12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265126612671268126912701271127212731274127512761277127812791280128112821283128412851286128712881289129012911292129312941295129612971298129913001301130213031304130513061307130813091310131113121313131413151316131713181319132013211322132313241325132613271328132913301331133213331334133513361337133813391340134113421343134413451346134713481349135013511352135313541355135613571358135913601361136213631364136513661367136813691370137113721373137413751376137713781379138013811382138313841385138613871388138913901391139213931394139513961397139813991400140114021403140414051406140714081409141014111412141314141415141614171418141914201421142214231424142514261427142814291430143114321433143414351436143714381439144014411442144314441445144614471448144914501451145214531454145514561457145814591460146114621463146414651466146714681469147014711472147314741475147614771478147914801481148214831484148514861487148814891490149114921493149414951496149714981499150015011502150315041505150615071508150915101511151215131514151515161517151815191520152115221523152415251526152715281529153015311532153315341535153615371538153915401541154215431544154515461547154815491550155115521553155415551556155715581559156015611562156315641565156615671568156915701571157215731574157515761577157815791580158115821583158415851586158715881589159015911592159315941595159615971598159916001601160216031604160516061607160816091610161116121613161416151616161716181619162016211622162316241625162616271628162916301631163216331634163516361637163816391640164116421643164416451646164716481649165016511652165316541655165616571658165916601661166216631664166516661667166816691670167116721673167416751676167716781679168016811682168316841685168616871688168916901691169216931694169516961697169816991700170117021703170417051706170717081709171017111712171317141715171617171718171917201721172217231724172517261727172817291730173117321733173417351736173717381739174017411742174317441745174617471748174917501751175217531754175517561757175817591760176117621763176417651766176717681769177017711772177317741775177617771778177917801781178217831784178517861787178817891790179117921793179417951796179717981799180018011802180318041805180618071808180918101811181218131814181518161817181818191820182118221823182418251826182718281829183018311832183318341835183618371838183918401841184218431844184518461847184818491850185118521853185418551856185718581859186018611862186318641865186618671868186918701871187218731874187518761877187818791880188118821883188418851886188718881889189018911892189318941895189618971898189919001901190219031904190519061907190819091910191119121913191419151916191719181919192019211922192319241925192619271928192919301931193219331934193519361937193819391940194119421943194419451946194719481949195019511952195319541955 |
- /*
- * Copyright (C) 2012 Avionic Design GmbH
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sub license,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- */
- #include <drm/display/drm_dp.h>
- #include <linux/bitops.h>
- #include <linux/bug.h>
- #include <linux/errno.h>
- #include <linux/export.h>
- #include <linux/hdmi.h>
- #include <linux/string.h>
- #include <linux/device.h>
- #define hdmi_log(fmt, ...) dev_printk(level, dev, fmt, ##__VA_ARGS__)
- static u8 hdmi_infoframe_checksum(const u8 *ptr, size_t size)
- {
- u8 csum = 0;
- size_t i;
- /* compute checksum */
- for (i = 0; i < size; i++)
- csum += ptr[i];
- return 256 - csum;
- }
- static void hdmi_infoframe_set_checksum(void *buffer, size_t size)
- {
- u8 *ptr = buffer;
- ptr[3] = hdmi_infoframe_checksum(buffer, size);
- }
- /**
- * hdmi_avi_infoframe_init() - initialize an HDMI AVI infoframe
- * @frame: HDMI AVI infoframe
- */
- void hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame)
- {
- memset(frame, 0, sizeof(*frame));
- frame->type = HDMI_INFOFRAME_TYPE_AVI;
- frame->version = 2;
- frame->length = HDMI_AVI_INFOFRAME_SIZE;
- }
- EXPORT_SYMBOL(hdmi_avi_infoframe_init);
- static int hdmi_avi_infoframe_check_only(const struct hdmi_avi_infoframe *frame)
- {
- if (frame->type != HDMI_INFOFRAME_TYPE_AVI ||
- frame->version != 2 ||
- frame->length != HDMI_AVI_INFOFRAME_SIZE)
- return -EINVAL;
- if (frame->picture_aspect > HDMI_PICTURE_ASPECT_16_9)
- return -EINVAL;
- return 0;
- }
- /**
- * hdmi_avi_infoframe_check() - check a HDMI AVI infoframe
- * @frame: HDMI AVI infoframe
- *
- * Validates that the infoframe is consistent and updates derived fields
- * (eg. length) based on other fields.
- *
- * Returns 0 on success or a negative error code on failure.
- */
- int hdmi_avi_infoframe_check(struct hdmi_avi_infoframe *frame)
- {
- return hdmi_avi_infoframe_check_only(frame);
- }
- EXPORT_SYMBOL(hdmi_avi_infoframe_check);
- /**
- * hdmi_avi_infoframe_pack_only() - write HDMI AVI infoframe to binary buffer
- * @frame: HDMI AVI infoframe
- * @buffer: destination buffer
- * @size: size of buffer
- *
- * Packs the information contained in the @frame structure into a binary
- * representation that can be written into the corresponding controller
- * registers. Also computes the checksum as required by section 5.3.5 of
- * the HDMI 1.4 specification.
- *
- * Returns the number of bytes packed into the binary buffer or a negative
- * error code on failure.
- */
- ssize_t hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe *frame,
- void *buffer, size_t size)
- {
- u8 *ptr = buffer;
- size_t length;
- int ret;
- ret = hdmi_avi_infoframe_check_only(frame);
- if (ret)
- return ret;
- length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
- if (size < length)
- return -ENOSPC;
- memset(buffer, 0, size);
- ptr[0] = frame->type;
- ptr[1] = frame->version;
- ptr[2] = frame->length;
- ptr[3] = 0; /* checksum */
- /* start infoframe payload */
- ptr += HDMI_INFOFRAME_HEADER_SIZE;
- ptr[0] = ((frame->colorspace & 0x3) << 5) | (frame->scan_mode & 0x3);
- /*
- * Data byte 1, bit 4 has to be set if we provide the active format
- * aspect ratio
- */
- if (frame->active_aspect & 0xf)
- ptr[0] |= BIT(4);
- /* Bit 3 and 2 indicate if we transmit horizontal/vertical bar data */
- if (frame->top_bar || frame->bottom_bar)
- ptr[0] |= BIT(3);
- if (frame->left_bar || frame->right_bar)
- ptr[0] |= BIT(2);
- ptr[1] = ((frame->colorimetry & 0x3) << 6) |
- ((frame->picture_aspect & 0x3) << 4) |
- (frame->active_aspect & 0xf);
- ptr[2] = ((frame->extended_colorimetry & 0x7) << 4) |
- ((frame->quantization_range & 0x3) << 2) |
- (frame->nups & 0x3);
- if (frame->itc)
- ptr[2] |= BIT(7);
- ptr[3] = frame->video_code & 0x7f;
- ptr[4] = ((frame->ycc_quantization_range & 0x3) << 6) |
- ((frame->content_type & 0x3) << 4) |
- (frame->pixel_repeat & 0xf);
- ptr[5] = frame->top_bar & 0xff;
- ptr[6] = (frame->top_bar >> 8) & 0xff;
- ptr[7] = frame->bottom_bar & 0xff;
- ptr[8] = (frame->bottom_bar >> 8) & 0xff;
- ptr[9] = frame->left_bar & 0xff;
- ptr[10] = (frame->left_bar >> 8) & 0xff;
- ptr[11] = frame->right_bar & 0xff;
- ptr[12] = (frame->right_bar >> 8) & 0xff;
- hdmi_infoframe_set_checksum(buffer, length);
- return length;
- }
- EXPORT_SYMBOL(hdmi_avi_infoframe_pack_only);
- /**
- * hdmi_avi_infoframe_pack() - check a HDMI AVI infoframe,
- * and write it to binary buffer
- * @frame: HDMI AVI infoframe
- * @buffer: destination buffer
- * @size: size of buffer
- *
- * Validates that the infoframe is consistent and updates derived fields
- * (eg. length) based on other fields, after which it packs the information
- * contained in the @frame structure into a binary representation that
- * can be written into the corresponding controller registers. This function
- * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
- * specification.
- *
- * Returns the number of bytes packed into the binary buffer or a negative
- * error code on failure.
- */
- ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame,
- void *buffer, size_t size)
- {
- int ret;
- ret = hdmi_avi_infoframe_check(frame);
- if (ret)
- return ret;
- return hdmi_avi_infoframe_pack_only(frame, buffer, size);
- }
- EXPORT_SYMBOL(hdmi_avi_infoframe_pack);
- /**
- * hdmi_spd_infoframe_init() - initialize an HDMI SPD infoframe
- * @frame: HDMI SPD infoframe
- * @vendor: vendor string
- * @product: product string
- *
- * Returns 0 on success or a negative error code on failure.
