Initial revisionXORG-STABLE

1 files changed, 960 insertions, 0 deletions

diff --git a/src/mga_merge.c b/src/mga_merge.c
new file mode 100644
index 0000000..e70382f
--- /dev/null
+++ b/src/mga_merge.c
@@ -0,0 +1,960 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/mga/mga_merge.c,v 1.2 2002/09/18 21:25:45 tsi Exp $ */
+
+/* All drivers should typically include these */
+#include "xf86.h"
+#include "xf86_OSproc.h"
+#include "xf86Resources.h"
+
+/* All drivers need this */
+#include "xf86_ansic.h"
+
+#include "compiler.h"
+
+/* Drivers for PCI hardware need this */
+#include "xf86PciInfo.h"
+#include "mga.h"
+#include "mga_macros.h"
+#include "mga_reg.h"
+#include "mga_merge.h"
+
+#include "fbdevhw.h"
+
+static int
+StrToRanges(range* r, char* s) {
+    float num=0.0;
+    int rangenum=0;
+    Bool gotdash = FALSE;
+    Bool nextdash = FALSE;
+    char* strnum=NULL;
+    do {
+        switch(*s) {
+            case '0': case '1': case '2': case '3': case '4': case '5':
+            case '6': case '7': case '8': case '9': case '.':
+                if(strnum == NULL) {
+                    strnum = s;
+                    gotdash = nextdash;
+                    nextdash = FALSE;
+                 }
+  
+                break;
+            case '-':
+            case ' ': case 0:
+                if(strnum == NULL) break; /*is extra seperator */
+                if(strnum != NULL) sscanf(strnum,"%f",&num);
+                if(gotdash) /*if wasn't singlet: correct. */
+                    r[rangenum-1].hi = num;
+                else { /*first, assume singlet */
+                    r[rangenum].lo = num;
+                    r[rangenum].hi = num;
+                    rangenum++;
+                }
+                strnum = NULL;
+                if(*s == '-')
+                    nextdash = (rangenum != 0); /*ignore dash if before any number.*/
+                break;
+            default :
+                return 0;        
+        }
+    } while(*(s++) != 0); /* run loop for every char including null terminator.*/
+       
+    return rangenum;
+}            
+
+
+/* Copys mode i, links the result to dest, and returns it.
+ * Links i and j in Private record.
+ * if dest is NULL, return value is copy of i linked to itself.
+ */
+static DisplayModePtr
+CopyModeNLink(ScrnInfoPtr pScrn, DisplayModePtr dest, DisplayModePtr i, DisplayModePtr j, MgaScrn2Rel srel) {
+    DisplayModePtr mode;
+    int dx = 0,dy = 0;
+    /* start with first node */
+    mode = xalloc(sizeof(DisplayModeRec));
+    memcpy(mode,i, sizeof(DisplayModeRec));
+    mode->Private = xalloc(sizeof(MergedDisplayModeRec));
+    ((MergedDisplayModePtr)mode->Private)->Monitor1 = i;
+    ((MergedDisplayModePtr)mode->Private)->Monitor2 = j;
+    ((MergedDisplayModePtr)mode->Private)->Monitor2Pos = srel;
+    mode->PrivSize = 0;
+    
+        switch(srel) {
+            case mgaLeftOf: 
+            case mgaRightOf:
+                dx = min(pScrn->virtualX,i->HDisplay + j->HDisplay) -  mode->HDisplay;
+                dy = min(pScrn->virtualY,  max(i->VDisplay,j->VDisplay)) - mode->VDisplay;
+                break;
+            case mgaAbove: 
+            case mgaBelow:
+                dy = min(pScrn->virtualY,i->VDisplay + j->VDisplay) - mode->VDisplay;
+                dx = min(pScrn->virtualX, max(i->HDisplay,j->HDisplay)) - mode->HDisplay;
+                break;
+            case mgaClone:
+                dx = min(pScrn->virtualX, max(i->HDisplay,j->HDisplay)) - mode->HDisplay;
+                dy = min(pScrn->virtualY, max(i->VDisplay,j->VDisplay)) - mode->VDisplay;
+                break;
+        }
+    mode->HDisplay += dx;
+    mode->HSyncStart += dx;
+    mode->HSyncEnd += dx;
+    mode->HTotal += dx;
+    mode->VDisplay += dy;
+    mode->VSyncStart += dy;
+    mode->VSyncEnd += dy;
+    mode->VTotal += dy;
+    mode->Clock = 0; /* Shows we're in Merge mode. */
+   
+    mode->next = mode;
+    mode->prev = mode;
+
+    if(dest) {
+        /* Insert node after "dest" */
+        mode->next = dest->next; 
+        dest->next->prev = mode;
+        mode->prev = dest;
+        dest->next = mode;
+    } 
+
+    return mode;
+}
+
+static DisplayModePtr
+GetModeFromName(char* str, DisplayModePtr i)
+{
+    DisplayModePtr c = i;
