/
vc_hdmi.lua
484 lines (441 loc) · 18.9 KB
/
vc_hdmi.lua
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local ffi = require "ffi"
--[[
* HDMI common host header for TV service, defines resolution code which host applications should
* use for power up command for HDMI
--]]
require "vc_hdmi_property" -- All HDMI related properties have been moved to here
ffi.cdef[[
typedef int VC_HDMI_BOOL_T;
/**
* HDMI resolution groups. There are two main groups:
* CEA - the conventional HDMI ones like 720p
* DMT - computer monitor resolutions like XGA
*/
typedef enum {
HDMI_RES_GROUP_INVALID = 0, /**< Initialised value */
HDMI_RES_GROUP_CEA = 1, /**< CEA - HDMI device */
HDMI_RES_GROUP_DMT = 2, /**< DMT - computer monitors */
HDMI_RES_GROUP_CEA_3D = 3 /**< CEA 3D mode (for 3D displays only) */
} HDMI_RES_GROUP_T;
]]
local GROUP_NAME = {
[ffi.C.HDMI_RES_GROUP_INVALID] = "Invalid";
[ffi.C.HDMI_RES_GROUP_CEA] = "CEA";
[ffi.C.HDMI_RES_GROUP_DMT] = "DMT";
[ffi.C.HDMI_RES_GROUP_CEA_3D] = "CEA_3D";
}
HDMI_RES_GROUP_NAME = function(g)
return GROUP_NAME[g] or "Unknown";
end
ffi.cdef[[
/**
* CEA 861-B defined video code and aspect ratios for various HDMI modes
*/
typedef enum {
HDMI_ASPECT_UNKNOWN = 0, /**< Unknown aspect ratio */
HDMI_ASPECT_4_3 = 1, /**< 4:3 */
HDMI_ASPECT_14_9 = 2, /**< 14:9 */
HDMI_ASPECT_16_9 = 3 /**< 16:9 */
} HDMI_ASPECT_T;
/**
* Display options set the bounding box (only used in CEA mode)
*/
typedef struct {
HDMI_ASPECT_T aspect;
/** Active area information - meanings as in CEA-861. */
VC_HDMI_BOOL_T vertical_bar_present;
uint16_t left_bar_width;
uint16_t right_bar_width;
VC_HDMI_BOOL_T horizontal_bar_present;
uint16_t top_bar_height;
uint16_t bottom_bar_height;
/** S0/S1 flags as defined in CEA-861. */
uint8_t overscan_flags;
} HDMI_DISPLAY_OPTIONS_T;
/**
* Copy protection for HDMI, only HDCP is available
* This enum is to make it consistent with the enums
* SDTV_CP_MODE_T in vc_sdtv.h
*/
typedef enum {
HDMI_CP_NONE = 0, /**< No copyprotection */
HDMI_CP_HDCP = 1 /**< HDCP 1.x */
} HDMI_CP_MODE_T;
/**
* HDMI operation modes
*/
typedef enum {
HDMI_MODE_OFF, /**< Off! */
HDMI_MODE_DVI, /**< DVI */
HDMI_MODE_HDMI, /**< HDMI */
HDMI_MODE_3D /**< HDMI 1.4a 3D */
} HDMI_MODE_T;
/**
* Possible values for the Source Product Description type code (in SPD infoframe).
* Taken from the CEA-861 spec.
*/
typedef enum {
HDMI_SPD_TYPE_UNKNOWN,
HDMI_SPD_TYPE_STB, /**<Digital STB */
HDMI_SPD_TYPE_DVD, /**<DVD player */
HDMI_SPD_TYPE_DVHS, /**<D-VHS */
HDMI_SPD_TYPE_HDD_RECORDER, /**<HDD video recoder */
HDMI_SPD_TYPE_DVC, /**<DVC */
HDMI_SPD_TYPE_DSC, /**<DSC */
HDMI_SPD_TYPE_VCD, /**<Video CD */
HDMI_SPD_TYPE_GAME, /**<Game */
HDMI_SPD_TYPE_PC, /**<PC general */
HDMI_SPD_TYPE_BD, /**<Blu-Ray Disc */
HDMI_SPD_TYPE_SACD, /**<Super Audio CD */
HDMI_SPD_TYPE_HDDVD, /**<HD DVD */
HDMI_SPD_TYPE_PMP /**<Personal media player */
} HDMI_SPD_TYPE_CODE_T;
/**
* Structure for SPD infoframe
*/
typedef struct {
char *manufacturer; /**< Manufacture name (up to 8 characters) */
char *description; /**< Product name (up to 16 characters) */
HDMI_SPD_TYPE_CODE_T type; /**< Product type */
} HDMI_SPD_DATA_T;
/**
* These are CEA mode numbers (sent in AVI infoframe) for different resolutions as define in CEA-861
* 1080i at 100/120Hz (40,46) are supported by HDMI H/W but note we cannot
* display the debug overlay under these modes.
