include/edid.h - filogic/uboot - Gitiles

 /*
  * Copyright (c) 2012 The Chromium OS Authors.
  *
  * (C) Copyright 2010
  * Petr Stetiar <ynezz@true.cz>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  *
  * Contains stolen code from ddcprobe project which is:
  * Copyright (C) Nalin Dahyabhai <bigfun@pobox.com>
  */

 #ifndef __EDID_H_
 #define __EDID_H_

 #include <linux/types.h>

 #define GET_BIT(_x, _pos) \
 	(((_x) >> (_pos)) & 1)
 #define GET_BITS(_x, _pos_msb, _pos_lsb) \
 	(((_x) >> (_pos_lsb)) & ((1 << ((_pos_msb) - (_pos_lsb) + 1)) - 1))

 /* Aspect ratios used in EDID info. */
 enum edid_aspect {
 	ASPECT_625 = 0,
 	ASPECT_75,
 	ASPECT_8,
 	ASPECT_5625,
 };

 /* Detailed timing information used in EDID v1.x */
 struct edid_detailed_timing {
 	unsigned char pixel_clock[2];
 #define EDID_DETAILED_TIMING_PIXEL_CLOCK(_x) \
 	(((((uint32_t)(_x).pixel_clock[1]) << 8) + \
 	 (_x).pixel_clock[0]) * 10000)
 	unsigned char horizontal_active;
 	unsigned char horizontal_blanking;
 	unsigned char horizontal_active_blanking_hi;
 #define EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(_x) \
 	((GET_BITS((_x).horizontal_active_blanking_hi, 7, 4) << 8) + \
 	 (_x).horizontal_active)
 #define EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(_x) \
 	((GET_BITS((_x).horizontal_active_blanking_hi, 3, 0) << 8) + \
 	 (_x).horizontal_blanking)
 	unsigned char vertical_active;
 	unsigned char vertical_blanking;
 	unsigned char vertical_active_blanking_hi;
 #define EDID_DETAILED_TIMING_VERTICAL_ACTIVE(_x) \
 	((GET_BITS((_x).vertical_active_blanking_hi, 7, 4) << 8) + \
 	 (_x).vertical_active)
 #define EDID_DETAILED_TIMING_VERTICAL_BLANKING(_x) \
 	((GET_BITS((_x).vertical_active_blanking_hi, 3, 0) << 8) + \
 	 (_x).vertical_blanking)
 	unsigned char hsync_offset;
 	unsigned char hsync_pulse_width;
 	unsigned char vsync_offset_pulse_width;
 	unsigned char hsync_vsync_offset_pulse_width_hi;
 #define EDID_DETAILED_TIMING_HSYNC_OFFSET(_x) \
 	((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 7, 6) << 8) + \
 	 (_x).hsync_offset)
 #define EDID_DETAILED_TIMING_HSYNC_PULSE_WIDTH(_x) \
 	((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 5, 4) << 8) + \
 	 (_x).hsync_pulse_width)
 #define EDID_DETAILED_TIMING_VSYNC_OFFSET(_x) \
 	((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 3, 2) << 4) + \
 	 GET_BITS((_x).vsync_offset_pulse_width, 7, 4))
 #define EDID_DETAILED_TIMING_VSYNC_PULSE_WIDTH(_x) \
 	((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 1, 0) << 4) + \
 	 GET_BITS((_x).vsync_offset_pulse_width, 3, 0))
 	unsigned char himage_size;
 	unsigned char vimage_size;
 	unsigned char himage_vimage_size_hi;
 #define EDID_DETAILED_TIMING_HIMAGE_SIZE(_x) \
 	((GET_BITS((_x).himage_vimage_size_hi, 7, 4) << 8) + (_x).himage_size)
 #define EDID_DETAILED_TIMING_VIMAGE_SIZE(_x) \
 	((GET_BITS((_x).himage_vimage_size_hi, 3, 0) << 8) + (_x).vimage_size)
 	unsigned char hborder;
 	unsigned char vborder;
 	unsigned char flags;
 #define EDID_DETAILED_TIMING_FLAG_INTERLACED(_x) \
 	GET_BIT((_x).flags, 7)
 #define EDID_DETAILED_TIMING_FLAG_STEREO(_x) \
 	GET_BITS((_x).flags, 6, 5)
 #define EDID_DETAILED_TIMING_FLAG_DIGITAL_COMPOSITE(_x) \
 	GET_BITS((_x).flags, 4, 3)
 #define EDID_DETAILED_TIMING_FLAG_POLARITY(_x) \
 	GET_BITS((_x).flags, 2, 1)
 #define EDID_DETAILED_TIMING_FLAG_VSYNC_POLARITY(_x) \
 	GET_BIT((_x).flags, 2)
 #define EDID_DETAILED_TIMING_FLAG_HSYNC_POLARITY(_x) \
 	GET_BIT((_x).flags, 1)
 #define EDID_DETAILED_TIMING_FLAG_INTERLEAVED(_x) \
 	GET_BIT((_x).flags, 0)
 } __attribute__ ((__packed__));

