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Merge tag 'please-pull-misc-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / drivers / media / platform / vivid / vivid-vid-out.c
1 /*
2 * vivid-vid-out.c - video output 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/sched.h>
23 #include <linux/videodev2.h>
24 #include <linux/v4l2-dv-timings.h>
25 #include <media/v4l2-common.h>
26 #include <media/v4l2-event.h>
27 #include <media/v4l2-dv-timings.h>
28 #include <media/v4l2-rect.h>
29
30 #include "vivid-core.h"
31 #include "vivid-vid-common.h"
32 #include "vivid-kthread-out.h"
33 #include "vivid-vid-out.h"
34
35 static int vid_out_queue_setup(struct vb2_queue *vq,
36 unsigned *nbuffers, unsigned *nplanes,
37 unsigned sizes[], void *alloc_ctxs[])
38 {
39 struct vivid_dev *dev = vb2_get_drv_priv(vq);
40 const struct vivid_fmt *vfmt = dev->fmt_out;
41 unsigned planes = vfmt->buffers;
42 unsigned h = dev->fmt_out_rect.height;
43 unsigned size = dev->bytesperline_out[0] * h;
44 unsigned p;
45
46 for (p = vfmt->buffers; p < vfmt->planes; p++)
47 size += dev->bytesperline_out[p] * h / vfmt->vdownsampling[p];
48
49 if (dev->field_out == V4L2_FIELD_ALTERNATE) {
50 /*
51 * You cannot use write() with FIELD_ALTERNATE since the field
52 * information (TOP/BOTTOM) cannot be passed to the kernel.
53 */
54 if (vb2_fileio_is_active(vq))
55 return -EINVAL;
56 }
57
58 if (dev->queue_setup_error) {
59 /*
60 * Error injection: test what happens if queue_setup() returns
61 * an error.
62 */
63 dev->queue_setup_error = false;
64 return -EINVAL;
65 }
66
67 if (*nplanes) {
68 /*
69 * Check if the number of requested planes match
70 * the number of planes in the current format. You can't mix that.
71 */
72 if (*nplanes != planes)
73 return -EINVAL;
74 if (sizes[0] < size)
75 return -EINVAL;
76 for (p = 1; p < planes; p++) {
77 if (sizes[p] < dev->bytesperline_out[p] * h)
78 return -EINVAL;
79 }
80 } else {
81 for (p = 0; p < planes; p++)
82 sizes[p] = p ? dev->bytesperline_out[p] * h : size;
83 }
84
85 if (vq->num_buffers + *nbuffers < 2)
86 *nbuffers = 2 - vq->num_buffers;
87
88 *nplanes = planes;
89
90 /*
91 * videobuf2-vmalloc allocator is context-less so no need to set
92 * alloc_ctxs array.
93 */
94
95 dprintk(dev, 1, "%s: count=%d\n", __func__, *nbuffers);
96 for (p = 0; p < planes; p++)
97 dprintk(dev, 1, "%s: size[%u]=%u\n", __func__, p, sizes[p]);
98 return 0;
99 }
100
101 static int vid_out_buf_prepare(struct vb2_buffer *vb)
102 {
103 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
104 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
105 unsigned long size;
106 unsigned planes;
107 unsigned p;
108
109 dprintk(dev, 1, "%s\n", __func__);
110
111 if (WARN_ON(NULL == dev->fmt_out))
112 return -EINVAL;
113
114 planes = dev->fmt_out->planes;
115
116 if (dev->buf_prepare_error) {
117 /*
118 * Error injection: test what happens if buf_prepare() returns
119 * an error.
120 */
121 dev->buf_prepare_error = false;
122 return -EINVAL;
123 }
124
125 if (dev->field_out != V4L2_FIELD_ALTERNATE)
126 vbuf->field = dev->field_out;
127 else if (vbuf->field != V4L2_FIELD_TOP &&
128 vbuf->field != V4L2_FIELD_BOTTOM)
129 return -EINVAL;
130
131 for (p = 0; p < planes; p++) {
132 size = dev->bytesperline_out[p] * dev->fmt_out_rect.height +
133 vb->planes[p].data_offset;
134
135 if (vb2_get_plane_payload(vb, p) < size) {
136 dprintk(dev, 1, "%s the payload is too small for plane %u (%lu < %lu)\n",
137 __func__, p, vb2_get_plane_payload(vb, p), size);
138 return -EINVAL;
139 }
140 }
141
142 return 0;
143 }
144
145 static void vid_out_buf_queue(struct vb2_buffer *vb)
146 {
147 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
148 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
149 struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);
150
151 dprintk(dev, 1, "%s\n", __func__);
152
153 spin_lock(&dev->slock);
154 list_add_tail(&buf->list, &dev->vid_out_active);
155 spin_unlock(&dev->slock);
156 }
157
158 static int vid_out_start_streaming(struct vb2_queue *vq, unsigned count)
159 {
160 struct vivid_dev *dev = vb2_get_drv_priv(vq);
161 int err;
162
163 if (vb2_is_streaming(&dev->vb_vid_cap_q))
164 dev->can_loop_video = vivid_vid_can_loop(dev);
165
166 if (dev->kthread_vid_out)
167 return 0;
168
169 dev->vid_out_seq_count = 0;
170 dprintk(dev, 1, "%s\n", __func__);
171 if (dev->start_streaming_error) {
172 dev->start_streaming_error = false;
173 err = -EINVAL;
174 } else {
175 err = vivid_start_generating_vid_out(dev, &dev->vid_out_streaming);
176 }
177 if (err) {
178 struct vivid_buffer *buf, *tmp;
179
180 list_for_each_entry_safe(buf, tmp, &dev->vid_out_active, list) {
181 list_del(&buf->list);
182 vb2_buffer_done(&buf->vb.vb2_buf,
183 VB2_BUF_STATE_QUEUED);
184 }
185 }
186 return err;
187 }
188
189 /* abort streaming and wait for last buffer */
190 static void vid_out_stop_streaming(struct vb2_queue *vq)
191 {
192 struct vivid_dev *dev = vb2_get_drv_priv(vq);
193
194 dprintk(dev, 1, "%s\n", __func__);
195 vivid_stop_generating_vid_out(dev, &dev->vid_out_streaming);
196 dev->can_loop_video = false;
197 }
198
199 const struct vb2_ops vivid_vid_out_qops = {
200 .queue_setup = vid_out_queue_setup,
201 .buf_prepare = vid_out_buf_prepare,
202 .buf_queue = vid_out_buf_queue,
203 .start_streaming = vid_out_start_streaming,
204 .stop_streaming = vid_out_stop_streaming,
205 .wait_prepare = vb2_ops_wait_prepare,
206 .wait_finish = vb2_ops_wait_finish,
207 };
208
209 /*
210 * Called whenever the format has to be reset which can occur when
211 * changing outputs, standard, timings, etc.
