1 /*
2 * vivid-vid-common.c - common video 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
29 #include "vivid-core.h"
30 #include "vivid-vid-common.h"
31
32 const struct v4l2_dv_timings_cap vivid_dv_timings_cap = {
33 .type = V4L2_DV_BT_656_1120,
34 /* keep this initialization for compatibility with GCC < 4.4.6 */
35 .reserved = { 0 },
36 V4L2_INIT_BT_TIMINGS(0, MAX_WIDTH, 0, MAX_HEIGHT, 25000000, 600000000,
37 V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT,
38 V4L2_DV_BT_CAP_PROGRESSIVE | V4L2_DV_BT_CAP_INTERLACED)
39 };
40
41 /* ------------------------------------------------------------------
42 Basic structures
43 ------------------------------------------------------------------*/
44
45 struct vivid_fmt vivid_formats[] = {
46 {
47 .name = "4:2:2, packed, YUYV",
48 .fourcc = V4L2_PIX_FMT_YUYV,
49 .depth = 16,
50 .is_yuv = true,
51 .planes = 1,
52 .data_offset = { PLANE0_DATA_OFFSET, 0 },
53 },
54 {
55 .name = "4:2:2, packed, UYVY",
56 .fourcc = V4L2_PIX_FMT_UYVY,
57 .depth = 16,
58 .is_yuv = true,
59 .planes = 1,
60 },
61 {
62 .name = "4:2:2, packed, YVYU",
63 .fourcc = V4L2_PIX_FMT_YVYU,
64 .depth = 16,
65 .is_yuv = true,
66 .planes = 1,
67 },
68 {
69 .name = "4:2:2, packed, VYUY",
70 .fourcc = V4L2_PIX_FMT_VYUY,
71 .depth = 16,
72 .is_yuv = true,
73 .planes = 1,
74 },
75 {
76 .name = "RGB565 (LE)",
77 .fourcc = V4L2_PIX_FMT_RGB565, /* gggbbbbb rrrrrggg */
78 .depth = 16,
79 .planes = 1,
80 .can_do_overlay = true,
81 },
82 {
83 .name = "RGB565 (BE)",
84 .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */
85 .depth = 16,
86 .planes = 1,
87 .can_do_overlay = true,
88 },
89 {
90 .name = "RGB555 (LE)",
91 .fourcc = V4L2_PIX_FMT_RGB555, /* gggbbbbb arrrrrgg */
92 .depth = 16,
93 .planes = 1,
94 .can_do_overlay = true,
95 },
96 {
97 .name = "XRGB555 (LE)",
98 .fourcc = V4L2_PIX_FMT_XRGB555, /* gggbbbbb arrrrrgg */
99 .depth = 16,
100 .planes = 1,
101 .can_do_overlay = true,
102 },
103 {
104 .name = "ARGB555 (LE)",
105 .fourcc = V4L2_PIX_FMT_ARGB555, /* gggbbbbb arrrrrgg */
106 .depth = 16,
107 .planes = 1,
108 .can_do_overlay = true,
109 .alpha_mask = 0x8000,
110 },
111 {
112 .name = "RGB555 (BE)",
113 .fourcc = V4L2_PIX_FMT_RGB555X, /* arrrrrgg gggbbbbb */
114 .depth = 16,
115 .planes = 1,
116 .can_do_overlay = true,
117 },
118 {
119 .name = "RGB24 (LE)",
120 .fourcc = V4L2_PIX_FMT_RGB24, /* rgb */
121 .depth = 24,
122 .planes = 1,
123 },
124 {
125 .name = "RGB24 (BE)",
126 .fourcc = V4L2_PIX_FMT_BGR24, /* bgr */
127 .depth = 24,
128 .planes = 1,
129 },
130 {
131 .name = "RGB32 (LE)",
132 .fourcc = V4L2_PIX_FMT_RGB32, /* argb */
133 .depth = 32,
134 .planes = 1,
135 },
136 {
137 .name = "RGB32 (BE)",
138 .fourcc = V4L2_PIX_FMT_BGR32, /* bgra */
139 .depth = 32,
140 .planes = 1,
141 },
142 {
143 .name = "XRGB32 (LE)",