* Some modes have two codes, the first one has aspect ratio 4:3 and
* the second one (with "H" suffix") 16:9.
* The modes with "4x", etc. are the same the corresponding "non-multiplied" modes
* but clocked at a higher pixel clock.
*/
typedef enum {
HDMI_CEA_VGA = 1,
HDMI_CEA_480p60 = 2,
HDMI_CEA_480p60H = 3,
HDMI_CEA_720p60 = 4,
HDMI_CEA_1080i60 = 5,
HDMI_CEA_480i60 = 6,
HDMI_CEA_480i60H = 7,
HDMI_CEA_240p60 = 8,
HDMI_CEA_240p60H = 9,
HDMI_CEA_480i60_4x = 10,
HDMI_CEA_480i60_4xH = 11,
HDMI_CEA_240p60_4x = 12,
HDMI_CEA_240p60_4xH = 13,
HDMI_CEA_480p60_2x = 14,
HDMI_CEA_480p60_2xH = 15,
HDMI_CEA_1080p60 = 16,
HDMI_CEA_576p50 = 17,
HDMI_CEA_576p50H = 18,
HDMI_CEA_720p50 = 19,
HDMI_CEA_1080i50 = 20,
HDMI_CEA_576i50 = 21,
HDMI_CEA_576i50H = 22,
HDMI_CEA_288p50 = 23,
HDMI_CEA_288p50H = 24,
HDMI_CEA_576i50_4x = 25,
HDMI_CEA_576i50_4xH = 26,
HDMI_CEA_288p50_4x = 27,
HDMI_CEA_288p50_4xH = 28,
HDMI_CEA_576p50_2x = 29,
HDMI_CEA_576p50_2xH = 30,
HDMI_CEA_1080p50 = 31,
HDMI_CEA_1080p24 = 32,
HDMI_CEA_1080p25 = 33,
HDMI_CEA_1080p30 = 34,
HDMI_CEA_480p60_4x = 35,
HDMI_CEA_480p60_4xH = 36,
HDMI_CEA_576p50_4x = 37,
HDMI_CEA_576p50_4xH = 38,
HDMI_CEA_1080i50_rb = 39,
HDMI_CEA_1080i100 = 40,
HDMI_CEA_720p100 = 41,
HDMI_CEA_576p100 = 42,
HDMI_CEA_576p100H = 43,
HDMI_CEA_576i100 = 44,
HDMI_CEA_576i100H = 45,
HDMI_CEA_1080i120 = 46,
HDMI_CEA_720p120 = 47,
HDMI_CEA_480p120 = 48,
HDMI_CEA_480p120H = 49,
HDMI_CEA_480i120 = 50,
HDMI_CEA_480i120H = 51,
HDMI_CEA_576p200 = 52,
HDMI_CEA_576p200H = 53,
HDMI_CEA_576i200 = 54,
HDMI_CEA_576i200H = 55,
HDMI_CEA_480p240 = 56,
HDMI_CEA_480p240H = 57,
HDMI_CEA_480i240 = 58,
HDMI_CEA_480i240H = 59,
HDMI_CEA_720p24 = 60,
HDMI_CEA_720p25 = 61,
HDMI_CEA_720p30 = 62,
HDMI_CEA_1080p120 = 63,
HDMI_CEA_1080p100 = 64,
//Up-to-date as of CEA 861-E
HDMI_CEA_OFF = 0xff /**<Special code to shutdown HDMI */
} HDMI_CEA_RES_CODE_T;
/**
* These are the DMT modes from VESA. They are used for powering up
* HDMI in DMT resolutions and are not sent in AVI infoframes.
* Enum is ordered as ascending order of DMT id.
* All reduced blanking formats are 60Hz unless stated otherwise.
