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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 <drm/display/drm_dp.h>
25#include <linux/bitops.h>
26#include <linux/bug.h>
27#include <linux/errno.h>
28#include <linux/export.h>
29#include <linux/hdmi.h>
30#include <linux/string.h>
31#include <linux/device.h>
32
33#define hdmi_log(fmt, ...) dev_printk(level, dev, fmt, ##__VA_ARGS__)
34
35static u8 hdmi_infoframe_checksum(const u8 *ptr, size_t size)
36{
37 u8 csum = 0;
38 size_t i;
39
40 /* compute checksum */
41 for (i = 0; i < size; i++)
42 csum += ptr[i];
43
44 return 256 - csum;
45}
46
47static void hdmi_infoframe_set_checksum(void *buffer, size_t size)
48{
49 u8 *ptr = buffer;
50
51 ptr[3] = hdmi_infoframe_checksum(buffer, size);
52}
53
54/**
55 * hdmi_avi_infoframe_init() - initialize an HDMI AVI infoframe
56 * @frame: HDMI AVI infoframe
57 */
58void hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame)
59{
60 memset(frame, 0, sizeof(*frame));
61
62 frame->type = HDMI_INFOFRAME_TYPE_AVI;
63 frame->version = 2;
64 frame->length = HDMI_AVI_INFOFRAME_SIZE;
65}
66EXPORT_SYMBOL(hdmi_avi_infoframe_init);
67
68static int hdmi_avi_infoframe_check_only(const struct hdmi_avi_infoframe *frame)
69{
70 if (frame->type != HDMI_INFOFRAME_TYPE_AVI ||
71 frame->version != 2 ||
72 frame->length != HDMI_AVI_INFOFRAME_SIZE)
73 return -EINVAL;
74
75 if (frame->picture_aspect > HDMI_PICTURE_ASPECT_16_9)
76 return -EINVAL;
77
78 return 0;
79}
80
81/**
82 * hdmi_avi_infoframe_check() - check a HDMI AVI infoframe
83 * @frame: HDMI AVI infoframe
84 *
85 * Validates that the infoframe is consistent and updates derived fields
86 * (eg. length) based on other fields.
87 *
88 * Returns 0 on success or a negative error code on failure.
89 */
90int hdmi_avi_infoframe_check(struct hdmi_avi_infoframe *frame)
91{
92 return hdmi_avi_infoframe_check_only(frame);
93}
94EXPORT_SYMBOL(hdmi_avi_infoframe_check);
95
96/**
97 * hdmi_avi_infoframe_pack_only() - write HDMI AVI infoframe to binary buffer
98 * @frame: HDMI AVI infoframe
99 * @buffer: destination buffer
100 * @size: size of buffer
101 *
102 * Packs the information contained in the @frame structure into a binary
103 * representation that can be written into the corresponding controller
104 * registers. Also computes the checksum as required by section 5.3.5 of
105 * the HDMI 1.4 specification.
106 *
107 * Returns the number of bytes packed into the binary buffer or a negative
108 * error code on failure.
109 */
110ssize_t hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe *frame,
111 void *buffer, size_t size)
112{
113 u8 *ptr = buffer;
114 size_t length;
115 int ret;
116
117 ret = hdmi_avi_infoframe_check_only(frame);
118 if (ret)
119 return ret;
120
121 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
122
123 if (size < length)
124 return -ENOSPC;
125
126 memset(buffer, 0, size);
127
128 ptr[0] = frame->type;
129 ptr[1] = frame->version;
130 ptr[2] = frame->length;
131 ptr[3] = 0; /* checksum */
132
133 /* start infoframe payload */
134 ptr += HDMI_INFOFRAME_HEADER_SIZE;
135
136 ptr[0] = ((frame->colorspace & 0x3) << 5) | (frame->scan_mode & 0x3);
137
138 /*
139 * Data byte 1, bit 4 has to be set if we provide the active format
140 * aspect ratio
141 */
142 if (frame->active_aspect & 0xf)
143 ptr[0] |= BIT(4);
144
145 /* Bit 3 and 2 indicate if we transmit horizontal/vertical bar data */
146 if (frame->top_bar || frame->bottom_bar)
147 ptr[0] |= BIT(3);
148
149 if (frame->left_bar || frame->right_bar)
150 ptr[0] |= BIT(2);
151
152 ptr[1] = ((frame->colorimetry & 0x3) << 6) |
153 ((frame->picture_aspect & 0x3) << 4) |
154 (frame->active_aspect & 0xf);
155
156 ptr[2] = ((frame->extended_colorimetry & 0x7) << 4) |
157 ((frame->quantization_range & 0x3) << 2) |
158 (frame->nups & 0x3);
159
160 if (frame->itc)
161 ptr[2] |= BIT(7);
162
163 ptr[3] = frame->video_code & 0x7f;
164
165 ptr[4] = ((frame->ycc_quantization_range & 0x3) << 6) |
166 ((frame->content_type & 0x3) << 4) |
167 (frame->pixel_repeat & 0xf);
168
169 ptr[5] = frame->top_bar & 0xff;
170 ptr[6] = (frame->top_bar >> 8) & 0xff;
171 ptr[7] = frame->bottom_bar & 0xff;
172 ptr[8] = (frame->bottom_bar >> 8) & 0xff;
173 ptr[9] = frame->left_bar & 0xff;
174 ptr[10] = (frame->left_bar >> 8) & 0xff;
175 ptr[11] = frame->right_bar & 0xff;
176 ptr[12] = (frame->right_bar >> 8) & 0xff;
177
178 hdmi_infoframe_set_checksum(buffer, length);
179
180 return length;
181}
182EXPORT_SYMBOL(hdmi_avi_infoframe_pack_only);
183
184/**
185 * hdmi_avi_infoframe_pack() - check a HDMI AVI infoframe,
186 * and write it to binary buffer
187 * @frame: HDMI AVI infoframe
188 * @buffer: destination buffer
189 * @size: size of buffer
190 *
191 * Validates that the infoframe is consistent and updates derived fields
192 * (eg. length) based on other fields, after which it packs the information
193 * contained in the @frame structure into a binary representation that
194 * can be written into the corresponding controller registers. This function
195 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
196 * specification.
197 *
198 * Returns the number of bytes packed into the binary buffer or a negative
199 * error code on failure.
200 */
201ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame,
202 void *buffer, size_t size)
203{
204 int ret;
205
206 ret = hdmi_avi_infoframe_check(frame);
207 if (ret)
208 return ret;
209
210 return hdmi_avi_infoframe_pack_only(frame, buffer, size);
211}
212EXPORT_SYMBOL(hdmi_avi_infoframe_pack);
213
214/**
215 * hdmi_spd_infoframe_init() - initialize an HDMI SPD infoframe
216 * @frame: HDMI SPD infoframe
217 * @vendor: vendor string
218 * @product: product string
219 *
220 * Returns 0 on success or a negative error code on failure.
221 */
222int hdmi_spd_infoframe_init(struct hdmi_spd_infoframe *frame,
223 const char *vendor, const char *product)
224{
225 size_t len;
226
227 memset(frame, 0, sizeof(*frame));
228
229 frame->type = HDMI_INFOFRAME_TYPE_SPD;
230 frame->version = 1;
231 frame->length = HDMI_SPD_INFOFRAME_SIZE;
232
233 len = strlen(vendor);
234 memcpy(frame->vendor, vendor, min(len, sizeof(frame->vendor)));
235 len = strlen(product);
236 memcpy(frame->product, product, min(len, sizeof(frame->product)));
237
238 return 0;
239}
240EXPORT_SYMBOL(hdmi_spd_infoframe_init);
241
242static int hdmi_spd_infoframe_check_only(const struct hdmi_spd_infoframe *frame)
243{
244 if (frame->type != HDMI_INFOFRAME_TYPE_SPD ||
245 frame->version != 1 ||
246 frame->length != HDMI_SPD_INFOFRAME_SIZE)
247 return -EINVAL;
248
249 return 0;
250}
251
252/**
253 * hdmi_spd_infoframe_check() - check a HDMI SPD infoframe
254 * @frame: HDMI SPD infoframe
255 *
256 * Validates that the infoframe is consistent and updates derived fields
257 * (eg. length) based on other fields.
258 *
259 * Returns 0 on success or a negative error code on failure.
260 */
261int hdmi_spd_infoframe_check(struct hdmi_spd_infoframe *frame)
262{
263 return hdmi_spd_infoframe_check_only(frame);
264}
265EXPORT_SYMBOL(hdmi_spd_infoframe_check);
266
267/**
268 * hdmi_spd_infoframe_pack_only() - write HDMI SPD infoframe to binary buffer
269 * @frame: HDMI SPD infoframe
270 * @buffer: destination buffer
271 * @size: size of buffer
272 *
273 * Packs the information contained in the @frame structure into a binary
274 * representation that can be written into the corresponding controller
275 * registers. Also computes the checksum as required by section 5.3.5 of
276 * the HDMI 1.4 specification.
277 *
278 * Returns the number of bytes packed into the binary buffer or a negative
279 * error code on failure.
280 */
281ssize_t hdmi_spd_infoframe_pack_only(const struct hdmi_spd_infoframe *frame,
282 void *buffer, size_t size)
283{
284 u8 *ptr = buffer;
285 size_t length;
286 int ret;
287
288 ret = hdmi_spd_infoframe_check_only(frame);
289 if (ret)
290 return ret;
291
292 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
293
294 if (size < length)
295 return -ENOSPC;
296
297 memset(buffer, 0, size);
298
299 ptr[0] = frame->type;
300 ptr[1] = frame->version;
301 ptr[2] = frame->length;
302 ptr[3] = 0; /* checksum */
303
304 /* start infoframe payload */
305 ptr += HDMI_INFOFRAME_HEADER_SIZE;
306
307 memcpy(ptr, frame->vendor, sizeof(frame->vendor));
308 memcpy(ptr + 8, frame->product, sizeof(frame->product));
309
310 ptr[24] = frame->sdi;
311
312 hdmi_infoframe_set_checksum(buffer, length);
313
314 return length;
315}
316EXPORT_SYMBOL(hdmi_spd_infoframe_pack_only);
317
318/**
319 * hdmi_spd_infoframe_pack() - check a HDMI SPD infoframe,
320 * and write it to binary buffer
321 * @frame: HDMI SPD infoframe
322 * @buffer: destination buffer
323 * @size: size of buffer
324 *
325 * Validates that the infoframe is consistent and updates derived fields
326 * (eg. length) based on other fields, after which it packs the information
327 * contained in the @frame structure into a binary representation that
328 * can be written into the corresponding controller registers. This function
329 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
330 * specification.
331 *
332 * Returns the number of bytes packed into the binary buffer or a negative
333 * error code on failure.
334 */
335ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame,
336 void *buffer, size_t size)
337{
338 int ret;
339
340 ret = hdmi_spd_infoframe_check(frame);
341 if (ret)
342 return ret;
343
344 return hdmi_spd_infoframe_pack_only(frame, buffer, size);
345}
346EXPORT_SYMBOL(hdmi_spd_infoframe_pack);
347
348/**
349 * hdmi_audio_infoframe_init() - initialize an HDMI audio infoframe
350 * @frame: HDMI audio infoframe
351 *
352 * Returns 0 on success or a negative error code on failure.
353 */
354int hdmi_audio_infoframe_init(struct hdmi_audio_infoframe *frame)
355{
356 memset(frame, 0, sizeof(*frame));
357
358 frame->type = HDMI_INFOFRAME_TYPE_AUDIO;
359 frame->version = 1;
360 frame->length = HDMI_AUDIO_INFOFRAME_SIZE;
361
362 return 0;
363}
364EXPORT_SYMBOL(hdmi_audio_infoframe_init);
365
366static int hdmi_audio_infoframe_check_only(const struct hdmi_audio_infoframe *frame)
367{
368 if (frame->type != HDMI_INFOFRAME_TYPE_AUDIO ||
369 frame->version != 1 ||
370 frame->length != HDMI_AUDIO_INFOFRAME_SIZE)
371 return -EINVAL;
372
373 return 0;
374}
375
376/**
377 * hdmi_audio_infoframe_check() - check a HDMI audio infoframe
378 * @frame: HDMI audio infoframe
379 *
380 * Validates that the infoframe is consistent and updates derived fields
381 * (eg. length) based on other fields.
382 *
383 * Returns 0 on success or a negative error code on failure.
384 */
385int hdmi_audio_infoframe_check(const struct hdmi_audio_infoframe *frame)
386{
387 return hdmi_audio_infoframe_check_only(frame);
388}
389EXPORT_SYMBOL(hdmi_audio_infoframe_check);
390
391static void
392hdmi_audio_infoframe_pack_payload(const struct hdmi_audio_infoframe *frame,
393 u8 *buffer)
394{
395 u8 channels;
396
397 if (frame->channels >= 2)
398 channels = frame->channels - 1;
399 else
400 channels = 0;
401
402 buffer[0] = ((frame->coding_type & 0xf) << 4) | (channels & 0x7);
403 buffer[1] = ((frame->sample_frequency & 0x7) << 2) |
404 (frame->sample_size & 0x3);
405 buffer[2] = frame->coding_type_ext & 0x1f;
406 buffer[3] = frame->channel_allocation;
407 buffer[4] = (frame->level_shift_value & 0xf) << 3;
408
409 if (frame->downmix_inhibit)
410 buffer[4] |= BIT(7);
411}
412
413/**
414 * hdmi_audio_infoframe_pack_only() - write HDMI audio infoframe to binary buffer
415 * @frame: HDMI audio infoframe
416 * @buffer: destination buffer
417 * @size: size of buffer
418 *
419 * Packs the information contained in the @frame structure into a binary
420 * representation that can be written into the corresponding controller
421 * registers. Also computes the checksum as required by section 5.3.5 of
422 * the HDMI 1.4 specification.
423 *
424 * Returns the number of bytes packed into the binary buffer or a negative
425 * error code on failure.
