agp and framebuffer (intelfb) - your milage may vary

["B.G. Bruce" <bgb@nt-nv.com>]

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Hi,

with the patches/linux-2.6.9/{agpgart,drm}.patch patches applied
(shouldn't there be a symlink to linux-2.6.10?) and this ultrasimplitic
(and probably WRONG!) patch, I have agp and the intelfb working in
dom0.  I'll try other domains later today an post my results.  I would
appreciate it if someone who knows the xen agp subsystem (in particular
the agp_acquire_backend) better would look over the intelfb.patch and
post any improvements (I don't like taking out the checks made on
agp_acquire_backend(), but with them left in, I get "intelfb: cannot
acquire agp").

Thanks,
B.

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diff -Naur linux-xen/drivers/video/intelfb.orig/intelfbdrv.c linux-xen/drivers/video/intelfb/intelfbdrv.c
--- linux-xen/drivers/video/intelfb.orig/intelfbdrv.c	2005-01-26 12:04:02.000000000 -0400
+++ linux-xen/drivers/video/intelfb/intelfbdrv.c	2005-01-26 12:49:28.000000000 -0400
@@ -605,11 +605,12 @@
 	}
 
 	/* Use agpgart to manage the GATT */
-	if (agp_backend_acquire()) {
-		ERR_MSG("cannot acquire agp\n");
-		cleanup(dinfo);
-		return -ENODEV;
-	}
+	agp_backend_acquire();
+/*	if (agp_backend_acquire()) {
+*		ERR_MSG("cannot acquire agp\n");
+*		cleanup(dinfo);
+*		return -ENODEV;
+*	} */
 
 	/* get the current gatt info */
 	if (agp_copy_info(&gtt_info)) {