1 /*
2 * Copyright (C) 2012 Avionic Design GmbH
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sub license,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
13 * of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24 #include <linux/bitops.h>
25 #include <linux/bug.h>
26 #include <linux/errno.h>
27 #include <linux/export.h>
28 #include <linux/hdmi.h>
29 #include <linux/string.h>
30 #include <linux/device.h>
31
32 #define hdmi_log(fmt, ...) dev_printk(level, dev, fmt, ##__VA_ARGS__)
33
hdmi_infoframe_checksum(const u8 * ptr,size_t size)34 static u8 hdmi_infoframe_checksum(const u8 *ptr, size_t size)
35 {
36 u8 csum = 0;
37 size_t i;
38
39 /* compute checksum */
40 for (i = 0; i < size; i++)
41 csum += ptr[i];
42
43 return 256 - csum;
44 }
45
hdmi_infoframe_set_checksum(void * buffer,size_t size)46 static void hdmi_infoframe_set_checksum(void *buffer, size_t size)
47 {
48 u8 *ptr = buffer;
49
50 ptr[3] = hdmi_infoframe_checksum(buffer, size);
51 }
52
53 /**
54 * hdmi_avi_infoframe_init() - initialize an HDMI AVI infoframe
55 * @frame: HDMI AVI infoframe
56 *
57 * Returns 0 on success or a negative error code on failure.
58 */
hdmi_avi_infoframe_init(struct hdmi_avi_infoframe * frame)59 int hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame)
60 {
61 memset(frame, 0, sizeof(*frame));
62
63 frame->type = HDMI_INFOFRAME_TYPE_AVI;
64 frame->version = 2;
65 frame->length = HDMI_AVI_INFOFRAME_SIZE;
66
67 return 0;
68 }
69 EXPORT_SYMBOL(hdmi_avi_infoframe_init);
70
hdmi_avi_infoframe_check_only(const struct hdmi_avi_infoframe * frame)71 static int hdmi_avi_infoframe_check_only(const struct hdmi_avi_infoframe *frame)
72 {
73 if (frame->type != HDMI_INFOFRAME_TYPE_AVI ||
74 frame->version != 2 ||
75 frame->length != HDMI_AVI_INFOFRAME_SIZE)
76 return -EINVAL;
77
78 if (frame->picture_aspect > HDMI_PICTURE_ASPECT_16_9)
79 return -EINVAL;
80
81 return 0;
82 }
83
84 /**
85 * hdmi_avi_infoframe_check() - check a HDMI AVI infoframe
86 * @frame: HDMI AVI infoframe
87 *
88 * Validates that the infoframe is consistent and updates derived fields
89 * (eg. length) based on other fields.
90 *
91 * Returns 0 on success or a negative error code on failure.
92 */
hdmi_avi_infoframe_check(struct hdmi_avi_infoframe * frame)93 int hdmi_avi_infoframe_check(struct hdmi_avi_infoframe *frame)
94 {
95 return hdmi_avi_infoframe_check_only(frame);
96 }
97 EXPORT_SYMBOL(hdmi_avi_infoframe_check);
98
99 /**
100 * hdmi_avi_infoframe_pack_only() - write HDMI AVI infoframe to binary buffer
101 * @frame: HDMI AVI infoframe
102 * @buffer: destination buffer
103 * @size: size of buffer
104 *
105 * Packs the information contained in the @frame structure into a binary
106 * representation that can be written into the corresponding controller
107 * registers. Also computes the checksum as required by section 5.3.5 of
108 * the HDMI 1.4 specification.
109 *
110 * Returns the number of bytes packed into the binary buffer or a negative
111 * error code on failure.
112 */
hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe * frame,void * buffer,size_t size)113 ssize_t hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe *frame,
114 void *buffer, size_t size)
115 {
116 u8 *ptr = buffer;
117 size_t length;
118 int ret;
119
120 ret = hdmi_avi_infoframe_check_only(frame);
121 if (ret)
122 return ret;
123
124 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
125
126 if (size < length)
127 return -ENOSPC;
128
129 memset(buffer, 0, size);
130
131 ptr[0] = frame->type;
132 ptr[1] = frame->version;
133 ptr[2] = frame->length;
134 ptr[3] = 0; /* checksum */
135
136 /* start infoframe payload */
137 ptr += HDMI_INFOFRAME_HEADER_SIZE;
138
139 ptr[0] = ((frame->colorspace & 0x3) << 5) | (frame->scan_mode & 0x3);
140
141 /*
142 * Data byte 1, bit 4 has to be set if we provide the active format
143 * aspect ratio
144 */
145 if (frame->active_aspect & 0xf)
146 ptr[0] |= BIT(4);
147
148 /* Bit 3 and 2 indicate if we transmit horizontal/vertical bar data */
149 if (frame->top_bar || frame->bottom_bar)
150 ptr[0] |= BIT(3);
151
152 if (frame->left_bar || frame->right_bar)
153 ptr[0] |= BIT(2);
154
155 ptr[1] = ((frame->colorimetry & 0x3) << 6) |
156 ((frame->picture_aspect & 0x3) << 4) |
157 (frame->active_aspect & 0xf);
158
159 ptr[2] = ((frame->extended_colorimetry & 0x7) << 4) |
160 ((frame->quantization_range & 0x3) << 2) |
161 (frame->nups & 0x3);
162
163 if (frame->itc)
164 ptr[2] |= BIT(7);
165
166 ptr[3] = frame->video_code & 0x7f;
167
168 ptr[4] = ((frame->ycc_quantization_range & 0x3) << 6) |
169 ((frame->content_type & 0x3) << 4) |
170 (frame->pixel_repeat & 0xf);
171
172 ptr[5] = frame->top_bar & 0xff;
173 ptr[6] = (frame->top_bar >> 8) & 0xff;
174 ptr[7] = frame->bottom_bar & 0xff;
175 ptr[8] = (frame->bottom_bar >> 8) & 0xff;
176 ptr[9] = frame->left_bar & 0xff;
177 ptr[10] = (frame->left_bar >> 8) & 0xff;
178 ptr[11] = frame->right_bar & 0xff;
179 ptr[12] = (frame->right_bar >> 8) & 0xff;
180
181 hdmi_infoframe_set_checksum(buffer, length);
182
183 return length;
184 }
185 EXPORT_SYMBOL(hdmi_avi_infoframe_pack_only);
186
187 /**
188 * hdmi_avi_infoframe_pack() - check a HDMI AVI infoframe,
189 * and write it to binary buffer
190 * @frame: HDMI AVI infoframe
191 * @buffer: destination buffer
192 * @size: size of buffer
193 *
194 * Validates that the infoframe is consistent and updates derived fields
195 * (eg. length) based on other fields, after which it packs the information
196 * contained in the @frame structure into a binary representation that
197 * can be written into the corresponding controller registers. This function
198 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
199 * specification.
200 *
201 * Returns the number of bytes packed into the binary buffer or a negative
202 * error code on failure.
203 */
hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe * frame,void * buffer,size_t size)204 ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame,
205 void *buffer, size_t size)
206 {
207 int ret;
208
209 ret = hdmi_avi_infoframe_check(frame);
210 if (ret)
211 return ret;
212
213 return hdmi_avi_infoframe_pack_only(frame, buffer, size);
214 }
215 EXPORT_SYMBOL(hdmi_avi_infoframe_pack);
216
217 /**
218 * hdmi_spd_infoframe_init() - initialize an HDMI SPD infoframe
219 * @frame: HDMI SPD infoframe
220 * @vendor: vendor string
221 * @product: product string
222 *
223 * Returns 0 on success or a negative error code on failure.
224 */
hdmi_spd_infoframe_init(struct hdmi_spd_infoframe * frame,const char * vendor,const char * product)225 int hdmi_spd_infoframe_init(struct hdmi_spd_infoframe *frame,
226 const char *vendor, const char *product)
227 {
228 memset(frame, 0, sizeof(*frame));
229
230 frame->type = HDMI_INFOFRAME_TYPE_SPD;
231 frame->version = 1;
232 frame->length = HDMI_SPD_INFOFRAME_SIZE;
233
234 strncpy(frame->vendor, vendor, sizeof(frame->vendor));
235 strncpy(frame->product, product, sizeof(frame->product));
236
237 return 0;
238 }
239 EXPORT_SYMBOL(hdmi_spd_infoframe_init);
240
hdmi_spd_infoframe_check_only(const struct hdmi_spd_infoframe * frame)241 static int hdmi_spd_infoframe_check_only(const struct hdmi_spd_infoframe *frame)
242 {
243 if (frame->type != HDMI_INFOFRAME_TYPE_SPD ||
244 frame->version != 1 ||
245 frame->length != HDMI_SPD_INFOFRAME_SIZE)
246 return -EINVAL;
247
248 return 0;
249 }
250
251 /**
252 * hdmi_spd_infoframe_check() - check a HDMI SPD infoframe
253 * @frame: HDMI SPD infoframe
254 *
255 * Validates that the infoframe is consistent and updates derived fields
256 * (eg. length) based on other fields.
257 *
258 * Returns 0 on success or a negative error code on failure.