*/
typedef enum {
HDMI_DMT_640x350_85 = 0x1, /**<640x350 */
HDMI_DMT_640x400_85 = 0x2, /**<640x400 */
HDMI_DMT_IBM_VGA_85 = 0x3, /**<720x400 */
HDMI_DMT_VGA_60 = 0x4, /**<640x480 (60Hz is same as VGA above) */
HDMI_DMT_VGA_72 = 0x5,
HDMI_DMT_VGA_75 = 0x6,
HDMI_DMT_VGA_85 = 0x7,
HDMI_DMT_SVGA_56 = 0x8, /**<800x600 */
HDMI_DMT_SVGA_60 = 0x9,
HDMI_DMT_SVGA_72 = 0xA,
HDMI_DMT_SVGA_75 = 0xB,
HDMI_DMT_SVGA_85 = 0xC,
HDMI_DMT_SVGA_120 = 0xD,
HDMI_DMT_848x480_60 = 0xE, /**<848x480 */
HDMI_DMT_XGA_43 = 0xF, /**<1024x768 - interlaced, DO NOT USE */
HDMI_DMT_XGA_60 = 0x10, /**<1024x768 */
HDMI_DMT_XGA_70 = 0x11,
HDMI_DMT_XGA_75 = 0x12,
HDMI_DMT_XGA_85 = 0x13,
HDMI_DMT_XGA_120 = 0x14,
HDMI_DMT_XGAP_75 = 0x15, /**<1152x864 */
HDMI_DMT_WXGA_RB = 0x16, /**<1280x768 reduced blanking */
HDMI_DMT_WXGA_60 = 0x17,
HDMI_DMT_WXGA_75 = 0x18,
HDMI_DMT_WXGA_85 = 0x19,
HDMI_DMT_WXGA_120 = 0x1A, /**<120Hz with reduced blanking */
HDMI_DMT_1280x800_RB = 0x1B, /**<1280x800 reduced blanking */
HDMI_DMT_1280x800_60 = 0x1C,
HDMI_DMT_1280x800_75 = 0x1D,
HDMI_DMT_1280x800_85 = 0x1E,
HDMI_DMT_1280x800_120 = 0x1F, /** reduced blanking */
HDMI_DMT_1280x960_60 = 0x20, /**<1280x960 */
HDMI_DMT_1280x960_85 = 0x21,
HDMI_DMT_1280x960_120 = 0x22, /** reduced blanking */
HDMI_DMT_SXGA_60 = 0x23, /**<1280x1024 */
HDMI_DMT_SXGA_75 = 0x24,
HDMI_DMT_SXGA_85 = 0x25,
HDMI_DMT_SXGA_120 = 0x26, /** reduced blanking */
HDMI_DMT_1360x768_60 = 0x27, /**<1360x768 */
HDMI_DMT_1360x768_120 = 0x28, /**<120 Hz with reduced blanking */
HDMI_DMT_SXGAP_RB = 0x29, /**<1400x1050 reduced blanking */
HDMI_DMT_SXGAP_60 = 0x2A,
HDMI_DMT_SXGAP_75 = 0x2B,
HDMI_DMT_SXGAP_85 = 0x2C,
HDMI_DMT_SXGAP_120 = 0x2D, /** reduced blanking */
HDMI_DMT_1440x900_RB = 0x2E, /**<1440x900 reduced blanking */
HDMI_DMT_1440x900_60 = 0x2F,
HDMI_DMT_1440x900_75 = 0x30,
HDMI_DMT_1440x900_85 = 0x31,
HDMI_DMT_1440x900_120 = 0x32, /** reduced blanking */
HDMI_DMT_UXGA_60 = 0x33, /**<1600x1200 60Hz */
HDMI_DMT_UXGA_65 = 0x34,
HDMI_DMT_UXGA_70 = 0x35,
HDMI_DMT_UXGA_75 = 0x36,
HDMI_DMT_UXGA_85 = 0x37,
HDMI_DMT_UXGA_120 = 0x38, /** reduced blanking */
HDMI_DMT_SWXGAP_RB = 0x39, /**<1680x1050 reduced blanking */
HDMI_DMT_SWXGAP_60 = 0x3A, /**<1680x1050 60Hz */
HDMI_DMT_SWXGAP_75 = 0x3B,
HDMI_DMT_SWXGAP_85 = 0x3C,
HDMI_DMT_SWXGAP_120 = 0x3D, /** reduced blanking */
HDMI_DMT_1792x1344_60 = 0x3E, /**<1792x1344 60Hz */
HDMI_DMT_1792x1344_75 = 0x3F, /**<1792x1344 75Hz */
HDMI_DMT_1792x1344_120 = 0x40, /** reduced blanking */
HDMI_DMT_1856x1392_60 = 0x41, /**<1856x1392 60Hz */
HDMI_DMT_1856x1392_75 = 0x42, /**<1856x1392 75Hz */
