Mesa (nvfx-next-7j): nvfx: mostly fix inline corruption magically

[Luca Barbieri]

Module: Mesa
Branch: nvfx-next-7j
Commit: 50c1c5bcd7999be8e4ae5ac0e61f492c9ee29971
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=50c1c5bcd7999be8e4ae5ac0e61f492c9ee29971

Author: Luca Barbieri <luca at luca-barbieri.com>
Date:   Thu Aug 19 22:36:00 2010 +0200

nvfx: mostly fix inline corruption magically

Not sure why this mostly works.

---

 src/gallium/drivers/nvfx/nvfx_push.c |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/src/gallium/drivers/nvfx/nvfx_push.c b/src/gallium/drivers/nvfx/nvfx_push.c
index 46e6242..a6e9d16 100644
--- a/src/gallium/drivers/nvfx/nvfx_push.c
+++ b/src/gallium/drivers/nvfx/nvfx_push.c
@@ -278,7 +278,7 @@ nvfx_push_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
 		uint8_t* map;
 		unsigned step;
 	} per_instance[16];
-	unsigned p_overhead = 0
+	unsigned p_overhead = 64 /* magic fix */
 			+ 4 /* begin/end */
 			+ 4; /* potential edgeflag enable/disable */
 
@@ -399,6 +399,14 @@ nvfx_push_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
 
 			if(max_verts >= 16)
 			{
+				/* XXX: any command a lot of times seems to (mostly) fix corruption that would otherwise happen */
+				int i;
+				for(i = 0; i < 32; ++i)
+				{
+					OUT_RING(chan, RING_3D(0x1dac, 1));
+					OUT_RING(chan, 0);
+				}
+
 				OUT_RING(chan, RING_3D(NV34TCL_VERTEX_BEGIN_END, 1));
 				OUT_RING(chan, hw_mode);
 				done = util_split_prim_next(&s, max_verts);