259 */
hdmi_spd_infoframe_check(struct hdmi_spd_infoframe * frame)260 int hdmi_spd_infoframe_check(struct hdmi_spd_infoframe *frame)
261 {
262 return hdmi_spd_infoframe_check_only(frame);
263 }
264 EXPORT_SYMBOL(hdmi_spd_infoframe_check);
265
266 /**
267 * hdmi_spd_infoframe_pack_only() - write HDMI SPD infoframe to binary buffer
268 * @frame: HDMI SPD infoframe
269 * @buffer: destination buffer
270 * @size: size of buffer
271 *
272 * Packs the information contained in the @frame structure into a binary
273 * representation that can be written into the corresponding controller
274 * registers. Also computes the checksum as required by section 5.3.5 of
275 * the HDMI 1.4 specification.
276 *
277 * Returns the number of bytes packed into the binary buffer or a negative
278 * error code on failure.
279 */
hdmi_spd_infoframe_pack_only(const struct hdmi_spd_infoframe * frame,void * buffer,size_t size)280 ssize_t hdmi_spd_infoframe_pack_only(const struct hdmi_spd_infoframe *frame,
281 void *buffer, size_t size)
282 {
283 u8 *ptr = buffer;
284 size_t length;
285 int ret;
286
287 ret = hdmi_spd_infoframe_check_only(frame);
288 if (ret)
289 return ret;
290
291 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
292
293 if (size < length)
294 return -ENOSPC;
295
296 memset(buffer, 0, size);
297
298 ptr[0] = frame->type;
299 ptr[1] = frame->version;
300 ptr[2] = frame->length;
301 ptr[3] = 0; /* checksum */
302
303 /* start infoframe payload */
304 ptr += HDMI_INFOFRAME_HEADER_SIZE;
305
306 memcpy(ptr, frame->vendor, sizeof(frame->vendor));
307 memcpy(ptr + 8, frame->product, sizeof(frame->product));
308
309 ptr[24] = frame->sdi;
310
311 hdmi_infoframe_set_checksum(buffer, length);
312
313 return length;
314 }
315 EXPORT_SYMBOL(hdmi_spd_infoframe_pack_only);
316
317 /**
318 * hdmi_spd_infoframe_pack() - check a HDMI SPD infoframe,
319 * and write it to binary buffer
320 * @frame: HDMI SPD infoframe
321 * @buffer: destination buffer
322 * @size: size of buffer
323 *
324 * Validates that the infoframe is consistent and updates derived fields
325 * (eg. length) based on other fields, after which it packs the information
326 * contained in the @frame structure into a binary representation that
327 * can be written into the corresponding controller registers. This function
328 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
329 * specification.
330 *
331 * Returns the number of bytes packed into the binary buffer or a negative
332 * error code on failure.
333 */
hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe * frame,void * buffer,size_t size)334 ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame,
335 void *buffer, size_t size)
336 {
337 int ret;
338
339 ret = hdmi_spd_infoframe_check(frame);
340 if (ret)
341 return ret;
342
343 return hdmi_spd_infoframe_pack_only(frame, buffer, size);
344 }
345 EXPORT_SYMBOL(hdmi_spd_infoframe_pack);
346
347 /**
348 * hdmi_audio_infoframe_init() - initialize an HDMI audio infoframe
349 * @frame: HDMI audio infoframe
350 *
351 * Returns 0 on success or a negative error code on failure.
352 */
hdmi_audio_infoframe_init(struct hdmi_audio_infoframe * frame)353 int hdmi_audio_infoframe_init(struct hdmi_audio_infoframe *frame)
354 {
355 memset(frame, 0, sizeof(*frame));
356
357 frame->type = HDMI_INFOFRAME_TYPE_AUDIO;
358 frame->version = 1;
359 frame->length = HDMI_AUDIO_INFOFRAME_SIZE;
360
361 return 0;
362 }
363 EXPORT_SYMBOL(hdmi_audio_infoframe_init);
364
hdmi_audio_infoframe_check_only(const struct hdmi_audio_infoframe * frame)365 static int hdmi_audio_infoframe_check_only(const struct hdmi_audio_infoframe *frame)
366 {
367 if (frame->type != HDMI_INFOFRAME_TYPE_AUDIO ||
368 frame->version != 1 ||
369 frame->length != HDMI_AUDIO_INFOFRAME_SIZE)
370 return -EINVAL;
371
372 return 0;
373 }
374
375 /**
376 * hdmi_audio_infoframe_check() - check a HDMI audio infoframe
377 * @frame: HDMI audio infoframe
378 *
379 * Validates that the infoframe is consistent and updates derived fields
380 * (eg. length) based on other fields.
381 *
382 * Returns 0 on success or a negative error code on failure.
383 */
hdmi_audio_infoframe_check(struct hdmi_audio_infoframe * frame)384 int hdmi_audio_infoframe_check(struct hdmi_audio_infoframe *frame)
385 {
386 return hdmi_audio_infoframe_check_only(frame);
387 }
388 EXPORT_SYMBOL(hdmi_audio_infoframe_check);
389
390 /**
391 * hdmi_audio_infoframe_pack_only() - write HDMI audio infoframe to binary buffer
392 * @frame: HDMI audio infoframe
393 * @buffer: destination buffer
394 * @size: size of buffer
395 *
396 * Packs the information contained in the @frame structure into a binary
397 * representation that can be written into the corresponding controller
398 * registers. Also computes the checksum as required by section 5.3.5 of
399 * the HDMI 1.4 specification.
400 *
401 * Returns the number of bytes packed into the binary buffer or a negative
402 * error code on failure.
403 */
hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe * frame,void * buffer,size_t size)404 ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame,
405 void *buffer, size_t size)
406 {
407 unsigned char channels;
408 u8 *ptr = buffer;
409 size_t length;
410 int ret;
411
412 ret = hdmi_audio_infoframe_check_only(frame);
413 if (ret)
414 return ret;
415
416 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
417
418 if (size < length)
419 return -ENOSPC;
420
421 memset(buffer, 0, size);
422
423 if (frame->channels >= 2)
424 channels = frame->channels - 1;
425 else
426 channels = 0;
427
428 ptr[0] = frame->type;
429 ptr[1] = frame->version;
430 ptr[2] = frame->length;
431 ptr[3] = 0; /* checksum */
432
433 /* start infoframe payload */
434 ptr += HDMI_INFOFRAME_HEADER_SIZE;
435
436 ptr[0] = ((frame->coding_type & 0xf) << 4) | (channels & 0x7);
437 ptr[1] = ((frame->sample_frequency & 0x7) << 2) |
438 (frame->sample_size & 0x3);
439 ptr[2] = frame->coding_type_ext & 0x1f;
440 ptr[3] = frame->channel_allocation;
441 ptr[4] = (frame->level_shift_value & 0xf) << 3;
442
443 if (frame->downmix_inhibit)
444 ptr[4] |= BIT(7);
445
446 hdmi_infoframe_set_checksum(buffer, length);
447
448 return length;
449 }
450 EXPORT_SYMBOL(hdmi_audio_infoframe_pack_only);
451
452 /**
453 * hdmi_audio_infoframe_pack() - check a HDMI Audio infoframe,
454 * and write it to binary buffer
455 * @frame: HDMI Audio infoframe
456 * @buffer: destination buffer
457 * @size: size of buffer
458 *
459 * Validates that the infoframe is consistent and updates derived fields
460 * (eg. length) based on other fields, after which it packs the information
461 * contained in the @frame structure into a binary representation that
462 * can be written into the corresponding controller registers. This function
463 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
464 * specification.
465 *
466 * Returns the number of bytes packed into the binary buffer or a negative
467 * error code on failure.
468 */
hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe * frame,void * buffer,size_t size)469 ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame,
470 void *buffer, size_t size)
471 {
472 int ret;
473
474 ret = hdmi_audio_infoframe_check(frame);
475 if (ret)
476 return ret;
477
478 return hdmi_audio_infoframe_pack_only(frame, buffer, size);
479 }
480 EXPORT_SYMBOL(hdmi_audio_infoframe_pack);
481
482 /**
483 * hdmi_vendor_infoframe_init() - initialize an HDMI vendor infoframe
484 * @frame: HDMI vendor infoframe
485 *
486 * Returns 0 on success or a negative error code on failure.
487 */
hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe * frame)488 int hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe *frame)
489 {
490 memset(frame, 0, sizeof(*frame));
491
492 frame->type = HDMI_INFOFRAME_TYPE_VENDOR;
493 frame->version = 1;
494
495 frame->oui = HDMI_IEEE_OUI;
496
497 /*
498 * 0 is a valid value for s3d_struct, so we use a special "not set"
499 * value
500 */
501 frame->s3d_struct = HDMI_3D_STRUCTURE_INVALID;
502 frame->length = 4;
503
504 return 0;
505 }
506 EXPORT_SYMBOL(hdmi_vendor_infoframe_init);
507
hdmi_vendor_infoframe_length(const struct hdmi_vendor_infoframe * frame)508 static int hdmi_vendor_infoframe_length(const struct hdmi_vendor_infoframe *frame)
509 {
510 /* for side by side (half) we also need to provide 3D_Ext_Data */
511 if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
512 return 6;
513 else if (frame->vic != 0 || frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
514 return 5;
515 else
516 return 4;
517 }
518
hdmi_vendor_infoframe_check_only(const struct hdmi_vendor_infoframe * frame)519 static int hdmi_vendor_infoframe_check_only(const struct hdmi_vendor_infoframe *frame)
520 {
521 if (frame->type != HDMI_INFOFRAME_TYPE_VENDOR ||
522 frame->version != 1 ||
523 frame->oui != HDMI_IEEE_OUI)
524 return -EINVAL;
525
526 /* only one of those can be supplied */
527 if (frame->vic != 0 && frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
528 return -EINVAL;
529
530 if (frame->length != hdmi_vendor_infoframe_length(frame))
531 return -EINVAL;
532
533 return 0;
534 }
535
536 /**
537 * hdmi_vendor_infoframe_check() - check a HDMI vendor infoframe
538 * @frame: HDMI infoframe
539 *
540 * Validates that the infoframe is consistent and updates derived fields
541 * (eg. length) based on other fields.