 enum edid_monitor_descriptor_types {
 	EDID_MONITOR_DESCRIPTOR_SERIAL = 0xff,
 	EDID_MONITOR_DESCRIPTOR_ASCII = 0xfe,
 	EDID_MONITOR_DESCRIPTOR_RANGE = 0xfd,
 	EDID_MONITOR_DESCRIPTOR_NAME = 0xfc,
 };

 struct edid_monitor_descriptor {
 	uint16_t zero_flag_1;
 	unsigned char zero_flag_2;
 	unsigned char type;
 	unsigned char zero_flag_3;
 	union {
 		char string[13];
 		struct {
 			unsigned char vertical_min;
 			unsigned char vertical_max;
 			unsigned char horizontal_min;
 			unsigned char horizontal_max;
 			unsigned char pixel_clock_max;
 			unsigned char gtf_data[8];
 		} range_data;
 	} data;
 } __attribute__ ((__packed__));

 struct edid1_info {
 	unsigned char header[8];
 	unsigned char manufacturer_name[2];
 #define EDID1_INFO_MANUFACTURER_NAME_ZERO(_x) \
 	GET_BIT(((_x).manufacturer_name[0]), 7)
 #define EDID1_INFO_MANUFACTURER_NAME_CHAR1(_x) \
 	GET_BITS(((_x).manufacturer_name[0]), 6, 2)
 #define EDID1_INFO_MANUFACTURER_NAME_CHAR2(_x) \
 	((GET_BITS(((_x).manufacturer_name[0]), 1, 0) << 3) + \
 	 GET_BITS(((_x).manufacturer_name[1]), 7, 5))
 #define EDID1_INFO_MANUFACTURER_NAME_CHAR3(_x) \
 	GET_BITS(((_x).manufacturer_name[1]), 4, 0)
 	unsigned char product_code[2];
 #define EDID1_INFO_PRODUCT_CODE(_x) \
 	(((uint16_t)(_x).product_code[1] << 8) + (_x).product_code[0])
 	unsigned char serial_number[4];
 #define EDID1_INFO_SERIAL_NUMBER(_x) \
 	(((uint32_t)(_x).serial_number[3] << 24) + \
 	 ((_x).serial_number[2] << 16) + ((_x).serial_number[1] << 8) + \
 	 (_x).serial_number[0])
 	unsigned char week;
 	unsigned char year;
 	unsigned char version;
 	unsigned char revision;
 	unsigned char video_input_definition;
 #define EDID1_INFO_VIDEO_INPUT_DIGITAL(_x) \
 	GET_BIT(((_x).video_input_definition), 7)
 #define EDID1_INFO_VIDEO_INPUT_VOLTAGE_LEVEL(_x) \
 	GET_BITS(((_x).video_input_definition), 6, 5)
 #define EDID1_INFO_VIDEO_INPUT_BLANK_TO_BLACK(_x) \
 	GET_BIT(((_x).video_input_definition), 4)
 #define EDID1_INFO_VIDEO_INPUT_SEPARATE_SYNC(_x) \
 	GET_BIT(((_x).video_input_definition), 3)
 #define EDID1_INFO_VIDEO_INPUT_COMPOSITE_SYNC(_x) \
 	GET_BIT(((_x).video_input_definition), 2)
 #define EDID1_INFO_VIDEO_INPUT_SYNC_ON_GREEN(_x) \
 	GET_BIT(((_x).video_input_definition), 1)
 #define EDID1_INFO_VIDEO_INPUT_SERRATION_V(_x) \
 	GET_BIT(((_x).video_input_definition), 0)
 	unsigned char max_size_horizontal;
 	unsigned char max_size_vertical;
 	unsigned char gamma;
 	unsigned char feature_support;
 #define EDID1_INFO_FEATURE_STANDBY(_x) \
 	GET_BIT(((_x).feature_support), 7)
 #define EDID1_INFO_FEATURE_SUSPEND(_x) \
 	GET_BIT(((_x).feature_support), 6)
 #define EDID1_INFO_FEATURE_ACTIVE_OFF(_x) \
 	GET_BIT(((_x).feature_support), 5)
 #define EDID1_INFO_FEATURE_DISPLAY_TYPE(_x) \
