2 * Copyright (C) 2012 Avionic Design GmbH
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:
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
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.
24 #include <linux/bitops.h>
25 #include <linux/bug.h>
26 #include <linux/errno.h>
27 #include <linux/export.h>
28 #include <linux/hdmi.h>
29 #include <linux/string.h>
30 #include <linux/device.h>
32 #define hdmi_log(fmt, ...) dev_printk(level, dev, fmt, ##__VA_ARGS__)
34 static u8 hdmi_infoframe_checksum(const u8 *ptr, size_t size)
39 /* compute checksum */
40 for (i = 0; i < size; i++)
46 static void hdmi_infoframe_set_checksum(void *buffer, size_t size)
50 ptr[3] = hdmi_infoframe_checksum(buffer, size);
54 * hdmi_avi_infoframe_init() - initialize an HDMI AVI infoframe
55 * @frame: HDMI AVI infoframe
57 * Returns 0 on success or a negative error code on failure.
59 int hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame)
61 memset(frame, 0, sizeof(*frame));
63 frame->type = HDMI_INFOFRAME_TYPE_AVI;
65 frame->length = HDMI_AVI_INFOFRAME_SIZE;
69 EXPORT_SYMBOL(hdmi_avi_infoframe_init);
71 static int hdmi_avi_infoframe_check_only(const struct hdmi_avi_infoframe *frame)
73 if (frame->type != HDMI_INFOFRAME_TYPE_AVI ||
74 frame->version != 2 ||
75 frame->length != HDMI_AVI_INFOFRAME_SIZE)
78 if (frame->picture_aspect > HDMI_PICTURE_ASPECT_16_9)
85 * hdmi_avi_infoframe_check() - check a HDMI AVI infoframe
86 * @frame: HDMI AVI infoframe
88 * Validates that the infoframe is consistent and updates derived fields
89 * (eg. length) based on other fields.
91 * Returns 0 on success or a negative error code on failure.
93 int hdmi_avi_infoframe_check(struct hdmi_avi_infoframe *frame)
95 return hdmi_avi_infoframe_check_only(frame);
97 EXPORT_SYMBOL(hdmi_avi_infoframe_check);
100 * hdmi_avi_infoframe_pack_only() - write HDMI AVI infoframe to binary buffer
101 * @frame: HDMI AVI infoframe
102 * @buffer: destination buffer
103 * @size: size of buffer
105 * Packs the information contained in the @frame structure into a binary
106 * representation that can be written into the corresponding controller
107 * registers. Also computes the checksum as required by section 5.3.5 of
108 * the HDMI 1.4 specification.
110 * Returns the number of bytes packed into the binary buffer or a negative
111 * error code on failure.
113 ssize_t hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe *frame,
114 void *buffer, size_t size)
120 ret = hdmi_avi_infoframe_check_only(frame);
124 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
129 memset(buffer, 0, size);
131 ptr[0] = frame->type;
132 ptr[1] = frame->version;
133 ptr[2] = frame->length;
134 ptr[3] = 0; /* checksum */
136 /* start infoframe payload */
137 ptr += HDMI_INFOFRAME_HEADER_SIZE;
139 ptr[0] = ((frame->colorspace & 0x3) << 5) | (frame->scan_mode & 0x3);
142 * Data byte 1, bit 4 has to be set if we provide the active format
145 if (frame->active_aspect & 0xf)
148 /* Bit 3 and 2 indicate if we transmit horizontal/vertical bar data */
149 if (frame->top_bar || frame->bottom_bar)
152 if (frame->left_bar || frame->right_bar)
155 ptr[1] = ((frame->colorimetry & 0x3) << 6) |
156 ((frame->picture_aspect & 0x3) << 4) |
157 (frame->active_aspect & 0xf);
159 ptr[2] = ((frame->extended_colorimetry & 0x7) << 4) |
160 ((frame->quantization_range & 0x3) << 2) |
166 ptr[3] = frame->video_code & 0x7f;
168 ptr[4] = ((frame->ycc_quantization_range & 0x3) << 6) |
169 ((frame->content_type & 0x3) << 4) |
170 (frame->pixel_repeat & 0xf);
172 ptr[5] = frame->top_bar & 0xff;
173 ptr[6] = (frame->top_bar >> 8) & 0xff;
174 ptr[7] = frame->bottom_bar & 0xff;
175 ptr[8] = (frame->bottom_bar >> 8) & 0xff;
176 ptr[9] = frame->left_bar & 0xff;
177 ptr[10] = (frame->left_bar >> 8) & 0xff;
178 ptr[11] = frame->right_bar & 0xff;
179 ptr[12] = (frame->right_bar >> 8) & 0xff;
181 hdmi_infoframe_set_checksum(buffer, length);
185 EXPORT_SYMBOL(hdmi_avi_infoframe_pack_only);
188 * hdmi_avi_infoframe_pack() - check a HDMI AVI infoframe,
189 * and write it to binary buffer
190 * @frame: HDMI AVI infoframe
191 * @buffer: destination buffer
192 * @size: size of buffer
194 * Validates that the infoframe is consistent and updates derived fields
195 * (eg. length) based on other fields, after which it packs the information
196 * contained in the @frame structure into a binary representation that
197 * can be written into the corresponding controller registers. This function
198 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
201 * Returns the number of bytes packed into the binary buffer or a negative
202 * error code on failure.
204 ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame,
205 void *buffer, size_t size)
209 ret = hdmi_avi_infoframe_check(frame);
213 return hdmi_avi_infoframe_pack_only(frame, buffer, size);
215 EXPORT_SYMBOL(hdmi_avi_infoframe_pack);
218 * hdmi_spd_infoframe_init() - initialize an HDMI SPD infoframe
219 * @frame: HDMI SPD infoframe
220 * @vendor: vendor string
221 * @product: product string
223 * Returns 0 on success or a negative error code on failure.