212 */
213 void vivid_update_format_out(struct vivid_dev *dev)
214 {
215 struct v4l2_bt_timings *bt = &dev->dv_timings_out.bt;
216 unsigned size, p;
217 u64 pixelclock;
218
219 switch (dev->output_type[dev->output]) {
220 case SVID:
221 default:
222 dev->field_out = dev->tv_field_out;
223 dev->sink_rect.width = 720;
224 if (dev->std_out & V4L2_STD_525_60) {
225 dev->sink_rect.height = 480;
226 dev->timeperframe_vid_out = (struct v4l2_fract) { 1001, 30000 };
227 dev->service_set_out = V4L2_SLICED_CAPTION_525;
228 } else {
229 dev->sink_rect.height = 576;
230 dev->timeperframe_vid_out = (struct v4l2_fract) { 1000, 25000 };
231 dev->service_set_out = V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
232 }
233 dev->colorspace_out = V4L2_COLORSPACE_SMPTE170M;
234 break;
235 case HDMI:
236 dev->sink_rect.width = bt->width;
237 dev->sink_rect.height = bt->height;
238 size = V4L2_DV_BT_FRAME_WIDTH(bt) * V4L2_DV_BT_FRAME_HEIGHT(bt);
239
240 if (can_reduce_fps(bt) && (bt->flags & V4L2_DV_FL_REDUCED_FPS))
241 pixelclock = div_u64(bt->pixelclock * 1000, 1001);
242 else
243 pixelclock = bt->pixelclock;
244
245 dev->timeperframe_vid_out = (struct v4l2_fract) {
246 size / 100, (u32)pixelclock / 100
247 };
248 if (bt->interlaced)
249 dev->field_out = V4L2_FIELD_ALTERNATE;
250 else
251 dev->field_out = V4L2_FIELD_NONE;
252 if (!dev->dvi_d_out && (bt->flags & V4L2_DV_FL_IS_CE_VIDEO)) {
253 if (bt->width == 720 && bt->height <= 576)
254 dev->colorspace_out = V4L2_COLORSPACE_SMPTE170M;
255 else
256 dev->colorspace_out = V4L2_COLORSPACE_REC709;
257 } else {
258 dev->colorspace_out = V4L2_COLORSPACE_SRGB;
259 }
260 break;
261 }
262 dev->xfer_func_out = V4L2_XFER_FUNC_DEFAULT;
263 dev->ycbcr_enc_out = V4L2_YCBCR_ENC_DEFAULT;
264 dev->quantization_out = V4L2_QUANTIZATION_DEFAULT;
265 dev->compose_out = dev->sink_rect;
266 dev->compose_bounds_out = dev->sink_rect;
267 dev->crop_out = dev->compose_out;
268 if (V4L2_FIELD_HAS_T_OR_B(dev->field_out))
269 dev->crop_out.height /= 2;
270 dev->fmt_out_rect = dev->crop_out;
271 for (p = 0; p < dev->fmt_out->planes; p++)
272 dev->bytesperline_out[p] =
273 (dev->sink_rect.width * dev->fmt_out->bit_depth[p]) / 8;
274 }
275
276 /* Map the field to something that is valid for the current output */
277 static enum v4l2_field vivid_field_out(struct vivid_dev *dev, enum v4l2_field field)
278 {
279 if (vivid_is_svid_out(dev)) {
280 switch (field) {
281 case V4L2_FIELD_INTERLACED_TB:
282 case V4L2_FIELD_INTERLACED_BT:
283 case V4L2_FIELD_SEQ_TB:
284 case V4L2_FIELD_SEQ_BT:
285 case V4L2_FIELD_ALTERNATE:
286 return field;
287 case V4L2_FIELD_INTERLACED:
288 default:
289 return V4L2_FIELD_INTERLACED;
290 }
291 }
292 if (vivid_is_hdmi_out(dev))
293 return dev->dv_timings_out.bt.interlaced ? V4L2_FIELD_ALTERNATE :
294 V4L2_FIELD_NONE;
295 return V4L2_FIELD_NONE;
296 }
297
298 static enum tpg_pixel_aspect vivid_get_pixel_aspect(const struct vivid_dev *dev)
299 {
300 if (vivid_is_svid_out(dev))
301 return (dev->std_out & V4L2_STD_525_60) ?
302 TPG_PIXEL_ASPECT_NTSC : TPG_PIXEL_ASPECT_PAL;
303
304 if (vivid_is_hdmi_out(dev) &&
305 dev->sink_rect.width == 720 && dev->sink_rect.height <= 576)
306 return dev->sink_rect.height == 480 ?
