[people/ms/u-boot.git] / include / 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>

/* Size of the EDID data */
#define EDID_SIZE	128
#define EDID_EXT_SIZE	256

/* OUI of HDMI vendor specific data block */
#define HDMI_IEEE_OUI 0x000c03

#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__));

enum edid_cea861_db_types {
	EDID_CEA861_DB_AUDIO = 0x01,
	EDID_CEA861_DB_VIDEO = 0x02,
	EDID_CEA861_DB_VENDOR = 0x03,
	EDID_CEA861_DB_SPEAKER = 0x04,
};

struct edid_cea861_info {
	unsigned char extension_tag;
#define EDID_CEA861_EXTENSION_TAG	0x02
	unsigned char revision;
	unsigned char dtd_offset;
	unsigned char dtd_count;
#define EDID_CEA861_SUPPORTS_UNDERSCAN(_x) \
	GET_BIT(((_x).dtd_count), 7)
#define EDID_CEA861_SUPPORTS_BASIC_AUDIO(_x) \
	GET_BIT(((_x).dtd_count), 6)
#define EDID_CEA861_SUPPORTS_YUV444(_x) \
	GET_BIT(((_x).dtd_count), 5)
#define EDID_CEA861_SUPPORTS_YUV422(_x) \
	GET_BIT(((_x).dtd_count), 4)
#define EDID_CEA861_DTD_COUNT(_x) \
	GET_BITS(((_x).dtd_count), 3, 0)
	unsigned char data[124];
#define EDID_CEA861_DB_TYPE(_x, offset) \
	GET_BITS((_x).data[offset], 7, 5)
#define EDID_CEA861_DB_LEN(_x, offset) \
	GET_BITS((_x).data[offset], 4, 0)
} __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);

/**
 * Check checksum of a 128 bytes EDID data block
 *
 * @param edid_block	EDID block data
 *
 * @return 0 on success, or a negative errno on error
 */
int edid_check_checksum(u8 *edid_block);

/**
 * 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);

struct display_timing;

/**
 * edid_get_timing() - Get basic digital display parameters
 *
 * @param buf		Buffer containing EDID data
 * @param buf_size	Size of buffer in bytes
 * @param timing	Place to put preferring timing information
 * @param panel_bits_per_colourp	Place to put the number of bits per
 *			colour supported by the panel. This will be set to
 *			-1 if not available
 * @return 0 if timings are OK, -ve on error
 */
int edid_get_timing(u8 *buf, int buf_size, struct display_timing *timing,
		    int *panel_bits_per_colourp);

