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
hdmi_infoframe_checksum(const u8 * ptr,size_t size)35 static 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
hdmi_infoframe_set_checksum(void * buffer,size_t size)47 static 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 */
hdmi_avi_infoframe_init(struct hdmi_avi_infoframe * frame)58 void 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 }
66 EXPORT_SYMBOL(hdmi_avi_infoframe_init);
67
hdmi_avi_infoframe_check_only(const struct hdmi_avi_infoframe * frame)68 static 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 */
hdmi_avi_infoframe_check(struct hdmi_avi_infoframe * frame)90 int hdmi_avi_infoframe_check(struct hdmi_avi_infoframe *frame)
91 {
92 return hdmi_avi_infoframe_check_only(frame);
93 }
94 EXPORT_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 */
hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe * frame,void * buffer,size_t size)110 ssize_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 }
182 EXPORT_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 */
hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe * frame,void * buffer,size_t size)201 ssize_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 }
212 EXPORT_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 */
hdmi_spd_infoframe_init(struct hdmi_spd_infoframe * frame,const char * vendor,const char * product)222 int 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 }
240 EXPORT_SYMBOL(hdmi_spd_infoframe_init);
241
hdmi_spd_infoframe_check_only(const struct hdmi_spd_infoframe * frame)242 static 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 */
hdmi_spd_infoframe_check(struct hdmi_spd_infoframe * frame)261 int hdmi_spd_infoframe_check(struct hdmi_spd_infoframe *frame)
262 {
263 return hdmi_spd_infoframe_check_only(frame);
264 }
265 EXPORT_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 */
hdmi_spd_infoframe_pack_only(const struct hdmi_spd_infoframe * frame,void * buffer,size_t size)281 ssize_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 }
316 EXPORT_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 */
hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe * frame,void * buffer,size_t size)335 ssize_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 }
346 EXPORT_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 */
hdmi_audio_infoframe_init(struct hdmi_audio_infoframe * frame)354 int 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 }
364 EXPORT_SYMBOL(hdmi_audio_infoframe_init);
365
hdmi_audio_infoframe_check_only(const struct hdmi_audio_infoframe * frame)366 static 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 */
hdmi_audio_infoframe_check(const struct hdmi_audio_infoframe * frame)385 int hdmi_audio_infoframe_check(const struct hdmi_audio_infoframe *frame)
386 {
387 return hdmi_audio_infoframe_check_only(frame);
388 }
389 EXPORT_SYMBOL(hdmi_audio_infoframe_check);
390
391 static void
hdmi_audio_infoframe_pack_payload(const struct hdmi_audio_infoframe * frame,u8 * buffer)392 hdmi_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 */
hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe * frame,void * buffer,size_t size)427 ssize_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 }
457 EXPORT_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 */
hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe * frame,void * buffer,size_t size)476 ssize_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 }
487 EXPORT_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 */
501 ssize_t
hdmi_audio_infoframe_pack_for_dp(const struct hdmi_audio_infoframe * frame,struct dp_sdp * sdp,u8 dp_version)502 hdmi_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 }
524 EXPORT_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 */
hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe * frame)532 int 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 }
