Merge remote-tracking branch 'origin/released'

Conflicts:
	xorg-server/dix/dispatch.c
	xorg-server/include/misc.h

17 files changed, 806 insertions, 45 deletions

diff --git a/xorg-server/hw/xfree86/common/Makefile.am b/xorg-server/hw/xfree86/common/Makefile.am
index 27921777d..65d98e694 100644
--- a/xorg-server/hw/xfree86/common/Makefile.am
+++ b/xorg-server/hw/xfree86/common/Makefile.am
@@ -22,9 +22,13 @@ if DGA
 DGASOURCES = xf86DGA.c
 endif
 
+if XORG_BUS_PLATFORM
+PLATSOURCES = xf86platformBus.c
+endif
+
 RANDRSOURCES = xf86RandR.c
 
-BUSSOURCES = xf86fbBus.c xf86noBus.c $(PCI_SOURCES) $(SBUS_SOURCES)
+BUSSOURCES = xf86fbBus.c xf86noBus.c $(PCI_SOURCES) $(SBUS_SOURCES) $(PLATSOURCES)
 
 MODEDEFSOURCES = $(srcdir)/vesamodes $(srcdir)/extramodes
 
@@ -56,7 +60,7 @@ sdk_HEADERS = compiler.h fourcc.h xf86.h xf86Module.h xf86Opt.h \
               xf86PciInfo.h xf86Priv.h xf86Privstr.h \
               xf86cmap.h xf86fbman.h xf86str.h xf86Xinput.h xisb.h \
               $(XVSDKINCS) $(XF86VMODE_SDK) xorgVersion.h \
-              xf86sbusBus.h xf86VGAarbiter.h xf86Optionstr.h
+              xf86sbusBus.h xf86VGAarbiter.h xf86Optionstr.h xf86platformBus.h
 
 DISTCLEANFILES = xf86Build.h
 CLEANFILES = $(BUILT_SOURCES)
diff --git a/xorg-server/hw/xfree86/common/xf86.h b/xorg-server/hw/xfree86/common/xf86.h
index 129660d81..61169857f 100644
--- a/xorg-server/hw/xfree86/common/xf86.h
+++ b/xorg-server/hw/xfree86/common/xf86.h
@@ -71,6 +71,11 @@ extern _X_EXPORT Bool fbSlotClaimed;
 #if (defined(__sparc__) || defined(__sparc)) && !defined(__OpenBSD__)
 extern _X_EXPORT Bool sbusSlotClaimed;
 #endif
+
+#if defined(XSERVER_PLATFORM_BUS)
+extern _X_EXPORT int platformSlotClaimed;
+#endif
+
 extern _X_EXPORT confDRIRec xf86ConfigDRI;
 extern _X_EXPORT Bool xf86DRI2Enabled(void);
 
@@ -460,4 +465,7 @@ extern _X_EXPORT ScreenPtr xf86ScrnToScreen(ScrnInfoPtr pScrn);
 
 #define XF86_SCRN_INTERFACE 1 /* define for drivers to use in api compat */
 
+/* flags passed to xf86 allocate screen */
+#define XF86_ALLOCATE_GPU_SCREEN 1
+
 #endif                          /* _XF86_H */
diff --git a/xorg-server/hw/xfree86/common/xf86AutoConfig.c b/xorg-server/hw/xfree86/common/xf86AutoConfig.c
index d0eb0affb..271ce86b6 100644
--- a/xorg-server/hw/xfree86/common/xf86AutoConfig.c
+++ b/xorg-server/hw/xfree86/common/xf86AutoConfig.c
@@ -198,10 +198,13 @@ listPossibleVideoDrivers(char *matches[], int nmatches)
     }
     i = 0;
 
+#ifdef XSERVER_PLATFORM_BUS
+    i = xf86PlatformMatchDriver(matches, nmatches);
+#endif
 #ifdef sun
     /* Check for driver type based on /dev/fb type and if valid, use
        it instead of PCI bus probe results */
-    if (xf86Info.consoleFd >= 0) {
+    if (xf86Info.consoleFd >= 0 && (i < (nmatches - 1))) {
         struct vis_identifier visid;
         const char *cp;
         extern char xf86SolarisFbDev[PATH_MAX];
@@ -251,6 +254,7 @@ listPossibleVideoDrivers(char *matches[], int nmatches)
     }
 #endif
 #ifdef __sparc__
+    if (i < (nmatches - 1))
     {
         char *sbusDriver = sparcDriverName();
 
@@ -259,7 +263,8 @@ listPossibleVideoDrivers(char *matches[], int nmatches)
     }
 #endif
 #ifdef XSERVER_LIBPCIACCESS
-    i = xf86PciMatchDriver(matches, nmatches);
+    if (i < (nmatches - 1))
+        i = xf86PciMatchDriver(matches, nmatches);
 #endif
     /* Fallback to platform default hardware */
     if (i < (nmatches - 1)) {
diff --git a/xorg-server/hw/xfree86/common/xf86Bus.c b/xorg-server/hw/xfree86/common/xf86Bus.c
index 6c86f5e26..6de8409fc 100644
--- a/xorg-server/hw/xfree86/common/xf86Bus.c
+++ b/xorg-server/hw/xfree86/common/xf86Bus.c
@@ -77,8 +77,14 @@ xf86CallDriverProbe(DriverPtr drv, Bool detect_only)
 {
     Bool foundScreen = FALSE;
 
+#ifdef XSERVER_PLATFORM_BUS
+    if (drv->platformProbe != NULL) {
+        foundScreen = xf86platformProbeDev(drv);
+    }
+#endif
+
 #ifdef XSERVER_LIBPCIACCESS
-    if (drv->PciProbe != NULL) {
+    if (!foundScreen && (drv->PciProbe != NULL)) {
         if (xf86DoConfigure && xf86DoConfigurePass1) {
             assert(detect_only);
             foundScreen = xf86PciAddMatchingDev(drv);
@@ -183,6 +189,10 @@ xf86BusConfig(void)
         }
     }
 