542 *
543 * Returns 0 on success or a negative error code on failure.
544 */
hdmi_vendor_infoframe_check(struct hdmi_vendor_infoframe * frame)545 int hdmi_vendor_infoframe_check(struct hdmi_vendor_infoframe *frame)
546 {
547 frame->length = hdmi_vendor_infoframe_length(frame);
548
549 return hdmi_vendor_infoframe_check_only(frame);
550 }
551 EXPORT_SYMBOL(hdmi_vendor_infoframe_check);
552
553 /**
554 * hdmi_vendor_infoframe_pack_only() - write a HDMI vendor infoframe to binary buffer
555 * @frame: HDMI infoframe
556 * @buffer: destination buffer
557 * @size: size of buffer
558 *
559 * Packs the information contained in the @frame structure into a binary
560 * representation that can be written into the corresponding controller
561 * registers. Also computes the checksum as required by section 5.3.5 of
562 * the HDMI 1.4 specification.
563 *
564 * Returns the number of bytes packed into the binary buffer or a negative
565 * error code on failure.
566 */
hdmi_vendor_infoframe_pack_only(const struct hdmi_vendor_infoframe * frame,void * buffer,size_t size)567 ssize_t hdmi_vendor_infoframe_pack_only(const struct hdmi_vendor_infoframe *frame,
568 void *buffer, size_t size)
569 {
570 u8 *ptr = buffer;
571 size_t length;
572 int ret;
573
574 ret = hdmi_vendor_infoframe_check_only(frame);
575 if (ret)
576 return ret;
577
578 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
579
580 if (size < length)
581 return -ENOSPC;
582
583 memset(buffer, 0, size);
584
585 ptr[0] = frame->type;
586 ptr[1] = frame->version;
587 ptr[2] = frame->length;
588 ptr[3] = 0; /* checksum */
589
590 /* HDMI OUI */
591 ptr[4] = 0x03;
592 ptr[5] = 0x0c;
593 ptr[6] = 0x00;
594
595 if (frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
596 ptr[7] = 0x2 << 5; /* video format */
597 ptr[8] = (frame->s3d_struct & 0xf) << 4;
598 if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
599 ptr[9] = (frame->s3d_ext_data & 0xf) << 4;
600 } else if (frame->vic) {
601 ptr[7] = 0x1 << 5; /* video format */
602 ptr[8] = frame->vic;
603 } else {
604 ptr[7] = 0x0 << 5; /* video format */
605 }
606
607 hdmi_infoframe_set_checksum(buffer, length);
608
609 return length;
610 }
611 EXPORT_SYMBOL(hdmi_vendor_infoframe_pack_only);
612
613 /**
614 * hdmi_vendor_infoframe_pack() - check a HDMI Vendor infoframe,
615 * and write it to binary buffer
616 * @frame: HDMI Vendor infoframe
617 * @buffer: destination buffer
618 * @size: size of buffer
619 *
620 * Validates that the infoframe is consistent and updates derived fields
621 * (eg. length) based on other fields, after which it packs the information
622 * contained in the @frame structure into a binary representation that
623 * can be written into the corresponding controller registers. This function
624 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
625 * specification.
626 *
627 * Returns the number of bytes packed into the binary buffer or a negative
628 * error code on failure.
629 */
hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe * frame,void * buffer,size_t size)630 ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
631 void *buffer, size_t size)
632 {
633 int ret;
634
635 ret = hdmi_vendor_infoframe_check(frame);
636 if (ret)
637 return ret;
638
639 return hdmi_vendor_infoframe_pack_only(frame, buffer, size);
640 }
641 EXPORT_SYMBOL(hdmi_vendor_infoframe_pack);
642
643 static int
hdmi_vendor_any_infoframe_check_only(const union hdmi_vendor_any_infoframe * frame)644 hdmi_vendor_any_infoframe_check_only(const union hdmi_vendor_any_infoframe *frame)
645 {
646 if (frame->any.type != HDMI_INFOFRAME_TYPE_VENDOR ||
647 frame->any.version != 1)
648 return -EINVAL;
649
650 return 0;
651 }
652
653 /**
654 * hdmi_drm_infoframe_init() - initialize an HDMI Dynaminc Range and
655 * mastering infoframe
656 * @frame: HDMI DRM infoframe
657 *
658 * Returns 0 on success or a negative error code on failure.
659 */
hdmi_drm_infoframe_init(struct hdmi_drm_infoframe * frame)660 int hdmi_drm_infoframe_init(struct hdmi_drm_infoframe *frame)
661 {
662 memset(frame, 0, sizeof(*frame));
663
664 frame->type = HDMI_INFOFRAME_TYPE_DRM;
665 frame->version = 1;
666 frame->length = HDMI_DRM_INFOFRAME_SIZE;
667
668 return 0;
669 }
670 EXPORT_SYMBOL(hdmi_drm_infoframe_init);
671
hdmi_drm_infoframe_check_only(const struct hdmi_drm_infoframe * frame)672 static int hdmi_drm_infoframe_check_only(const struct hdmi_drm_infoframe *frame)
673 {
674 if (frame->type != HDMI_INFOFRAME_TYPE_DRM ||
675 frame->version != 1)
676 return -EINVAL;
677
678 if (frame->length != HDMI_DRM_INFOFRAME_SIZE)
679 return -EINVAL;
680
681 return 0;
682 }
683
684 /**
685 * hdmi_drm_infoframe_check() - check a HDMI DRM infoframe
686 * @frame: HDMI DRM infoframe
687 *
688 * Validates that the infoframe is consistent.
689 * Returns 0 on success or a negative error code on failure.
690 */
hdmi_drm_infoframe_check(struct hdmi_drm_infoframe * frame)691 int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame)
692 {
693 return hdmi_drm_infoframe_check_only(frame);
694 }
695 EXPORT_SYMBOL(hdmi_drm_infoframe_check);
696
697 /**
698 * hdmi_drm_infoframe_pack_only() - write HDMI DRM infoframe to binary buffer
699 * @frame: HDMI DRM infoframe
700 * @buffer: destination buffer
701 * @size: size of buffer
702 *
703 * Packs the information contained in the @frame structure into a binary
704 * representation that can be written into the corresponding controller
705 * registers. Also computes the checksum as required by section 5.3.5 of
706 * the HDMI 1.4 specification.
707 *
708 * Returns the number of bytes packed into the binary buffer or a negative
709 * error code on failure.
710 */
hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe * frame,void * buffer,size_t size)711 ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
712 void *buffer, size_t size)
713 {
714 u8 *ptr = buffer;
715 size_t length;
716 int i;
717
718 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
719
720 if (size < length)
721 return -ENOSPC;
722
723 memset(buffer, 0, size);
724
725 ptr[0] = frame->type;
726 ptr[1] = frame->version;
727 ptr[2] = frame->length;
728 ptr[3] = 0; /* checksum */
729
730 /* start infoframe payload */
731 ptr += HDMI_INFOFRAME_HEADER_SIZE;
732
733 *ptr++ = frame->eotf;
734 *ptr++ = frame->metadata_type;
735
736 for (i = 0; i < 3; i++) {
737 *ptr++ = frame->display_primaries[i].x;
738 *ptr++ = frame->display_primaries[i].x >> 8;
739 *ptr++ = frame->display_primaries[i].y;
740 *ptr++ = frame->display_primaries[i].y >> 8;
741 }
742
743 *ptr++ = frame->white_point.x;
744 *ptr++ = frame->white_point.x >> 8;
745
746 *ptr++ = frame->white_point.y;
747 *ptr++ = frame->white_point.y >> 8;
748
749 *ptr++ = frame->max_display_mastering_luminance;
750 *ptr++ = frame->max_display_mastering_luminance >> 8;
751
752 *ptr++ = frame->min_display_mastering_luminance;
753 *ptr++ = frame->min_display_mastering_luminance >> 8;
754
755 *ptr++ = frame->max_cll;
756 *ptr++ = frame->max_cll >> 8;
757
758 *ptr++ = frame->max_fall;
759 *ptr++ = frame->max_fall >> 8;
760
761 hdmi_infoframe_set_checksum(buffer, length);
762
763 return length;
764 }
765 EXPORT_SYMBOL(hdmi_drm_infoframe_pack_only);
766
767 /**
768 * hdmi_drm_infoframe_pack() - check a HDMI DRM infoframe,
769 * and write it to binary buffer
770 * @frame: HDMI DRM infoframe
771 * @buffer: destination buffer
772 * @size: size of buffer
773 *
774 * Validates that the infoframe is consistent and updates derived fields
775 * (eg. length) based on other fields, after which it packs the information
776 * contained in the @frame structure into a binary representation that
777 * can be written into the corresponding controller registers. This function
778 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
779 * specification.
780 *
781 * Returns the number of bytes packed into the binary buffer or a negative
782 * error code on failure.