- */
- int hdmi_spd_infoframe_init(struct hdmi_spd_infoframe *frame,
- const char *vendor, const char *product)
- {
- size_t len;
- memset(frame, 0, sizeof(*frame));
- frame->type = HDMI_INFOFRAME_TYPE_SPD;
- frame->version = 1;
- frame->length = HDMI_SPD_INFOFRAME_SIZE;
- len = strlen(vendor);
- memcpy(frame->vendor, vendor, min(len, sizeof(frame->vendor)));
- len = strlen(product);
- memcpy(frame->product, product, min(len, sizeof(frame->product)));
- return 0;
- }
- EXPORT_SYMBOL(hdmi_spd_infoframe_init);
- static int hdmi_spd_infoframe_check_only(const struct hdmi_spd_infoframe *frame)
- {
- if (frame->type != HDMI_INFOFRAME_TYPE_SPD ||
- frame->version != 1 ||
- frame->length != HDMI_SPD_INFOFRAME_SIZE)
- return -EINVAL;
- return 0;
- }
- /**
- * hdmi_spd_infoframe_check() - check a HDMI SPD infoframe
- * @frame: HDMI SPD infoframe
- *
- * Validates that the infoframe is consistent and updates derived fields
- * (eg. length) based on other fields.
- *
- * Returns 0 on success or a negative error code on failure.
- */
- int hdmi_spd_infoframe_check(struct hdmi_spd_infoframe *frame)
- {
- return hdmi_spd_infoframe_check_only(frame);
- }
- EXPORT_SYMBOL(hdmi_spd_infoframe_check);
- /**
- * hdmi_spd_infoframe_pack_only() - write HDMI SPD infoframe to binary buffer
- * @frame: HDMI SPD infoframe
- * @buffer: destination buffer
- * @size: size of buffer
- *
- * Packs the information contained in the @frame structure into a binary
- * representation that can be written into the corresponding controller
- * registers. Also computes the checksum as required by section 5.3.5 of
- * the HDMI 1.4 specification.
- *
- * Returns the number of bytes packed into the binary buffer or a negative
- * error code on failure.
- */
- ssize_t hdmi_spd_infoframe_pack_only(const struct hdmi_spd_infoframe *frame,
- void *buffer, size_t size)
- {
- u8 *ptr = buffer;
- size_t length;
- int ret;
- ret = hdmi_spd_infoframe_check_only(frame);
- if (ret)
- return ret;
- length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
- if (size < length)
- return -ENOSPC;
- memset(buffer, 0, size);
- ptr[0] = frame->type;
- ptr[1] = frame->version;
- ptr[2] = frame->length;
- ptr[3] = 0; /* checksum */
- /* start infoframe payload */
- ptr += HDMI_INFOFRAME_HEADER_SIZE;
- memcpy(ptr, frame->vendor, sizeof(frame->vendor));
- memcpy(ptr + 8, frame->product, sizeof(frame->product));
- ptr[24] = frame->sdi;
- hdmi_infoframe_set_checksum(buffer, length);
- return length;
- }
- EXPORT_SYMBOL(hdmi_spd_infoframe_pack_only);
- /**
- * hdmi_spd_infoframe_pack() - check a HDMI SPD infoframe,
- * and write it to binary buffer
- * @frame: HDMI SPD infoframe
- * @buffer: destination buffer
- * @size: size of buffer
- *
- * Validates that the infoframe is consistent and updates derived fields
- * (eg. length) based on other fields, after which it packs the information
- * contained in the @frame structure into a binary representation that
- * can be written into the corresponding controller registers. This function
- * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
- * specification.
- *
- * Returns the number of bytes packed into the binary buffer or a negative
- * error code on failure.
- */
- ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame,
- void *buffer, size_t size)
- {
- int ret;
- ret = hdmi_spd_infoframe_check(frame);
- if (ret)
- return ret;
- return hdmi_spd_infoframe_pack_only(frame, buffer, size);
- }
- EXPORT_SYMBOL(hdmi_spd_infoframe_pack);
- /**
- * hdmi_audio_infoframe_init() - initialize an HDMI audio infoframe
- * @frame: HDMI audio infoframe
- *
- * Returns 0 on success or a negative error code on failure.
- */
- int hdmi_audio_infoframe_init(struct hdmi_audio_infoframe *frame)
- {
- memset(frame, 0, sizeof(*frame));
- frame->type = HDMI_INFOFRAME_TYPE_AUDIO;
- frame->version = 1;
- frame->length = HDMI_AUDIO_INFOFRAME_SIZE;
- return 0;
- }
- EXPORT_SYMBOL(hdmi_audio_infoframe_init);
- static int hdmi_audio_infoframe_check_only(const struct hdmi_audio_infoframe *frame)
- {
- if (frame->type != HDMI_INFOFRAME_TYPE_AUDIO ||
- frame->version != 1 ||
- frame->length != HDMI_AUDIO_INFOFRAME_SIZE)
- return -EINVAL;
- return 0;
- }
- /**
- * hdmi_audio_infoframe_check() - check a HDMI audio infoframe
- * @frame: HDMI audio infoframe
- *
- * Validates that the infoframe is consistent and updates derived fields
- * (eg. length) based on other fields.
- *
- * Returns 0 on success or a negative error code on failure.
- */
- int hdmi_audio_infoframe_check(const struct hdmi_audio_infoframe *frame)
- {
- return hdmi_audio_infoframe_check_only(frame);
- }
- EXPORT_SYMBOL(hdmi_audio_infoframe_check);
- static void
- hdmi_audio_infoframe_pack_payload(const struct hdmi_audio_infoframe *frame,
- u8 *buffer)
- {
- u8 channels;
- if (frame->channels >= 2)
- channels = frame->channels - 1;
- else
- channels = 0;
- buffer[0] = ((frame->coding_type & 0xf) << 4) | (channels & 0x7);
- buffer[1] = ((frame->sample_frequency & 0x7) << 2) |
- (frame->sample_size & 0x3);
- buffer[2] = frame->coding_type_ext & 0x1f;
- buffer[3] = frame->channel_allocation;
- buffer[4] = (frame->level_shift_value & 0xf) << 3;
- if (frame->downmix_inhibit)
- buffer[4] |= BIT(7);
- }
- /**
- * hdmi_audio_infoframe_pack_only() - write HDMI audio infoframe to binary buffer
- * @frame: HDMI audio infoframe
- * @buffer: destination buffer
- * @size: size of buffer
- *
- * Packs the information contained in the @frame structure into a binary
- * representation that can be written into the corresponding controller
- * registers. Also computes the checksum as required by section 5.3.5 of
- * the HDMI 1.4 specification.
- *
- * Returns the number of bytes packed into the binary buffer or a negative
- * error code on failure.
- */
- ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame,
- void *buffer, size_t size)
- {
- u8 *ptr = buffer;
- size_t length;
- int ret;
- ret = hdmi_audio_infoframe_check_only(frame);
- if (ret)
- return ret;
- length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
- if (size < length)
- return -ENOSPC;
- memset(buffer, 0, size);
- ptr[0] = frame->type;
- ptr[1] = frame->version;
- ptr[2] = frame->length;
- ptr[3] = 0; /* checksum */
- hdmi_audio_infoframe_pack_payload(frame,
- ptr + HDMI_INFOFRAME_HEADER_SIZE);
- hdmi_infoframe_set_checksum(buffer, length);
- return length;
- }
- EXPORT_SYMBOL(hdmi_audio_infoframe_pack_only);
- /**
- * hdmi_audio_infoframe_pack() - check a HDMI Audio infoframe,
- * and write it to binary buffer
- * @frame: HDMI Audio infoframe
- * @buffer: destination buffer
- * @size: size of buffer
- *
- * Validates that the infoframe is consistent and updates derived fields
- * (eg. length) based on other fields, after which it packs the information
- * contained in the @frame structure into a binary representation that
- * can be written into the corresponding controller registers. This function
- * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
- * specification.
- *
- * Returns the number of bytes packed into the binary buffer or a negative
- * error code on failure.