 	GET_BITS(((_x).feature_support), 4, 3)
 #define EDID1_INFO_FEATURE_RGB(_x) \
 	GET_BIT(((_x).feature_support), 2)
 #define EDID1_INFO_FEATURE_PREFERRED_TIMING_MODE(_x) \
 	GET_BIT(((_x).feature_support), 1)
 #define EDID1_INFO_FEATURE_DEFAULT_GTF_SUPPORT(_x) \
 	GET_BIT(((_x).feature_support), 0)
 	unsigned char color_characteristics[10];
 	unsigned char established_timings[3];
 #define EDID1_INFO_ESTABLISHED_TIMING_720X400_70(_x) \
 	GET_BIT(((_x).established_timings[0]), 7)
 #define EDID1_INFO_ESTABLISHED_TIMING_720X400_88(_x) \
 	GET_BIT(((_x).established_timings[0]), 6)
 #define EDID1_INFO_ESTABLISHED_TIMING_640X480_60(_x) \
 	GET_BIT(((_x).established_timings[0]), 5)
 #define EDID1_INFO_ESTABLISHED_TIMING_640X480_67(_x) \
 	GET_BIT(((_x).established_timings[0]), 4)
 #define EDID1_INFO_ESTABLISHED_TIMING_640X480_72(_x) \
 	GET_BIT(((_x).established_timings[0]), 3)
 #define EDID1_INFO_ESTABLISHED_TIMING_640X480_75(_x) \
 	GET_BIT(((_x).established_timings[0]), 2)
 #define EDID1_INFO_ESTABLISHED_TIMING_800X600_56(_x) \
 	GET_BIT(((_x).established_timings[0]), 1)
 #define EDID1_INFO_ESTABLISHED_TIMING_800X600_60(_x) \
 	GET_BIT(((_x).established_timings[0]), 0)
 #define EDID1_INFO_ESTABLISHED_TIMING_800X600_72(_x) \
 	GET_BIT(((_x).established_timings[1]), 7)
 #define EDID1_INFO_ESTABLISHED_TIMING_800X600_75(_x) \
 	GET_BIT(((_x).established_timings[1]), 6)
 #define EDID1_INFO_ESTABLISHED_TIMING_832X624_75(_x) \
 	GET_BIT(((_x).established_timings[1]), 5)
 #define EDID1_INFO_ESTABLISHED_TIMING_1024X768_87I(_x) \
 	GET_BIT(((_x).established_timings[1]), 4)
 #define EDID1_INFO_ESTABLISHED_TIMING_1024X768_60(_x) \
 	GET_BIT(((_x).established_timings[1]), 3)
 #define EDID1_INFO_ESTABLISHED_TIMING_1024X768_70(_x) \
 	GET_BIT(((_x).established_timings[1]), 2)
 #define EDID1_INFO_ESTABLISHED_TIMING_1024X768_75(_x) \
 	GET_BIT(((_x).established_timings[1]), 1)
 #define EDID1_INFO_ESTABLISHED_TIMING_1280X1024_75(_x) \
 	GET_BIT(((_x).established_timings[1]), 0)
 #define EDID1_INFO_ESTABLISHED_TIMING_1152X870_75(_x) \
 	GET_BIT(((_x).established_timings[2]), 7)
 	struct {
 		unsigned char xresolution;
 		unsigned char aspect_vfreq;
 	} __attribute__((__packed__)) standard_timings[8];
 #define EDID1_INFO_STANDARD_TIMING_XRESOLUTION(_x, _i) \
 	(((_x).standard_timings[_i]).xresolution)
 #define EDID1_INFO_STANDARD_TIMING_ASPECT(_x, _i) \
 	GET_BITS(((_x).standard_timings[_i].aspect_vfreq), 7, 6)
 #define EDID1_INFO_STANDARD_TIMING_VFREQ(_x, _i) \
 	GET_BITS(((_x).standard_timings[_i].aspect_vfreq), 5, 0)
 	union {
 		unsigned char timing[72];
 		struct edid_monitor_descriptor descriptor[4];
 	} monitor_details;
 	unsigned char extension_flag;
 	unsigned char checksum;
 } __attribute__ ((__packed__));

