hw/xfree86/ddc/xf86DDC.h

   1
   2 /* xf86DDC.h
   3  *
   4  * This file contains all information to interpret a standard EDIC block
   5  * transmitted by a display device via DDC (Display Data Channel). So far
   6  * there is no information to deal with optional EDID blocks.
   7  * DDC is a Trademark of VESA (Video Electronics Standard Association).
   8  *
   9  * Copyright 1998 by Egbert Eich <Egbert.Eich@Physik.TU-Darmstadt.DE>
  10  */
  11
  12 #ifndef XF86_DDC_H
  13 #define XF86_DDC_H
  14
  15 #include "edid.h"
  16 #include "xf86i2c.h"
  17 #include "xf86str.h"
  18
  19 /* speed up / slow down */
  20 typedef enum {
  21     DDC_SLOW,
  22     DDC_FAST
  23 } xf86ddcSpeed;
  24
  25 typedef void (*DDC1SetSpeedProc) (ScrnInfoPtr, xf86ddcSpeed);
  26
  27 extern _X_EXPORT xf86MonPtr xf86DoEDID_DDC1(ScrnInfoPtr pScrn,
  28                                             DDC1SetSpeedProc DDC1SetSpeed,
  29                                             unsigned
  30                                             int (*DDC1Read) (ScrnInfoPtr)
  31     );
  32
  33 extern _X_EXPORT xf86MonPtr xf86DoEDID_DDC2(ScrnInfoPtr pScrn, I2CBusPtr pBus);
  34
  35 extern _X_EXPORT xf86MonPtr xf86DoEEDID(ScrnInfoPtr pScrn, I2CBusPtr pBus, Bool);
  36
  37 extern _X_EXPORT xf86MonPtr xf86PrintEDID(xf86MonPtr monPtr);
  38
  39 extern _X_EXPORT xf86MonPtr xf86InterpretEDID(int screenIndex, Uchar * block);
  40
  41 extern _X_EXPORT xf86MonPtr xf86InterpretEEDID(int screenIndex, Uchar * block);
  42
  43 extern _X_EXPORT void
  44  xf86EdidMonitorSet(int scrnIndex, MonPtr Monitor, xf86MonPtr DDC);
  45
  46 extern _X_EXPORT Bool xf86SetDDCproperties(ScrnInfoPtr pScreen, xf86MonPtr DDC);
  47
  48 extern _X_EXPORT Bool
  49  xf86MonitorIsHDMI(xf86MonPtr mon);
  50
  51 extern _X_EXPORT xf86MonPtr xf86DoDisplayID(ScrnInfoPtr pScrn, I2CBusPtr pBus);
  52
  53 extern _X_EXPORT void
  54  xf86DisplayIDMonitorSet(int scrnIndex, MonPtr mon, xf86MonPtr DDC);
  55
  56 extern _X_EXPORT DisplayModePtr
  57 FindDMTMode(int hsize, int vsize, int refresh, Bool rb);
  58
  59 extern _X_EXPORT const DisplayModeRec DMTModes[];
  60
  61 /*
  62  * Quirks to work around broken EDID data from various monitors.
  63  */
  64 typedef enum {
  65     DDC_QUIRK_NONE = 0,
  66     /* First detailed mode is bogus, prefer largest mode at 60hz */
  67     DDC_QUIRK_PREFER_LARGE_60 = 1 << 0,
  68     /* 135MHz clock is too high, drop a bit */
  69     DDC_QUIRK_135_CLOCK_TOO_HIGH = 1 << 1,
  70     /* Prefer the largest mode at 75 Hz */
  71     DDC_QUIRK_PREFER_LARGE_75 = 1 << 2,
  72     /* Convert detailed timing's horizontal from units of cm to mm */
  73     DDC_QUIRK_DETAILED_H_IN_CM = 1 << 3,
  74     /* Convert detailed timing's vertical from units of cm to mm */
  75     DDC_QUIRK_DETAILED_V_IN_CM = 1 << 4,
  76     /* Detailed timing descriptors have bogus size values, so just take the
  77      * maximum size and use that.
  78      */
  79     DDC_QUIRK_DETAILED_USE_MAXIMUM_SIZE = 1 << 5,
  80     /* Monitor forgot to set the first detailed is preferred bit. */
  81     DDC_QUIRK_FIRST_DETAILED_PREFERRED = 1 << 6,
  82     /* use +hsync +vsync for detailed mode */
  83     DDC_QUIRK_DETAILED_SYNC_PP = 1 << 7,
  84     /* Force single-link DVI bandwidth limit */
  85     DDC_QUIRK_DVI_SINGLE_LINK = 1 << 8,
  86 } ddc_quirk_t;
  87
  88 typedef void (*handle_detailed_fn) (struct detailed_monitor_section *, void *);
  89
  90 void xf86ForEachDetailedBlock(xf86MonPtr mon, handle_detailed_fn, void *data);
  91
  92 ddc_quirk_t xf86DDCDetectQuirks(int scrnIndex, xf86MonPtr DDC, Bool verbose);
  93
  94 void xf86DetTimingApplyQuirks(struct detailed_monitor_section *det_mon,
  95                               ddc_quirk_t quirks, int hsize, int vsize);
  96
  97 typedef void (*handle_video_fn) (struct cea_video_block *, void *);
  98
  99 void xf86ForEachVideoBlock(xf86MonPtr, handle_video_fn, void *);
 100
 101 #endif