intel/isl: Add gen12 depth/stencil surface alignments

Signed-off-by: Jordan Justen <[email protected]>
Reviewed-by: Nanley Chery <[email protected]>

1 files changed, 64 insertions, 0 deletions

diff --git a/src/intel/isl/isl_gen12.c b/src/intel/isl/isl_gen12.c
new file mode 100644
index 00000000000..44dd462cbbd
--- /dev/null
+++ b/src/intel/isl/isl_gen12.c
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2018 Intel Corporation
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a
+ *  copy of this software and associated documentation files (the "Software"),
+ *  to deal in the Software without restriction, including without limitation
+ *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ *  and/or sell copies of the Software, and to permit persons to whom the
+ *  Software is furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice (including the next
+ *  paragraph) shall be included in all copies or substantial portions of the
+ *  Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ *  IN THE SOFTWARE.
+ */
+
+#include "isl_gen9.h"
+#include "isl_gen12.h"
+#include "isl_priv.h"
+
+void
+isl_gen12_choose_image_alignment_el(const struct isl_device *dev,
+                                    const struct isl_surf_init_info *restrict info,
+                                    enum isl_tiling tiling,
+                                    enum isl_dim_layout dim_layout,
+                                    enum isl_msaa_layout msaa_layout,
+                                    struct isl_extent3d *image_align_el)
+{
+   /* Handled by isl_choose_image_alignment_el */
+   assert(info->format != ISL_FORMAT_HIZ);
+
+   if (isl_surf_usage_is_depth(info->usage)) {
+      /* The alignment parameters for depth buffers are summarized in the
+       * following table:
+       *
+       *     Surface Format  |    MSAA     | Align Width | Align Height
+       *    -----------------+-------------+-------------+--------------
+       *       D16_UNORM     | 1x, 4x, 16x |      8      |      8
+       *     ----------------+-------------+-------------+--------------
+       *       D16_UNORM     |   2x, 8x    |     16      |      4
+       *     ----------------+-------------+-------------+--------------
+       *         other       |     any     |      8      |      4
+       *    -----------------+-------------+-------------+--------------
+       */
+      assert(isl_is_pow2(info->samples));
+      *image_align_el =
+         info->format != ISL_FORMAT_R16_UNORM ?
+         isl_extent3d(8, 4, 1) :
+         (info->samples == 2 || info->samples == 8 ?
+          isl_extent3d(16, 4, 1) : isl_extent3d(8, 8, 1));
+   } else if (isl_surf_usage_is_stencil(info->usage)) {
+      *image_align_el = isl_extent3d(16, 8, 1);
+   } else {
+      isl_gen9_choose_image_alignment_el(dev, info, tiling, dim_layout,
+                                         msaa_layout, image_align_el);
+   }
+}