426 */
427ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame,
428 void *buffer, size_t size)
429{
430 u8 *ptr = buffer;
431 size_t length;
432 int ret;
433
434 ret = hdmi_audio_infoframe_check_only(frame);
435 if (ret)
436 return ret;
437
438 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
439
440 if (size < length)
441 return -ENOSPC;
442
443 memset(buffer, 0, size);
444
445 ptr[0] = frame->type;
446 ptr[1] = frame->version;
447 ptr[2] = frame->length;
448 ptr[3] = 0; /* checksum */
449
450 hdmi_audio_infoframe_pack_payload(frame,
451 ptr + HDMI_INFOFRAME_HEADER_SIZE);
452
453 hdmi_infoframe_set_checksum(buffer, length);
454
455 return length;
456}
457EXPORT_SYMBOL(hdmi_audio_infoframe_pack_only);
458
459/**
460 * hdmi_audio_infoframe_pack() - check a HDMI Audio infoframe,
461 * and write it to binary buffer
462 * @frame: HDMI Audio infoframe
463 * @buffer: destination buffer
464 * @size: size of buffer
465 *
466 * Validates that the infoframe is consistent and updates derived fields
467 * (eg. length) based on other fields, after which it packs the information
468 * contained in the @frame structure into a binary representation that
469 * can be written into the corresponding controller registers. This function
470 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
471 * specification.
472 *
473 * Returns the number of bytes packed into the binary buffer or a negative
474 * error code on failure.
475 */
476ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame,
477 void *buffer, size_t size)
478{
479 int ret;
480
481 ret = hdmi_audio_infoframe_check(frame);
482 if (ret)
483 return ret;
484
485 return hdmi_audio_infoframe_pack_only(frame, buffer, size);
486}
487EXPORT_SYMBOL(hdmi_audio_infoframe_pack);
488
489/**
490 * hdmi_audio_infoframe_pack_for_dp - Pack a HDMI Audio infoframe for DisplayPort
491 *
492 * @frame: HDMI Audio infoframe
493 * @sdp: Secondary data packet for DisplayPort.
494 * @dp_version: DisplayPort version to be encoded in the header
495 *
496 * Packs a HDMI Audio Infoframe to be sent over DisplayPort. This function
497 * fills the secondary data packet to be used for DisplayPort.
498 *
499 * Return: Number of total written bytes or a negative errno on failure.
500 */
501ssize_t
502hdmi_audio_infoframe_pack_for_dp(const struct hdmi_audio_infoframe *frame,
503 struct dp_sdp *sdp, u8 dp_version)
504{
505 int ret;
506
507 ret = hdmi_audio_infoframe_check(frame);
508 if (ret)
509 return ret;
510
511 memset(sdp->db, 0, sizeof(sdp->db));
512
513 /* Secondary-data packet header */
514 sdp->sdp_header.HB0 = 0;
515 sdp->sdp_header.HB1 = frame->type;
516 sdp->sdp_header.HB2 = DP_SDP_AUDIO_INFOFRAME_HB2;
517 sdp->sdp_header.HB3 = (dp_version & 0x3f) << 2;
518
519 hdmi_audio_infoframe_pack_payload(frame, sdp->db);
520
521 /* Return size = frame length + four HB for sdp_header */
522 return frame->length + 4;
523}
524EXPORT_SYMBOL(hdmi_audio_infoframe_pack_for_dp);
525
526/**
527 * hdmi_vendor_infoframe_init() - initialize an HDMI vendor infoframe
528 * @frame: HDMI vendor infoframe
529 *
530 * Returns 0 on success or a negative error code on failure.
531 */
532int hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe *frame)
533{
534 memset(frame, 0, sizeof(*frame));
535
536 frame->type = HDMI_INFOFRAME_TYPE_VENDOR;
537 frame->version = 1;
538
539 frame->oui = HDMI_IEEE_OUI;
540
541 /*
542 * 0 is a valid value for s3d_struct, so we use a special "not set"
543 * value
544 */
545 frame->s3d_struct = HDMI_3D_STRUCTURE_INVALID;
546 frame->length = HDMI_VENDOR_INFOFRAME_SIZE;
547
548 return 0;
549}
550EXPORT_SYMBOL(hdmi_vendor_infoframe_init);
551
552static int hdmi_vendor_infoframe_length(const struct hdmi_vendor_infoframe *frame)
553{
554 /* for side by side (half) we also need to provide 3D_Ext_Data */
555 if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
556 return 6;
557 else if (frame->vic != 0 || frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
558 return 5;
559 else
560 return 4;
561}
562
563static int hdmi_vendor_infoframe_check_only(const struct hdmi_vendor_infoframe *frame)
564{
565 if (frame->type != HDMI_INFOFRAME_TYPE_VENDOR ||
566 frame->version != 1 ||
567 frame->oui != HDMI_IEEE_OUI)
568 return -EINVAL;
569
570 /* only one of those can be supplied */
571 if (frame->vic != 0 && frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
572 return -EINVAL;
573
574 if (frame->length != hdmi_vendor_infoframe_length(frame))
575 return -EINVAL;
576
577 return 0;
578}
579
580/**
581 * hdmi_vendor_infoframe_check() - check a HDMI vendor infoframe
582 * @frame: HDMI infoframe
583 *
584 * Validates that the infoframe is consistent and updates derived fields
585 * (eg. length) based on other fields.
586 *
587 * Returns 0 on success or a negative error code on failure.
588 */
589int hdmi_vendor_infoframe_check(struct hdmi_vendor_infoframe *frame)
590{
591 frame->length = hdmi_vendor_infoframe_length(frame);
592
593 return hdmi_vendor_infoframe_check_only(frame);
594}
595EXPORT_SYMBOL(hdmi_vendor_infoframe_check);
596
597/**
598 * hdmi_vendor_infoframe_pack_only() - write a HDMI vendor infoframe to binary buffer
599 * @frame: HDMI infoframe
600 * @buffer: destination buffer
601 * @size: size of buffer
602 *
603 * Packs the information contained in the @frame structure into a binary
604 * representation that can be written into the corresponding controller
605 * registers. Also computes the checksum as required by section 5.3.5 of
606 * the HDMI 1.4 specification.
607 *
608 * Returns the number of bytes packed into the binary buffer or a negative
609 * error code on failure.
610 */
611ssize_t hdmi_vendor_infoframe_pack_only(const struct hdmi_vendor_infoframe *frame,
612 void *buffer, size_t size)
613{
614 u8 *ptr = buffer;
615 size_t length;
616 int ret;
617
618 ret = hdmi_vendor_infoframe_check_only(frame);
619 if (ret)
620 return ret;
621
622 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
623
624 if (size < length)
625 return -ENOSPC;
626
627 memset(buffer, 0, size);
628
629 ptr[0] = frame->type;
630 ptr[1] = frame->version;
631 ptr[2] = frame->length;
632 ptr[3] = 0; /* checksum */
633
634 /* HDMI OUI */
635 ptr[4] = 0x03;
636 ptr[5] = 0x0c;
637 ptr[6] = 0x00;
638
639 if (frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
640 ptr[7] = 0x2 << 5; /* video format */
641 ptr[8] = (frame->s3d_struct & 0xf) << 4;
642 if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
643 ptr[9] = (frame->s3d_ext_data & 0xf) << 4;
644 } else if (frame->vic) {
645 ptr[7] = 0x1 << 5; /* video format */
646 ptr[8] = frame->vic;
647 } else {
648 ptr[7] = 0x0 << 5; /* video format */
649 }
650
651 hdmi_infoframe_set_checksum(buffer, length);
652
653 return length;
654}
655EXPORT_SYMBOL(hdmi_vendor_infoframe_pack_only);
656
657/**
658 * hdmi_vendor_infoframe_pack() - check a HDMI Vendor infoframe,
659 * and write it to binary buffer
660 * @frame: HDMI Vendor infoframe
661 * @buffer: destination buffer
662 * @size: size of buffer
663 *
664 * Validates that the infoframe is consistent and updates derived fields
665 * (eg. length) based on other fields, after which it packs the information
666 * contained in the @frame structure into a binary representation that
667 * can be written into the corresponding controller registers. This function
668 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
669 * specification.
670 *
671 * Returns the number of bytes packed into the binary buffer or a negative
672 * error code on failure.
673 */
674ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
675 void *buffer, size_t size)
676{
677 int ret;
678
679 ret = hdmi_vendor_infoframe_check(frame);
680 if (ret)
681 return ret;
682
683 return hdmi_vendor_infoframe_pack_only(frame, buffer, size);
684}
685EXPORT_SYMBOL(hdmi_vendor_infoframe_pack);
686
687static int
688hdmi_vendor_any_infoframe_check_only(const union hdmi_vendor_any_infoframe *frame)
689{
690 if (frame->any.type != HDMI_INFOFRAME_TYPE_VENDOR ||
691 frame->any.version != 1)
692 return -EINVAL;
693
694 return 0;
695}
696
697/**
698 * hdmi_drm_infoframe_init() - initialize an HDMI Dynaminc Range and
699 * mastering infoframe
700 * @frame: HDMI DRM infoframe
701 *
702 * Returns 0 on success or a negative error code on failure.
703 */
704int hdmi_drm_infoframe_init(struct hdmi_drm_infoframe *frame)
705{
706 memset(frame, 0, sizeof(*frame));
707
708 frame->type = HDMI_INFOFRAME_TYPE_DRM;
709 frame->version = 1;
710 frame->length = HDMI_DRM_INFOFRAME_SIZE;
711
712 return 0;
713}
714EXPORT_SYMBOL(hdmi_drm_infoframe_init);
715
716static int hdmi_drm_infoframe_check_only(const struct hdmi_drm_infoframe *frame)
717{
718 if (frame->type != HDMI_INFOFRAME_TYPE_DRM ||
719 frame->version != 1)
720 return -EINVAL;
721
722 if (frame->length != HDMI_DRM_INFOFRAME_SIZE)
723 return -EINVAL;
724
725 return 0;
726}
727
728/**
729 * hdmi_drm_infoframe_check() - check a HDMI DRM infoframe
730 * @frame: HDMI DRM infoframe
731 *
732 * Validates that the infoframe is consistent.
733 * Returns 0 on success or a negative error code on failure.
734 */
735int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame)
736{
737 return hdmi_drm_infoframe_check_only(frame);
738}
739EXPORT_SYMBOL(hdmi_drm_infoframe_check);
740
741/**
742 * hdmi_drm_infoframe_pack_only() - write HDMI DRM infoframe to binary buffer
743 * @frame: HDMI DRM infoframe
744 * @buffer: destination buffer
745 * @size: size of buffer
746 *
747 * Packs the information contained in the @frame structure into a binary
748 * representation that can be written into the corresponding controller
749 * registers. Also computes the checksum as required by section 5.3.5 of
750 * the HDMI 1.4 specification.
751 *
752 * Returns the number of bytes packed into the binary buffer or a negative
753 * error code on failure.
754 */
755ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
756 void *buffer, size_t size)
757{
758 u8 *ptr = buffer;
759 size_t length;
760 int i;
761
762 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
763
764 if (size < length)
765 return -ENOSPC;
766
767 memset(buffer, 0, size);
768
769 ptr[0] = frame->type;
770 ptr[1] = frame->version;
771 ptr[2] = frame->length;
772 ptr[3] = 0; /* checksum */
773
774 /* start infoframe payload */
775 ptr += HDMI_INFOFRAME_HEADER_SIZE;
776
777 *ptr++ = frame->eotf;
778 *ptr++ = frame->metadata_type;
779
780 for (i = 0; i < 3; i++) {
781 *ptr++ = frame->display_primaries[i].x;
782 *ptr++ = frame->display_primaries[i].x >> 8;
783 *ptr++ = frame->display_primaries[i].y;
784 *ptr++ = frame->display_primaries[i].y >> 8;
785 }
786
787 *ptr++ = frame->white_point.x;
788 *ptr++ = frame->white_point.x >> 8;
789
790 *ptr++ = frame->white_point.y;
791 *ptr++ = frame->white_point.y >> 8;
792
793 *ptr++ = frame->max_display_mastering_luminance;
794 *ptr++ = frame->max_display_mastering_luminance >> 8;
795
796 *ptr++ = frame->min_display_mastering_luminance;
797 *ptr++ = frame->min_display_mastering_luminance >> 8;
798
799 *ptr++ = frame->max_cll;
800 *ptr++ = frame->max_cll >> 8;
801
802 *ptr++ = frame->max_fall;
803 *ptr++ = frame->max_fall >> 8;
804
805 hdmi_infoframe_set_checksum(buffer, length);
806
807 return length;
808}
809EXPORT_SYMBOL(hdmi_drm_infoframe_pack_only);
810
811/**
812 * hdmi_drm_infoframe_pack() - check a HDMI DRM infoframe,
813 * and write it to binary buffer
814 * @frame: HDMI DRM infoframe
815 * @buffer: destination buffer
816 * @size: size of buffer
817 *
818 * Validates that the infoframe is consistent and updates derived fields
819 * (eg. length) based on other fields, after which it packs the information
820 * contained in the @frame structure into a binary representation that
821 * can be written into the corresponding controller registers. This function
822 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
823 * specification.
824 *
825 * Returns the number of bytes packed into the binary buffer or a negative
826 * error code on failure.
827 */
828ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame,
829 void *buffer, size_t size)
830{
831 int ret;
832
833 ret = hdmi_drm_infoframe_check(frame);
834 if (ret)
835 return ret;
836
837 return hdmi_drm_infoframe_pack_only(frame, buffer, size);
838}
839EXPORT_SYMBOL(hdmi_drm_infoframe_pack);
840
841/*
842 * hdmi_vendor_any_infoframe_check() - check a vendor infoframe
843 */
844static int
845hdmi_vendor_any_infoframe_check(union hdmi_vendor_any_infoframe *frame)
846{
847 int ret;
848
849 ret = hdmi_vendor_any_infoframe_check_only(frame);
850 if (ret)
851 return ret;
852
853 /* we only know about HDMI vendor infoframes */
854 if (frame->any.oui != HDMI_IEEE_OUI)
855 return -EINVAL;
856
857 return hdmi_vendor_infoframe_check(&frame->hdmi);
858}
859
860/*
861 * hdmi_vendor_any_infoframe_pack_only() - write a vendor infoframe to binary buffer
862 */
863static ssize_t
864hdmi_vendor_any_infoframe_pack_only(const union hdmi_vendor_any_infoframe *frame,
865 void *buffer, size_t size)
866{
867 int ret;
868
869 ret = hdmi_vendor_any_infoframe_check_only(frame);
870 if (ret)
871 return ret;
872
873 /* we only know about HDMI vendor infoframes */
874 if (frame->any.oui != HDMI_IEEE_OUI)
875 return -EINVAL;
876
877 return hdmi_vendor_infoframe_pack_only(&frame->hdmi, buffer, size);
878}
879
880/*
881 * hdmi_vendor_any_infoframe_pack() - check a vendor infoframe,
882 * and write it to binary buffer
883 */
884static ssize_t
885hdmi_vendor_any_infoframe_pack(union hdmi_vendor_any_infoframe *frame,
886 void *buffer, size_t size)
887{
888 int ret;
889
890 ret = hdmi_vendor_any_infoframe_check(frame);
891 if (ret)
892 return ret;
893
894 return hdmi_vendor_any_infoframe_pack_only(frame, buffer, size);
895}
896
897/**
898 * hdmi_infoframe_check() - check a HDMI infoframe
899 * @frame: HDMI infoframe
900 *
901 * Validates that the infoframe is consistent and updates derived fields
902 * (eg. length) based on other fields.