225 int hdmi_spd_infoframe_init(struct hdmi_spd_infoframe *frame,
226 const char *vendor, const char *product)
228 memset(frame, 0, sizeof(*frame));
230 frame->type = HDMI_INFOFRAME_TYPE_SPD;
232 frame->length = HDMI_SPD_INFOFRAME_SIZE;
234 strncpy(frame->vendor, vendor, sizeof(frame->vendor));
235 strncpy(frame->product, product, sizeof(frame->product));
239 EXPORT_SYMBOL(hdmi_spd_infoframe_init);
241 static int hdmi_spd_infoframe_check_only(const struct hdmi_spd_infoframe *frame)
243 if (frame->type != HDMI_INFOFRAME_TYPE_SPD ||
244 frame->version != 1 ||
245 frame->length != HDMI_SPD_INFOFRAME_SIZE)
252 * hdmi_spd_infoframe_check() - check a HDMI SPD infoframe
253 * @frame: HDMI SPD infoframe
255 * Validates that the infoframe is consistent and updates derived fields
256 * (eg. length) based on other fields.
258 * Returns 0 on success or a negative error code on failure.
260 int hdmi_spd_infoframe_check(struct hdmi_spd_infoframe *frame)
262 return hdmi_spd_infoframe_check_only(frame);
264 EXPORT_SYMBOL(hdmi_spd_infoframe_check);
267 * hdmi_spd_infoframe_pack_only() - write HDMI SPD infoframe to binary buffer
268 * @frame: HDMI SPD infoframe
269 * @buffer: destination buffer
270 * @size: size of buffer
272 * Packs the information contained in the @frame structure into a binary
273 * representation that can be written into the corresponding controller
274 * registers. Also computes the checksum as required by section 5.3.5 of
275 * the HDMI 1.4 specification.
277 * Returns the number of bytes packed into the binary buffer or a negative
278 * error code on failure.
280 ssize_t hdmi_spd_infoframe_pack_only(const struct hdmi_spd_infoframe *frame,
281 void *buffer, size_t size)
287 ret = hdmi_spd_infoframe_check_only(frame);
291 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
296 memset(buffer, 0, size);
298 ptr[0] = frame->type;
299 ptr[1] = frame->version;
300 ptr[2] = frame->length;
301 ptr[3] = 0; /* checksum */
303 /* start infoframe payload */
304 ptr += HDMI_INFOFRAME_HEADER_SIZE;
306 memcpy(ptr, frame->vendor, sizeof(frame->vendor));
307 memcpy(ptr + 8, frame->product, sizeof(frame->product));
309 ptr[24] = frame->sdi;
311 hdmi_infoframe_set_checksum(buffer, length);
315 EXPORT_SYMBOL(hdmi_spd_infoframe_pack_only);
318 * hdmi_spd_infoframe_pack() - check a HDMI SPD infoframe,
319 * and write it to binary buffer
320 * @frame: HDMI SPD infoframe
321 * @buffer: destination buffer
322 * @size: size of buffer
324 * Validates that the infoframe is consistent and updates derived fields
325 * (eg. length) based on other fields, after which it packs the information
326 * contained in the @frame structure into a binary representation that
327 * can be written into the corresponding controller registers. This function
328 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
331 * Returns the number of bytes packed into the binary buffer or a negative
332 * error code on failure.
334 ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame,
335 void *buffer, size_t size)
339 ret = hdmi_spd_infoframe_check(frame);
343 return hdmi_spd_infoframe_pack_only(frame, buffer, size);
345 EXPORT_SYMBOL(hdmi_spd_infoframe_pack);
348 * hdmi_audio_infoframe_init() - initialize an HDMI audio infoframe
349 * @frame: HDMI audio infoframe
351 * Returns 0 on success or a negative error code on failure.
353 int hdmi_audio_infoframe_init(struct hdmi_audio_infoframe *frame)
355 memset(frame, 0, sizeof(*frame));
357 frame->type = HDMI_INFOFRAME_TYPE_AUDIO;
359 frame->length = HDMI_AUDIO_INFOFRAME_SIZE;
363 EXPORT_SYMBOL(hdmi_audio_infoframe_init);
365 static int hdmi_audio_infoframe_check_only(const struct hdmi_audio_infoframe *frame)
367 if (frame->type != HDMI_INFOFRAME_TYPE_AUDIO ||
368 frame->version != 1 ||
369 frame->length != HDMI_AUDIO_INFOFRAME_SIZE)
376 * hdmi_audio_infoframe_check() - check a HDMI audio infoframe
377 * @frame: HDMI audio infoframe
379 * Validates that the infoframe is consistent and updates derived fields
380 * (eg. length) based on other fields.
382 * Returns 0 on success or a negative error code on failure.
384 int hdmi_audio_infoframe_check(struct hdmi_audio_infoframe *frame)
386 return hdmi_audio_infoframe_check_only(frame);
388 EXPORT_SYMBOL(hdmi_audio_infoframe_check);
391 * hdmi_audio_infoframe_pack_only() - write HDMI audio infoframe to binary buffer
392 * @frame: HDMI audio infoframe
393 * @buffer: destination buffer
394 * @size: size of buffer
396 * Packs the information contained in the @frame structure into a binary
397 * representation that can be written into the corresponding controller
398 * registers. Also computes the checksum as required by section 5.3.5 of
399 * the HDMI 1.4 specification.
401 * Returns the number of bytes packed into the binary buffer or a negative
402 * error code on failure.
404 ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame,
405 void *buffer, size_t size)
407 unsigned char channels;
412 ret = hdmi_audio_infoframe_check_only(frame);
416 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
421 memset(buffer, 0, size);
423 if (frame->channels >= 2)
424 channels = frame->channels - 1;
428 ptr[0] = frame->type;
429 ptr[1] = frame->version;
430 ptr[2] = frame->length;
431 ptr[3] = 0; /* checksum */
433 /* start infoframe payload */
434 ptr += HDMI_INFOFRAME_HEADER_SIZE;
436 ptr[0] = ((frame->coding_type & 0xf) << 4) | (channels & 0x7);
437 ptr[1] = ((frame->sample_frequency & 0x7) << 2) |
438 (frame->sample_size & 0x3);
439 ptr[2] = frame->coding_type_ext & 0x1f;
440 ptr[3] = frame->channel_allocation;
441 ptr[4] = (frame->level_shift_value & 0xf) << 3;
443 if (frame->downmix_inhibit)
446 hdmi_infoframe_set_checksum(buffer, length);
450 EXPORT_SYMBOL(hdmi_audio_infoframe_pack_only);
453 * hdmi_audio_infoframe_pack() - check a HDMI Audio infoframe,
454 * and write it to binary buffer
455 * @frame: HDMI Audio infoframe
456 * @buffer: destination buffer
457 * @size: size of buffer
459 * Validates that the infoframe is consistent and updates derived fields
460 * (eg. length) based on other fields, after which it packs the information
461 * contained in the @frame structure into a binary representation that
462 * can be written into the corresponding controller registers. This function
463 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
466 * Returns the number of bytes packed into the binary buffer or a negative
467 * error code on failure.