- */
- ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame,
- void *buffer, size_t size)
- {
- int ret;
- ret = hdmi_audio_infoframe_check(frame);
- if (ret)
- return ret;
- return hdmi_audio_infoframe_pack_only(frame, buffer, size);
- }
- EXPORT_SYMBOL(hdmi_audio_infoframe_pack);
- /**
- * hdmi_audio_infoframe_pack_for_dp - Pack a HDMI Audio infoframe for DisplayPort
- *
- * @frame: HDMI Audio infoframe
- * @sdp: Secondary data packet for DisplayPort.
- * @dp_version: DisplayPort version to be encoded in the header
- *
- * Packs a HDMI Audio Infoframe to be sent over DisplayPort. This function
- * fills the secondary data packet to be used for DisplayPort.
- *
- * Return: Number of total written bytes or a negative errno on failure.
- */
- ssize_t
- hdmi_audio_infoframe_pack_for_dp(const struct hdmi_audio_infoframe *frame,
- struct dp_sdp *sdp, u8 dp_version)
- {
- int ret;
- ret = hdmi_audio_infoframe_check(frame);
- if (ret)
- return ret;
- memset(sdp->db, 0, sizeof(sdp->db));
- /* Secondary-data packet header */
- sdp->sdp_header.HB0 = 0;
- sdp->sdp_header.HB1 = frame->type;
- sdp->sdp_header.HB2 = DP_SDP_AUDIO_INFOFRAME_HB2;
- sdp->sdp_header.HB3 = (dp_version & 0x3f) << 2;
- hdmi_audio_infoframe_pack_payload(frame, sdp->db);
- /* Return size = frame length + four HB for sdp_header */
- return frame->length + 4;
- }
- EXPORT_SYMBOL(hdmi_audio_infoframe_pack_for_dp);
- /**
- * hdmi_vendor_infoframe_init() - initialize an HDMI vendor infoframe
- * @frame: HDMI vendor infoframe
- *
- * Returns 0 on success or a negative error code on failure.
- */
- int hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe *frame)
- {
- memset(frame, 0, sizeof(*frame));
- frame->type = HDMI_INFOFRAME_TYPE_VENDOR;
- frame->version = 1;
- frame->oui = HDMI_IEEE_OUI;
- /*
- * 0 is a valid value for s3d_struct, so we use a special "not set"
- * value
- */
- frame->s3d_struct = HDMI_3D_STRUCTURE_INVALID;
- frame->length = HDMI_VENDOR_INFOFRAME_SIZE;
- return 0;
- }
- EXPORT_SYMBOL(hdmi_vendor_infoframe_init);
- static int hdmi_vendor_infoframe_length(const struct hdmi_vendor_infoframe *frame)
- {
- /* for side by side (half) we also need to provide 3D_Ext_Data */
- if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
- return 6;
- else if (frame->vic != 0 || frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
- return 5;
- else
- return 4;
- }
- static int hdmi_vendor_infoframe_check_only(const struct hdmi_vendor_infoframe *frame)
- {
- if (frame->type != HDMI_INFOFRAME_TYPE_VENDOR ||
- frame->version != 1 ||
- frame->oui != HDMI_IEEE_OUI)
- return -EINVAL;
- /* only one of those can be supplied */
- if (frame->vic != 0 && frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
- return -EINVAL;
- if (frame->length != hdmi_vendor_infoframe_length(frame))
- return -EINVAL;
- return 0;
- }
- /**
- * hdmi_vendor_infoframe_check() - check a HDMI vendor infoframe
- * @frame: HDMI infoframe
- *
- * Validates that the infoframe is consistent and updates derived fields
- * (eg. length) based on other fields.
- *
- * Returns 0 on success or a negative error code on failure.
- */
- int hdmi_vendor_infoframe_check(struct hdmi_vendor_infoframe *frame)
- {
- frame->length = hdmi_vendor_infoframe_length(frame);
- return hdmi_vendor_infoframe_check_only(frame);
- }
- EXPORT_SYMBOL(hdmi_vendor_infoframe_check);
- /**
- * hdmi_vendor_infoframe_pack_only() - write a HDMI vendor infoframe to binary buffer
- * @frame: HDMI infoframe
- * @buffer: destination buffer
- * @size: size of buffer
- *
- * Packs the information contained in the @frame structure into a binary
- * representation that can be written into the corresponding controller
- * registers. Also computes the checksum as required by section 5.3.5 of
- * the HDMI 1.4 specification.
- *
- * Returns the number of bytes packed into the binary buffer or a negative
- * error code on failure.
- */
- ssize_t hdmi_vendor_infoframe_pack_only(const struct hdmi_vendor_infoframe *frame,
- void *buffer, size_t size)
- {
- u8 *ptr = buffer;
- size_t length;
- int ret;
- ret = hdmi_vendor_infoframe_check_only(frame);
- if (ret)
- return ret;
- length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
- if (size < length)
- return -ENOSPC;
- memset(buffer, 0, size);
- ptr[0] = frame->type;
- ptr[1] = frame->version;
- ptr[2] = frame->length;
- ptr[3] = 0; /* checksum */
- /* HDMI OUI */
- ptr[4] = 0x03;
- ptr[5] = 0x0c;
- ptr[6] = 0x00;
- if (frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
- ptr[7] = 0x2 << 5; /* video format */
- ptr[8] = (frame->s3d_struct & 0xf) << 4;
- if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
- ptr[9] = (frame->s3d_ext_data & 0xf) << 4;
- } else if (frame->vic) {
- ptr[7] = 0x1 << 5; /* video format */
- ptr[8] = frame->vic;
- } else {
- ptr[7] = 0x0 << 5; /* video format */
- }
- hdmi_infoframe_set_checksum(buffer, length);
- return length;
- }
- EXPORT_SYMBOL(hdmi_vendor_infoframe_pack_only);
- /**
- * hdmi_vendor_infoframe_pack() - check a HDMI Vendor infoframe,
- * and write it to binary buffer
- * @frame: HDMI Vendor infoframe
- * @buffer: destination buffer
- * @size: size of buffer
- *
- * Validates that the infoframe is consistent and updates derived fields
- * (eg. length) based on other fields, after which it packs the information
- * contained in the @frame structure into a binary representation that
- * can be written into the corresponding controller registers. This function
- * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
- * specification.
- *
- * Returns the number of bytes packed into the binary buffer or a negative
- * error code on failure.
- */
- ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
- void *buffer, size_t size)
- {
- int ret;
- ret = hdmi_vendor_infoframe_check(frame);
- if (ret)
- return ret;
- return hdmi_vendor_infoframe_pack_only(frame, buffer, size);
- }
- EXPORT_SYMBOL(hdmi_vendor_infoframe_pack);
- static int
- hdmi_vendor_any_infoframe_check_only(const union hdmi_vendor_any_infoframe *frame)
- {
- if (frame->any.type != HDMI_INFOFRAME_TYPE_VENDOR ||
- frame->any.version != 1)
- return -EINVAL;
- return 0;
- }
- /**
- * hdmi_drm_infoframe_init() - initialize an HDMI Dynaminc Range and
- * mastering infoframe
- * @frame: HDMI DRM infoframe
- *
- * Returns 0 on success or a negative error code on failure.
- */
- int hdmi_drm_infoframe_init(struct hdmi_drm_infoframe *frame)
- {
- memset(frame, 0, sizeof(*frame));
- frame->type = HDMI_INFOFRAME_TYPE_DRM;
- frame->version = 1;
- frame->length = HDMI_DRM_INFOFRAME_SIZE;
- return 0;
- }
- EXPORT_SYMBOL(hdmi_drm_infoframe_init);
- static int hdmi_drm_infoframe_check_only(const struct hdmi_drm_infoframe *frame)
- {
- if (frame->type != HDMI_INFOFRAME_TYPE_DRM ||
- frame->version != 1)
- return -EINVAL;
- if (frame->length != HDMI_DRM_INFOFRAME_SIZE)
- return -EINVAL;
- return 0;
- }
- /**
- * hdmi_drm_infoframe_check() - check a HDMI DRM infoframe
- * @frame: HDMI DRM infoframe
- *
- * Validates that the infoframe is consistent.
- * Returns 0 on success or a negative error code on failure.
- */
- int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame)
- {
- return hdmi_drm_infoframe_check_only(frame);
- }
- EXPORT_SYMBOL(hdmi_drm_infoframe_check);
- /**
- * hdmi_drm_infoframe_pack_only() - write HDMI DRM infoframe to binary buffer
- * @frame: HDMI DRM infoframe
- * @buffer: destination buffer
- * @size: size of buffer
- *
- * Packs the information contained in the @frame structure into a binary
- * representation that can be written into the corresponding controller
- * registers. Also computes the checksum as required by section 5.3.5 of
- * the HDMI 1.4 specification.