+    if(!i) return NULL;
+    do {
+        if(strcmp(str,c->name) == 0) return c;
+        c = c->next;
+    } while(c != i);
+    return NULL;
+}
+
+/* takes a config file string of MetaModes and generates a MetaModeList */
+static DisplayModePtr
+GenerateModeList(ScrnInfoPtr pScrn, char* str,
+		 DisplayModePtr i, DisplayModePtr j, MgaScrn2Rel srel) {
+    char* strmode = str;
+    char modename[256];
+    Bool gotdash = FALSE;
+    MgaScrn2Rel sr;
+    
+    DisplayModePtr mode1 = NULL;
+    DisplayModePtr mode2 = NULL;
+    DisplayModePtr result = NULL;
+    do {
+        switch(*str) {
+            case 0:
+            case '-':
+            case ' ':
+                if((strmode != str)) {/*we got a mode */
+                    /* read new entry */
+                    strncpy(modename,strmode,str - strmode);
+                    modename[str - strmode] = 0;
+                    
+                    if(gotdash) {
+                        if(mode1 == NULL) return NULL;
+                        mode2 = GetModeFromName(modename,j);
+                        if(!mode2) {
+                            xf86DrvMsg(pScrn->scrnIndex, X_CONFIG,
+                                "Mode: \"%s\" is not a supported mode for monitor 2\n",modename);
+                            xf86DrvMsg(pScrn->scrnIndex, X_CONFIG,
+                                "Skipping metamode \"%s-%s\".\n",mode1->name,modename);
+                            mode1 = NULL;
+                        } 
+                    } else {
+                        mode1 = GetModeFromName(modename,i);
+                        if(!mode1) {
+                            char* tmps = str;
+                            xf86DrvMsg(pScrn->scrnIndex, X_CONFIG,
+                                "Mode: \"%s\" is not a supported mode for monitor 1\n",modename);
+                            /* find if a monitor2 mode follows */
+                            gotdash = FALSE;
+                            while(*tmps == ' ') tmps++;
+                            if(*tmps == '-') { /* skip the next mode */
+                                tmps++;
+                                while((*tmps == ' ') && (*tmps != 0)) tmps++; /*skip spaces */
+                                while((*tmps != ' ') && (*tmps != '-') && (*tmps != 0)) tmps++; /*skip modename */
+                                /* for error message */
+                                strncpy(modename,strmode,tmps - strmode);
+                                modename[tmps - strmode] = 0;
+                                str = tmps-1;
+                            }
+                            xf86DrvMsg(pScrn->scrnIndex, X_CONFIG,
+                                "Skipping metamode \"%s\".\n",modename);
+                            mode1 = NULL;
+                        } 
+                    }
+                    gotdash = FALSE;
+                }
+                strmode = str+1; /* number starts on next char */
+                gotdash |= (*str == '-');
+                
+                if(*str != 0) break; /* if end of string, we wont get a chance to catch a char and run the
+                                        default case. do it now */
+                
+            default:
+                if(!gotdash && mode1) { /* complete previous pair */
+                    sr = srel;
+                    if(!mode2) { 
+                        mode2 = GetModeFromName(mode1->name,j);
+                        sr = mgaClone;
+                    }
+                    if(!mode2) { 
+                        xf86DrvMsg(pScrn->scrnIndex, X_CONFIG, 
+                            "Mode: \"%s\" is not a supported mode for monitor 2\n",mode1->name);
+                        xf86DrvMsg(pScrn->scrnIndex, X_CONFIG,
+                            "Skipping clone mode \"%s\".\n");
+                        mode1 = NULL;
+                    } else {
+                        result = CopyModeNLink(pScrn,result,mode1,mode2,sr);
+                        mode1 = NULL;
+                        mode2 = NULL;
+                    }
+                }
+                break;
+                
+        }
+    } while(*(str++) != 0);
+    return result;
+}
+    
+
+/* second CRTC init funcitons. Used to check monitor timings and refreshes. 