469 ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame,
470 void *buffer, size_t size)
474 ret = hdmi_audio_infoframe_check(frame);
478 return hdmi_audio_infoframe_pack_only(frame, buffer, size);
480 EXPORT_SYMBOL(hdmi_audio_infoframe_pack);
483 * hdmi_vendor_infoframe_init() - initialize an HDMI vendor infoframe
484 * @frame: HDMI vendor infoframe
486 * Returns 0 on success or a negative error code on failure.
488 int hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe *frame)
490 memset(frame, 0, sizeof(*frame));
492 frame->type = HDMI_INFOFRAME_TYPE_VENDOR;
495 frame->oui = HDMI_IEEE_OUI;
498 * 0 is a valid value for s3d_struct, so we use a special "not set"
501 frame->s3d_struct = HDMI_3D_STRUCTURE_INVALID;
506 EXPORT_SYMBOL(hdmi_vendor_infoframe_init);
508 static int hdmi_vendor_infoframe_length(const struct hdmi_vendor_infoframe *frame)
510 /* for side by side (half) we also need to provide 3D_Ext_Data */
511 if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
513 else if (frame->vic != 0 || frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
519 static int hdmi_vendor_infoframe_check_only(const struct hdmi_vendor_infoframe *frame)
521 if (frame->type != HDMI_INFOFRAME_TYPE_VENDOR ||
522 frame->version != 1 ||
523 frame->oui != HDMI_IEEE_OUI)
526 /* only one of those can be supplied */
527 if (frame->vic != 0 && frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
530 if (frame->length != hdmi_vendor_infoframe_length(frame))
537 * hdmi_vendor_infoframe_check() - check a HDMI vendor infoframe
538 * @frame: HDMI infoframe
540 * Validates that the infoframe is consistent and updates derived fields
541 * (eg. length) based on other fields.
543 * Returns 0 on success or a negative error code on failure.
545 int hdmi_vendor_infoframe_check(struct hdmi_vendor_infoframe *frame)
547 frame->length = hdmi_vendor_infoframe_length(frame);
549 return hdmi_vendor_infoframe_check_only(frame);
551 EXPORT_SYMBOL(hdmi_vendor_infoframe_check);
554 * hdmi_vendor_infoframe_pack_only() - write a HDMI vendor infoframe to binary buffer
555 * @frame: HDMI infoframe
556 * @buffer: destination buffer
557 * @size: size of buffer
559 * Packs the information contained in the @frame structure into a binary
560 * representation that can be written into the corresponding controller
561 * registers. Also computes the checksum as required by section 5.3.5 of
562 * the HDMI 1.4 specification.
564 * Returns the number of bytes packed into the binary buffer or a negative
565 * error code on failure.
567 ssize_t hdmi_vendor_infoframe_pack_only(const struct hdmi_vendor_infoframe *frame,
568 void *buffer, size_t size)
574 ret = hdmi_vendor_infoframe_check_only(frame);
578 length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
583 memset(buffer, 0, size);
585 ptr[0] = frame->type;
586 ptr[1] = frame->version;
587 ptr[2] = frame->length;
588 ptr[3] = 0; /* checksum */
595 if (frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
596 ptr[7] = 0x2 << 5; /* video format */
597 ptr[8] = (frame->s3d_struct & 0xf) << 4;
598 if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
599 ptr[9] = (frame->s3d_ext_data & 0xf) << 4;
600 } else if (frame->vic) {
601 ptr[7] = 0x1 << 5; /* video format */
604 ptr[7] = 0x0 << 5; /* video format */
607 hdmi_infoframe_set_checksum(buffer, length);
611 EXPORT_SYMBOL(hdmi_vendor_infoframe_pack_only);
614 * hdmi_vendor_infoframe_pack() - check a HDMI Vendor infoframe,
615 * and write it to binary buffer
616 * @frame: HDMI Vendor infoframe
617 * @buffer: destination buffer
618 * @size: size of buffer
620 * Validates that the infoframe is consistent and updates derived fields
621 * (eg. length) based on other fields, after which it packs the information
622 * contained in the @frame structure into a binary representation that
623 * can be written into the corresponding controller registers. This function
624 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
627 * Returns the number of bytes packed into the binary buffer or a negative
628 * error code on failure.
630 ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
631 void *buffer, size_t size)
635 ret = hdmi_vendor_infoframe_check(frame);
639 return hdmi_vendor_infoframe_pack_only(frame, buffer, size);
641 EXPORT_SYMBOL(hdmi_vendor_infoframe_pack);
644 hdmi_vendor_any_infoframe_check_only(const union hdmi_vendor_any_infoframe *frame)
646 if (frame->any.type != HDMI_INFOFRAME_TYPE_VENDOR ||
647 frame->any.version != 1)
654 * hdmi_vendor_any_infoframe_check() - check a vendor infoframe
657 hdmi_vendor_any_infoframe_check(union hdmi_vendor_any_infoframe *frame)
661 ret = hdmi_vendor_any_infoframe_check_only(frame);
665 /* we only know about HDMI vendor infoframes */
666 if (frame->any.oui != HDMI_IEEE_OUI)
669 return hdmi_vendor_infoframe_check(&frame->hdmi);
673 * hdmi_vendor_any_infoframe_pack_only() - write a vendor infoframe to binary buffer
676 hdmi_vendor_any_infoframe_pack_only(const union hdmi_vendor_any_infoframe *frame,
677 void *buffer, size_t size)
681 ret = hdmi_vendor_any_infoframe_check_only(frame);
685 /* we only know about HDMI vendor infoframes */
686 if (frame->any.oui != HDMI_IEEE_OUI)
689 return hdmi_vendor_infoframe_pack_only(&frame->hdmi, buffer, size);
693 * hdmi_vendor_any_infoframe_pack() - check a vendor infoframe,
694 * and write it to binary buffer
697 hdmi_vendor_any_infoframe_pack(union hdmi_vendor_any_infoframe *frame,
698 void *buffer, size_t size)
702 ret = hdmi_vendor_any_infoframe_check(frame);
706 return hdmi_vendor_any_infoframe_pack_only(frame, buffer, size);
710 * hdmi_infoframe_check() - check a HDMI infoframe
711 * @frame: HDMI infoframe
713 * Validates that the infoframe is consistent and updates derived fields
714 * (eg. length) based on other fields.