- *
- * Returns the number of bytes packed into the binary buffer or a negative
- * error code on failure.
- */
- ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
- void *buffer, size_t size)
- {
- u8 *ptr = buffer;
- size_t length;
- int i;
- length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
- if (size < length)
- return -ENOSPC;
- memset(buffer, 0, size);
- ptr[0] = frame->type;
- ptr[1] = frame->version;
- ptr[2] = frame->length;
- ptr[3] = 0; /* checksum */
- /* start infoframe payload */
- ptr += HDMI_INFOFRAME_HEADER_SIZE;
- *ptr++ = frame->eotf;
- *ptr++ = frame->metadata_type;
- for (i = 0; i < 3; i++) {
- *ptr++ = frame->display_primaries[i].x;
- *ptr++ = frame->display_primaries[i].x >> 8;
- *ptr++ = frame->display_primaries[i].y;
- *ptr++ = frame->display_primaries[i].y >> 8;
- }
- *ptr++ = frame->white_point.x;
- *ptr++ = frame->white_point.x >> 8;
- *ptr++ = frame->white_point.y;
- *ptr++ = frame->white_point.y >> 8;
- *ptr++ = frame->max_display_mastering_luminance;
- *ptr++ = frame->max_display_mastering_luminance >> 8;
- *ptr++ = frame->min_display_mastering_luminance;
- *ptr++ = frame->min_display_mastering_luminance >> 8;
- *ptr++ = frame->max_cll;
- *ptr++ = frame->max_cll >> 8;
- *ptr++ = frame->max_fall;
- *ptr++ = frame->max_fall >> 8;
- hdmi_infoframe_set_checksum(buffer, length);
- return length;
- }
- EXPORT_SYMBOL(hdmi_drm_infoframe_pack_only);
- /**
- * hdmi_drm_infoframe_pack() - check a HDMI DRM infoframe,
- * and write it to binary buffer
- * @frame: HDMI DRM infoframe
- * @buffer: destination buffer
- * @size: size of buffer
- *
- * Validates that the infoframe is consistent and updates derived fields
- * (eg. length) based on other fields, after which it packs the information
- * contained in the @frame structure into a binary representation that
- * can be written into the corresponding controller registers. This function
- * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
- * specification.
- *
- * Returns the number of bytes packed into the binary buffer or a negative
- * error code on failure.
- */
- ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame,
- void *buffer, size_t size)
- {
- int ret;
- ret = hdmi_drm_infoframe_check(frame);
- if (ret)
- return ret;
- return hdmi_drm_infoframe_pack_only(frame, buffer, size);
- }
- EXPORT_SYMBOL(hdmi_drm_infoframe_pack);
- /*
- * hdmi_vendor_any_infoframe_check() - check a vendor infoframe
- */
- static int
- hdmi_vendor_any_infoframe_check(union hdmi_vendor_any_infoframe *frame)
- {
- int ret;
- ret = hdmi_vendor_any_infoframe_check_only(frame);
- if (ret)
- return ret;
- /* we only know about HDMI vendor infoframes */
- if (frame->any.oui != HDMI_IEEE_OUI)
- return -EINVAL;
- return hdmi_vendor_infoframe_check(&frame->hdmi);
- }
- /*
- * hdmi_vendor_any_infoframe_pack_only() - write a vendor infoframe to binary buffer
- */
- static ssize_t
- hdmi_vendor_any_infoframe_pack_only(const union hdmi_vendor_any_infoframe *frame,
- void *buffer, size_t size)
- {
- int ret;
- ret = hdmi_vendor_any_infoframe_check_only(frame);
- if (ret)
- return ret;
- /* we only know about HDMI vendor infoframes */
- if (frame->any.oui != HDMI_IEEE_OUI)
- return -EINVAL;
- return hdmi_vendor_infoframe_pack_only(&frame->hdmi, buffer, size);
- }
- /*
- * hdmi_vendor_any_infoframe_pack() - check a vendor infoframe,
- * and write it to binary buffer
- */
- static ssize_t
- hdmi_vendor_any_infoframe_pack(union hdmi_vendor_any_infoframe *frame,
- void *buffer, size_t size)
- {
- int ret;
- ret = hdmi_vendor_any_infoframe_check(frame);
- if (ret)
- return ret;
- return hdmi_vendor_any_infoframe_pack_only(frame, buffer, size);
- }
- /**
- * hdmi_infoframe_check() - check a HDMI infoframe
- * @frame: HDMI infoframe
- *
- * Validates that the infoframe is consistent and updates derived fields
- * (eg. length) based on other fields.
- *
- * Returns 0 on success or a negative error code on failure.
- */
- int
- hdmi_infoframe_check(union hdmi_infoframe *frame)
- {
- switch (frame->any.type) {
- case HDMI_INFOFRAME_TYPE_AVI:
- return hdmi_avi_infoframe_check(&frame->avi);
- case HDMI_INFOFRAME_TYPE_SPD:
- return hdmi_spd_infoframe_check(&frame->spd);
- case HDMI_INFOFRAME_TYPE_AUDIO:
- return hdmi_audio_infoframe_check(&frame->audio);
- case HDMI_INFOFRAME_TYPE_VENDOR:
- return hdmi_vendor_any_infoframe_check(&frame->vendor);
- default:
- WARN(1, "Bad infoframe type %d\n", frame->any.type);
- return -EINVAL;
- }
- }
- EXPORT_SYMBOL(hdmi_infoframe_check);
- /**
- * hdmi_infoframe_pack_only() - write a HDMI infoframe to binary buffer
- * @frame: HDMI infoframe
- * @buffer: destination buffer
- * @size: size of buffer
- *
- * Packs the information contained in the @frame structure into a binary
- * representation that can be written into the corresponding controller
- * registers. Also computes the checksum as required by section 5.3.5 of
- * the HDMI 1.4 specification.
- *
- * Returns the number of bytes packed into the binary buffer or a negative
- * error code on failure.
- */
- ssize_t
- hdmi_infoframe_pack_only(const union hdmi_infoframe *frame, void *buffer, size_t size)
- {
- ssize_t length;
- switch (frame->any.type) {
- case HDMI_INFOFRAME_TYPE_AVI:
- length = hdmi_avi_infoframe_pack_only(&frame->avi,
- buffer, size);
- break;
- case HDMI_INFOFRAME_TYPE_DRM:
- length = hdmi_drm_infoframe_pack_only(&frame->drm,
- buffer, size);
- break;
- case HDMI_INFOFRAME_TYPE_SPD:
- length = hdmi_spd_infoframe_pack_only(&frame->spd,
- buffer, size);
- break;
- case HDMI_INFOFRAME_TYPE_AUDIO:
- length = hdmi_audio_infoframe_pack_only(&frame->audio,
- buffer, size);
- break;
- case HDMI_INFOFRAME_TYPE_VENDOR:
- length = hdmi_vendor_any_infoframe_pack_only(&frame->vendor,
- buffer, size);
- break;
- default:
- WARN(1, "Bad infoframe type %d\n", frame->any.type);
- length = -EINVAL;
- }
- return length;
- }
- EXPORT_SYMBOL(hdmi_infoframe_pack_only);
- /**
- * hdmi_infoframe_pack() - check a HDMI infoframe,
- * and write it to binary buffer
- * @frame: HDMI infoframe
- * @buffer: destination buffer
- * @size: size of buffer
- *
- * Validates that the infoframe is consistent and updates derived fields
- * (eg. length) based on other fields, after which it packs the information
- * contained in the @frame structure into a binary representation that
- * can be written into the corresponding controller registers. This function
- * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
- * specification.
- *
- * Returns the number of bytes packed into the binary buffer or a negative
- * error code on failure.
