intel/blorp: Add helper function for stencil buffer resolve

On Gen12+, Stencil buffer's lossless compression should be resolved
with WM_HZ_OP packet.

Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>

src/intel/blorp/blorp.c

@@ -366,3 +366,33 @@ blorp_hiz_op(struct blorp_batch *batch, struct blorp_surf *surf,
       batch->blorp->exec(batch, &params);
    }
 }
+
+void
+blorp_hiz_stencil_op(struct blorp_batch *batch, struct blorp_surf *stencil,
+                     uint32_t level, uint32_t start_layer,
+                     uint32_t num_layers, enum isl_aux_op op)
+{
+   struct blorp_params params;
+   blorp_params_init(&params);
+
+   params.hiz_op = op;
+   params.full_surface_hiz_op = true;
+
+   for (uint32_t a = 0; a < num_layers; a++) {
+      const uint32_t layer = start_layer + a;
+
+         brw_blorp_surface_info_init(batch->blorp, &params.stencil, stencil, level,
+                                     layer, stencil->surf->format, true);
+         params.x1 = minify(params.stencil.surf.logical_level0_px.width,
+                            params.stencil.view.base_level);
+         params.y1 = minify(params.stencil.surf.logical_level0_px.height,
+                            params.stencil.view.base_level);
+         params.dst.surf.samples = params.stencil.surf.samples;
+         params.dst.surf.logical_level0_px =
+            params.stencil.surf.logical_level0_px;
+         params.dst.view = params.stencil.view;
+         params.num_samples = params.stencil.surf.samples;
+
+         batch->blorp->exec(batch, &params);
+   }
+}

src/intel/blorp/blorp.h

@@ -246,6 +246,10 @@ blorp_hiz_op(struct blorp_batch *batch, struct blorp_surf *surf,
              uint32_t level, uint32_t start_layer, uint32_t num_layers,
              enum isl_aux_op op);
 
+void
+blorp_hiz_stencil_op(struct blorp_batch *batch, struct blorp_surf *stencil,
+                     uint32_t level, uint32_t start_layer,
+                     uint32_t num_layers, enum isl_aux_op op);
 #ifdef __cplusplus
 } /* end extern "C" */
 #endif /* __cplusplus */