anv: Enable MSAA compression

This just enables basic MSAA compression (no fast clears) for all
multisampled surfaces.  This improves the framerate of the Sascha
"multisampling" demo by 76% on my Sky Lake laptop.  Running Talos on
medium settings with 8x MSAA, this improves the framerate in the
benchmark by 80%.

Reviewed-by: Lionel Landwerlin <[email protected]>
Reviewed-by: Chad Versace <[email protected]>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/intel/vulkan/anv_image.c b/src/intel/vulkan/anv_image.c
index 47d0a1ec333..cd142938e7f 100644
--- a/src/intel/vulkan/anv_image.c
+++ b/src/intel/vulkan/anv_image.c
@@ -238,6 +238,15 @@ make_surface(const struct anv_device *dev,
             }
          }
       }
+   } else if (aspect == VK_IMAGE_ASPECT_COLOR_BIT && vk_info->samples > 1) {
+      assert(image->aux_surface.isl.size == 0);
+      assert(!(vk_info->usage & VK_IMAGE_USAGE_STORAGE_BIT));
+      ok = isl_surf_get_mcs_surf(&dev->isl_dev, &anv_surf->isl,
+                                 &image->aux_surface.isl);
+      if (ok) {
+         add_surface(image, &image->aux_surface);
+         image->aux_usage = ISL_AUX_USAGE_MCS;
+      }
    }
 
    return VK_SUCCESS;