HDMI_DMT_1856x1392_120 = 0x43, /** reduced blanking */
HDMI_DMT_WUXGA_RB = 0x44, /**<1920x1200 reduced blanking */
HDMI_DMT_WUXGA_60 = 0x45, /**<1920x1200 60Hz */
HDMI_DMT_WUXGA_75 = 0x46, /**<1920x1200 75Hz */
HDMI_DMT_WUXGA_85 = 0x47, /**<1920x1200 85Hz */
HDMI_DMT_WUXGA_120 = 0x48, /** reduced blanking */
HDMI_DMT_1920x1440_60 = 0x49, /**<1920x1440 60Hz */
HDMI_DMT_1920x1440_75 = 0x4A, /**<1920x1440 75Hz */
HDMI_DMT_1920x1440_120 = 0x4B, /** reduced blanking */
HDMI_DMT_2560x1600_RB = 0x4C, /**<2560x1600 reduced blanking */
HDMI_DMT_2560x1600_60 = 0x4D, /**<2560x1600 60 Hz */
HDMI_DMT_2560x1600_75 = 0x4E, /**<2560x1600 75 Hz */
HDMI_DMT_2560x1600_85 = 0x4E, /**<2560x1600 85 Hz */
HDMI_DMT_2560x1600_120 = 0x50, /** reduced blanking */
HDMI_DMT_1366x768_60 = 0x51, /**<1366x768 60Hz */
HDMI_DMT_1080p_60 = 0x52, /**<Same as 1080p60 above */
HDMI_DMT_1600x900_RB = 0x53, /**<1600x900 reduced blanking */
HDMI_DMT_2048x1152_RB = 0x54, /**<2048x1152 reduced blanking */
HDMI_DMT_720p_60 = 0x55, /**<Same as 720p60 above */
HDMI_DMT_1366x768_RB = 0x56, /**<1366x768 reduced blanking */
//Up-to-date as of VESA DMT v1 r12
HDMI_DMT_OFF = 0xff
} HDMI_DMT_RES_CODE_T;
/**
* HDMI scanmode
*/
typedef enum {
HDMI_NONINTERLACED,
HDMI_INTERLACED
} HDMI_INTERLACED_T;
/**
* Preference for powering up HDMI using best mode
* Note we will only use CEA modes for matching
*/
typedef enum {
HDMI_MODE_MATCH_NONE = 0x0, /**<No mode*/
HDMI_MODE_MATCH_FRAMERATE = 0x1, /**<Match based on frame rate */
HDMI_MODE_MATCH_RESOLUTION = 0x2, /**<Match based on resolution */
HDMI_MODE_MATCH_SCANMODE = 0x4 /**<Match based on scan mode */
} EDID_MODE_MATCH_FLAG_T;
/**
* Audio support flags
*/
typedef enum {
EDID_AUDIO_NO_SUPPORT = (1 << 0), /**<No support for that format */
EDID_AUDIO_CHAN_UNSUPPORTED = (1 << 1), /**<max. no. of channels exceeded */
EDID_AUDIO_FS_UNSUPPORTED = (1 << 2), /**<no support for that sampling frequency */
EDID_AUDIO_BR_UNSUPPORTED = (1 << 3), /**<max. bitrate exceeded */
EDID_AUDIO_SAMP_UNSUPPORTED = (1 << 4), /**sample size unsupported (pcm only) */
} EDID_AUDIO_SUPPORT_FLAG_T;
/**
* Enums for audio support in audio descriptor block (CEA only)
* audio formats as specified in CEA Short Audio Descriptors
*/
typedef enum {
EDID_AudioFormat_eReserved, /**<Refer to header when set in audio info frame */
EDID_AudioFormat_ePCM, /**<Plain old PCM, mandatory for any audio support */
EDID_AudioFormat_eAC3, /**<AC3 */
EDID_AudioFormat_eMPEG1, /**<Mpeg layer 1 and 2 */
EDID_AudioFormat_eMP3, /**<Mpeg layer 3 */
EDID_AudioFormat_eMPEG2, /**<Mpeg 2 audio */