- */
- ssize_t
- hdmi_infoframe_pack(union hdmi_infoframe *frame,
- void *buffer, size_t size)
- {
- ssize_t length;
- switch (frame->any.type) {
- case HDMI_INFOFRAME_TYPE_AVI:
- length = hdmi_avi_infoframe_pack(&frame->avi, buffer, size);
- break;
- case HDMI_INFOFRAME_TYPE_DRM:
- length = hdmi_drm_infoframe_pack(&frame->drm, buffer, size);
- break;
- case HDMI_INFOFRAME_TYPE_SPD:
- length = hdmi_spd_infoframe_pack(&frame->spd, buffer, size);
- break;
- case HDMI_INFOFRAME_TYPE_AUDIO:
- length = hdmi_audio_infoframe_pack(&frame->audio, buffer, size);
- break;
- case HDMI_INFOFRAME_TYPE_VENDOR:
- length = hdmi_vendor_any_infoframe_pack(&frame->vendor,
- buffer, size);
- break;
- default:
- WARN(1, "Bad infoframe type %d\n", frame->any.type);
- length = -EINVAL;
- }
- return length;
- }
- EXPORT_SYMBOL(hdmi_infoframe_pack);
- static const char *hdmi_infoframe_type_get_name(enum hdmi_infoframe_type type)
- {
- if (type < 0x80 || type > 0x9f)
- return "Invalid";
- switch (type) {
- case HDMI_INFOFRAME_TYPE_VENDOR:
- return "Vendor";
- case HDMI_INFOFRAME_TYPE_AVI:
- return "Auxiliary Video Information (AVI)";
- case HDMI_INFOFRAME_TYPE_SPD:
- return "Source Product Description (SPD)";
- case HDMI_INFOFRAME_TYPE_AUDIO:
- return "Audio";
- case HDMI_INFOFRAME_TYPE_DRM:
- return "Dynamic Range and Mastering";
- }
- return "Reserved";
- }
- static void hdmi_infoframe_log_header(const char *level,
- struct device *dev,
- const struct hdmi_any_infoframe *frame)
- {
- hdmi_log("HDMI infoframe: %s, version %u, length %u\n",
- hdmi_infoframe_type_get_name(frame->type),
- frame->version, frame->length);
- }
- static const char *hdmi_colorspace_get_name(enum hdmi_colorspace colorspace)
- {
- switch (colorspace) {
- case HDMI_COLORSPACE_RGB:
- return "RGB";
- case HDMI_COLORSPACE_YUV422:
- return "YCbCr 4:2:2";
- case HDMI_COLORSPACE_YUV444:
- return "YCbCr 4:4:4";
- case HDMI_COLORSPACE_YUV420:
- return "YCbCr 4:2:0";
- case HDMI_COLORSPACE_RESERVED4:
- return "Reserved (4)";
- case HDMI_COLORSPACE_RESERVED5:
- return "Reserved (5)";
- case HDMI_COLORSPACE_RESERVED6:
- return "Reserved (6)";
- case HDMI_COLORSPACE_IDO_DEFINED:
- return "IDO Defined";
- }
- return "Invalid";
- }
- static const char *hdmi_scan_mode_get_name(enum hdmi_scan_mode scan_mode)
- {
- switch (scan_mode) {
- case HDMI_SCAN_MODE_NONE:
- return "No Data";
- case HDMI_SCAN_MODE_OVERSCAN:
- return "Overscan";
- case HDMI_SCAN_MODE_UNDERSCAN:
- return "Underscan";
- case HDMI_SCAN_MODE_RESERVED:
- return "Reserved";
- }
- return "Invalid";
- }
- static const char *hdmi_colorimetry_get_name(enum hdmi_colorimetry colorimetry)
- {
- switch (colorimetry) {
- case HDMI_COLORIMETRY_NONE:
- return "No Data";
- case HDMI_COLORIMETRY_ITU_601:
- return "ITU601";
- case HDMI_COLORIMETRY_ITU_709:
- return "ITU709";
- case HDMI_COLORIMETRY_EXTENDED:
- return "Extended";
- }
- return "Invalid";
- }
- static const char *
- hdmi_picture_aspect_get_name(enum hdmi_picture_aspect picture_aspect)
- {
- switch (picture_aspect) {
- case HDMI_PICTURE_ASPECT_NONE:
- return "No Data";
- case HDMI_PICTURE_ASPECT_4_3:
- return "4:3";
- case HDMI_PICTURE_ASPECT_16_9:
- return "16:9";
- case HDMI_PICTURE_ASPECT_64_27:
- return "64:27";
- case HDMI_PICTURE_ASPECT_256_135:
- return "256:135";
- case HDMI_PICTURE_ASPECT_RESERVED:
- return "Reserved";
- }
- return "Invalid";
- }
- static const char *
- hdmi_active_aspect_get_name(enum hdmi_active_aspect active_aspect)
- {
- if (active_aspect < 0 || active_aspect > 0xf)
- return "Invalid";
- switch (active_aspect) {
- case HDMI_ACTIVE_ASPECT_16_9_TOP:
- return "16:9 Top";
- case HDMI_ACTIVE_ASPECT_14_9_TOP:
- return "14:9 Top";
- case HDMI_ACTIVE_ASPECT_16_9_CENTER:
- return "16:9 Center";
- case HDMI_ACTIVE_ASPECT_PICTURE:
- return "Same as Picture";
- case HDMI_ACTIVE_ASPECT_4_3:
- return "4:3";
- case HDMI_ACTIVE_ASPECT_16_9:
- return "16:9";
- case HDMI_ACTIVE_ASPECT_14_9:
- return "14:9";
- case HDMI_ACTIVE_ASPECT_4_3_SP_14_9:
- return "4:3 SP 14:9";
- case HDMI_ACTIVE_ASPECT_16_9_SP_14_9:
- return "16:9 SP 14:9";
- case HDMI_ACTIVE_ASPECT_16_9_SP_4_3:
- return "16:9 SP 4:3";
- }
- return "Reserved";
- }
- static const char *
- hdmi_extended_colorimetry_get_name(enum hdmi_extended_colorimetry ext_col)
- {
- switch (ext_col) {
- case HDMI_EXTENDED_COLORIMETRY_XV_YCC_601:
- return "xvYCC 601";
- case HDMI_EXTENDED_COLORIMETRY_XV_YCC_709:
- return "xvYCC 709";
- case HDMI_EXTENDED_COLORIMETRY_S_YCC_601:
- return "sYCC 601";
- case HDMI_EXTENDED_COLORIMETRY_OPYCC_601:
- return "opYCC 601";
- case HDMI_EXTENDED_COLORIMETRY_OPRGB:
- return "opRGB";
- case HDMI_EXTENDED_COLORIMETRY_BT2020_CONST_LUM:
- return "BT.2020 Constant Luminance";
- case HDMI_EXTENDED_COLORIMETRY_BT2020:
- return "BT.2020";
- case HDMI_EXTENDED_COLORIMETRY_RESERVED:
- return "Reserved";
- }
- return "Invalid";
- }
- static const char *
- hdmi_quantization_range_get_name(enum hdmi_quantization_range qrange)
- {
- switch (qrange) {
- case HDMI_QUANTIZATION_RANGE_DEFAULT:
- return "Default";
- case HDMI_QUANTIZATION_RANGE_LIMITED:
- return "Limited";
- case HDMI_QUANTIZATION_RANGE_FULL:
- return "Full";
- case HDMI_QUANTIZATION_RANGE_RESERVED:
- return "Reserved";
- }
- return "Invalid";
- }
- static const char *hdmi_nups_get_name(enum hdmi_nups nups)
- {
- switch (nups) {
- case HDMI_NUPS_UNKNOWN:
- return "Unknown Non-uniform Scaling";
- case HDMI_NUPS_HORIZONTAL:
- return "Horizontally Scaled";
- case HDMI_NUPS_VERTICAL:
- return "Vertically Scaled";
- case HDMI_NUPS_BOTH:
- return "Horizontally and Vertically Scaled";
- }
- return "Invalid";
- }
- static const char *
- hdmi_ycc_quantization_range_get_name(enum hdmi_ycc_quantization_range qrange)
- {
- switch (qrange) {
- case HDMI_YCC_QUANTIZATION_RANGE_LIMITED:
- return "Limited";
- case HDMI_YCC_QUANTIZATION_RANGE_FULL:
- return "Full";
- }
- return "Invalid";
- }
- static const char *
- hdmi_content_type_get_name(enum hdmi_content_type content_type)
- {
- switch (content_type) {
- case HDMI_CONTENT_TYPE_GRAPHICS:
- return "Graphics";
- case HDMI_CONTENT_TYPE_PHOTO:
- return "Photo";
- case HDMI_CONTENT_TYPE_CINEMA:
- return "Cinema";
- case HDMI_CONTENT_TYPE_GAME:
- return "Game";
- }
- return "Invalid";
- }
- static void hdmi_avi_infoframe_log(const char *level,
- struct device *dev,
- const struct hdmi_avi_infoframe *frame)
- {
- hdmi_infoframe_log_header(level, dev,
- (const struct hdmi_any_infoframe *)frame);
- hdmi_log(" colorspace: %s\n",
- hdmi_colorspace_get_name(frame->colorspace));
- hdmi_log(" scan mode: %s\n",
