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/*

 * Copyright © 2007-2008 Intel Corporation

 *   Jesse Barnes 

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.

 */

#ifndef __DRM_EDID_H__

#define __DRM_EDID_H__

#include 

#define EDID_LENGTH 128

#define DDC_ADDR 0x50

struct est_timings {

	u8 t1;

	u8 t2;

	u8 mfg_rsvd;

} __attribute__((packed));

/* 00=16:10, 01=4:3, 10=5:4, 11=16:9 */

#define EDID_TIMING_ASPECT_SHIFT 6

#define EDID_TIMING_ASPECT_MASK  (0x3 << EDID_TIMING_ASPECT_SHIFT)

/* need to add 60 */

#define EDID_TIMING_VFREQ_SHIFT  0

#define EDID_TIMING_VFREQ_MASK   (0x3f << EDID_TIMING_VFREQ_SHIFT)

struct std_timing {

	u8 hsize; /* need to multiply by 8 then add 248 */

	u8 vfreq_aspect;

} __attribute__((packed));

#define DRM_EDID_PT_HSYNC_POSITIVE (1 << 1)

#define DRM_EDID_PT_VSYNC_POSITIVE (1 << 2)

#define DRM_EDID_PT_SEPARATE_SYNC  (3 << 3)

#define DRM_EDID_PT_STEREO         (1 << 5)

#define DRM_EDID_PT_INTERLACED     (1 << 7)

/* If detailed data is pixel timing */

struct detailed_pixel_timing {

	u8 hactive_lo;

	u8 hblank_lo;

	u8 hactive_hblank_hi;

	u8 vactive_lo;

	u8 vblank_lo;

	u8 vactive_vblank_hi;

	u8 hsync_offset_lo;

	u8 hsync_pulse_width_lo;

	u8 vsync_offset_pulse_width_lo;

	u8 hsync_vsync_offset_pulse_width_hi;

	u8 width_mm_lo;

	u8 height_mm_lo;

	u8 width_height_mm_hi;

	u8 hborder;

	u8 vborder;

	u8 misc;

} __attribute__((packed));

/* If it's not pixel timing, it'll be one of the below */

struct detailed_data_string {

	u8 str[13];

} __attribute__((packed));

struct detailed_data_monitor_range {

	u8 min_vfreq;

	u8 max_vfreq;

	u8 min_hfreq_khz;

	u8 max_hfreq_khz;

	u8 pixel_clock_mhz; /* need to multiply by 10 */

    u16 sec_gtf_toggle; /* A000=use above, 20=use below */

	u8 hfreq_start_khz; /* need to multiply by 2 */

	u8 c; /* need to divide by 2 */

    u16 m;

	u8 k;

	u8 j; /* need to divide by 2 */

} __attribute__((packed));

struct detailed_data_wpindex {

	u8 white_yx_lo; /* Lower 2 bits each */

	u8 white_x_hi;

	u8 white_y_hi;

	u8 gamma; /* need to divide by 100 then add 1 */

} __attribute__((packed));

struct detailed_data_color_point {

	u8 windex1;

	u8 wpindex1[3];

	u8 windex2;

	u8 wpindex2[3];

} __attribute__((packed));

struct detailed_non_pixel {

	u8 pad1;

	u8 type; /* ff=serial, fe=string, fd=monitor range, fc=monitor name

		    fb=color point data, fa=standard timing data,

		    f9=undefined, f8=mfg. reserved */

	u8 pad2;

	union {

		struct detailed_data_string str;

		struct detailed_data_monitor_range range;

		struct detailed_data_wpindex color;

		struct std_timing timings[5];

	} data;

} __attribute__((packed));

#define EDID_DETAIL_STD_MODES 0xfa

#define EDID_DETAIL_MONITOR_CPDATA 0xfb

#define EDID_DETAIL_MONITOR_NAME 0xfc

#define EDID_DETAIL_MONITOR_RANGE 0xfd

#define EDID_DETAIL_MONITOR_STRING 0xfe

#define EDID_DETAIL_MONITOR_SERIAL 0xff

struct detailed_timing {

    u16 pixel_clock; /* need to multiply by 10 KHz */

	union {

		struct detailed_pixel_timing pixel_data;

		struct detailed_non_pixel other_data;

	} data;

} __attribute__((packed));

#define DRM_EDID_INPUT_SERRATION_VSYNC (1 << 0)

#define DRM_EDID_INPUT_SYNC_ON_GREEN   (1 << 1)

#define DRM_EDID_INPUT_COMPOSITE_SYNC  (1 << 2)

#define DRM_EDID_INPUT_SEPARATE_SYNCS  (1 << 3)

#define DRM_EDID_INPUT_BLANK_TO_BLACK  (1 << 4)

#define DRM_EDID_INPUT_VIDEO_LEVEL     (3 << 5)

#define DRM_EDID_INPUT_DIGITAL         (1 << 7) /* bits below must be zero if set */

#define DRM_EDID_FEATURE_DEFAULT_GTF      (1 << 0)

#define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 1)

#define DRM_EDID_FEATURE_STANDARD_COLOR   (1 << 2)

#define DRM_EDID_FEATURE_DISPLAY_TYPE     (3 << 3) /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */

#define DRM_EDID_FEATURE_PM_ACTIVE_OFF    (1 << 5)

#define DRM_EDID_FEATURE_PM_SUSPEND       (1 << 6)

#define DRM_EDID_FEATURE_PM_STANDBY       (1 << 7)

struct edid {

	u8 header[8];

	/* Vendor & product info */

	u8 mfg_id[2];

	u8 prod_code[2];

	u32 serial; /* FIXME: byte order */

	u8 mfg_week;

	u8 mfg_year;

	/* EDID version */

	u8 version;

	u8 revision;

	/* Display info: */

	u8 input;

	u8 width_cm;

	u8 height_cm;

	u8 gamma;

	u8 features;

	/* Color characteristics */

	u8 red_green_lo;

	u8 black_white_lo;

	u8 red_x;

	u8 red_y;

	u8 green_x;

	u8 green_y;

	u8 blue_x;

	u8 blue_y;

	u8 white_x;

	u8 white_y;

	/* Est. timings and mfg rsvd timings*/

	struct est_timings established_timings;

	/* Standard timings 1-8*/

	struct std_timing standard_timings[8];

	/* Detailing timings 1-4 */

	struct detailed_timing detailed_timings[4];

	/* Number of 128 byte ext. blocks */

	u8 extensions;

	/* Checksum */

	u8 checksum;

} __attribute__((packed));

#define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))

#endif /* __DRM_EDID_H__ */