1 /*
2 * Copyright (C) 2016 Rob Clark <robclark@freedesktop.org>
3 * Copyright © 2018 Google, Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 * Authors:
25 * Rob Clark <robclark@freedesktop.org>
26 */
27
28 #include "pipe/p_state.h"
29 #include "util/u_blend.h"
30 #include "util/u_string.h"
31 #include "util/u_memory.h"
32
33 #include "fd6_blend.h"
34 #include "fd6_context.h"
35 #include "fd6_format.h"
36 #include "fd6_pack.h"
37
38 // XXX move somewhere common.. same across a3xx/a4xx/a5xx..
39 static enum a3xx_rb_blend_opcode
blend_func(unsigned func)40 blend_func(unsigned func)
41 {
42 switch (func) {
43 case PIPE_BLEND_ADD:
44 return BLEND_DST_PLUS_SRC;
45 case PIPE_BLEND_MIN:
46 return BLEND_MIN_DST_SRC;
47 case PIPE_BLEND_MAX:
48 return BLEND_MAX_DST_SRC;
49 case PIPE_BLEND_SUBTRACT:
50 return BLEND_SRC_MINUS_DST;
51 case PIPE_BLEND_REVERSE_SUBTRACT:
52 return BLEND_DST_MINUS_SRC;
53 default:
54 DBG("invalid blend func: %x", func);
55 return 0;
56 }
57 }
58
59 struct fd6_blend_variant *
__fd6_setup_blend_variant(struct fd6_blend_stateobj * blend,unsigned sample_mask)60 __fd6_setup_blend_variant(struct fd6_blend_stateobj *blend, unsigned sample_mask)
61 {
62 const struct pipe_blend_state *cso = &blend->base;
63 struct fd6_blend_variant *so;
64 enum a3xx_rop_code rop = ROP_COPY;
65 bool reads_dest = false;
66 unsigned mrt_blend = 0;
67
68 if (cso->logicop_enable) {
69 rop = cso->logicop_func; /* maps 1:1 */
70 reads_dest = util_logicop_reads_dest(cso->logicop_func);
71 }
72
73 so = rzalloc_size(blend, sizeof(*so));
74 if (!so)
75 return NULL;
76
77 struct fd_ringbuffer *ring = fd_ringbuffer_new_object(blend->ctx->pipe,
78 ((A6XX_MAX_RENDER_TARGETS * 4) + 6) * 4);
79 so->stateobj = ring;
80
81 for (unsigned i = 0; i <= cso->max_rt; i++) {
82 const struct pipe_rt_blend_state *rt;
83
84 if (cso->independent_blend_enable)
85 rt = &cso->rt[i];
86 else
87 rt = &cso->rt[0];
88
89 OUT_REG(ring, A6XX_RB_MRT_BLEND_CONTROL(i,
90 .rgb_src_factor = fd_blend_factor(rt->rgb_src_factor),
91 .rgb_blend_opcode = blend_func(rt->rgb_func),
92 .rgb_dest_factor = fd_blend_factor(rt->rgb_dst_factor),
93 .alpha_src_factor = fd_blend_factor(rt->alpha_src_factor),
94 .alpha_blend_opcode = blend_func(rt->alpha_func),
95 .alpha_dest_factor = fd_blend_factor(rt->alpha_dst_factor),
96 ));
97
98 OUT_REG(ring, A6XX_RB_MRT_CONTROL(i,
99 .rop_code = rop,
100 .rop_enable = cso->logicop_enable,
101 .component_enable = rt->colormask,
102 .blend = rt->blend_enable,
103 .blend2 = rt->blend_enable,
104 ));
105
106 if (rt->blend_enable) {
107 mrt_blend |= (1 << i);
108 }
109
110 if (reads_dest) {
111 mrt_blend |= (1 << i);
112 }
113 }
114
115 OUT_REG(ring, A6XX_RB_DITHER_CNTL(
116 .dither_mode_mrt0 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
117 .dither_mode_mrt1 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
118 .dither_mode_mrt2 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
119 .dither_mode_mrt3 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
120 .dither_mode_mrt4 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
121 .dither_mode_mrt5 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
122 .dither_mode_mrt6 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
123 .dither_mode_mrt7 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
124 ));
125
126 OUT_REG(ring, A6XX_SP_BLEND_CNTL(
127 .unk8 = true,
128 .alpha_to_coverage = cso->alpha_to_coverage,
129 .enabled = !!mrt_blend,
130 ));
131
132 OUT_REG(ring, A6XX_RB_BLEND_CNTL(
133 .enable_blend = mrt_blend,
134 .alpha_to_coverage = cso->alpha_to_coverage,
135 .alpha_to_one = cso->alpha_to_one,
136 .independent_blend = cso->independent_blend_enable,
137 .sample_mask = sample_mask
138 ));
139
140 so->sample_mask = sample_mask;
141
142 util_dynarray_append(&blend->variants, struct fd6_blend_variant *, so);
143
144 return so;
145 }
146
147 void *
fd6_blend_state_create(struct pipe_context * pctx,const struct pipe_blend_state * cso)148 fd6_blend_state_create(struct pipe_context *pctx,
149 const struct pipe_blend_state *cso)
150 {
151 struct fd6_blend_stateobj *so;
152
153 so = rzalloc_size(NULL, sizeof(*so));
154 if (!so)
155 return NULL;
156
157 so->base = *cso;
158 so->ctx = fd_context(pctx);
159
160 if (cso->logicop_enable) {
161 so->reads_dest |= util_logicop_reads_dest(cso->logicop_func);
162 }
163
164 unsigned nr = cso->independent_blend_enable ? cso->max_rt : 0;
165 for (unsigned i = 0; i <= nr; i++) {
166 const struct pipe_rt_blend_state *rt = &cso->rt[i];
167
168 so->reads_dest |= rt->blend_enable;
169
170 /* From the PoV of LRZ, having masked color channels is
171 * the same as having blend enabled, in that the draw will
172 * care about the fragments from an earlier draw.
173 *
174 * NOTE we actually don't care about masked color channels
175 * that don't actually exist in the render target, but we
176 * don't know the render target format here to determine
177 * that. It is probably not worth worrying about, but if
178 * we find a game/benchmark that goes out of it's way to
179 * mask off non-existent channels, we should fixup the
180 * pipe_blend_state to give us more info.
181 */
182 if (rt->blend_enable || (rt->colormask != 0xf)) {
183 so->reads_dest = true;
184 }
185 }
186
187 util_dynarray_init(&so->variants, so);
188
189 return so;
190 }
191
192 void
fd6_blend_state_delete(struct pipe_context * pctx,void * hwcso)193 fd6_blend_state_delete(struct pipe_context *pctx, void *hwcso)
194 {
195 struct fd6_blend_stateobj *so = hwcso;
196
197 util_dynarray_foreach(&so->variants, struct fd6_blend_variant *, vp) {
198 struct fd6_blend_variant *v = *vp;
199 fd_ringbuffer_del(v->stateobj);
200 }
201
202 ralloc_free(so);
203 }
204