144 .fourcc = V4L2_PIX_FMT_XRGB32, /* argb */
145 .depth = 32,
146 .planes = 1,
147 },
148 {
149 .name = "XRGB32 (BE)",
150 .fourcc = V4L2_PIX_FMT_XBGR32, /* bgra */
151 .depth = 32,
152 .planes = 1,
153 },
154 {
155 .name = "ARGB32 (LE)",
156 .fourcc = V4L2_PIX_FMT_ARGB32, /* argb */
157 .depth = 32,
158 .planes = 1,
159 .alpha_mask = 0x000000ff,
160 },
161 {
162 .name = "ARGB32 (BE)",
163 .fourcc = V4L2_PIX_FMT_ABGR32, /* bgra */
164 .depth = 32,
165 .planes = 1,
166 .alpha_mask = 0xff000000,
167 },
168 {
169 .name = "4:2:2, planar, YUV",
170 .fourcc = V4L2_PIX_FMT_NV16M,
171 .depth = 8,
172 .is_yuv = true,
173 .planes = 2,
174 .data_offset = { PLANE0_DATA_OFFSET, 0 },
175 },
176 {
177 .name = "4:2:2, planar, YVU",
178 .fourcc = V4L2_PIX_FMT_NV61M,
179 .depth = 8,
180 .is_yuv = true,
181 .planes = 2,
182 .data_offset = { 0, PLANE0_DATA_OFFSET },
183 },
184 };
185
186 /* There are 2 multiplanar formats in the list */
187 #define VIVID_MPLANAR_FORMATS 2
188
vivid_get_format(struct vivid_dev * dev,u32 pixelformat)189 const struct vivid_fmt *vivid_get_format(struct vivid_dev *dev, u32 pixelformat)
190 {
191 const struct vivid_fmt *fmt;
192 unsigned k;
193
194 for (k = 0; k < ARRAY_SIZE(vivid_formats); k++) {
195 fmt = &vivid_formats[k];
196 if (fmt->fourcc == pixelformat)
197 if (fmt->planes == 1 || dev->multiplanar)
198 return fmt;
199 }
200
201 return NULL;
202 }
203
vivid_vid_can_loop(struct vivid_dev * dev)204 bool vivid_vid_can_loop(struct vivid_dev *dev)
205 {
206 if (dev->src_rect.width != dev->sink_rect.width ||
207 dev->src_rect.height != dev->sink_rect.height)
208 return false;
209 if (dev->fmt_cap->fourcc != dev->fmt_out->fourcc)
210 return false;
211 if (dev->field_cap != dev->field_out)
212 return false;
213 if (vivid_is_svid_cap(dev) && vivid_is_svid_out(dev)) {
214 if (!(dev->std_cap & V4L2_STD_525_60) !=
215 !(dev->std_out & V4L2_STD_525_60))
216 return false;
217 return true;
218 }
219 if (vivid_is_hdmi_cap(dev) && vivid_is_hdmi_out(dev))
220 return true;
221 return false;
222 }
223
vivid_send_source_change(struct vivid_dev * dev,unsigned type)224 void vivid_send_source_change(struct vivid_dev *dev, unsigned type)
225 {
226 struct v4l2_event ev = {
227 .type = V4L2_EVENT_SOURCE_CHANGE,
228 .u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
229 };
230 unsigned i;
231
232 for (i = 0; i < dev->num_inputs; i++) {
233 ev.id = i;
234 if (dev->input_type[i] == type) {
235 if (video_is_registered(&dev->vid_cap_dev) && dev->has_vid_cap)
236 v4l2_event_queue(&dev->vid_cap_dev, &ev);
237 if (video_is_registered(&dev->vbi_cap_dev) && dev->has_vbi_cap)
238 v4l2_event_queue(&dev->vbi_cap_dev, &ev);
239 }
240 }
241 }
242
243 /*
244 * Conversion function that converts a single-planar format to a
245 * single-plane multiplanar format.