+ * this function looses lots of maintainability points due to redundancy, 
+ * but it still was the cleanest and least-intrusive way I found. */
+
+Bool
+MGAPreInitMergedFB(ScrnInfoPtr pScrn1, int flags)
+{
+    ScrnInfoPtr pScrn;
+    MGAPtr pMga;
+    MGAPtr pMga1;
+    MessageType from;
+    int i;
+    char* s;
+    ClockRangePtr clockRanges;
+#ifdef USEMGAHAL
+    ULONG status;
+#endif
+    MgaScrn2Rel Monitor2Pos;
+
+    xf86DrvMsg(pScrn1->scrnIndex, X_INFO, "==== Start of second screen initialization ====\n");
+    pScrn = xalloc(sizeof(ScrnInfoRec));
+    memcpy(pScrn,pScrn1,sizeof(ScrnInfoRec));
+   
+    pScrn->driverPrivate = NULL; 
+    /* Allocate the MGARec driverPrivate */
+    if (!MGAGetRec(pScrn)) {
+	return FALSE;
+    }
+
+    pMga = MGAPTR(pScrn);
+#ifdef USEMGAHAL
+    pMga->pMgaModeInfo = NULL; /*will be allocated later if NULL*/ 
+#endif
+    pMga1 = MGAPTR(pScrn1);
+    pMga1->pScrn2 = pScrn;
+  
+    /* Get the entity, and make sure it is PCI. */
+    pMga->pEnt = pMga1->pEnt;
+    
+    /* Set pMga->device to the relevant Device section */
+    pMga->device = pMga1->device;
+    
+    if (flags & PROBE_DETECT) {
+	MGAProbeDDC(pScrn, pMga->pEnt->index); /*FIXME make shure this probes second monitor */
+	return TRUE;
+    }
+
+    pMga->PciTag = pMga1->PciTag;
+   
+    pMga->Primary = pMga1->Primary;
+
+    /* Set pScrn->monitor */
+    {
+        pScrn->monitor = xalloc(sizeof(MonRec));
+        /* copy everything we don't care about */
+        memcpy(pScrn->monitor,pScrn1->monitor,sizeof(MonRec));
+        pScrn->monitor->DDC = NULL;   /*FIXME:have to try this */ 
+        if ((s = xf86GetOptValString(pMga1->Options, OPTION_HSYNC2))) { 
+            pScrn->monitor->nHsync = StrToRanges(pScrn->monitor->hsync,s);
+        }
+        if ((s = xf86GetOptValString(pMga1->Options, OPTION_VREFRESH2))) { 
+            pScrn->monitor->nVrefresh = StrToRanges(pScrn->monitor->vrefresh,s);
+        }
+    
+    
+    
+   }
+  
+    pMga->SecondCrtc = TRUE;
+    pMga->HWCursor = FALSE;
+    pScrn->AdjustFrame = MGAAdjustMergeFrames;
+    pScrn1->AdjustFrame = MGAAdjustMergeFrames;
+    
+/*    if (!xf86SetDepthBpp(pScrn, 8, 8, 8, flags24))   FIXME:have to copy result form scrn1 
+  if (!xf86SetWeight(pScrn, zeros, zeros)) {
+*/
+
+    /* We use a programamble clock */
+    pScrn->progClock = TRUE;
+
+    /* Collect all of the relevant option flags (fill in pScrn->options) */
+    pScrn->options = pScrn1->options;
+
+/*   xf86ProcessOptions(pScrn->scrnIndex, pScrn->options, pMga->Options);*/
+    pMga->Options = pMga1->Options;
+
+    
+    /* Set the bits per RGB for 8bpp mode */
+    if (pScrn->depth == 8)
+	pScrn->rgbBits = 8;
+
+    /*
+     * Set the Chipset and ChipRev, allowing config file entries to
+     * override.
+     */
+    pScrn->chipset = pScrn1->chipset;
+    pMga->Chipset = pMga1->Chipset;
+    pMga->ChipRev = pMga1->ChipRev;
+
+#ifdef XF86DRI
+    pMga->agpMode = pMga1->agpMode;
+#endif
+
+    pMga->NoAccel = pMga1->NoAccel;
+    pMga->UsePCIRetry = pMga1->UsePCIRetry;
+    pMga->SyncOnGreen = pMga1->SyncOnGreen;
+    pMga->ShowCache = pMga1->ShowCache;
+    pMga->HasSDRAM = pMga1->HasSDRAM;
+    pMga->MemClk = pMga1->MemClk;
+    pMga->Overlay8Plus24 = pMga1->Overlay8Plus24;
+    pMga->colorKey = pMga1->colorKey;
+    pScrn->colorKey = pScrn1->colorKey;
+    pScrn->overlayFlags = pScrn1->overlayFlags;
+    pMga->videoKey = pMga1->videoKey;
+    /* unsupported options */
+    pMga->HWCursor = FALSE;
+    pMga->ShadowFB = FALSE;
+    pMga->FBDev = FALSE;
+    
+    pMga->OverclockMem = pMga1->OverclockMem;
+    pMga->TexturedVideo = pMga1->TexturedVideo;
+    pMga->MergedFB = TRUE;
+
+    pMga->Rotate = 0;
+
+    switch (pMga->Chipset) {
+    case PCI_CHIP_MGA2064:
+    case PCI_CHIP_MGA2164:
+    case PCI_CHIP_MGA2164_AGP:
+	MGA2064SetupFuncs(pScrn);
+	break;
+    case PCI_CHIP_MGA1064:
+    case PCI_CHIP_MGAG100:
+    case PCI_CHIP_MGAG100_PCI:
+    case PCI_CHIP_MGAG200:
+    case PCI_CHIP_MGAG200_PCI:
+    case PCI_CHIP_MGAG400:
+    case PCI_CHIP_MGAG550:
+	MGAGSetupFuncs(pScrn);
+	break;
+    }
+
+    pMga->FbAddress = pMga1->FbAddress;
+    pMga->FbBaseReg = pMga1->FbBaseReg;
+    pMga->PciInfo = pMga1->PciInfo;
+    pMga->IOAddress = pMga1->IOAddress;
+    pMga->ILOADAddress = pMga1->ILOADAddress;
+    pMga->BiosFrom = pMga1->BiosFrom;
+    pMga->BiosAddress = pMga1->BiosAddress;
+
+    /*
+     * Read the BIOS data struct
+     */
+
+    MGAReadBios(pScrn);
+
+    /* HW bpp matches reported bpp */
+    pMga->HwBpp = pMga1->HwBpp;
+
+    /*
+     * Reset card if it isn't primary one
+     */
+    if ( (!pMga->Primary && !pMga->FBDev) || xf86IsPc98() )
+        MGASoftReset(pScrn);
+
+    
+    pScrn->videoRam = pScrn1->videoRam;
+    pMga->FbMapSize = pMga1->FbMapSize;
+    pMga->SrcOrg = pMga1->SrcOrg;
+    pMga->DstOrg = pMga1->DstOrg;
+
+   /* Set the bpp shift value */
+    pMga->BppShifts[0] = 0;
+    pMga->BppShifts[1] = 1;
+    pMga->BppShifts[2] = 0;
+    pMga->BppShifts[3] = 2;
+
+    /*
+     * fill MGAdac struct
+     * Warning: currently, it should be after RAM counting
+     */
+    (*pMga->PreInit)(pScrn);
+
+#if !defined(__powerpc__)
+
+    /* Read and print the Monitor DDC info */
+/*    pScrn->monitor->DDC = MGAdoDDC(pScrn);*/ /*FIXME: have to try this*/
+#endif /* !__powerpc__ */
+
+    /*
+     * If the driver can do gamma correction, it should call xf86SetGamma()
+     * here.