716 * Returns 0 on success or a negative error code on failure.
719 hdmi_infoframe_check(union hdmi_infoframe *frame)
721 switch (frame->any.type) {
722 case HDMI_INFOFRAME_TYPE_AVI:
723 return hdmi_avi_infoframe_check(&frame->avi);
724 case HDMI_INFOFRAME_TYPE_SPD:
725 return hdmi_spd_infoframe_check(&frame->spd);
726 case HDMI_INFOFRAME_TYPE_AUDIO:
727 return hdmi_audio_infoframe_check(&frame->audio);
728 case HDMI_INFOFRAME_TYPE_VENDOR:
729 return hdmi_vendor_any_infoframe_check(&frame->vendor);
731 WARN(1, "Bad infoframe type %d\n", frame->any.type);
735 EXPORT_SYMBOL(hdmi_infoframe_check);
738 * hdmi_infoframe_pack_only() - write a HDMI infoframe to binary buffer
739 * @frame: HDMI infoframe
740 * @buffer: destination buffer
741 * @size: size of buffer
743 * Packs the information contained in the @frame structure into a binary
744 * representation that can be written into the corresponding controller
745 * registers. Also computes the checksum as required by section 5.3.5 of
746 * the HDMI 1.4 specification.
748 * Returns the number of bytes packed into the binary buffer or a negative
749 * error code on failure.
752 hdmi_infoframe_pack_only(const union hdmi_infoframe *frame, void *buffer, size_t size)
756 switch (frame->any.type) {
757 case HDMI_INFOFRAME_TYPE_AVI:
758 length = hdmi_avi_infoframe_pack_only(&frame->avi,
761 case HDMI_INFOFRAME_TYPE_SPD:
762 length = hdmi_spd_infoframe_pack_only(&frame->spd,
765 case HDMI_INFOFRAME_TYPE_AUDIO:
766 length = hdmi_audio_infoframe_pack_only(&frame->audio,
769 case HDMI_INFOFRAME_TYPE_VENDOR:
770 length = hdmi_vendor_any_infoframe_pack_only(&frame->vendor,
774 WARN(1, "Bad infoframe type %d\n", frame->any.type);
780 EXPORT_SYMBOL(hdmi_infoframe_pack_only);
783 * hdmi_infoframe_pack() - check a HDMI infoframe,
784 * and write it to binary buffer
785 * @frame: HDMI infoframe
786 * @buffer: destination buffer
787 * @size: size of buffer
789 * Validates that the infoframe is consistent and updates derived fields
790 * (eg. length) based on other fields, after which it packs the information
791 * contained in the @frame structure into a binary representation that
792 * can be written into the corresponding controller registers. This function
793 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
796 * Returns the number of bytes packed into the binary buffer or a negative
797 * error code on failure.
800 hdmi_infoframe_pack(union hdmi_infoframe *frame,
801 void *buffer, size_t size)
805 switch (frame->any.type) {
806 case HDMI_INFOFRAME_TYPE_AVI:
807 length = hdmi_avi_infoframe_pack(&frame->avi, buffer, size);
809 case HDMI_INFOFRAME_TYPE_SPD:
810 length = hdmi_spd_infoframe_pack(&frame->spd, buffer, size);
812 case HDMI_INFOFRAME_TYPE_AUDIO:
813 length = hdmi_audio_infoframe_pack(&frame->audio, buffer, size);
815 case HDMI_INFOFRAME_TYPE_VENDOR:
816 length = hdmi_vendor_any_infoframe_pack(&frame->vendor,
820 WARN(1, "Bad infoframe type %d\n", frame->any.type);
826 EXPORT_SYMBOL(hdmi_infoframe_pack);
828 static const char *hdmi_infoframe_type_get_name(enum hdmi_infoframe_type type)
830 if (type < 0x80 || type > 0x9f)
833 case HDMI_INFOFRAME_TYPE_VENDOR:
835 case HDMI_INFOFRAME_TYPE_AVI:
836 return "Auxiliary Video Information (AVI)";
837 case HDMI_INFOFRAME_TYPE_SPD:
838 return "Source Product Description (SPD)";
839 case HDMI_INFOFRAME_TYPE_AUDIO:
845 static void hdmi_infoframe_log_header(const char *level,
847 const struct hdmi_any_infoframe *frame)
849 hdmi_log("HDMI infoframe: %s, version %u, length %u\n",
850 hdmi_infoframe_type_get_name(frame->type),
851 frame->version, frame->length);
854 static const char *hdmi_colorspace_get_name(enum hdmi_colorspace colorspace)
856 switch (colorspace) {
857 case HDMI_COLORSPACE_RGB:
859 case HDMI_COLORSPACE_YUV422:
860 return "YCbCr 4:2:2";
861 case HDMI_COLORSPACE_YUV444:
862 return "YCbCr 4:4:4";
863 case HDMI_COLORSPACE_YUV420:
864 return "YCbCr 4:2:0";
865 case HDMI_COLORSPACE_RESERVED4:
866 return "Reserved (4)";
867 case HDMI_COLORSPACE_RESERVED5:
868 return "Reserved (5)";
869 case HDMI_COLORSPACE_RESERVED6:
870 return "Reserved (6)";
871 case HDMI_COLORSPACE_IDO_DEFINED:
872 return "IDO Defined";
877 static const char *hdmi_scan_mode_get_name(enum hdmi_scan_mode scan_mode)
880 case HDMI_SCAN_MODE_NONE:
882 case HDMI_SCAN_MODE_OVERSCAN:
884 case HDMI_SCAN_MODE_UNDERSCAN:
886 case HDMI_SCAN_MODE_RESERVED:
892 static const char *hdmi_colorimetry_get_name(enum hdmi_colorimetry colorimetry)
894 switch (colorimetry) {
895 case HDMI_COLORIMETRY_NONE:
897 case HDMI_COLORIMETRY_ITU_601:
899 case HDMI_COLORIMETRY_ITU_709:
901 case HDMI_COLORIMETRY_EXTENDED:
908 hdmi_picture_aspect_get_name(enum hdmi_picture_aspect picture_aspect)
910 switch (picture_aspect) {
911 case HDMI_PICTURE_ASPECT_NONE:
913 case HDMI_PICTURE_ASPECT_4_3:
915 case HDMI_PICTURE_ASPECT_16_9:
917 case HDMI_PICTURE_ASPECT_64_27:
919 case HDMI_PICTURE_ASPECT_256_135:
921 case HDMI_PICTURE_ASPECT_RESERVED:
928 hdmi_active_aspect_get_name(enum hdmi_active_aspect active_aspect)
930 if (active_aspect < 0 || active_aspect > 0xf)
933 switch (active_aspect) {
934 case HDMI_ACTIVE_ASPECT_16_9_TOP:
936 case HDMI_ACTIVE_ASPECT_14_9_TOP:
938 case HDMI_ACTIVE_ASPECT_16_9_CENTER:
939 return "16:9 Center";
940 case HDMI_ACTIVE_ASPECT_PICTURE:
941 return "Same as Picture";
942 case HDMI_ACTIVE_ASPECT_4_3:
944 case HDMI_ACTIVE_ASPECT_16_9:
946 case HDMI_ACTIVE_ASPECT_14_9:
948 case HDMI_ACTIVE_ASPECT_4_3_SP_14_9:
949 return "4:3 SP 14:9";
950 case HDMI_ACTIVE_ASPECT_16_9_SP_14_9:
951 return "16:9 SP 14:9";
952 case HDMI_ACTIVE_ASPECT_16_9_SP_4_3:
953 return "16:9 SP 4:3";
959 hdmi_extended_colorimetry_get_name(enum hdmi_extended_colorimetry ext_col)
962 case HDMI_EXTENDED_COLORIMETRY_XV_YCC_601:
964 case HDMI_EXTENDED_COLORIMETRY_XV_YCC_709:
966 case HDMI_EXTENDED_COLORIMETRY_S_YCC_601:
968 case HDMI_EXTENDED_COLORIMETRY_OPYCC_601:
970 case HDMI_EXTENDED_COLORIMETRY_OPRGB:
972 case HDMI_EXTENDED_COLORIMETRY_BT2020_CONST_LUM:
973 return "BT.2020 Constant Luminance";
974 case HDMI_EXTENDED_COLORIMETRY_BT2020:
976 case HDMI_EXTENDED_COLORIMETRY_RESERVED:
983 hdmi_quantization_range_get_name(enum hdmi_quantization_range qrange)
986 case HDMI_QUANTIZATION_RANGE_DEFAULT:
988 case HDMI_QUANTIZATION_RANGE_LIMITED:
990 case HDMI_QUANTIZATION_RANGE_FULL:
992 case HDMI_QUANTIZATION_RANGE_RESERVED:
998 static const char *hdmi_nups_get_name(enum hdmi_nups nups)
1001 case HDMI_NUPS_UNKNOWN:
1002 return "Unknown Non-uniform Scaling";
1003 case HDMI_NUPS_HORIZONTAL:
1004 return "Horizontally Scaled";
1005 case HDMI_NUPS_VERTICAL:
1006 return "Vertically Scaled";
1007 case HDMI_NUPS_BOTH:
1008 return "Horizontally and Vertically Scaled";
1014 hdmi_ycc_quantization_range_get_name(enum hdmi_ycc_quantization_range qrange)
1017 case HDMI_YCC_QUANTIZATION_RANGE_LIMITED:
1019 case HDMI_YCC_QUANTIZATION_RANGE_FULL:
1026 hdmi_content_type_get_name(enum hdmi_content_type content_type)
1028 switch (content_type) {
1029 case HDMI_CONTENT_TYPE_GRAPHICS:
1031 case HDMI_CONTENT_TYPE_PHOTO:
1033 case HDMI_CONTENT_TYPE_CINEMA:
1035 case HDMI_CONTENT_TYPE_GAME:
1042 * hdmi_avi_infoframe_log() - log info of HDMI AVI infoframe
1043 * @level: logging level
1045 * @frame: HDMI AVI infoframe
1047 static void hdmi_avi_infoframe_log(const char *level,
1049 const struct hdmi_avi_infoframe *frame)
1051 hdmi_infoframe_log_header(level, dev,
1052 (const struct hdmi_any_infoframe *)frame);
1054 hdmi_log(" colorspace: %s\n",
1055 hdmi_colorspace_get_name(frame->colorspace));
1056 hdmi_log(" scan mode: %s\n",
1057 hdmi_scan_mode_get_name(frame->scan_mode));
1058 hdmi_log(" colorimetry: %s\n",
1059 hdmi_colorimetry_get_name(frame->colorimetry));
1060 hdmi_log(" picture aspect: %s\n",
1061 hdmi_picture_aspect_get_name(frame->picture_aspect));
1062 hdmi_log(" active aspect: %s\n",
1063 hdmi_active_aspect_get_name(frame->active_aspect));
1064 hdmi_log(" itc: %s\n", frame->itc ? "IT Content" : "No Data");
1065 hdmi_log(" extended colorimetry: %s\n",
1066 hdmi_extended_colorimetry_get_name(frame->extended_colorimetry));
1067 hdmi_log(" quantization range: %s\n",
1068 hdmi_quantization_range_get_name(frame->quantization_range));
1069 hdmi_log(" nups: %s\n", hdmi_nups_get_name(frame->nups));
1070 hdmi_log(" video code: %u\n", frame->video_code);
1071 hdmi_log(" ycc quantization range: %s\n",
1072 hdmi_ycc_quantization_range_get_name(frame->ycc_quantization_range));
1073 hdmi_log(" hdmi content type: %s\n",
1074 hdmi_content_type_get_name(frame->content_type));
1075 hdmi_log(" pixel repeat: %u\n", frame->pixel_repeat);
1076 hdmi_log(" bar top %u, bottom %u, left %u, right %u\n",
1077 frame->top_bar, frame->bottom_bar,
1078 frame->left_bar, frame->right_bar);
1081 static const char *hdmi_spd_sdi_get_name(enum hdmi_spd_sdi sdi)
1083 if (sdi < 0 || sdi > 0xff)
1086 case HDMI_SPD_SDI_UNKNOWN:
1088 case HDMI_SPD_SDI_DSTB:
1089 return "Digital STB";
1090 case HDMI_SPD_SDI_DVDP:
1091 return "DVD Player";
1092 case HDMI_SPD_SDI_DVHS:
1094 case HDMI_SPD_SDI_HDDVR:
1095 return "HDD Videorecorder";
1096 case HDMI_SPD_SDI_DVC:
1098 case HDMI_SPD_SDI_DSC:
1100 case HDMI_SPD_SDI_VCD:
1102 case HDMI_SPD_SDI_GAME:
1104 case HDMI_SPD_SDI_PC:
1105 return "PC General";
1106 case HDMI_SPD_SDI_BD:
1107 return "Blu-Ray Disc (BD)";
1108 case HDMI_SPD_SDI_SACD:
1109 return "Super Audio CD";
1110 case HDMI_SPD_SDI_HDDVD:
1112 case HDMI_SPD_SDI_PMP:
1119 * hdmi_spd_infoframe_log() - log info of HDMI SPD infoframe
1120 * @level: logging level
1122 * @frame: HDMI SPD infoframe
1124 static void hdmi_spd_infoframe_log(const char *level,
1126 const struct hdmi_spd_infoframe *frame)
1130 hdmi_infoframe_log_header(level, dev,
1131 (const struct hdmi_any_infoframe *)frame);
1133 memset(buf, 0, sizeof(buf));
1135 strncpy(buf, frame->vendor, 8);
1136 hdmi_log(" vendor: %s\n", buf);
1137 strncpy(buf, frame->product, 16);
1138 hdmi_log(" product: %s\n", buf);
1139 hdmi_log(" source device information: %s (0x%x)\n",
1140 hdmi_spd_sdi_get_name(frame->sdi), frame->sdi);
1144 hdmi_audio_coding_type_get_name(enum hdmi_audio_coding_type coding_type)
1146 switch (coding_type) {
1147 case HDMI_AUDIO_CODING_TYPE_STREAM:
1148 return "Refer to Stream Header";
1149 case HDMI_AUDIO_CODING_TYPE_PCM:
1151 case HDMI_AUDIO_CODING_TYPE_AC3:
1153 case HDMI_AUDIO_CODING_TYPE_MPEG1:
1155 case HDMI_AUDIO_CODING_TYPE_MP3:
1157 case HDMI_AUDIO_CODING_TYPE_MPEG2:
1159 case HDMI_AUDIO_CODING_TYPE_AAC_LC:
1161 case HDMI_AUDIO_CODING_TYPE_DTS:
1163 case HDMI_AUDIO_CODING_TYPE_ATRAC:
1165 case HDMI_AUDIO_CODING_TYPE_DSD:
1166 return "One Bit Audio";
1167 case HDMI_AUDIO_CODING_TYPE_EAC3:
1168 return "Dolby Digital +";
1169 case HDMI_AUDIO_CODING_TYPE_DTS_HD:
1171 case HDMI_AUDIO_CODING_TYPE_MLP:
1173 case HDMI_AUDIO_CODING_TYPE_DST:
1175 case HDMI_AUDIO_CODING_TYPE_WMA_PRO:
1177 case HDMI_AUDIO_CODING_TYPE_CXT:
1178 return "Refer to CXT";
1184 hdmi_audio_sample_size_get_name(enum hdmi_audio_sample_size sample_size)
1186 switch (sample_size) {
1187 case HDMI_AUDIO_SAMPLE_SIZE_STREAM:
1188 return "Refer to Stream Header";
1189 case HDMI_AUDIO_SAMPLE_SIZE_16:
1191 case HDMI_AUDIO_SAMPLE_SIZE_20:
1193 case HDMI_AUDIO_SAMPLE_SIZE_24:
1200 hdmi_audio_sample_frequency_get_name(enum hdmi_audio_sample_frequency freq)
1203 case HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM:
1204 return "Refer to Stream Header";
1205 case HDMI_AUDIO_SAMPLE_FREQUENCY_32000:
1207 case HDMI_AUDIO_SAMPLE_FREQUENCY_44100:
1208 return "44.1 kHz (CD)";
1209 case HDMI_AUDIO_SAMPLE_FREQUENCY_48000:
1211 case HDMI_AUDIO_SAMPLE_FREQUENCY_88200:
1213 case HDMI_AUDIO_SAMPLE_FREQUENCY_96000:
1215 case HDMI_AUDIO_SAMPLE_FREQUENCY_176400:
1217 case HDMI_AUDIO_SAMPLE_FREQUENCY_192000:
1224 hdmi_audio_coding_type_ext_get_name(enum hdmi_audio_coding_type_ext ctx)
1226 if (ctx < 0 || ctx > 0x1f)
1230 case HDMI_AUDIO_CODING_TYPE_EXT_CT:
1231 return "Refer to CT";
1232 case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC:
1234 case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC_V2:
1236 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG_SURROUND:
1237 return "MPEG SURROUND";
1238 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC:
1239 return "MPEG-4 HE AAC";
1240 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_V2:
1241 return "MPEG-4 HE AAC v2";
1242 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC:
1243 return "MPEG-4 AAC LC";
1244 case HDMI_AUDIO_CODING_TYPE_EXT_DRA:
1246 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_SURROUND:
1247 return "MPEG-4 HE AAC + MPEG Surround";
1248 case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC_SURROUND:
1249 return "MPEG-4 AAC LC + MPEG Surround";
1255 * hdmi_audio_infoframe_log() - log info of HDMI AUDIO infoframe
1256 * @level: logging level
1258 * @frame: HDMI AUDIO infoframe
1260 static void hdmi_audio_infoframe_log(const char *level,
1262 const struct hdmi_audio_infoframe *frame)
1264 hdmi_infoframe_log_header(level, dev,
1265 (const struct hdmi_any_infoframe *)frame);
1267 if (frame->channels)
1268 hdmi_log(" channels: %u\n", frame->channels - 1);
1270 hdmi_log(" channels: Refer to stream header\n");
1271 hdmi_log(" coding type: %s\n",
1272 hdmi_audio_coding_type_get_name(frame->coding_type));
1273 hdmi_log(" sample size: %s\n",
1274 hdmi_audio_sample_size_get_name(frame->sample_size));
1275 hdmi_log(" sample frequency: %s\n",
1276 hdmi_audio_sample_frequency_get_name(frame->sample_frequency));
1277 hdmi_log(" coding type ext: %s\n",
1278 hdmi_audio_coding_type_ext_get_name(frame->coding_type_ext));
1279 hdmi_log(" channel allocation: 0x%x\n",
1280 frame->channel_allocation);