EDID_AudioFormat_eAAC, /**<AAC */
EDID_AudioFormat_eDTS, /**<DTS */
EDID_AudioFormat_eATRAC, /**<Sony proprietary */
EDID_AudioFormat_eDSD, /**<Super Audio CD 1-bit audio */
EDID_AudioFormat_eEAC3, /**<Dolby Digital + */
EDID_AudioFormat_eDTS_HD, /**<DTS-HD */
EDID_AudioFormat_eMLP, /**<Meridian Lossless Packing - for DVD audio */
EDID_AudioFormat_eDST, /**<Direct stream transfer - compressed super audio CD */
EDID_AudioFormat_eWMAPRO, /**<WMA Pro */
EDID_AudioFormat_eExtended, /**<Refer to byte 3 of audio db for coding extension type */
EDID_AudioFormat_eMaxCount
} EDID_AudioFormat;
/**
* If audio format is set to EDID_AudioFormat_eExtended,
* this gives the extended audio type (see CEA-861E section 6.6.1)
*/
typedef enum {
EDID_AudioCodingExtension_NONE = 0x0, /** no extension, for audio format != Extended */
EDID_AudioCodingExtension_HEAAC = 0x1, /**<HE-AAC */
EDID_AudioCodingExtension_HEAAC2 = 0x2, /**<HE-AAC v2 */
EDID_AudioCodingExtension_MPEGSUR = 0x3, /**<MPEG Surround */
EDID_AudioCodingExtension_max
} EDID_AudioCodingExtension;
/**
* Audio sample rates as specified in CEA Short Audio Descriptors
*/
typedef enum {
EDID_AudioSampleRate_eReferToHeader = 0x0, /**<Only used in audio infoframe */
EDID_AudioSampleRate_e32KHz = (1 << 0), /**<32 kHz (mandatory) */
EDID_AudioSampleRate_e44KHz = (1 << 1), /**<44.1 kHz (mandatory) */
EDID_AudioSampleRate_e48KHz = (1 << 2), /**<48kHz (mandatory) */
EDID_AudioSampleRate_e88KHz = (1 << 3), /**<88.2 kHz */
EDID_AudioSampleRate_e96KHz = (1 << 4), /**<96kHz */
EDID_AudioSampleRate_e176KHz = (1 << 5), /**<176.4 kHz */
EDID_AudioSampleRate_e192KHz = (1 << 6) /**<192 kHz */
} EDID_AudioSampleRate;
/**
* Audio sample sizes (L-PCM) as specified in CEA Short Audio Descriptors
*/
typedef enum {
EDID_AudioSampleSize_refertoheader = 0x0, /**<Only used in audio infoframe */
EDID_AudioSampleSize_16bit = 0x1, /**<16-bit samples (mandatory) */
EDID_AudioSampleSize_20bit = 0x2, /**<20-bit samples */
EDID_AudioSampleSize_24bit = 0x4 /**<24-bit samples */
} EDID_AudioSampleSize;
/**
* LFE feedback level as described in audio db
*/
typedef enum {
EDID_AudioLFEFB_UNKNOWN = 0x0, /**<Refer to other information */
EDID_AudioLFEFB_0dB = 0x1, /**<0dB - same level as other channels */
EDID_AudioLFEFB_10dB = 0x2 /**<+10dB relative to other channels */
} EDID_AudioLFEFB;
/**
* HDMI notifications (defined as a bit mask to be conveniently returned as a state),
* make sure this does not clash with the values in vc_sdtv.h
* SDTV notifications start at bit 16.
* These values are returned by the TV service in a callback.
