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/******************************************************************************
*
* Copyright (C) 2015-2016 Cadence Design Systems, Inc.
* All rights reserved worldwide.
*
* Copyright 2017-2018 NXP
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 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
* NONINFRINGEMENT. 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.
*
******************************************************************************
*
* edid_parser.h
*
******************************************************************************
*/
#ifndef EDID_PARSER_H
#define EDID_PARSER_H
#define MAX_DESCRIPTOR_LENGTH 36
#define MAX_RANGE_LIMITS_VIDEO_TIMING_LENGTH 12
#define EDID_HEADER_LENGTH 8
#define EDID_LENGTH 128
typedef enum {
EDID_PARSER_SUCCESS,
EDID_PARSER_ERROR,
} EDID_PARSER_RESULT;
typedef enum {
DESCRIPTOR_TYPE_DTD,
DESCRIPTOR_TYPE_SERIAL_NUMBER,
DESCRIPTOR_TYPE_DATA_STRING,
DESCRIPTOR_TYPE_RANGE_LIMITS,
DESCRIPTOR_TYPE_PRODUCT_NAME,
DESCRIPTOR_TYPE_COLOR_POINT,
DESCRIPTOR_TYPE_STANDARD_TIMING,
DESCRIPTOR_TYPE_COLOR_MANAGEMENT,
DESCRIPTOR_TYPE_CVT_TIMING_CODES,
DESCRIPTOR_TYPE_ESTABLISHED_TIMINGS_3,
DESCRIPTOR_TYPE_DUMMY,
DESCRIPTOR_TYPE_MANUFACTURER_SPECIFIC
} EDID_DESCRIPTOR_TYPE;
typedef enum {
VIDEO_TIMING_DEFAULT_GTF,
VIDEO_TIMING_RANGE_LIMITS_ONLY,
VIDEO_TIMING_SECONDARY_GTF,
VIDEO_TIMING_CVT,
} RANGE_LIMITS_VIDEO_TIMING_TYPE;
/**
* \brief Common descriptor header structure
*/
typedef struct {
EDID_DESCRIPTOR_TYPE type;
unsigned char tag;
} S_DESCRIPTOR_HEADER_DATA;
/**
* \brief Detailed Timing Descriptor (DTD) structure
*/
typedef struct {
S_DESCRIPTOR_HEADER_DATA header;
unsigned short pixel_clock;
unsigned short horizontal_addressable_video;
unsigned short horizontal_blanking;
unsigned short vertical_addressable_video;
unsigned short vertical_blanking;
unsigned short horizontal_front_porch;
unsigned short horizontal_sync_pulse_width;
unsigned short vertical_front_porch;
unsigned short vertical_sync_pulse_width;
unsigned short horizontal_addressable_video_image_size;
unsigned short vertical_addressable_video_image_size;
unsigned char horizontal_border;
unsigned char vertical_border;
unsigned char signal_features;
} S_DTD_DATA;
/**
* \brief Serial Number Descriptor structure
*/
typedef struct {
S_DESCRIPTOR_HEADER_DATA header;
unsigned char serial_number[13];
} S_SERIAL_NUMBER_DATA;
/**
* \brief Data String Descriptor structure
*/
typedef struct {
S_DESCRIPTOR_HEADER_DATA header;
char data_string[13];
} S_DATA_STRING_DATA;
/**
* \brief Range Limits Descriptor structure
*/
typedef struct {
S_DESCRIPTOR_HEADER_DATA header;
unsigned char offset_flags;
unsigned char min_vertical_rate;
unsigned char max_vertical_rate;
unsigned char min_horizontal_rate;
unsigned char max_horizontal_rate;
unsigned char max_pixel_clock;
RANGE_LIMITS_VIDEO_TIMING_TYPE type;
unsigned char suport_flags[MAX_RANGE_LIMITS_VIDEO_TIMING_LENGTH];
} S_RANGE_LIMITS_DATA;
/**
* \brief Range Limits Secondary GTF Flags structure
*/
typedef struct {
unsigned char start_break_frequency;
unsigned char c;
unsigned short m;
unsigned char k;
unsigned char j;
} S_RANGE_LIMITS_VIDEO_TIMING_SECONDARY_GTF;
/**
* \brief Range Limits CVT Flags structure
*/
typedef struct {
unsigned char cvt_version;
unsigned char additional_pixel_clock_precision;