550 EXPORT_SYMBOL(hdmi_vendor_infoframe_init);
551
hdmi_vendor_infoframe_length(const struct hdmi_vendor_infoframe * frame)552 static 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
hdmi_vendor_infoframe_check_only(const struct hdmi_vendor_infoframe * frame)563 static 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 */
hdmi_vendor_infoframe_check(struct hdmi_vendor_infoframe * frame)589 int 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 }
595 EXPORT_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 */
hdmi_vendor_infoframe_pack_only(const struct hdmi_vendor_infoframe * frame,void * buffer,size_t size)611 ssize_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 }
655 EXPORT_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 */
hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe * frame,void * buffer,size_t size)674 ssize_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 }
685 EXPORT_SYMBOL(hdmi_vendor_infoframe_pack);
686
687 static int
hdmi_vendor_any_infoframe_check_only(const union hdmi_vendor_any_infoframe * frame)688 hdmi_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 */
hdmi_drm_infoframe_init(struct hdmi_drm_infoframe * frame)704 int 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 }
714 EXPORT_SYMBOL(hdmi_drm_infoframe_init);
715
hdmi_drm_infoframe_check_only(const struct hdmi_drm_infoframe * frame)716 static 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 */
hdmi_drm_infoframe_check(struct hdmi_drm_infoframe * frame)735 int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame)
736 {
737 return hdmi_drm_infoframe_check_only(frame);
738 }
739 EXPORT_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 */
hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe * frame,void * buffer,size_t size)755 ssize_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 }
809 EXPORT_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 */
hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe * frame,void * buffer,size_t size)828 ssize_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 }
839 EXPORT_SYMBOL(hdmi_drm_infoframe_pack);
840
841 /*
842 * hdmi_vendor_any_infoframe_check() - check a vendor infoframe
843 */
844 static int
hdmi_vendor_any_infoframe_check(union hdmi_vendor_any_infoframe * frame)845 hdmi_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 */
863 static ssize_t
hdmi_vendor_any_infoframe_pack_only(const union hdmi_vendor_any_infoframe * frame,void * buffer,size_t size)864 hdmi_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 */
884 static ssize_t
hdmi_vendor_any_infoframe_pack(union hdmi_vendor_any_infoframe * frame,void * buffer,size_t size)885 hdmi_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 */
906 int
hdmi_infoframe_check(union hdmi_infoframe * frame)907 hdmi_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 }
923 EXPORT_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 */
939 ssize_t
hdmi_infoframe_pack_only(const union hdmi_infoframe * frame,void * buffer,size_t size)940 hdmi_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 }
972 EXPORT_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 */
991 ssize_t
hdmi_infoframe_pack(union hdmi_infoframe * frame,void * buffer,size_t size)992 hdmi_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 }
1021 EXPORT_SYMBOL(hdmi_infoframe_pack);
1022
hdmi_infoframe_type_get_name(enum hdmi_infoframe_type type)1023 static 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
hdmi_infoframe_log_header(const char * level,struct device * dev,const struct hdmi_any_infoframe * frame)1042 static 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
hdmi_colorspace_get_name(enum hdmi_colorspace colorspace)1051 static 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
hdmi_scan_mode_get_name(enum hdmi_scan_mode scan_mode)1074 static 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
