I posted the following message to the DRI-devel lists the day before
yesterday and was told it might be of interest to this discussion.
Additionally, I have attached some diffs, contrary to what is said as
follows.
I am pleased to report that thanks to the guidance Jens Owens gave in a
previous message, I have made 3D work on two heads simultaneously (IIRC,
the ATI Windows XP drivers didn't do this). I have not provided a diff
because it is quite a hack and very system specific, at the moment.
Effectively, I forced the virtual size to be 2048x768, hacked the
RADEONDoAdjustFrame() function to fix views as I wanted them, used the
default cloning stuff to setup the second monitor, and removed all the
conditionals that were preventing dual-head+DRI from working. I had to
enable Xinerama (even though I have only one screen in the server setup)
in the config file; otherwise, the desktop would end at 1024 instead of
2048. The problem I mentioned in a previous post -- not enough memory
for direct rendering w/ two screens -- was solved when I set it to 16
bpp. Does anyone have any ideas for a more elegant implementation of
this functionality, especially where the config file is concerned? This
is the first real code I have done in the Xserver and any input would be
appreciated.
--Jonathan Thambidurai
p.s. If there is something strange about the diffs, please tell me; it
is the first time I generated any
--- /usr/local/src/XFree86.current/xc/programs/Xserver/GL/dri/dri.c 2002-12-05
10:26:57.000000000 -0500
+++ dri.c 2003-03-03 18:29:30.000000000 -0500
@@ -137,13 +137,13 @@
#endif
#if defined(PANORAMIX) || defined(XFree86LOADER)
- if (xineramaInCore) {
- if (!noPanoramiXExtension) {
- DRIDrvMsg(pScreen->myNum, X_WARNING,
- "Direct rendering is not supported when Xinerama is enabled\n");
- return FALSE;
- }
- }
+/* if (xineramaInCore) { */
+/* if (!noPanoramiXExtension) { */
+/* DRIDrvMsg(pScreen->myNum, X_WARNING, */
+/* "Direct rendering is not supported when Xinerama is enabled\n"); */
+/* return FALSE; */
+/* } */
+/* } */
#endif
drmWasAvailable = drmAvailable();
---
/usr/local/src/XFree86.current/xc/programs/Xserver/hw/xfree86/drivers/ati/radeon_driver.c
2003-02-04 20:48:27.000000000 -0500
+++ radeon_driver.c 2003-03-03 19:16:23.000000000 -0500
@@ -2754,24 +2754,29 @@
xf86SetCrtcForModes(pScrn, 0);
/* We need to adjust virtual size if the clone modes have larger
- * display size.
+ * display size. JDTHAX04: hardcoding large virtual area
*/
if (info->Clone && info->CloneModes) {
DisplayModePtr clone_mode = info->CloneModes;
while (1) {
- if ((clone_mode->HDisplay > pScrn->virtualX) ||
- (clone_mode->VDisplay > pScrn->virtualY)) {
- pScrn->virtualX =
- pScrn->display->virtualX = clone_mode->HDisplay;
- pScrn->virtualY =
- pScrn->display->virtualY = clone_mode->VDisplay;
- RADEONSetPitch(pScrn);
- }
+/* if ((clone_mode->HDisplay > pScrn->virtualX) || */
+/* (clone_mode->VDisplay > pScrn->virtualY)) { */
+/* pScrn->virtualX = */
+/* pScrn->display->virtualX = clone_mode->HDisplay; */
+/* pScrn->virtualY = */
+/* pScrn->display->virtualY = clone_mode->VDisplay; */
+/* RADEONSetPitch(pScrn); */
+/* } */
if (!clone_mode->next) break;
clone_mode = clone_mode->next;
}
}
+ pScrn->virtualX = pScrn->display->virtualX = 2048;
+ pScrn->virtualY = pScrn->display->virtualY = 768;
+ RADEONSetPitch(pScrn);
+ xf86DrvMsg(pScrn->scrnIndex, X_NOTICE,
+ "JDT HACK WORKING\n");
pScrn->currentMode = pScrn->modes;
xf86PrintModes(pScrn);
@@ -3463,18 +3468,18 @@
info->directRenderingEnabled = FALSE;
else {
/* Xinerama has sync problem with DRI, disable it for now */
- if (xf86IsEntityShared(pScrn->entityList[0])) {
- info->directRenderingEnabled = FALSE;
- xf86DrvMsg(scrnIndex, X_WARNING,
- "Direct Rendering Disabled -- "
- "Dual-head configuration is not working with "
- "DRI at present.\n"
- "Please use only one Device/Screen "
- "section in your XFConfig file.\n");
- } else {
+/* if (xf86IsEntityShared(pScrn->entityList[0])) { */
+/* info->directRenderingEnabled = FALSE; */
+/* xf86DrvMsg(scrnIndex, X_WARNING, */
+/* "Direct Rendering Disabled -- " */
+/* "Dual-head configuration is not working with " */
+/* "DRI at present.\n" */
+/* "Please use only one Device/Screen " */
+/* "section in your XFConfig file.\n"); */
+/* } else { */
info->directRenderingEnabled =
RADEONDRIScreenInit(pScreen);
- }
+/* } */
if (xf86IsEntityShared(pScrn->entityList[0])) {
DevUnion *pPriv;
@@ -5492,11 +5497,23 @@
{
RADEONInfoPtr info = RADEONPTR(pScrn);
unsigned char *RADEONMMIO = info->MMIO;
- int reg, Base = y * info->CurrentLayout.displayWidth + x;
+ int reg, Base;
+
#ifdef XF86DRI
RADEONSAREAPrivPtr pSAREAPriv;
#endif
+ /*JDTHAX04*/
+ if(clone == 0){
+ x=1024;}
+ else{
+ x=0;}
+ Base = y * info->CurrentLayout.displayWidth + x;
+
+ xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
+ "RADEONDoAdjustFrame(x=%d, y=%d, clone=%d)\n",
+ x, y, clone);
+
switch (info->CurrentLayout.pixel_code) {
case 15:
case 16: Base *= 2; break;
