From cb925970eeade17016f59497d2123e4e8a447164 Mon Sep 17 00:00:00 2001
From: Marek Olšák <maraeo@gmail.com>
Date: Tue, 24 Aug 2010 17:16:44 +0200
Subject: r300g: reset the index bias to 0 at the end of CS

---
 src/gallium/drivers/r300/r300_context.h | 4 +++-
 src/gallium/drivers/r300/r300_emit.c    | 2 ++
 src/gallium/drivers/r300/r300_flush.c   | 3 +++
 src/gallium/drivers/r300/r300_render.c  | 8 ++++----
 4 files changed, 12 insertions(+), 5 deletions(-)

(limited to 'src/gallium/drivers/r300')

diff --git a/src/gallium/drivers/r300/r300_context.h b/src/gallium/drivers/r300/r300_context.h
index 030bb2314f..2b665ba2b5 100644
--- a/src/gallium/drivers/r300/r300_context.h
+++ b/src/gallium/drivers/r300/r300_context.h
@@ -650,8 +650,10 @@ void r300_translate_index_buffer(struct r300_context *r300,
 /* r300_render_stencilref.c */
 void r300_plug_in_stencil_ref_fallback(struct r300_context *r300);
 
-/* r300 render */
+/* r300_render.c */
 void r300_draw_flush_vbuf(struct r300_context *r300);
+boolean r500_index_bias_supported(struct r300_context *r300);
+void r500_emit_index_bias(struct r300_context *r300, int index_bias);
 
 /* r300_state.c */
 enum r300_fb_state_change {
diff --git a/src/gallium/drivers/r300/r300_emit.c b/src/gallium/drivers/r300/r300_emit.c
index d0fd45349e..87d995010e 100644
--- a/src/gallium/drivers/r300/r300_emit.c
+++ b/src/gallium/drivers/r300/r300_emit.c
@@ -1219,6 +1219,8 @@ unsigned r300_get_num_cs_end_dwords(struct r300_context *r300)
     /* Emitted in flush. */
     dwords += 26; /* emit_query_end */
     dwords += r300->hyperz_state.size + 2; /* emit_hyperz_end + zcache flush */
+    if (r500_index_bias_supported(r300))
+        dwords += 2;
 
     return dwords;
 }
diff --git a/src/gallium/drivers/r300/r300_flush.c b/src/gallium/drivers/r300/r300_flush.c
index f00707b066..2b5d2e42ba 100644
--- a/src/gallium/drivers/r300/r300_flush.c
+++ b/src/gallium/drivers/r300/r300_flush.c
@@ -45,9 +45,12 @@ static void r300_flush(struct pipe_context* pipe,
 
     if (r300->draw)
 	r300_draw_flush_vbuf(r300);
+
     if (r300->dirty_hw) {
         r300_emit_hyperz_end(r300);
         r300_emit_query_end(r300);
+        if (r500_index_bias_supported(r300))
+            r500_emit_index_bias(r300, 0);
 
         r300->flush_counter++;
         r300->rws->cs_flush(r300->cs);
diff --git a/src/gallium/drivers/r300/r300_render.c b/src/gallium/drivers/r300/r300_render.c
index fc3844f788..e08335a105 100644
--- a/src/gallium/drivers/r300/r300_render.c
+++ b/src/gallium/drivers/r300/r300_render.c
@@ -118,13 +118,13 @@ static uint32_t r300_provoking_vertex_fixes(struct r300_context *r300,
     return color_control;
 }
 
-static boolean index_bias_supported(struct r300_context *r300)
+boolean r500_index_bias_supported(struct r300_context *r300)
 {
     return r300->screen->caps.is_r500 &&
            r300->rws->get_value(r300->rws, R300_VID_DRM_2_3_0);
 }
 
-static void r500_emit_index_bias(struct r300_context *r300, int index_bias)
+void r500_emit_index_bias(struct r300_context *r300, int index_bias)
 {
     CS_LOCALS(r300);
 
@@ -199,7 +199,7 @@ static void r300_prepare_for_rendering(struct r300_context *r300,
     boolean emit_aos       = flags & PREP_EMIT_AOS;
     boolean emit_aos_swtcl = flags & PREP_EMIT_AOS_SWTCL;
     boolean indexed        = flags & PREP_INDEXED;
-    boolean hw_index_bias  = index_bias_supported(r300);
+    boolean hw_index_bias  = r500_index_bias_supported(r300);
 
     /* Add dirty state, index offset, and AOS. */
     if (first_draw) {
@@ -506,7 +506,7 @@ static void r300_draw_range_elements(struct pipe_context* pipe,
         translate = TRUE;
     }
 
-    if (indexBias && !index_bias_supported(r300)) {
+    if (indexBias && !r500_index_bias_supported(r300)) {
         r300_split_index_bias(r300, indexBias, &buffer_offset, &index_offset);
     }
 
-- 
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