1 /* 2 * Copyright 2015 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_gen6.h" 25 #include "isl_priv.h" 26 27 bool 28 isl_gen6_choose_msaa_layout(const struct isl_device *dev, 29 const struct isl_surf_init_info *info, 30 enum isl_tiling tiling, 31 enum isl_msaa_layout *msaa_layout) 32 { 33 assert(ISL_DEV_GEN(dev) == 6); 34 assert(info->samples >= 1); 35 36 if (info->samples == 1) { 37 *msaa_layout = ISL_MSAA_LAYOUT_NONE; 38 return true; 39 } 40 41 if (!isl_format_supports_multisampling(dev->info, info->format)) 42 return false; 43 44 /* From the Sandybridge PRM, Volume 4 Part 1 p85, SURFACE_STATE, Number of 45 * Multisamples: 46 * 47 * If this field is any value other than MULTISAMPLECOUNT_1 the 48 * following restrictions apply: 49 * 50 * - the Surface Type must be SURFTYPE_2D 51 * - [...] 52 */ 53 if (info->dim != ISL_SURF_DIM_2D) 54 return false; 55 56 /* More obvious restrictions */ 57 if (isl_surf_usage_is_display(info->usage)) 58 return false; 59 if (tiling == ISL_TILING_LINEAR) 60 return false; 61 if (info->levels > 1) 62 return false; 63 64 *msaa_layout = ISL_MSAA_LAYOUT_INTERLEAVED; 65 return true; 66 } 67 68 void 69 isl_gen6_choose_image_alignment_el(const struct isl_device *dev, 70 const struct isl_surf_init_info *restrict info, 71 enum isl_tiling tiling, 72 enum isl_dim_layout dim_layout, 73 enum isl_msaa_layout msaa_layout, 74 struct isl_extent3d *image_align_el) 75 { 76 /* Handled by isl_choose_image_alignment_el */ 77 assert(info->format != ISL_FORMAT_HIZ); 78 79 /* Note that the surface's horizontal image alignment is not programmable 80 * on Sandybridge. 81 * 82 * From the Sandybridge PRM (2011-05), Volume 1, Part 1, Section 7.18.3.4 83 * Alignment Unit Size: 84 * 85 * Note that the compressed formats are padded to a full compression cell. 86 * 87 * +------------------------+--------+--------+ 88 * | format | halign | valign | 89 * +------------------------+--------+--------+ 90 * | YUV 4:2:2 formats | 4 | * | 91 * | uncompressed formats | 4 | * | 92 * +------------------------+--------+--------+ 93 * 94 * * For these formats, the vertical alignment factor j is determined 95 * as follows: 96 * - j = 4 for any depth buffer 97 * - j = 2 for separate stencil buffer 98 * - j = 4 for any render target surface is multisampled (4x) 99 * - j = 2 for all other render target surface 100 * 101 * From the Sandrybridge PRM (2011-05), Volume 4, Part 1, Section 2.11.2 102 * SURFACE_STATE, Surface Vertical Alignment: 103 * 104 * - This field must be set to VALIGN_2 if the Surface Format is 96 bits 105 * per element (BPE). 106 * 107 * - Value of 1 [VALIGN_4] is not supported for format YCRCB_NORMAL 108 * (0x182), YCRCB_SWAPUVY (0x183), YCRCB_SWAPUV (0x18f), YCRCB_SWAPY 109 * (0x190) 110 */ 111 112 if (isl_format_is_compressed(info->format)) { 113 *image_align_el = isl_extent3d(1, 1, 1); 114 return; 115 } 116 117 if (isl_format_is_yuv(info->format)) { 118 *image_align_el = isl_extent3d(4, 2, 1); 119 return; 120 } 121 122 if (info->samples > 1) { 123 *image_align_el = isl_extent3d(4, 4, 1); 124 return; 125 } 126 127 if (isl_surf_usage_is_depth_or_stencil(info->usage) && 128 !ISL_DEV_USE_SEPARATE_STENCIL(dev)) { 129 /* interleaved depthstencil buffer */ 130 *image_align_el = isl_extent3d(4, 4, 1); 131 return; 132 } 133 134 if (isl_surf_usage_is_depth(info->usage)) { 135 /* separate depth buffer */ 136 *image_align_el = isl_extent3d(4, 4, 1); 137 return; 138 } 139 140 if (isl_surf_usage_is_stencil(info->usage)) { 141 /* separate stencil buffer */ 142 *image_align_el = isl_extent3d(4, 2, 1); 143 return; 144 } 145 146 *image_align_el = isl_extent3d(4, 2, 1); 147 } 148
