intel: Track stencil aux usage on Gen12+

Enable stencil compression enable and control surface enable bit if
stencil buffer lossless compression is enabled.

v2: Remove unnecessary GEN_GEN check (Nanley Chery)

v3: (Nanley Chery)
- Change commit subject tag from intel/isl to intel
- Keep assignment order correct

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

src/gallium/drivers/iris/iris_state.c

@@ -2993,6 +2993,7 @@ iris_set_framebuffer_state(struct pipe_context *ctx,
 
       if (stencil_res) {
          view.usage |= ISL_SURF_USAGE_STENCIL_BIT;
+         info.stencil_aux_usage = stencil_res->aux.usage;
          info.stencil_surf = &stencil_res->surf;
          info.stencil_address = stencil_res->bo->gtt_offset + stencil_res->offset;
          if (!zres) {

src/intel/blorp/blorp_genX_exec.h

@@ -1600,6 +1600,7 @@ blorp_emit_depth_stencil_config(struct blorp_batch *batch,
    if (params->stencil.enabled) {
       info.stencil_surf = &params->stencil.surf;
 
+      info.stencil_aux_usage = params->stencil.aux_usage;
       struct blorp_address stencil_address = params->stencil.addr;
 #if GEN_GEN == 6
       /* Sandy bridge hardware does not technically support mipmapped stencil.

src/intel/isl/isl.h

@@ -1445,6 +1445,11 @@ struct isl_depth_stencil_hiz_emit_info {
     * The depth clear value
     */
    float depth_clear_value;
+
+   /**
+    * Track stencil aux usage for Gen >= 12
+    */
+   enum isl_aux_usage stencil_aux_usage;
 };
 
 extern const struct isl_format_layout isl_format_layouts[];

src/intel/isl/isl_emit_depth_stencil.c

@@ -146,6 +146,9 @@ isl_genX(emit_depth_stencil_hiz_s)(const struct isl_device *dev, void *batch,
       sb.Depth = sb.RenderTargetViewExtent = info->view->array_len - 1;
       sb.SurfLOD = info->view->base_level;
       sb.MinimumArrayElement = info->view->base_array_layer;
+      sb.StencilCompressionEnable =
+         info->stencil_aux_usage == ISL_AUX_USAGE_CCS_E;
+      sb.ControlSurfaceEnable = sb.StencilCompressionEnable;
 #elif GEN_GEN >= 8 || GEN_IS_HASWELL
       sb.StencilBufferEnable = true;
 #endif