 /**
  * Print the EDID info.
  *
  * @param edid_info	The EDID info to be printed
  */
 void edid_print_info(struct edid1_info *edid_info);

 /**
  * Check the EDID info.
  *
  * @param info  The EDID info to be checked
  * @return 0 on valid, or -1 on invalid
  */
 int edid_check_info(struct edid1_info *info);

 /**
  * Get the horizontal and vertical rate ranges of the monitor.
  *
  * @param edid	The EDID info
  * @param hmin	Returns the minimum horizontal rate
  * @param hmax	Returns the maxium horizontal rate
  * @param vmin	Returns the minimum vertical rate
  * @param vmax	Returns the maxium vertical rate
  * @return 0 on success, or -1 on error
  */
 int edid_get_ranges(struct edid1_info *edid, unsigned int *hmin,
 		    unsigned int *hmax, unsigned int *vmin,
 		    unsigned int *vmax);

 #endif /* __EDID_H_ */
	/*
	* Copyright (c) 2012 The Chromium OS Authors.
	*
	* (C) Copyright 2010
	* Petr Stetiar <ynezz@true.cz>
	*
	* SPDX-License-Identifier: GPL-2.0+
	*
	* Contains stolen code from ddcprobe project which is:
	* Copyright (C) Nalin Dahyabhai <bigfun@pobox.com>
	*/

	#ifndef __EDID_H_
	#define __EDID_H_

	#include <linux/types.h>

	#define GET_BIT(_x, _pos) \
	(((_x) >> (_pos)) & 1)
	#define GET_BITS(_x, _pos_msb, _pos_lsb) \
	(((_x) >> (_pos_lsb)) & ((1 << ((_pos_msb) - (_pos_lsb) + 1)) - 1))

	/* Aspect ratios used in EDID info. */
	enum edid_aspect {
	ASPECT_625 = 0,
	ASPECT_75,
	ASPECT_8,
	ASPECT_5625,
	};