+    /* bind GPU conf screen to protocol screen 0 */
+    for (i = 0; i < xf86NumGPUScreens; i++)
+        xf86GPUScreens[i]->confScreen = xf86Screens[0]->confScreen;
+
     /* If no screens left, return now.  */
     if (xf86NumScreens == 0) {
         xf86Msg(X_ERROR,
@@ -202,6 +212,9 @@ xf86BusConfig(void)
 void
 xf86BusProbe(void)
 {
+#ifdef XSERVER_PLATFORM_BUS
+    xf86platformProbe();
+#endif
 #ifdef XSERVER_LIBPCIACCESS
     xf86PciProbe();
 #endif
@@ -238,6 +251,8 @@ StringToBusType(const char *busID, const char **retID)
         ret = BUS_PCI;
     if (!xf86NameCmp(p, "sbus"))
         ret = BUS_SBUS;
+    if (!xf86NameCmp(p, "platform"))
+        ret = BUS_PLATFORM;
     if (ret != BUS_NONE)
         if (retID)
             *retID = busID + strlen(p) + 1;
@@ -270,6 +285,8 @@ xf86IsEntityPrimary(int entityIndex)
         return pEnt->bus.id.pci == primaryBus.id.pci;
     case BUS_SBUS:
         return pEnt->bus.id.sbus.fbNum == primaryBus.id.sbus.fbNum;
+    case BUS_PLATFORM:
+        return pEnt->bus.id.plat == primaryBus.id.plat;
     default:
         return FALSE;
     }
@@ -541,6 +558,9 @@ xf86PostProbe(void)
 #if (defined(__sparc__) || defined(__sparc)) && !defined(__OpenBSD__)
                              sbusSlotClaimed ||
 #endif
+#ifdef XSERVER_PLATFORM_BUS
+                             platformSlotClaimed ||
+#endif
 #ifdef XSERVER_LIBPCIACCESS
                              pciSlotClaimed
 #else
diff --git a/xorg-server/hw/xfree86/common/xf86Bus.h b/xorg-server/hw/xfree86/common/xf86Bus.h
index abf2efd1a..e83ba780a 100644
--- a/xorg-server/hw/xfree86/common/xf86Bus.h
+++ b/xorg-server/hw/xfree86/common/xf86Bus.h
@@ -42,6 +42,7 @@
 #if defined(__sparc__) || defined(__sparc)
 #include "xf86sbusBus.h"
 #endif
+#include "xf86platformBus.h"
 
 typedef struct {
     DriverPtr driver;
diff --git a/xorg-server/hw/xfree86/common/xf86Config.c b/xorg-server/hw/xfree86/common/xf86Config.c
index 3ec40fe9b..6b806a372 100644
--- a/xorg-server/hw/xfree86/common/xf86Config.c
+++ b/xorg-server/hw/xfree86/common/xf86Config.c
@@ -712,7 +712,8 @@ typedef enum {
     FLAG_AUTO_ENABLE_DEVICES,
     FLAG_GLX_VISUALS,
     FLAG_DRI2,
-    FLAG_USE_SIGIO
+    FLAG_USE_SIGIO,
+    FLAG_AUTO_ADD_GPU,
 } FlagValues;
 
 /**
@@ -770,6 +771,8 @@ static OptionInfoRec FlagOptions[] = {
      {0}, FALSE},
     {FLAG_USE_SIGIO, "UseSIGIO", OPTV_BOOLEAN,
      {0}, FALSE},
+    {FLAG_AUTO_ADD_GPU, "AutoAddGPU", OPTV_BOOLEAN,
+     {0}, FALSE},
     {-1, NULL, OPTV_NONE,
      {0}, FALSE},
 };
@@ -862,6 +865,16 @@ configServerFlags(XF86ConfFlagsPtr flagsconf, XF86OptionPtr layoutopts)
     xf86Msg(from, "%sutomatically enabling devices\n",
             xf86Info.autoEnableDevices ? "A" : "Not a");
 
+    if (xf86IsOptionSet(FlagOptions, FLAG_AUTO_ADD_GPU)) {
+        xf86GetOptValBool(FlagOptions, FLAG_AUTO_ADD_GPU,
+                          &xf86Info.autoAddGPU);
+        from = X_CONFIG;
+    }
+    else {
+        from = X_DEFAULT;
+    }
+    xf86Msg(from, "%sutomatically adding GPU devices\n",
+            xf86Info.autoAddGPU ? "A" : "Not a");
     /*
      * Set things up based on the config file information.  Some of these
      * settings may be overridden later when the command line options are
diff --git a/xorg-server/hw/xfree86/common/xf86Globals.c b/xorg-server/hw/xfree86/common/xf86Globals.c
index 0071004eb..7df7a80c4 100644
--- a/xorg-server/hw/xfree86/common/xf86Globals.c
+++ b/xorg-server/hw/xfree86/common/xf86Globals.c
@@ -51,6 +51,7 @@ DevPrivateKeyRec xf86CreateRootWindowKeyRec;
 DevPrivateKeyRec xf86ScreenKeyRec;
 
 ScrnInfoPtr *xf86Screens = NULL;        /* List of ScrnInfos */
+ScrnInfoPtr *xf86GPUScreens = NULL;        /* List of ScrnInfos */
 
 const unsigned char byte_reversed[256] = {
     0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
@@ -125,11 +126,16 @@ xf86InfoRec xf86Info = {
 #if defined(CONFIG_HAL) || defined(CONFIG_UDEV) || defined(CONFIG_WSCONS)
     .forceInputDevices = FALSE,
     .autoAddDevices = TRUE,
-    .autoEnableDevices = TRUE
+    .autoEnableDevices = TRUE,
 #else
     .forceInputDevices = TRUE,
     .autoAddDevices = FALSE,
-    .autoEnableDevices = FALSE
+    .autoEnableDevices = FALSE,
+#endif
+#if defined(CONFIG_UDEV_KMS)
+    .autoAddGPU = TRUE,
+#else
+    .autoAddGPU = FALSE,
 #endif
 };
 
@@ -153,6 +159,7 @@ int xf86NumDrivers = 0;
 InputDriverPtr *xf86InputDriverList = NULL;
 int xf86NumInputDrivers = 0;
 int xf86NumScreens = 0;
+int xf86NumGPUScreens = 0;
 
 const char *xf86VisualNames[] = {
     "StaticGray",
diff --git a/xorg-server/hw/xfree86/common/xf86Helper.c b/xorg-server/hw/xfree86/common/xf86Helper.c
index 5ef1dabfb..f681a8577 100644
--- a/xorg-server/hw/xfree86/common/xf86Helper.c
+++ b/xorg-server/hw/xfree86/common/xf86Helper.c
@@ -167,29 +167,43 @@ ScrnInfoPtr
 xf86AllocateScreen(DriverPtr drv, int flags)
 {
     int i;
+    ScrnInfoPtr pScrn;
 
