+/* STREAMOUT CONFIG DERIVED STATE
+ *
+ * Streamout must be enabled for the PRIMITIVES_GENERATED query to work.
+ * The buffer mask is an independent state, so no writes occur if there
+ * are no buffers bound.
+ */
+
+static bool r600_get_strmout_en(struct r600_common_context *rctx)
+{
+ return rctx->streamout.streamout_enabled ||
+ rctx->streamout.prims_gen_query_enabled;
+}
+
+static void r600_emit_streamout_enable(struct r600_common_context *rctx,
+ struct r600_atom *atom)
+{
+ r600_write_context_reg(rctx->rings.gfx.cs,
+ rctx->chip_class >= EVERGREEN ?
+ R_028B94_VGT_STRMOUT_CONFIG :
+ R_028AB0_VGT_STRMOUT_EN,
+ S_028B94_STREAMOUT_0_EN(r600_get_strmout_en(rctx)));
+}
+
+static void r600_set_streamout_enable(struct r600_common_context *rctx, bool enable)
+{
+ bool old_strmout_en = r600_get_strmout_en(rctx);
+
+ rctx->streamout.streamout_enabled = enable;
+ if (old_strmout_en != r600_get_strmout_en(rctx))
+ rctx->streamout.enable_atom.dirty = true;
+}
+
+void r600_update_prims_generated_query_state(struct r600_common_context *rctx,
+ unsigned type, int diff)
+{
+ if (type == PIPE_QUERY_PRIMITIVES_GENERATED) {
+ bool old_strmout_en = r600_get_strmout_en(rctx);
+
+ rctx->streamout.num_prims_gen_queries += diff;
+ assert(rctx->streamout.num_prims_gen_queries >= 0);
+
+ rctx->streamout.prims_gen_query_enabled =
+ rctx->streamout.num_prims_gen_queries != 0;
+
+ if (old_strmout_en != r600_get_strmout_en(rctx))
+ rctx->streamout.enable_atom.dirty = true;