783 */
hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe * frame,void * buffer,size_t size)784 ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame,
785 void *buffer, size_t size)
786 {
787 int ret;
788
789 ret = hdmi_drm_infoframe_check(frame);
790 if (ret)
791 return ret;
792
793 return hdmi_drm_infoframe_pack_only(frame, buffer, size);
794 }
795 EXPORT_SYMBOL(hdmi_drm_infoframe_pack);
796
797 /*
798 * hdmi_vendor_any_infoframe_check() - check a vendor infoframe
799 */
800 static int
hdmi_vendor_any_infoframe_check(union hdmi_vendor_any_infoframe * frame)801 hdmi_vendor_any_infoframe_check(union hdmi_vendor_any_infoframe *frame)
802 {
803 int ret;
804
805 ret = hdmi_vendor_any_infoframe_check_only(frame);
806 if (ret)
807 return ret;
808
809 /* we only know about HDMI vendor infoframes */
810 if (frame->any.oui != HDMI_IEEE_OUI)
811 return -EINVAL;
812
813 return hdmi_vendor_infoframe_check(&frame->hdmi);
814 }
815
816 /*
817 * hdmi_vendor_any_infoframe_pack_only() - write a vendor infoframe to binary buffer
818 */
819 static ssize_t
hdmi_vendor_any_infoframe_pack_only(const union hdmi_vendor_any_infoframe * frame,void * buffer,size_t size)820 hdmi_vendor_any_infoframe_pack_only(const union hdmi_vendor_any_infoframe *frame,
821 void *buffer, size_t size)
822 {
823 int ret;
824
825 ret = hdmi_vendor_any_infoframe_check_only(frame);
826 if (ret)
827 return ret;
828
829 /* we only know about HDMI vendor infoframes */
830 if (frame->any.oui != HDMI_IEEE_OUI)
831 return -EINVAL;
832
833 return hdmi_vendor_infoframe_pack_only(&frame->hdmi, buffer, size);
834 }
835
836 /*
837 * hdmi_vendor_any_infoframe_pack() - check a vendor infoframe,
838 * and write it to binary buffer
839 */
840 static ssize_t
hdmi_vendor_any_infoframe_pack(union hdmi_vendor_any_infoframe * frame,void * buffer,size_t size)841 hdmi_vendor_any_infoframe_pack(union hdmi_vendor_any_infoframe *frame,
842 void *buffer, size_t size)
843 {
844 int ret;
845
846 ret = hdmi_vendor_any_infoframe_check(frame);
847 if (ret)
848 return ret;
849
850 return hdmi_vendor_any_infoframe_pack_only(frame, buffer, size);
851 }
852
853 /**
854 * hdmi_infoframe_check() - check a HDMI infoframe
855 * @frame: HDMI infoframe
856 *
857 * Validates that the infoframe is consistent and updates derived fields
858 * (eg. length) based on other fields.
859 *
860 * Returns 0 on success or a negative error code on failure.
861 */
862 int
hdmi_infoframe_check(union hdmi_infoframe * frame)863 hdmi_infoframe_check(union hdmi_infoframe *frame)
864 {
865 switch (frame->any.type) {
866 case HDMI_INFOFRAME_TYPE_AVI:
867 return hdmi_avi_infoframe_check(&frame->avi);
868 case HDMI_INFOFRAME_TYPE_SPD:
869 return hdmi_spd_infoframe_check(&frame->spd);
870 case HDMI_INFOFRAME_TYPE_AUDIO:
871 return hdmi_audio_infoframe_check(&frame->audio);
872 case HDMI_INFOFRAME_TYPE_VENDOR:
873 return hdmi_vendor_any_infoframe_check(&frame->vendor);
874 default:
875 WARN(1, "Bad infoframe type %d\n", frame->any.type);
876 return -EINVAL;
877 }
878 }
879 EXPORT_SYMBOL(hdmi_infoframe_check);
880
881 /**
882 * hdmi_infoframe_pack_only() - write a HDMI infoframe to binary buffer
883 * @frame: HDMI infoframe
884 * @buffer: destination buffer
885 * @size: size of buffer
886 *
887 * Packs the information contained in the @frame structure into a binary
888 * representation that can be written into the corresponding controller
889 * registers. Also computes the checksum as required by section 5.3.5 of
890 * the HDMI 1.4 specification.
891 *
892 * Returns the number of bytes packed into the binary buffer or a negative
893 * error code on failure.
894 */
895 ssize_t
hdmi_infoframe_pack_only(const union hdmi_infoframe * frame,void * buffer,size_t size)896 hdmi_infoframe_pack_only(const union hdmi_infoframe *frame, void *buffer, size_t size)
897 {
898 ssize_t length;
899
900 switch (frame->any.type) {
901 case HDMI_INFOFRAME_TYPE_AVI:
902 length = hdmi_avi_infoframe_pack_only(&frame->avi,
903 buffer, size);
904 break;
905 case HDMI_INFOFRAME_TYPE_DRM:
906 length = hdmi_drm_infoframe_pack_only(&frame->drm,
907 buffer, size);
908 break;
909 case HDMI_INFOFRAME_TYPE_SPD:
910 length = hdmi_spd_infoframe_pack_only(&frame->spd,
911 buffer, size);
912 break;
913 case HDMI_INFOFRAME_TYPE_AUDIO:
914 length = hdmi_audio_infoframe_pack_only(&frame->audio,
915 buffer, size);
916 break;
917 case HDMI_INFOFRAME_TYPE_VENDOR:
918 length = hdmi_vendor_any_infoframe_pack_only(&frame->vendor,
919 buffer, size);
920 break;
921 default:
922 WARN(1, "Bad infoframe type %d\n", frame->any.type);
923 length = -EINVAL;
924 }
925
926 return length;
927 }
928 EXPORT_SYMBOL(hdmi_infoframe_pack_only);
929
930 /**
931 * hdmi_infoframe_pack() - check a HDMI infoframe,
932 * and write it to binary buffer
933 * @frame: HDMI infoframe
934 * @buffer: destination buffer
935 * @size: size of buffer
936 *
937 * Validates that the infoframe is consistent and updates derived fields
938 * (eg. length) based on other fields, after which it packs the information
939 * contained in the @frame structure into a binary representation that
940 * can be written into the corresponding controller registers. This function
941 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
942 * specification.
943 *
944 * Returns the number of bytes packed into the binary buffer or a negative
945 * error code on failure.
946 */
947 ssize_t
hdmi_infoframe_pack(union hdmi_infoframe * frame,void * buffer,size_t size)948 hdmi_infoframe_pack(union hdmi_infoframe *frame,
949 void *buffer, size_t size)
950 {
951 ssize_t length;
952
953 switch (frame->any.type) {
954 case HDMI_INFOFRAME_TYPE_AVI:
955 length = hdmi_avi_infoframe_pack(&frame->avi, buffer, size);
956 break;
957 case HDMI_INFOFRAME_TYPE_DRM:
958 length = hdmi_drm_infoframe_pack(&frame->drm, buffer, size);
959 break;
960 case HDMI_INFOFRAME_TYPE_SPD:
961 length = hdmi_spd_infoframe_pack(&frame->spd, buffer, size);
962 break;
963 case HDMI_INFOFRAME_TYPE_AUDIO:
964 length = hdmi_audio_infoframe_pack(&frame->audio, buffer, size);
965 break;
966 case HDMI_INFOFRAME_TYPE_VENDOR:
967 length = hdmi_vendor_any_infoframe_pack(&frame->vendor,
968 buffer, size);
969 break;
970 default:
971 WARN(1, "Bad infoframe type %d\n", frame->any.type);
972 length = -EINVAL;
973 }
974
975 return length;
976 }
977 EXPORT_SYMBOL(hdmi_infoframe_pack);
978
hdmi_infoframe_type_get_name(enum hdmi_infoframe_type type)979 static const char *hdmi_infoframe_type_get_name(enum hdmi_infoframe_type type)
980 {
981 if (type < 0x80 || type > 0x9f)
982 return "Invalid";
983 switch (type) {
984 case HDMI_INFOFRAME_TYPE_VENDOR:
985 return "Vendor";
986 case HDMI_INFOFRAME_TYPE_AVI:
987 return "Auxiliary Video Information (AVI)";
988 case HDMI_INFOFRAME_TYPE_SPD:
989 return "Source Product Description (SPD)";
990 case HDMI_INFOFRAME_TYPE_AUDIO:
991 return "Audio";
992 case HDMI_INFOFRAME_TYPE_DRM:
993 return "Dynamic Range and Mastering";
994 }
995 return "Reserved";
996 }
997
hdmi_infoframe_log_header(const char * level,struct device * dev,const struct hdmi_any_infoframe * frame)998 static void hdmi_infoframe_log_header(const char *level,
