i965: Provide slice details to renderbuffer fast clear state tracker

This patch also introduces getter and setter for fast clear state
preparing for tracking the state per slice.

Signed-off-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/mesa/drivers/dri/i965/brw_blorp.c

@@ -222,7 +222,8 @@ blorp_surf_for_miptree(struct brw_context *brw,
    }
 
    if (is_render_target)
-      intel_miptree_used_for_rendering(brw, mt);
+      intel_miptree_used_for_rendering(brw, mt, *level,
+                                       start_layer, num_layers);
 
    if (surf->aux_usage != ISL_AUX_USAGE_NONE) {
       /* We only really need a clear color if we also have an auxiliary

src/mesa/drivers/dri/i965/brw_draw.c

@@ -386,10 +386,12 @@ brw_postdraw_set_buffers_need_resolve(struct brw_context *brw)
       struct intel_renderbuffer *irb =
          intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 
-      if (irb) {
-         brw_render_cache_set_add_bo(brw, irb->mt->bo);
-         intel_miptree_used_for_rendering(brw, irb->mt);
-      }
+      if (!irb)
+         continue;
+     
+      brw_render_cache_set_add_bo(brw, irb->mt->bo);
+      intel_miptree_used_for_rendering(
+         brw, irb->mt, irb->mt_level, irb->mt_layer, irb->layer_count);
    }
 }
 

src/mesa/drivers/dri/i965/intel_mipmap_tree.c

@@ -2205,6 +2205,13 @@ intel_miptree_all_slices_resolve_depth(struct brw_context *brw,
 					   BLORP_HIZ_OP_DEPTH_RESOLVE);
 }
 
+enum intel_fast_clear_state
+intel_miptree_get_fast_clear_state(const struct intel_mipmap_tree *mt,
+                                   unsigned level, unsigned layer)
+{
+   return mt->fast_clear_state;
+}
+
 static void
 intel_miptree_check_color_resolve(const struct intel_mipmap_tree *mt,
                                   unsigned level, unsigned layer)
@@ -2226,6 +2233,45 @@ intel_miptree_check_color_resolve(const struct intel_mipmap_tree *mt,
    (void)layer;
 }
 
+void
+intel_miptree_set_fast_clear_state(struct intel_mipmap_tree *mt,
+                                   unsigned level,
+                                   unsigned first_layer,
+                                   unsigned num_layers,
+                                   enum intel_fast_clear_state new_state)
+{
+   intel_miptree_check_color_resolve(mt, level, first_layer);
+
+   assert(first_layer + num_layers <= mt->physical_depth0);
+
+   mt->fast_clear_state = new_state;
+}
+
+void
+intel_miptree_used_for_rendering(const struct brw_context *brw,
+                                 struct intel_mipmap_tree *mt, unsigned level,
+                                 unsigned start_layer, unsigned num_layers)
+{
+   const bool is_lossless_compressed =
+      intel_miptree_is_lossless_compressed(brw, mt);
+
+   for (unsigned i = 0; i < num_layers; ++i) {
+      const enum intel_fast_clear_state fast_clear_state =
+         intel_miptree_get_fast_clear_state(mt, level, start_layer + i);
+
+      /* If the buffer was previously in fast clear state, change it to
+       * unresolved state, since it won't be guaranteed to be clear after
+       * rendering occurs.
+       */
+      if (is_lossless_compressed ||
+          fast_clear_state == INTEL_FAST_CLEAR_STATE_CLEAR) {
+         intel_miptree_set_fast_clear_state(
+            mt, level, start_layer + i, 1,
+            INTEL_FAST_CLEAR_STATE_UNRESOLVED);
+      }
+   }
+}
+
 bool
 intel_miptree_resolve_color(struct brw_context *brw,
                             struct intel_mipmap_tree *mt, unsigned level,

src/mesa/drivers/dri/i965/intel_mipmap_tree.h

@@ -962,22 +962,25 @@ intel_miptree_all_slices_resolve_depth(struct brw_context *brw,
 
 /**\}*/
 
+enum intel_fast_clear_state
+intel_miptree_get_fast_clear_state(const struct intel_mipmap_tree *mt,
+                                   unsigned level, unsigned layer);
+
+void
+intel_miptree_set_fast_clear_state(struct intel_mipmap_tree *mt,
+                                   unsigned level,
+                                   unsigned first_layer,
+                                   unsigned num_layers,
+                                   enum intel_fast_clear_state new_state);
+
 /**
  * Update the fast clear state for a miptree to indicate that it has been used
  * for rendering.
  */
-static inline void
+void
 intel_miptree_used_for_rendering(const struct brw_context *brw,
-                                 struct intel_mipmap_tree *mt)
-{
-   /* If the buffer was previously in fast clear state, change it to
-    * unresolved state, since it won't be guaranteed to be clear after
-    * rendering occurs.
-    */
-   if (mt->fast_clear_state == INTEL_FAST_CLEAR_STATE_CLEAR ||
-      intel_miptree_is_lossless_compressed(brw, mt))
-      mt->fast_clear_state = INTEL_FAST_CLEAR_STATE_UNRESOLVED;
-}
+                                 struct intel_mipmap_tree *mt, unsigned level,
+                                 unsigned start_layer, unsigned num_layers);
 
 /**
  * Flag values telling color resolve pass which special types of buffers