+     */
+    {
+	Gamma zeros = {0.0, 0.0, 0.0};
+
+	if (!xf86SetGamma(pScrn, zeros)) {
+	    return FALSE;
+	}
+    }
+
+
+    /* Set the min pixel clock */
+    pMga->MinClock = pMga1->MinClock;	/* XXX Guess, need to check this */
+    xf86DrvMsg(pScrn->scrnIndex, X_DEFAULT, "CRTC2: Min pixel clock is %d MHz\n",
+	       pMga->MinClock / 1000);
+   /* Override on 2nd crtc */
+
+    if (pMga->ChipRev >= 0x80) {	/* G450 */
+        pMga->MaxClock = 234000;
+    } else {
+        pMga->MaxClock = 135000;
+    }
+    xf86DrvMsg(pScrn->scrnIndex, X_DEFAULT, "CRTC2: Max pixel clock is %d MHz\n",
+	       pMga->MaxClock / 1000);
+    /*
+     * Setup the ClockRanges, which describe what clock ranges are available,
+     * and what sort of modes they can be used for.
+     */
+    clockRanges = xnfcalloc(sizeof(ClockRange), 1);
+    clockRanges->next = NULL;
+    clockRanges->minClock = pMga->MinClock;
+    clockRanges->maxClock = pMga->MaxClock;
+    clockRanges->clockIndex = -1;		/* programmable */
+    clockRanges->interlaceAllowed = TRUE;
+    clockRanges->doubleScanAllowed = TRUE;
+#ifdef USEMGAHAL
+    MGA_HAL(clockRanges->interlaceAllowed = FALSE);
+    MGA_HAL(clockRanges->doubleScanAllowed = FALSE);
+#endif
+    clockRanges->interlaceAllowed = FALSE; /*no interlace on CRTC2 */
+
+    clockRanges->ClockMulFactor = 1;
+    clockRanges->ClockDivFactor = 1;
+    /* Only set MemClk if appropriate for the ramdac */
+    if (pMga->Dac.SetMemClk) {
+	if (pMga->MemClk == 0) {
+	    pMga->MemClk = pMga->Dac.MemoryClock;
+	    from = pMga->Dac.MemClkFrom;
+	} else
+	    from = X_CONFIG;
+	xf86DrvMsg(pScrn->scrnIndex, from, "CRTC2: MCLK used is %.1f MHz\n",
+		   pMga->MemClk / 1000.0);
+    }
+
+    /*
+     * xf86ValidateModes will check that the mode HTotal and VTotal values
+     * don't exceed the chipset's limit if pScrn->maxHValue and
+     * pScrn->maxVValue are set.  Since our MGAValidMode() already takes
+     * care of this, we don't worry about setting them here.