unsigned short max_active_pixels;
unsigned char supported_ar;
unsigned char preferred_ar;
unsigned char blanking_support;
unsigned char supported_scalling;
unsigned char preferred_vertical_refresh_rate;
} S_RANGE_LIMITS_VIDEO_TIMING_CVT;
/**
* \brief Product Name Descriptor structure
*/
typedef struct {
S_DESCRIPTOR_HEADER_DATA header;
char product_name[13];
} S_PRODUCT_NAME_DATA;
/**
* \brief Color point Descriptor structure
*/
typedef struct {
S_DESCRIPTOR_HEADER_DATA header;
unsigned char white_point_index_1;
unsigned short white_x_1;
unsigned short white_y_1;
unsigned char gamma_1;
unsigned char white_point_index_2;
unsigned short white_x_2;
unsigned short white_y_2;
unsigned char gamma_2;
} S_COLOR_POINT_DATA;
/**
* \brief Standard Timing Descriptor structure
*/
typedef struct {
S_DESCRIPTOR_HEADER_DATA header;
unsigned short standard_timings[6];
} S_STANDARD_TIMING_DATA;
/**
* \brief Color Management Descriptor structure
*/
typedef struct {
S_DESCRIPTOR_HEADER_DATA header;
unsigned char version;
unsigned short red_a3;
unsigned short red_a2;
unsigned short green_a3;
unsigned short green_a2;
unsigned short blue_a3;
unsigned short blue_a2;
} S_COLOR_MANAGEMENT_DATA;
/**
* \brief CVT 3 Byte Code Descriptor structure
*/
typedef struct {
S_DESCRIPTOR_HEADER_DATA header;
unsigned char version;
unsigned short addressable_lines[4];
unsigned char aspect_ratio[4];
unsigned char preferred_vertical_rate[4];
unsigned char supported_vertical_rate_and_blanking[4];
} S_CVT_TIMING_CODES_DATA;
/**
* \brief Established Timings 3 Descriptor structure
*/
typedef struct {
S_DESCRIPTOR_HEADER_DATA header;
unsigned char version;
unsigned char established_timings[6];
} S_ESTABLISHED_TIMINGS_3_DATA;
/**
* \brief Dummy Descriptor structure
*/
typedef struct {
S_DESCRIPTOR_HEADER_DATA header;
} S_DUMMY_DATA;
/**
* \brief Manufacturer Specific Descriptor structure
*/
typedef struct {
S_DESCRIPTOR_HEADER_DATA header;
unsigned char desc_data[18];
} S_MANUFACTURER_SPECIFIC_DATA;
/**
* \brief CEA-861 extension structure
*/
typedef struct {
unsigned char revision;
unsigned char underscan;
unsigned char audio;
} S_CEA861_DATA;
/**
* \brief Extended Display Identification Data (EDID) structure
*/
typedef struct {
unsigned char header[8];
char manufacturer_name[4];
unsigned short product_code;
unsigned int serial_number;
unsigned char week;
unsigned short year;
unsigned short edid_version;
unsigned char video_input_definition;
unsigned char horizontal_size;
unsigned char vertical_size;
unsigned char gamma;
unsigned char feature_support;
unsigned short chromacity_coorditates_red_x;
unsigned short chromacity_coorditates_red_y;
unsigned short chromacity_coorditates_green_x;
unsigned short chromacity_coorditates_green_y;
unsigned short chromacity_coorditates_blue_x;
unsigned short chromacity_coorditates_blue_y;
unsigned short chromacity_coorditates_white_x;
unsigned short chromacity_coorditates_white_y;
unsigned char established_timing_1;
unsigned char established_timing_2;
unsigned char manufacturer_timing;
unsigned short standard_timings[8];
unsigned char descriptors[4][MAX_DESCRIPTOR_LENGTH];
unsigned char extensions;
} S_EDID_DATA;
EDID_PARSER_RESULT edid_parse(S_EDID_DATA *edid, unsigned char *raw_data,
unsigned int len);
#endif /* EDID_PARSER_H */
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