3 files changed, 22 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index d8cad54667..2096be9f86 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -117,6 +117,7 @@ static void brwInitDriverFunctions( struct dd_function_table *functions )
    brw_init_queryobj_functions(functions);
 
    functions->PrepareExecBegin = brwPrepareExecBegin;
+   functions->EndTransformFeedback = brw_end_transform_feedback;
 }
 
 bool
diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index febd4fe436..6fa71a3c14 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -1076,6 +1076,11 @@ brw_update_sol_surface(struct brw_context *brw,
 bool
 brw_fprog_uses_noperspective(const struct gl_fragment_program *fprog);
 
+/* gen6_sol.c */
+void
+brw_end_transform_feedback(struct gl_context *ctx,
+                           struct gl_transform_feedback_object *obj);
+
 
 
 /*======================================================================
diff --git a/src/mesa/drivers/dri/i965/gen6_sol.c b/src/mesa/drivers/dri/i965/gen6_sol.c
index 491b39cce1..38aedcc429 100644
--- a/src/mesa/drivers/dri/i965/gen6_sol.c
+++ b/src/mesa/drivers/dri/i965/gen6_sol.c
@@ -27,6 +27,7 @@
  */
 
 #include "brw_context.h"
+#include "intel_batchbuffer.h"
 #include "brw_defines.h"
 
 static void
@@ -69,3 +70,18 @@ const struct brw_tracked_state gen6_sol_surface = {
    },
    .emit = gen6_update_sol_surfaces,
 };
+
+void
+brw_end_transform_feedback(struct gl_context *ctx,
+                           struct gl_transform_feedback_object *obj)
+{
+   /* After EndTransformFeedback, it's likely that the client program will try
+    * to draw using the contents of the transform feedback buffer as vertex
+    * input.  In order for this to work, we need to flush the data through at
+    * least the GS stage of the pipeline, and flush out the render cache.  For
+    * simplicity, just do a full flush.
+    */
+   struct brw_context *brw = brw_context(ctx);
+   struct intel_context *intel = &brw->intel;
+   intel_batchbuffer_emit_mi_flush(intel);
+}