+     */
+    {
+	int Pitches1[] =
+	  {640, 768, 800, 960, 1024, 1152, 1280, 1600, 1920, 2048, 0};
+	int Pitches2[] =
+	  {512, 640, 768, 800, 832, 960, 1024, 1152, 1280, 1600, 1664,
+		1920, 2048, 0};
+	int *linePitches = NULL;
+	int minPitch = 256;
+	int maxPitch = 2048;
+
+        switch(pMga->Chipset) {
+	case PCI_CHIP_MGA2064:
+	   if (!pMga->NoAccel) {
+		linePitches = xalloc(sizeof(Pitches1));
+		memcpy(linePitches, Pitches1, sizeof(Pitches1));
+		minPitch = maxPitch = 0;
+	   }
+	   break;
+	case PCI_CHIP_MGA2164:
+	case PCI_CHIP_MGA2164_AGP:
+	case PCI_CHIP_MGA1064:
+	   if (!pMga->NoAccel) {
+		linePitches = xalloc(sizeof(Pitches2));
+		memcpy(linePitches, Pitches2, sizeof(Pitches2));
+		minPitch = maxPitch = 0;
+	   }
+	   break;
+	case PCI_CHIP_MGAG100:
+	case PCI_CHIP_MGAG100_PCI:
+	   maxPitch = 2048;
+	   break;
+	case PCI_CHIP_MGAG200:
+	case PCI_CHIP_MGAG200_PCI:
+	case PCI_CHIP_MGAG400:
+	case PCI_CHIP_MGAG550:
+	   maxPitch = 4096;
+	   break;
+	}
+
+        pScrn->modePool=NULL;
+        pScrn->modes = NULL;
+	i = xf86ValidateModes(pScrn, pScrn->monitor->Modes,
+			      pScrn->display->modes, clockRanges,
+			      linePitches, minPitch, maxPitch,
+			      pMga->Roundings[(pScrn->bitsPerPixel >> 3) - 1] *
+					pScrn->bitsPerPixel, 128, 2048,
+			      pScrn->display->virtualX,
+			      pScrn->display->virtualY,
+			      pMga->FbMapSize,
+			      LOOKUP_BEST_REFRESH);
+        
+	if (linePitches)
+	   xfree(linePitches);
+    }
+
+
+    if (i < 1 && pMga->FBDev) {
+	fbdevHWUseBuildinMode(pScrn);
+	pScrn->displayWidth = pScrn->virtualX; /* FIXME: might be wrong */
+	i = 1;
+    }
+    if (i == -1) {
+	xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "CRTC2: Validate Modes Failed\n");
+	MGAFreeRec(pScrn);
+	return FALSE;
+    }
+
+    /* Prune the modes marked as invalid */
+    xf86PruneDriverModes(pScrn);
+
+    if (i == 0 || pScrn->modes == NULL) {
+	xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "CRTC2: No valid modes found\n");
+	MGAFreeRec(pScrn);
+	return FALSE;
+    }
+#ifdef USEMGAHAL
+    MGA_HAL(
+
+    pMga->pBoard = pMga1->pBoard;
+    pMga->pClientStruct = pMga1->pClientStruct;
+    pMga->pMgaHwInfo = pMga1->pMgaHwInfo;
+
+
+    MGAFillModeInfoStruct(pScrn,NULL);
+    /* Fields usually handled by MGAFillModeInfoStruct, but are unavailable
+     * because no mode is given
+     */
+    pMga->pMgaModeInfo->ulDispWidth = pScrn->virtualX;
+    pMga->pMgaModeInfo->ulDispHeight = pScrn->virtualY;
+    
+    if((status = MGAValidateMode(pMga->pBoard,pMga->pMgaModeInfo)) != 0) {
+	xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
+		   "MGAValidateMode from HALlib found the mode to be invalid.\n"
+		   "\tError: 0x%lx\n", status);
+        return FALSE;
+    }
+    pScrn->displayWidth = pMga->pMgaModeInfo->ulFBPitch;
+    );	/* MGA_HAL */
+#endif
+
+    /*
+     * Set the CRTC parameters for all of the modes based on the type
+     * of mode, and the chipset's interlace requirements.
+     *
+     * Calling this is required if the mode->Crtc* values are used by the
+     * driver and if the driver doesn't provide code to set them.  They
+     * are not pre-initialised at all.
+     */
+#ifdef USEMGAHAL
+    MGA_HAL(xf86SetCrtcForModes(pScrn, 0));
+#endif
+    MGA_NOT_HAL(xf86SetCrtcForModes(pScrn, INTERLACE_HALVE_V));
+
+    /* Set the current mode to the first in the list */
+    pScrn->currentMode = pScrn->modes;
+
+    /* Print the list of modes being used */
+    xf86PrintModes(pScrn);
+
+    /* Set display resolution */
+    xf86SetDpi(pScrn, 0, 0);
+
+    /*
+     * Compute the byte offset into the linear frame buffer where the
+     * frame buffer data should actually begin.  According to DDK misc.c
+     * line 1023, if more than 4MB is to be displayed, YDSTORG must be set
+     * appropriately to align memory bank switching, and this requires a
+     * corresponding offset on linear frame buffer access.
+     * This is only needed for WRAM.