999 struct device *dev,
1000 const struct hdmi_any_infoframe *frame)
1001 {
1002 hdmi_log("HDMI infoframe: %s, version %u, length %u\n",
1003 hdmi_infoframe_type_get_name(frame->type),
1004 frame->version, frame->length);
1005 }
1006
hdmi_colorspace_get_name(enum hdmi_colorspace colorspace)1007 static const char *hdmi_colorspace_get_name(enum hdmi_colorspace colorspace)
1008 {
1009 switch (colorspace) {
1010 case HDMI_COLORSPACE_RGB:
1011 return "RGB";
1012 case HDMI_COLORSPACE_YUV422:
1013 return "YCbCr 4:2:2";
1014 case HDMI_COLORSPACE_YUV444:
1015 return "YCbCr 4:4:4";
1016 case HDMI_COLORSPACE_YUV420:
1017 return "YCbCr 4:2:0";
1018 case HDMI_COLORSPACE_RESERVED4:
1019 return "Reserved (4)";
1020 case HDMI_COLORSPACE_RESERVED5:
1021 return "Reserved (5)";
1022 case HDMI_COLORSPACE_RESERVED6:
1023 return "Reserved (6)";
1024 case HDMI_COLORSPACE_IDO_DEFINED:
1025 return "IDO Defined";
1026 }
1027 return "Invalid";
1028 }
1029
hdmi_scan_mode_get_name(enum hdmi_scan_mode scan_mode)1030 static const char *hdmi_scan_mode_get_name(enum hdmi_scan_mode scan_mode)
1031 {
1032 switch (scan_mode) {
1033 case HDMI_SCAN_MODE_NONE:
1034 return "No Data";
1035 case HDMI_SCAN_MODE_OVERSCAN:
1036 return "Overscan";
1037 case HDMI_SCAN_MODE_UNDERSCAN:
1038 return "Underscan";
1039 case HDMI_SCAN_MODE_RESERVED:
1040 return "Reserved";
1041 }
1042 return "Invalid";
1043 }
1044
hdmi_colorimetry_get_name(enum hdmi_colorimetry colorimetry)1045 static const char *hdmi_colorimetry_get_name(enum hdmi_colorimetry colorimetry)
1046 {
1047 switch (colorimetry) {
1048 case HDMI_COLORIMETRY_NONE:
1049 return "No Data";
1050 case HDMI_COLORIMETRY_ITU_601:
1051 return "ITU601";
1052 case HDMI_COLORIMETRY_ITU_709:
1053 return "ITU709";
1054 case HDMI_COLORIMETRY_EXTENDED:
1055 return "Extended";
1056 }
1057 return "Invalid";
1058 }
1059
1060 static const char *
hdmi_picture_aspect_get_name(enum hdmi_picture_aspect picture_aspect)1061 hdmi_picture_aspect_get_name(enum hdmi_picture_aspect picture_aspect)
1062 {
1063 switch (picture_aspect) {
1064 case HDMI_PICTURE_ASPECT_NONE:
1065 return "No Data";
1066 case HDMI_PICTURE_ASPECT_4_3:
1067 return "4:3";
1068 case HDMI_PICTURE_ASPECT_16_9:
1069 return "16:9";
1070 case HDMI_PICTURE_ASPECT_64_27:
1071 return "64:27";
1072 case HDMI_PICTURE_ASPECT_256_135:
1073 return "256:135";
1074 case HDMI_PICTURE_ASPECT_RESERVED:
1075 return "Reserved";
1076 }
1077 return "Invalid";
1078 }
1079
1080 static const char *
hdmi_active_aspect_get_name(enum hdmi_active_aspect active_aspect)1081 hdmi_active_aspect_get_name(enum hdmi_active_aspect active_aspect)
1082 {
1083 if (active_aspect < 0 || active_aspect > 0xf)
1084 return "Invalid";
1085
1086 switch (active_aspect) {
1087 case HDMI_ACTIVE_ASPECT_16_9_TOP:
1088 return "16:9 Top";
1089 case HDMI_ACTIVE_ASPECT_14_9_TOP:
1090 return "14:9 Top";
1091 case HDMI_ACTIVE_ASPECT_16_9_CENTER:
1092 return "16:9 Center";
1093 case HDMI_ACTIVE_ASPECT_PICTURE:
1094 return "Same as Picture";
1095 case HDMI_ACTIVE_ASPECT_4_3:
1096 return "4:3";
1097 case HDMI_ACTIVE_ASPECT_16_9:
1098 return "16:9";
1099 case HDMI_ACTIVE_ASPECT_14_9:
1100 return "14:9";
1101 case HDMI_ACTIVE_ASPECT_4_3_SP_14_9:
1102 return "4:3 SP 14:9";
1103 case HDMI_ACTIVE_ASPECT_16_9_SP_14_9:
1104 return "16:9 SP 14:9";
1105 case HDMI_ACTIVE_ASPECT_16_9_SP_4_3:
1106 return "16:9 SP 4:3";
1107 }
1108 return "Reserved";
1109 }
1110
1111 static const char *
hdmi_extended_colorimetry_get_name(enum hdmi_extended_colorimetry ext_col)1112 hdmi_extended_colorimetry_get_name(enum hdmi_extended_colorimetry ext_col)
1113 {
1114 switch (ext_col) {
1115 case HDMI_EXTENDED_COLORIMETRY_XV_YCC_601:
1116 return "xvYCC 601";
1117 case HDMI_EXTENDED_COLORIMETRY_XV_YCC_709:
1118 return "xvYCC 709";
1119 case HDMI_EXTENDED_COLORIMETRY_S_YCC_601:
1120 return "sYCC 601";
1121 case HDMI_EXTENDED_COLORIMETRY_OPYCC_601:
1122 return "opYCC 601";
1123 case HDMI_EXTENDED_COLORIMETRY_OPRGB:
1124 return "opRGB";
1125 case HDMI_EXTENDED_COLORIMETRY_BT2020_CONST_LUM:
1126 return "BT.2020 Constant Luminance";
1127 case HDMI_EXTENDED_COLORIMETRY_BT2020:
1128 return "BT.2020";
1129 case HDMI_EXTENDED_COLORIMETRY_RESERVED:
1130 return "Reserved";
1131 }
1132 return "Invalid";
1133 }
1134
1135 static const char *
hdmi_quantization_range_get_name(enum hdmi_quantization_range qrange)1136 hdmi_quantization_range_get_name(enum hdmi_quantization_range qrange)
1137 {
1138 switch (qrange) {
1139 case HDMI_QUANTIZATION_RANGE_DEFAULT:
1140 return "Default";
1141 case HDMI_QUANTIZATION_RANGE_LIMITED:
1142 return "Limited";
1143 case HDMI_QUANTIZATION_RANGE_FULL:
1144 return "Full";
1145 case HDMI_QUANTIZATION_RANGE_RESERVED:
1146 return "Reserved";
1147 }
1148 return "Invalid";
1149 }
1150
hdmi_nups_get_name(enum hdmi_nups nups)1151 static const char *hdmi_nups_get_name(enum hdmi_nups nups)
1152 {
1153 switch (nups) {
1154 case HDMI_NUPS_UNKNOWN:
1155 return "Unknown Non-uniform Scaling";
1156 case HDMI_NUPS_HORIZONTAL:
1157 return "Horizontally Scaled";
1158 case HDMI_NUPS_VERTICAL:
1159 return "Vertically Scaled";
1160 case HDMI_NUPS_BOTH:
1161 return "Horizontally and Vertically Scaled";
1162 }
1163 return "Invalid";
1164 }
1165
1166 static const char *
hdmi_ycc_quantization_range_get_name(enum hdmi_ycc_quantization_range qrange)1167 hdmi_ycc_quantization_range_get_name(enum hdmi_ycc_quantization_range qrange)
1168 {
1169 switch (qrange) {
1170 case HDMI_YCC_QUANTIZATION_RANGE_LIMITED:
1171 return "Limited";
1172 case HDMI_YCC_QUANTIZATION_RANGE_FULL:
1173 return "Full";
1174 }
1175 return "Invalid";
1176 }
1177
1178 static const char *
hdmi_content_type_get_name(enum hdmi_content_type content_type)1179 hdmi_content_type_get_name(enum hdmi_content_type content_type)
1180 {
1181 switch (content_type) {
1182 case HDMI_CONTENT_TYPE_GRAPHICS:
1183 return "Graphics";
1184 case HDMI_CONTENT_TYPE_PHOTO:
1185 return "Photo";
1186 case HDMI_CONTENT_TYPE_CINEMA:
1187 return "Cinema";
1188 case HDMI_CONTENT_TYPE_GAME:
1189 return "Game";
1190 }
1191 return "Invalid";
1192 }
1193
hdmi_avi_infoframe_log(const char * level,struct device * dev,const struct hdmi_avi_infoframe * frame)1194 static void hdmi_avi_infoframe_log(const char *level,
1195 struct device *dev,
1196 const struct hdmi_avi_infoframe *frame)
1197 {
1198 hdmi_infoframe_log_header(level, dev,
1199 (const struct hdmi_any_infoframe *)frame);
1200
1201 hdmi_log(" colorspace: %s\n",
1202 hdmi_colorspace_get_name(frame->colorspace));
1203 hdmi_log(" scan mode: %s\n",
1204 hdmi_scan_mode_get_name(frame->scan_mode));
1205 hdmi_log(" colorimetry: %s\n",
1206 hdmi_colorimetry_get_name(frame->colorimetry));
1207 hdmi_log(" picture aspect: %s\n",
1208 hdmi_picture_aspect_get_name(frame->picture_aspect));
1209 hdmi_log(" active aspect: %s\n",
1210 hdmi_active_aspect_get_name(frame->active_aspect));
1211 hdmi_log(" itc: %s\n", frame->itc ? "IT Content" : "No Data");
1212 hdmi_log(" extended colorimetry: %s\n",