903 *
904 * Returns 0 on success or a negative error code on failure.
905 */
906int
907hdmi_infoframe_check(union hdmi_infoframe *frame)
908{
909 switch (frame->any.type) {
910 case HDMI_INFOFRAME_TYPE_AVI:
911 return hdmi_avi_infoframe_check(&frame->avi);
912 case HDMI_INFOFRAME_TYPE_SPD:
913 return hdmi_spd_infoframe_check(&frame->spd);
914 case HDMI_INFOFRAME_TYPE_AUDIO:
915 return hdmi_audio_infoframe_check(&frame->audio);
916 case HDMI_INFOFRAME_TYPE_VENDOR:
917 return hdmi_vendor_any_infoframe_check(&frame->vendor);
918 default:
919 WARN(1, "Bad infoframe type %d\n", frame->any.type);
920 return -EINVAL;
921 }
922}
923EXPORT_SYMBOL(hdmi_infoframe_check);
924
925/**
926 * hdmi_infoframe_pack_only() - write a HDMI infoframe to binary buffer
927 * @frame: HDMI infoframe
928 * @buffer: destination buffer
929 * @size: size of buffer
930 *
931 * Packs the information contained in the @frame structure into a binary
932 * representation that can be written into the corresponding controller
933 * registers. Also computes the checksum as required by section 5.3.5 of
934 * the HDMI 1.4 specification.
935 *
936 * Returns the number of bytes packed into the binary buffer or a negative
937 * error code on failure.
938 */
939ssize_t
940hdmi_infoframe_pack_only(const union hdmi_infoframe *frame, void *buffer, size_t size)
941{
942 ssize_t length;
943
944 switch (frame->any.type) {
945 case HDMI_INFOFRAME_TYPE_AVI:
946 length = hdmi_avi_infoframe_pack_only(&frame->avi,
947 buffer, size);
948 break;
949 case HDMI_INFOFRAME_TYPE_DRM:
950 length = hdmi_drm_infoframe_pack_only(&frame->drm,
951 buffer, size);
952 break;
953 case HDMI_INFOFRAME_TYPE_SPD:
954 length = hdmi_spd_infoframe_pack_only(&frame->spd,
955 buffer, size);
956 break;
957 case HDMI_INFOFRAME_TYPE_AUDIO:
958 length = hdmi_audio_infoframe_pack_only(&frame->audio,
959 buffer, size);
960 break;
961 case HDMI_INFOFRAME_TYPE_VENDOR:
962 length = hdmi_vendor_any_infoframe_pack_only(&frame->vendor,
963 buffer, size);
964 break;
965 default:
966 WARN(1, "Bad infoframe type %d\n", frame->any.type);
967 length = -EINVAL;
968 }
969
970 return length;
971}
972EXPORT_SYMBOL(hdmi_infoframe_pack_only);
973
974/**
975 * hdmi_infoframe_pack() - check a HDMI infoframe,
976 * and write it to binary buffer
977 * @frame: HDMI infoframe
978 * @buffer: destination buffer
979 * @size: size of buffer
980 *
981 * Validates that the infoframe is consistent and updates derived fields
982 * (eg. length) based on other fields, after which it packs the information
983 * contained in the @frame structure into a binary representation that
984 * can be written into the corresponding controller registers. This function
985 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
986 * specification.
987 *
988 * Returns the number of bytes packed into the binary buffer or a negative
989 * error code on failure.
990 */
991ssize_t
992hdmi_infoframe_pack(union hdmi_infoframe *frame,
993 void *buffer, size_t size)
994{
995 ssize_t length;
996
997 switch (frame->any.type) {
998 case HDMI_INFOFRAME_TYPE_AVI:
999 length = hdmi_avi_infoframe_pack(&frame->avi, buffer, size);
1000 break;
1001 case HDMI_INFOFRAME_TYPE_DRM:
1002 length = hdmi_drm_infoframe_pack(&frame->drm, buffer, size);
1003 break;
1004 case HDMI_INFOFRAME_TYPE_SPD:
1005 length = hdmi_spd_infoframe_pack(&frame->spd, buffer, size);
1006 break;
1007 case HDMI_INFOFRAME_TYPE_AUDIO:
1008 length = hdmi_audio_infoframe_pack(&frame->audio, buffer, size);
1009 break;
1010 case HDMI_INFOFRAME_TYPE_VENDOR:
1011 length = hdmi_vendor_any_infoframe_pack(&frame->vendor,
1012 buffer, size);
1013 break;
1014 default:
1015 WARN(1, "Bad infoframe type %d\n", frame->any.type);
1016 length = -EINVAL;
1017 }
1018
1019 return length;
1020}
1021EXPORT_SYMBOL(hdmi_infoframe_pack);
1022
1023static const char *hdmi_infoframe_type_get_name(enum hdmi_infoframe_type type)
1024{
1025 if (type < 0x80 || type > 0x9f)
1026 return "Invalid";
1027 switch (type) {
1028 case HDMI_INFOFRAME_TYPE_VENDOR:
1029 return "Vendor";
1030 case HDMI_INFOFRAME_TYPE_AVI:
1031 return "Auxiliary Video Information (AVI)";
1032 case HDMI_INFOFRAME_TYPE_SPD:
1033 return "Source Product Description (SPD)";
1034 case HDMI_INFOFRAME_TYPE_AUDIO:
1035 return "Audio";
1036 case HDMI_INFOFRAME_TYPE_DRM:
1037 return "Dynamic Range and Mastering";
1038 }
1039 return "Reserved";
1040}
1041
1042static void hdmi_infoframe_log_header(const char *level,
1043 struct device *dev,
1044 const struct hdmi_any_infoframe *frame)
1045{
1046 hdmi_log("HDMI infoframe: %s, version %u, length %u\n",
1047 hdmi_infoframe_type_get_name(frame->type),
1048 frame->version, frame->length);
1049}
1050
1051static const char *hdmi_colorspace_get_name(enum hdmi_colorspace colorspace)
1052{
1053 switch (colorspace) {
1054 case HDMI_COLORSPACE_RGB:
1055 return "RGB";
1056 case HDMI_COLORSPACE_YUV422:
1057 return "YCbCr 4:2:2";
1058 case HDMI_COLORSPACE_YUV444:
1059 return "YCbCr 4:4:4";
1060 case HDMI_COLORSPACE_YUV420:
1061 return "YCbCr 4:2:0";
1062 case HDMI_COLORSPACE_RESERVED4:
1063 return "Reserved (4)";
1064 case HDMI_COLORSPACE_RESERVED5:
1065 return "Reserved (5)";
1066 case HDMI_COLORSPACE_RESERVED6:
1067 return "Reserved (6)";
1068 case HDMI_COLORSPACE_IDO_DEFINED:
1069 return "IDO Defined";
1070 }
1071 return "Invalid";
1072}
1073
1074static const char *hdmi_scan_mode_get_name(enum hdmi_scan_mode scan_mode)
1075{
1076 switch (scan_mode) {
1077 case HDMI_SCAN_MODE_NONE:
1078 return "No Data";
1079 case HDMI_SCAN_MODE_OVERSCAN:
1080 return "Overscan";
1081 case HDMI_SCAN_MODE_UNDERSCAN:
1082 return "Underscan";
1083 case HDMI_SCAN_MODE_RESERVED:
1084 return "Reserved";
1085 }
1086 return "Invalid";
1087}
1088
1089static const char *hdmi_colorimetry_get_name(enum hdmi_colorimetry colorimetry)
1090{
1091 switch (colorimetry) {
1092 case HDMI_COLORIMETRY_NONE:
1093 return "No Data";
1094 case HDMI_COLORIMETRY_ITU_601:
1095 return "ITU601";
1096 case HDMI_COLORIMETRY_ITU_709:
1097 return "ITU709";
1098 case HDMI_COLORIMETRY_EXTENDED:
1099 return "Extended";
1100 }
1101 return "Invalid";
1102}
1103
1104static const char *
1105hdmi_picture_aspect_get_name(enum hdmi_picture_aspect picture_aspect)
1106{
1107 switch (picture_aspect) {
1108 case HDMI_PICTURE_ASPECT_NONE:
1109 return "No Data";
1110 case HDMI_PICTURE_ASPECT_4_3:
1111 return "4:3";
1112 case HDMI_PICTURE_ASPECT_16_9:
1113 return "16:9";
1114 case HDMI_PICTURE_ASPECT_64_27:
1115 return "64:27";
1116 case HDMI_PICTURE_ASPECT_256_135:
1117 return "256:135";
1118 case HDMI_PICTURE_ASPECT_RESERVED:
1119 return "Reserved";
1120 }
1121 return "Invalid";
1122}
1123
1124static const char *
1125hdmi_active_aspect_get_name(enum hdmi_active_aspect active_aspect)
1126{
1127 if (active_aspect < 0 || active_aspect > 0xf)
1128 return "Invalid";
1129
1130 switch (active_aspect) {
1131 case HDMI_ACTIVE_ASPECT_16_9_TOP:
1132 return "16:9 Top";
1133 case HDMI_ACTIVE_ASPECT_14_9_TOP:
1134 return "14:9 Top";
1135 case HDMI_ACTIVE_ASPECT_16_9_CENTER:
1136 return "16:9 Center";
1137 case HDMI_ACTIVE_ASPECT_PICTURE:
1138 return "Same as Picture";
1139 case HDMI_ACTIVE_ASPECT_4_3:
1140 return "4:3";
1141 case HDMI_ACTIVE_ASPECT_16_9:
1142 return "16:9";
1143 case HDMI_ACTIVE_ASPECT_14_9:
1144 return "14:9";
1145 case HDMI_ACTIVE_ASPECT_4_3_SP_14_9:
1146 return "4:3 SP 14:9";
1147 case HDMI_ACTIVE_ASPECT_16_9_SP_14_9:
1148 return "16:9 SP 14:9";
1149 case HDMI_ACTIVE_ASPECT_16_9_SP_4_3:
1150 return "16:9 SP 4:3";
1151 }
1152 return "Reserved";
1153}
1154
1155static const char *
1156hdmi_extended_colorimetry_get_name(enum hdmi_extended_colorimetry ext_col)
1157{
1158 switch (ext_col) {
1159 case HDMI_EXTENDED_COLORIMETRY_XV_YCC_601:
1160 return "xvYCC 601";
1161 case HDMI_EXTENDED_COLORIMETRY_XV_YCC_709:
1162 return "xvYCC 709";
1163 case HDMI_EXTENDED_COLORIMETRY_S_YCC_601:
1164 return "sYCC 601";
1165 case HDMI_EXTENDED_COLORIMETRY_OPYCC_601:
1166 return "opYCC 601";
1167 case HDMI_EXTENDED_COLORIMETRY_OPRGB:
1168 return "opRGB";
1169 case HDMI_EXTENDED_COLORIMETRY_BT2020_CONST_LUM:
1170 return "BT.2020 Constant Luminance";
1171 case HDMI_EXTENDED_COLORIMETRY_BT2020:
1172 return "BT.2020";
1173 case HDMI_EXTENDED_COLORIMETRY_RESERVED:
1174 return "Reserved";
1175 }
1176 return "Invalid";
1177}
1178
1179static const char *
1180hdmi_quantization_range_get_name(enum hdmi_quantization_range qrange)
1181{
1182 switch (qrange) {
1183 case HDMI_QUANTIZATION_RANGE_DEFAULT:
1184 return "Default";
1185 case HDMI_QUANTIZATION_RANGE_LIMITED:
1186 return "Limited";
1187 case HDMI_QUANTIZATION_RANGE_FULL:
1188 return "Full";
1189 case HDMI_QUANTIZATION_RANGE_RESERVED:
1190 return "Reserved";
1191 }
1192 return "Invalid";
1193}
1194
1195static const char *hdmi_nups_get_name(enum hdmi_nups nups)
1196{
1197 switch (nups) {
1198 case HDMI_NUPS_UNKNOWN:
1199 return "Unknown Non-uniform Scaling";
1200 case HDMI_NUPS_HORIZONTAL:
1201 return "Horizontally Scaled";
1202 case HDMI_NUPS_VERTICAL:
1203 return "Vertically Scaled";
1204 case HDMI_NUPS_BOTH:
1205 return "Horizontally and Vertically Scaled";
1206 }
1207 return "Invalid";
1208}
1209
1210static const char *
1211hdmi_ycc_quantization_range_get_name(enum hdmi_ycc_quantization_range qrange)
1212{
1213 switch (qrange) {
1214 case HDMI_YCC_QUANTIZATION_RANGE_LIMITED:
1215 return "Limited";
1216 case HDMI_YCC_QUANTIZATION_RANGE_FULL:
1217 return "Full";
1218 }
1219 return "Invalid";
1220}
1221
1222static const char *
1223hdmi_content_type_get_name(enum hdmi_content_type content_type)
1224{
1225 switch (content_type) {
1226 case HDMI_CONTENT_TYPE_GRAPHICS:
1227 return "Graphics";
1228 case HDMI_CONTENT_TYPE_PHOTO:
1229 return "Photo";
1230 case HDMI_CONTENT_TYPE_CINEMA:
1231 return "Cinema";
1232 case HDMI_CONTENT_TYPE_GAME:
1233 return "Game";
1234 }
1235 return "Invalid";
1236}
1237
1238static void hdmi_avi_infoframe_log(const char *level,
1239 struct device *dev,
1240 const struct hdmi_avi_infoframe *frame)
1241{
1242 hdmi_infoframe_log_header(level, dev,
1243 (const struct hdmi_any_infoframe *)frame);
1244
1245 hdmi_log(" colorspace: %s\n",
1246 hdmi_colorspace_get_name(frame->colorspace));
1247 hdmi_log(" scan mode: %s\n",
1248 hdmi_scan_mode_get_name(frame->scan_mode));
1249 hdmi_log(" colorimetry: %s\n",
1250 hdmi_colorimetry_get_name(frame->colorimetry));
1251 hdmi_log(" picture aspect: %s\n",
1252 hdmi_picture_aspect_get_name(frame->picture_aspect));
1253 hdmi_log(" active aspect: %s\n",
1254 hdmi_active_aspect_get_name(frame->active_aspect));
1255 hdmi_log(" itc: %s\n", frame->itc ? "IT Content" : "No Data");
1256 hdmi_log(" extended colorimetry: %s\n",
1257 hdmi_extended_colorimetry_get_name(frame->extended_colorimetry));