*/
typedef enum {
VC_HDMI_UNPLUGGED = (1 << 0), /**<HDMI cable is detached */
VC_HDMI_STANDBY = (1 << 1), /**<HDMI cable is attached but not powered on */
VC_HDMI_DVI = (1 << 2), /**<HDMI is on but in DVI mode (no audio) */
VC_HDMI_HDMI = (1 << 3), /**<HDMI is on and HDMI mode is active */
VC_HDMI_HDCP_UNAUTH = (1 << 4), /**<HDCP authentication is broken (e.g. Ri mismatched) or not active */
VC_HDMI_HDCP_AUTH = (1 << 5), /**<HDCP is active */
VC_HDMI_HDCP_KEY_DOWNLOAD = (1 << 6), /**<HDCP key download successful/fail */
VC_HDMI_HDCP_SRM_DOWNLOAD = (1 << 7), /**<HDCP revocation list download successful/fail */
VC_HDMI_CHANGING_MODE = (1 << 8), /**<HDMI is starting to change mode, clock has not yet been set */
} VC_HDMI_NOTIFY_T;
]]
--[[
/**
* Callback reason and arguments from HDMI middleware
* Each callback comes with two optional uint32_t parameters.
* Reason param1 param2 remark
* VC_HDMI_UNPLUGGED - - cable is unplugged
* VC_HDMI_STANDBY CEA/DMT mode code cable is plugged in and peripheral powered off (preferred mode sent back if available)
* VC_HDMI_DVI CEA/DMT mode code DVI mode is active at said resolution
* VC_HDMI_HDMI CEA(3D)/DMT mode code HDMI mode is active at said resolution (in 3D mode if CEA3D)
* VC_HDMI_HDCP_UNAUTH HDCP_ERROR_T retry? HDCP is inactive, the error can be none if we actively disable HDCP, if retry is non-zero, HDCP will attempt to reauthenticate
* VC_HDMI_HDCP_AUTH - - HDCP is active
* VC_HDMI_HDCP_KEY_DOWNLOAD success? - HDCP key download success (zero) or not (non zero)
* VC_HDMI_HDCP_SRM_DOWNLOAD no. of keys - HDCP revocation list download set no. of keys (zero means failure)
* VC_HDMI_CHANGING_MODE 0 0 No information is supplied in this callback
*/
--]]
ffi.cdef[[
// Some constants which are required on host side
static const int HDCP_KEY_BLOCK_SIZE = 328; // KSV, padding, device keys and hash.
static const int HDCP_KSV_LENGTH = 5;
static const int HDCP_MAX_DEVICE = 127; // Max. number of HDCP downstream device supported
static const int HDCP_MAX_DEPTH = 7; // Max. number of levels HDCP 1.x can have
static const int EDID_BLOCKSIZE = 128;
static const int HDMI_NUM_PACKET_BYTES = 28; // Size of HDMI infoframes minus the header
]]
-- All CEC related constants now reside in vc_cec.h
ffi.cdef[[
/**
* General callback function for both HDMI and HDCP middleware
* reason is the notification nature
* param1 and param2 have different meanings depending on the notification (see above)
*
* @param client_p is the callback context
*
* @param reason is the callback reason
*
* @param param1 is the first callback argument (meaning as above)
*
* @param param2 is the second callback argument (meaning as above)
*
* @return void
*/
typedef void (*HDMI_CALLBACK_T)(void *client_p, VC_HDMI_NOTIFY_T reason, uint32_t param1, uint32_t param2);
//TV service error return code
typedef enum {
VC_HDMI_SUCCESS = 0, /** OK */
VC_HDMI_ERROR_FORMAT_UNSUPPORTED = 1, /** format not supported */
VC_HDMI_ERROR_INVALID_FORMAT = 2, /** invalid format */
VC_HDMI_ERROR_INVALID_PROPERTY = 3, /** invalid property */
VC_HDMI_ERROR_OUT_OF_RANGE = 4, /** invalid values passed to set property */
VC_HDMI_ERROR_INVALID_INFOFRAME = 5, /** invalid infoframe */
} VC_HDMI_ERROR_T;
//Defines for backward code compatibilty (these were originally in hdmi.h)
typedef VC_HDMI_ERROR_T HDMI_RESULT_T;
]]
HDMI_RESULT_SUCCESS = ffi.C.VC_HDMI_SUCCESS;
HDMI_RESULT_FAILED = ffi.C.VC_HDMI_ERROR_FORMAT_UNSUPPORTED;
HDMI_DISPLAY_OPTIONS_T = ffi.typeof("HDMI_DISPLAY_OPTIONS_T");
HDMI_SPD_DATA_T = ffi.typeof("HDMI_SPD_DATA_T");