nvk: enable zcull

Signed-off-by: Yusuf Khan <yusisamerican@gmail.com>

src/gallium/drivers/nouveau/nvc0/nvc0_vbo.c

@@ -1039,6 +1039,10 @@ nvc0_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info,
       PUSH_DATA (push, drawid_offset);
    }
 
+   PUSH_SPACE(push, 2);
+   BEGIN_NIC0(push, SUBC_3D(NV9097_SET_ZCULL_STATS));
+   PUSH_DATA (push, true);
+
    if (nvc0->screen->base.class_3d < NVE4_3D_CLASS &&
        nvc0->seamless_cube_map != nvc0->state.seamless_cube_map) {
       nvc0->state.seamless_cube_map = nvc0->seamless_cube_map;
@@ -1047,6 +1051,10 @@ nvc0_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info,
                  nvc0->seamless_cube_map ? NVC0_3D_TEX_MISC_SEAMLESS_CUBE_MAP : 0);
    }
 
+   PUSH_SPACE(push, 2);
+   BEGIN_NIC0(push, SUBC_3D(NV9097_SET_ACTIVE_ZCULL_REGION));
+   PUSH_DATA (push, 0x3f);
+
    push->kick_notify = nvc0_draw_vbo_kick_notify;
 
    for (s = 0; s < 5 && !nvc0->cb_dirty; ++s) {