1258 hdmi_log(" quantization range: %s\n",
1259 hdmi_quantization_range_get_name(frame->quantization_range));
1260 hdmi_log(" nups: %s\n", hdmi_nups_get_name(frame->nups));
1261 hdmi_log(" video code: %u\n", frame->video_code);
1262 hdmi_log(" ycc quantization range: %s\n",
1263 hdmi_ycc_quantization_range_get_name(frame->ycc_quantization_range));
1264 hdmi_log(" hdmi content type: %s\n",
1265 hdmi_content_type_get_name(frame->content_type));
1266 hdmi_log(" pixel repeat: %u\n", frame->pixel_repeat);
1267 hdmi_log(" bar top %u, bottom %u, left %u, right %u\n",
1268 frame->top_bar, frame->bottom_bar,
1269 frame->left_bar, frame->right_bar);
1270}
1271
1272static const char *hdmi_spd_sdi_get_name(enum hdmi_spd_sdi sdi)
1273{
1274 if (sdi < 0 || sdi > 0xff)
1275 return "Invalid";
1276 switch (sdi) {
1277 case HDMI_SPD_SDI_UNKNOWN:
1278 return "Unknown";
1279 case HDMI_SPD_SDI_DSTB:
1280 return "Digital STB";
1281 case HDMI_SPD_SDI_DVDP:
1282 return "DVD Player";
1283 case HDMI_SPD_SDI_DVHS:
1284 return "D-VHS";
1285 case HDMI_SPD_SDI_HDDVR:
1286 return "HDD Videorecorder";
1287 case HDMI_SPD_SDI_DVC:
1288 return "DVC";
1289 case HDMI_SPD_SDI_DSC:
1290 return "DSC";
1291 case HDMI_SPD_SDI_VCD:
1292 return "Video CD";
1293 case HDMI_SPD_SDI_GAME:
1294 return "Game";
1295 case HDMI_SPD_SDI_PC:
1296 return "PC General";
1297 case HDMI_SPD_SDI_BD:
1298 return "Blu-Ray Disc (BD)";
1299 case HDMI_SPD_SDI_SACD:
1300 return "Super Audio CD";
1301 case HDMI_SPD_SDI_HDDVD:
1302 return "HD DVD";
1303 case HDMI_SPD_SDI_PMP:
1304 return "PMP";
1305 }
1306 return "Reserved";
1307}
1308
1309static void hdmi_spd_infoframe_log(const char *level,
1310 struct device *dev,
1311 const struct hdmi_spd_infoframe *frame)
1312{
1313 hdmi_infoframe_log_header(level, dev,
1314 (const struct hdmi_any_infoframe *)frame);
1315
1316 hdmi_log(" vendor: %.8s\n", frame->vendor);
1317 hdmi_log(" product: %.16s\n", frame->product);
1318 hdmi_log(" source device information: %s (0x%x)\n",
1319 hdmi_spd_sdi_get_name(frame->sdi), frame->sdi);
1320}
1321
1322static const char *
1323hdmi_audio_coding_type_get_name(enum hdmi_audio_coding_type coding_type)
1324{
1325 switch (coding_type) {
1326 case HDMI_AUDIO_CODING_TYPE_STREAM:
1327 return "Refer to Stream Header";
1328 case HDMI_AUDIO_CODING_TYPE_PCM:
1329 return "PCM";
1330 case HDMI_AUDIO_CODING_TYPE_AC3:
1331 return "AC-3";
1332 case HDMI_AUDIO_CODING_TYPE_MPEG1:
1333 return "MPEG1";
1334 case HDMI_AUDIO_CODING_TYPE_MP3:
1335 return "MP3";
1336 case HDMI_AUDIO_CODING_TYPE_MPEG2:
1337 return "MPEG2";
1338 case HDMI_AUDIO_CODING_TYPE_AAC_LC:
1339 return "AAC";
1340 case HDMI_AUDIO_CODING_TYPE_DTS:
1341 return "DTS";
1342 case HDMI_AUDIO_CODING_TYPE_ATRAC:
1343 return "ATRAC";
1344 case HDMI_AUDIO_CODING_TYPE_DSD:
1345 return "One Bit Audio";
1346 case HDMI_AUDIO_CODING_TYPE_EAC3:
1347 return "Dolby Digital +";
1348 case HDMI_AUDIO_CODING_TYPE_DTS_HD:
1349 return "DTS-HD";
1350 case HDMI_AUDIO_CODING_TYPE_MLP:
1351 return "MAT (MLP)";
1352 case HDMI_AUDIO_CODING_TYPE_DST:
1353 return "DST";
1354 case HDMI_AUDIO_CODING_TYPE_WMA_PRO:
1355 return "WMA PRO";
1356 case HDMI_AUDIO_CODING_TYPE_CXT:
1357 return "Refer to CXT";
1358 }
1359 return "Invalid";
1360}
1361
1362static const char *
1363hdmi_audio_sample_size_get_name(enum hdmi_audio_sample_size sample_size)
1364{
1365 switch (sample_size) {
1366 case HDMI_AUDIO_SAMPLE_SIZE_STREAM:
1367 return "Refer to Stream Header";
1368 case HDMI_AUDIO_SAMPLE_SIZE_16:
1369 return "16 bit";
1370 case HDMI_AUDIO_SAMPLE_SIZE_20:
1371 return "20 bit";
1372 case HDMI_AUDIO_SAMPLE_SIZE_24:
1373 return "24 bit";
1374 }
1375 return "Invalid";
1376}
1377
1378static const char *
1379hdmi_audio_sample_frequency_get_name(enum hdmi_audio_sample_frequency freq)
1380{
1381 switch (freq) {
1382 case HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM:
1383 return "Refer to Stream Header";
1384 case HDMI_AUDIO_SAMPLE_FREQUENCY_32000:
1385 return "32 kHz";
1386 case HDMI_AUDIO_SAMPLE_FREQUENCY_44100:
1387 return "44.1 kHz (CD)";
1388 case HDMI_AUDIO_SAMPLE_FREQUENCY_48000:
1389 return "48 kHz";
1390 case HDMI_AUDIO_SAMPLE_FREQUENCY_88200:
1391 return "88.2 kHz";
1392 case HDMI_AUDIO_SAMPLE_FREQUENCY_96000:
1393 return "96 kHz";
1394 case HDMI_AUDIO_SAMPLE_FREQUENCY_176400:
1395 return "176.4 kHz";
1396 case HDMI_AUDIO_SAMPLE_FREQUENCY_192000:
1397 return "192 kHz";
1398 }
1399 return "Invalid";
1400}
1401
1402static const char *
1403hdmi_audio_coding_type_ext_get_name(enum hdmi_audio_coding_type_ext ctx)
1404{
1405 if (ctx < 0 || ctx > 0x1f)
1406 return "Invalid";
1407
1408 switch (ctx) {
1409 case HDMI_AUDIO_CODING_TYPE_EXT_CT:
1410 return "Refer to CT";
1411 case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC:
1412 return "HE AAC";
1413 case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC_V2:
1414 return "HE AAC v2";
1415 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG_SURROUND:
1416 return "MPEG SURROUND";
1417 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC:
1418 return "MPEG-4 HE AAC";
1419 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_V2:
1420 return "MPEG-4 HE AAC v2";
1421 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC:
1422 return "MPEG-4 AAC LC";
1423 case HDMI_AUDIO_CODING_TYPE_EXT_DRA:
1424 return "DRA";
1425 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_SURROUND:
1426 return "MPEG-4 HE AAC + MPEG Surround";
1427 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC_SURROUND:
1428 return "MPEG-4 AAC LC + MPEG Surround";
1429 }
1430 return "Reserved";
1431}
1432
1433static void hdmi_audio_infoframe_log(const char *level,
1434 struct device *dev,
1435 const struct hdmi_audio_infoframe *frame)
1436{
1437 hdmi_infoframe_log_header(level, dev,
1438 (const struct hdmi_any_infoframe *)frame);
1439
1440 if (frame->channels)
1441 hdmi_log(" channels: %u\n", frame->channels - 1);
1442 else
1443 hdmi_log(" channels: Refer to stream header\n");
1444 hdmi_log(" coding type: %s\n",
1445 hdmi_audio_coding_type_get_name(frame->coding_type));
1446 hdmi_log(" sample size: %s\n",
1447 hdmi_audio_sample_size_get_name(frame->sample_size));
1448 hdmi_log(" sample frequency: %s\n",
1449 hdmi_audio_sample_frequency_get_name(frame->sample_frequency));
1450 hdmi_log(" coding type ext: %s\n",
1451 hdmi_audio_coding_type_ext_get_name(frame->coding_type_ext));
1452 hdmi_log(" channel allocation: 0x%x\n",
1453 frame->channel_allocation);
1454 hdmi_log(" level shift value: %u dB\n",
1455 frame->level_shift_value);
1456 hdmi_log(" downmix inhibit: %s\n",
1457 frame->downmix_inhibit ? "Yes" : "No");
1458}
1459
1460static void hdmi_drm_infoframe_log(const char *level,
1461 struct device *dev,
1462 const struct hdmi_drm_infoframe *frame)
1463{
1464 int i;
1465
1466 hdmi_infoframe_log_header(level, dev,
1467 (struct hdmi_any_infoframe *)frame);
1468 hdmi_log("length: %d\n", frame->length);
1469 hdmi_log("metadata type: %d\n", frame->metadata_type);
1470 hdmi_log("eotf: %d\n", frame->eotf);
1471 for (i = 0; i < 3; i++) {
1472 hdmi_log("x[%d]: %d\n", i, frame->display_primaries[i].x);
1473 hdmi_log("y[%d]: %d\n", i, frame->display_primaries[i].y);
1474 }
1475
1476 hdmi_log("white point x: %d\n", frame->white_point.x);
1477 hdmi_log("white point y: %d\n", frame->white_point.y);
1478
1479 hdmi_log("max_display_mastering_luminance: %d\n",
1480 frame->max_display_mastering_luminance);
1481 hdmi_log("min_display_mastering_luminance: %d\n",
1482 frame->min_display_mastering_luminance);
1483
1484 hdmi_log("max_cll: %d\n", frame->max_cll);
1485 hdmi_log("max_fall: %d\n", frame->max_fall);
1486}
1487
1488static const char *
1489hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct)
1490{
1491 if (s3d_struct < 0 || s3d_struct > 0xf)
1492 return "Invalid";
1493
1494 switch (s3d_struct) {
1495 case HDMI_3D_STRUCTURE_FRAME_PACKING:
1496 return "Frame Packing";
1497 case HDMI_3D_STRUCTURE_FIELD_ALTERNATIVE:
1498 return "Field Alternative";
1499 case HDMI_3D_STRUCTURE_LINE_ALTERNATIVE:
1500 return "Line Alternative";
1501 case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_FULL:
1502 return "Side-by-side (Full)";
1503 case HDMI_3D_STRUCTURE_L_DEPTH:
1504 return "L + Depth";
1505 case HDMI_3D_STRUCTURE_L_DEPTH_GFX_GFX_DEPTH:
1506 return "L + Depth + Graphics + Graphics-depth";
1507 case HDMI_3D_STRUCTURE_TOP_AND_BOTTOM:
1508 return "Top-and-Bottom";
1509 case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF:
1510 return "Side-by-side (Half)";
1511 default:
1512 break;
1513 }
1514 return "Reserved";
1515}
1516
1517static void
1518hdmi_vendor_any_infoframe_log(const char *level,
1519 struct device *dev,
1520 const union hdmi_vendor_any_infoframe *frame)
1521{
1522 const struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
1523
1524 hdmi_infoframe_log_header(level, dev,
1525 (const struct hdmi_any_infoframe *)frame);
1526
1527 if (frame->any.oui != HDMI_IEEE_OUI) {
1528 hdmi_log(" not a HDMI vendor infoframe\n");
1529 return;
1530 }
1531 if (hvf->vic == 0 && hvf->s3d_struct == HDMI_3D_STRUCTURE_INVALID) {
1532 hdmi_log(" empty frame\n");
1533 return;
1534 }
1535
1536 if (hvf->vic)
1537 hdmi_log(" HDMI VIC: %u\n", hvf->vic);
1538 if (hvf->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
1539 hdmi_log(" 3D structure: %s\n",
1540 hdmi_3d_structure_get_name(hvf->s3d_struct));
1541 if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
1542 hdmi_log(" 3D extension data: %d\n",
1543 hvf->s3d_ext_data);
1544 }
1545}
1546
1547/**
1548 * hdmi_infoframe_log() - log info of HDMI infoframe
1549 * @level: logging level
1550 * @dev: device
1551 * @frame: HDMI infoframe
1552 */
1553void hdmi_infoframe_log(const char *level,
1554 struct device *dev,
1555 const union hdmi_infoframe *frame)
1556{
1557 switch (frame->any.type) {
1558 case HDMI_INFOFRAME_TYPE_AVI:
1559 hdmi_avi_infoframe_log(level, dev, &frame->avi);
1560 break;
1561 case HDMI_INFOFRAME_TYPE_SPD:
1562 hdmi_spd_infoframe_log(level, dev, &frame->spd);
1563 break;
1564 case HDMI_INFOFRAME_TYPE_AUDIO:
1565 hdmi_audio_infoframe_log(level, dev, &frame->audio);
1566 break;
1567 case HDMI_INFOFRAME_TYPE_VENDOR:
1568 hdmi_vendor_any_infoframe_log(level, dev, &frame->vendor);
1569 break;
1570 case HDMI_INFOFRAME_TYPE_DRM:
1571 hdmi_drm_infoframe_log(level, dev, &frame->drm);
1572 break;
1573 }
1574}
1575EXPORT_SYMBOL(hdmi_infoframe_log);
1576
1577/**
1578 * hdmi_avi_infoframe_unpack() - unpack binary buffer to a HDMI AVI infoframe
1579 * @frame: HDMI AVI infoframe
1580 * @buffer: source buffer
1581 * @size: size of buffer
1582 *
1583 * Unpacks the information contained in binary @buffer into a structured
1584 * @frame of the HDMI Auxiliary Video (AVI) information frame.
