esgs_ring_size = shader->gs_info.esgs_ring_size;;
}
- if (sel && shader->key.as_ngg && sel->so.num_outputs) {
- unsigned esgs_vertex_bytes = 4 * (4 * sel->info.num_outputs + 1);
- esgs_ring_size = MAX2(esgs_ring_size,
- shader->ngg.max_out_verts * esgs_vertex_bytes);
+ if (sel && shader->key.as_ngg) {
+ if (sel->so.num_outputs) {
+ unsigned esgs_vertex_bytes = 4 * (4 * sel->info.num_outputs + 1);
+ esgs_ring_size = MAX2(esgs_ring_size,
+ shader->ngg.max_out_verts * esgs_vertex_bytes);
+ }
+
+ /* GS stores Primitive IDs into LDS at the address corresponding
+ * to the provoking vertex. All vertex threads load and export
+ * PrimitiveID for their thread.
+ */
+ if (sel->type == PIPE_SHADER_VERTEX &&
+ shader->key.mono.u.vs_export_prim_id)
+ esgs_ring_size = MAX2(esgs_ring_size, shader->ngg.max_out_verts * 4);
}
if (esgs_ring_size) {