1/*
2 * Copyright © 2014-2017 Broadcom
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/**
25 * @file v3d_formats.c
26 *
27 * Contains the table and accessors for V3D texture and render target format
28 * support.
29 *
30 * The hardware has limited support for texture formats, and extremely limited
31 * support for render target formats.  As a result, we emulate other formats
32 * in our shader code, and this stores the table for doing so.
33 */
34
35#include "util/macros.h"
36
37#include "v3d_context.h"
38#include "v3d_format_table.h"
39
40/* The format internal types are the same across V3D versions */
41#define V3D_VERSION 33
42#include "broadcom/cle/v3dx_pack.h"
43
44static const struct v3d_format *
45get_format(const struct v3d_device_info *devinfo, enum pipe_format f)
46{
47        if (devinfo->ver >= 41)
48                return v3d41_get_format_desc(f);
49        else
50                return v3d33_get_format_desc(f);
51}
52
53bool
54v3d_rt_format_supported(const struct v3d_device_info *devinfo,
55                        enum pipe_format f)
56{
57        const struct v3d_format *vf = get_format(devinfo, f);
58
59        if (!vf)
60                return false;
61
62        return vf->rt_type != V3D_OUTPUT_IMAGE_FORMAT_NO;
63}
64
65uint8_t
66v3d_get_rt_format(const struct v3d_device_info *devinfo, enum pipe_format f)
67{
68        const struct v3d_format *vf = get_format(devinfo, f);
69
70        if (!vf)
71                return 0;
72
73        return vf->rt_type;
74}
75
76bool
77v3d_tex_format_supported(const struct v3d_device_info *devinfo,
78                         enum pipe_format f)
79{
80        const struct v3d_format *vf = get_format(devinfo, f);
81
82        return vf != NULL;
83}
84
85uint8_t
86v3d_get_tex_format(const struct v3d_device_info *devinfo, enum pipe_format f)
87{
88        const struct v3d_format *vf = get_format(devinfo, f);
89
90        if (!vf)
91                return 0;
92
93        return vf->tex_type;
94}
95
96uint8_t
97v3d_get_tex_return_size(const struct v3d_device_info *devinfo,
98                        enum pipe_format f, enum pipe_tex_compare compare)
99{
100        const struct v3d_format *vf = get_format(devinfo, f);
101
102        if (!vf)
103                return 0;
104
105        if (unlikely(V3D_DEBUG & V3D_DEBUG_TMU_16BIT))
106                return 16;
107
108        if (unlikely(V3D_DEBUG & V3D_DEBUG_TMU_32BIT))
109                return 32;
110
111        if (compare == PIPE_TEX_COMPARE_R_TO_TEXTURE)
112                return 16;
113
114        return vf->return_size;
115}
116
117uint8_t
118v3d_get_tex_return_channels(const struct v3d_device_info *devinfo,
119                            enum pipe_format f)
120{
121        const struct v3d_format *vf = get_format(devinfo, f);
122
123        if (!vf)
124                return 0;
125
126        return vf->return_channels;
127}
128
129const uint8_t *
130v3d_get_format_swizzle(const struct v3d_device_info *devinfo, enum pipe_format f)
131{
132        const struct v3d_format *vf = get_format(devinfo, f);
133        static const uint8_t fallback[] = {0, 1, 2, 3};
134
135        if (!vf)
136                return fallback;
137
138        return vf->swizzle;
139}
140
141void
142v3d_get_internal_type_bpp_for_output_format(const struct v3d_device_info *devinfo,
143                                            uint32_t format,
144                                            uint32_t *type,
145                                            uint32_t *bpp)
146{
147        if (devinfo->ver >= 41) {
148                return v3d41_get_internal_type_bpp_for_output_format(format,
149                                                                     type, bpp);
150        } else {
151                return v3d33_get_internal_type_bpp_for_output_format(format,
152                                                                     type, bpp);
153        }
154}
155
156bool
157v3d_tfu_supports_tex_format(const struct v3d_device_info *devinfo,
158                            uint32_t tex_format,
159                            bool for_mipmap)
160{
161        if (devinfo->ver >= 41) {
162                return v3d41_tfu_supports_tex_format(tex_format, for_mipmap);
163        } else {
164                return v3d33_tfu_supports_tex_format(tex_format, for_mipmap);
165        }
166}
167
168bool
169v3d_format_supports_tlb_msaa_resolve(const struct v3d_device_info *devinfo,
170                                     enum pipe_format f)
171{
172        uint32_t internal_type;
173        uint32_t internal_bpp;
174
175        const struct v3d_format *vf = get_format(devinfo, f);
176
177        if (!vf)
178                return false;
179
180        v3d_get_internal_type_bpp_for_output_format(devinfo,
181                                                    vf->rt_type,
182                                                    &internal_type,
183                                                    &internal_bpp);
184
185        return internal_type == V3D_INTERNAL_TYPE_8 ||
186               internal_type == V3D_INTERNAL_TYPE_16F;
187}
188