1213 hdmi_extended_colorimetry_get_name(frame->extended_colorimetry));
1214 hdmi_log(" quantization range: %s\n",
1215 hdmi_quantization_range_get_name(frame->quantization_range));
1216 hdmi_log(" nups: %s\n", hdmi_nups_get_name(frame->nups));
1217 hdmi_log(" video code: %u\n", frame->video_code);
1218 hdmi_log(" ycc quantization range: %s\n",
1219 hdmi_ycc_quantization_range_get_name(frame->ycc_quantization_range));
1220 hdmi_log(" hdmi content type: %s\n",
1221 hdmi_content_type_get_name(frame->content_type));
1222 hdmi_log(" pixel repeat: %u\n", frame->pixel_repeat);
1223 hdmi_log(" bar top %u, bottom %u, left %u, right %u\n",
1224 frame->top_bar, frame->bottom_bar,
1225 frame->left_bar, frame->right_bar);
1226 }
1227
hdmi_spd_sdi_get_name(enum hdmi_spd_sdi sdi)1228 static const char *hdmi_spd_sdi_get_name(enum hdmi_spd_sdi sdi)
1229 {
1230 if (sdi < 0 || sdi > 0xff)
1231 return "Invalid";
1232 switch (sdi) {
1233 case HDMI_SPD_SDI_UNKNOWN:
1234 return "Unknown";
1235 case HDMI_SPD_SDI_DSTB:
1236 return "Digital STB";
1237 case HDMI_SPD_SDI_DVDP:
1238 return "DVD Player";
1239 case HDMI_SPD_SDI_DVHS:
1240 return "D-VHS";
1241 case HDMI_SPD_SDI_HDDVR:
1242 return "HDD Videorecorder";
1243 case HDMI_SPD_SDI_DVC:
1244 return "DVC";
1245 case HDMI_SPD_SDI_DSC:
1246 return "DSC";
1247 case HDMI_SPD_SDI_VCD:
1248 return "Video CD";
1249 case HDMI_SPD_SDI_GAME:
1250 return "Game";
1251 case HDMI_SPD_SDI_PC:
1252 return "PC General";
1253 case HDMI_SPD_SDI_BD:
1254 return "Blu-Ray Disc (BD)";
1255 case HDMI_SPD_SDI_SACD:
1256 return "Super Audio CD";
1257 case HDMI_SPD_SDI_HDDVD:
1258 return "HD DVD";
1259 case HDMI_SPD_SDI_PMP:
1260 return "PMP";
1261 }
1262 return "Reserved";
1263 }
1264
hdmi_spd_infoframe_log(const char * level,struct device * dev,const struct hdmi_spd_infoframe * frame)1265 static void hdmi_spd_infoframe_log(const char *level,
1266 struct device *dev,
1267 const struct hdmi_spd_infoframe *frame)
1268 {
1269 u8 buf[17];
1270
1271 hdmi_infoframe_log_header(level, dev,
1272 (const struct hdmi_any_infoframe *)frame);
1273
1274 memset(buf, 0, sizeof(buf));
1275
1276 strncpy(buf, frame->vendor, 8);
1277 hdmi_log(" vendor: %s\n", buf);
1278 strncpy(buf, frame->product, 16);
1279 hdmi_log(" product: %s\n", buf);
1280 hdmi_log(" source device information: %s (0x%x)\n",
1281 hdmi_spd_sdi_get_name(frame->sdi), frame->sdi);
1282 }
1283
1284 static const char *
hdmi_audio_coding_type_get_name(enum hdmi_audio_coding_type coding_type)1285 hdmi_audio_coding_type_get_name(enum hdmi_audio_coding_type coding_type)
1286 {
1287 switch (coding_type) {
1288 case HDMI_AUDIO_CODING_TYPE_STREAM:
1289 return "Refer to Stream Header";
1290 case HDMI_AUDIO_CODING_TYPE_PCM:
1291 return "PCM";
1292 case HDMI_AUDIO_CODING_TYPE_AC3:
1293 return "AC-3";
1294 case HDMI_AUDIO_CODING_TYPE_MPEG1:
1295 return "MPEG1";
1296 case HDMI_AUDIO_CODING_TYPE_MP3:
1297 return "MP3";
1298 case HDMI_AUDIO_CODING_TYPE_MPEG2:
1299 return "MPEG2";
1300 case HDMI_AUDIO_CODING_TYPE_AAC_LC:
1301 return "AAC";
1302 case HDMI_AUDIO_CODING_TYPE_DTS:
1303 return "DTS";
1304 case HDMI_AUDIO_CODING_TYPE_ATRAC:
1305 return "ATRAC";
1306 case HDMI_AUDIO_CODING_TYPE_DSD:
1307 return "One Bit Audio";
1308 case HDMI_AUDIO_CODING_TYPE_EAC3:
1309 return "Dolby Digital +";
1310 case HDMI_AUDIO_CODING_TYPE_DTS_HD:
1311 return "DTS-HD";
1312 case HDMI_AUDIO_CODING_TYPE_MLP:
1313 return "MAT (MLP)";
1314 case HDMI_AUDIO_CODING_TYPE_DST:
1315 return "DST";
1316 case HDMI_AUDIO_CODING_TYPE_WMA_PRO:
1317 return "WMA PRO";
1318 case HDMI_AUDIO_CODING_TYPE_CXT:
1319 return "Refer to CXT";
1320 }
1321 return "Invalid";
1322 }
1323
1324 static const char *
hdmi_audio_sample_size_get_name(enum hdmi_audio_sample_size sample_size)1325 hdmi_audio_sample_size_get_name(enum hdmi_audio_sample_size sample_size)
1326 {
1327 switch (sample_size) {
1328 case HDMI_AUDIO_SAMPLE_SIZE_STREAM:
1329 return "Refer to Stream Header";
1330 case HDMI_AUDIO_SAMPLE_SIZE_16:
1331 return "16 bit";
1332 case HDMI_AUDIO_SAMPLE_SIZE_20:
1333 return "20 bit";
1334 case HDMI_AUDIO_SAMPLE_SIZE_24:
1335 return "24 bit";
1336 }
1337 return "Invalid";
1338 }
1339
1340 static const char *
hdmi_audio_sample_frequency_get_name(enum hdmi_audio_sample_frequency freq)1341 hdmi_audio_sample_frequency_get_name(enum hdmi_audio_sample_frequency freq)
1342 {
1343 switch (freq) {
1344 case HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM:
1345 return "Refer to Stream Header";
1346 case HDMI_AUDIO_SAMPLE_FREQUENCY_32000:
1347 return "32 kHz";
1348 case HDMI_AUDIO_SAMPLE_FREQUENCY_44100:
1349 return "44.1 kHz (CD)";
1350 case HDMI_AUDIO_SAMPLE_FREQUENCY_48000:
1351 return "48 kHz";
1352 case HDMI_AUDIO_SAMPLE_FREQUENCY_88200:
1353 return "88.2 kHz";
1354 case HDMI_AUDIO_SAMPLE_FREQUENCY_96000:
1355 return "96 kHz";
1356 case HDMI_AUDIO_SAMPLE_FREQUENCY_176400:
1357 return "176.4 kHz";
1358 case HDMI_AUDIO_SAMPLE_FREQUENCY_192000:
1359 return "192 kHz";
1360 }
1361 return "Invalid";
1362 }
1363
1364 static const char *
hdmi_audio_coding_type_ext_get_name(enum hdmi_audio_coding_type_ext ctx)1365 hdmi_audio_coding_type_ext_get_name(enum hdmi_audio_coding_type_ext ctx)
1366 {
1367 if (ctx < 0 || ctx > 0x1f)
1368 return "Invalid";
1369
1370 switch (ctx) {
1371 case HDMI_AUDIO_CODING_TYPE_EXT_CT:
1372 return "Refer to CT";
1373 case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC:
1374 return "HE AAC";
1375 case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC_V2:
1376 return "HE AAC v2";
1377 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG_SURROUND:
1378 return "MPEG SURROUND";
1379 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC:
1380 return "MPEG-4 HE AAC";
1381 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_V2:
1382 return "MPEG-4 HE AAC v2";
1383 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC:
1384 return "MPEG-4 AAC LC";
1385 case HDMI_AUDIO_CODING_TYPE_EXT_DRA:
1386 return "DRA";
1387 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_SURROUND:
1388 return "MPEG-4 HE AAC + MPEG Surround";
1389 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC_SURROUND:
1390 return "MPEG-4 AAC LC + MPEG Surround";
1391 }
1392 return "Reserved";
1393 }
1394
hdmi_audio_infoframe_log(const char * level,struct device * dev,const struct hdmi_audio_infoframe * frame)1395 static void hdmi_audio_infoframe_log(const char *level,
1396 struct device *dev,
1397 const struct hdmi_audio_infoframe *frame)
1398 {
1399 hdmi_infoframe_log_header(level, dev,
1400 (const struct hdmi_any_infoframe *)frame);
1401
1402 if (frame->channels)
1403 hdmi_log(" channels: %u\n", frame->channels - 1);
1404 else
1405 hdmi_log(" channels: Refer to stream header\n");
1406 hdmi_log(" coding type: %s\n",
1407 hdmi_audio_coding_type_get_name(frame->coding_type));
1408 hdmi_log(" sample size: %s\n",
1409 hdmi_audio_sample_size_get_name(frame->sample_size));
1410 hdmi_log(" sample frequency: %s\n",
1411 hdmi_audio_sample_frequency_get_name(frame->sample_frequency));
1412 hdmi_log(" coding type ext: %s\n",
1413 hdmi_audio_coding_type_ext_get_name(frame->coding_type_ext));
