src/intel/isl/isl_gen12.c

   1 /*
   2  * Copyright (c) 2018 Intel Corporation
   3  *
   4  *  Permission is hereby granted, free of charge, to any person obtaining a
   5  *  copy of this software and associated documentation files (the "Software"),
   6  *  to deal in the Software without restriction, including without limitation
   7  *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  *  and/or sell copies of the Software, and to permit persons to whom the
   9  *  Software is furnished to do so, subject to the following conditions:
  10  *
  11  *  The above copyright notice and this permission notice (including the next
  12  *  paragraph) shall be included in all copies or substantial portions of the
  13  *  Software.
  14  *
  15  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  *  IN THE SOFTWARE.
  22  */
  23
  24 #include "isl_gen9.h"
  25 #include "isl_gen12.h"
  26 #include "isl_priv.h"
  27
  28 void
  29 isl_gen12_choose_image_alignment_el(const struct isl_device *dev,
  30                                     const struct isl_surf_init_info *restrict info,
  31                                     enum isl_tiling tiling,
  32                                     enum isl_dim_layout dim_layout,
  33                                     enum isl_msaa_layout msaa_layout,
  34                                     struct isl_extent3d *image_align_el)
  35 {
  36    /* Handled by isl_choose_image_alignment_el */
  37    assert(info->format != ISL_FORMAT_HIZ);
  38
  39    const struct isl_format_layout *fmtl = isl_format_get_layout(info->format);
  40    if (fmtl->txc == ISL_TXC_CCS) {
  41       /* This CCS compresses a 2D-view of the entire surface. */
  42       assert(info->levels == 1 && info->array_len == 1 && info->depth == 1);
  43       *image_align_el = isl_extent3d(1, 1, 1);
  44       return;
  45    }
  46
  47    if (isl_surf_usage_is_depth(info->usage)) {
  48       /* The alignment parameters for depth buffers are summarized in the
  49        * following table:
  50        *
  51        *     Surface Format  |    MSAA     | Align Width | Align Height
  52        *    -----------------+-------------+-------------+--------------
  53        *       D16_UNORM     | 1x, 4x, 16x |      8      |      8
  54        *     ----------------+-------------+-------------+--------------
  55        *       D16_UNORM     |   2x, 8x    |     16      |      4
  56        *     ----------------+-------------+-------------+--------------
  57        *         other       |     any     |      8      |      4
  58        *    -----------------+-------------+-------------+--------------
  59        */
  60       assert(isl_is_pow2(info->samples));
  61       *image_align_el =
  62          info->format != ISL_FORMAT_R16_UNORM ?
  63          isl_extent3d(8, 4, 1) :
  64          (info->samples == 2 || info->samples == 8 ?
  65           isl_extent3d(16, 4, 1) : isl_extent3d(8, 8, 1));
  66    } else if (isl_surf_usage_is_stencil(info->usage)) {
  67       *image_align_el = isl_extent3d(16, 8, 1);
  68    } else {
  69       isl_gen9_choose_image_alignment_el(dev, info, tiling, dim_layout,
  70                                          msaa_layout, image_align_el);
  71    }
  72 }