-    if (xf86Screens == NULL)
-        xf86NumScreens = 0;
-
-    i = xf86NumScreens++;
-    xf86Screens = xnfrealloc(xf86Screens, xf86NumScreens * sizeof(ScrnInfoPtr));
-    xf86Screens[i] = xnfcalloc(sizeof(ScrnInfoRec), 1);
-    xf86Screens[i]->scrnIndex = i;      /* Changes when a screen is removed */
-    xf86Screens[i]->origIndex = i;      /* This never changes */
-    xf86Screens[i]->privates = xnfcalloc(sizeof(DevUnion),
-                                         xf86ScrnInfoPrivateCount);
+    if (flags & XF86_ALLOCATE_GPU_SCREEN) {
+        if (xf86GPUScreens == NULL)
+            xf86NumGPUScreens = 0;
+        i = xf86NumGPUScreens++;
+        xf86GPUScreens = xnfrealloc(xf86GPUScreens, xf86NumGPUScreens * sizeof(ScrnInfoPtr));
+        xf86GPUScreens[i] = xnfcalloc(sizeof(ScrnInfoRec), 1);
+        pScrn = xf86GPUScreens[i];
+        pScrn->scrnIndex = i + GPU_SCREEN_OFFSET;      /* Changes when a screen is removed */
+        pScrn->is_gpu = TRUE;
+    } else {
+        if (xf86Screens == NULL)
+            xf86NumScreens = 0;
+
+        i = xf86NumScreens++;
+        xf86Screens = xnfrealloc(xf86Screens, xf86NumScreens * sizeof(ScrnInfoPtr));
+        xf86Screens[i] = xnfcalloc(sizeof(ScrnInfoRec), 1);
+        pScrn = xf86Screens[i];
+
+        pScrn->scrnIndex = i;      /* Changes when a screen is removed */
+    }
+
+    pScrn->origIndex = pScrn->scrnIndex;      /* This never changes */
+    pScrn->privates = xnfcalloc(sizeof(DevUnion), xf86ScrnInfoPrivateCount);
     /*
      * EnableDisableFBAccess now gets initialized in InitOutput()
-     * xf86Screens[i]->EnableDisableFBAccess = xf86EnableDisableFBAccess;
+     * pScrn->EnableDisableFBAccess = xf86EnableDisableFBAccess;
      */
 
-    xf86Screens[i]->drv = drv;
+    pScrn->drv = drv;
     drv->refCount++;
-    xf86Screens[i]->module = DuplicateModule(drv->module, NULL);
+    pScrn->module = DuplicateModule(drv->module, NULL);
 
-    xf86Screens[i]->DriverFunc = drv->driverFunc;
+    pScrn->DriverFunc = drv->driverFunc;
 
-    return xf86Screens[i];
+    return pScrn;
 }
 
 /*
@@ -202,10 +216,17 @@ xf86DeleteScreen(ScrnInfoPtr pScrn)
 {
     int i;
     int scrnIndex;
-
-    /* First check if the screen is valid */
-    if (xf86NumScreens == 0 || xf86Screens == NULL)
-        return;
+    Bool is_gpu = FALSE;
+    if (pScrn->is_gpu) {
+        /* First check if the screen is valid */
+        if (xf86NumGPUScreens == 0 || xf86GPUScreens == NULL)
+            return;
+        is_gpu = TRUE;
+    } else {
+        /* First check if the screen is valid */
+        if (xf86NumScreens == 0 || xf86Screens == NULL)
+            return;
+    }
 
     if (!pScrn)
         return;
@@ -237,12 +258,23 @@ xf86DeleteScreen(ScrnInfoPtr pScrn)
 
     /* Move the other entries down, updating their scrnIndex fields */
 
-    xf86NumScreens--;
+    if (is_gpu) {
+        xf86NumGPUScreens--;
+        scrnIndex -= GPU_SCREEN_OFFSET;
+        for (i = scrnIndex; i < xf86NumGPUScreens; i++) {
+            xf86GPUScreens[i] = xf86GPUScreens[i + 1];
+            xf86GPUScreens[i]->scrnIndex = i + GPU_SCREEN_OFFSET;
+            /* Also need to take care of the screen layout settings */
+        }
+    }
+    else {
+        xf86NumScreens--;
 
-    for (i = scrnIndex; i < xf86NumScreens; i++) {
-        xf86Screens[i] = xf86Screens[i + 1];
-        xf86Screens[i]->scrnIndex = i;
-        /* Also need to take care of the screen layout settings */
+        for (i = scrnIndex; i < xf86NumScreens; i++) {
+            xf86Screens[i] = xf86Screens[i + 1];
+            xf86Screens[i]->scrnIndex = i;
+            /* Also need to take care of the screen layout settings */
+        }
     }
 }
 
@@ -266,6 +298,14 @@ xf86AllocateScrnInfoPrivateIndex(void)
         memset(&nprivs[idx], 0, sizeof(DevUnion));
         pScr->privates = nprivs;
     }
+    for (i = 0; i < xf86NumGPUScreens; i++) {
+        pScr = xf86GPUScreens[i];
+        nprivs = xnfrealloc(pScr->privates,
+                            xf86ScrnInfoPrivateCount * sizeof(DevUnion));
+        /* Zero the new private */
+        memset(&nprivs[idx], 0, sizeof(DevUnion));
+        pScr->privates = nprivs;
+    }
     return idx;
 }
 
@@ -1058,6 +1098,11 @@ xf86VDrvMsgVerb(int scrnIndex, MessageType type, int verb, const char *format,
         xf86Screens[scrnIndex]->name)
         LogHdrMessageVerb(type, verb, format, args, "%s(%d): ",
                           xf86Screens[scrnIndex]->name, scrnIndex);
+    else if (scrnIndex >= GPU_SCREEN_OFFSET &&
+             scrnIndex < GPU_SCREEN_OFFSET + xf86NumGPUScreens &&
+             xf86GPUScreens[scrnIndex - GPU_SCREEN_OFFSET]->name)
+        LogHdrMessageVerb(type, verb, format, args, "%s(G%d): ",
+                          xf86GPUScreens[scrnIndex - GPU_SCREEN_OFFSET]->name, scrnIndex - GPU_SCREEN_OFFSET);
     else
         LogVMessageVerb(type, verb, format, args);
 }
@@ -1833,13 +1878,23 @@ xf86MotionHistoryAllocate(InputInfoPtr pInfo)
 ScrnInfoPtr
 xf86ScreenToScrn(ScreenPtr pScreen)
 {
-    assert(pScreen->myNum < xf86NumScreens);
-    return xf86Screens[pScreen->myNum];
+    if (pScreen->isGPU) {
+        assert(pScreen->myNum - GPU_SCREEN_OFFSET < xf86NumGPUScreens);
+        return xf86GPUScreens[pScreen->myNum - GPU_SCREEN_OFFSET];
+    } else {
+        assert(pScreen->myNum < xf86NumScreens);
+        return xf86Screens[pScreen->myNum];
+    }
 }
 