1585 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1586 * specification.
1587 *
1588 * Returns 0 on success or a negative error code on failure.
1589 */
1590static int hdmi_avi_infoframe_unpack(struct hdmi_avi_infoframe *frame,
1591 const void *buffer, size_t size)
1592{
1593 const u8 *ptr = buffer;
1594
1595 if (size < HDMI_INFOFRAME_SIZE(AVI))
1596 return -EINVAL;
1597
1598 if (ptr[0] != HDMI_INFOFRAME_TYPE_AVI ||
1599 ptr[1] != 2 ||
1600 ptr[2] != HDMI_AVI_INFOFRAME_SIZE)
1601 return -EINVAL;
1602
1603 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AVI)) != 0)
1604 return -EINVAL;
1605
1606 hdmi_avi_infoframe_init(frame);
1607
1608 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1609
1610 frame->colorspace = (ptr[0] >> 5) & 0x3;
1611 if (ptr[0] & 0x10)
1612 frame->active_aspect = ptr[1] & 0xf;
1613 if (ptr[0] & 0x8) {
1614 frame->top_bar = (ptr[6] << 8) | ptr[5];
1615 frame->bottom_bar = (ptr[8] << 8) | ptr[7];
1616 }
1617 if (ptr[0] & 0x4) {
1618 frame->left_bar = (ptr[10] << 8) | ptr[9];
1619 frame->right_bar = (ptr[12] << 8) | ptr[11];
1620 }
1621 frame->scan_mode = ptr[0] & 0x3;
1622
1623 frame->colorimetry = (ptr[1] >> 6) & 0x3;
1624 frame->picture_aspect = (ptr[1] >> 4) & 0x3;
1625 frame->active_aspect = ptr[1] & 0xf;
1626
1627 frame->itc = ptr[2] & 0x80 ? true : false;
1628 frame->extended_colorimetry = (ptr[2] >> 4) & 0x7;
1629 frame->quantization_range = (ptr[2] >> 2) & 0x3;
1630 frame->nups = ptr[2] & 0x3;
1631
1632 frame->video_code = ptr[3] & 0x7f;
1633 frame->ycc_quantization_range = (ptr[4] >> 6) & 0x3;
1634 frame->content_type = (ptr[4] >> 4) & 0x3;
1635
1636 frame->pixel_repeat = ptr[4] & 0xf;
1637
1638 return 0;
1639}
1640
1641/**
1642 * hdmi_spd_infoframe_unpack() - unpack binary buffer to a HDMI SPD infoframe
1643 * @frame: HDMI SPD infoframe
1644 * @buffer: source buffer
1645 * @size: size of buffer
1646 *
1647 * Unpacks the information contained in binary @buffer into a structured
1648 * @frame of the HDMI Source Product Description (SPD) information frame.
1649 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1650 * specification.
1651 *
1652 * Returns 0 on success or a negative error code on failure.
1653 */
1654static int hdmi_spd_infoframe_unpack(struct hdmi_spd_infoframe *frame,
1655 const void *buffer, size_t size)
1656{
1657 const u8 *ptr = buffer;
1658 int ret;
1659
1660 if (size < HDMI_INFOFRAME_SIZE(SPD))
1661 return -EINVAL;
1662
1663 if (ptr[0] != HDMI_INFOFRAME_TYPE_SPD ||
1664 ptr[1] != 1 ||
1665 ptr[2] != HDMI_SPD_INFOFRAME_SIZE) {
1666 return -EINVAL;
1667 }
1668
1669 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(SPD)) != 0)
1670 return -EINVAL;
1671
1672 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1673
1674 ret = hdmi_spd_infoframe_init(frame, ptr, ptr + 8);
1675 if (ret)
1676 return ret;
1677
1678 frame->sdi = ptr[24];
1679
1680 return 0;
1681}
1682
1683/**
1684 * hdmi_audio_infoframe_unpack() - unpack binary buffer to a HDMI AUDIO infoframe
1685 * @frame: HDMI Audio infoframe
1686 * @buffer: source buffer
1687 * @size: size of buffer
1688 *
1689 * Unpacks the information contained in binary @buffer into a structured
1690 * @frame of the HDMI Audio information frame.
1691 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1692 * specification.
1693 *
1694 * Returns 0 on success or a negative error code on failure.
1695 */
1696static int hdmi_audio_infoframe_unpack(struct hdmi_audio_infoframe *frame,
1697 const void *buffer, size_t size)
1698{
1699 const u8 *ptr = buffer;
1700 int ret;
1701
1702 if (size < HDMI_INFOFRAME_SIZE(AUDIO))
1703 return -EINVAL;
1704
1705 if (ptr[0] != HDMI_INFOFRAME_TYPE_AUDIO ||
1706 ptr[1] != 1 ||
1707 ptr[2] != HDMI_AUDIO_INFOFRAME_SIZE) {
1708 return -EINVAL;
1709 }
1710
1711 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AUDIO)) != 0)
1712 return -EINVAL;
1713
1714 ret = hdmi_audio_infoframe_init(frame);
1715 if (ret)
1716 return ret;
1717
1718 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1719
1720 frame->channels = ptr[0] & 0x7;
1721 frame->coding_type = (ptr[0] >> 4) & 0xf;
1722 frame->sample_size = ptr[1] & 0x3;
1723 frame->sample_frequency = (ptr[1] >> 2) & 0x7;
1724 frame->coding_type_ext = ptr[2] & 0x1f;
1725 frame->channel_allocation = ptr[3];
1726 frame->level_shift_value = (ptr[4] >> 3) & 0xf;
1727 frame->downmix_inhibit = ptr[4] & 0x80 ? true : false;
1728
1729 return 0;
1730}
1731
1732/**
1733 * hdmi_vendor_any_infoframe_unpack() - unpack binary buffer to a HDMI
1734 * vendor infoframe
1735 * @frame: HDMI Vendor infoframe
1736 * @buffer: source buffer
1737 * @size: size of buffer
1738 *
1739 * Unpacks the information contained in binary @buffer into a structured
1740 * @frame of the HDMI Vendor information frame.
1741 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1742 * specification.
1743 *
1744 * Returns 0 on success or a negative error code on failure.
1745 */
1746static int
1747hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame,
1748 const void *buffer, size_t size)
1749{
1750 const u8 *ptr = buffer;
1751 size_t length;
1752 int ret;
1753 u8 hdmi_video_format;
1754 struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
1755
1756 if (size < HDMI_INFOFRAME_HEADER_SIZE)
1757 return -EINVAL;
1758
1759 if (ptr[0] != HDMI_INFOFRAME_TYPE_VENDOR ||
1760 ptr[1] != 1 ||
1761 (ptr[2] != 4 && ptr[2] != 5 && ptr[2] != 6))
1762 return -EINVAL;
1763
1764 length = ptr[2];
1765
1766 if (size < HDMI_INFOFRAME_HEADER_SIZE + length)
1767 return -EINVAL;
1768
1769 if (hdmi_infoframe_checksum(buffer,
1770 HDMI_INFOFRAME_HEADER_SIZE + length) != 0)
1771 return -EINVAL;
1772
1773 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1774
1775 /* HDMI OUI */
1776 if ((ptr[0] != 0x03) ||
1777 (ptr[1] != 0x0c) ||
1778 (ptr[2] != 0x00))
1779 return -EINVAL;
1780
1781 hdmi_video_format = ptr[3] >> 5;
1782
1783 if (hdmi_video_format > 0x2)
1784 return -EINVAL;
1785
1786 ret = hdmi_vendor_infoframe_init(hvf);
1787 if (ret)
1788 return ret;
1789
1790 hvf->length = length;
1791
1792 if (hdmi_video_format == 0x2) {
1793 if (length != 5 && length != 6)
1794 return -EINVAL;
1795 hvf->s3d_struct = ptr[4] >> 4;
1796 if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF) {
1797 if (length != 6)
1798 return -EINVAL;
1799 hvf->s3d_ext_data = ptr[5] >> 4;
1800 }
1801 } else if (hdmi_video_format == 0x1) {
1802 if (length != 5)
1803 return -EINVAL;
1804 hvf->vic = ptr[4];
1805 } else {
1806 if (length != 4)
1807 return -EINVAL;
1808 }
1809
1810 return 0;
1811}
1812
1813/**
1814 * hdmi_drm_infoframe_unpack_only() - unpack binary buffer of CTA-861-G DRM
1815 * infoframe DataBytes to a HDMI DRM
1816 * infoframe
1817 * @frame: HDMI DRM infoframe
1818 * @buffer: source buffer
1819 * @size: size of buffer
1820 *
1821 * Unpacks CTA-861-G DRM infoframe DataBytes contained in the binary @buffer
1822 * into a structured @frame of the HDMI Dynamic Range and Mastering (DRM)
1823 * infoframe.
1824 *
1825 * Returns 0 on success or a negative error code on failure.
1826 */
1827int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe *frame,
1828 const void *buffer, size_t size)
1829{
1830 const u8 *ptr = buffer;
1831 const u8 *temp;
1832 u8 x_lsb, x_msb;
1833 u8 y_lsb, y_msb;
1834 int ret;
1835 int i;
1836
1837 if (size < HDMI_DRM_INFOFRAME_SIZE)
1838 return -EINVAL;
1839
1840 ret = hdmi_drm_infoframe_init(frame);
1841 if (ret)
1842 return ret;
1843
1844 frame->eotf = ptr[0] & 0x7;
1845 frame->metadata_type = ptr[1] & 0x7;
1846
1847 temp = ptr + 2;
1848 for (i = 0; i < 3; i++) {
1849 x_lsb = *temp++;
1850 x_msb = *temp++;
1851 frame->display_primaries[i].x = (x_msb << 8) | x_lsb;
1852 y_lsb = *temp++;
1853 y_msb = *temp++;
1854 frame->display_primaries[i].y = (y_msb << 8) | y_lsb;
1855 }
1856
1857 frame->white_point.x = (ptr[15] << 8) | ptr[14];
1858 frame->white_point.y = (ptr[17] << 8) | ptr[16];
1859
1860 frame->max_display_mastering_luminance = (ptr[19] << 8) | ptr[18];
1861 frame->min_display_mastering_luminance = (ptr[21] << 8) | ptr[20];
1862 frame->max_cll = (ptr[23] << 8) | ptr[22];
1863 frame->max_fall = (ptr[25] << 8) | ptr[24];
1864
1865 return 0;
1866}
1867EXPORT_SYMBOL(hdmi_drm_infoframe_unpack_only);
1868
1869/**
1870 * hdmi_drm_infoframe_unpack() - unpack binary buffer to a HDMI DRM infoframe
1871 * @frame: HDMI DRM infoframe
1872 * @buffer: source buffer
1873 * @size: size of buffer
1874 *
1875 * Unpacks the CTA-861-G DRM infoframe contained in the binary @buffer into
1876 * a structured @frame of the HDMI Dynamic Range and Mastering (DRM)
1877 * infoframe. It also verifies the checksum as required by section 5.3.5 of
1878 * the HDMI 1.4 specification.
1879 *
1880 * Returns 0 on success or a negative error code on failure.
1881 */
1882static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
1883 const void *buffer, size_t size)
1884{
1885 const u8 *ptr = buffer;
1886 int ret;
1887
1888 if (size < HDMI_INFOFRAME_SIZE(DRM))
1889 return -EINVAL;
1890
1891 if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
1892 ptr[1] != 1 ||
1893 ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
1894 return -EINVAL;
1895
1896 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(DRM)) != 0)
1897 return -EINVAL;
1898
1899 ret = hdmi_drm_infoframe_unpack_only(frame, ptr + HDMI_INFOFRAME_HEADER_SIZE,
1900 size - HDMI_INFOFRAME_HEADER_SIZE);
1901 return ret;
1902}
1903
1904/**
1905 * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe
1906 * @frame: HDMI infoframe
1907 * @buffer: source buffer
1908 * @size: size of buffer
1909 *
1910 * Unpacks the information contained in binary buffer @buffer into a structured
1911 * @frame of a HDMI infoframe.
1912 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1913 * specification.
1914 *
1915 * Returns 0 on success or a negative error code on failure.
1916 */
1917int hdmi_infoframe_unpack(union hdmi_infoframe *frame,
1918 const void *buffer, size_t size)
1919{
1920 int ret;
1921 const u8 *ptr = buffer;
1922
1923 if (size < HDMI_INFOFRAME_HEADER_SIZE)
1924 return -EINVAL;
1925
1926 switch (ptr[0]) {
1927 case HDMI_INFOFRAME_TYPE_AVI:
1928 ret = hdmi_avi_infoframe_unpack(&frame->avi, buffer, size);
1929 break;
1930 case HDMI_INFOFRAME_TYPE_DRM:
1931 ret = hdmi_drm_infoframe_unpack(&frame->drm, buffer, size);
1932 break;
1933 case HDMI_INFOFRAME_TYPE_SPD:
1934 ret = hdmi_spd_infoframe_unpack(&frame->spd, buffer, size);
1935 break;
1936 case HDMI_INFOFRAME_TYPE_AUDIO:
1937 ret = hdmi_audio_infoframe_unpack(&frame->audio, buffer, size);
1938 break;
1939 case HDMI_INFOFRAME_TYPE_VENDOR:
1940 ret = hdmi_vendor_any_infoframe_unpack(&frame->vendor, buffer, size);
1941 break;
1942 default:
1943 ret = -EINVAL;
1944 break;
1945 }
1946
1947 return ret;
1948}
1949EXPORT_SYMBOL(hdmi_infoframe_unpack);
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
34static u8 hdmi_infoframe_checksum(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
46static 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 */
59int 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}
69EXPORT_SYMBOL(hdmi_avi_infoframe_init);
70
71/**
72 * hdmi_avi_infoframe_pack() - write HDMI AVI infoframe to binary buffer
73 * @frame: HDMI AVI infoframe
74 * @buffer: destination buffer
75 * @size: size of buffer
76 *
77 * Packs the information contained in the @frame structure into a binary
78 * representation that can be written into the corresponding controller
79 * registers. Also computes the checksum as required by section 5.3.5 of
80 * the HDMI 1.4 specification.
81 *
82 * Returns the number of bytes packed into the binary buffer or a negative
83 * error code on failure.