#endif /* __EDID_H_ */
Commit	Line	Data
d46b5f7d TWHT	1	/*
	2	* Copyright (c) 2012 The Chromium OS Authors.
	3	*
	4	* (C) Copyright 2010
	5	* Petr Stetiar <ynezz@true.cz>
	6	*
1a459660	7	* SPDX-License-Identifier: GPL-2.0+
d46b5f7d TWHT	8	*
	9	* Contains stolen code from ddcprobe project which is:
	10	* Copyright (C) Nalin Dahyabhai <bigfun@pobox.com>
d46b5f7d TWHT	11	*/
	12
	13	#ifndef __EDID_H_
	14	#define __EDID_H_
	15
	16	#include <linux/types.h>
	17
00cf1167 SG	18	/* Size of the EDID data */
00cf1167 SG	19	#define EDID_SIZE 128
2dcf1433	20	#define EDID_EXT_SIZE 256
00cf1167	21
43c6bdd0 JS	22	/* OUI of HDMI vendor specific data block */
	23	#define HDMI_IEEE_OUI 0x000c03
	24
d46b5f7d TWHT	25	#define GET_BIT(_x, _pos) \
	26	(((_x) >> (_pos)) & 1)
	27	#define GET_BITS(_x, _pos_msb, _pos_lsb) \
	28	(((_x) >> (_pos_lsb)) & ((1 << ((_pos_msb) - (_pos_lsb) + 1)) - 1))
	29
	30	/* Aspect ratios used in EDID info. */
	31	enum edid_aspect {
	32	ASPECT_625 = 0,
	33	ASPECT_75,
	34	ASPECT_8,
	35	ASPECT_5625,
	36	};
	37
	38	/* Detailed timing information used in EDID v1.x */
	39	struct edid_detailed_timing {
	40	unsigned char pixel_clock[2];
	41	#define EDID_DETAILED_TIMING_PIXEL_CLOCK(_x) \
	42	(((((uint32_t)(_x).pixel_clock[1]) << 8) + \
	43	(_x).pixel_clock[0]) * 10000)
	44	unsigned char horizontal_active;
	45	unsigned char horizontal_blanking;
	46	unsigned char horizontal_active_blanking_hi;
	47	#define EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(_x) \
	48	((GET_BITS((_x).horizontal_active_blanking_hi, 7, 4) << 8) + \
	49	(_x).horizontal_active)
	50	#define EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(_x) \
	51	((GET_BITS((_x).horizontal_active_blanking_hi, 3, 0) << 8) + \
	52	(_x).horizontal_blanking)
	53	unsigned char vertical_active;
	54	unsigned char vertical_blanking;
	55	unsigned char vertical_active_blanking_hi;
	56	#define EDID_DETAILED_TIMING_VERTICAL_ACTIVE(_x) \
	57	((GET_BITS((_x).vertical_active_blanking_hi, 7, 4) << 8) + \
	58	(_x).vertical_active)
	59	#define EDID_DETAILED_TIMING_VERTICAL_BLANKING(_x) \
	60	((GET_BITS((_x).vertical_active_blanking_hi, 3, 0) << 8) + \
	61	(_x).vertical_blanking)
	62	unsigned char hsync_offset;
	63	unsigned char hsync_pulse_width;
1dc793dd	64	unsigned char vsync_offset_pulse_width;
d46b5f7d TWHT	65	unsigned char hsync_vsync_offset_pulse_width_hi;
	66	#define EDID_DETAILED_TIMING_HSYNC_OFFSET(_x) \
	67	((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 7, 6) << 8) + \
	68	(_x).hsync_offset)
	69	#define EDID_DETAILED_TIMING_HSYNC_PULSE_WIDTH(_x) \
	70	((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 5, 4) << 8) + \
	71	(_x).hsync_pulse_width)
	72	#define EDID_DETAILED_TIMING_VSYNC_OFFSET(_x) \
	73	((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 3, 2) << 4) + \
	74	GET_BITS((_x).vsync_offset_pulse_width, 7, 4))
	75	#define EDID_DETAILED_TIMING_VSYNC_PULSE_WIDTH(_x) \
	76	((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 1, 0) << 4) + \
	77	GET_BITS((_x).vsync_offset_pulse_width, 3, 0))
	78	unsigned char himage_size;
	79	unsigned char vimage_size;
	80	unsigned char himage_vimage_size_hi;
	81	#define EDID_DETAILED_TIMING_HIMAGE_SIZE(_x) \
	82	((GET_BITS((_x).himage_vimage_size_hi, 7, 4) << 8) + (_x).himage_size)