246 */
fmt_sp2mp(const struct v4l2_format * sp_fmt,struct v4l2_format * mp_fmt)247 void fmt_sp2mp(const struct v4l2_format *sp_fmt, struct v4l2_format *mp_fmt)
248 {
249 struct v4l2_pix_format_mplane *mp = &mp_fmt->fmt.pix_mp;
250 struct v4l2_plane_pix_format *ppix = &mp->plane_fmt[0];
251 const struct v4l2_pix_format *pix = &sp_fmt->fmt.pix;
252 bool is_out = sp_fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT;
253
254 memset(mp->reserved, 0, sizeof(mp->reserved));
255 mp_fmt->type = is_out ? V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE :
256 V4L2_CAP_VIDEO_CAPTURE_MPLANE;
257 mp->width = pix->width;
258 mp->height = pix->height;
259 mp->pixelformat = pix->pixelformat;
260 mp->field = pix->field;
261 mp->colorspace = pix->colorspace;
262 mp->num_planes = 1;
263 mp->flags = pix->flags;
264 ppix->sizeimage = pix->sizeimage;
265 ppix->bytesperline = pix->bytesperline;
266 memset(ppix->reserved, 0, sizeof(ppix->reserved));
267 }
268
fmt_sp2mp_func(struct file * file,void * priv,struct v4l2_format * f,fmtfunc func)269 int fmt_sp2mp_func(struct file *file, void *priv,
270 struct v4l2_format *f, fmtfunc func)
271 {
272 struct v4l2_format fmt;
273 struct v4l2_pix_format_mplane *mp = &fmt.fmt.pix_mp;
274 struct v4l2_plane_pix_format *ppix = &mp->plane_fmt[0];
275 struct v4l2_pix_format *pix = &f->fmt.pix;
276 int ret;
277
278 /* Converts to a mplane format */
279 fmt_sp2mp(f, &fmt);
280 /* Passes it to the generic mplane format function */
281 ret = func(file, priv, &fmt);
282 /* Copies back the mplane data to the single plane format */
283 pix->width = mp->width;
284 pix->height = mp->height;
285 pix->pixelformat = mp->pixelformat;
286 pix->field = mp->field;
287 pix->colorspace = mp->colorspace;
288 pix->sizeimage = ppix->sizeimage;
289 pix->bytesperline = ppix->bytesperline;
290 pix->flags = mp->flags;
291 return ret;
292 }
293
294 /* v4l2_rect helper function: copy the width/height values */
rect_set_size_to(struct v4l2_rect * r,const struct v4l2_rect * size)295 void rect_set_size_to(struct v4l2_rect *r, const struct v4l2_rect *size)
296 {
297 r->width = size->width;
298 r->height = size->height;
299 }
300
301 /* v4l2_rect helper function: width and height of r should be >= min_size */
rect_set_min_size(struct v4l2_rect * r,const struct v4l2_rect * min_size)302 void rect_set_min_size(struct v4l2_rect *r, const struct v4l2_rect *min_size)
303 {
304 if (r->width < min_size->width)
305 r->width = min_size->width;
306 if (r->height < min_size->height)
307 r->height = min_size->height;
308 }
309
310 /* v4l2_rect helper function: width and height of r should be <= max_size */
rect_set_max_size(struct v4l2_rect * r,const struct v4l2_rect * max_size)311 void rect_set_max_size(struct v4l2_rect *r, const struct v4l2_rect *max_size)
312 {
313 if (r->width > max_size->width)
314 r->width = max_size->width;
315 if (r->height > max_size->height)
316 r->height = max_size->height;
317 }
318
319 /* v4l2_rect helper function: r should be inside boundary */
rect_map_inside(struct v4l2_rect * r,const struct v4l2_rect * boundary)320 void rect_map_inside(struct v4l2_rect *r, const struct v4l2_rect *boundary)
321 {
322 rect_set_max_size(r, boundary);
323 if (r->left < boundary->left)
324 r->left = boundary->left;
325 if (r->top < boundary->top)
326 r->top = boundary->top;
327 if (r->left + r->width > boundary->width)
328 r->left = boundary->width - r->width;
329 if (r->top + r->height > boundary->height)
330 r->top = boundary->height - r->height;
331 }
332
333 /* v4l2_rect helper function: return true if r1 has the same size as r2 */
rect_same_size(const struct v4l2_rect * r1,const struct v4l2_rect * r2)334 bool rect_same_size(const struct v4l2_rect *r1, const struct v4l2_rect *r2)
335 {
336 return r1->width == r2->width && r1->height == r2->height;
337 }
338
339 /* v4l2_rect helper function: calculate the intersection of two rects */
rect_intersect(const struct v4l2_rect * a,const struct v4l2_rect * b)340 struct v4l2_rect rect_intersect(const struct v4l2_rect *a, const struct v4l2_rect *b)
341 {
342 struct v4l2_rect r;
343 int right, bottom;
344
345 r.top = max(a->top, b->top);
346 r.left = max(a->left, b->left);
347 bottom = min(a->top + a->height, b->top + b->height);
348 right = min(a->left + a->width, b->left + b->width);
349 r.height = max(0, bottom - r.top);
350 r.width = max(0, right - r.left);
351 return r;
352 }
353
354 /*
355 * v4l2_rect helper function: scale rect r by to->width / from->width and
356 * to->height / from->height.