hdmi_colorimetry_get_name(enum hdmi_colorimetry colorimetry)1089 static 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
1104 static const char *
hdmi_picture_aspect_get_name(enum hdmi_picture_aspect picture_aspect)1105 hdmi_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
1124 static const char *
hdmi_active_aspect_get_name(enum hdmi_active_aspect active_aspect)1125 hdmi_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
1155 static const char *
hdmi_extended_colorimetry_get_name(enum hdmi_extended_colorimetry ext_col)1156 hdmi_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
1179 static const char *
hdmi_quantization_range_get_name(enum hdmi_quantization_range qrange)1180 hdmi_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
hdmi_nups_get_name(enum hdmi_nups nups)1195 static 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
1210 static const char *
hdmi_ycc_quantization_range_get_name(enum hdmi_ycc_quantization_range qrange)1211 hdmi_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
1222 static const char *
hdmi_content_type_get_name(enum hdmi_content_type content_type)1223 hdmi_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
hdmi_avi_infoframe_log(const char * level,struct device * dev,const struct hdmi_avi_infoframe * frame)1238 static 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
hdmi_spd_sdi_get_name(enum hdmi_spd_sdi sdi)1272 static 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
hdmi_spd_infoframe_log(const char * level,struct device * dev,const struct hdmi_spd_infoframe * frame)1309 static void hdmi_spd_infoframe_log(const char *level,
1310 struct device *dev,
1311 const struct hdmi_spd_infoframe *frame)
1312 {
1313 u8 buf[17];
1314
1315 hdmi_infoframe_log_header(level, dev,
1316 (const struct hdmi_any_infoframe *)frame);
1317
1318 memset(buf, 0, sizeof(buf));
1319
1320 strncpy(buf, frame->vendor, 8);
1321 hdmi_log(" vendor: %s\n", buf);
1322 strncpy(buf, frame->product, 16);
1323 hdmi_log(" product: %s\n", buf);
1324 hdmi_log(" source device information: %s (0x%x)\n",
1325 hdmi_spd_sdi_get_name(frame->sdi), frame->sdi);
1326 }
1327
1328 static const char *
hdmi_audio_coding_type_get_name(enum hdmi_audio_coding_type coding_type)1329 hdmi_audio_coding_type_get_name(enum hdmi_audio_coding_type coding_type)
1330 {
1331 switch (coding_type) {
1332 case HDMI_AUDIO_CODING_TYPE_STREAM:
1333 return "Refer to Stream Header";
1334 case HDMI_AUDIO_CODING_TYPE_PCM:
1335 return "PCM";
1336 case HDMI_AUDIO_CODING_TYPE_AC3:
1337 return "AC-3";
1338 case HDMI_AUDIO_CODING_TYPE_MPEG1:
1339 return "MPEG1";
1340 case HDMI_AUDIO_CODING_TYPE_MP3:
1341 return "MP3";
1342 case HDMI_AUDIO_CODING_TYPE_MPEG2:
1343 return "MPEG2";
1344 case HDMI_AUDIO_CODING_TYPE_AAC_LC:
1345 return "AAC";
1346 case HDMI_AUDIO_CODING_TYPE_DTS:
1347 return "DTS";
1348 case HDMI_AUDIO_CODING_TYPE_ATRAC:
1349 return "ATRAC";
1350 case HDMI_AUDIO_CODING_TYPE_DSD:
1351 return "One Bit Audio";
1352 case HDMI_AUDIO_CODING_TYPE_EAC3:
1353 return "Dolby Digital +";
1354 case HDMI_AUDIO_CODING_TYPE_DTS_HD:
1355 return "DTS-HD";
1356 case HDMI_AUDIO_CODING_TYPE_MLP:
1357 return "MAT (MLP)";
1358 case HDMI_AUDIO_CODING_TYPE_DST:
1359 return "DST";
1360 case HDMI_AUDIO_CODING_TYPE_WMA_PRO:
1361 return "WMA PRO";
1362 case HDMI_AUDIO_CODING_TYPE_CXT:
1363 return "Refer to CXT";
1364 }
1365 return "Invalid";
1366 }
1367
1368 static const char *
hdmi_audio_sample_size_get_name(enum hdmi_audio_sample_size sample_size)1369 hdmi_audio_sample_size_get_name(enum hdmi_audio_sample_size sample_size)
1370 {
1371 switch (sample_size) {
1372 case HDMI_AUDIO_SAMPLE_SIZE_STREAM:
1373 return "Refer to Stream Header";
1374 case HDMI_AUDIO_SAMPLE_SIZE_16:
1375 return "16 bit";
1376 case HDMI_AUDIO_SAMPLE_SIZE_20:
1377 return "20 bit";
1378 case HDMI_AUDIO_SAMPLE_SIZE_24:
1379 return "24 bit";
1380 }
1381 return "Invalid";
1382 }
1383
1384 static const char *
hdmi_audio_sample_frequency_get_name(enum hdmi_audio_sample_frequency freq)1385 hdmi_audio_sample_frequency_get_name(enum hdmi_audio_sample_frequency freq)
1386 {
1387 switch (freq) {
1388 case HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM:
1389 return "Refer to Stream Header";
1390 case HDMI_AUDIO_SAMPLE_FREQUENCY_32000:
1391 return "32 kHz";
1392 case HDMI_AUDIO_SAMPLE_FREQUENCY_44100:
1393 return "44.1 kHz (CD)";
1394 case HDMI_AUDIO_SAMPLE_FREQUENCY_48000:
1395 return "48 kHz";
1396 case HDMI_AUDIO_SAMPLE_FREQUENCY_88200:
1397 return "88.2 kHz";
1398 case HDMI_AUDIO_SAMPLE_FREQUENCY_96000:
1399 return "96 kHz";
1400 case HDMI_AUDIO_SAMPLE_FREQUENCY_176400:
1401 return "176.4 kHz";
1402 case HDMI_AUDIO_SAMPLE_FREQUENCY_192000:
1403 return "192 kHz";
1404 }
1405 return "Invalid";
1406 }
1407
1408 static const char *
hdmi_audio_coding_type_ext_get_name(enum hdmi_audio_coding_type_ext ctx)1409 hdmi_audio_coding_type_ext_get_name(enum hdmi_audio_coding_type_ext ctx)
1410 {
1411 if (ctx < 0 || ctx > 0x1f)
1412 return "Invalid";
1413
1414 switch (ctx) {
1415 case HDMI_AUDIO_CODING_TYPE_EXT_CT:
1416 return "Refer to CT";
1417 case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC:
1418 return "HE AAC";
1419 case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC_V2:
1420 return "HE AAC v2";
1421 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG_SURROUND:
1422 return "MPEG SURROUND";
1423 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC:
1424 return "MPEG-4 HE AAC";
1425 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_V2:
1426 return "MPEG-4 HE AAC v2";
1427 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC:
1428 return "MPEG-4 AAC LC";
1429 case HDMI_AUDIO_CODING_TYPE_EXT_DRA:
1430 return "DRA";
1431 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_SURROUND:
1432 return "MPEG-4 HE AAC + MPEG Surround";
1433 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC_SURROUND:
1434 return "MPEG-4 AAC LC + MPEG Surround";
1435 }
1436 return "Reserved";
1437 }
1438
hdmi_audio_infoframe_log(const char * level,struct device * dev,const struct hdmi_audio_infoframe * frame)1439 static void hdmi_audio_infoframe_log(const char *level,
1440 struct device *dev,
1441 const struct hdmi_audio_infoframe *frame)
1442 {
1443 hdmi_infoframe_log_header(level, dev,
1444 (const struct hdmi_any_infoframe *)frame);
1445
1446 if (frame->channels)
1447 hdmi_log(" channels: %u\n", frame->channels - 1);
1448 else
1449 hdmi_log(" channels: Refer to stream header\n");
1450 hdmi_log(" coding type: %s\n",
1451 hdmi_audio_coding_type_get_name(frame->coding_type));
1452 hdmi_log(" sample size: %s\n",
1453 hdmi_audio_sample_size_get_name(frame->sample_size));
1454 hdmi_log(" sample frequency: %s\n",
1455 hdmi_audio_sample_frequency_get_name(frame->sample_frequency));
1456 hdmi_log(" coding type ext: %s\n",
1457 hdmi_audio_coding_type_ext_get_name(frame->coding_type_ext));
1458 hdmi_log(" channel allocation: 0x%x\n",
1459 frame->channel_allocation);
1460 hdmi_log(" level shift value: %u dB\n",
1461 frame->level_shift_value);
1462 hdmi_log(" downmix inhibit: %s\n",
1463 frame->downmix_inhibit ? "Yes" : "No");
1464 }
1465
hdmi_drm_infoframe_log(const char * level,struct device * dev,const struct hdmi_drm_infoframe * frame)1466 static void hdmi_drm_infoframe_log(const char *level,
1467 struct device *dev,
1468 const struct hdmi_drm_infoframe *frame)
1469 {
1470 int i;
1471
1472 hdmi_infoframe_log_header(level, dev,
1473 (struct hdmi_any_infoframe *)frame);
1474 hdmi_log("length: %d\n", frame->length);
1475 hdmi_log("metadata type: %d\n", frame->metadata_type);
1476 hdmi_log("eotf: %d\n", frame->eotf);
1477 for (i = 0; i < 3; i++) {
1478 hdmi_log("x[%d]: %d\n", i, frame->display_primaries[i].x);
1479 hdmi_log("y[%d]: %d\n", i, frame->display_primaries[i].y);
1480 }
1481
1482 hdmi_log("white point x: %d\n", frame->white_point.x);
1483 hdmi_log("white point y: %d\n", frame->white_point.y);
1484
1485 hdmi_log("max_display_mastering_luminance: %d\n",
1486 frame->max_display_mastering_luminance);
1487 hdmi_log("min_display_mastering_luminance: %d\n",
1488 frame->min_display_mastering_luminance);
1489
1490 hdmi_log("max_cll: %d\n", frame->max_cll);
1491 hdmi_log("max_fall: %d\n", frame->max_fall);
1492 }
1493
1494 static const char *
hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct)1495 hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct)
1496 {
1497 if (s3d_struct < 0 || s3d_struct > 0xf)
1498 return "Invalid";
1499
1500 switch (s3d_struct) {
1501 case HDMI_3D_STRUCTURE_FRAME_PACKING:
1502 return "Frame Packing";
1503 case HDMI_3D_STRUCTURE_FIELD_ALTERNATIVE:
1504 return "Field Alternative";
1505 case HDMI_3D_STRUCTURE_LINE_ALTERNATIVE:
1506 return "Line Alternative";
1507 case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_FULL:
1508 return "Side-by-side (Full)";
1509 case HDMI_3D_STRUCTURE_L_DEPTH:
1510 return "L + Depth";
1511 case HDMI_3D_STRUCTURE_L_DEPTH_GFX_GFX_DEPTH:
1512 return "L + Depth + Graphics + Graphics-depth";
1513 case HDMI_3D_STRUCTURE_TOP_AND_BOTTOM:
1514 return "Top-and-Bottom";
1515 case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF:
1516 return "Side-by-side (Half)";
1517 default:
1518 break;
1519 }
1520 return "Reserved";
1521 }
1522
1523 static void
hdmi_vendor_any_infoframe_log(const char * level,struct device * dev,const union hdmi_vendor_any_infoframe * frame)1524 hdmi_vendor_any_infoframe_log(const char *level,
1525 struct device *dev,
1526 const union hdmi_vendor_any_infoframe *frame)
1527 {
1528 const struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
1529
1530 hdmi_infoframe_log_header(level, dev,
1531 (const struct hdmi_any_infoframe *)frame);
1532
1533 if (frame->any.oui != HDMI_IEEE_OUI) {
1534 hdmi_log(" not a HDMI vendor infoframe\n");
1535 return;
1536 }
1537 if (hvf->vic == 0 && hvf->s3d_struct == HDMI_3D_STRUCTURE_INVALID) {
1538 hdmi_log(" empty frame\n");
1539 return;
1540 }
1541
1542 if (hvf->vic)
1543 hdmi_log(" HDMI VIC: %u\n", hvf->vic);
1544 if (hvf->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
1545 hdmi_log(" 3D structure: %s\n",
1546 hdmi_3d_structure_get_name(hvf->s3d_struct));
1547 if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
1548 hdmi_log(" 3D extension data: %d\n",
1549 hvf->s3d_ext_data);
1550 }
1551 }
1552
1553 /**
1554 * hdmi_infoframe_log() - log info of HDMI infoframe
1555 * @level: logging level
1556 * @dev: device
1557 * @frame: HDMI infoframe
1558 */
hdmi_infoframe_log(const char * level,struct device * dev,const union hdmi_infoframe * frame)1559 void hdmi_infoframe_log(const char *level,
1560 struct device *dev,
1561 const union hdmi_infoframe *frame)
1562 {
1563 switch (frame->any.type) {
1564 case HDMI_INFOFRAME_TYPE_AVI:
1565 hdmi_avi_infoframe_log(level, dev, &frame->avi);
1566 break;
1567 case HDMI_INFOFRAME_TYPE_SPD:
1568 hdmi_spd_infoframe_log(level, dev, &frame->spd);
1569 break;
1570 case HDMI_INFOFRAME_TYPE_AUDIO:
1571 hdmi_audio_infoframe_log(level, dev, &frame->audio);
1572 break;
1573 case HDMI_INFOFRAME_TYPE_VENDOR:
1574 hdmi_vendor_any_infoframe_log(level, dev, &frame->vendor);
1575 break;
1576 case HDMI_INFOFRAME_TYPE_DRM:
1577 hdmi_drm_infoframe_log(level, dev, &frame->drm);
1578 break;
1579 }
1580 }
1581 EXPORT_SYMBOL(hdmi_infoframe_log);
1582
1583 /**
1584 * hdmi_avi_infoframe_unpack() - unpack binary buffer to a HDMI AVI infoframe
1585 * @frame: HDMI AVI infoframe
1586 * @buffer: source buffer
1587 * @size: size of buffer
1588 *
1589 * Unpacks the information contained in binary @buffer into a structured
1590 * @frame of the HDMI Auxiliary Video (AVI) information frame.
1591 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1592 * specification.
1593 *
1594 * Returns 0 on success or a negative error code on failure.
1595 */
hdmi_avi_infoframe_unpack(struct hdmi_avi_infoframe * frame,const void * buffer,size_t size)1596 static int hdmi_avi_infoframe_unpack(struct hdmi_avi_infoframe *frame,
1597 const void *buffer, size_t size)
1598 {
1599 const u8 *ptr = buffer;
1600
1601 if (size < HDMI_INFOFRAME_SIZE(AVI))
1602 return -EINVAL;
1603
1604 if (ptr[0] != HDMI_INFOFRAME_TYPE_AVI ||
1605 ptr[1] != 2 ||
1606 ptr[2] != HDMI_AVI_INFOFRAME_SIZE)
1607 return -EINVAL;
1608
1609 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AVI)) != 0)
1610 return -EINVAL;
1611
1612 hdmi_avi_infoframe_init(frame);
1613
1614 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1615
1616 frame->colorspace = (ptr[0] >> 5) & 0x3;
1617 if (ptr[0] & 0x10)
1618 frame->active_aspect = ptr[1] & 0xf;
1619 if (ptr[0] & 0x8) {
1620 frame->top_bar = (ptr[6] << 8) | ptr[5];
1621 frame->bottom_bar = (ptr[8] << 8) | ptr[7];
1622 }
1623 if (ptr[0] & 0x4) {
1624 frame->left_bar = (ptr[10] << 8) | ptr[9];
1625 frame->right_bar = (ptr[12] << 8) | ptr[11];
1626 }
1627 frame->scan_mode = ptr[0] & 0x3;
1628
1629 frame->colorimetry = (ptr[1] >> 6) & 0x3;
1630 frame->picture_aspect = (ptr[1] >> 4) & 0x3;
1631 frame->active_aspect = ptr[1] & 0xf;
1632
1633 frame->itc = ptr[2] & 0x80 ? true : false;
1634 frame->extended_colorimetry = (ptr[2] >> 4) & 0x7;
1635 frame->quantization_range = (ptr[2] >> 2) & 0x3;
1636 frame->nups = ptr[2] & 0x3;
1637
1638 frame->video_code = ptr[3] & 0x7f;
1639 frame->ycc_quantization_range = (ptr[4] >> 6) & 0x3;
1640 frame->content_type = (ptr[4] >> 4) & 0x3;
1641
1642 frame->pixel_repeat = ptr[4] & 0xf;
1643
1644 return 0;
1645 }
1646
1647 /**
1648 * hdmi_spd_infoframe_unpack() - unpack binary buffer to a HDMI SPD infoframe
1649 * @frame: HDMI SPD infoframe
1650 * @buffer: source buffer
1651 * @size: size of buffer
1652 *
1653 * Unpacks the information contained in binary @buffer into a structured
1654 * @frame of the HDMI Source Product Description (SPD) information frame.
1655 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1656 * specification.
1657 *
1658 * Returns 0 on success or a negative error code on failure.
1659 */
hdmi_spd_infoframe_unpack(struct hdmi_spd_infoframe * frame,const void * buffer,size_t size)1660 static int hdmi_spd_infoframe_unpack(struct hdmi_spd_infoframe *frame,
1661 const void *buffer, size_t size)
1662 {
1663 const u8 *ptr = buffer;
1664 int ret;
1665
1666 if (size < HDMI_INFOFRAME_SIZE(SPD))
1667 return -EINVAL;
1668
1669 if (ptr[0] != HDMI_INFOFRAME_TYPE_SPD ||
1670 ptr[1] != 1 ||
1671 ptr[2] != HDMI_SPD_INFOFRAME_SIZE) {
1672 return -EINVAL;
1673 }
1674
1675 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(SPD)) != 0)
1676 return -EINVAL;
1677
1678 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1679
1680 ret = hdmi_spd_infoframe_init(frame, ptr, ptr + 8);
1681 if (ret)
1682 return ret;
1683
1684 frame->sdi = ptr[24];
1685
1686 return 0;
1687 }
1688
1689 /**
1690 * hdmi_audio_infoframe_unpack() - unpack binary buffer to a HDMI AUDIO infoframe
1691 * @frame: HDMI Audio infoframe
1692 * @buffer: source buffer
1693 * @size: size of buffer
1694 *
1695 * Unpacks the information contained in binary @buffer into a structured
1696 * @frame of the HDMI Audio information frame.
1697 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1698 * specification.
1699 *
1700 * Returns 0 on success or a negative error code on failure.
1701 */
hdmi_audio_infoframe_unpack(struct hdmi_audio_infoframe * frame,const void * buffer,size_t size)1702 static int hdmi_audio_infoframe_unpack(struct hdmi_audio_infoframe *frame,
1703 const void *buffer, size_t size)
1704 {
1705 const u8 *ptr = buffer;
1706 int ret;
1707
1708 if (size < HDMI_INFOFRAME_SIZE(AUDIO))
1709 return -EINVAL;
1710
1711 if (ptr[0] != HDMI_INFOFRAME_TYPE_AUDIO ||
1712 ptr[1] != 1 ||
1713 ptr[2] != HDMI_AUDIO_INFOFRAME_SIZE) {
1714 return -EINVAL;
1715 }
1716
1717 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AUDIO)) != 0)
1718 return -EINVAL;
1719
1720 ret = hdmi_audio_infoframe_init(frame);
1721 if (ret)
1722 return ret;
1723
1724 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1725
1726 frame->channels = ptr[0] & 0x7;
1727 frame->coding_type = (ptr[0] >> 4) & 0xf;
1728 frame->sample_size = ptr[1] & 0x3;
1729 frame->sample_frequency = (ptr[1] >> 2) & 0x7;
1730 frame->coding_type_ext = ptr[2] & 0x1f;
1731 frame->channel_allocation = ptr[3];
1732 frame->level_shift_value = (ptr[4] >> 3) & 0xf;
1733 frame->downmix_inhibit = ptr[4] & 0x80 ? true : false;
1734
1735 return 0;
1736 }
1737
1738 /**
1739 * hdmi_vendor_any_infoframe_unpack() - unpack binary buffer to a HDMI
1740 * vendor infoframe
1741 * @frame: HDMI Vendor infoframe
1742 * @buffer: source buffer
1743 * @size: size of buffer
1744 *
1745 * Unpacks the information contained in binary @buffer into a structured
1746 * @frame of the HDMI Vendor information frame.
1747 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1748 * specification.
1749 *
1750 * Returns 0 on success or a negative error code on failure.
1751 */
1752 static int
hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe * frame,const void * buffer,size_t size)1753 hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame,
1754 const void *buffer, size_t size)
1755 {
1756 const u8 *ptr = buffer;
1757 size_t length;
1758 int ret;
1759 u8 hdmi_video_format;
1760 struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
1761
1762 if (size < HDMI_INFOFRAME_HEADER_SIZE)
1763 return -EINVAL;
1764
1765 if (ptr[0] != HDMI_INFOFRAME_TYPE_VENDOR ||
1766 ptr[1] != 1 ||
1767 (ptr[2] != 4 && ptr[2] != 5 && ptr[2] != 6))
1768 return -EINVAL;
1769
1770 length = ptr[2];
1771
1772 if (size < HDMI_INFOFRAME_HEADER_SIZE + length)
1773 return -EINVAL;
1774
1775 if (hdmi_infoframe_checksum(buffer,
1776 HDMI_INFOFRAME_HEADER_SIZE + length) != 0)
1777 return -EINVAL;
1778
1779 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1780
1781 /* HDMI OUI */
1782 if ((ptr[0] != 0x03) ||
1783 (ptr[1] != 0x0c) ||
1784 (ptr[2] != 0x00))
1785 return -EINVAL;
1786
1787 hdmi_video_format = ptr[3] >> 5;
1788
1789 if (hdmi_video_format > 0x2)
1790 return -EINVAL;
1791
1792 ret = hdmi_vendor_infoframe_init(hvf);
1793 if (ret)
1794 return ret;
1795
1796 hvf->length = length;
1797
1798 if (hdmi_video_format == 0x2) {
1799 if (length != 5 && length != 6)
1800 return -EINVAL;
1801 hvf->s3d_struct = ptr[4] >> 4;
1802 if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF) {
1803 if (length != 6)
1804 return -EINVAL;
1805 hvf->s3d_ext_data = ptr[5] >> 4;
1806 }
1807 } else if (hdmi_video_format == 0x1) {
1808 if (length != 5)
1809 return -EINVAL;
1810 hvf->vic = ptr[4];
1811 } else {
1812 if (length != 4)
1813 return -EINVAL;
1814 }
1815
1816 return 0;
1817 }
1818
1819 /**
1820 * hdmi_drm_infoframe_unpack_only() - unpack binary buffer of CTA-861-G DRM
1821 * infoframe DataBytes to a HDMI DRM
1822 * infoframe
1823 * @frame: HDMI DRM infoframe
1824 * @buffer: source buffer
1825 * @size: size of buffer
1826 *
1827 * Unpacks CTA-861-G DRM infoframe DataBytes contained in the binary @buffer
1828 * into a structured @frame of the HDMI Dynamic Range and Mastering (DRM)
1829 * infoframe.
1830 *
1831 * Returns 0 on success or a negative error code on failure.
