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
isl_gen4_choose_msaa_layout(const struct isl_device * dev,const struct isl_surf_init_info * info,enum isl_tiling tiling,enum isl_msaa_layout * msaa_layout)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
isl_gen4_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)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