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DDC.h
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//
// DDC.h
// DDC Panel
//
// Created by Jonathan Taylor on 7/10/09.
// See ftp://ftp.cis.nctu.edu.tw/pub/csie/Software/X11/private/VeSaSpEcS/VESA_Document_Center_Monitor_Interface/mccsV3.pdf
// See http://read.pudn.com/downloads110/ebook/456020/E-EDID%20Standard.pdf
// See ftp://ftp.cis.nctu.edu.tw/pub/csie/Software/X11/private/VeSaSpEcS/VESA_Document_Center_Monitor_Interface/EEDIDrAr2.pdf
//
#ifndef DDC_Panel_DDC_h
#define DDC_Panel_DDC_h
#include <IOKit/i2c/IOI2CInterface.h>
#define RESET 0x04
#define RESET_BRIGHTNESS_AND_CONTRAST 0x05
#define RESET_GEOMETRY 0x06
#define RESET_COLOR 0x08
#define BRIGHTNESS 0x10 //OK
#define CONTRAST 0x12 //OK
#define COLOR_PRESET_A 0x14 // dell u2515h -> Presets: 4 = 5000K, 5 = 6500K, 6 = 7500K, 8 = 9300K, 9 = 10000K, 11 = 5700K, 12 = Custom Color
#define RED_GAIN 0x16
#define GREEN_GAIN 0x18
#define BLUE_GAIN 0x1A
#define AUTO_SIZE_CENTER 0x1E
#define WIDTH 0x22
#define HEIGHT 0x32
#define VERTICAL_POS 0x30
#define HORIZONTAL_POS 0x20
#define PINCUSHION_AMP 0x24
#define PINCUSHION_PHASE 0x42
#define KEYSTONE_BALANCE 0x40
#define PINCUSHION_BALANCE 0x26
#define TOP_PINCUSHION_AMP 0x46
#define TOP_PINCUSHION_BALANCE 0x48
#define BOTTOM_PINCUSHION_AMP 0x4A
#define BOTTOM_PINCUSHION_BALANCE 0x4C
#define VERTICAL_LINEARITY 0x3A
#define VERTICAL_LINEARITY_BALANCE 0x3C
#define HORIZONTAL_STATIC_CONVERGENCE 0x28
#define VERTICAL_STATIC_CONVERGENCE 0x28
#define MOIRE_CANCEL 0x56
#define INPUT_SOURCE 0x60
#define AUDIO_SPEAKER_VOLUME 0x62
#define RED_BLACK_LEVEL 0x6C
#define GREEN_BLACK_LEVEL 0x6E
#define BLUE_BLACK_LEVEL 0x70
#define ORIENTATION 0xAA
#define AUDIO_MUTE 0x8D
#define SETTINGS 0xB0 //unsure on this one
#define ON_SCREEN_DISPLAY 0xCA // read only -> returns '1' (OSD closed) or '2' (OSD active)
#define OSD_LANGUAGE 0xCC
#define DPMS 0xD6
#define COLOR_PRESET_B 0xDC // dell u2515h -> Presets: 0 = Standard, 2 = Multimedia, 3 = Movie, 5 = Game
#define VCP_VERSION 0xDF
#define COLOR_PRESET_C 0xE0 // dell u2515h -> Brightness on/off (0 or 1)
#define POWER_CONTROL 0xE1
#define TOP_LEFT_SCREEN_PURITY 0xE8
#define TOP_RIGHT_SCREEN_PURITY 0xE9
#define BOTTOM_LEFT_SCREEN_PURITY 0xE8
#define BOTTOM_RIGHT_SCREEN_PURITY 0xEB
#define OSD 1
struct DDCWriteCommand
{
UInt8 control_id;
UInt8 new_value;
};
struct DDCReadCommand
{
UInt8 control_id;
bool success;
UInt8 max_value;
UInt8 current_value;
};
struct EDID {
UInt64 header : 64;
UInt8 : 1;
UInt16 eisaid :15;
UInt16 productcode : 16;
UInt32 serial : 32;
UInt8 week : 8;
UInt8 year : 8;
UInt8 versionmajor : 8;
UInt8 versionminor : 8;
union videoinput {
struct digitalinput {
UInt8 type : 1;
UInt8 : 6;
UInt8 dfp : 1;
} digital;
struct analoginput {
UInt8 type : 1;
UInt8 synclevels : 2;
UInt8 pedestal : 1;
UInt8 separate : 1;
UInt8 composite : 1;
UInt8 green : 1;
UInt8 serrated : 1;
} analog;
} videoinput;