	83	#define EDID_DETAILED_TIMING_VIMAGE_SIZE(_x) \
	84	((GET_BITS((_x).himage_vimage_size_hi, 3, 0) << 8) + (_x).vimage_size)
	85	unsigned char hborder;
	86	unsigned char vborder;
	87	unsigned char flags;
	88	#define EDID_DETAILED_TIMING_FLAG_INTERLACED(_x) \
	89	GET_BIT((_x).flags, 7)
	90	#define EDID_DETAILED_TIMING_FLAG_STEREO(_x) \
	91	GET_BITS((_x).flags, 6, 5)
	92	#define EDID_DETAILED_TIMING_FLAG_DIGITAL_COMPOSITE(_x) \
	93	GET_BITS((_x).flags, 4, 3)
	94	#define EDID_DETAILED_TIMING_FLAG_POLARITY(_x) \
	95	GET_BITS((_x).flags, 2, 1)
b7ce12dd HG	96	#define EDID_DETAILED_TIMING_FLAG_VSYNC_POLARITY(_x) \
	97	GET_BIT((_x).flags, 2)
	98	#define EDID_DETAILED_TIMING_FLAG_HSYNC_POLARITY(_x) \
	99	GET_BIT((_x).flags, 1)
d46b5f7d TWHT	100	#define EDID_DETAILED_TIMING_FLAG_INTERLEAVED(_x) \
	101	GET_BIT((_x).flags, 0)
	102	} __attribute__ ((__packed__));
	103
	104	enum edid_monitor_descriptor_types {
	105	EDID_MONITOR_DESCRIPTOR_SERIAL = 0xff,
	106	EDID_MONITOR_DESCRIPTOR_ASCII = 0xfe,
	107	EDID_MONITOR_DESCRIPTOR_RANGE = 0xfd,
	108	EDID_MONITOR_DESCRIPTOR_NAME = 0xfc,
	109	};
	110
	111	struct edid_monitor_descriptor {
	112	uint16_t zero_flag_1;
	113	unsigned char zero_flag_2;
	114	unsigned char type;
	115	unsigned char zero_flag_3;
	116	union {
	117	char string[13];
	118	struct {
	119	unsigned char vertical_min;
	120	unsigned char vertical_max;
	121	unsigned char horizontal_min;
	122	unsigned char horizontal_max;
	123	unsigned char pixel_clock_max;
	124	unsigned char gtf_data[8];
	125	} range_data;
	126	} data;
	127	} __attribute__ ((__packed__));
	128
	129	struct edid1_info {
	130	unsigned char header[8];
	131	unsigned char manufacturer_name[2];
	132	#define EDID1_INFO_MANUFACTURER_NAME_ZERO(_x) \
	133	GET_BIT(((_x).manufacturer_name[0]), 7)
	134	#define EDID1_INFO_MANUFACTURER_NAME_CHAR1(_x) \
	135	GET_BITS(((_x).manufacturer_name[0]), 6, 2)
	136	#define EDID1_INFO_MANUFACTURER_NAME_CHAR2(_x) \
	137	((GET_BITS(((_x).manufacturer_name[0]), 1, 0) << 3) + \
	138	GET_BITS(((_x).manufacturer_name[1]), 7, 5))
	139	#define EDID1_INFO_MANUFACTURER_NAME_CHAR3(_x) \
	140	GET_BITS(((_x).manufacturer_name[1]), 4, 0)
	141	unsigned char product_code[2];
	142	#define EDID1_INFO_PRODUCT_CODE(_x) \
	143	(((uint16_t)(_x).product_code[1] << 8) + (_x).product_code[0])
	144	unsigned char serial_number[4];
	145	#define EDID1_INFO_SERIAL_NUMBER(_x) \
	146	(((uint32_t)(_x).serial_number[3] << 24) + \
	147	((_x).serial_number[2] << 16) + ((_x).serial_number[1] << 8) + \
	148	(_x).serial_number[0])
	149	unsigned char week;
	150	unsigned char year;
	151	unsigned char version;
	152	unsigned char revision;
	153	unsigned char video_input_definition;
	154	#define EDID1_INFO_VIDEO_INPUT_DIGITAL(_x) \
	155	GET_BIT(((_x).video_input_definition), 7)
	156	#define EDID1_INFO_VIDEO_INPUT_VOLTAGE_LEVEL(_x) \
	157	GET_BITS(((_x).video_input_definition), 6, 5)
	158	#define EDID1_INFO_VIDEO_INPUT_BLANK_TO_BLACK(_x) \
	159	GET_BIT(((_x).video_input_definition), 4)
	160	#define EDID1_INFO_VIDEO_INPUT_SEPARATE_SYNC(_x) \
	161	GET_BIT(((_x).video_input_definition), 3)
	162	#define EDID1_INFO_VIDEO_INPUT_COMPOSITE_SYNC(_x) \
	163	GET_BIT(((_x).video_input_definition), 2)