307 TPG_PIXEL_ASPECT_NTSC : TPG_PIXEL_ASPECT_PAL;
308
309 return TPG_PIXEL_ASPECT_SQUARE;
310 }
311
312 int vivid_g_fmt_vid_out(struct file *file, void *priv,
313 struct v4l2_format *f)
314 {
315 struct vivid_dev *dev = video_drvdata(file);
316 struct v4l2_pix_format_mplane *mp = &f->fmt.pix_mp;
317 const struct vivid_fmt *fmt = dev->fmt_out;
318 unsigned p;
319
320 mp->width = dev->fmt_out_rect.width;
321 mp->height = dev->fmt_out_rect.height;
322 mp->field = dev->field_out;
323 mp->pixelformat = fmt->fourcc;
324 mp->colorspace = dev->colorspace_out;
325 mp->xfer_func = dev->xfer_func_out;
326 mp->ycbcr_enc = dev->ycbcr_enc_out;
327 mp->quantization = dev->quantization_out;
328 mp->num_planes = fmt->buffers;
329 for (p = 0; p < mp->num_planes; p++) {
330 mp->plane_fmt[p].bytesperline = dev->bytesperline_out[p];
331 mp->plane_fmt[p].sizeimage =
332 mp->plane_fmt[p].bytesperline * mp->height;
333 }
334 for (p = fmt->buffers; p < fmt->planes; p++) {
335 unsigned stride = dev->bytesperline_out[p];
336
337 mp->plane_fmt[0].sizeimage +=
338 (stride * mp->height) / fmt->vdownsampling[p];
339 }
340 return 0;
341 }
342
343 int vivid_try_fmt_vid_out(struct file *file, void *priv,
344 struct v4l2_format *f)
345 {
346 struct vivid_dev *dev = video_drvdata(file);
347 struct v4l2_bt_timings *bt = &dev->dv_timings_out.bt;
348 struct v4l2_pix_format_mplane *mp = &f->fmt.pix_mp;
349 struct v4l2_plane_pix_format *pfmt = mp->plane_fmt;
350 const struct vivid_fmt *fmt;
351 unsigned bytesperline, max_bpl;
352 unsigned factor = 1;
353 unsigned w, h;
354 unsigned p;
355
356 fmt = vivid_get_format(dev, mp->pixelformat);
357 if (!fmt) {
358 dprintk(dev, 1, "Fourcc format (0x%08x) unknown.\n",
359 mp->pixelformat);
360 mp->pixelformat = V4L2_PIX_FMT_YUYV;
361 fmt = vivid_get_format(dev, mp->pixelformat);
362 }
363
364 mp->field = vivid_field_out(dev, mp->field);
365 if (vivid_is_svid_out(dev)) {
366 w = 720;
367 h = (dev->std_out & V4L2_STD_525_60) ? 480 : 576;
368 } else {
369 w = dev->sink_rect.width;
370 h = dev->sink_rect.height;
371 }
372 if (V4L2_FIELD_HAS_T_OR_B(mp->field))
373 factor = 2;
374 if (!dev->has_scaler_out && !dev->has_crop_out && !dev->has_compose_out) {
375 mp->width = w;
376 mp->height = h / factor;
377 } else {
378 struct v4l2_rect r = { 0, 0, mp->width, mp->height * factor };
379
380 v4l2_rect_set_min_size(&r, &vivid_min_rect);
381 v4l2_rect_set_max_size(&r, &vivid_max_rect);
382 if (dev->has_scaler_out && !dev->has_crop_out) {
383 struct v4l2_rect max_r = { 0, 0, MAX_ZOOM * w, MAX_ZOOM * h };
384
385 v4l2_rect_set_max_size(&r, &max_r);
386 } else if (!dev->has_scaler_out && dev->has_compose_out && !dev->has_crop_out) {
387 v4l2_rect_set_max_size(&r, &dev->sink_rect);
388 } else if (!dev->has_scaler_out && !dev->has_compose_out) {
389 v4l2_rect_set_min_size(&r, &dev->sink_rect);
390 }
391 mp->width = r.width;
392 mp->height = r.height / factor;
393 }
394
395 /* This driver supports custom bytesperline values */
396
397 /* Calculate the minimum supported bytesperline value */
398 bytesperline = (mp->width * fmt->bit_depth[0]) >> 3;
399 /* Calculate the maximum supported bytesperline value */
400 max_bpl = (MAX_ZOOM * MAX_WIDTH * fmt->bit_depth[0]) >> 3;
401 mp->num_planes = fmt->buffers;
402 for (p = 0; p < mp->num_planes; p++) {
403 if (pfmt[p].bytesperline > max_bpl)
404 pfmt[p].bytesperline = max_bpl;
405 if (pfmt[p].bytesperline < bytesperline)
406 pfmt[p].bytesperline = bytesperline;
407 pfmt[p].sizeimage = pfmt[p].bytesperline * mp->height;
408 memset(pfmt[p].reserved, 0, sizeof(pfmt[p].reserved));
409 }
410 for (p = fmt->buffers; p < fmt->planes; p++)
411 pfmt[0].sizeimage += (pfmt[0].bytesperline * fmt->bit_depth[p]) /
412 (fmt->bit_depth[0] * fmt->vdownsampling[p]);
413 mp->xfer_func = V4L2_XFER_FUNC_DEFAULT;
414 mp->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
415 mp->quantization = V4L2_QUANTIZATION_DEFAULT;
416 if (vivid_is_svid_out(dev)) {
417 mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
418 } else if (dev->dvi_d_out || !(bt->flags & V4L2_DV_FL_IS_CE_VIDEO)) {
419 mp->colorspace = V4L2_COLORSPACE_SRGB;
420 if (dev->dvi_d_out)
421 mp->quantization = V4L2_QUANTIZATION_LIM_RANGE;
422 } else if (bt->width == 720 && bt->height <= 576) {
423 mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
424 } else if (mp->colorspace != V4L2_COLORSPACE_SMPTE170M &&
425 mp->colorspace != V4L2_COLORSPACE_REC709 &&
426 mp->colorspace != V4L2_COLORSPACE_ADOBERGB &&
427 mp->colorspace != V4L2_COLORSPACE_BT2020 &&
428 mp->colorspace != V4L2_COLORSPACE_SRGB) {
429 mp->colorspace = V4L2_COLORSPACE_REC709;
430 }
431 memset(mp->reserved, 0, sizeof(mp->reserved));
432 return 0;
433 }
434
435 int vivid_s_fmt_vid_out(struct file *file, void *priv,
436 struct v4l2_format *f)
437 {
438 struct v4l2_pix_format_mplane *mp = &f->fmt.pix_mp;
439 struct vivid_dev *dev = video_drvdata(file);
440 struct v4l2_rect *crop = &dev->crop_out;
441 struct v4l2_rect *compose = &dev->compose_out;
442 struct vb2_queue *q = &dev->vb_vid_out_q;
443 int ret = vivid_try_fmt_vid_out(file, priv, f);
444 unsigned factor = 1;
445 unsigned p;
446
447 if (ret < 0)
448 return ret;
449
450 if (vb2_is_busy(q) &&
451 (vivid_is_svid_out(dev) ||
452 mp->width != dev->fmt_out_rect.width ||
453 mp->height != dev->fmt_out_rect.height ||
454 mp->pixelformat != dev->fmt_out->fourcc ||
455 mp->field != dev->field_out)) {
456 dprintk(dev, 1, "%s device busy\n", __func__);
457 return -EBUSY;
458 }
459
460 /*
461 * Allow for changing the colorspace on the fly. Useful for testing
462 * purposes, and it is something that HDMI transmitters are able
463 * to do.
