1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
* Copyright 2015 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_gen6.h"
#include "isl_priv.h"
bool
gen6_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)
{
assert(ISL_DEV_GEN(dev) == 6);
assert(info->samples >= 1);
if (info->samples == 1) {
*msaa_layout = ISL_MSAA_LAYOUT_NONE;
return false;
}
if (!isl_format_supports_multisampling(dev->info, info->format))
return false;
/* From the Sandybridge PRM, Volume 4 Part 1 p85, SURFACE_STATE, Number of
* Multisamples:
*
* If this field is any value other than MULTISAMPLECOUNT_1 the
* following restrictions apply:
*
* - the Surface Type must be SURFTYPE_2D
* - [...]
*/
if (info->dim != ISL_SURF_DIM_2D)
return false;
/* More obvious restrictions */
if (isl_surf_usage_is_display(info->usage))
return false;
if (tiling == ISL_TILING_LINEAR)
return false;
if (info->levels > 1)
return false;
*msaa_layout = ISL_MSAA_LAYOUT_INTERLEAVED;
return true;
}
void
gen6_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);
/* Note that the surface's horizontal image alignment is not programmable
* on Sandybridge.
*
* From the Sandybridge PRM (2011-05), Volume 1, Part 1, Section 7.18.3.4
* Alignment Unit Size:
*
* Note that the compressed formats are padded to a full compression cell.
*
* +------------------------+--------+--------+
* | format | halign | valign |
* +------------------------+--------+--------+
* | YUV 4:2:2 formats | 4 | * |
* | uncompressed formats | 4 | * |
* +------------------------+--------+--------+
*
* * For these formats, the vertical alignment factor “j” is determined
* as follows:
* - j = 4 for any depth buffer
* - j = 2 for separate stencil buffer
* - j = 4 for any render target surface is multisampled (4x)
* - j = 2 for all other render target surface
*
* From the Sandrybridge PRM (2011-05), Volume 4, Part 1, Section 2.11.2
* SURFACE_STATE, Surface Vertical Alignment:
*
* - This field must be set to VALIGN_2 if the Surface Format is 96 bits
* per element (BPE).
*
* - Value of 1 [VALIGN_4] is not supported for format YCRCB_NORMAL
* (0x182), YCRCB_SWAPUVY (0x183), YCRCB_SWAPUV (0x18f), YCRCB_SWAPY
* (0x190)
*/
if (isl_format_is_compressed(info->format)) {
*image_align_el = isl_extent3d(1, 1, 1);
return;
}
if (isl_format_is_yuv(info->format)) {
*image_align_el = isl_extent3d(4, 2, 1);
return;
}
if (info->samples > 1) {
*image_align_el = isl_extent3d(4, 4, 1);
return;
}
if (isl_surf_usage_is_depth_or_stencil(info->usage) &&
!ISL_DEV_USE_SEPARATE_STENCIL(dev)) {
/* interleaved depthstencil buffer */
*image_align_el = isl_extent3d(4, 4, 1);
return;
}
if (isl_surf_usage_is_depth(info->usage)) {
/* separate depth buffer */
*image_align_el = isl_extent3d(4, 4, 1);
return;
}
if (isl_surf_usage_is_stencil(info->usage)) {
/* separate stencil buffer */
*image_align_el = isl_extent3d(4, 2, 1);
return;
}
*image_align_el = isl_extent3d(4, 2, 1);
}
|