164	#define EDID1_INFO_VIDEO_INPUT_SYNC_ON_GREEN(_x) \
165	GET_BIT(((_x).video_input_definition), 1)
166	#define EDID1_INFO_VIDEO_INPUT_SERRATION_V(_x) \
167	GET_BIT(((_x).video_input_definition), 0)
168	unsigned char max_size_horizontal;
169	unsigned char max_size_vertical;
170	unsigned char gamma;
171	unsigned char feature_support;
172	#define EDID1_INFO_FEATURE_STANDBY(_x) \
173	GET_BIT(((_x).feature_support), 7)
174	#define EDID1_INFO_FEATURE_SUSPEND(_x) \
175	GET_BIT(((_x).feature_support), 6)
176	#define EDID1_INFO_FEATURE_ACTIVE_OFF(_x) \
177	GET_BIT(((_x).feature_support), 5)
178	#define EDID1_INFO_FEATURE_DISPLAY_TYPE(_x) \
179	GET_BITS(((_x).feature_support), 4, 3)
180	#define EDID1_INFO_FEATURE_RGB(_x) \
181	GET_BIT(((_x).feature_support), 2)
182	#define EDID1_INFO_FEATURE_PREFERRED_TIMING_MODE(_x) \
183	GET_BIT(((_x).feature_support), 1)
184	#define EDID1_INFO_FEATURE_DEFAULT_GTF_SUPPORT(_x) \
185	GET_BIT(((_x).feature_support), 0)
186	unsigned char color_characteristics[10];
187	unsigned char established_timings[3];
188	#define EDID1_INFO_ESTABLISHED_TIMING_720X400_70(_x) \
189	GET_BIT(((_x).established_timings[0]), 7)
190	#define EDID1_INFO_ESTABLISHED_TIMING_720X400_88(_x) \
191	GET_BIT(((_x).established_timings[0]), 6)
192	#define EDID1_INFO_ESTABLISHED_TIMING_640X480_60(_x) \
193	GET_BIT(((_x).established_timings[0]), 5)
194	#define EDID1_INFO_ESTABLISHED_TIMING_640X480_67(_x) \
195	GET_BIT(((_x).established_timings[0]), 4)
196	#define EDID1_INFO_ESTABLISHED_TIMING_640X480_72(_x) \
197	GET_BIT(((_x).established_timings[0]), 3)
198	#define EDID1_INFO_ESTABLISHED_TIMING_640X480_75(_x) \
199	GET_BIT(((_x).established_timings[0]), 2)
200	#define EDID1_INFO_ESTABLISHED_TIMING_800X600_56(_x) \
201	GET_BIT(((_x).established_timings[0]), 1)
202	#define EDID1_INFO_ESTABLISHED_TIMING_800X600_60(_x) \
203	GET_BIT(((_x).established_timings[0]), 0)
204	#define EDID1_INFO_ESTABLISHED_TIMING_800X600_72(_x) \
205	GET_BIT(((_x).established_timings[1]), 7)
206	#define EDID1_INFO_ESTABLISHED_TIMING_800X600_75(_x) \
207	GET_BIT(((_x).established_timings[1]), 6)
208	#define EDID1_INFO_ESTABLISHED_TIMING_832X624_75(_x) \
209	GET_BIT(((_x).established_timings[1]), 5)
210	#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_87I(_x) \
211	GET_BIT(((_x).established_timings[1]), 4)
212	#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_60(_x) \
213	GET_BIT(((_x).established_timings[1]), 3)
214	#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_70(_x) \
215	GET_BIT(((_x).established_timings[1]), 2)
216	#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_75(_x) \
217	GET_BIT(((_x).established_timings[1]), 1)
218	#define EDID1_INFO_ESTABLISHED_TIMING_1280X1024_75(_x) \
219	GET_BIT(((_x).established_timings[1]), 0)
220	#define EDID1_INFO_ESTABLISHED_TIMING_1152X870_75(_x) \
221	GET_BIT(((_x).established_timings[2]), 7)
222	struct {
223	unsigned char xresolution;
224	unsigned char aspect_vfreq;
225	} __attribute__((__packed__)) standard_timings[8];
226	#define EDID1_INFO_STANDARD_TIMING_XRESOLUTION(_x, _i) \
227	(((_x).standard_timings[_i]).xresolution)
228	#define EDID1_INFO_STANDARD_TIMING_ASPECT(_x, _i) \
229	GET_BITS(((_x).standard_timings[_i].aspect_vfreq), 7, 6)