357 */
rect_scale(struct v4l2_rect * r,const struct v4l2_rect * from,const struct v4l2_rect * to)358 void rect_scale(struct v4l2_rect *r, const struct v4l2_rect *from,
359 const struct v4l2_rect *to)
360 {
361 if (from->width == 0 || from->height == 0) {
362 r->left = r->top = r->width = r->height = 0;
363 return;
364 }
365 r->left = (((r->left - from->left) * to->width) / from->width) & ~1;
366 r->width = ((r->width * to->width) / from->width) & ~1;
367 r->top = ((r->top - from->top) * to->height) / from->height;
368 r->height = (r->height * to->height) / from->height;
369 }
370
rect_overlap(const struct v4l2_rect * r1,const struct v4l2_rect * r2)371 bool rect_overlap(const struct v4l2_rect *r1, const struct v4l2_rect *r2)
372 {
373 /*
374 * IF the left side of r1 is to the right of the right side of r2 OR
375 * the left side of r2 is to the right of the right side of r1 THEN
376 * they do not overlap.
377 */
378 if (r1->left >= r2->left + r2->width ||
379 r2->left >= r1->left + r1->width)
380 return false;
381 /*
382 * IF the top side of r1 is below the bottom of r2 OR
383 * the top side of r2 is below the bottom of r1 THEN
384 * they do not overlap.
385 */
386 if (r1->top >= r2->top + r2->height ||
387 r2->top >= r1->top + r1->height)
388 return false;
389 return true;
390 }
vivid_vid_adjust_sel(unsigned flags,struct v4l2_rect * r)391 int vivid_vid_adjust_sel(unsigned flags, struct v4l2_rect *r)
392 {
393 unsigned w = r->width;
394 unsigned h = r->height;
395
396 if (!(flags & V4L2_SEL_FLAG_LE)) {
397 w++;
398 h++;
399 if (w < 2)
400 w = 2;
401 if (h < 2)
402 h = 2;
403 }
404 if (!(flags & V4L2_SEL_FLAG_GE)) {
405 if (w > MAX_WIDTH)
406 w = MAX_WIDTH;
407 if (h > MAX_HEIGHT)
408 h = MAX_HEIGHT;
409 }
410 w = w & ~1;
411 h = h & ~1;
412 if (w < 2 || h < 2)
413 return -ERANGE;
414 if (w > MAX_WIDTH || h > MAX_HEIGHT)
415 return -ERANGE;
416 if (r->top < 0)
417 r->top = 0;
418 if (r->left < 0)
419 r->left = 0;
420 r->left &= ~1;
421 r->top &= ~1;
422 if (r->left + w > MAX_WIDTH)
423 r->left = MAX_WIDTH - w;
424 if (r->top + h > MAX_HEIGHT)
425 r->top = MAX_HEIGHT - h;
426 if ((flags & (V4L2_SEL_FLAG_GE | V4L2_SEL_FLAG_LE)) ==
427 (V4L2_SEL_FLAG_GE | V4L2_SEL_FLAG_LE) &&
428 (r->width != w || r->height != h))
429 return -ERANGE;
430 r->width = w;
431 r->height = h;
432 return 0;
433 }
434
vivid_enum_fmt_vid(struct file * file,void * priv,struct v4l2_fmtdesc * f)435 int vivid_enum_fmt_vid(struct file *file, void *priv,
436 struct v4l2_fmtdesc *f)
437 {
438 struct vivid_dev *dev = video_drvdata(file);
439 const struct vivid_fmt *fmt;
440
441 if (f->index >= ARRAY_SIZE(vivid_formats) -
442 (dev->multiplanar ? 0 : VIVID_MPLANAR_FORMATS))
443 return -EINVAL;
444
445 fmt = &vivid_formats[f->index];
446
447 strlcpy(f->description, fmt->name, sizeof(f->description));
448 f->pixelformat = fmt->fourcc;
449 return 0;
450 }
451
vidioc_enum_fmt_vid_mplane(struct file * file,void * priv,struct v4l2_fmtdesc * f)452 int vidioc_enum_fmt_vid_mplane(struct file *file, void *priv,
453 struct v4l2_fmtdesc *f)
454 {
455 struct vivid_dev *dev = video_drvdata(file);
456
457 if (!dev->multiplanar)
458 return -ENOTTY;
459 return vivid_enum_fmt_vid(file, priv, f);
460 }
461
vidioc_enum_fmt_vid(struct file * file,void * priv,struct v4l2_fmtdesc * f)462 int vidioc_enum_fmt_vid(struct file *file, void *priv,