1414 hdmi_log(" channel allocation: 0x%x\n",
1415 frame->channel_allocation);
1416 hdmi_log(" level shift value: %u dB\n",
1417 frame->level_shift_value);
1418 hdmi_log(" downmix inhibit: %s\n",
1419 frame->downmix_inhibit ? "Yes" : "No");
1420 }
1421
hdmi_drm_infoframe_log(const char * level,struct device * dev,const struct hdmi_drm_infoframe * frame)1422 static void hdmi_drm_infoframe_log(const char *level,
1423 struct device *dev,
1424 const struct hdmi_drm_infoframe *frame)
1425 {
1426 int i;
1427
1428 hdmi_infoframe_log_header(level, dev,
1429 (struct hdmi_any_infoframe *)frame);
1430 hdmi_log("length: %d\n", frame->length);
1431 hdmi_log("metadata type: %d\n", frame->metadata_type);
1432 hdmi_log("eotf: %d\n", frame->eotf);
1433 for (i = 0; i < 3; i++) {
1434 hdmi_log("x[%d]: %d\n", i, frame->display_primaries[i].x);
1435 hdmi_log("y[%d]: %d\n", i, frame->display_primaries[i].y);
1436 }
1437
1438 hdmi_log("white point x: %d\n", frame->white_point.x);
1439 hdmi_log("white point y: %d\n", frame->white_point.y);
1440
1441 hdmi_log("max_display_mastering_luminance: %d\n",
1442 frame->max_display_mastering_luminance);
1443 hdmi_log("min_display_mastering_luminance: %d\n",
1444 frame->min_display_mastering_luminance);
1445
1446 hdmi_log("max_cll: %d\n", frame->max_cll);
1447 hdmi_log("max_fall: %d\n", frame->max_fall);
1448 }
1449
1450 static const char *
hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct)1451 hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct)
1452 {
1453 if (s3d_struct < 0 || s3d_struct > 0xf)
1454 return "Invalid";
1455
1456 switch (s3d_struct) {
1457 case HDMI_3D_STRUCTURE_FRAME_PACKING:
1458 return "Frame Packing";
1459 case HDMI_3D_STRUCTURE_FIELD_ALTERNATIVE:
1460 return "Field Alternative";
1461 case HDMI_3D_STRUCTURE_LINE_ALTERNATIVE:
1462 return "Line Alternative";
1463 case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_FULL:
1464 return "Side-by-side (Full)";
1465 case HDMI_3D_STRUCTURE_L_DEPTH:
1466 return "L + Depth";
1467 case HDMI_3D_STRUCTURE_L_DEPTH_GFX_GFX_DEPTH:
1468 return "L + Depth + Graphics + Graphics-depth";
1469 case HDMI_3D_STRUCTURE_TOP_AND_BOTTOM:
1470 return "Top-and-Bottom";
1471 case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF:
1472 return "Side-by-side (Half)";
1473 default:
1474 break;
1475 }
1476 return "Reserved";
1477 }
1478
1479 static void
hdmi_vendor_any_infoframe_log(const char * level,struct device * dev,const union hdmi_vendor_any_infoframe * frame)1480 hdmi_vendor_any_infoframe_log(const char *level,
1481 struct device *dev,
1482 const union hdmi_vendor_any_infoframe *frame)
1483 {
1484 const struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
1485
1486 hdmi_infoframe_log_header(level, dev,
1487 (const struct hdmi_any_infoframe *)frame);
1488
1489 if (frame->any.oui != HDMI_IEEE_OUI) {
1490 hdmi_log(" not a HDMI vendor infoframe\n");
1491 return;
1492 }
1493 if (hvf->vic == 0 && hvf->s3d_struct == HDMI_3D_STRUCTURE_INVALID) {
1494 hdmi_log(" empty frame\n");
1495 return;
1496 }
1497
1498 if (hvf->vic)
1499 hdmi_log(" HDMI VIC: %u\n", hvf->vic);
1500 if (hvf->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
1501 hdmi_log(" 3D structure: %s\n",
1502 hdmi_3d_structure_get_name(hvf->s3d_struct));
1503 if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
1504 hdmi_log(" 3D extension data: %d\n",
1505 hvf->s3d_ext_data);
1506 }
1507 }
1508
1509 /**
1510 * hdmi_infoframe_log() - log info of HDMI infoframe
1511 * @level: logging level
1512 * @dev: device
1513 * @frame: HDMI infoframe
1514 */
hdmi_infoframe_log(const char * level,struct device * dev,const union hdmi_infoframe * frame)1515 void hdmi_infoframe_log(const char *level,
1516 struct device *dev,
1517 const union hdmi_infoframe *frame)
1518 {
1519 switch (frame->any.type) {
1520 case HDMI_INFOFRAME_TYPE_AVI:
1521 hdmi_avi_infoframe_log(level, dev, &frame->avi);
1522 break;
1523 case HDMI_INFOFRAME_TYPE_SPD:
1524 hdmi_spd_infoframe_log(level, dev, &frame->spd);
1525 break;
1526 case HDMI_INFOFRAME_TYPE_AUDIO:
1527 hdmi_audio_infoframe_log(level, dev, &frame->audio);
1528 break;
1529 case HDMI_INFOFRAME_TYPE_VENDOR:
1530 hdmi_vendor_any_infoframe_log(level, dev, &frame->vendor);
1531 break;
1532 case HDMI_INFOFRAME_TYPE_DRM:
1533 hdmi_drm_infoframe_log(level, dev, &frame->drm);
1534 break;
1535 }
1536 }
1537 EXPORT_SYMBOL(hdmi_infoframe_log);
1538
1539 /**
1540 * hdmi_avi_infoframe_unpack() - unpack binary buffer to a HDMI AVI infoframe
1541 * @frame: HDMI AVI infoframe
1542 * @buffer: source buffer
1543 * @size: size of buffer
1544 *
1545 * Unpacks the information contained in binary @buffer into a structured
1546 * @frame of the HDMI Auxiliary Video (AVI) information frame.
1547 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1548 * specification.
1549 *
1550 * Returns 0 on success or a negative error code on failure.
1551 */
hdmi_avi_infoframe_unpack(struct hdmi_avi_infoframe * frame,const void * buffer,size_t size)1552 static int hdmi_avi_infoframe_unpack(struct hdmi_avi_infoframe *frame,
1553 const void *buffer, size_t size)
1554 {
1555 const u8 *ptr = buffer;
1556 int ret;
1557
1558 if (size < HDMI_INFOFRAME_SIZE(AVI))
1559 return -EINVAL;
1560
1561 if (ptr[0] != HDMI_INFOFRAME_TYPE_AVI ||
1562 ptr[1] != 2 ||
1563 ptr[2] != HDMI_AVI_INFOFRAME_SIZE)
1564 return -EINVAL;
1565
1566 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AVI)) != 0)
1567 return -EINVAL;
1568
1569 ret = hdmi_avi_infoframe_init(frame);
1570 if (ret)
1571 return ret;
1572
1573 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1574
1575 frame->colorspace = (ptr[0] >> 5) & 0x3;
1576 if (ptr[0] & 0x10)
1577 frame->active_aspect = ptr[1] & 0xf;
1578 if (ptr[0] & 0x8) {
1579 frame->top_bar = (ptr[5] << 8) + ptr[6];
1580 frame->bottom_bar = (ptr[7] << 8) + ptr[8];
1581 }
1582 if (ptr[0] & 0x4) {
1583 frame->left_bar = (ptr[9] << 8) + ptr[10];
1584 frame->right_bar = (ptr[11] << 8) + ptr[12];
1585 }
1586 frame->scan_mode = ptr[0] & 0x3;
1587
1588 frame->colorimetry = (ptr[1] >> 6) & 0x3;
1589 frame->picture_aspect = (ptr[1] >> 4) & 0x3;
1590 frame->active_aspect = ptr[1] & 0xf;
1591
1592 frame->itc = ptr[2] & 0x80 ? true : false;
1593 frame->extended_colorimetry = (ptr[2] >> 4) & 0x7;
1594 frame->quantization_range = (ptr[2] >> 2) & 0x3;
1595 frame->nups = ptr[2] & 0x3;
1596
1597 frame->video_code = ptr[3] & 0x7f;
1598 frame->ycc_quantization_range = (ptr[4] >> 6) & 0x3;
1599 frame->content_type = (ptr[4] >> 4) & 0x3;
1600
1601 frame->pixel_repeat = ptr[4] & 0xf;
1602
1603 return 0;
1604 }
1605
1606 /**
1607 * hdmi_spd_infoframe_unpack() - unpack binary buffer to a HDMI SPD infoframe
1608 * @frame: HDMI SPD infoframe
1609 * @buffer: source buffer
1610 * @size: size of buffer
1611 *
1612 * Unpacks the information contained in binary @buffer into a structured
1613 * @frame of the HDMI Source Product Description (SPD) information frame.
1614 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1615 * specification.
1616 *
1617 * Returns 0 on success or a negative error code on failure.
