diff --git a/src/freedreno/fdl/fd6_layout.c b/src/freedreno/fdl/fd6_layout.c
index dd09a3c6d54..41fb9e4df8e 100644
--- a/src/freedreno/fdl/fd6_layout.c
+++ b/src/freedreno/fdl/fd6_layout.c
@@ -83,11 +83,13 @@ fdl6_tile_alignment(struct fdl_layout *layout, uint32_t *heightalign)
       layout->pitchalign = 2;
    }
 
-   /* note: this base_align is *probably* not always right,
-    * it doesn't really get tested. for example with UBWC we might
-    * want 4k alignment, since we align UBWC levels to 4k
+   /* Empirical evidence suggests that images with UBWC could have much
+    * looser alignment requirements, however the validity of alignment is
+    * heavily undertested and the "officially" supported alignment is 4096b.
     */
-   if (layout->cpp == 1)
+   if (layout->ubwc)
+      layout->base_align = 4096;
+   else if (layout->cpp == 1)
       layout->base_align = 64;
    else if (layout->cpp == 2)
       layout->base_align = 128;