463 struct v4l2_fmtdesc *f)
464 {
465 struct vivid_dev *dev = video_drvdata(file);
466
467 if (dev->multiplanar)
468 return -ENOTTY;
469 return vivid_enum_fmt_vid(file, priv, f);
470 }
471
vidioc_g_std(struct file * file,void * priv,v4l2_std_id * id)472 int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
473 {
474 struct vivid_dev *dev = video_drvdata(file);
475 struct video_device *vdev = video_devdata(file);
476
477 if (vdev->vfl_dir == VFL_DIR_RX) {
478 if (!vivid_is_sdtv_cap(dev))
479 return -ENODATA;
480 *id = dev->std_cap;
481 } else {
482 if (!vivid_is_svid_out(dev))
483 return -ENODATA;
484 *id = dev->std_out;
485 }
486 return 0;
487 }
488
vidioc_g_dv_timings(struct file * file,void * _fh,struct v4l2_dv_timings * timings)489 int vidioc_g_dv_timings(struct file *file, void *_fh,
490 struct v4l2_dv_timings *timings)
491 {
492 struct vivid_dev *dev = video_drvdata(file);
493 struct video_device *vdev = video_devdata(file);
494
495 if (vdev->vfl_dir == VFL_DIR_RX) {
496 if (!vivid_is_hdmi_cap(dev))
497 return -ENODATA;
498 *timings = dev->dv_timings_cap;
499 } else {
500 if (!vivid_is_hdmi_out(dev))
501 return -ENODATA;
502 *timings = dev->dv_timings_out;
503 }
504 return 0;
505 }
506
vidioc_enum_dv_timings(struct file * file,void * _fh,struct v4l2_enum_dv_timings * timings)507 int vidioc_enum_dv_timings(struct file *file, void *_fh,
508 struct v4l2_enum_dv_timings *timings)
509 {
510 struct vivid_dev *dev = video_drvdata(file);
511 struct video_device *vdev = video_devdata(file);
512
513 if (vdev->vfl_dir == VFL_DIR_RX) {
514 if (!vivid_is_hdmi_cap(dev))
515 return -ENODATA;
516 } else {
517 if (!vivid_is_hdmi_out(dev))
518 return -ENODATA;
519 }
520 return v4l2_enum_dv_timings_cap(timings, &vivid_dv_timings_cap,
521 NULL, NULL);
522 }
523
vidioc_dv_timings_cap(struct file * file,void * _fh,struct v4l2_dv_timings_cap * cap)524 int vidioc_dv_timings_cap(struct file *file, void *_fh,
525 struct v4l2_dv_timings_cap *cap)
526 {
527 struct vivid_dev *dev = video_drvdata(file);
528 struct video_device *vdev = video_devdata(file);
529
530 if (vdev->vfl_dir == VFL_DIR_RX) {
531 if (!vivid_is_hdmi_cap(dev))
532 return -ENODATA;
533 } else {
534 if (!vivid_is_hdmi_out(dev))
535 return -ENODATA;
536 }
537 *cap = vivid_dv_timings_cap;
538 return 0;
539 }
540
vidioc_g_edid(struct file * file,void * _fh,struct v4l2_edid * edid)541 int vidioc_g_edid(struct file *file, void *_fh,
542 struct v4l2_edid *edid)
543 {
544 struct vivid_dev *dev = video_drvdata(file);
545 struct video_device *vdev = video_devdata(file);
546
547 memset(edid->reserved, 0, sizeof(edid->reserved));
548 if (vdev->vfl_dir == VFL_DIR_RX) {
549 if (edid->pad >= dev->num_inputs)
550 return -EINVAL;
551 if (dev->input_type[edid->pad] != HDMI)
552 return -EINVAL;
553 } else {
554 if (edid->pad >= dev->num_outputs)
555 return -EINVAL;
556 if (dev->output_type[edid->pad] != HDMI)
557 return -EINVAL;
558 }
559 if (edid->start_block == 0 && edid->blocks == 0) {
560 edid->blocks = dev->edid_blocks;
561 return 0;
562 }
563 if (dev->edid_blocks == 0)
564 return -ENODATA;
565 if (edid->start_block >= dev->edid_blocks)
566 return -EINVAL;
567 if (edid->start_block + edid->blocks > dev->edid_blocks)
568 edid->blocks = dev->edid_blocks - edid->start_block;
569 memcpy(edid->edid, dev->edid, edid->blocks * 128);
570 return 0;
571 }
572