- hdmi_scan_mode_get_name(frame->scan_mode));
- hdmi_log(" colorimetry: %s\n",
- hdmi_colorimetry_get_name(frame->colorimetry));
- hdmi_log(" picture aspect: %s\n",
- hdmi_picture_aspect_get_name(frame->picture_aspect));
- hdmi_log(" active aspect: %s\n",
- hdmi_active_aspect_get_name(frame->active_aspect));
- hdmi_log(" itc: %s\n", frame->itc ? "IT Content" : "No Data");
- hdmi_log(" extended colorimetry: %s\n",
- hdmi_extended_colorimetry_get_name(frame->extended_colorimetry));
- hdmi_log(" quantization range: %s\n",
- hdmi_quantization_range_get_name(frame->quantization_range));
- hdmi_log(" nups: %s\n", hdmi_nups_get_name(frame->nups));
- hdmi_log(" video code: %u\n", frame->video_code);
- hdmi_log(" ycc quantization range: %s\n",
- hdmi_ycc_quantization_range_get_name(frame->ycc_quantization_range));
- hdmi_log(" hdmi content type: %s\n",
- hdmi_content_type_get_name(frame->content_type));
- hdmi_log(" pixel repeat: %u\n", frame->pixel_repeat);
- hdmi_log(" bar top %u, bottom %u, left %u, right %u\n",
- frame->top_bar, frame->bottom_bar,
- frame->left_bar, frame->right_bar);
- }
- static const char *hdmi_spd_sdi_get_name(enum hdmi_spd_sdi sdi)
- {
- if (sdi < 0 || sdi > 0xff)
- return "Invalid";
- switch (sdi) {
- case HDMI_SPD_SDI_UNKNOWN:
- return "Unknown";
- case HDMI_SPD_SDI_DSTB:
- return "Digital STB";
- case HDMI_SPD_SDI_DVDP:
- return "DVD Player";
- case HDMI_SPD_SDI_DVHS:
- return "D-VHS";
- case HDMI_SPD_SDI_HDDVR:
- return "HDD Videorecorder";
- case HDMI_SPD_SDI_DVC:
- return "DVC";
- case HDMI_SPD_SDI_DSC:
- return "DSC";
- case HDMI_SPD_SDI_VCD:
- return "Video CD";
- case HDMI_SPD_SDI_GAME:
- return "Game";
- case HDMI_SPD_SDI_PC:
- return "PC General";
- case HDMI_SPD_SDI_BD:
- return "Blu-Ray Disc (BD)";
- case HDMI_SPD_SDI_SACD:
- return "Super Audio CD";
- case HDMI_SPD_SDI_HDDVD:
- return "HD DVD";
- case HDMI_SPD_SDI_PMP:
- return "PMP";
- }
- return "Reserved";
- }
- static void hdmi_spd_infoframe_log(const char *level,
- struct device *dev,
- const struct hdmi_spd_infoframe *frame)
- {
- u8 buf[17];
- hdmi_infoframe_log_header(level, dev,
- (const struct hdmi_any_infoframe *)frame);
- memset(buf, 0, sizeof(buf));
- strncpy(buf, frame->vendor, 8);
- hdmi_log(" vendor: %s\n", buf);
- strncpy(buf, frame->product, 16);
- hdmi_log(" product: %s\n", buf);
- hdmi_log(" source device information: %s (0x%x)\n",
- hdmi_spd_sdi_get_name(frame->sdi), frame->sdi);
- }
- static const char *
- hdmi_audio_coding_type_get_name(enum hdmi_audio_coding_type coding_type)
- {
- switch (coding_type) {
- case HDMI_AUDIO_CODING_TYPE_STREAM:
- return "Refer to Stream Header";
- case HDMI_AUDIO_CODING_TYPE_PCM:
- return "PCM";
- case HDMI_AUDIO_CODING_TYPE_AC3:
- return "AC-3";
- case HDMI_AUDIO_CODING_TYPE_MPEG1:
- return "MPEG1";
- case HDMI_AUDIO_CODING_TYPE_MP3:
- return "MP3";
- case HDMI_AUDIO_CODING_TYPE_MPEG2:
- return "MPEG2";
- case HDMI_AUDIO_CODING_TYPE_AAC_LC:
- return "AAC";
- case HDMI_AUDIO_CODING_TYPE_DTS:
- return "DTS";
- case HDMI_AUDIO_CODING_TYPE_ATRAC:
- return "ATRAC";
- case HDMI_AUDIO_CODING_TYPE_DSD:
- return "One Bit Audio";
- case HDMI_AUDIO_CODING_TYPE_EAC3:
- return "Dolby Digital +";
- case HDMI_AUDIO_CODING_TYPE_DTS_HD:
- return "DTS-HD";
- case HDMI_AUDIO_CODING_TYPE_MLP:
- return "MAT (MLP)";
- case HDMI_AUDIO_CODING_TYPE_DST:
- return "DST";
- case HDMI_AUDIO_CODING_TYPE_WMA_PRO:
- return "WMA PRO";
- case HDMI_AUDIO_CODING_TYPE_CXT:
- return "Refer to CXT";
- }
- return "Invalid";
- }
- static const char *
- hdmi_audio_sample_size_get_name(enum hdmi_audio_sample_size sample_size)
- {
- switch (sample_size) {
- case HDMI_AUDIO_SAMPLE_SIZE_STREAM:
- return "Refer to Stream Header";
- case HDMI_AUDIO_SAMPLE_SIZE_16:
- return "16 bit";
- case HDMI_AUDIO_SAMPLE_SIZE_20:
- return "20 bit";
- case HDMI_AUDIO_SAMPLE_SIZE_24:
- return "24 bit";
- }
- return "Invalid";
- }
- static const char *
- hdmi_audio_sample_frequency_get_name(enum hdmi_audio_sample_frequency freq)
- {
- switch (freq) {
- case HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM:
- return "Refer to Stream Header";
- case HDMI_AUDIO_SAMPLE_FREQUENCY_32000:
- return "32 kHz";
- case HDMI_AUDIO_SAMPLE_FREQUENCY_44100:
- return "44.1 kHz (CD)";
- case HDMI_AUDIO_SAMPLE_FREQUENCY_48000:
- return "48 kHz";
- case HDMI_AUDIO_SAMPLE_FREQUENCY_88200:
- return "88.2 kHz";
- case HDMI_AUDIO_SAMPLE_FREQUENCY_96000:
- return "96 kHz";
- case HDMI_AUDIO_SAMPLE_FREQUENCY_176400:
- return "176.4 kHz";
- case HDMI_AUDIO_SAMPLE_FREQUENCY_192000:
- return "192 kHz";
- }
- return "Invalid";
- }
- static const char *
- hdmi_audio_coding_type_ext_get_name(enum hdmi_audio_coding_type_ext ctx)
- {
- if (ctx < 0 || ctx > 0x1f)
- return "Invalid";
- switch (ctx) {
- case HDMI_AUDIO_CODING_TYPE_EXT_CT:
- return "Refer to CT";
- case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC:
- return "HE AAC";
- case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC_V2:
- return "HE AAC v2";
- case HDMI_AUDIO_CODING_TYPE_EXT_MPEG_SURROUND:
- return "MPEG SURROUND";
- case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC:
- return "MPEG-4 HE AAC";
- case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_V2:
- return "MPEG-4 HE AAC v2";
- case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC:
- return "MPEG-4 AAC LC";
- case HDMI_AUDIO_CODING_TYPE_EXT_DRA:
- return "DRA";
- case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_SURROUND:
- return "MPEG-4 HE AAC + MPEG Surround";
- case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC_SURROUND:
- return "MPEG-4 AAC LC + MPEG Surround";
- }
- return "Reserved";
- }
- static void hdmi_audio_infoframe_log(const char *level,
- struct device *dev,
- const struct hdmi_audio_infoframe *frame)
- {
- hdmi_infoframe_log_header(level, dev,
- (const struct hdmi_any_infoframe *)frame);
- if (frame->channels)
- hdmi_log(" channels: %u\n", frame->channels - 1);
- else
- hdmi_log(" channels: Refer to stream header\n");
- hdmi_log(" coding type: %s\n",
- hdmi_audio_coding_type_get_name(frame->coding_type));
- hdmi_log(" sample size: %s\n",
- hdmi_audio_sample_size_get_name(frame->sample_size));
- hdmi_log(" sample frequency: %s\n",
- hdmi_audio_sample_frequency_get_name(frame->sample_frequency));
- hdmi_log(" coding type ext: %s\n",
- hdmi_audio_coding_type_ext_get_name(frame->coding_type_ext));
- hdmi_log(" channel allocation: 0x%x\n",
- frame->channel_allocation);
- hdmi_log(" level shift value: %u dB\n",
- frame->level_shift_value);
- hdmi_log(" downmix inhibit: %s\n",
- frame->downmix_inhibit ? "Yes" : "No");