 ScreenPtr
 xf86ScrnToScreen(ScrnInfoPtr pScrn)
 {
-    assert(pScrn->scrnIndex < screenInfo.numScreens);
-    return screenInfo.screens[pScrn->scrnIndex];
+    if (pScrn->is_gpu) {
+        assert(pScrn->scrnIndex - GPU_SCREEN_OFFSET < screenInfo.numGPUScreens);
+        return screenInfo.gpuscreens[pScrn->scrnIndex - GPU_SCREEN_OFFSET];
+    } else {
+        assert(pScrn->scrnIndex < screenInfo.numScreens);
+        return screenInfo.screens[pScrn->scrnIndex];
+    }
 }
diff --git a/xorg-server/hw/xfree86/common/xf86Init.c b/xorg-server/hw/xfree86/common/xf86Init.c
index 1f5a382b7..aa17a58fd 100644
--- a/xorg-server/hw/xfree86/common/xf86Init.c
+++ b/xorg-server/hw/xfree86/common/xf86Init.c
@@ -593,6 +593,18 @@ InitOutput(ScreenInfo * pScreenInfo, int argc, char **argv)
             if (!xf86Screens[i]->configured)
                 xf86DeleteScreen(xf86Screens[i--]);
 
+        for (i = 0; i < xf86NumGPUScreens; i++) {
+            xf86VGAarbiterScrnInit(xf86GPUScreens[i]);
+            xf86VGAarbiterLock(xf86GPUScreens[i]);
+            if (xf86GPUScreens[i]->PreInit &&
+                xf86GPUScreens[i]->PreInit(xf86GPUScreens[i], 0))
+                xf86GPUScreens[i]->configured = TRUE;
+            xf86VGAarbiterUnlock(xf86GPUScreens[i]);
+        }
+        for (i = 0; i < xf86NumGPUScreens; i++)
+            if (!xf86GPUScreens[i]->configured)
+                xf86DeleteScreen(xf86GPUScreens[i--]);
+
         /*
          * If no screens left, return now.
          */
@@ -818,6 +830,36 @@ InitOutput(ScreenInfo * pScreenInfo, int argc, char **argv)
         !dixRegisterPrivateKey(&xf86CreateRootWindowKeyRec, PRIVATE_SCREEN, 0))
         FatalError("Cannot register DDX private keys");
 
+    for (i = 0; i < xf86NumGPUScreens; i++) {
+        ScrnInfoPtr pScrn = xf86GPUScreens[i];
+        xf86VGAarbiterLock(pScrn);
+
+        /*
+         * Almost everything uses these defaults, and many of those that
+         * don't, will wrap them.
+         */
+        pScrn->EnableDisableFBAccess = xf86EnableDisableFBAccess;
+#ifdef XFreeXDGA
+        pScrn->SetDGAMode = xf86SetDGAMode;
+#endif
+        pScrn->DPMSSet = NULL;
+        pScrn->LoadPalette = NULL;
+        pScrn->SetOverscan = NULL;
+        pScrn->DriverFunc = NULL;
+        pScrn->pScreen = NULL;
+        scr_index = AddGPUScreen(pScrn->ScreenInit, argc, argv);
+        xf86VGAarbiterUnlock(pScrn);
+        if (scr_index == i) {
+            dixSetPrivate(&screenInfo.gpuscreens[scr_index]->devPrivates,
+                          xf86ScreenKey, xf86GPUScreens[i]);
+            pScrn->pScreen = screenInfo.gpuscreens[scr_index];
+            /* The driver should set this, but make sure it is set anyway */
+            pScrn->vtSema = TRUE;
+        } else {
+            FatalError("AddScreen/ScreenInit failed for gpu driver %d %d\n", i, scr_index);
+        }
+    }
+
     for (i = 0; i < xf86NumScreens; i++) {
         xf86VGAarbiterLock(xf86Screens[i]);
         /*
diff --git a/xorg-server/hw/xfree86/common/xf86Priv.h b/xorg-server/hw/xfree86/common/xf86Priv.h
index 42a3b30f0..c9f2e7eb8 100644
--- a/xorg-server/hw/xfree86/common/xf86Priv.h
+++ b/xorg-server/hw/xfree86/common/xf86Priv.h
@@ -95,6 +95,8 @@ extern _X_EXPORT Bool xorgHWAccess;
 
 extern _X_EXPORT RootWinPropPtr *xf86RegisteredPropertiesTable;
 
+extern ScrnInfoPtr *xf86GPUScreens;      /* List of pointers to ScrnInfoRecs */
+extern int xf86NumGPUScreens;
 #ifndef DEFAULT_VERBOSE
 #define DEFAULT_VERBOSE		0
 #endif
diff --git a/xorg-server/hw/xfree86/common/xf86Privstr.h b/xorg-server/hw/xfree86/common/xf86Privstr.h
index e78cd407d..e20be03a9 100644
--- a/xorg-server/hw/xfree86/common/xf86Privstr.h
+++ b/xorg-server/hw/xfree86/common/xf86Privstr.h
@@ -110,6 +110,8 @@ typedef struct {
 
     Bool dri2;
     MessageType dri2From;
+
+    Bool autoAddGPU;
 } xf86InfoRec, *xf86InfoPtr;
 
 #ifdef DPMSExtension
diff --git a/xorg-server/hw/xfree86/common/xf86fbBus.c b/xorg-server/hw/xfree86/common/xf86fbBus.c
index 1e5162332..303b9c2f5 100644
--- a/xorg-server/hw/xfree86/common/xf86fbBus.c
+++ b/xorg-server/hw/xfree86/common/xf86fbBus.c
@@ -54,6 +54,10 @@ xf86ClaimFbSlot(DriverPtr drvp, int chipset, GDevPtr dev, Bool active)
     EntityPtr p;
     int num;
 