464 */
465 if (vb2_is_busy(q))
466 goto set_colorspace;
467
468 dev->fmt_out = vivid_get_format(dev, mp->pixelformat);
469 if (V4L2_FIELD_HAS_T_OR_B(mp->field))
470 factor = 2;
471
472 if (dev->has_scaler_out || dev->has_crop_out || dev->has_compose_out) {
473 struct v4l2_rect r = { 0, 0, mp->width, mp->height };
474
475 if (dev->has_scaler_out) {
476 if (dev->has_crop_out)
477 v4l2_rect_map_inside(crop, &r);
478 else
479 *crop = r;
480 if (dev->has_compose_out && !dev->has_crop_out) {
481 struct v4l2_rect min_r = {
482 0, 0,
483 r.width / MAX_ZOOM,
484 factor * r.height / MAX_ZOOM
485 };
486 struct v4l2_rect max_r = {
487 0, 0,
488 r.width * MAX_ZOOM,
489 factor * r.height * MAX_ZOOM
490 };
491
492 v4l2_rect_set_min_size(compose, &min_r);
493 v4l2_rect_set_max_size(compose, &max_r);
494 v4l2_rect_map_inside(compose, &dev->compose_bounds_out);
495 } else if (dev->has_compose_out) {
496 struct v4l2_rect min_r = {
497 0, 0,
498 crop->width / MAX_ZOOM,
499 factor * crop->height / MAX_ZOOM
500 };
501 struct v4l2_rect max_r = {
502 0, 0,
503 crop->width * MAX_ZOOM,
504 factor * crop->height * MAX_ZOOM
505 };
506
507 v4l2_rect_set_min_size(compose, &min_r);
508 v4l2_rect_set_max_size(compose, &max_r);
509 v4l2_rect_map_inside(compose, &dev->compose_bounds_out);
510 }
511 } else if (dev->has_compose_out && !dev->has_crop_out) {
512 v4l2_rect_set_size_to(crop, &r);
513 r.height *= factor;
514 v4l2_rect_set_size_to(compose, &r);
515 v4l2_rect_map_inside(compose, &dev->compose_bounds_out);
516 } else if (!dev->has_compose_out) {
517 v4l2_rect_map_inside(crop, &r);
518 r.height /= factor;
519 v4l2_rect_set_size_to(compose, &r);
520 } else {
521 r.height *= factor;
522 v4l2_rect_set_max_size(compose, &r);
523 v4l2_rect_map_inside(compose, &dev->compose_bounds_out);
524 crop->top *= factor;
525 crop->height *= factor;
526 v4l2_rect_set_size_to(crop, compose);
527 v4l2_rect_map_inside(crop, &r);
528 crop->top /= factor;
529 crop->height /= factor;
530 }
531 } else {
532 struct v4l2_rect r = { 0, 0, mp->width, mp->height };
533
534 v4l2_rect_set_size_to(crop, &r);
535 r.height /= factor;
536 v4l2_rect_set_size_to(compose, &r);
537 }
538
539 dev->fmt_out_rect.width = mp->width;
540 dev->fmt_out_rect.height = mp->height;
541 for (p = 0; p < mp->num_planes; p++)
542 dev->bytesperline_out[p] = mp->plane_fmt[p].bytesperline;
543 for (p = dev->fmt_out->buffers; p < dev->fmt_out->planes; p++)
544 dev->bytesperline_out[p] =
545 (dev->bytesperline_out[0] * dev->fmt_out->bit_depth[p]) /
546 dev->fmt_out->bit_depth[0];
547 dev->field_out = mp->field;
548 if (vivid_is_svid_out(dev))
549 dev->tv_field_out = mp->field;
550
551 set_colorspace:
552 dev->colorspace_out = mp->colorspace;
553 dev->xfer_func_out = mp->xfer_func;
554 dev->ycbcr_enc_out = mp->ycbcr_enc;
555 dev->quantization_out = mp->quantization;
556 if (dev->loop_video) {
557 vivid_send_source_change(dev, SVID);
558 vivid_send_source_change(dev, HDMI);
559 }
560 return 0;
561 }
562
563 int vidioc_g_fmt_vid_out_mplane(struct file *file, void *priv,
564 struct v4l2_format *f)
565 {
566 struct vivid_dev *dev = video_drvdata(file);
567
568 if (!dev->multiplanar)
569 return -ENOTTY;
570 return vivid_g_fmt_vid_out(file, priv, f);
571 }
572
573 int vidioc_try_fmt_vid_out_mplane(struct file *file, void *priv,
574 struct v4l2_format *f)
575 {
576 struct vivid_dev *dev = video_drvdata(file);
577
578 if (!dev->multiplanar)
579 return -ENOTTY;
580 return vivid_try_fmt_vid_out(file, priv, f);
581 }
582
583 int vidioc_s_fmt_vid_out_mplane(struct file *file, void *priv,
584 struct v4l2_format *f)
585 {
586 struct vivid_dev *dev = video_drvdata(file);
587
588 if (!dev->multiplanar)
589 return -ENOTTY;
590 return vivid_s_fmt_vid_out(file, priv, f);
591 }
592
593 int vidioc_g_fmt_vid_out(struct file *file, void *priv,
594 struct v4l2_format *f)
595 {
596 struct vivid_dev *dev = video_drvdata(file);
597
598 if (dev->multiplanar)
599 return -ENOTTY;
600 return fmt_sp2mp_func(file, priv, f, vivid_g_fmt_vid_out);
601 }
602
603 int vidioc_try_fmt_vid_out(struct file *file, void *priv,
604 struct v4l2_format *f)
605 {
606 struct vivid_dev *dev = video_drvdata(file);
607
608 if (dev->multiplanar)
609 return -ENOTTY;
610 return fmt_sp2mp_func(file, priv, f, vivid_try_fmt_vid_out);
611 }
612