+     */
+
+    pMga->YDstOrg = pMga1->YDstOrg; 
+    xf86DrvMsgVerb(pScrn->scrnIndex, X_INFO, 2, "CRTC2: YDstOrg is set to %d\n",
+		   pMga->YDstOrg);
+    pMga->FbUsableSize = pMga1->FbUsableSize;
+    pMga->FbCursorOffset = pMga1->FbCursorOffset;
+
+    pMga->CurrentLayout.bitsPerPixel = pScrn->bitsPerPixel;
+    pMga->CurrentLayout.depth = pScrn->depth;
+    pMga->CurrentLayout.displayWidth = pScrn->displayWidth;
+    pMga->CurrentLayout.weight.red = pScrn->weight.red;
+    pMga->CurrentLayout.weight.green = pScrn->weight.green;
+    pMga->CurrentLayout.weight.blue = pScrn->weight.blue;
+    pMga->CurrentLayout.Overlay8Plus24 = pMga->Overlay8Plus24;
+    pMga->CurrentLayout.mode = pScrn->currentMode;
+
+
+    Monitor2Pos = mgaRightOf;
+    if ((s = xf86GetOptValString(pMga1->Options, OPTION_MONITOR2POS))) {
+        switch(s[0]) {
+            case 'L': case 'l': case 'G': case 'g':
+                Monitor2Pos = mgaLeftOf;
+                break;
+            case 'R': case 'r': case 'D': case 'd':
+                Monitor2Pos = mgaRightOf;
+                break;
+
+            case 'A': case 'a': case 'H': case 'h':
+                Monitor2Pos = mgaAbove;
+                break;
+
+            case 'B': case 'b':
+                Monitor2Pos = mgaBelow;
+                break;
+
+            case 'C': case 'c':
+                Monitor2Pos = mgaClone;
+                break;
+            default:
+                Monitor2Pos = mgaRightOf;
+                break;
+        } 
+    }
+
+    /* Fool xf86 into thinking we have huge modes */
+    /* Keep the original values somewhere */
+    pMga1->M1modes = pScrn1->modes;
+    pMga1->M1currentMode = pScrn1->currentMode;
+    /* make a copy of the mode list, so we can modify it. */
+    if ((s = xf86GetOptValString(pMga1->Options, OPTION_METAMODES))) {
+        pScrn1->modes = GenerateModeList(pScrn,s,pMga1->M1modes,pScrn->modes,Monitor2Pos); /*FIXME: free this list*/
+        if(!pScrn1->modes) {
+	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "Parse Error reading MetaModes, or No modes left.\n");
+            return FALSE;
+        }
+            
+        pScrn1->modes = pScrn1->modes->next;
+        pScrn1->currentMode = pScrn1->modes;
+    } else {
+        xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "MetaModes option missing.\n");
+        return FALSE;
+    }
+    xf86DrvMsg(pScrn1->scrnIndex, X_INFO, "==== End of second screen initialization ====\n");
+    return TRUE;
+}
+
+void
+MGADisplayPowerManagementSetMerged(ScrnInfoPtr pScrn, int PowerManagementMode,
+				  int flags)
+{
+    MGADisplayPowerManagementSet(pScrn,PowerManagementMode,flags);
+    MGADisplayPowerManagementSetCrtc2(pScrn,PowerManagementMode,flags);
+}
+
+typedef struct _region {
+    int x0,x1,y0,y1;
+    } region;
+
+static Bool
+InRegion(int x, int y, region r) {
+    return (r.x0 <= x) && (x < r.x1) && (r.y0 <= y) && (y < r.y1);
+}
+
+
+#define BOUND(test,low,hi) { \
+    if(test < low) test = low; \
+    if(test > hi) test = hi; }
+#define REBOUND(low,hi,test) { \
+    if(test < low) { \
+        hi += test-low; \
+        low = test; } \
+    if(test > hi) { \
+        low += test-hi; \
+        hi = test; } }
+ void 
+MGAMergePointerMoved(int scrnIndex, int x, int y)
+{
+  ScrnInfoPtr   pScr = xf86Screens[scrnIndex];
+  MGAPtr        pMga = MGAPTR(pScr);
+  ScrnInfoPtr   pScr2 = pMga->pScrn2;
+
+  region out,in1,in2,f2,f1;
+
+  int deltax,deltay;
+
+  /* for ease. */
+  f1.x0 = pMga->M1frameX0;
+  f1.x1 = pMga->M1frameX1+1;
+  f1.y0 = pMga->M1frameY0;
+  f1.y1 = pMga->M1frameY1+1;
+  f2.x0 = pScr2->frameX0;
+  f2.x1 = pScr2->frameX1+1;
+  f2.y0 = pScr2->frameY0;
+  f2.y1 = pScr2->frameY1+1;
+
+
+  /*specify outer clipping region. crossing this causes all frames to move*/
+  out.x0 = pScr->frameX0;
+  out.x1 = pScr->frameX1+1;
+  out.y0 = pScr->frameY0;
+  out.y1 = pScr->frameY1+1;
+
+  /* 
+   * specify inner sliding window. beeing outsize both frames, and inside 
+   * the outer cliping window, causes corresponding frame to slide