+#ifdef XSERVER_PLATFORM_BUS
+    if (platformSlotClaimed)
+        return -1;
+#endif
 #ifdef XSERVER_LIBPCIACCESS
     if (pciSlotClaimed)
         return -1;
diff --git a/xorg-server/hw/xfree86/common/xf86pciBus.c b/xorg-server/hw/xfree86/common/xf86pciBus.c
index d758260b6..a2c18ebf2 100644
--- a/xorg-server/hw/xfree86/common/xf86pciBus.c
+++ b/xorg-server/hw/xfree86/common/xf86pciBus.c
@@ -110,7 +110,7 @@ xf86PciProbe(void)
             xf86PciVideoInfo[num - 1] = info;
 
             pci_device_probe(info);
-            if (pci_device_is_boot_vga(info)) {
+            if (primaryBus.type == BUS_NONE && pci_device_is_boot_vga(info)) {
                 primaryBus.type = BUS_PCI;
                 primaryBus.id.pci = info;
             }
@@ -352,7 +352,15 @@ xf86ComparePciBusString(const char *busID, int bus, int device, int func)
 Bool
 xf86IsPrimaryPci(struct pci_device *pPci)
 {
-    return ((primaryBus.type == BUS_PCI) && (pPci == primaryBus.id.pci));
+    if (primaryBus.type == BUS_PCI)
+        return pPci == primaryBus.id.pci;
+#ifdef XSERVER_PLATFORM_BUS
+    if (primaryBus.type == BUS_PLATFORM)
+        if (primaryBus.id.plat->pdev)
+            if (MATCH_PCI_DEVICES(primaryBus.id.plat->pdev, pPci))
+                return TRUE;
+#endif
+    return FALSE;
 }
 
 /*
@@ -367,7 +375,15 @@ xf86GetPciInfoForEntity(int entityIndex)
         return NULL;
 
     p = xf86Entities[entityIndex];
-    return (p->bus.type == BUS_PCI) ? p->bus.id.pci : NULL;
+    switch (p->bus.type) {
+    case BUS_PCI:
+        return p->bus.id.pci;
+    case BUS_PLATFORM:
+        return p->bus.id.plat->pdev;
+    default:
+        break;
+    }
+    return NULL;
 }
 
 /*
@@ -400,6 +416,13 @@ xf86CheckPciSlot(const struct pci_device *d)
         if ((p->bus.type == BUS_PCI) && (p->bus.id.pci == d)) {
             return FALSE;
         }
+#ifdef XSERVER_PLATFORM_BUS
+        if ((p->bus.type == BUS_PLATFORM) && (p->bus.id.plat->pdev)) {
+            struct pci_device *ud = p->bus.id.plat->pdev;
+            if (MATCH_PCI_DEVICES(ud, d))
+                return FALSE;
+        }
+#endif
     }
     return TRUE;
 }
@@ -1065,8 +1088,8 @@ xf86ConfigActivePciEntity(ScrnInfoPtr pScrn, int entityIndex,
     return TRUE;
 }
 
-static int
-videoPtrToDriverList(struct pci_device *dev,
+int
+xf86VideoPtrToDriverList(struct pci_device *dev,
                      char *returnList[], int returnListMax)
 {
     int i;
@@ -1249,8 +1272,8 @@ xchomp(char *line)
  * don't export their PCI ID's properly. If distros don't end up using this
  * feature it can and should be removed because the symbol-based resolution
  * scheme should be the primary one */
-static void
-matchDriverFromFiles(char **matches, uint16_t match_vendor, uint16_t match_chip)
+void
+xf86MatchDriverFromFiles(char **matches, uint16_t match_vendor, uint16_t match_chip)
 {
     DIR *idsdir;
     FILE *fp;
@@ -1379,7 +1402,7 @@ xf86PciMatchDriver(char *matches[], int nmatches)
     pci_iterator_destroy(iter);
 #ifdef __linux__
     if (info)
-        matchDriverFromFiles(matches, info->vendor_id, info->device_id);
+        xf86MatchDriverFromFiles(matches, info->vendor_id, info->device_id);
 #endif
 
     for (i = 0; (i < nmatches) && (matches[i]); i++) {
@@ -1387,7 +1410,7 @@ xf86PciMatchDriver(char *matches[], int nmatches)
     }
 
     if ((info != NULL) && (i < nmatches)) {
-        i += videoPtrToDriverList(info, &(matches[i]), nmatches - i);
+        i += xf86VideoPtrToDriverList(info, &(matches[i]), nmatches - i);
     }
 
     return i;
diff --git a/xorg-server/hw/xfree86/common/xf86pciBus.h b/xorg-server/hw/xfree86/common/xf86pciBus.h
index 56ec6e9e7..4972c3688 100644
--- a/xorg-server/hw/xfree86/common/xf86pciBus.h
+++ b/xorg-server/hw/xfree86/common/xf86pciBus.h
@@ -42,4 +42,14 @@ Bool xf86PciConfigure(void *busData, struct pci_device *pDev);
 void xf86PciConfigureNewDev(void *busData, struct pci_device *pVideo,
                             GDevRec * GDev, int *chipset);
 