	/* Detailed timing information used in EDID v1.x */
	struct edid_detailed_timing {
	unsigned char pixel_clock[2];
	#define EDID_DETAILED_TIMING_PIXEL_CLOCK(_x) \
	(((((uint32_t)(_x).pixel_clock[1]) << 8) + \
	(_x).pixel_clock[0]) * 10000)
	unsigned char horizontal_active;
	unsigned char horizontal_blanking;
	unsigned char horizontal_active_blanking_hi;
	#define EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(_x) \
	((GET_BITS((_x).horizontal_active_blanking_hi, 7, 4) << 8) + \
	(_x).horizontal_active)
	#define EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(_x) \
	((GET_BITS((_x).horizontal_active_blanking_hi, 3, 0) << 8) + \
	(_x).horizontal_blanking)
	unsigned char vertical_active;
	unsigned char vertical_blanking;
	unsigned char vertical_active_blanking_hi;
	#define EDID_DETAILED_TIMING_VERTICAL_ACTIVE(_x) \
	((GET_BITS((_x).vertical_active_blanking_hi, 7, 4) << 8) + \
	(_x).vertical_active)
	#define EDID_DETAILED_TIMING_VERTICAL_BLANKING(_x) \
	((GET_BITS((_x).vertical_active_blanking_hi, 3, 0) << 8) + \
	(_x).vertical_blanking)
	unsigned char hsync_offset;
	unsigned char hsync_pulse_width;
	unsigned char vsync_offset_pulse_width;
	unsigned char hsync_vsync_offset_pulse_width_hi;
	#define EDID_DETAILED_TIMING_HSYNC_OFFSET(_x) \
	((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 7, 6) << 8) + \
	(_x).hsync_offset)
	#define EDID_DETAILED_TIMING_HSYNC_PULSE_WIDTH(_x) \
	((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 5, 4) << 8) + \
	(_x).hsync_pulse_width)
	#define EDID_DETAILED_TIMING_VSYNC_OFFSET(_x) \
	((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 3, 2) << 4) + \
	GET_BITS((_x).vsync_offset_pulse_width, 7, 4))
	#define EDID_DETAILED_TIMING_VSYNC_PULSE_WIDTH(_x) \
	((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 1, 0) << 4) + \
	GET_BITS((_x).vsync_offset_pulse_width, 3, 0))
	unsigned char himage_size;
	unsigned char vimage_size;
	unsigned char himage_vimage_size_hi;
	#define EDID_DETAILED_TIMING_HIMAGE_SIZE(_x) \
	((GET_BITS((_x).himage_vimage_size_hi, 7, 4) << 8) + (_x).himage_size)
	#define EDID_DETAILED_TIMING_VIMAGE_SIZE(_x) \
	((GET_BITS((_x).himage_vimage_size_hi, 3, 0) << 8) + (_x).vimage_size)
	unsigned char hborder;
	unsigned char vborder;
	unsigned char flags;
	#define EDID_DETAILED_TIMING_FLAG_INTERLACED(_x) \
	GET_BIT((_x).flags, 7)
	#define EDID_DETAILED_TIMING_FLAG_STEREO(_x) \
	GET_BITS((_x).flags, 6, 5)
	#define EDID_DETAILED_TIMING_FLAG_DIGITAL_COMPOSITE(_x) \
	GET_BITS((_x).flags, 4, 3)
	#define EDID_DETAILED_TIMING_FLAG_POLARITY(_x) \
	GET_BITS((_x).flags, 2, 1)
	#define EDID_DETAILED_TIMING_FLAG_VSYNC_POLARITY(_x) \
	GET_BIT((_x).flags, 2)
	#define EDID_DETAILED_TIMING_FLAG_HSYNC_POLARITY(_x) \
	GET_BIT((_x).flags, 1)
	#define EDID_DETAILED_TIMING_FLAG_INTERLEAVED(_x) \
	GET_BIT((_x).flags, 0)
	} __attribute__ ((__packed__));

	enum edid_monitor_descriptor_types {
	EDID_MONITOR_DESCRIPTOR_SERIAL = 0xff,
	EDID_MONITOR_DESCRIPTOR_ASCII = 0xfe,
	EDID_MONITOR_DESCRIPTOR_RANGE = 0xfd,
	EDID_MONITOR_DESCRIPTOR_NAME = 0xfc,
	};

	struct edid_monitor_descriptor {
	uint16_t zero_flag_1;
	unsigned char zero_flag_2;
	unsigned char type;
	unsigned char zero_flag_3;
	union {
	char string[13];
	struct {
	unsigned char vertical_min;
	unsigned char vertical_max;
	unsigned char horizontal_min;
	unsigned char horizontal_max;
	unsigned char pixel_clock_max;
	unsigned char gtf_data[8];
	} range_data;
	} data;
	} __attribute__ ((__packed__));