+   */
+  in1 = out;
+  in2 = out;
+  switch(((MergedDisplayModePtr)pScr->currentMode->Private)->Monitor2Pos) {
+      case mgaLeftOf : 
+          in1.x0 = f1.x0; 
+          in2.x1 = f2.x1; 
+          break;
+      case mgaRightOf : 
+          in1.x1 = f1.x1; 
+          in2.x0 = f2.x0; 
+          break;
+      case mgaBelow : 
+          in1.y1 = f1.y1; 
+          in2.y0 = f2.y0; 
+          break;
+      case mgaAbove : 
+          in1.y0 = f1.y0; 
+          in2.y1 = f2.y1; 
+          break;
+      case mgaClone : 
+          break;
+      }
+
+  
+    deltay = 0;
+    deltax = 0;
+  
+    if(InRegion(x,y,out)) {
+        if( InRegion(x,y, in1) && !InRegion(x,y, f1) ) {
+            REBOUND(f1.x0,f1.x1,x);
+            REBOUND(f1.y0,f1.y1,y);
+            deltax = 1; /*force frame update */
+        }
+        if( InRegion(x,y, in2) && !InRegion(x,y, f2) ) {
+            REBOUND(f2.x0,f2.x1,x);
+            REBOUND(f2.y0,f2.y1,y);
+            deltax = 1; /*force frame update */
+        }
+    }
+    else {  /*outside outer clipping region*/
+        if ( out.x0 > x) { 
+            deltax = x - out.x0;
+        }
+        if ( out.x1 < x) { 
+            deltax = x - out.x1;
+        }
+        f1.x0 += deltax;
+        f1.x1 += deltax;
+        f2.x0 += deltax;
+        f2.x1 += deltax;
+        pScr->frameX0 += deltax;
+        pScr->frameX1 += deltax;
+        
+
+        if ( out.y0 > y) { 
+            deltay = y - out.y0;
+        }
+        if ( out.y1 < y) { 
+            deltay = y - out.y1;
+        }
+        f1.y0 += deltay;
+        f1.y1 += deltay;
+        f2.y0 += deltay;
+        f2.y1 += deltay;
+        pScr->frameY0 += deltay;
+        pScr->frameY1 += deltay;
+    } 
+
+    
+    if (deltax != 0 || deltay != 0) {
+        /* back to reality. */
+        pMga->M1frameX0 = f1.x0; 
+        pMga->M1frameY0 = f1.y0;
+        pScr2->frameX0 = f2.x0;
+        pScr2->frameY0 = f2.y0;
+
+        /*Adjust Granularity */
+        MGAAdjustGranularity(pScr,&pMga->M1frameX0,&pMga->M1frameY0);
+        MGAAdjustGranularity(pScr,&pScr2->frameX0,&pScr2->frameY0);
+        MGAAdjustGranularity(pScr,&pScr->frameX0,&pScr->frameY0);
+        
+        pMga->M1frameX1 = pMga->M1frameX0 + MDMPTR(pScr)->Monitor1->HDisplay -1;
+        pMga->M1frameY1 = pMga->M1frameY0 + MDMPTR(pScr)->Monitor1->VDisplay -1;
+        pScr2->frameX1 = pScr2->frameX0 + MDMPTR(pScr)->Monitor2->HDisplay -1;
+        pScr2->frameY1 = pScr2->frameY0 + MDMPTR(pScr)->Monitor2->VDisplay -1;
+        pScr->frameX1 = pScr->frameX0 + pScr->currentMode->HDisplay -1;
+        pScr->frameY1 = pScr->frameY0 + pScr->currentMode->VDisplay -1;
+        
+        MGAAdjustFrame(pScr->scrnIndex, pMga->M1frameX0, pMga->M1frameY0, 0);
+        MGAAdjustFrameCrtc2(pScr->scrnIndex, pScr2->frameX0, pScr2->frameY0, 0);
+    }
+
+/*  if(pMga->PointerMoved)  
+      (*pMga->PointerMoved)(scrnIndex, x, y);  FIXME: do I need to call old func?*/
+
+}
+
+   
+void
+MGAAdjustMergeFrames(int scrnIndex, int x, int y, int flags) {
+    ScrnInfoPtr pScrn1 = xf86Screens[scrnIndex];
+    MGAPtr pMga = MGAPTR(pScrn1); 
+    ScrnInfoPtr pScrn2 = pMga->pScrn2;
+    int VTotal = pScrn1->currentMode->VDisplay; 
+    int HTotal = pScrn1->currentMode->HDisplay; 
+    int VMax = VTotal;
+    int HMax = HTotal;
+
+    BOUND(x,0,pScrn1->virtualX-HTotal);
+    BOUND(y,0,pScrn1->virtualY-VTotal); 
+    switch(MDMPTR(pScrn1)->Monitor2Pos) {
+        case mgaLeftOf:
+            pScrn2->frameX0 = x;
+            BOUND(pScrn2->frameY0,y,y + VMax - MDMPTR(pScrn1)->Monitor2->VDisplay);
+            pMga->M1frameX0 = x+MDMPTR(pScrn1)->Monitor2->HDisplay;
+            BOUND(pMga->M1frameY0,y,y + VMax - MDMPTR(pScrn1)->Monitor1->VDisplay);
+            break;
+        case mgaRightOf:
+            pMga->M1frameX0 = x;
+            BOUND(pMga->M1frameY0,y,y + VMax - MDMPTR(pScrn1)->Monitor1->VDisplay);
+            pScrn2->frameX0 = x+MDMPTR(pScrn1)->Monitor1->HDisplay;