+#define MATCH_PCI_DEVICES(x, y) (((x)->domain == (y)->domain) &&        \
+                                 ((x)->bus == (y)->bus) &&              \
+                                 ((x)->func == (y)->func) &&            \
+                                 ((x)->dev == (y)->dev))
+
+void
+xf86MatchDriverFromFiles(char **matches, uint16_t match_vendor, uint16_t match_chip);
+int
+xf86VideoPtrToDriverList(struct pci_device *dev,
+                         char *returnList[], int returnListMax);
 #endif                          /* _XF86_PCI_BUS_H */
diff --git a/xorg-server/hw/xfree86/common/xf86platformBus.c b/xorg-server/hw/xfree86/common/xf86platformBus.c
new file mode 100644
index 000000000..3bfb22e83
--- /dev/null
+++ b/xorg-server/hw/xfree86/common/xf86platformBus.c
@@ -0,0 +1,489 @@
+/*
+ * Copyright © 2012 Red Hat.
+ *
+ * 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 AUTHORS OR COPYRIGHT HOLDERS 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.
+ *
+ * Author: Dave Airlie <airlied@redhat.com>
+ */
+
+/*
+ * This file contains the interfaces to the bus-specific code
+ */
+
+#ifdef HAVE_XORG_CONFIG_H
+#include <xorg-config.h>
+#endif
+
+#ifdef XSERVER_PLATFORM_BUS
+#include <errno.h>
+
+#include <pciaccess.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include "os.h"
+#include "hotplug.h"
+
+#include "xf86.h"
+#include "xf86_OSproc.h"
+#include "xf86Priv.h"
+#include "xf86str.h"
+#include "xf86Bus.h"
+#include "Pci.h"
+#include "xf86platformBus.h"
+
+int platformSlotClaimed;
+
+int xf86_num_platform_devices;
+
+static struct xf86_platform_device *xf86_platform_devices;
+
+int
+xf86_add_platform_device(struct OdevAttributes *attribs)
+{
+    xf86_platform_devices = xnfrealloc(xf86_platform_devices,
+                                   (sizeof(struct xf86_platform_device)
+                                    * (xf86_num_platform_devices + 1)));
+
+    xf86_platform_devices[xf86_num_platform_devices].attribs = attribs;
+    xf86_platform_devices[xf86_num_platform_devices].pdev = NULL;
+
+    xf86_num_platform_devices++;
+    return 0;
+}
+
+int
+xf86_remove_platform_device(int dev_index)
+{
+    int j;
+
+    config_odev_free_attribute_list(xf86_platform_devices[dev_index].attribs);
+
+    for (j = dev_index; j < xf86_num_platform_devices - 1; j++)
+        memcpy(&xf86_platform_devices[j], &xf86_platform_devices[j + 1], sizeof(struct xf86_platform_device));
+    xf86_num_platform_devices--;
+    return 0;
+}
+
+Bool
+xf86_add_platform_device_attrib(int index, int attrib_id, char *attrib_name)
+{
+    struct xf86_platform_device *device = &xf86_platform_devices[index];
+
+    return config_odev_add_attribute(device->attribs, attrib_id, attrib_name);
+}
+
+char *
+xf86_get_platform_attrib(int index, int attrib_id)
+{
+    struct xf86_platform_device *device = &xf86_platform_devices[index];
+    struct OdevAttribute *oa;
+
+    xorg_list_for_each_entry(oa, &device->attribs->list, member) {
+        if (oa->attrib_id == attrib_id)
+            return oa->attrib_name;
+    }
+    return NULL;
+}
+
+char *
+xf86_get_platform_device_attrib(struct xf86_platform_device *device, int attrib_id)
+{
+    struct OdevAttribute *oa;
+
+    xorg_list_for_each_entry(oa, &device->attribs->list, member) {
+        if (oa->attrib_id == attrib_id)
+            return oa->attrib_name;
+    }
+    return NULL;
+}
+
+
+/*
+ * xf86IsPrimaryPlatform() -- return TRUE if primary device
+ * is a platform device and it matches this one.
+ */
+
+static Bool
+xf86IsPrimaryPlatform(struct xf86_platform_device *plat)
+{
+    return ((primaryBus.type == BUS_PLATFORM) && (plat == primaryBus.id.plat));
+}
+
+static void
+platform_find_pci_info(struct xf86_platform_device *pd, char *busid)
+{
+    struct pci_slot_match devmatch;
+    struct pci_device *info;
+    struct pci_device_iterator *iter;
+    int ret;
+
+    ret = sscanf(busid, "pci:%04x:%02x:%02x.%u",
+                 &devmatch.domain, &devmatch.bus, &devmatch.dev,
+                 &devmatch.func);
+    if (ret != 4)
+        return;
+
+    iter = pci_slot_match_iterator_create(&devmatch);
+    info = pci_device_next(iter);
+    if (info) {
+        pd->pdev = info;
+        pci_device_probe(info);
+        if (pci_device_is_boot_vga(info)) {
+            primaryBus.type = BUS_PLATFORM;
+            primaryBus.id.plat = pd;
+        }
+    }
+    pci_iterator_destroy(iter);
+
+}
+
+static Bool
+xf86_check_platform_slot(const struct xf86_platform_device *pd)
+{
+    int i;
+
+    for (i = 0; i < xf86NumEntities; i++) {
+        const EntityPtr u = xf86Entities[i];
+
+        if (pd->pdev && u->bus.type == BUS_PCI)
+            return !MATCH_PCI_DEVICES(pd->pdev, u->bus.id.pci);
+        if ((u->bus.type == BUS_PLATFORM) && (pd == u->bus.id.plat)) {
+            return FALSE;
+        }
+    }
+    return TRUE;
+}
+
+/**
+ *  @return The numbers of found devices that match with the current system
+ *  drivers.
+ */
+int
+xf86PlatformMatchDriver(char *matches[], int nmatches)
+{
+    int i, j = 0;
+    struct pci_device *info = NULL;
+    int pass = 0;
+
+    for (pass = 0; pass < 2; pass++) {
+        for (i = 0; i < xf86_num_platform_devices; i++) {
+
+            if (xf86IsPrimaryPlatform(&xf86_platform_devices[i]) && (pass == 1))
+                continue;
+            else if (!xf86IsPrimaryPlatform(&xf86_platform_devices[i]) && (pass == 0))
+                continue;
+
+            info = xf86_platform_devices[i].pdev;
+#ifdef __linux__
+            if (info)
+                xf86MatchDriverFromFiles(matches, info->vendor_id, info->device_id);
+#endif
+
+            for (j = 0; (j < nmatches) && (matches[j]); j++) {
+                /* find end of matches list */
+            }
+
+            if ((info != NULL) && (j < nmatches)) {
+                j += xf86VideoPtrToDriverList(info, &(matches[j]), nmatches - j);
+            }
+        }
+    }
+    return j;
+}
+
+int
+xf86platformProbe(void)
+{
+    int i;
+    Bool pci = TRUE;
+
+    if (!xf86scanpci()) {
+        pci = FALSE;
+    }
+
+    config_odev_probe(&xf86PlatformDeviceProbe);
+    for (i = 0; i < xf86_num_platform_devices; i++) {
+        char *busid = xf86_get_platform_attrib(i, ODEV_ATTRIB_BUSID);
+
+        if (pci && (strncmp(busid, "pci:", 4) == 0)) {
+            platform_find_pci_info(&xf86_platform_devices[i], busid);
+        }
+    }
+    return 0;
+}
+
+static int
+xf86ClaimPlatformSlot(struct xf86_platform_device * d, DriverPtr drvp,
+                  int chipset, GDevPtr dev, Bool active)
+{
+    EntityPtr p = NULL;
+    int num;
+
+    if (xf86_check_platform_slot(d)) {
+        num = xf86AllocateEntity();
+        p = xf86Entities[num];
+        p->driver = drvp;
+        p->chipset = chipset;
+        p->bus.type = BUS_PLATFORM;
+        p->bus.id.plat = d;
+        p->active = active;
+        p->inUse = FALSE;
+        if (dev)
+            xf86AddDevToEntity(num, dev);
+
+        platformSlotClaimed++;
+        return num;
+    }
+    else
+        return -1;
+}
+
+static int
+xf86UnclaimPlatformSlot(struct xf86_platform_device *d, GDevPtr dev)
+{
+    int i;
+
+    for (i = 0; i < xf86NumEntities; i++) {
+        const EntityPtr p = xf86Entities[i];
+
+        if ((p->bus.type == BUS_PLATFORM) && (p->bus.id.plat == d)) {
+            if (dev)
+                xf86RemoveDevFromEntity(i, dev);
+            platformSlotClaimed--;
+            p->bus.type = BUS_NONE;
+            return 0;
+        }
+    }
+    return 0;
+}
+
+
+#define END_OF_MATCHES(m)                                               \
+    (((m).vendor_id == 0) && ((m).device_id == 0) && ((m).subvendor_id == 0))
+
+static Bool doPlatformProbe(struct xf86_platform_device *dev, DriverPtr drvp,
+                            GDevPtr gdev, int flags, intptr_t match_data)
+{
+    Bool foundScreen = FALSE;
+    int entity;
+
+    if (gdev->screen == 0 && !xf86_check_platform_slot(dev))
+        return FALSE;
+
+    entity = xf86ClaimPlatformSlot(dev, drvp, 0,