	struct edid1_info {
	unsigned char header[8];
	unsigned char manufacturer_name[2];
	#define EDID1_INFO_MANUFACTURER_NAME_ZERO(_x) \
	GET_BIT(((_x).manufacturer_name[0]), 7)
	#define EDID1_INFO_MANUFACTURER_NAME_CHAR1(_x) \
	GET_BITS(((_x).manufacturer_name[0]), 6, 2)
	#define EDID1_INFO_MANUFACTURER_NAME_CHAR2(_x) \
	((GET_BITS(((_x).manufacturer_name[0]), 1, 0) << 3) + \
	GET_BITS(((_x).manufacturer_name[1]), 7, 5))
	#define EDID1_INFO_MANUFACTURER_NAME_CHAR3(_x) \
	GET_BITS(((_x).manufacturer_name[1]), 4, 0)
	unsigned char product_code[2];
	#define EDID1_INFO_PRODUCT_CODE(_x) \
	(((uint16_t)(_x).product_code[1] << 8) + (_x).product_code[0])
	unsigned char serial_number[4];
	#define EDID1_INFO_SERIAL_NUMBER(_x) \
	(((uint32_t)(_x).serial_number[3] << 24) + \
	((_x).serial_number[2] << 16) + ((_x).serial_number[1] << 8) + \
	(_x).serial_number[0])
	unsigned char week;
	unsigned char year;
	unsigned char version;
	unsigned char revision;
	unsigned char video_input_definition;
	#define EDID1_INFO_VIDEO_INPUT_DIGITAL(_x) \
	GET_BIT(((_x).video_input_definition), 7)
	#define EDID1_INFO_VIDEO_INPUT_VOLTAGE_LEVEL(_x) \
	GET_BITS(((_x).video_input_definition), 6, 5)
	#define EDID1_INFO_VIDEO_INPUT_BLANK_TO_BLACK(_x) \
	GET_BIT(((_x).video_input_definition), 4)
	#define EDID1_INFO_VIDEO_INPUT_SEPARATE_SYNC(_x) \
	GET_BIT(((_x).video_input_definition), 3)
	#define EDID1_INFO_VIDEO_INPUT_COMPOSITE_SYNC(_x) \
	GET_BIT(((_x).video_input_definition), 2)
	#define EDID1_INFO_VIDEO_INPUT_SYNC_ON_GREEN(_x) \
	GET_BIT(((_x).video_input_definition), 1)
	#define EDID1_INFO_VIDEO_INPUT_SERRATION_V(_x) \
	GET_BIT(((_x).video_input_definition), 0)
	unsigned char max_size_horizontal;
	unsigned char max_size_vertical;
	unsigned char gamma;
	unsigned char feature_support;
	#define EDID1_INFO_FEATURE_STANDBY(_x) \
	GET_BIT(((_x).feature_support), 7)
	#define EDID1_INFO_FEATURE_SUSPEND(_x) \
	GET_BIT(((_x).feature_support), 6)
	#define EDID1_INFO_FEATURE_ACTIVE_OFF(_x) \
	GET_BIT(((_x).feature_support), 5)
	#define EDID1_INFO_FEATURE_DISPLAY_TYPE(_x) \
	GET_BITS(((_x).feature_support), 4, 3)
	#define EDID1_INFO_FEATURE_RGB(_x) \
	GET_BIT(((_x).feature_support), 2)
	#define EDID1_INFO_FEATURE_PREFERRED_TIMING_MODE(_x) \
	GET_BIT(((_x).feature_support), 1)
	#define EDID1_INFO_FEATURE_DEFAULT_GTF_SUPPORT(_x) \
	GET_BIT(((_x).feature_support), 0)
	unsigned char color_characteristics[10];
	unsigned char established_timings[3];
	#define EDID1_INFO_ESTABLISHED_TIMING_720X400_70(_x) \
	GET_BIT(((_x).established_timings[0]), 7)
	#define EDID1_INFO_ESTABLISHED_TIMING_720X400_88(_x) \
	GET_BIT(((_x).established_timings[0]), 6)
	#define EDID1_INFO_ESTABLISHED_TIMING_640X480_60(_x) \
	GET_BIT(((_x).established_timings[0]), 5)
	#define EDID1_INFO_ESTABLISHED_TIMING_640X480_67(_x) \