84 */
85ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame, void *buffer,
86 size_t size)
87{
88 u8 *ptr = buffer;
89 size_t length;
90
91 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
92
93 if (size < length)
94 return -ENOSPC;
95
96 memset(buffer, 0, size);
97
98 ptr[0] = frame->type;
99 ptr[1] = frame->version;
100 ptr[2] = frame->length;
101 ptr[3] = 0; /* checksum */
102
103 /* start infoframe payload */
104 ptr += HDMI_INFOFRAME_HEADER_SIZE;
105
106 ptr[0] = ((frame->colorspace & 0x3) << 5) | (frame->scan_mode & 0x3);
107
108 /*
109 * Data byte 1, bit 4 has to be set if we provide the active format
110 * aspect ratio
111 */
112 if (frame->active_aspect & 0xf)
113 ptr[0] |= BIT(4);
114
115 /* Bit 3 and 2 indicate if we transmit horizontal/vertical bar data */
116 if (frame->top_bar || frame->bottom_bar)
117 ptr[0] |= BIT(3);
118
119 if (frame->left_bar || frame->right_bar)
120 ptr[0] |= BIT(2);
121
122 ptr[1] = ((frame->colorimetry & 0x3) << 6) |
123 ((frame->picture_aspect & 0x3) << 4) |
124 (frame->active_aspect & 0xf);
125
126 ptr[2] = ((frame->extended_colorimetry & 0x7) << 4) |
127 ((frame->quantization_range & 0x3) << 2) |
128 (frame->nups & 0x3);
129
130 if (frame->itc)
131 ptr[2] |= BIT(7);
132
133 ptr[3] = frame->video_code & 0x7f;
134
135 ptr[4] = ((frame->ycc_quantization_range & 0x3) << 6) |
136 ((frame->content_type & 0x3) << 4) |
137 (frame->pixel_repeat & 0xf);
138
139 ptr[5] = frame->top_bar & 0xff;
140 ptr[6] = (frame->top_bar >> 8) & 0xff;
141 ptr[7] = frame->bottom_bar & 0xff;
142 ptr[8] = (frame->bottom_bar >> 8) & 0xff;
143 ptr[9] = frame->left_bar & 0xff;
144 ptr[10] = (frame->left_bar >> 8) & 0xff;
145 ptr[11] = frame->right_bar & 0xff;
146 ptr[12] = (frame->right_bar >> 8) & 0xff;
147
148 hdmi_infoframe_set_checksum(buffer, length);
149
150 return length;
151}
152EXPORT_SYMBOL(hdmi_avi_infoframe_pack);
153
154/**
155 * hdmi_spd_infoframe_init() - initialize an HDMI SPD infoframe
156 * @frame: HDMI SPD infoframe
157 * @vendor: vendor string
158 * @product: product string
159 *
160 * Returns 0 on success or a negative error code on failure.
161 */
162int hdmi_spd_infoframe_init(struct hdmi_spd_infoframe *frame,
163 const char *vendor, const char *product)
164{
165 memset(frame, 0, sizeof(*frame));
166
167 frame->type = HDMI_INFOFRAME_TYPE_SPD;
168 frame->version = 1;
169 frame->length = HDMI_SPD_INFOFRAME_SIZE;
170
171 strncpy(frame->vendor, vendor, sizeof(frame->vendor));
172 strncpy(frame->product, product, sizeof(frame->product));
173
174 return 0;
175}
176EXPORT_SYMBOL(hdmi_spd_infoframe_init);
177
178/**
179 * hdmi_spd_infoframe_pack() - write HDMI SPD infoframe to binary buffer
180 * @frame: HDMI SPD infoframe
181 * @buffer: destination buffer
182 * @size: size of buffer
183 *
184 * Packs the information contained in the @frame structure into a binary
185 * representation that can be written into the corresponding controller
186 * registers. Also computes the checksum as required by section 5.3.5 of
187 * the HDMI 1.4 specification.
188 *
189 * Returns the number of bytes packed into the binary buffer or a negative
190 * error code on failure.
191 */
192ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame, void *buffer,
193 size_t size)
194{
195 u8 *ptr = buffer;
196 size_t length;
197
198 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
199
200 if (size < length)
201 return -ENOSPC;
202
203 memset(buffer, 0, size);
204
205 ptr[0] = frame->type;
206 ptr[1] = frame->version;
207 ptr[2] = frame->length;
208 ptr[3] = 0; /* checksum */
209
210 /* start infoframe payload */
211 ptr += HDMI_INFOFRAME_HEADER_SIZE;
212
213 memcpy(ptr, frame->vendor, sizeof(frame->vendor));
214 memcpy(ptr + 8, frame->product, sizeof(frame->product));
215
216 ptr[24] = frame->sdi;
217
218 hdmi_infoframe_set_checksum(buffer, length);
219
220 return length;
221}
222EXPORT_SYMBOL(hdmi_spd_infoframe_pack);
223
224/**
225 * hdmi_audio_infoframe_init() - initialize an HDMI audio infoframe
226 * @frame: HDMI audio infoframe
227 *
228 * Returns 0 on success or a negative error code on failure.
229 */
230int hdmi_audio_infoframe_init(struct hdmi_audio_infoframe *frame)
231{
232 memset(frame, 0, sizeof(*frame));
233
234 frame->type = HDMI_INFOFRAME_TYPE_AUDIO;
235 frame->version = 1;
236 frame->length = HDMI_AUDIO_INFOFRAME_SIZE;
237
238 return 0;
239}
240EXPORT_SYMBOL(hdmi_audio_infoframe_init);
241
242/**
243 * hdmi_audio_infoframe_pack() - write HDMI audio infoframe to binary buffer
244 * @frame: HDMI audio infoframe
245 * @buffer: destination buffer
246 * @size: size of buffer
247 *
248 * Packs the information contained in the @frame structure into a binary
249 * representation that can be written into the corresponding controller
250 * registers. Also computes the checksum as required by section 5.3.5 of
251 * the HDMI 1.4 specification.
252 *
253 * Returns the number of bytes packed into the binary buffer or a negative
254 * error code on failure.
255 */
256ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame,
257 void *buffer, size_t size)
258{
259 unsigned char channels;
260 u8 *ptr = buffer;
261 size_t length;
262
263 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
264
265 if (size < length)
266 return -ENOSPC;
267
268 memset(buffer, 0, size);
269
270 if (frame->channels >= 2)
271 channels = frame->channels - 1;
272 else
273 channels = 0;
274
275 ptr[0] = frame->type;
276 ptr[1] = frame->version;
277 ptr[2] = frame->length;
278 ptr[3] = 0; /* checksum */
279
280 /* start infoframe payload */
281 ptr += HDMI_INFOFRAME_HEADER_SIZE;
282
283 ptr[0] = ((frame->coding_type & 0xf) << 4) | (channels & 0x7);
284 ptr[1] = ((frame->sample_frequency & 0x7) << 2) |
285 (frame->sample_size & 0x3);
286 ptr[2] = frame->coding_type_ext & 0x1f;
287 ptr[3] = frame->channel_allocation;
288 ptr[4] = (frame->level_shift_value & 0xf) << 3;
289
290 if (frame->downmix_inhibit)
291 ptr[4] |= BIT(7);
292
293 hdmi_infoframe_set_checksum(buffer, length);
294
295 return length;
296}
297EXPORT_SYMBOL(hdmi_audio_infoframe_pack);
298
299/**
300 * hdmi_vendor_infoframe_init() - initialize an HDMI vendor infoframe
301 * @frame: HDMI vendor infoframe
302 *
303 * Returns 0 on success or a negative error code on failure.
304 */
305int hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe *frame)
306{
307 memset(frame, 0, sizeof(*frame));
308
309 frame->type = HDMI_INFOFRAME_TYPE_VENDOR;
310 frame->version = 1;
311
312 frame->oui = HDMI_IEEE_OUI;
313
314 /*
315 * 0 is a valid value for s3d_struct, so we use a special "not set"
316 * value
317 */
318 frame->s3d_struct = HDMI_3D_STRUCTURE_INVALID;
319
320 return 0;
321}
322EXPORT_SYMBOL(hdmi_vendor_infoframe_init);
323
324static int hdmi_vendor_infoframe_length(const struct hdmi_vendor_infoframe *frame)
325{
326 /* for side by side (half) we also need to provide 3D_Ext_Data */
327 if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
328 return 6;
329 else if (frame->vic != 0 || frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
330 return 5;
331 else
332 return 4;
333}
334
335/**
336 * hdmi_vendor_infoframe_pack() - write a HDMI vendor infoframe to binary buffer
337 * @frame: HDMI infoframe
338 * @buffer: destination buffer
339 * @size: size of buffer
340 *
341 * Packs the information contained in the @frame structure into a binary
342 * representation that can be written into the corresponding controller
343 * registers. Also computes the checksum as required by section 5.3.5 of
344 * the HDMI 1.4 specification.
345 *
346 * Returns the number of bytes packed into the binary buffer or a negative
347 * error code on failure.
348 */
349ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
350 void *buffer, size_t size)
351{
352 u8 *ptr = buffer;
353 size_t length;
354
355 /* only one of those can be supplied */
356 if (frame->vic != 0 && frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
357 return -EINVAL;
358
359 frame->length = hdmi_vendor_infoframe_length(frame);
360
361 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
362
363 if (size < length)
364 return -ENOSPC;
365
366 memset(buffer, 0, size);
367
368 ptr[0] = frame->type;
369 ptr[1] = frame->version;
370 ptr[2] = frame->length;
371 ptr[3] = 0; /* checksum */
372
373 /* HDMI OUI */
374 ptr[4] = 0x03;
375 ptr[5] = 0x0c;
376 ptr[6] = 0x00;
377
378 if (frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
379 ptr[7] = 0x2 << 5; /* video format */
380 ptr[8] = (frame->s3d_struct & 0xf) << 4;
381 if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
382 ptr[9] = (frame->s3d_ext_data & 0xf) << 4;
383 } else if (frame->vic) {
384 ptr[7] = 0x1 << 5; /* video format */
385 ptr[8] = frame->vic;
386 } else {
387 ptr[7] = 0x0 << 5; /* video format */
388 }
389
390 hdmi_infoframe_set_checksum(buffer, length);
391
392 return length;
393}
394EXPORT_SYMBOL(hdmi_vendor_infoframe_pack);
395
396/*
397 * hdmi_vendor_any_infoframe_pack() - write a vendor infoframe to binary buffer
398 */
399static ssize_t
400hdmi_vendor_any_infoframe_pack(union hdmi_vendor_any_infoframe *frame,
401 void *buffer, size_t size)
402{
403 /* we only know about HDMI vendor infoframes */
404 if (frame->any.oui != HDMI_IEEE_OUI)
405 return -EINVAL;
406
407 return hdmi_vendor_infoframe_pack(&frame->hdmi, buffer, size);
408}
409
410/**
411 * hdmi_infoframe_pack() - write a HDMI infoframe to binary buffer
412 * @frame: HDMI infoframe
413 * @buffer: destination buffer
414 * @size: size of buffer
415 *
416 * Packs the information contained in the @frame structure into a binary
417 * representation that can be written into the corresponding controller
418 * registers. Also computes the checksum as required by section 5.3.5 of
419 * the HDMI 1.4 specification.
420 *
421 * Returns the number of bytes packed into the binary buffer or a negative
422 * error code on failure.