+                                   gdev, gdev->active);
+
+    if ((entity == -1) && (gdev->screen > 0)) {
+        unsigned nent;
+
+        for (nent = 0; nent < xf86NumEntities; nent++) {
+            EntityPtr pEnt = xf86Entities[nent];
+
+            if (pEnt->bus.type != BUS_PLATFORM)
+                continue;
+            if (pEnt->bus.id.plat == dev) {
+                entity = nent;
+                xf86AddDevToEntity(nent, gdev);
+                break;
+            }
+        }
+    }
+    if (entity != -1) {
+        if (drvp->platformProbe(drvp, entity, flags, dev, match_data))
+            foundScreen = TRUE;
+        else
+            xf86UnclaimPlatformSlot(dev, gdev);
+    }
+    return foundScreen;
+}
+
+static Bool
+probeSingleDevice(struct xf86_platform_device *dev, DriverPtr drvp, GDevPtr gdev, int flags)
+{
+    int k;
+    Bool foundScreen = FALSE;
+    struct pci_device *pPci;
+    const struct pci_id_match *const devices = drvp->supported_devices;
+
+    if (dev->pdev && devices) {
+        int device_id = dev->pdev->device_id;
+        pPci = dev->pdev;
+        for (k = 0; !END_OF_MATCHES(devices[k]); k++) {
+            if (PCI_ID_COMPARE(devices[k].vendor_id, pPci->vendor_id)
+                && PCI_ID_COMPARE(devices[k].device_id, device_id)
+                && ((devices[k].device_class_mask & pPci->device_class)
+                    ==  devices[k].device_class)) {
+                foundScreen = doPlatformProbe(dev, drvp, gdev, flags, devices[k].match_data);
+                if (foundScreen)
+                    break;
+            }
+        }
+    }
+    else if (dev->pdev && !devices)
+        return FALSE;
+    else
+        foundScreen = doPlatformProbe(dev, drvp, gdev, flags, 0);
+    return foundScreen;
+}
+
+int
+xf86platformProbeDev(DriverPtr drvp)
+{
+    Bool foundScreen = FALSE;
+    GDevPtr *devList;
+    const unsigned numDevs = xf86MatchDevice(drvp->driverName, &devList);
+    int i, j;
+
+    /* find the main device or any device specificed in xorg.conf */
+    for (i = 0; i < numDevs; i++) {
+        for (j = 0; j < xf86_num_platform_devices; j++) {
+            if (devList[i]->busID && *devList[i]->busID) {
+                if (xf86PlatformDeviceCheckBusID(&xf86_platform_devices[j], devList[i]->busID))
+                    break;
+            }
+            else {
+                if (xf86_platform_devices[j].pdev) {
+                    if (xf86IsPrimaryPlatform(&xf86_platform_devices[j]))
+                        break;
+                }
+            }
+        }
+
+        if (j == xf86_num_platform_devices)
+             continue;
+
+        foundScreen = probeSingleDevice(&xf86_platform_devices[j], drvp, devList[i], 0);
+        if (!foundScreen)
+            continue;
+    }
+
+    /* if autoaddgpu devices is enabled then go find a few more and add them as GPU screens */
+    if (xf86Info.autoAddGPU && numDevs) {
+        for (j = 0; j < xf86_num_platform_devices; j++) {
+            probeSingleDevice(&xf86_platform_devices[j], drvp, devList[0], PLATFORM_PROBE_GPU_SCREEN);
+        }
+    }
+
+    return foundScreen;
+}
+
+int
+xf86platformAddDevice(int index)
+{
+    int i, old_screens, scr_index;
+    DriverPtr drvp = NULL;
+    int entity;
+    screenLayoutPtr layout;
+    static char *hotplug_driver_name = "modesetting";
+
+    /* force load the driver for now */
+    xf86LoadOneModule(hotplug_driver_name, NULL);
+
+    for (i = 0; i < xf86NumDrivers; i++) {
+        if (!xf86DriverList[i])
+            continue;
+
+        if (!strcmp(xf86DriverList[i]->driverName, hotplug_driver_name)) {
+            drvp = xf86DriverList[i];
+            break;
+        }
+    }
+    if (i == xf86NumDrivers)
+        return -1;
+
+    old_screens = xf86NumGPUScreens;
+    entity = xf86ClaimPlatformSlot(&xf86_platform_devices[index],
+                                   drvp, 0, 0, 0);
+    if (!drvp->platformProbe(drvp, entity, PLATFORM_PROBE_GPU_SCREEN, &xf86_platform_devices[index], 0)) {
+        xf86UnclaimPlatformSlot(&xf86_platform_devices[index], NULL);
+    }
+    if (old_screens == xf86NumGPUScreens)
+        return -1;
+    i = old_screens;
+
+    for (layout = xf86ConfigLayout.screens; layout->screen != NULL;
+         layout++) {
+        xf86GPUScreens[i]->confScreen = layout->screen;
+        break;
+    }
+
+    if (xf86GPUScreens[i]->PreInit &&
+        xf86GPUScreens[i]->PreInit(xf86GPUScreens[i], 0))
+        xf86GPUScreens[i]->configured = TRUE; 
+
+    if (!xf86GPUScreens[i]->configured) {
+        ErrorF("hotplugged device %d didn't configure\n", i);
+        xf86DeleteScreen(xf86GPUScreens[i]);
+        return -1;
+    }
+        
+   scr_index = AddGPUScreen(xf86GPUScreens[i]->ScreenInit, 0, NULL);
+   
+   dixSetPrivate(&xf86GPUScreens[i]->pScreen->devPrivates,
+                 xf86ScreenKey, xf86GPUScreens[i]);
+
+   CreateScratchPixmapsForScreen(xf86GPUScreens[i]->pScreen);
+  
+   return 0;
+}
+
+void
+xf86platformRemoveDevice(int index)
+{
+    EntityPtr entity;
+    int ent_num, i, j;
+    Bool found;
+
+    for (ent_num = 0; ent_num < xf86NumEntities; ent_num++) {
+        entity = xf86Entities[ent_num];
+        if (entity->bus.type == BUS_PLATFORM &&
+            entity->bus.id.plat == &xf86_platform_devices[index])
+            break;
+    }
+    if (ent_num == xf86NumEntities)
+        goto out;
+
+    found = FALSE;
+    for (i = 0; i < xf86NumGPUScreens; i++) {
+        for (j = 0; j < xf86GPUScreens[i]->numEntities; j++)
+            if (xf86GPUScreens[i]->entityList[j] == ent_num) {
+                found = TRUE;
+                break;
+            }
+        if (found)
+            break;
+    }
+    if (!found) {
+        ErrorF("failed to find screen to remove\n");
+        goto out;
+    }
+
+    xf86GPUScreens[i]->pScreen->CloseScreen(xf86GPUScreens[i]->pScreen);
+
+    RemoveGPUScreen(xf86GPUScreens[i]->pScreen);
+    xf86DeleteScreen(xf86GPUScreens[i]);
+
+    xf86UnclaimPlatformSlot(&xf86_platform_devices[index], NULL);
+
+    xf86_remove_platform_device(index);
+
+ out:
+    return;
+}
+#endif
diff --git a/xorg-server/hw/xfree86/common/xf86platformBus.h b/xorg-server/hw/xfree86/common/xf86platformBus.h
new file mode 100644
index 000000000..49afc247b
--- /dev/null
+++ b/xorg-server/hw/xfree86/common/xf86platformBus.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright © 2012 Red Hat.
+ *
+ * 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 AUTHORS OR COPYRIGHT HOLDERS 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.
+ *
+ * Author: Dave Airlie <airlied@redhat.com>
+ */
+#ifndef XF86_PLATFORM_BUS_H
+#define XF86_PLATFORM_BUS_H
+
+#include "hotplug.h"
+
+struct xf86_platform_device {
+    struct OdevAttributes *attribs;
+    /* for PCI devices */
+    struct pci_device *pdev;
+};
+
+#ifdef XSERVER_PLATFORM_BUS
+int xf86platformProbe(void);
+int xf86platformProbeDev(DriverPtr drvp);
+
+extern int xf86_num_platform_devices;
+
+extern char *
+xf86_get_platform_attrib(int index, int attrib_id);
+extern int
+xf86_add_platform_device(struct OdevAttributes *attribs);
+extern int
+xf86_remove_platform_device(int dev_index);
+extern Bool
+xf86_add_platform_device_attrib(int index, int attrib_id, char *attrib_str);
+
+extern int
+xf86platformAddDevice(int index);
+extern void
+xf86platformRemoveDevice(int index);
+
+extern _X_EXPORT char *
+xf86_get_platform_device_attrib(struct xf86_platform_device *device, int attrib_id);
+extern _X_EXPORT Bool
+xf86PlatformDeviceCheckBusID(struct xf86_platform_device *device, const char *busid);
+
+extern _X_EXPORT int
+xf86PlatformMatchDriver(char *matches[], int nmatches);
+#endif
+
+#endif
diff --git a/xorg-server/hw/xfree86/common/xf86str.h b/xorg-server/hw/xfree86/common/xf86str.h
index a1404c3aa..6bd6a6218 100644
--- a/xorg-server/hw/xfree86/common/xf86str.h
+++ b/xorg-server/hw/xfree86/common/xf86str.h
@@ -311,6 +311,7 @@ struct _SymTabRec;
 struct _PciChipsets;
 
