
1026 }
1027
1028 static const struct v4l2_audioout vivid_audio_outputs[] = {
1029 { 0, "Line-Out 1" },
1030 { 1, "Line-Out 2" },
1031 };
1032
1033 int vidioc_enum_output(struct file *file, void *priv,
1034 struct v4l2_output *out)
1035 {
1036 struct vivid_dev *dev = video_drvdata(file);
1037
1038 if (out->index >= dev->num_outputs)
1039 return -EINVAL;
1040
1041 out->type = V4L2_OUTPUT_TYPE_ANALOG;
1042 switch (dev->output_type[out->index]) {
1043 case SVID:
1044 snprintf(out->name, sizeof(out->name), "S-Video %u",
1045 dev->output_name_counter[out->index]);
1046 out->std = V4L2_STD_ALL;
1047 if (dev->has_audio_outputs)
1048 out->audioset = (1 << ARRAY_SIZE(vivid_audio_outputs)) - 1;
1049 out->capabilities = V4L2_OUT_CAP_STD;
1050 break;
1051 case HDMI:
1052 snprintf(out->name, sizeof(out->name), "HDMI %u",
1053 dev->output_name_counter[out->index]);
1054 out->capabilities = V4L2_OUT_CAP_DV_TIMINGS;
1055 break;
1056 }
1057 return 0;
1058 }
1059
1060 int vidioc_g_output(struct file *file, void *priv, unsigned *o)
1061 {
1062 struct vivid_dev *dev = video_drvdata(file);
1063
1064 *o = dev->output;
1065 return 0;
1066 }
1067
1068 int vidioc_s_output(struct file *file, void *priv, unsigned o)
1069 {
1070 struct vivid_dev *dev = video_drvdata(file);
1071
1072 if (o >= dev->num_outputs)
1073 return -EINVAL;
1074
1075 if (o == dev->output)
1076 return 0;
1077
1078 if (vb2_is_busy(&dev->vb_vid_out_q) ||
1079 vb2_is_busy(&dev->vb_vbi_out_q) ||
1080 vb2_is_busy(&dev->vb_meta_out_q))
1081 return -EBUSY;
1082
1083 dev->output = o;
1084 dev->tv_audio_output = 0;
1085 if (dev->output_type[o] == SVID)
1086 dev->vid_out_dev.tvnorms = V4L2_STD_ALL;
1087 else
1088 dev->vid_out_dev.tvnorms = 0;
1089
1090 dev->vbi_out_dev.tvnorms = dev->vid_out_dev.tvnorms;
1091 dev->meta_out_dev.tvnorms = dev->vid_out_dev.tvnorms;
1092 vivid_update_format_out(dev);
1093
1094 v4l2_ctrl_activate(dev->ctrl_display_present, vivid_is_hdmi_out(dev));
1095 if (vivid_is_hdmi_out(dev))
1096 v4l2_ctrl_s_ctrl(dev->ctrl_display_present,
1097 dev->display_present[dev->output]);
1098
1099 return 0;
1100 }
1101
1102 int vidioc_enumaudout(struct file *file, void *fh, struct v4l2_audioout *vout)
1103 {
1104 if (vout->index >= ARRAY_SIZE(vivid_audio_outputs))
1105 return -EINVAL;
1106 *vout = vivid_audio_outputs[vout->index];
1107 return 0;
1108 }
1109
1110 int vidioc_g_audout(struct file *file, void *fh, struct v4l2_audioout *vout)
1111 {
1112 struct vivid_dev *dev = video_drvdata(file);
1113
1114 if (!vivid_is_svid_out(dev))
1115 return -EINVAL;
1116 *vout = vivid_audio_outputs[dev->tv_audio_output];
1117 return 0;
1118 }
1119
1120 int vidioc_s_audout(struct file *file, void *fh, const struct v4l2_audioout *vout)
1121 {
1122 struct vivid_dev *dev = video_drvdata(file);
1123
1124 if (!vivid_is_svid_out(dev))
1125 return -EINVAL;
1126 if (vout->index >= ARRAY_SIZE(vivid_audio_outputs))
1127 return -EINVAL;
1128 dev->tv_audio_output = vout->index;
1129 return 0;
1130 }
1131
1132 int vivid_vid_out_s_std(struct file *file, void *priv, v4l2_std_id id)
1133 {
1134 struct vivid_dev *dev = video_drvdata(file);
1135
1136 if (!vivid_is_svid_out(dev))
1137 return -ENODATA;
1138 if (dev->std_out == id)
1139 return 0;
1140 if (vb2_is_busy(&dev->vb_vid_out_q) || vb2_is_busy(&dev->vb_vbi_out_q))
1141 return -EBUSY;
1142 dev->std_out = id;
1143 vivid_update_format_out(dev);
1144 return 0;
1145 }
1146
1147 static bool valid_cvt_gtf_timings(struct v4l2_dv_timings *timings)
1148 {
1149 struct v4l2_bt_timings *bt = &timings->bt;
1150
1151 if ((bt->standards & (V4L2_DV_BT_STD_CVT | V4L2_DV_BT_STD_GTF)) &&
1152 v4l2_valid_dv_timings(timings, &vivid_dv_timings_cap, NULL, NULL))
1153 return true;
1154
1155 return false;
1156 }
1157
1158 int vivid_vid_out_s_dv_timings(struct file *file, void *_fh,
1159 struct v4l2_dv_timings *timings)
1160 {
1161 struct vivid_dev *dev = video_drvdata(file);
1162 if (!vivid_is_hdmi_out(dev))
1163 return -ENODATA;
1164 if (!v4l2_find_dv_timings_cap(timings, &vivid_dv_timings_cap,
1165 0, NULL, NULL) &&
1166 !valid_cvt_gtf_timings(timings))
1167 return -EINVAL;
1168 if (v4l2_match_dv_timings(timings, &dev->dv_timings_out, 0, true))
1169 return 0;
1170 if (vb2_is_busy(&dev->vb_vid_out_q))
1171 return -EBUSY;
1172 dev->dv_timings_out = *timings;
1173 vivid_update_format_out(dev);
1174 return 0;
1175 }
1176
1177 int vivid_vid_out_g_parm(struct file *file, void *priv,
1178 struct v4l2_streamparm *parm)
1179 {
1180 struct vivid_dev *dev = video_drvdata(file);
1181
1182 if (parm->type != (dev->multiplanar ?
1183 V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE :
1184 V4L2_BUF_TYPE_VIDEO_OUTPUT))
1185 return -EINVAL;
1186
1187 parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
1188 parm->parm.output.timeperframe = dev->timeperframe_vid_out;
1189 parm->parm.output.writebuffers = 1;
1190
1191 return 0;
1192 }
1193
1194 int vidioc_subscribe_event(struct v4l2_fh *fh,
1195 const struct v4l2_event_subscription *sub)
1196 {
1197 switch (sub->type) {
1198 case V4L2_EVENT_SOURCE_CHANGE:
1199 if (fh->vdev->vfl_dir == VFL_DIR_RX)
1200 return v4l2_src_change_event_subscribe(fh, sub);
1201 break;
1202 default:
1203 return v4l2_ctrl_subscribe_event(fh, sub);
1204 }
1205 return -EINVAL;
1206 }
Linux with added FPC-III support