613 int vidioc_s_fmt_vid_out(struct file *file, void *priv,
614 struct v4l2_format *f)
615 {
616 struct vivid_dev *dev = video_drvdata(file);
617
618 if (dev->multiplanar)
619 return -ENOTTY;
620 return fmt_sp2mp_func(file, priv, f, vivid_s_fmt_vid_out);
621 }
622
623 int vivid_vid_out_g_selection(struct file *file, void *priv,
624 struct v4l2_selection *sel)
625 {
626 struct vivid_dev *dev = video_drvdata(file);
627
628 if (!dev->has_crop_out && !dev->has_compose_out)
629 return -ENOTTY;
630 if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
631 return -EINVAL;
632
633 sel->r.left = sel->r.top = 0;
634 switch (sel->target) {
635 case V4L2_SEL_TGT_CROP:
636 if (!dev->has_crop_out)
637 return -EINVAL;
638 sel->r = dev->crop_out;
639 break;
640 case V4L2_SEL_TGT_CROP_DEFAULT:
641 if (!dev->has_crop_out)
642 return -EINVAL;
643 sel->r = dev->fmt_out_rect;
644 break;
645 case V4L2_SEL_TGT_CROP_BOUNDS:
646 if (!dev->has_crop_out)
647 return -EINVAL;
648 sel->r = vivid_max_rect;
649 break;
650 case V4L2_SEL_TGT_COMPOSE:
651 if (!dev->has_compose_out)
652 return -EINVAL;
653 sel->r = dev->compose_out;
654 break;
655 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
656 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
657 if (!dev->has_compose_out)
658 return -EINVAL;
659 sel->r = dev->sink_rect;
660 break;
661 default:
662 return -EINVAL;
663 }
664 return 0;
665 }
666
667 int vivid_vid_out_s_selection(struct file *file, void *fh, struct v4l2_selection *s)
668 {
669 struct vivid_dev *dev = video_drvdata(file);
670 struct v4l2_rect *crop = &dev->crop_out;
671 struct v4l2_rect *compose = &dev->compose_out;
672 unsigned factor = V4L2_FIELD_HAS_T_OR_B(dev->field_out) ? 2 : 1;
673 int ret;
674
675 if (!dev->has_crop_out && !dev->has_compose_out)
676 return -ENOTTY;
677 if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
678 return -EINVAL;
679
680 switch (s->target) {
681 case V4L2_SEL_TGT_CROP:
682 if (!dev->has_crop_out)
683 return -EINVAL;
684 ret = vivid_vid_adjust_sel(s->flags, &s->r);
685 if (ret)
686 return ret;
687 v4l2_rect_set_min_size(&s->r, &vivid_min_rect);
688 v4l2_rect_set_max_size(&s->r, &dev->fmt_out_rect);
689 if (dev->has_scaler_out) {
690 struct v4l2_rect max_rect = {
691 0, 0,
692 dev->sink_rect.width * MAX_ZOOM,
693 (dev->sink_rect.height / factor) * MAX_ZOOM
694 };
695
696 v4l2_rect_set_max_size(&s->r, &max_rect);
697 if (dev->has_compose_out) {
698 struct v4l2_rect min_rect = {
699 0, 0,
700 s->r.width / MAX_ZOOM,
701 (s->r.height * factor) / MAX_ZOOM
702 };
703 struct v4l2_rect max_rect = {
704 0, 0,
705 s->r.width * MAX_ZOOM,
706 (s->r.height * factor) * MAX_ZOOM
707 };
708
709 v4l2_rect_set_min_size(compose, &min_rect);
710 v4l2_rect_set_max_size(compose, &max_rect);
711 v4l2_rect_map_inside(compose, &dev->compose_bounds_out);
712 }
713 } else if (dev->has_compose_out) {
714 s->r.top *= factor;
715 s->r.height *= factor;
716 v4l2_rect_set_max_size(&s->r, &dev->sink_rect);
717 v4l2_rect_set_size_to(compose, &s->r);
718 v4l2_rect_map_inside(compose, &dev->compose_bounds_out);
719 s->r.top /= factor;
720 s->r.height /= factor;
721 } else {
722 v4l2_rect_set_size_to(&s->r, &dev->sink_rect);
723 s->r.height /= factor;
724 }
725 v4l2_rect_map_inside(&s->r, &dev->fmt_out_rect);
726 *crop = s->r;
727 break;
728 case V4L2_SEL_TGT_COMPOSE:
729 if (!dev->has_compose_out)
730 return -EINVAL;
731 ret = vivid_vid_adjust_sel(s->flags, &s->r);
732 if (ret)
733 return ret;
734 v4l2_rect_set_min_size(&s->r, &vivid_min_rect);
735 v4l2_rect_set_max_size(&s->r, &dev->sink_rect);
736 v4l2_rect_map_inside(&s->r, &dev->compose_bounds_out);
737 s->r.top /= factor;
738 s->r.height /= factor;
739 if (dev->has_scaler_out) {
740 struct v4l2_rect fmt = dev->fmt_out_rect;
741 struct v4l2_rect max_rect = {
742 0, 0,
743 s->r.width * MAX_ZOOM,
744 s->r.height * MAX_ZOOM
745 };
746 struct v4l2_rect min_rect = {
747 0, 0,
748 s->r.width / MAX_ZOOM,
749 s->r.height / MAX_ZOOM
750 };
751
752 v4l2_rect_set_min_size(&fmt, &min_rect);
753 if (!dev->has_crop_out)
754 v4l2_rect_set_max_size(&fmt, &max_rect);
755 if (!v4l2_rect_same_size(&dev->fmt_out_rect, &fmt) &&
756 vb2_is_busy(&dev->vb_vid_out_q))
757 return -EBUSY;
758 if (dev->has_crop_out) {
759 v4l2_rect_set_min_size(crop, &min_rect);
760 v4l2_rect_set_max_size(crop, &max_rect);
761 }