	GET_BIT(((_x).established_timings[0]), 4)
	#define EDID1_INFO_ESTABLISHED_TIMING_640X480_72(_x) \
	GET_BIT(((_x).established_timings[0]), 3)
	#define EDID1_INFO_ESTABLISHED_TIMING_640X480_75(_x) \
	GET_BIT(((_x).established_timings[0]), 2)
	#define EDID1_INFO_ESTABLISHED_TIMING_800X600_56(_x) \
	GET_BIT(((_x).established_timings[0]), 1)
	#define EDID1_INFO_ESTABLISHED_TIMING_800X600_60(_x) \
	GET_BIT(((_x).established_timings[0]), 0)
	#define EDID1_INFO_ESTABLISHED_TIMING_800X600_72(_x) \
	GET_BIT(((_x).established_timings[1]), 7)
	#define EDID1_INFO_ESTABLISHED_TIMING_800X600_75(_x) \
	GET_BIT(((_x).established_timings[1]), 6)
	#define EDID1_INFO_ESTABLISHED_TIMING_832X624_75(_x) \
	GET_BIT(((_x).established_timings[1]), 5)
	#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_87I(_x) \
	GET_BIT(((_x).established_timings[1]), 4)
	#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_60(_x) \
	GET_BIT(((_x).established_timings[1]), 3)
	#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_70(_x) \
	GET_BIT(((_x).established_timings[1]), 2)
	#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_75(_x) \
	GET_BIT(((_x).established_timings[1]), 1)
	#define EDID1_INFO_ESTABLISHED_TIMING_1280X1024_75(_x) \
	GET_BIT(((_x).established_timings[1]), 0)
	#define EDID1_INFO_ESTABLISHED_TIMING_1152X870_75(_x) \
	GET_BIT(((_x).established_timings[2]), 7)
	struct {
	unsigned char xresolution;
	unsigned char aspect_vfreq;
	} __attribute__((__packed__)) standard_timings[8];
	#define EDID1_INFO_STANDARD_TIMING_XRESOLUTION(_x, _i) \
	(((_x).standard_timings[_i]).xresolution)
	#define EDID1_INFO_STANDARD_TIMING_ASPECT(_x, _i) \
	GET_BITS(((_x).standard_timings[_i].aspect_vfreq), 7, 6)
	#define EDID1_INFO_STANDARD_TIMING_VFREQ(_x, _i) \
	GET_BITS(((_x).standard_timings[_i].aspect_vfreq), 5, 0)
	union {
	unsigned char timing[72];
	struct edid_monitor_descriptor descriptor[4];
	} monitor_details;
	unsigned char extension_flag;
	unsigned char checksum;
	} __attribute__ ((__packed__));

	/**
	* Print the EDID info.
	*
	* @param edid_info The EDID info to be printed
	*/
	void edid_print_info(struct edid1_info *edid_info);

	/**
	* Check the EDID info.
	*
	* @param info The EDID info to be checked
	* @return 0 on valid, or -1 on invalid
	*/
	int edid_check_info(struct edid1_info *info);

	/**
	* Get the horizontal and vertical rate ranges of the monitor.
	*
	* @param edid The EDID info
	* @param hmin Returns the minimum horizontal rate
	* @param hmax Returns the maxium horizontal rate
	* @param vmin Returns the minimum vertical rate
	* @param vmax Returns the maxium vertical rate
	* @return 0 on success, or -1 on error
	*/
	int edid_get_ranges(struct edid1_info edid, unsigned int hmin,
	unsigned int hmax, unsigned int vmin,
	unsigned int *vmax);

	#endif /* __EDID_H_ */