vk/image: Add PRM reference for QPitch equation

Suggested-by: Nanley Chery <nanley.g.chery@intel.com>
2015-09-03 11:03:28 -07:00
parent 28503191f1
commit 0cb26523d3
1 changed files with 4 additions and 0 deletions
@@ -180,6 +180,10 @@ anv_image_make_surface(const struct anv_image_create_info *create_info,
      uint32_t h1 = align_u32(anv_minify(extent->height, 1), j);
      uint32_t w2 = align_u32(anv_minify(extent->width, 2), i);

+      /* The QPitch equation is found in the Broadwell PRM >> Volume 5: Memory
+       * Views >> Common Surface Formats >> Surface Layout >> 2D Surfaces >>
+       * Surface Arrays >> For All Surface Other Than Separate Stencil Buffer:
+       */
      qpitch = h0 + h1 + 11 * j;
      mt_width = MAX(w0, w1 + w2);
      mt_height = array_size * qpitch;