From 7d67324fa3a5b5cf0227550316c366752fe4abfb Mon Sep 17 00:00:00 2001
From: Alan Hourihane <alanh@fairlite.demon.co.uk>
Date: Mon, 23 Oct 2006 17:29:17 +0100
Subject: [PATCH] Add some MergedFB checks for accelerator limitations

---
 src/i830_driver.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/i830_driver.c b/src/i830_driver.c
index 3cee1c8b..432f0cb2 100644
--- a/src/i830_driver.c
+++ b/src/i830_driver.c
@@ -5468,6 +5468,16 @@ I830BIOSPreInit(ScrnInfoPtr pScrn, int flags)
 #endif
       pI830->disableTiling = TRUE; /* no DRI - so disableTiling */
 
+   if (pScrn->displayWidth >= 4096) {
+      xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "Cannot support > 1024x768 in leftof/rightof configurations. disabling DRI.\n");
+      pI830->directRenderingDisabled = TRUE;
+   }
+
+   if (pScrn->virtualY > 2048) {
+      xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "Cannot support > 2048 vertical lines. disabling acceleration.\n");
+      pI830->noAccel = TRUE;
+   }
+
    pI830->displayWidth = pScrn->displayWidth;
 
    SetPipeAccess(pScrn);