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ef834f78 HV |
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 | ||
189 | const struct vivid_fmt *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 | ||
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 | ||
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 | */ | |
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 | ||
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 */ | |
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 */ | |
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 */ | |
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 */ | |
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 */ | |
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 */ | |
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 | */ | |
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 | ||
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 | } | |
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | } |