Merge tag 'soc-ep93xx-dt-6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
[linux-2.6-block.git] / drivers / video / hdmi.c
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
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
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  */
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
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  */
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  */
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  */
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  */
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
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  */
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  */
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  */
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  */
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
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  */
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
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  */
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  */
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
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  */
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
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
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  */
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  */
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  */
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
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  */
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
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  */
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  */
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  */
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
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
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
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
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
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
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
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
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
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
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
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 *
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 *
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 *
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 *
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
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 *
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 *
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
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
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
1309 static 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
1322 static const char *
1323 hdmi_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
1362 static const char *
1363 hdmi_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
1378 static const char *
1379 hdmi_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
1402 static const char *
1403 hdmi_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
1433 static 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
1460 static 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
1488 static const char *
1489 hdmi_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
1517 static void
1518 hdmi_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  */
1553 void 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 }
1575 EXPORT_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  */
1590 static 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  */
1654 static 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  */
1696 static 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  */
1746 static int
1747 hdmi_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  */
1827 int 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 }
1867 EXPORT_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  */
1882 static 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  */
1917 int 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 }
1949 EXPORT_SYMBOL(hdmi_infoframe_unpack);