$Id$

This enables resume from suspend level S3 by asking the Radeon chip if it
thinks it has no memory.  If so, the card is re-POSTed via the int10
interface.  Reportedly enables the driver to work for this type of
suspend/resume cycle on Dell D600 laptops (Dell D800s as well, if the video
BIOS is patched to 4.28.20.31.C1 or later).  See Debian Bug #234575.

This patch by Emmanuel Thomé and Ole Rohne.

diff -ruN xc-old/programs/Xserver/hw/xfree86/drivers/ati/radeon_driver.c xc/programs/Xserver/hw/xfree86/drivers/ati/radeon_driver.c
--- xc-old/programs/Xserver/hw/xfree86/drivers/ati/radeon_driver.c	2004-10-20 13:11:12.744159000 +0000
+++ xc/programs/Xserver/hw/xfree86/drivers/ati/radeon_driver.c	2004-10-20 13:12:36.694397296 +0000
@@ -373,6 +373,7 @@
     "xf86InitInt10",
     "xf86FreeInt10",
     "xf86int10Addr",
+    "xf86ExecX86int10",
     NULL
 };
 
@@ -7208,9 +7214,22 @@
 {
     ScrnInfoPtr    pScrn = xf86Screens[scrnIndex];
     RADEONInfoPtr  info  = RADEONPTR(pScrn);
+    unsigned char *RADEONMMIO = info->MMIO;
 
     RADEONTRACE(("RADEONEnterVT\n"));
 
+    if (INREG(RADEON_CONFIG_MEMSIZE) == 0) { /* Softboot V_BIOS */
+       xf86Int10InfoPtr pInt;
+       xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
+                  "zero MEMSIZE, probably at D3cold. Re-POSTing via int10.\n");
+       pInt = xf86InitInt10 (info->pEnt->index);
+       if (pInt) {
+           pInt->num = 0xe6;
+           xf86ExecX86int10 (pInt);
+           xf86FreeInt10 (pInt);
+       }
+    }
+
     if (info->FBDev) {
 	unsigned char *RADEONMMIO = info->MMIO;
 	if (!fbdevHWEnterVT(scrnIndex,flags)) return FALSE;