1281 hdmi_log(" level shift value: %u dB\n",
1282 frame->level_shift_value);
1283 hdmi_log(" downmix inhibit: %s\n",
1284 frame->downmix_inhibit ? "Yes" : "No");
1288 hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct)
1290 if (s3d_struct < 0 || s3d_struct > 0xf)
1293 switch (s3d_struct) {
1294 case HDMI_3D_STRUCTURE_FRAME_PACKING:
1295 return "Frame Packing";
1296 case HDMI_3D_STRUCTURE_FIELD_ALTERNATIVE:
1297 return "Field Alternative";
1298 case HDMI_3D_STRUCTURE_LINE_ALTERNATIVE:
1299 return "Line Alternative";
1300 case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_FULL:
1301 return "Side-by-side (Full)";
1302 case HDMI_3D_STRUCTURE_L_DEPTH:
1304 case HDMI_3D_STRUCTURE_L_DEPTH_GFX_GFX_DEPTH:
1305 return "L + Depth + Graphics + Graphics-depth";
1306 case HDMI_3D_STRUCTURE_TOP_AND_BOTTOM:
1307 return "Top-and-Bottom";
1308 case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF:
1309 return "Side-by-side (Half)";
1317 * hdmi_vendor_infoframe_log() - log info of HDMI VENDOR infoframe
1318 * @level: logging level
1320 * @frame: HDMI VENDOR infoframe
1323 hdmi_vendor_any_infoframe_log(const char *level,
1325 const union hdmi_vendor_any_infoframe *frame)
1327 const struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
1329 hdmi_infoframe_log_header(level, dev,
1330 (const struct hdmi_any_infoframe *)frame);
1332 if (frame->any.oui != HDMI_IEEE_OUI) {
1333 hdmi_log(" not a HDMI vendor infoframe\n");
1336 if (hvf->vic == 0 && hvf->s3d_struct == HDMI_3D_STRUCTURE_INVALID) {
1337 hdmi_log(" empty frame\n");
1342 hdmi_log(" HDMI VIC: %u\n", hvf->vic);
1343 if (hvf->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
1344 hdmi_log(" 3D structure: %s\n",
1345 hdmi_3d_structure_get_name(hvf->s3d_struct));
1346 if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
1347 hdmi_log(" 3D extension data: %d\n",
1353 * hdmi_infoframe_log() - log info of HDMI infoframe
1354 * @level: logging level
1356 * @frame: HDMI infoframe
1358 void hdmi_infoframe_log(const char *level,
1360 const union hdmi_infoframe *frame)
1362 switch (frame->any.type) {
1363 case HDMI_INFOFRAME_TYPE_AVI:
1364 hdmi_avi_infoframe_log(level, dev, &frame->avi);
1366 case HDMI_INFOFRAME_TYPE_SPD:
1367 hdmi_spd_infoframe_log(level, dev, &frame->spd);
1369 case HDMI_INFOFRAME_TYPE_AUDIO:
1370 hdmi_audio_infoframe_log(level, dev, &frame->audio);
1372 case HDMI_INFOFRAME_TYPE_VENDOR:
1373 hdmi_vendor_any_infoframe_log(level, dev, &frame->vendor);
1377 EXPORT_SYMBOL(hdmi_infoframe_log);
1380 * hdmi_avi_infoframe_unpack() - unpack binary buffer to a HDMI AVI infoframe
1381 * @frame: HDMI AVI infoframe
1382 * @buffer: source buffer
1383 * @size: size of buffer
1385 * Unpacks the information contained in binary @buffer into a structured
1386 * @frame of the HDMI Auxiliary Video (AVI) information frame.
1387 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1390 * Returns 0 on success or a negative error code on failure.
1392 static int hdmi_avi_infoframe_unpack(struct hdmi_avi_infoframe *frame,
1393 const void *buffer, size_t size)
1395 const u8 *ptr = buffer;
1398 if (size < HDMI_INFOFRAME_SIZE(AVI))
1401 if (ptr[0] != HDMI_INFOFRAME_TYPE_AVI ||
1403 ptr[2] != HDMI_AVI_INFOFRAME_SIZE)
1406 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AVI)) != 0)
1409 ret = hdmi_avi_infoframe_init(frame);
1413 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1415 frame->colorspace = (ptr[0] >> 5) & 0x3;
1417 frame->active_aspect = ptr[1] & 0xf;
1419 frame->top_bar = (ptr[5] << 8) + ptr[6];
1420 frame->bottom_bar = (ptr[7] << 8) + ptr[8];
1423 frame->left_bar = (ptr[9] << 8) + ptr[10];
1424 frame->right_bar = (ptr[11] << 8) + ptr[12];
1426 frame->scan_mode = ptr[0] & 0x3;
1428 frame->colorimetry = (ptr[1] >> 6) & 0x3;
1429 frame->picture_aspect = (ptr[1] >> 4) & 0x3;
1430 frame->active_aspect = ptr[1] & 0xf;
1432 frame->itc = ptr[2] & 0x80 ? true : false;
1433 frame->extended_colorimetry = (ptr[2] >> 4) & 0x7;
1434 frame->quantization_range = (ptr[2] >> 2) & 0x3;
1435 frame->nups = ptr[2] & 0x3;
1437 frame->video_code = ptr[3] & 0x7f;
1438 frame->ycc_quantization_range = (ptr[4] >> 6) & 0x3;
1439 frame->content_type = (ptr[4] >> 4) & 0x3;
1441 frame->pixel_repeat = ptr[4] & 0xf;
1447 * hdmi_spd_infoframe_unpack() - unpack binary buffer to a HDMI SPD infoframe
1448 * @frame: HDMI SPD infoframe
1449 * @buffer: source buffer
1450 * @size: size of buffer
1452 * Unpacks the information contained in binary @buffer into a structured
1453 * @frame of the HDMI Source Product Description (SPD) information frame.