762 dev->fmt_out_rect = fmt;
763 } else if (dev->has_crop_out) {
764 struct v4l2_rect fmt = dev->fmt_out_rect;
765
766 v4l2_rect_set_min_size(&fmt, &s->r);
767 if (!v4l2_rect_same_size(&dev->fmt_out_rect, &fmt) &&
768 vb2_is_busy(&dev->vb_vid_out_q))
769 return -EBUSY;
770 dev->fmt_out_rect = fmt;
771 v4l2_rect_set_size_to(crop, &s->r);
772 v4l2_rect_map_inside(crop, &dev->fmt_out_rect);
773 } else {
774 if (!v4l2_rect_same_size(&s->r, &dev->fmt_out_rect) &&
775 vb2_is_busy(&dev->vb_vid_out_q))
776 return -EBUSY;
777 v4l2_rect_set_size_to(&dev->fmt_out_rect, &s->r);
778 v4l2_rect_set_size_to(crop, &s->r);
779 crop->height /= factor;
780 v4l2_rect_map_inside(crop, &dev->fmt_out_rect);
781 }
782 s->r.top *= factor;
783 s->r.height *= factor;
784 if (dev->bitmap_out && (compose->width != s->r.width ||
785 compose->height != s->r.height)) {
786 kfree(dev->bitmap_out);
787 dev->bitmap_out = NULL;
788 }
789 *compose = s->r;
790 break;
791 default:
792 return -EINVAL;
793 }
794
795 return 0;
796 }
797
798 int vivid_vid_out_cropcap(struct file *file, void *priv,
799 struct v4l2_cropcap *cap)
800 {
801 struct vivid_dev *dev = video_drvdata(file);
802
803 if (cap->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
804 return -EINVAL;
805
806 switch (vivid_get_pixel_aspect(dev)) {
807 case TPG_PIXEL_ASPECT_NTSC:
808 cap->pixelaspect.numerator = 11;
809 cap->pixelaspect.denominator = 10;
810 break;
811 case TPG_PIXEL_ASPECT_PAL:
812 cap->pixelaspect.numerator = 54;
813 cap->pixelaspect.denominator = 59;
814 break;
815 case TPG_PIXEL_ASPECT_SQUARE:
816 cap->pixelaspect.numerator = 1;
817 cap->pixelaspect.denominator = 1;
818 break;
819 }
820 return 0;
821 }
822
823 int vidioc_g_fmt_vid_out_overlay(struct file *file, void *priv,
824 struct v4l2_format *f)
825 {
826 struct vivid_dev *dev = video_drvdata(file);
827 const struct v4l2_rect *compose = &dev->compose_out;
828 struct v4l2_window *win = &f->fmt.win;
829 unsigned clipcount = win->clipcount;
830
831 if (!dev->has_fb)
832 return -EINVAL;
833 win->w.top = dev->overlay_out_top;
834 win->w.left = dev->overlay_out_left;
835 win->w.width = compose->width;
836 win->w.height = compose->height;
837 win->clipcount = dev->clipcount_out;
838 win->field = V4L2_FIELD_ANY;
839 win->chromakey = dev->chromakey_out;
840 win->global_alpha = dev->global_alpha_out;
841 if (clipcount > dev->clipcount_out)
842 clipcount = dev->clipcount_out;
843 if (dev->bitmap_out == NULL)
844 win->bitmap = NULL;
845 else if (win->bitmap) {
846 if (copy_to_user(win->bitmap, dev->bitmap_out,
847 ((dev->compose_out.width + 7) / 8) * dev->compose_out.height))
848 return -EFAULT;
849 }
850 if (clipcount && win->clips) {
851 if (copy_to_user(win->clips, dev->clips_out,
852 clipcount * sizeof(dev->clips_out[0])))
853 return -EFAULT;
854 }
855 return 0;
856 }
857
858 int vidioc_try_fmt_vid_out_overlay(struct file *file, void *priv,
859 struct v4l2_format *f)
860 {
861 struct vivid_dev *dev = video_drvdata(file);
862 const struct v4l2_rect *compose = &dev->compose_out;
863 struct v4l2_window *win = &f->fmt.win;
864 int i, j;
865
866 if (!dev->has_fb)
867 return -EINVAL;
868 win->w.left = clamp_t(int, win->w.left,
869 -dev->display_width, dev->display_width);
870 win->w.top = clamp_t(int, win->w.top,
871 -dev->display_height, dev->display_height);
872 win->w.width = compose->width;
873 win->w.height = compose->height;
874 /*
875 * It makes no sense for an OSD to overlay only top or bottom fields,
876 * so always set this to ANY.
877 */
878 win->field = V4L2_FIELD_ANY;
879 if (win->clipcount && !win->clips)
880 win->clipcount = 0;
881 if (win->clipcount > MAX_CLIPS)
882 win->clipcount = MAX_CLIPS;
883 if (win->clipcount) {
884 if (copy_from_user(dev->try_clips_out, win->clips,
885 win->clipcount * sizeof(dev->clips_out[0])))
886 return -EFAULT;
887 for (i = 0; i < win->clipcount; i++) {
888 struct v4l2_rect *r = &dev->try_clips_out[i].c;
889
890 r->top = clamp_t(s32, r->top, 0, dev->display_height - 1);
891 r->height = clamp_t(s32, r->height, 1, dev->display_height - r->top);
892 r->left = clamp_t(u32, r->left, 0, dev->display_width - 1);
893 r->width = clamp_t(u32, r->width, 1, dev->display_width - r->left);
894 }
895 /*
896 * Yeah, so sue me, it's an O(n^2) algorithm. But n is a small
897 * number and it's typically a one-time deal.