 struct pci_device;
+struct xf86_platform_device;
 
 typedef struct _DriverRec {
     int driverVersion;
@@ -325,9 +326,16 @@ typedef struct _DriverRec {
     const struct pci_id_match *supported_devices;
     Bool (*PciProbe) (struct _DriverRec * drv, int entity_num,
                       struct pci_device * dev, intptr_t match_data);
+    Bool (*platformProbe) (struct _DriverRec * drv, int entity_num, int flags,
+                           struct xf86_platform_device * dev, intptr_t match_data);
 } DriverRec, *DriverPtr;
 
 /*
+ * platform probe flags
+ */
+#define PLATFORM_PROBE_GPU_SCREEN 1
+
+/*
  *  AddDriver flags
  */
 #define HaveDriverFuncs 1
@@ -343,6 +351,7 @@ typedef struct _DriverRec {
 #undef BUS_NONE
 #undef BUS_PCI
 #undef BUS_SBUS
+#undef BUS_PLATFORM
 #undef BUS_last
 #endif
 
@@ -350,6 +359,7 @@ typedef enum {
     BUS_NONE,
     BUS_PCI,
     BUS_SBUS,
+    BUS_PLATFORM,
     BUS_last                    /* Keep last */
 } BusType;
 
@@ -362,6 +372,7 @@ typedef struct _bus {
     union {
         struct pci_device *pci;
         SbusBusId sbus;
+        struct xf86_platform_device *plat;
     } id;
 } BusRec, *BusPtr;
 
@@ -802,6 +813,7 @@ typedef struct _ScrnInfoRec {
      */
     funcPointer reservedFuncs[NUM_RESERVED_FUNCS];
 
+    Bool is_gpu;
 } ScrnInfoRec;
 
 typedef struct {