230	#define EDID1_INFO_STANDARD_TIMING_VFREQ(_x, _i) \
231	GET_BITS(((_x).standard_timings[_i].aspect_vfreq), 5, 0)
232	union {
233	unsigned char timing[72];
234	struct edid_monitor_descriptor descriptor[4];
235	} monitor_details;
236	unsigned char extension_flag;
237	unsigned char checksum;
238	} __attribute__ ((__packed__));
d2fabdc7	239
43c6bdd0 JS	240	enum edid_cea861_db_types {
	241	EDID_CEA861_DB_AUDIO = 0x01,
	242	EDID_CEA861_DB_VIDEO = 0x02,
	243	EDID_CEA861_DB_VENDOR = 0x03,
	244	EDID_CEA861_DB_SPEAKER = 0x04,
	245	};
	246
d2fabdc7 HG	247	struct edid_cea861_info {
	248	unsigned char extension_tag;
	249	#define EDID_CEA861_EXTENSION_TAG 0x02
	250	unsigned char revision;
	251	unsigned char dtd_offset;
	252	unsigned char dtd_count;
	253	#define EDID_CEA861_SUPPORTS_UNDERSCAN(_x) \
	254	GET_BIT(((_x).dtd_count), 7)
	255	#define EDID_CEA861_SUPPORTS_BASIC_AUDIO(_x) \
	256	GET_BIT(((_x).dtd_count), 6)
	257	#define EDID_CEA861_SUPPORTS_YUV444(_x) \
	258	GET_BIT(((_x).dtd_count), 5)
	259	#define EDID_CEA861_SUPPORTS_YUV422(_x) \
	260	GET_BIT(((_x).dtd_count), 4)
	261	#define EDID_CEA861_DTD_COUNT(_x) \
	262	GET_BITS(((_x).dtd_count), 3, 0)
	263	unsigned char data[124];
43c6bdd0 JS	264	#define EDID_CEA861_DB_TYPE(_x, offset) \
	265	GET_BITS((_x).data[offset], 7, 5)
	266	#define EDID_CEA861_DB_LEN(_x, offset) \
	267	GET_BITS((_x).data[offset], 4, 0)
d2fabdc7	268	} __attribute__ ((__packed__));
d46b5f7d TWHT	269
	270	/**
	271	* Print the EDID info.
	272	*
	273	* @param edid_info The EDID info to be printed
	274	*/
	275	void edid_print_info(struct edid1_info *edid_info);
	276
	277	/**
	278	* Check the EDID info.
	279	*
	280	* @param info The EDID info to be checked
	281	* @return 0 on valid, or -1 on invalid
	282	*/
	283	int edid_check_info(struct edid1_info *info);
	284
e745d064 HG	285	/**
	286	* Check checksum of a 128 bytes EDID data block
	287	*
	288	* @param edid_block EDID block data
	289	*
	290	* @return 0 on success, or a negative errno on error
	291	*/
	292	int edid_check_checksum(u8 *edid_block);
	293
d46b5f7d TWHT	294	/**
	295	* Get the horizontal and vertical rate ranges of the monitor.
	296	*
	297	* @param edid The EDID info
	298	* @param hmin Returns the minimum horizontal rate
	299	* @param hmax Returns the maxium horizontal rate
	300	* @param vmin Returns the minimum vertical rate
	301	* @param vmax Returns the maxium vertical rate
	302	* @return 0 on success, or -1 on error
	303	*/
	304	int edid_get_ranges(struct edid1_info edid, unsigned int hmin,
	305	unsigned int hmax, unsigned int vmin,
	306	unsigned int *vmax);
	307
00cf1167 SG	308	struct display_timing;
	309
	310	/**
	311	* edid_get_timing() - Get basic digital display parameters
	312	*
	313	* @param buf Buffer containing EDID data
	314	* @param buf_size Size of buffer in bytes
	315	* @param timing Place to put preferring timing information
	316	* @param panel_bits_per_colourp Place to put the number of bits per
	317	* colour supported by the panel. This will be set to
	318	* -1 if not available
	319	* @return 0 if timings are OK, -ve on error
	320	*/
	321	int edid_get_timing(u8 buf, int buf_size, struct display_timing timing,
	322	int *panel_bits_per_colourp);
	323
d46b5f7d	324	#endif /* __EDID_H_ */