xref: /openbmc/linux/drivers/video/hdmi.c (revision 519b58bb)
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 	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 *
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 *
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 *
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 *
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 
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 
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 *
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
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  */
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  */
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  */
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  */
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
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  */
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  */
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  */
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