UInt8 maxh : 8;
UInt8 maxv : 8;
UInt8 gamma : 8;
UInt8 standby : 1;
UInt8 suspend : 1;
UInt8 activeoff : 1;
UInt8 displaytype: 2;
UInt8 srgb : 1;
UInt8 preferredtiming : 1;
UInt8 gtf : 1;
UInt8 redxlsb : 2;
UInt8 redylsb : 2;
UInt8 greenxlsb : 2;
UInt8 greenylsb : 2;
UInt8 bluexlsb : 2;
UInt8 blueylsb : 2;
UInt8 whitexlsb : 2;
UInt8 whiteylsb : 2;
UInt8 redxmsb : 8;
UInt8 redymsb : 8;
UInt8 greenxmsb : 8;
UInt8 greenymsb : 8;
UInt8 bluexmsb : 8;
UInt8 blueymsb : 8;
UInt8 whitexmsb : 8;
UInt8 whiteymsb : 8;
UInt8 t720x400a70 : 1;
UInt8 t720x400a88 : 1;
UInt8 t640x480a60 : 1;
UInt8 t640x480a67 : 1;
UInt8 t640x480a72 : 1;
UInt8 t640x480a75 : 1;
UInt8 t800x600a56 : 1;
UInt8 t800x600a60 : 1;
UInt8 t800x600a72 : 1;
UInt8 t800x600a75 : 1;
UInt8 t832x624a75 : 1;
UInt8 t1024x768a87 : 1;
UInt8 t1024x768a60 : 1;
UInt8 t1024x768a72 : 1;
UInt8 t1024x768a75 : 1;
UInt8 t1280x1024a75 : 1;
UInt8 t1152x870a75 : 1;
UInt8 othermodes : 7;
struct timing {
UInt8 xresolution : 8;
UInt8 ratio : 2;
UInt8 vertical : 6;
} timing1;
struct timing timing2;
struct timing timing3;
struct timing timing4;
struct timing timing5;
struct timing timing6;
struct timing timing7;
struct timing timing8;
union descriptor {
struct timingdetail {
UInt16 clock : 16;
UInt8 hactivelsb : 8;
UInt8 hblankinglsb : 8;
UInt8 hactivemsb : 4;
UInt8 hblankingmsb : 4;
UInt8 vactivelsb : 8;
UInt8 vblankinglsb : 8;
UInt8 vactivemsb : 4;
UInt8 vblankingmsb : 4;
UInt8 hsyncoffsetlsb : 8;
UInt8 hsyncpulselsb : 8;
UInt8 vsyncoffsetlsb : 4;
UInt8 vsyncpulselsb : 4;
UInt8 hsyncoffsetmsb : 2;
UInt8 hsyncpulsemsb : 2;
UInt8 vsyncoffsetmsb : 2;
UInt8 vsyncpulsemsb : 2;
UInt8 hsizelsb : 8;
UInt8 vsizelsb : 8;
UInt8 hsizemsb : 4;
UInt8 vsizemsb : 4;
UInt8 hborder : 8;
UInt8 vborder : 8;
UInt8 interlaced : 1;
UInt8 stereo : 2;
UInt8 synctype : 2;
UInt8 vsyncpol_serrated: 1;
UInt8 hsyncpol_syncall: 1;
UInt8 twowaystereo : 1;
} timing;
struct text {
UInt32 : 24;
UInt8 type : 8;
UInt8 : 8;
char data[13];
} text;
struct __attribute__ ((packed)) rangelimits {
UInt64 header : 40;
UInt8 minvfield : 8;
UInt8 minhfield : 8;
UInt8 minhline : 8;
UInt8 minvline : 8;
UInt8 maxclock : 8;
UInt8 extended : 8;
UInt8 : 8;
UInt8 startfreq : 8;
UInt8 cvalue : 8;
UInt16 mvalue : 16;
UInt8 kvalue : 8;
UInt8 jvalue : 8;
} range;
struct __attribute__ ((packed)) whitepoint {
UInt64 header : 40;
UInt8 index : 8;
UInt8 : 4;
UInt8 whitexlsb : 2;
UInt8 whiteylsb : 2;
UInt8 whitexmsb : 8;
UInt8 whiteymsb : 8;
UInt8 gamma : 8;
UInt8 index2 : 8;
UInt8 : 4;
UInt8 whitexlsb2 : 2;
UInt8 whiteylsb2 : 2;
UInt8 whitexmsb2 : 8;
UInt8 whiteymsb2 : 8;
UInt8 gamma2 : 8;
UInt32 : 24;
} whitepoint;
} descriptors[4];
UInt8 extensions : 8;
UInt8 checksum : 8;
};
bool DDCWrite(CGDirectDisplayID displayID, struct DDCWriteCommand *write);
bool DDCRead(CGDirectDisplayID displayID, struct DDCReadCommand *read);
bool EDIDTest(CGDirectDisplayID displayID, struct EDID *edid);
UInt32 SupportedTransactionType();
#endif