1454 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1457 * Returns 0 on success or a negative error code on failure.
1459 static int hdmi_spd_infoframe_unpack(struct hdmi_spd_infoframe *frame,
1460 const void *buffer, size_t size)
1462 const u8 *ptr = buffer;
1465 if (size < HDMI_INFOFRAME_SIZE(SPD))
1468 if (ptr[0] != HDMI_INFOFRAME_TYPE_SPD ||
1470 ptr[2] != HDMI_SPD_INFOFRAME_SIZE) {
1474 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(SPD)) != 0)
1477 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1479 ret = hdmi_spd_infoframe_init(frame, ptr, ptr + 8);
1483 frame->sdi = ptr[24];
1489 * hdmi_audio_infoframe_unpack() - unpack binary buffer to a HDMI AUDIO infoframe
1490 * @frame: HDMI Audio infoframe
1491 * @buffer: source buffer
1492 * @size: size of buffer
1494 * Unpacks the information contained in binary @buffer into a structured
1495 * @frame of the HDMI Audio information frame.
1496 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1499 * Returns 0 on success or a negative error code on failure.
1501 static int hdmi_audio_infoframe_unpack(struct hdmi_audio_infoframe *frame,
1502 const void *buffer, size_t size)
1504 const u8 *ptr = buffer;
1507 if (size < HDMI_INFOFRAME_SIZE(AUDIO))
1510 if (ptr[0] != HDMI_INFOFRAME_TYPE_AUDIO ||
1512 ptr[2] != HDMI_AUDIO_INFOFRAME_SIZE) {
1516 if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AUDIO)) != 0)
1519 ret = hdmi_audio_infoframe_init(frame);
1523 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1525 frame->channels = ptr[0] & 0x7;
1526 frame->coding_type = (ptr[0] >> 4) & 0xf;
1527 frame->sample_size = ptr[1] & 0x3;
1528 frame->sample_frequency = (ptr[1] >> 2) & 0x7;
1529 frame->coding_type_ext = ptr[2] & 0x1f;
1530 frame->channel_allocation = ptr[3];
1531 frame->level_shift_value = (ptr[4] >> 3) & 0xf;
1532 frame->downmix_inhibit = ptr[4] & 0x80 ? true : false;
1538 * hdmi_vendor_infoframe_unpack() - unpack binary buffer to a HDMI vendor infoframe
1539 * @frame: HDMI Vendor infoframe
1540 * @buffer: source buffer
1541 * @size: size of buffer
1543 * Unpacks the information contained in binary @buffer into a structured
1544 * @frame of the HDMI Vendor information frame.
1545 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1548 * Returns 0 on success or a negative error code on failure.
1551 hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame,
1552 const void *buffer, size_t size)
1554 const u8 *ptr = buffer;
1557 u8 hdmi_video_format;
1558 struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
1560 if (size < HDMI_INFOFRAME_HEADER_SIZE)
1563 if (ptr[0] != HDMI_INFOFRAME_TYPE_VENDOR ||
1565 (ptr[2] != 4 && ptr[2] != 5 && ptr[2] != 6))
1570 if (size < HDMI_INFOFRAME_HEADER_SIZE + length)
1573 if (hdmi_infoframe_checksum(buffer,
1574 HDMI_INFOFRAME_HEADER_SIZE + length) != 0)
1577 ptr += HDMI_INFOFRAME_HEADER_SIZE;
1580 if ((ptr[0] != 0x03) ||
1585 hdmi_video_format = ptr[3] >> 5;
1587 if (hdmi_video_format > 0x2)
1590 ret = hdmi_vendor_infoframe_init(hvf);
1594 hvf->length = length;
1596 if (hdmi_video_format == 0x2) {
1597 if (length != 5 && length != 6)
1599 hvf->s3d_struct = ptr[4] >> 4;
1600 if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF) {
1603 hvf->s3d_ext_data = ptr[5] >> 4;
1605 } else if (hdmi_video_format == 0x1) {
1618 * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe
1619 * @frame: HDMI infoframe
1620 * @buffer: source buffer
1621 * @size: size of buffer
1623 * Unpacks the information contained in binary buffer @buffer into a structured
1624 * @frame of a HDMI infoframe.
1625 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
1628 * Returns 0 on success or a negative error code on failure.
1630 int hdmi_infoframe_unpack(union hdmi_infoframe *frame,
1631 const void *buffer, size_t size)
1634 const u8 *ptr = buffer;
1636 if (size < HDMI_INFOFRAME_HEADER_SIZE)
1640 case HDMI_INFOFRAME_TYPE_AVI:
1641 ret = hdmi_avi_infoframe_unpack(&frame->avi, buffer, size);
1643 case HDMI_INFOFRAME_TYPE_SPD:
1644 ret = hdmi_spd_infoframe_unpack(&frame->spd, buffer, size);
1646 case HDMI_INFOFRAME_TYPE_AUDIO:
1647 ret = hdmi_audio_infoframe_unpack(&frame->audio, buffer, size);
1649 case HDMI_INFOFRAME_TYPE_VENDOR:
1650 ret = hdmi_vendor_any_infoframe_unpack(&frame->vendor, buffer, size);
1659 EXPORT_SYMBOL(hdmi_infoframe_unpack);