423 */
424ssize_t
425hdmi_infoframe_pack(union hdmi_infoframe *frame, void *buffer, size_t size)
426{
427 ssize_t length;
428
429 switch (frame->any.type) {
430 case HDMI_INFOFRAME_TYPE_AVI:
431 length = hdmi_avi_infoframe_pack(&frame->avi, buffer, size);
432 break;
433 case HDMI_INFOFRAME_TYPE_SPD:
434 length = hdmi_spd_infoframe_pack(&frame->spd, buffer, size);
435 break;
436 case HDMI_INFOFRAME_TYPE_AUDIO:
437 length = hdmi_audio_infoframe_pack(&frame->audio, buffer, size);
438 break;
439 case HDMI_INFOFRAME_TYPE_VENDOR:
440 length = hdmi_vendor_any_infoframe_pack(&frame->vendor,
441 buffer, size);
442 break;
443 default:
444 WARN(1, "Bad infoframe type %d\n", frame->any.type);
445 length = -EINVAL;
446 }
447
448 return length;
449}
450EXPORT_SYMBOL(hdmi_infoframe_pack);
451
452static const char *hdmi_infoframe_type_get_name(enum hdmi_infoframe_type type)
453{
454 if (type < 0x80 || type > 0x9f)
455 return "Invalid";
456 switch (type) {
457 case HDMI_INFOFRAME_TYPE_VENDOR:
458 return "Vendor";
459 case HDMI_INFOFRAME_TYPE_AVI:
460 return "Auxiliary Video Information (AVI)";
461 case HDMI_INFOFRAME_TYPE_SPD:
462 return "Source Product Description (SPD)";
463 case HDMI_INFOFRAME_TYPE_AUDIO:
464 return "Audio";
465 }
466 return "Reserved";
467}
468
469static void hdmi_infoframe_log_header(const char *level,
470 struct device *dev,
471 struct hdmi_any_infoframe *frame)
472{
473 hdmi_log("HDMI infoframe: %s, version %u, length %u\n",
474 hdmi_infoframe_type_get_name(frame->type),
475 frame->version, frame->length);
476}
477
478static const char *hdmi_colorspace_get_name(enum hdmi_colorspace colorspace)
479{
480 switch (colorspace) {
481 case HDMI_COLORSPACE_RGB:
482 return "RGB";
483 case HDMI_COLORSPACE_YUV422:
484 return "YCbCr 4:2:2";
485 case HDMI_COLORSPACE_YUV444:
486 return "YCbCr 4:4:4";
487 case HDMI_COLORSPACE_YUV420:
488 return "YCbCr 4:2:0";
489 case HDMI_COLORSPACE_RESERVED4:
490 return "Reserved (4)";
491 case HDMI_COLORSPACE_RESERVED5:
492 return "Reserved (5)";
493 case HDMI_COLORSPACE_RESERVED6:
494 return "Reserved (6)";
495 case HDMI_COLORSPACE_IDO_DEFINED:
496 return "IDO Defined";
497 }
498 return "Invalid";
499}
500
501static const char *hdmi_scan_mode_get_name(enum hdmi_scan_mode scan_mode)
502{
503 switch (scan_mode) {
504 case HDMI_SCAN_MODE_NONE:
505 return "No Data";
506 case HDMI_SCAN_MODE_OVERSCAN:
507 return "Overscan";
508 case HDMI_SCAN_MODE_UNDERSCAN:
509 return "Underscan";
510 case HDMI_SCAN_MODE_RESERVED:
511 return "Reserved";
512 }
513 return "Invalid";
514}
515
516static const char *hdmi_colorimetry_get_name(enum hdmi_colorimetry colorimetry)
517{
518 switch (colorimetry) {
519 case HDMI_COLORIMETRY_NONE:
520 return "No Data";
521 case HDMI_COLORIMETRY_ITU_601:
522 return "ITU601";
523 case HDMI_COLORIMETRY_ITU_709:
524 return "ITU709";
525 case HDMI_COLORIMETRY_EXTENDED:
526 return "Extended";
527 }
528 return "Invalid";
529}
530
531static const char *
532hdmi_picture_aspect_get_name(enum hdmi_picture_aspect picture_aspect)
533{
534 switch (picture_aspect) {
535 case HDMI_PICTURE_ASPECT_NONE:
536 return "No Data";
537 case HDMI_PICTURE_ASPECT_4_3:
538 return "4:3";
539 case HDMI_PICTURE_ASPECT_16_9:
540 return "16:9";
541 case HDMI_PICTURE_ASPECT_64_27:
542 return "64:27";
543 case HDMI_PICTURE_ASPECT_256_135:
544 return "256:135";
545 case HDMI_PICTURE_ASPECT_RESERVED:
546 return "Reserved";
547 }
548 return "Invalid";
549}
550
551static const char *
552hdmi_active_aspect_get_name(enum hdmi_active_aspect active_aspect)
553{
554 if (active_aspect < 0 || active_aspect > 0xf)
555 return "Invalid";
556
557 switch (active_aspect) {
558 case HDMI_ACTIVE_ASPECT_16_9_TOP:
559 return "16:9 Top";
560 case HDMI_ACTIVE_ASPECT_14_9_TOP:
561 return "14:9 Top";
562 case HDMI_ACTIVE_ASPECT_16_9_CENTER:
563 return "16:9 Center";
564 case HDMI_ACTIVE_ASPECT_PICTURE:
565 return "Same as Picture";
566 case HDMI_ACTIVE_ASPECT_4_3:
567 return "4:3";
568 case HDMI_ACTIVE_ASPECT_16_9:
569 return "16:9";
570 case HDMI_ACTIVE_ASPECT_14_9:
571 return "14:9";
572 case HDMI_ACTIVE_ASPECT_4_3_SP_14_9:
573 return "4:3 SP 14:9";
574 case HDMI_ACTIVE_ASPECT_16_9_SP_14_9:
575 return "16:9 SP 14:9";
576 case HDMI_ACTIVE_ASPECT_16_9_SP_4_3:
577 return "16:9 SP 4:3";
578 }
579 return "Reserved";
580}
581
582static const char *
583hdmi_extended_colorimetry_get_name(enum hdmi_extended_colorimetry ext_col)
584{
585 switch (ext_col) {
586 case HDMI_EXTENDED_COLORIMETRY_XV_YCC_601:
587 return "xvYCC 601";
588 case HDMI_EXTENDED_COLORIMETRY_XV_YCC_709:
589 return "xvYCC 709";
590 case HDMI_EXTENDED_COLORIMETRY_S_YCC_601:
591 return "sYCC 601";
592 case HDMI_EXTENDED_COLORIMETRY_ADOBE_YCC_601:
593 return "Adobe YCC 601";
594 case HDMI_EXTENDED_COLORIMETRY_ADOBE_RGB:
595 return "Adobe RGB";
596 case HDMI_EXTENDED_COLORIMETRY_BT2020_CONST_LUM:
597 return "BT.2020 Constant Luminance";
598 case HDMI_EXTENDED_COLORIMETRY_BT2020:
599 return "BT.2020";
600 case HDMI_EXTENDED_COLORIMETRY_RESERVED:
601 return "Reserved";
602 }
603 return "Invalid";
604}
605
606static const char *
607hdmi_quantization_range_get_name(enum hdmi_quantization_range qrange)
608{
609 switch (qrange) {
610 case HDMI_QUANTIZATION_RANGE_DEFAULT:
611 return "Default";
612 case HDMI_QUANTIZATION_RANGE_LIMITED:
613 return "Limited";
614 case HDMI_QUANTIZATION_RANGE_FULL:
615 return "Full";
616 case HDMI_QUANTIZATION_RANGE_RESERVED:
617 return "Reserved";
618 }
619 return "Invalid";
620}
621
622static const char *hdmi_nups_get_name(enum hdmi_nups nups)
623{
624 switch (nups) {
625 case HDMI_NUPS_UNKNOWN:
626 return "Unknown Non-uniform Scaling";
627 case HDMI_NUPS_HORIZONTAL:
628 return "Horizontally Scaled";
629 case HDMI_NUPS_VERTICAL:
630 return "Vertically Scaled";
631 case HDMI_NUPS_BOTH:
632 return "Horizontally and Vertically Scaled";
633 }
634 return "Invalid";
635}
636
637static const char *
638hdmi_ycc_quantization_range_get_name(enum hdmi_ycc_quantization_range qrange)
639{
640 switch (qrange) {
641 case HDMI_YCC_QUANTIZATION_RANGE_LIMITED:
642 return "Limited";
643 case HDMI_YCC_QUANTIZATION_RANGE_FULL:
644 return "Full";
645 }
646 return "Invalid";
647}
648
649static const char *
650hdmi_content_type_get_name(enum hdmi_content_type content_type)
651{
652 switch (content_type) {
653 case HDMI_CONTENT_TYPE_GRAPHICS:
654 return "Graphics";
655 case HDMI_CONTENT_TYPE_PHOTO:
656 return "Photo";
657 case HDMI_CONTENT_TYPE_CINEMA:
658 return "Cinema";
659 case HDMI_CONTENT_TYPE_GAME:
660 return "Game";
661 }
662 return "Invalid";
663}
664
665/**
666 * hdmi_avi_infoframe_log() - log info of HDMI AVI infoframe
667 * @level: logging level
668 * @dev: device
669 * @frame: HDMI AVI infoframe
670 */
671static void hdmi_avi_infoframe_log(const char *level,
672 struct device *dev,
673 struct hdmi_avi_infoframe *frame)
674{
675 hdmi_infoframe_log_header(level, dev,
676 (struct hdmi_any_infoframe *)frame);
677
678 hdmi_log(" colorspace: %s\n",
679 hdmi_colorspace_get_name(frame->colorspace));
680 hdmi_log(" scan mode: %s\n",
681 hdmi_scan_mode_get_name(frame->scan_mode));
682 hdmi_log(" colorimetry: %s\n",
683 hdmi_colorimetry_get_name(frame->colorimetry));
684 hdmi_log(" picture aspect: %s\n",
685 hdmi_picture_aspect_get_name(frame->picture_aspect));
686 hdmi_log(" active aspect: %s\n",
687 hdmi_active_aspect_get_name(frame->active_aspect));
688 hdmi_log(" itc: %s\n", frame->itc ? "IT Content" : "No Data");
689 hdmi_log(" extended colorimetry: %s\n",
690 hdmi_extended_colorimetry_get_name(frame->extended_colorimetry));
691 hdmi_log(" quantization range: %s\n",
692 hdmi_quantization_range_get_name(frame->quantization_range));
693 hdmi_log(" nups: %s\n", hdmi_nups_get_name(frame->nups));
694 hdmi_log(" video code: %u\n", frame->video_code);
695 hdmi_log(" ycc quantization range: %s\n",
696 hdmi_ycc_quantization_range_get_name(frame->ycc_quantization_range));
697 hdmi_log(" hdmi content type: %s\n",
698 hdmi_content_type_get_name(frame->content_type));
699 hdmi_log(" pixel repeat: %u\n", frame->pixel_repeat);
700 hdmi_log(" bar top %u, bottom %u, left %u, right %u\n",
701 frame->top_bar, frame->bottom_bar,
702 frame->left_bar, frame->right_bar);
703}
704
705static const char *hdmi_spd_sdi_get_name(enum hdmi_spd_sdi sdi)
706{
707 if (sdi < 0 || sdi > 0xff)
708 return "Invalid";
709 switch (sdi) {
710 case HDMI_SPD_SDI_UNKNOWN:
711 return "Unknown";
712 case HDMI_SPD_SDI_DSTB:
713 return "Digital STB";
714 case HDMI_SPD_SDI_DVDP:
715 return "DVD Player";
716 case HDMI_SPD_SDI_DVHS:
717 return "D-VHS";
718 case HDMI_SPD_SDI_HDDVR:
719 return "HDD Videorecorder";
720 case HDMI_SPD_SDI_DVC:
721 return "DVC";
722 case HDMI_SPD_SDI_DSC:
723 return "DSC";
724 case HDMI_SPD_SDI_VCD:
725 return "Video CD";
726 case HDMI_SPD_SDI_GAME:
727 return "Game";
728 case HDMI_SPD_SDI_PC:
729 return "PC General";
730 case HDMI_SPD_SDI_BD:
731 return "Blu-Ray Disc (BD)";
732 case HDMI_SPD_SDI_SACD:
733 return "Super Audio CD";
734 case HDMI_SPD_SDI_HDDVD:
735 return "HD DVD";
736 case HDMI_SPD_SDI_PMP:
737 return "PMP";
738 }
739 return "Reserved";
740}
741
742/**
743 * hdmi_spd_infoframe_log() - log info of HDMI SPD infoframe
744 * @level: logging level
745 * @dev: device
746 * @frame: HDMI SPD infoframe
747 */
748static void hdmi_spd_infoframe_log(const char *level,
749 struct device *dev,
750 struct hdmi_spd_infoframe *frame)
751{
752 u8 buf[17];
753
754 hdmi_infoframe_log_header(level, dev,
755 (struct hdmi_any_infoframe *)frame);
756
757 memset(buf, 0, sizeof(buf));
758
759 strncpy(buf, frame->vendor, 8);
760 hdmi_log(" vendor: %s\n", buf);
761 strncpy(buf, frame->product, 16);
762 hdmi_log(" product: %s\n", buf);
763 hdmi_log(" source device information: %s (0x%x)\n",
764 hdmi_spd_sdi_get_name(frame->sdi), frame->sdi);
765}
766
767static const char *
768hdmi_audio_coding_type_get_name(enum hdmi_audio_coding_type coding_type)
769{
770 switch (coding_type) {
771 case HDMI_AUDIO_CODING_TYPE_STREAM:
772 return "Refer to Stream Header";
773 case HDMI_AUDIO_CODING_TYPE_PCM:
774 return "PCM";
775 case HDMI_AUDIO_CODING_TYPE_AC3:
776 return "AC-3";
777 case HDMI_AUDIO_CODING_TYPE_MPEG1:
778 return "MPEG1";
779 case HDMI_AUDIO_CODING_TYPE_MP3:
780 return "MP3";
781 case HDMI_AUDIO_CODING_TYPE_MPEG2:
782 return "MPEG2";
783 case HDMI_AUDIO_CODING_TYPE_AAC_LC:
784 return "AAC";
785 case HDMI_AUDIO_CODING_TYPE_DTS:
786 return "DTS";
787 case HDMI_AUDIO_CODING_TYPE_ATRAC:
788 return "ATRAC";
789 case HDMI_AUDIO_CODING_TYPE_DSD:
790 return "One Bit Audio";
791 case HDMI_AUDIO_CODING_TYPE_EAC3:
792 return "Dolby Digital +";
793 case HDMI_AUDIO_CODING_TYPE_DTS_HD:
794 return "DTS-HD";
795 case HDMI_AUDIO_CODING_TYPE_MLP:
796 return "MAT (MLP)";
797 case HDMI_AUDIO_CODING_TYPE_DST:
798 return "DST";
799 case HDMI_AUDIO_CODING_TYPE_WMA_PRO:
800 return "WMA PRO";
801 case HDMI_AUDIO_CODING_TYPE_CXT:
802 return "Refer to CXT";
803 }
804 return "Invalid";
805}
806
807static const char *
808hdmi_audio_sample_size_get_name(enum hdmi_audio_sample_size sample_size)
809{
810 switch (sample_size) {
811 case HDMI_AUDIO_SAMPLE_SIZE_STREAM:
812 return "Refer to Stream Header";
813 case HDMI_AUDIO_SAMPLE_SIZE_16:
814 return "16 bit";
815 case HDMI_AUDIO_SAMPLE_SIZE_20:
816 return "20 bit";
817 case HDMI_AUDIO_SAMPLE_SIZE_24:
818 return "24 bit";
819 }
820 return "Invalid";
821}
822
823static const char *
824hdmi_audio_sample_frequency_get_name(enum hdmi_audio_sample_frequency freq)
825{
826 switch (freq) {
827 case HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM:
828 return "Refer to Stream Header";
829 case HDMI_AUDIO_SAMPLE_FREQUENCY_32000:
830 return "32 kHz";
831 case HDMI_AUDIO_SAMPLE_FREQUENCY_44100:
832 return "44.1 kHz (CD)";
833 case HDMI_AUDIO_SAMPLE_FREQUENCY_48000:
834 return "48 kHz";
835 case HDMI_AUDIO_SAMPLE_FREQUENCY_88200:
836 return "88.2 kHz";
837 case HDMI_AUDIO_SAMPLE_FREQUENCY_96000:
838 return "96 kHz";
839 case HDMI_AUDIO_SAMPLE_FREQUENCY_176400:
840 return "176.4 kHz";
841 case HDMI_AUDIO_SAMPLE_FREQUENCY_192000:
842 return "192 kHz";
843 }
844 return "Invalid";
845}
846
847static const char *
848hdmi_audio_coding_type_ext_get_name(enum hdmi_audio_coding_type_ext ctx)
849{
850 if (ctx < 0 || ctx > 0x1f)
851 return "Invalid";
852
853 switch (ctx) {
