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_gen4.h" 25 #include "isl_priv.h" 26 27 bool 28 isl_gen4_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 /* Gen4 and Gen5 do not support MSAA */ 34 assert(info->samples >= 1); 35 36 *msaa_layout = ISL_MSAA_LAYOUT_NONE; 37 return true; 38 } 39 40 void 41 isl_gen4_choose_image_alignment_el(const struct isl_device *dev, 42 const struct isl_surf_init_info *restrict info, 43 enum isl_tiling tiling, 44 enum isl_dim_layout dim_layout, 45 enum isl_msaa_layout msaa_layout, 46 struct isl_extent3d *image_align_el) 47 { 48 assert(info->samples == 1); 49 assert(msaa_layout == ISL_MSAA_LAYOUT_NONE); 50 assert(!isl_tiling_is_std_y(tiling)); 51 52 /* Note that neither the surface's horizontal nor vertical image alignment 53 * is programmable on gen4 nor gen5. 54 * 55 * From the G35 PRM (2008-01), Volume 1 Graphics Core, Section 6.17.3.4 56 * Alignment Unit Size: 57 * 58 * Note that the compressed formats are padded to a full compression 59 * cell. 60 * 61 * +------------------------+--------+--------+ 62 * | format | halign | valign | 63 * +------------------------+--------+--------+ 64 * | YUV 4:2:2 formats | 4 | 2 | 65 * | uncompressed formats | 4 | 2 | 66 * +------------------------+--------+--------+ 67 */ 68 69 if (isl_format_is_compressed(info->format)) { 70 *image_align_el = isl_extent3d(1, 1, 1); 71 return; 72 } 73 74 *image_align_el = isl_extent3d(4, 2, 1); 75 } 76