- }
- static void hdmi_drm_infoframe_log(const char *level,
- struct device *dev,
- const struct hdmi_drm_infoframe *frame)
- {
- int i;
- hdmi_infoframe_log_header(level, dev,
- (struct hdmi_any_infoframe *)frame);
- hdmi_log("length: %d\n", frame->length);
- hdmi_log("metadata type: %d\n", frame->metadata_type);
- hdmi_log("eotf: %d\n", frame->eotf);
- for (i = 0; i < 3; i++) {
- hdmi_log("x[%d]: %d\n", i, frame->display_primaries[i].x);
- hdmi_log("y[%d]: %d\n", i, frame->display_primaries[i].y);
- }
- hdmi_log("white point x: %d\n", frame->white_point.x);
- hdmi_log("white point y: %d\n", frame->white_point.y);
- hdmi_log("max_display_mastering_luminance: %d\n",
- frame->max_display_mastering_luminance);
- hdmi_log("min_display_mastering_luminance: %d\n",
- frame->min_display_mastering_luminance);
- hdmi_log("max_cll: %d\n", frame->max_cll);
- hdmi_log("max_fall: %d\n", frame->max_fall);
- }
- static const char *
- hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct)
- {
- if (s3d_struct < 0 || s3d_struct > 0xf)
- return "Invalid";
- switch (s3d_struct) {
- case HDMI_3D_STRUCTURE_FRAME_PACKING:
- return "Frame Packing";
- case HDMI_3D_STRUCTURE_FIELD_ALTERNATIVE:
- return "Field Alternative";
- case HDMI_3D_STRUCTURE_LINE_ALTERNATIVE:
- return "Line Alternative";
- case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_FULL:
- return "Side-by-side (Full)";
- case HDMI_3D_STRUCTURE_L_DEPTH:
- return "L + Depth";
- case HDMI_3D_STRUCTURE_L_DEPTH_GFX_GFX_DEPTH:
- return "L + Depth + Graphics + Graphics-depth";
- case HDMI_3D_STRUCTURE_TOP_AND_BOTTOM:
- return "Top-and-Bottom";
- case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF:
- return "Side-by-side (Half)";
- default:
- break;
- }
- return "Reserved";
- }
- static void
- hdmi_vendor_any_infoframe_log(const char *level,
- struct device *dev,
- const union hdmi_vendor_any_infoframe *frame)
- {
- const struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
- hdmi_infoframe_log_header(level, dev,
- (const struct hdmi_any_infoframe *)frame);
- if (frame->any.oui != HDMI_IEEE_OUI) {
- hdmi_log(" not a HDMI vendor infoframe\n");
- return;
- }
- if (hvf->vic == 0 && hvf->s3d_struct == HDMI_3D_STRUCTURE_INVALID) {
- hdmi_log(" empty frame\n");
- return;
- }
- if (hvf->vic)
- hdmi_log(" HDMI VIC: %u\n", hvf->vic);
- if (hvf->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
- hdmi_log(" 3D structure: %s\n",
- hdmi_3d_structure_get_name(hvf->s3d_struct));
- if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
- hdmi_log(" 3D extension data: %d\n",
- hvf->s3d_ext_data);
- }
- }
- /**
- * hdmi_infoframe_log() - log info of HDMI infoframe
- * @level: logging level
- * @dev: device
- * @frame: HDMI infoframe
- */
- void hdmi_infoframe_log(const char *level,
- struct device *dev,
- const union hdmi_infoframe *frame)
- {
- switch (frame->any.type) {
- case HDMI_INFOFRAME_TYPE_AVI:
- hdmi_avi_infoframe_log(level, dev, &frame->avi);
- break;
- case HDMI_INFOFRAME_TYPE_SPD:
- hdmi_spd_infoframe_log(level, dev, &frame->spd);
- break;
- case HDMI_INFOFRAME_TYPE_AUDIO:
- hdmi_audio_infoframe_log(level, dev, &frame->audio);
- break;
- case HDMI_INFOFRAME_TYPE_VENDOR:
- hdmi_vendor_any_infoframe_log(level, dev, &frame->vendor);
- break;
- case HDMI_INFOFRAME_TYPE_DRM:
- hdmi_drm_infoframe_log(level, dev, &frame->drm);
- break;
- }
- }
- EXPORT_SYMBOL(hdmi_infoframe_log);
- /**
- * hdmi_avi_infoframe_unpack() - unpack binary buffer to a HDMI AVI infoframe
- * @frame: HDMI AVI infoframe
- * @buffer: source buffer
- * @size: size of buffer
- *
- * Unpacks the information contained in binary @buffer into a structured
- * @frame of the HDMI Auxiliary Video (AVI) information frame.
- * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
- * specification.
- *
- * Returns 0 on success or a negative error code on failure.
- */
- static int hdmi_avi_infoframe_unpack(struct hdmi_avi_infoframe *frame,
- const void *buffer, size_t size)
- {
- const u8 *ptr = buffer;
- if (size < HDMI_INFOFRAME_SIZE(AVI))
- return -EINVAL;
- if (ptr[0] != HDMI_INFOFRAME_TYPE_AVI ||
- ptr[1] != 2 ||
- ptr[2] != HDMI_AVI_INFOFRAME_SIZE)
- return -EINVAL;
- if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AVI)) != 0)
- return -EINVAL;
- hdmi_avi_infoframe_init(frame);
- ptr += HDMI_INFOFRAME_HEADER_SIZE;
- frame->colorspace = (ptr[0] >> 5) & 0x3;
- if (ptr[0] & 0x10)
- frame->active_aspect = ptr[1] & 0xf;
- if (ptr[0] & 0x8) {
- frame->top_bar = (ptr[6] << 8) | ptr[5];
- frame->bottom_bar = (ptr[8] << 8) | ptr[7];
- }
- if (ptr[0] & 0x4) {
- frame->left_bar = (ptr[10] << 8) | ptr[9];
- frame->right_bar = (ptr[12] << 8) | ptr[11];
- }
- frame->scan_mode = ptr[0] & 0x3;
- frame->colorimetry = (ptr[1] >> 6) & 0x3;
- frame->picture_aspect = (ptr[1] >> 4) & 0x3;
- frame->active_aspect = ptr[1] & 0xf;
- frame->itc = ptr[2] & 0x80 ? true : false;
- frame->extended_colorimetry = (ptr[2] >> 4) & 0x7;
- frame->quantization_range = (ptr[2] >> 2) & 0x3;
- frame->nups = ptr[2] & 0x3;
- frame->video_code = ptr[3] & 0x7f;
- frame->ycc_quantization_range = (ptr[4] >> 6) & 0x3;
- frame->content_type = (ptr[4] >> 4) & 0x3;
- frame->pixel_repeat = ptr[4] & 0xf;
- return 0;
- }
- /**
- * hdmi_spd_infoframe_unpack() - unpack binary buffer to a HDMI SPD infoframe
- * @frame: HDMI SPD infoframe
- * @buffer: source buffer
- * @size: size of buffer
- *
- * Unpacks the information contained in binary @buffer into a structured
- * @frame of the HDMI Source Product Description (SPD) information frame.
- * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
- * specification.
- *
- * Returns 0 on success or a negative error code on failure.
- */
- static int hdmi_spd_infoframe_unpack(struct hdmi_spd_infoframe *frame,
- const void *buffer, size_t size)
- {
- const u8 *ptr = buffer;
- int ret;
- if (size < HDMI_INFOFRAME_SIZE(SPD))
- return -EINVAL;
- if (ptr[0] != HDMI_INFOFRAME_TYPE_SPD ||
- ptr[1] != 1 ||
- ptr[2] != HDMI_SPD_INFOFRAME_SIZE) {
- return -EINVAL;
- }
- if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(SPD)) != 0)
- return -EINVAL;
- ptr += HDMI_INFOFRAME_HEADER_SIZE;
- ret = hdmi_spd_infoframe_init(frame, ptr, ptr + 8);
- if (ret)
- return ret;
- frame->sdi = ptr[24];
- return 0;
- }
- /**
- * hdmi_audio_infoframe_unpack() - unpack binary buffer to a HDMI AUDIO infoframe
- * @frame: HDMI Audio infoframe
- * @buffer: source buffer
- * @size: size of buffer
- *
- * Unpacks the information contained in binary @buffer into a structured
- * @frame of the HDMI Audio information frame.
- * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
- * specification.
- *
- * Returns 0 on success or a negative error code on failure.
- */
- static int hdmi_audio_infoframe_unpack(struct hdmi_audio_infoframe *frame,
- const void *buffer, size_t size)
- {
- const u8 *ptr = buffer;
- int ret;
- if (size < HDMI_INFOFRAME_SIZE(AUDIO))
- return -EINVAL;
- if (ptr[0] != HDMI_INFOFRAME_TYPE_AUDIO ||
- ptr[1] != 1 ||
- ptr[2] != HDMI_AUDIO_INFOFRAME_SIZE) {
- return -EINVAL;
- }
- if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AUDIO)) != 0)
- return -EINVAL;
- ret = hdmi_audio_infoframe_init(frame);
- if (ret)
- return ret;
- ptr += HDMI_INFOFRAME_HEADER_SIZE;
- frame->channels = ptr[0] & 0x7;
- frame->coding_type = (ptr[0] >> 4) & 0xf;
- frame->sample_size = ptr[1] & 0x3;
- frame->sample_frequency = (ptr[1] >> 2) & 0x7;
- frame->coding_type_ext = ptr[2] & 0x1f;
- frame->channel_allocation = ptr[3];
- frame->level_shift_value = (ptr[4] >> 3) & 0xf;
- frame->downmix_inhibit = ptr[4] & 0x80 ? true : false;
- return 0;
- }
- /**
- * hdmi_vendor_any_infoframe_unpack() - unpack binary buffer to a HDMI
- * vendor infoframe
- * @frame: HDMI Vendor infoframe
- * @buffer: source buffer
- * @size: size of buffer
- *
- * Unpacks the information contained in binary @buffer into a structured
- * @frame of the HDMI Vendor information frame.
- * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
- * specification.
- *
- * Returns 0 on success or a negative error code on failure.
- */
- static int
- hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame,
- const void *buffer, size_t size)
- {
- const u8 *ptr = buffer;
- size_t length;
- int ret;
- u8 hdmi_video_format;
- struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
- if (size < HDMI_INFOFRAME_HEADER_SIZE)
- return -EINVAL;
- if (ptr[0] != HDMI_INFOFRAME_TYPE_VENDOR ||
- ptr[1] != 1 ||
- (ptr[2] != 4 && ptr[2] != 5 && ptr[2] != 6))
- return -EINVAL;
- length = ptr[2];
- if (size < HDMI_INFOFRAME_HEADER_SIZE + length)
- return -EINVAL;
- if (hdmi_infoframe_checksum(buffer,
- HDMI_INFOFRAME_HEADER_SIZE + length) != 0)
- return -EINVAL;
- ptr += HDMI_INFOFRAME_HEADER_SIZE;
- /* HDMI OUI */
- if ((ptr[0] != 0x03) ||
- (ptr[1] != 0x0c) ||
- (ptr[2] != 0x00))
- return -EINVAL;
- hdmi_video_format = ptr[3] >> 5;
- if (hdmi_video_format > 0x2)
- return -EINVAL;
- ret = hdmi_vendor_infoframe_init(hvf);
- if (ret)
- return ret;
- hvf->length = length;
- if (hdmi_video_format == 0x2) {
- if (length != 5 && length != 6)
- return -EINVAL;
- hvf->s3d_struct = ptr[4] >> 4;
- if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF) {
- if (length != 6)
- return -EINVAL;
- hvf->s3d_ext_data = ptr[5] >> 4;
- }
- } else if (hdmi_video_format == 0x1) {
- if (length != 5)
- return -EINVAL;
- hvf->vic = ptr[4];
- } else {
- if (length != 4)
- return -EINVAL;
- }
- return 0;
- }
- /**
- * hdmi_drm_infoframe_unpack_only() - unpack binary buffer of CTA-861-G DRM
- * infoframe DataBytes to a HDMI DRM
- * infoframe
- * @frame: HDMI DRM infoframe
- * @buffer: source buffer
- * @size: size of buffer
- *
- * Unpacks CTA-861-G DRM infoframe DataBytes contained in the binary @buffer
- * into a structured @frame of the HDMI Dynamic Range and Mastering (DRM)
- * infoframe.
- *
- * Returns 0 on success or a negative error code on failure.
- */
- int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe *frame,
- const void *buffer, size_t size)
- {
- const u8 *ptr = buffer;
- const u8 *temp;
- u8 x_lsb, x_msb;
- u8 y_lsb, y_msb;
- int ret;
- int i;
- if (size < HDMI_DRM_INFOFRAME_SIZE)
- return -EINVAL;
- ret = hdmi_drm_infoframe_init(frame);
- if (ret)
- return ret;
- frame->eotf = ptr[0] & 0x7;
- frame->metadata_type = ptr[1] & 0x7;
- temp = ptr + 2;
- for (i = 0; i < 3; i++) {
- x_lsb = *temp++;
- x_msb = *temp++;
- frame->display_primaries[i].x = (x_msb << 8) | x_lsb;
- y_lsb = *temp++;
- y_msb = *temp++;
- frame->display_primaries[i].y = (y_msb << 8) | y_lsb;
- }
- frame->white_point.x = (ptr[15] << 8) | ptr[14];
- frame->white_point.y = (ptr[17] << 8) | ptr[16];
- frame->max_display_mastering_luminance = (ptr[19] << 8) | ptr[18];
- frame->min_display_mastering_luminance = (ptr[21] << 8) | ptr[20];
- frame->max_cll = (ptr[23] << 8) | ptr[22];
- frame->max_fall = (ptr[25] << 8) | ptr[24];
- return 0;
- }
- EXPORT_SYMBOL(hdmi_drm_infoframe_unpack_only);
- /**
- * hdmi_drm_infoframe_unpack() - unpack binary buffer to a HDMI DRM infoframe
- * @frame: HDMI DRM infoframe
- * @buffer: source buffer
- * @size: size of buffer
- *
- * Unpacks the CTA-861-G DRM infoframe contained in the binary @buffer into
- * a structured @frame of the HDMI Dynamic Range and Mastering (DRM)
- * infoframe. It also verifies the checksum as required by section 5.3.5 of
- * the HDMI 1.4 specification.
- *
- * Returns 0 on success or a negative error code on failure.
- */
- static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
- const void *buffer, size_t size)
- {
- const u8 *ptr = buffer;
- int ret;
- if (size < HDMI_INFOFRAME_SIZE(DRM))
- return -EINVAL;
- if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
- ptr[1] != 1 ||
- ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
- return -EINVAL;
- if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(DRM)) != 0)
- return -EINVAL;
- ret = hdmi_drm_infoframe_unpack_only(frame, ptr + HDMI_INFOFRAME_HEADER_SIZE,
- size - HDMI_INFOFRAME_HEADER_SIZE);
- return ret;
- }
- /**
- * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe
- * @frame: HDMI infoframe
- * @buffer: source buffer
- * @size: size of buffer
- *
- * Unpacks the information contained in binary buffer @buffer into a structured
- * @frame of a HDMI infoframe.
- * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
- * specification.
- *
- * Returns 0 on success or a negative error code on failure.
- */
- int hdmi_infoframe_unpack(union hdmi_infoframe *frame,
- const void *buffer, size_t size)
- {
- int ret;
- const u8 *ptr = buffer;
- if (size < HDMI_INFOFRAME_HEADER_SIZE)
- return -EINVAL;
- switch (ptr[0]) {
- case HDMI_INFOFRAME_TYPE_AVI:
- ret = hdmi_avi_infoframe_unpack(&frame->avi, buffer, size);
- break;
- case HDMI_INFOFRAME_TYPE_DRM:
- ret = hdmi_drm_infoframe_unpack(&frame->drm, buffer, size);
- break;
- case HDMI_INFOFRAME_TYPE_SPD:
- ret = hdmi_spd_infoframe_unpack(&frame->spd, buffer, size);
- break;
- case HDMI_INFOFRAME_TYPE_AUDIO:
- ret = hdmi_audio_infoframe_unpack(&frame->audio, buffer, size);
- break;
- case HDMI_INFOFRAME_TYPE_VENDOR:
- ret = hdmi_vendor_any_infoframe_unpack(&frame->vendor, buffer, size);
- break;
- default:
- ret = -EINVAL;
- break;
- }
- return ret;
- }
- EXPORT_SYMBOL(hdmi_infoframe_unpack);
|