854 case HDMI_AUDIO_CODING_TYPE_EXT_CT:
855 return "Refer to CT";
856 case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC:
857 return "HE AAC";
858 case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC_V2:
859 return "HE AAC v2";
860 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG_SURROUND:
861 return "MPEG SURROUND";
862 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC:
863 return "MPEG-4 HE AAC";
864 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_V2:
865 return "MPEG-4 HE AAC v2";
866 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC:
867 return "MPEG-4 AAC LC";
868 case HDMI_AUDIO_CODING_TYPE_EXT_DRA:
869 return "DRA";
870 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_SURROUND:
871 return "MPEG-4 HE AAC + MPEG Surround";
872 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC_SURROUND:
873 return "MPEG-4 AAC LC + MPEG Surround";
874 }
875 return "Reserved";
876}
877
878/**
879 * hdmi_audio_infoframe_log() - log info of HDMI AUDIO infoframe
880 * @level: logging level
881 * @dev: device
882 * @frame: HDMI AUDIO infoframe
883 */
884static void hdmi_audio_infoframe_log(const char *level,
885 struct device *dev,
886 struct hdmi_audio_infoframe *frame)
887{
888 hdmi_infoframe_log_header(level, dev,
889 (struct hdmi_any_infoframe *)frame);
890
891 if (frame->channels)
892 hdmi_log(" channels: %u\n", frame->channels - 1);
893 else
894 hdmi_log(" channels: Refer to stream header\n");
895 hdmi_log(" coding type: %s\n",
896 hdmi_audio_coding_type_get_name(frame->coding_type));
897 hdmi_log(" sample size: %s\n",
898 hdmi_audio_sample_size_get_name(frame->sample_size));
899 hdmi_log(" sample frequency: %s\n",
900 hdmi_audio_sample_frequency_get_name(frame->sample_frequency));
901 hdmi_log(" coding type ext: %s\n",
902 hdmi_audio_coding_type_ext_get_name(frame->coding_type_ext));
903 hdmi_log(" channel allocation: 0x%x\n",
904 frame->channel_allocation);
905 hdmi_log(" level shift value: %u dB\n",
906 frame->level_shift_value);
907 hdmi_log(" downmix inhibit: %s\n",
908 frame->downmix_inhibit ? "Yes" : "No");
909}
910
911static const char *
912hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct)
913{
914 if (s3d_struct < 0 || s3d_struct > 0xf)
915 return "Invalid";
916
917 switch (s3d_struct) {
918 case HDMI_3D_STRUCTURE_FRAME_PACKING:
919 return "Frame Packing";
920 case HDMI_3D_STRUCTURE_FIELD_ALTERNATIVE:
921 return "Field Alternative";
922 case HDMI_3D_STRUCTURE_LINE_ALTERNATIVE:
923 return "Line Alternative";
924 case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_FULL:
925 return "Side-by-side (Full)";
926 case HDMI_3D_STRUCTURE_L_DEPTH:
927 return "L + Depth";
928 case HDMI_3D_STRUCTURE_L_DEPTH_GFX_GFX_DEPTH:
929 return "L + Depth + Graphics + Graphics-depth";
930 case HDMI_3D_STRUCTURE_TOP_AND_BOTTOM:
931 return "Top-and-Bottom";
932 case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF:
933 return "Side-by-side (Half)";
934 default:
935 break;
936 }
937 return "Reserved";
938}
939
940/**
941 * hdmi_vendor_infoframe_log() - log info of HDMI VENDOR infoframe
942 * @level: logging level
943 * @dev: device
944 * @frame: HDMI VENDOR infoframe
945 */
946static void
947hdmi_vendor_any_infoframe_log(const char *level,
948 struct device *dev,
949 union hdmi_vendor_any_infoframe *frame)
950{
951 struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
952
953 hdmi_infoframe_log_header(level, dev,
954 (struct hdmi_any_infoframe *)frame);
955
956 if (frame->any.oui != HDMI_IEEE_OUI) {
957 hdmi_log(" not a HDMI vendor infoframe\n");
958 return;
959 }
960 if (hvf->vic == 0 && hvf->s3d_struct == HDMI_3D_STRUCTURE_INVALID) {
961 hdmi_log(" empty frame\n");
962 return;
963 }
964
965 if (hvf->vic)
966 hdmi_log(" HDMI VIC: %u\n", hvf->vic);
967 if (hvf->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
968 hdmi_log(" 3D structure: %s\n",
969 hdmi_3d_structure_get_name(hvf->s3d_struct));
970 if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
971 hdmi_log(" 3D extension data: %d\n",
972 hvf->s3d_ext_data);
973 }
974}
975
976/**
977 * hdmi_infoframe_log() - log info of HDMI infoframe
978 * @level: logging level
979 * @dev: device
980 * @frame: HDMI infoframe
981 */
982void hdmi_infoframe_log(const char *level,
983 struct device *dev,
984 union hdmi_infoframe *frame)
985{
986 switch (frame->any.type) {
987 case HDMI_INFOFRAME_TYPE_AVI:
988 hdmi_avi_infoframe_log(level, dev, &frame->avi);
989 break;
990 case HDMI_INFOFRAME_TYPE_SPD:
991 hdmi_spd_infoframe_log(level, dev, &frame->spd);
992 break;
993 case HDMI_INFOFRAME_TYPE_AUDIO:
994 hdmi_audio_infoframe_log(level, dev, &frame->audio);
995 break;
996 case HDMI_INFOFRAME_TYPE_VENDOR:
997 hdmi_vendor_any_infoframe_log(level, dev, &frame->vendor);
998 break;
999 }
1000}
1001EXPORT_SYMBOL(hdmi_infoframe_log);
1002
1003/**
1004 * hdmi_avi_infoframe_unpack() - unpack binary buffer to a HDMI AVI infoframe
1005 * @buffer: source buffer
1006 * @frame: HDMI AVI infoframe
1007 *
1008 * Unpacks the information contained in binary @buffer into a structured
1009 * @frame of the HDMI Auxiliary Video (AVI) information frame.
1010 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1011 * specification.
1012 *
1013 * Returns 0 on success or a negative error code on failure.
1014 */
1015static int hdmi_avi_infoframe_unpack(struct hdmi_avi_infoframe *frame,
1016 void *buffer)
1017{
1018 u8 *ptr = buffer;
1019 int ret;
1020
1021 if (ptr[0] != HDMI_INFOFRAME_TYPE_AVI ||
1022 ptr[1] != 2 ||
1023 ptr[2] != HDMI_AVI_INFOFRAME_SIZE)
1024 return -EINVAL;
1025
1026 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AVI)) != 0)
1027 return -EINVAL;
1028
1029 ret = hdmi_avi_infoframe_init(frame);
1030 if (ret)
1031 return ret;
1032
1033 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1034
1035 frame->colorspace = (ptr[0] >> 5) & 0x3;
1036 if (ptr[0] & 0x10)
1037 frame->active_aspect = ptr[1] & 0xf;
1038 if (ptr[0] & 0x8) {
1039 frame->top_bar = (ptr[5] << 8) + ptr[6];
1040 frame->bottom_bar = (ptr[7] << 8) + ptr[8];
1041 }
1042 if (ptr[0] & 0x4) {
1043 frame->left_bar = (ptr[9] << 8) + ptr[10];
1044 frame->right_bar = (ptr[11] << 8) + ptr[12];
1045 }
1046 frame->scan_mode = ptr[0] & 0x3;
1047
1048 frame->colorimetry = (ptr[1] >> 6) & 0x3;
1049 frame->picture_aspect = (ptr[1] >> 4) & 0x3;
1050 frame->active_aspect = ptr[1] & 0xf;
1051
1052 frame->itc = ptr[2] & 0x80 ? true : false;
1053 frame->extended_colorimetry = (ptr[2] >> 4) & 0x7;
1054 frame->quantization_range = (ptr[2] >> 2) & 0x3;
1055 frame->nups = ptr[2] & 0x3;
1056
1057 frame->video_code = ptr[3] & 0x7f;
1058 frame->ycc_quantization_range = (ptr[4] >> 6) & 0x3;
1059 frame->content_type = (ptr[4] >> 4) & 0x3;
1060
1061 frame->pixel_repeat = ptr[4] & 0xf;
1062
1063 return 0;
1064}
1065
1066/**
1067 * hdmi_spd_infoframe_unpack() - unpack binary buffer to a HDMI SPD infoframe
1068 * @buffer: source buffer
1069 * @frame: HDMI SPD infoframe
1070 *
1071 * Unpacks the information contained in binary @buffer into a structured
1072 * @frame of the HDMI Source Product Description (SPD) information frame.
1073 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1074 * specification.
1075 *
1076 * Returns 0 on success or a negative error code on failure.
1077 */
1078static int hdmi_spd_infoframe_unpack(struct hdmi_spd_infoframe *frame,
1079 void *buffer)
1080{
1081 u8 *ptr = buffer;
1082 int ret;
1083
1084 if (ptr[0] != HDMI_INFOFRAME_TYPE_SPD ||
1085 ptr[1] != 1 ||
1086 ptr[2] != HDMI_SPD_INFOFRAME_SIZE) {
1087 return -EINVAL;
1088 }
1089
1090 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(SPD)) != 0)
1091 return -EINVAL;
1092
1093 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1094
1095 ret = hdmi_spd_infoframe_init(frame, ptr, ptr + 8);
1096 if (ret)
1097 return ret;
1098
1099 frame->sdi = ptr[24];
1100
1101 return 0;
1102}
1103
1104/**
1105 * hdmi_audio_infoframe_unpack() - unpack binary buffer to a HDMI AUDIO infoframe
1106 * @buffer: source buffer
1107 * @frame: HDMI Audio infoframe
1108 *
1109 * Unpacks the information contained in binary @buffer into a structured
1110 * @frame of the HDMI Audio information frame.
1111 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1112 * specification.
1113 *
1114 * Returns 0 on success or a negative error code on failure.
1115 */
1116static int hdmi_audio_infoframe_unpack(struct hdmi_audio_infoframe *frame,
1117 void *buffer)
1118{
1119 u8 *ptr = buffer;
1120 int ret;
1121
1122 if (ptr[0] != HDMI_INFOFRAME_TYPE_AUDIO ||
1123 ptr[1] != 1 ||
1124 ptr[2] != HDMI_AUDIO_INFOFRAME_SIZE) {
1125 return -EINVAL;
1126 }
1127
1128 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AUDIO)) != 0)
1129 return -EINVAL;
1130
1131 ret = hdmi_audio_infoframe_init(frame);
1132 if (ret)
1133 return ret;
1134
1135 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1136
1137 frame->channels = ptr[0] & 0x7;
1138 frame->coding_type = (ptr[0] >> 4) & 0xf;
1139 frame->sample_size = ptr[1] & 0x3;
1140 frame->sample_frequency = (ptr[1] >> 2) & 0x7;
1141 frame->coding_type_ext = ptr[2] & 0x1f;
1142 frame->channel_allocation = ptr[3];
1143 frame->level_shift_value = (ptr[4] >> 3) & 0xf;
1144 frame->downmix_inhibit = ptr[4] & 0x80 ? true : false;
1145
1146 return 0;
1147}
1148
1149/**
1150 * hdmi_vendor_infoframe_unpack() - unpack binary buffer to a HDMI vendor infoframe
1151 * @buffer: source buffer
1152 * @frame: HDMI Vendor infoframe
1153 *
1154 * Unpacks the information contained in binary @buffer into a structured
1155 * @frame of the HDMI Vendor information frame.
1156 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1157 * specification.
1158 *
1159 * Returns 0 on success or a negative error code on failure.
1160 */
1161static int
1162hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame,
1163 void *buffer)
1164{
1165 u8 *ptr = buffer;
1166 size_t length;
1167 int ret;
1168 u8 hdmi_video_format;
1169 struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
1170
1171 if (ptr[0] != HDMI_INFOFRAME_TYPE_VENDOR ||
1172 ptr[1] != 1 ||
1173 (ptr[2] != 4 && ptr[2] != 5 && ptr[2] != 6))
1174 return -EINVAL;
1175
1176 length = ptr[2];
1177
1178 if (hdmi_infoframe_checksum(buffer,
1179 HDMI_INFOFRAME_HEADER_SIZE + length) != 0)
1180 return -EINVAL;
1181
1182 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1183
1184 /* HDMI OUI */
1185 if ((ptr[0] != 0x03) ||
1186 (ptr[1] != 0x0c) ||
1187 (ptr[2] != 0x00))
1188 return -EINVAL;
1189
1190 hdmi_video_format = ptr[3] >> 5;
1191
1192 if (hdmi_video_format > 0x2)
1193 return -EINVAL;
1194
1195 ret = hdmi_vendor_infoframe_init(hvf);
1196 if (ret)
1197 return ret;
1198
1199 hvf->length = length;
1200
1201 if (hdmi_video_format == 0x2) {
1202 if (length != 5 && length != 6)
1203 return -EINVAL;
1204 hvf->s3d_struct = ptr[4] >> 4;
1205 if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF) {
1206 if (length != 6)
1207 return -EINVAL;
1208 hvf->s3d_ext_data = ptr[5] >> 4;
1209 }
1210 } else if (hdmi_video_format == 0x1) {
1211 if (length != 5)
1212 return -EINVAL;
1213 hvf->vic = ptr[4];
1214 } else {
1215 if (length != 4)
1216 return -EINVAL;
1217 }
1218
1219 return 0;
1220}
1221
1222/**
1223 * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe
1224 * @buffer: source buffer
1225 * @frame: HDMI infoframe
1226 *
1227 * Unpacks the information contained in binary buffer @buffer into a structured
1228 * @frame of a HDMI infoframe.
1229 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1230 * specification.
1231 *
1232 * Returns 0 on success or a negative error code on failure.
1233 */
1234int hdmi_infoframe_unpack(union hdmi_infoframe *frame, void *buffer)
1235{
1236 int ret;
1237 u8 *ptr = buffer;
1238
1239 switch (ptr[0]) {
1240 case HDMI_INFOFRAME_TYPE_AVI:
1241 ret = hdmi_avi_infoframe_unpack(&frame->avi, buffer);
1242 break;
1243 case HDMI_INFOFRAME_TYPE_SPD:
1244 ret = hdmi_spd_infoframe_unpack(&frame->spd, buffer);
1245 break;
1246 case HDMI_INFOFRAME_TYPE_AUDIO:
1247 ret = hdmi_audio_infoframe_unpack(&frame->audio, buffer);
1248 break;
1249 case HDMI_INFOFRAME_TYPE_VENDOR:
1250 ret = hdmi_vendor_any_infoframe_unpack(&frame->vendor, buffer);
1251 break;
1252 default:
1253 ret = -EINVAL;
1254 break;
1255 }
1256
1257 return ret;
1258}
1259EXPORT_SYMBOL(hdmi_infoframe_unpack);