+            BOUND(pScrn2->frameY0,y,y + VMax - MDMPTR(pScrn1)->Monitor2->VDisplay);
+            break;
+        case mgaAbove:
+            BOUND(pScrn2->frameX0,x,x + HMax - MDMPTR(pScrn1)->Monitor2->HDisplay);
+            pScrn2->frameY0 = y;
+            BOUND(pMga->M1frameX0,x,x + HMax - MDMPTR(pScrn1)->Monitor1->HDisplay);
+            pMga->M1frameY0 = y+MDMPTR(pScrn1)->Monitor2->VDisplay;
+            break;
+        case mgaBelow:
+            BOUND(pMga->M1frameX0,x,x + HMax - MDMPTR(pScrn1)->Monitor1->HDisplay);
+            pMga->M1frameY0 = y;
+            BOUND(pScrn2->frameX0,x,x + HMax - MDMPTR(pScrn1)->Monitor2->HDisplay);
+            pScrn2->frameY0 = y+MDMPTR(pScrn1)->Monitor1->VDisplay;
+            break;
+        case mgaClone:
+            BOUND(pMga->M1frameX0,x,x + HMax - MDMPTR(pScrn1)->Monitor1->HDisplay);
+            BOUND(pMga->M1frameY0,y,y + VMax - MDMPTR(pScrn1)->Monitor1->VDisplay);
+            BOUND(pScrn2->frameX0,x,x + HMax - MDMPTR(pScrn1)->Monitor2->HDisplay);
+            BOUND(pScrn2->frameY0,y,y + VMax - MDMPTR(pScrn1)->Monitor2->VDisplay);
+            break;
+    }
+    /* sanity checks. Make shure were not out of bounds */
+    BOUND(pMga->M1frameX0,0,pScrn1->virtualX -MDMPTR(pScrn1)->Monitor1->HDisplay);
+    BOUND(pMga->M1frameY0,0,pScrn1->virtualY -MDMPTR(pScrn1)->Monitor1->VDisplay);
+    BOUND(pScrn2->frameX0,0,pScrn2->virtualX -MDMPTR(pScrn1)->Monitor2->HDisplay);
+    BOUND(pScrn2->frameY0,0,pScrn2->virtualY -MDMPTR(pScrn1)->Monitor2->VDisplay);
+    
+    pScrn1->frameX0 = x;
+    pScrn1->frameY0 = y;
+    
+    /* check granularity */
+    MGAAdjustGranularity(pScrn1,&pMga->M1frameX0,&pMga->M1frameY0);
+    MGAAdjustGranularity(pScrn1,&pScrn2->frameX0,&pScrn2->frameY0);
+    MGAAdjustGranularity(pScrn1,&pScrn1->frameX0,&pScrn1->frameY0);
+    
+    /* complete shitty redundant info */
+    pMga->M1frameX1 = pMga->M1frameX0 + MDMPTR(pScrn1)->Monitor1->HDisplay -1;
+    pMga->M1frameY1 = pMga->M1frameY0 + MDMPTR(pScrn1)->Monitor1->VDisplay -1;
+    pScrn2->frameX1 = pScrn2->frameX0 + MDMPTR(pScrn1)->Monitor2->HDisplay -1;
+    pScrn2->frameY1 = pScrn2->frameY0 + MDMPTR(pScrn1)->Monitor2->VDisplay -1;
+    pScrn1->frameX1 = pScrn1->frameX0 + pScrn1->currentMode->HDisplay -1;
+    pScrn1->frameY1 = pScrn1->frameY0 + pScrn1->currentMode->VDisplay -1;
+
+    MGAAdjustFrame(scrnIndex, pMga->M1frameX0, pMga->M1frameY0, flags);
+    MGAAdjustFrameCrtc2(scrnIndex, pScrn2->frameX0, pScrn2->frameY0, flags);
+    return;
+}
+
+Bool
+MGACloseScreenMerged(int scrnIndex, ScreenPtr pScreen) {
+    ScrnInfoPtr pScrn1 = xf86Screens[scrnIndex];
+    MGAPtr pMga = MGAPTR(pScrn1); 
+    ScrnInfoPtr pScrn2 = pMga->pScrn2;
+
+    if(pScrn2) {
+        xfree(pScrn2->monitor);
+        pScrn2->monitor = NULL;
+
+        xfree(pScrn2);
+        pMga->pScrn2 = NULL;
+    }
+
+    if(pScrn1->modes) {
+        pScrn1->currentMode = pScrn1->modes;
+        do {
+            DisplayModePtr p = pScrn1->currentMode->next; 
+            if(pScrn1->currentMode->Private) 
+                xfree(pScrn1->currentMode->Private);
+            xfree(pScrn1->currentMode);
+            pScrn1->currentMode = p;
+        }while( pScrn1->currentMode != pScrn1->modes);
+    }
+ 
+    pScrn1->currentMode = pMga->M1currentMode;
+    pScrn1->modes = pMga->M1modes;
+        
+    return TRUE;       
+}
+
+Bool
+MGASaveScreenMerged(ScreenPtr pScreen, int mode)
+{
+    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+    MGAPtr pMga = MGAPTR(pScrn); 
+    BOOL on = xf86IsUnblank(mode);
+    CARD8 reg;
+    
+    if (on) {
+/*        SetTimdeSinceLastInputEvent();*/
+       
+        /* power on Dac1 */
+        reg = inMGAdac(0x1E);
+	outMGAdac(0x1E, reg | 1);
+        /* power on Dac2 */
+        reg = inMGAdac(0xA0);
+	outMGAdac(0xA0, reg | 1);
+        
+    } else {
+        /* power off Dac1 */
+        reg = inMGAdac(0x1E);
+	outMGAdac(0x1E, reg & ~1);
+        /* power off Dac2 */
+        reg = inMGAdac(0xA0);
+	outMGAdac(0xA0, reg & ~1);
+
+    }
+    return TRUE;
+}
+
+