i965/blorp: Do the gen11 BTI flush

Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>

src/mesa/drivers/dri/i965/genX_blorp_exec.c

@@ -241,6 +241,20 @@ genX(blorp_exec)(struct blorp_batch *batch,
    struct gl_context *ctx = &brw->ctx;
    bool check_aperture_failed_once = false;
 
+#if GEN_GEN >= 11
+   /* The PIPE_CONTROL command description says:
+    *
+    * "Whenever a Binding Table Index (BTI) used by a Render Taget Message
+    *  points to a different RENDER_SURFACE_STATE, SW must issue a Render
+    *  Target Cache Flush by enabling this bit. When render target flush
+    *  is set due to new association of BTI, PS Scoreboard Stall bit must
+    *  be set in this packet."
+   */
+   brw_emit_pipe_control_flush(brw,
+                               PIPE_CONTROL_RENDER_TARGET_FLUSH |
+                               PIPE_CONTROL_STALL_AT_SCOREBOARD);
+#endif
+
    /* Flush the sampler and render caches.  We definitely need to flush the
     * sampler cache so that we get updated contents from the render cache for
     * the glBlitFramebuffer() source.  Also, we are sometimes warned in the