diff options
| -rw-r--r-- | drivers/video/hdmi.c | 822 | ||||
| -rw-r--r-- | include/linux/hdmi.h | 4 |
2 files changed, 819 insertions, 7 deletions
diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c index 9e758a8f890..a7c6ae4e10e 100644 --- a/drivers/video/hdmi.c +++ b/drivers/video/hdmi.c @@ -27,10 +27,12 @@ #include <linux/export.h> #include <linux/hdmi.h> #include <linux/string.h> +#include <linux/device.h> -static void hdmi_infoframe_checksum(void *buffer, size_t size) +#define hdmi_log(fmt, ...) dev_printk(level, dev, fmt, ##__VA_ARGS__) + +static u8 hdmi_infoframe_checksum(u8 *ptr, size_t size) { - u8 *ptr = buffer; u8 csum = 0; size_t i; @@ -38,7 +40,14 @@ static void hdmi_infoframe_checksum(void *buffer, size_t size) for (i = 0; i < size; i++) csum += ptr[i]; - ptr[3] = 256 - csum; + return 256 - csum; +} + +static void hdmi_infoframe_set_checksum(void *buffer, size_t size) +{ + u8 *ptr = buffer; + + ptr[3] = hdmi_infoframe_checksum(buffer, size); } /** @@ -136,7 +145,7 @@ ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame, void *buffer, ptr[11] = frame->right_bar & 0xff; ptr[12] = (frame->right_bar >> 8) & 0xff; - hdmi_infoframe_checksum(buffer, length); + hdmi_infoframe_set_checksum(buffer, length); return length; } @@ -206,7 +215,7 @@ ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame, void *buffer, ptr[24] = frame->sdi; - hdmi_infoframe_checksum(buffer, length); + hdmi_infoframe_set_checksum(buffer, length); return length; } @@ -281,7 +290,7 @@ ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame, if (frame->downmix_inhibit) ptr[4] |= BIT(7); - hdmi_infoframe_checksum(buffer, length); + hdmi_infoframe_set_checksum(buffer, length); return length; } @@ -373,7 +382,7 @@ ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame, ptr[9] = (frame->s3d_ext_data & 0xf) << 4; } - hdmi_infoframe_checksum(buffer, length); + hdmi_infoframe_set_checksum(buffer, length); return length; } @@ -434,3 +443,802 @@ hdmi_infoframe_pack(union hdmi_infoframe *frame, void *buffer, size_t size) 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"; + } + return "Reserved"; +} + +static void hdmi_infoframe_log_header(const char *level, + struct device *dev, + 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_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_ADOBE_YCC_601: + return "Adobe YCC 601"; + case HDMI_EXTENDED_COLORIMETRY_ADOBE_RGB: + return "Adobe RGB"; + 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"; +} + +/** + * hdmi_avi_infoframe_log() - log info of HDMI AVI infoframe + * @level: logging level + * @dev: device + * @frame: HDMI AVI infoframe + */ +static void hdmi_avi_infoframe_log(const char *level, + struct device *dev, + struct hdmi_avi_infoframe *frame) +{ + hdmi_infoframe_log_header(level, dev, + (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"; +} + +/** + * hdmi_spd_infoframe_log() - log info of HDMI SPD infoframe + * @level: logging level + * @dev: device + * @frame: HDMI SPD infoframe + */ +static void hdmi_spd_infoframe_log(const char *level, + struct device *dev, + struct hdmi_spd_infoframe *frame) +{ + u8 buf[17]; + + hdmi_infoframe_log_header(level, dev, + (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_STREAM: + 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"; +} + +/** + * hdmi_audio_infoframe_log() - log info of HDMI AUDIO infoframe + * @level: logging level + * @dev: device + * @frame: HDMI AUDIO infoframe + */ +static void hdmi_audio_infoframe_log(const char *level, + struct device *dev, + struct hdmi_audio_infoframe *frame) +{ + hdmi_infoframe_log_header(level, dev, + (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 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"; +} + +/** + * hdmi_vendor_infoframe_log() - log info of HDMI VENDOR