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_dual_blend.h"
31 #include "util/u_memory.h"
32 #include "util/u_string.h"
33
34 #include "fd6_blend.h"
35 #include "fd6_context.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,
61 unsigned sample_mask)
62 {
63 const struct pipe_blend_state *cso = &blend->base;
64 struct fd6_blend_variant *so;
65 enum a3xx_rop_code rop = ROP_COPY;
66 bool reads_dest = false;
67 unsigned mrt_blend = 0;
68
69 if (cso->logicop_enable) {
70 rop = cso->logicop_func; /* maps 1:1 */
71 reads_dest = util_logicop_reads_dest(cso->logicop_func);
72 }
73
74 so = rzalloc_size(blend, sizeof(*so));
75 if (!so)
76 return NULL;
77
78 struct fd_ringbuffer *ring = fd_ringbuffer_new_object(
79 blend->ctx->pipe, ((A6XX_MAX_RENDER_TARGETS * 4) + 6) * 4);
80 so->stateobj = ring;
81
82 for (unsigned i = 0; i <= cso->max_rt; i++) {
83 const struct pipe_rt_blend_state *rt;
84
85 if (cso->independent_blend_enable)
86 rt = &cso->rt[i];
87 else
88 rt = &cso->rt[0];
89
90 OUT_REG(ring,
91 A6XX_RB_MRT_BLEND_CONTROL(
92 i, .rgb_src_factor = fd_blend_factor(rt->rgb_src_factor),
93 .rgb_blend_opcode = blend_func(rt->rgb_func),
94 .rgb_dest_factor = fd_blend_factor(rt->rgb_dst_factor),
95 .alpha_src_factor = fd_blend_factor(rt->alpha_src_factor),
96 .alpha_blend_opcode = blend_func(rt->alpha_func),
97 .alpha_dest_factor = fd_blend_factor(rt->alpha_dst_factor), ));
98
99 OUT_REG(ring, A6XX_RB_MRT_CONTROL(i, .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 if (rt->blend_enable) {
106 mrt_blend |= (1 << i);
107 }
108
109 if (reads_dest) {
110 mrt_blend |= (1 << i);
111 }
112 }
113
114 OUT_REG(
115 ring,
116 A6XX_RB_DITHER_CNTL(
117 .dither_mode_mrt0 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
118 .dither_mode_mrt1 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
119 .dither_mode_mrt2 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
120 .dither_mode_mrt3 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
121 .dither_mode_mrt4 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
122 .dither_mode_mrt5 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
123 .dither_mode_mrt6 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
124 .dither_mode_mrt7 =
125 cso->dither ? DITHER_ALWAYS : DITHER_DISABLE, ));
126
127 OUT_REG(ring, A6XX_SP_BLEND_CNTL(.enable_blend = mrt_blend,
128 .unk8 = true,
129 .alpha_to_coverage = cso->alpha_to_coverage,
130 .dual_color_in_enable =
131 blend->use_dual_src_blend, ));
132
133 OUT_REG(ring,
134 A6XX_RB_BLEND_CNTL(.enable_blend = mrt_blend,
135 .alpha_to_coverage = cso->alpha_to_coverage,
136 .alpha_to_one = cso->alpha_to_one,
137 .independent_blend = cso->independent_blend_enable,
138 .sample_mask = sample_mask,
139 .dual_color_in_enable = blend->use_dual_src_blend, ));
140
141 so->sample_mask = sample_mask;
142
143 util_dynarray_append(&blend->variants, struct fd6_blend_variant *, so);
144
145 return so;
146 }
147
148 void *
fd6_blend_state_create(struct pipe_context * pctx,const struct pipe_blend_state * cso)149 fd6_blend_state_create(struct pipe_context *pctx,
150 const struct pipe_blend_state *cso)
151 {
152 struct fd6_blend_stateobj *so;
153
154 so = rzalloc_size(NULL, sizeof(*so));
155 if (!so)
156 return NULL;
157
158 so->base = *cso;
159 so->ctx = fd_context(pctx);
160
161 if (cso->logicop_enable) {
162 so->reads_dest |= util_logicop_reads_dest(cso->logicop_func);
163 }
164
165 so->use_dual_src_blend =
166 cso->rt[0].blend_enable && util_blend_state_is_dual(cso, 0);
167
168 unsigned nr = cso->independent_blend_enable ? cso->max_rt : 0;
169 for (unsigned i = 0; i <= nr; i++) {
170 const struct pipe_rt_blend_state *rt = &cso->rt[i];
171
172 so->reads_dest |= rt->blend_enable;
173
174 /* From the PoV of LRZ, having masked color channels is
175 * the same as having blend enabled, in that the draw will
176 * care about the fragments from an earlier draw.
177 *
178 * NOTE we actually don't care about masked color channels
179 * that don't actually exist in the render target, but we
180 * don't know the render target format here to determine
181 * that. It is probably not worth worrying about, but if
182 * we find a game/benchmark that goes out of it's way to
183 * mask off non-existent channels, we should fixup the
184 * pipe_blend_state to give us more info.
185 */
186 if (rt->blend_enable || (rt->colormask != 0xf)) {
187 so->reads_dest = true;
188 }
189 }
190
191 util_dynarray_init(&so->variants, so);
192
193 return so;
194 }
195
196 void
fd6_blend_state_delete(struct pipe_context * pctx,void * hwcso)197 fd6_blend_state_delete(struct pipe_context *pctx, void *hwcso)
198 {
199 struct fd6_blend_stateobj *so = hwcso;
200
201 util_dynarray_foreach (&so->variants, struct fd6_blend_variant *, vp) {
202 struct fd6_blend_variant *v = *vp;
203 fd_ringbuffer_del(v->stateobj);
204 }
205
206 ralloc_free(so);
207 }
208