3dfx kernel patch

[Ani Joshi]

On Tue, 3 Apr 2001, Kaoru Fukui wrote:

> >video=tdfx:
>
> The name is worng,It's tdfxfb.
> But I don't have the card.

No, the name is correct.  Arguments for the tdfxfb driver use
"video=tdfx:...."

The attatched patch will fix the "mirrored" text, but you *must* boot with
"video=tdfx:noaccel" as this patch doesn't have the character endian
swapping.


ani
-------------- next part --------------
--- tdfxfb.c.orig	Mon Apr  2 03:09:14 2001
+++ tdfxfb.c	Mon Apr  2 03:18:48 2001
@@ -279,6 +279,7 @@
   unsigned long clip1max;
   unsigned long srcbase;
   unsigned long dstbase;
+  unsigned long miscinit0;
 };
 
 struct tdfxfb_par {
@@ -921,6 +922,7 @@
   tdfx_outl(VIDDESKSTART,  reg->startaddr);
   tdfx_outl(VIDPROCCFG,    reg->vidcfg);
   tdfx_outl(VGAINIT1,      reg->vgainit1);  
+  tdfx_outl(MISCINIT0,	   reg->miscinit0);
 
   banshee_make_room(8);
   tdfx_outl(SRCBASE,         reg->srcbase);
@@ -1411,6 +1413,26 @@
 
   reg.screensize = par->width | (par->height << 12);
   reg.vidcfg &= ~VIDCFG_HALF_MODE;
+
+  reg.miscinit0 = tdfx_inl(MISCINIT0);
+
+#if defined(__BIG_ENDIAN)
+  switch (par->bpp) {
+    case 8:
+      reg.miscinit0 &= ~(1 << 30);
+      reg.miscinit0 &= ~(1 << 31);
+      break;
+    case 16:
+      reg.miscinit0 |= (1 << 30);
+      reg.miscinit0 |= (1 << 31);
+      break;
+    case 24:
+    case 32:
+      reg.miscinit0 |= (1 << 30);
+      reg.miscinit0 &= ~(1 << 31);
+      break;
+  }
+#endif
 
   do_write_regs(&reg);