898 */
899 for (i = 0; i < win->clipcount - 1; i++) {
900 struct v4l2_rect *r1 = &dev->try_clips_out[i].c;
901
902 for (j = i + 1; j < win->clipcount; j++) {
903 struct v4l2_rect *r2 = &dev->try_clips_out[j].c;
904
905 if (v4l2_rect_overlap(r1, r2))
906 return -EINVAL;
907 }
908 }
909 if (copy_to_user(win->clips, dev->try_clips_out,
910 win->clipcount * sizeof(dev->clips_out[0])))
911 return -EFAULT;
912 }
913 return 0;
914 }
915
916 int vidioc_s_fmt_vid_out_overlay(struct file *file, void *priv,
917 struct v4l2_format *f)
918 {
919 struct vivid_dev *dev = video_drvdata(file);
920 const struct v4l2_rect *compose = &dev->compose_out;
921 struct v4l2_window *win = &f->fmt.win;
922 int ret = vidioc_try_fmt_vid_out_overlay(file, priv, f);
923 unsigned bitmap_size = ((compose->width + 7) / 8) * compose->height;
924 unsigned clips_size = win->clipcount * sizeof(dev->clips_out[0]);
925 void *new_bitmap = NULL;
926
927 if (ret)
928 return ret;
929
930 if (win->bitmap) {
931 new_bitmap = memdup_user(win->bitmap, bitmap_size);
932
933 if (IS_ERR(new_bitmap))
934 return PTR_ERR(new_bitmap);
935 }
936
937 dev->overlay_out_top = win->w.top;
938 dev->overlay_out_left = win->w.left;
939 kfree(dev->bitmap_out);
940 dev->bitmap_out = new_bitmap;
941 dev->clipcount_out = win->clipcount;
942 if (dev->clipcount_out)
943 memcpy(dev->clips_out, dev->try_clips_out, clips_size);
944 dev->chromakey_out = win->chromakey;
945 dev->global_alpha_out = win->global_alpha;
946 return ret;
947 }
948
949 int vivid_vid_out_overlay(struct file *file, void *fh, unsigned i)
950 {
951 struct vivid_dev *dev = video_drvdata(file);
952
953 if (i && !dev->fmt_out->can_do_overlay) {
954 dprintk(dev, 1, "unsupported output format for output overlay\n");
955 return -EINVAL;
956 }
957
958 dev->overlay_out_enabled = i;
959 return 0;
960 }
961
962 int vivid_vid_out_g_fbuf(struct file *file, void *fh,
963 struct v4l2_framebuffer *a)
964 {
965 struct vivid_dev *dev = video_drvdata(file);
966
967 a->capability = V4L2_FBUF_CAP_EXTERNOVERLAY |
968 V4L2_FBUF_CAP_BITMAP_CLIPPING |
969 V4L2_FBUF_CAP_LIST_CLIPPING |
970 V4L2_FBUF_CAP_CHROMAKEY |
971 V4L2_FBUF_CAP_SRC_CHROMAKEY |
972 V4L2_FBUF_CAP_GLOBAL_ALPHA |
973 V4L2_FBUF_CAP_LOCAL_ALPHA |
974 V4L2_FBUF_CAP_LOCAL_INV_ALPHA;
975 a->flags = V4L2_FBUF_FLAG_OVERLAY | dev->fbuf_out_flags;
976 a->base = (void *)dev->video_pbase;
977 a->fmt.width = dev->display_width;
978 a->fmt.height = dev->display_height;
979 if (dev->fb_defined.green.length == 5)
980 a->fmt.pixelformat = V4L2_PIX_FMT_ARGB555;
981 else
982 a->fmt.pixelformat = V4L2_PIX_FMT_RGB565;
983 a->fmt.bytesperline = dev->display_byte_stride;
984 a->fmt.sizeimage = a->fmt.height * a->fmt.bytesperline;
985 a->fmt.field = V4L2_FIELD_NONE;
986 a->fmt.colorspace = V4L2_COLORSPACE_SRGB;
987 a->fmt.priv = 0;
988 return 0;
989 }
990
991 int vivid_vid_out_s_fbuf(struct file *file, void *fh,
992 const struct v4l2_framebuffer *a)
993 {
994 struct vivid_dev *dev = video_drvdata(file);
995 const unsigned chroma_flags = V4L2_FBUF_FLAG_CHROMAKEY |
996 V4L2_FBUF_FLAG_SRC_CHROMAKEY;
997 const unsigned alpha_flags = V4L2_FBUF_FLAG_GLOBAL_ALPHA |
998 V4L2_FBUF_FLAG_LOCAL_ALPHA |
999 V4L2_FBUF_FLAG_LOCAL_INV_ALPHA;
1000
1001
1002 if ((a->flags & chroma_flags) == chroma_flags)
1003 return -EINVAL;
1004 switch (a->flags & alpha_flags) {
1005 case 0:
1006 case V4L2_FBUF_FLAG_GLOBAL_ALPHA:
1007 case V4L2_FBUF_FLAG_LOCAL_ALPHA:
1008 case V4L2_FBUF_FLAG_LOCAL_INV_ALPHA:
1009 break;
1010 default:
1011 return -EINVAL;
1012 }
1013 dev->fbuf_out_flags &= ~(chroma_flags | alpha_flags);
1014 dev->fbuf_out_flags = a->flags & (chroma_flags | alpha_flags);
1015 return 0;
1016 }
1017
1018 static const struct v4l2_audioout vivid_audio_outputs[] = {
1019 { 0, "Line-Out 1" },
1020 { 1, "Line-Out 2" },
1021 };
1022
1023 int vidioc_enum_output(struct file *file, void *priv,
1024 struct v4l2_output *out)
1025 {
1026 struct vivid_dev *dev = video_drvdata(file);
1027
1028 if (out->index >= dev->num_outputs)
1029 return -EINVAL;
1030
1031 out->type = V4L2_OUTPUT_TYPE_ANALOG;
1032 switch (dev->output_type[out->index]) {
1033 case SVID:
1034 snprintf(out->name, sizeof(out->name), "S-Video %u",
1035 dev->output_name_counter[out->index]);
1036 out->std = V4L2_STD_ALL;
1037 if (dev->has_audio_outputs)
1038 out->audioset = (1 << ARRAY_SIZE(vivid_audio_outputs)) - 1;