1832 */
hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe * frame,const void * buffer,size_t size)1833 int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe *frame,
1834 const void *buffer, size_t size)
1835 {
1836 const u8 *ptr = buffer;
1837 const u8 *temp;
1838 u8 x_lsb, x_msb;
1839 u8 y_lsb, y_msb;
1840 int ret;
1841 int i;
1842
1843 if (size < HDMI_DRM_INFOFRAME_SIZE)
1844 return -EINVAL;
1845
1846 ret = hdmi_drm_infoframe_init(frame);
1847 if (ret)
1848 return ret;
1849
1850 frame->eotf = ptr[0] & 0x7;
1851 frame->metadata_type = ptr[1] & 0x7;
1852
1853 temp = ptr + 2;
1854 for (i = 0; i < 3; i++) {
1855 x_lsb = *temp++;
1856 x_msb = *temp++;
1857 frame->display_primaries[i].x = (x_msb << 8) | x_lsb;
1858 y_lsb = *temp++;
1859 y_msb = *temp++;
1860 frame->display_primaries[i].y = (y_msb << 8) | y_lsb;
1861 }
1862
1863 frame->white_point.x = (ptr[15] << 8) | ptr[14];
1864 frame->white_point.y = (ptr[17] << 8) | ptr[16];
1865
1866 frame->max_display_mastering_luminance = (ptr[19] << 8) | ptr[18];
1867 frame->min_display_mastering_luminance = (ptr[21] << 8) | ptr[20];
1868 frame->max_cll = (ptr[23] << 8) | ptr[22];
1869 frame->max_fall = (ptr[25] << 8) | ptr[24];
1870
1871 return 0;
1872 }
1873 EXPORT_SYMBOL(hdmi_drm_infoframe_unpack_only);
1874
1875 /**
1876 * hdmi_drm_infoframe_unpack() - unpack binary buffer to a HDMI DRM infoframe
1877 * @frame: HDMI DRM infoframe
1878 * @buffer: source buffer
1879 * @size: size of buffer
1880 *
1881 * Unpacks the CTA-861-G DRM infoframe contained in the binary @buffer into
1882 * a structured @frame of the HDMI Dynamic Range and Mastering (DRM)
1883 * infoframe. It also verifies the checksum as required by section 5.3.5 of
1884 * the HDMI 1.4 specification.
1885 *
1886 * Returns 0 on success or a negative error code on failure.
1887 */
hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe * frame,const void * buffer,size_t size)1888 static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
1889 const void *buffer, size_t size)
1890 {
1891 const u8 *ptr = buffer;
1892 int ret;
1893
1894 if (size < HDMI_INFOFRAME_SIZE(DRM))
1895 return -EINVAL;
1896
1897 if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
1898 ptr[1] != 1 ||
1899 ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
1900 return -EINVAL;
1901
1902 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(DRM)) != 0)
1903 return -EINVAL;
1904
1905 ret = hdmi_drm_infoframe_unpack_only(frame, ptr + HDMI_INFOFRAME_HEADER_SIZE,
1906 size - HDMI_INFOFRAME_HEADER_SIZE);
1907 return ret;
1908 }
1909
1910 /**
1911 * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe
1912 * @frame: HDMI infoframe
1913 * @buffer: source buffer
1914 * @size: size of buffer
1915 *
1916 * Unpacks the information contained in binary buffer @buffer into a structured
1917 * @frame of a HDMI infoframe.
1918 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1919 * specification.
1920 *
1921 * Returns 0 on success or a negative error code on failure.
1922 */
hdmi_infoframe_unpack(union hdmi_infoframe * frame,const void * buffer,size_t size)1923 int hdmi_infoframe_unpack(union hdmi_infoframe *frame,
1924 const void *buffer, size_t size)
1925 {
1926 int ret;
1927 const u8 *ptr = buffer;
1928
1929 if (size < HDMI_INFOFRAME_HEADER_SIZE)
1930 return -EINVAL;
1931
1932 switch (ptr[0]) {
1933 case HDMI_INFOFRAME_TYPE_AVI:
1934 ret = hdmi_avi_infoframe_unpack(&frame->avi, buffer, size);
1935 break;
1936 case HDMI_INFOFRAME_TYPE_DRM:
1937 ret = hdmi_drm_infoframe_unpack(&frame->drm, buffer, size);
1938 break;
1939 case HDMI_INFOFRAME_TYPE_SPD:
1940 ret = hdmi_spd_infoframe_unpack(&frame->spd, buffer, size);
1941 break;
1942 case HDMI_INFOFRAME_TYPE_AUDIO:
1943 ret = hdmi_audio_infoframe_unpack(&frame->audio, buffer, size);
1944 break;
1945 case HDMI_INFOFRAME_TYPE_VENDOR:
1946 ret = hdmi_vendor_any_infoframe_unpack(&frame->vendor, buffer, size);
1947 break;
1948 default:
1949 ret = -EINVAL;
1950 break;
1951 }
1952
1953 return ret;
1954 }
1955 EXPORT_SYMBOL(hdmi_infoframe_unpack);
1956