1618 */
hdmi_spd_infoframe_unpack(struct hdmi_spd_infoframe * frame,const void * buffer,size_t size)1619 static int hdmi_spd_infoframe_unpack(struct hdmi_spd_infoframe *frame,
1620 const void *buffer, size_t size)
1621 {
1622 const u8 *ptr = buffer;
1623 int ret;
1624
1625 if (size < HDMI_INFOFRAME_SIZE(SPD))
1626 return -EINVAL;
1627
1628 if (ptr[0] != HDMI_INFOFRAME_TYPE_SPD ||
1629 ptr[1] != 1 ||
1630 ptr[2] != HDMI_SPD_INFOFRAME_SIZE) {
1631 return -EINVAL;
1632 }
1633
1634 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(SPD)) != 0)
1635 return -EINVAL;
1636
1637 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1638
1639 ret = hdmi_spd_infoframe_init(frame, ptr, ptr + 8);
1640 if (ret)
1641 return ret;
1642
1643 frame->sdi = ptr[24];
1644
1645 return 0;
1646 }
1647
1648 /**
1649 * hdmi_audio_infoframe_unpack() - unpack binary buffer to a HDMI AUDIO infoframe
1650 * @frame: HDMI Audio infoframe
1651 * @buffer: source buffer
1652 * @size: size of buffer
1653 *
1654 * Unpacks the information contained in binary @buffer into a structured
1655 * @frame of the HDMI Audio information frame.
1656 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1657 * specification.
1658 *
1659 * Returns 0 on success or a negative error code on failure.
1660 */
hdmi_audio_infoframe_unpack(struct hdmi_audio_infoframe * frame,const void * buffer,size_t size)1661 static int hdmi_audio_infoframe_unpack(struct hdmi_audio_infoframe *frame,
1662 const void *buffer, size_t size)
1663 {
1664 const u8 *ptr = buffer;
1665 int ret;
1666
1667 if (size < HDMI_INFOFRAME_SIZE(AUDIO))
1668 return -EINVAL;
1669
1670 if (ptr[0] != HDMI_INFOFRAME_TYPE_AUDIO ||
1671 ptr[1] != 1 ||
1672 ptr[2] != HDMI_AUDIO_INFOFRAME_SIZE) {
1673 return -EINVAL;
1674 }
1675
1676 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AUDIO)) != 0)
1677 return -EINVAL;
1678
1679 ret = hdmi_audio_infoframe_init(frame);
1680 if (ret)
1681 return ret;
1682
1683 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1684
1685 frame->channels = ptr[0] & 0x7;
1686 frame->coding_type = (ptr[0] >> 4) & 0xf;
1687 frame->sample_size = ptr[1] & 0x3;
1688 frame->sample_frequency = (ptr[1] >> 2) & 0x7;
1689 frame->coding_type_ext = ptr[2] & 0x1f;
1690 frame->channel_allocation = ptr[3];
1691 frame->level_shift_value = (ptr[4] >> 3) & 0xf;
1692 frame->downmix_inhibit = ptr[4] & 0x80 ? true : false;
1693
1694 return 0;
1695 }
1696
1697 /**
1698 * hdmi_vendor_infoframe_unpack() - unpack binary buffer to a HDMI vendor infoframe
1699 * @frame: HDMI Vendor infoframe
1700 * @buffer: source buffer
1701 * @size: size of buffer
1702 *
1703 * Unpacks the information contained in binary @buffer into a structured
1704 * @frame of the HDMI Vendor information frame.
1705 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1706 * specification.
1707 *
1708 * Returns 0 on success or a negative error code on failure.
1709 */
1710 static int
hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe * frame,const void * buffer,size_t size)1711 hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame,
1712 const void *buffer, size_t size)
1713 {
1714 const u8 *ptr = buffer;
1715 size_t length;
1716 int ret;
1717 u8 hdmi_video_format;
1718 struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
1719
1720 if (size < HDMI_INFOFRAME_HEADER_SIZE)
1721 return -EINVAL;
1722
1723 if (ptr[0] != HDMI_INFOFRAME_TYPE_VENDOR ||
1724 ptr[1] != 1 ||
1725 (ptr[2] != 4 && ptr[2] != 5 && ptr[2] != 6))
1726 return -EINVAL;
1727
1728 length = ptr[2];
1729
1730 if (size < HDMI_INFOFRAME_HEADER_SIZE + length)
1731 return -EINVAL;
1732
1733 if (hdmi_infoframe_checksum(buffer,
1734 HDMI_INFOFRAME_HEADER_SIZE + length) != 0)
1735 return -EINVAL;
1736
1737 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1738
1739 /* HDMI OUI */
1740 if ((ptr[0] != 0x03) ||
1741 (ptr[1] != 0x0c) ||
1742 (ptr[2] != 0x00))
1743 return -EINVAL;
1744
1745 hdmi_video_format = ptr[3] >> 5;
1746
1747 if (hdmi_video_format > 0x2)
1748 return -EINVAL;
1749
1750 ret = hdmi_vendor_infoframe_init(hvf);
1751 if (ret)
1752 return ret;
1753
1754 hvf->length = length;
1755
1756 if (hdmi_video_format == 0x2) {
1757 if (length != 5 && length != 6)
1758 return -EINVAL;
1759 hvf->s3d_struct = ptr[4] >> 4;
1760 if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF) {
1761 if (length != 6)
1762 return -EINVAL;
1763 hvf->s3d_ext_data = ptr[5] >> 4;
1764 }
1765 } else if (hdmi_video_format == 0x1) {
1766 if (length != 5)
1767 return -EINVAL;
1768 hvf->vic = ptr[4];
1769 } else {
1770 if (length != 4)
1771 return -EINVAL;
1772 }
1773
1774 return 0;
1775 }
1776
1777 /**
1778 * hdmi_drm_infoframe_unpack() - unpack binary buffer to a HDMI DRM infoframe
1779 * @frame: HDMI DRM infoframe
1780 * @buffer: source buffer
1781 * @size: size of buffer
1782 *
1783 * Unpacks the information contained in binary @buffer into a structured
1784 * @frame of the HDMI Dynamic Range and Mastering (DRM) information frame.
1785 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1786 * specification.
1787 *
1788 * Returns 0 on success or a negative error code on failure.
1789 */
hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe * frame,const void * buffer,size_t size)1790 static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
1791 const void *buffer, size_t size)
1792 {
1793 const u8 *ptr = buffer;
1794 const u8 *temp;
1795 u8 x_lsb, x_msb;
1796 u8 y_lsb, y_msb;
1797 int ret;
1798 int i;
1799
1800 if (size < HDMI_INFOFRAME_SIZE(DRM))
1801 return -EINVAL;
1802
1803 if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
1804 ptr[1] != 1 ||
1805 ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
1806 return -EINVAL;
1807
1808 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(DRM)) != 0)
1809 return -EINVAL;
1810
1811 ret = hdmi_drm_infoframe_init(frame);
1812 if (ret)
1813 return ret;
1814
1815 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1816
1817 frame->eotf = ptr[0] & 0x7;
1818 frame->metadata_type = ptr[1] & 0x7;
1819
1820 temp = ptr + 2;
1821 for (i = 0; i < 3; i++) {
1822 x_lsb = *temp++;
1823 x_msb = *temp++;
1824 frame->display_primaries[i].x = (x_msb << 8) | x_lsb;
1825 y_lsb = *temp++;
1826 y_msb = *temp++;
1827 frame->display_primaries[i].y = (y_msb << 8) | y_lsb;
1828 }
1829
1830 frame->white_point.x = (ptr[15] << 8) | ptr[14];
1831 frame->white_point.y = (ptr[17] << 8) | ptr[16];
1832
1833 frame->max_display_mastering_luminance = (ptr[19] << 8) | ptr[18];
1834 frame->min_display_mastering_luminance = (ptr[21] << 8) | ptr[20];
1835 frame->max_cll = (ptr[23] << 8) | ptr[22];
1836 frame->max_fall = (ptr[25] << 8) | ptr[24];
1837
1838 return 0;
1839 }
1840
1841 /**
1842 * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe
1843 * @frame: HDMI infoframe
1844 * @buffer: source buffer
1845 * @size: size of buffer
1846 *
1847 * Unpacks the information contained in binary buffer @buffer into a structured
1848 * @frame of a HDMI infoframe.
1849 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1850 * specification.
1851 *
1852 * Returns 0 on success or a negative error code on failure.
1853 */
hdmi_infoframe_unpack(union hdmi_infoframe * frame,const void * buffer,size_t size)1854 int hdmi_infoframe_unpack(union hdmi_infoframe *frame,
1855 const void *buffer, size_t size)
1856 {
1857 int ret;
1858 const u8 *ptr = buffer;
1859
1860 if (size < HDMI_INFOFRAME_HEADER_SIZE)
1861 return -EINVAL;
1862
1863 switch (ptr[0]) {
1864 case HDMI_INFOFRAME_TYPE_AVI:
1865 ret = hdmi_avi_infoframe_unpack(&frame->avi, buffer, size);
1866 break;
1867 case HDMI_INFOFRAME_TYPE_DRM:
1868 ret = hdmi_drm_infoframe_unpack(&frame->drm, buffer, size);
1869 break;
1870 case HDMI_INFOFRAME_TYPE_SPD:
1871 ret = hdmi_spd_infoframe_unpack(&frame->spd, buffer, size);
1872 break;
1873 case HDMI_INFOFRAME_TYPE_AUDIO:
1874 ret = hdmi_audio_infoframe_unpack(&frame->audio, buffer, size);
1875 break;
1876 case HDMI_INFOFRAME_TYPE_VENDOR:
1877 ret = hdmi_vendor_any_infoframe_unpack(&frame->vendor, buffer, size);
1878 break;
1879 default:
1880 ret = -EINVAL;
1881 break;
1882 }
1883
1884 return ret;
1885 }
1886 EXPORT_SYMBOL(hdmi_infoframe_unpack);
1887