1039 out->capabilities = V4L2_OUT_CAP_STD;
1040 break;
1041 case HDMI:
1042 snprintf(out->name, sizeof(out->name), "HDMI %u",
1043 dev->output_name_counter[out->index]);
1044 out->capabilities = V4L2_OUT_CAP_DV_TIMINGS;
1045 break;
1046 }
1047 return 0;
1048 }
1049
1050 int vidioc_g_output(struct file *file, void *priv, unsigned *o)
1051 {
1052 struct vivid_dev *dev = video_drvdata(file);
1053
1054 *o = dev->output;
1055 return 0;
1056 }
1057
1058 int vidioc_s_output(struct file *file, void *priv, unsigned o)
1059 {
1060 struct vivid_dev *dev = video_drvdata(file);
1061
1062 if (o >= dev->num_outputs)
1063 return -EINVAL;
1064
1065 if (o == dev->output)
1066 return 0;
1067
1068 if (vb2_is_busy(&dev->vb_vid_out_q) || vb2_is_busy(&dev->vb_vbi_out_q))
1069 return -EBUSY;
1070
1071 dev->output = o;
1072 dev->tv_audio_output = 0;
1073 if (dev->output_type[o] == SVID)
1074 dev->vid_out_dev.tvnorms = V4L2_STD_ALL;
1075 else
1076 dev->vid_out_dev.tvnorms = 0;
1077
1078 dev->vbi_out_dev.tvnorms = dev->vid_out_dev.tvnorms;
1079 vivid_update_format_out(dev);
1080 return 0;
1081 }
1082
1083 int vidioc_enumaudout(struct file *file, void *fh, struct v4l2_audioout *vout)
1084 {
1085 if (vout->index >= ARRAY_SIZE(vivid_audio_outputs))
1086 return -EINVAL;
1087 *vout = vivid_audio_outputs[vout->index];
1088 return 0;
1089 }
1090
1091 int vidioc_g_audout(struct file *file, void *fh, struct v4l2_audioout *vout)
1092 {
1093 struct vivid_dev *dev = video_drvdata(file);
1094
1095 if (!vivid_is_svid_out(dev))
1096 return -EINVAL;
1097 *vout = vivid_audio_outputs[dev->tv_audio_output];
1098 return 0;
1099 }
1100
1101 int vidioc_s_audout(struct file *file, void *fh, const struct v4l2_audioout *vout)
1102 {
1103 struct vivid_dev *dev = video_drvdata(file);
1104
1105 if (!vivid_is_svid_out(dev))
1106 return -EINVAL;
1107 if (vout->index >= ARRAY_SIZE(vivid_audio_outputs))
1108 return -EINVAL;
1109 dev->tv_audio_output = vout->index;
1110 return 0;
1111 }
1112
1113 int vivid_vid_out_s_std(struct file *file, void *priv, v4l2_std_id id)
1114 {
1115 struct vivid_dev *dev = video_drvdata(file);
1116
1117 if (!vivid_is_svid_out(dev))
1118 return -ENODATA;
1119 if (dev->std_out == id)
1120 return 0;
1121 if (vb2_is_busy(&dev->vb_vid_out_q) || vb2_is_busy(&dev->vb_vbi_out_q))
1122 return -EBUSY;
1123 dev->std_out = id;
1124 vivid_update_format_out(dev);
1125 return 0;
1126 }
1127
1128 static bool valid_cvt_gtf_timings(struct v4l2_dv_timings *timings)
1129 {
1130 struct v4l2_bt_timings *bt = &timings->bt;
1131
1132 if ((bt->standards & (V4L2_DV_BT_STD_CVT | V4L2_DV_BT_STD_GTF)) &&
1133 v4l2_valid_dv_timings(timings, &vivid_dv_timings_cap, NULL, NULL))
1134 return true;
1135
1136 return false;
1137 }
1138
1139 int vivid_vid_out_s_dv_timings(struct file *file, void *_fh,
1140 struct v4l2_dv_timings *timings)
1141 {
1142 struct vivid_dev *dev = video_drvdata(file);
1143 if (!vivid_is_hdmi_out(dev))
1144 return -ENODATA;
1145 if (!v4l2_find_dv_timings_cap(timings, &vivid_dv_timings_cap,
1146 0, NULL, NULL) &&
1147 !valid_cvt_gtf_timings(timings))
1148 return -EINVAL;
1149 if (v4l2_match_dv_timings(timings, &dev->dv_timings_out, 0, true))
1150 return 0;
1151 if (vb2_is_busy(&dev->vb_vid_out_q))
1152 return -EBUSY;
1153 dev->dv_timings_out = *timings;
1154 vivid_update_format_out(dev);
1155 return 0;
1156 }
1157
1158 int vivid_vid_out_g_parm(struct file *file, void *priv,
1159 struct v4l2_streamparm *parm)
1160 {
1161 struct vivid_dev *dev = video_drvdata(file);
1162
1163 if (parm->type != (dev->multiplanar ?
1164 V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE :
1165 V4L2_BUF_TYPE_VIDEO_OUTPUT))
1166 return -EINVAL;
1167
1168 parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
1169 parm->parm.output.timeperframe = dev->timeperframe_vid_out;
1170 parm->parm.output.writebuffers = 1;
1171
1172 return 0;
1173 }
1174
1175 int vidioc_subscribe_event(struct v4l2_fh *fh,
1176 const struct v4l2_event_subscription *sub)
1177 {
1178 switch (sub->type) {
1179 case V4L2_EVENT_CTRL:
1180 return v4l2_ctrl_subscribe_event(fh, sub);
1181 case V4L2_EVENT_SOURCE_CHANGE:
1182 if (fh->vdev->vfl_dir == VFL_DIR_RX)
1183 return v4l2_src_change_event_subscribe(fh, sub);
1184 break;
1185 default:
1186 break;
1187 }
1188 return -EINVAL;
1189 }
Linux kernel - Deliverables
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