Mesa (gallium-0.2): r300: remove the unknowns from the indx_buffer code

[Brian Paul]

Module: Mesa
Branch: gallium-0.2
Commit: 0d1f90c75e39191f1824b382dfb8d709a3e70d01
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0d1f90c75e39191f1824b382dfb8d709a3e70d01

Author: Dave Airlie <airlied at linux.ie>
Date:   Sun Dec 28 16:48:36 2008 +1000

r300: remove the unknowns from the indx_buffer code

---

 src/mesa/drivers/dri/r300/r300_reg.h    |    8 ++++----
 src/mesa/drivers/dri/r300/r300_render.c |    3 ++-
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/mesa/drivers/dri/r300/r300_reg.h b/src/mesa/drivers/dri/r300/r300_reg.h
index 778db96..7c6485e 100644
--- a/src/mesa/drivers/dri/r300/r300_reg.h
+++ b/src/mesa/drivers/dri/r300/r300_reg.h
@@ -64,7 +64,7 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define R300_SE_VPORT_ZSCALE                0x1DA8
 #define R300_SE_VPORT_ZOFFSET               0x1DAC
 
-
+#define R300_VAP_PORT_IDX0		    0x2040
 /*
  * Vertex Array Processing (VAP) Control
  */
@@ -3201,9 +3201,9 @@ enum {
 #define R300_PACKET3_3D_LOAD_VBPNTR         0x00002F00
 
 #define R300_PACKET3_INDX_BUFFER            0x00003300
-#    define R300_EB_UNK1_SHIFT                      24
-#    define R300_EB_UNK1                    (0x80<<24)
-#    define R300_EB_UNK2                        0x0810
+#    define R300_INDX_BUFFER_DST_SHIFT          0
+#    define R300_INDX_BUFFER_SKIP_SHIFT         16
+#    define R300_INDX_BUFFER_ONE_REG_WR		(1<<31)
 
 /* Same as R300_PACKET3_3D_DRAW_VBUF but without VAP_VTX_FMT */
 #define R300_PACKET3_3D_DRAW_VBUF_2         0x00003400
diff --git a/src/mesa/drivers/dri/r300/r300_render.c b/src/mesa/drivers/dri/r300/r300_render.c
index 292f87a..3a29b4d 100644
--- a/src/mesa/drivers/dri/r300/r300_render.c
+++ b/src/mesa/drivers/dri/r300/r300_render.c
@@ -208,7 +208,8 @@ static void r300FireEB(r300ContextPtr rmesa, unsigned long addr,
 	e32(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (vertex_count << 16) | type | R300_VAP_VF_CNTL__INDEX_SIZE_32bit);
 
 	start_packet3(CP_PACKET3(R300_PACKET3_INDX_BUFFER, 2), 2);
-	e32(R300_EB_UNK1 | (0 << 16) | R300_EB_UNK2);
+	e32(R300_INDX_BUFFER_ONE_REG_WR | (0 << R300_INDX_BUFFER_SKIP_SHIFT) |
+	    (R300_VAP_PORT_IDX0 >> 2))
 	e32(addr);
 	e32(vertex_count);
 }