infoframe + * @level: logging level + * @dev: device + * @frame: HDMI VENDOR infoframe + */ +static void +hdmi_vendor_any_infoframe_log(const char *level, + struct device *dev, + union hdmi_vendor_any_infoframe *frame) +{ + struct hdmi_vendor_infoframe *hvf = &frame->hdmi; + + hdmi_infoframe_log_header(level, dev, + (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, + 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; + } +} +EXPORT_SYMBOL(hdmi_infoframe_log); + +/** + * hdmi_avi_infoframe_unpack() - unpack binary buffer to a HDMI AVI infoframe + * @buffer: source buffer + * @frame: HDMI AVI infoframe + * + * 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, + void *buffer) +{ + u8 *ptr = buffer; + int ret; + + 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; + + ret = hdmi_avi_infoframe_init(frame); + if (ret) + return ret; + + 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[5] << 8) + ptr[6]; + frame->bottom_bar = (ptr[7] << 8) + ptr[8]; + } + if (ptr[0] & 0x4) { + frame->left_bar = (ptr[9] << 8) + ptr[10]; + frame->right_bar = (ptr[11] << 8) + ptr[12]; + } + 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 + * @buffer: source buffer + * @frame: HDMI SPD infoframe + * + * 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, + void *buffer) +{ + u8 *ptr = buffer; + int ret; + + 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 + * @buffer: source buffer + * @frame: HDMI Audio infoframe + * + * 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, + void *buffer) +{ + u8 *ptr = buffer; + int ret; + + 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_infoframe_unpack() - unpack binary buffer to a HDMI vendor infoframe + * @buffer: source buffer + * @frame: HDMI Vendor infoframe + * + * 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, + void *buffer) +{ + u8 *ptr = buffer; + size_t length; + int ret; + u8 hdmi_video_format; + struct hdmi_vendor_infoframe *hvf = &frame->hdmi; + + if (ptr[0] != HDMI_INFOFRAME_TYPE_VENDOR || + ptr[1] != 1 || + (ptr[2] != 5 && ptr[2] != 6)) + return -EINVAL; + + length = ptr[2]; + + 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 == 0x1) { + hvf->vic = ptr[4]; + } else if (hdmi_video_format == 0x2) { + hvf->s3d_struct = ptr[4] >> 4; + if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF) { + if (length == 6) + hvf->s3d_ext_data = ptr[5] >> 4; + else + return -EINVAL; + } + } + + return 0; +} + +/** + * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe + * @buffer: source buffer + * @frame: HDMI infoframe + * + * 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, void *buffer) +{ + int ret; + u8 *ptr = buffer; + + switch (ptr[0]) { + case HDMI_INFOFRAME_TYPE_AVI: + ret = hdmi_avi_infoframe_unpack(&frame->avi, buffer); + break; + case HDMI_INFOFRAME_TYPE_SPD: + ret = hdmi_spd_infoframe_unpack(&frame->spd, buffer); + break; + case HDMI_INFOFRAME_TYPE_AUDIO: + ret = hdmi_audio_infoframe_unpack(&frame->audio, buffer); + break; + case HDMI_INFOFRAME_TYPE_VENDOR: + ret = hdmi_vendor_any_infoframe_unpack(&frame->vendor, buffer); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} +EXPORT_SYMBOL(hdmi_infoframe_unpack); diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h index 5afc0bff2bb..2ff34315a1b 100644 --- a/include/linux/hdmi.h +++ b/include/linux/hdmi.h @@ -25,6 +25,7 @@ #define __LINUX_HDMI_H_ #include <linux/types.h> +#include <linux/device.h> enum hdmi_infoframe_type { HDMI_INFOFRAME_TYPE_VENDOR = 0x81, @@ -327,5 +328,8 @@ union hdmi_infoframe { ssize_t hdmi_infoframe_pack(union hdmi_infoframe *frame, void *buffer, size_t size); +int hdmi_infoframe_unpack(union hdmi_infoframe *frame, void *buffer); +void hdmi_infoframe_log(const char *level, struct device *dev, + union hdmi_infoframe *frame); #endif /* _DRM_HDMI_H */ |