1 /*
2 * Copyright © 2014 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 #include "vc4_context.h"
25
26 void
vc4_emit_state(struct pipe_context * pctx)27 vc4_emit_state(struct pipe_context *pctx)
28 {
29 struct vc4_context *vc4 = vc4_context(pctx);
30 struct vc4_job *job = vc4->job;
31
32 if (vc4->dirty & (VC4_DIRTY_SCISSOR | VC4_DIRTY_VIEWPORT |
33 VC4_DIRTY_RASTERIZER)) {
34 float *vpscale = vc4->viewport.scale;
35 float *vptranslate = vc4->viewport.translate;
36 float vp_minx = -fabsf(vpscale[0]) + vptranslate[0];
37 float vp_maxx = fabsf(vpscale[0]) + vptranslate[0];
38 float vp_miny = -fabsf(vpscale[1]) + vptranslate[1];
39 float vp_maxy = fabsf(vpscale[1]) + vptranslate[1];
40
41 /* Clip to the scissor if it's enabled, but still clip to the
42 * drawable regardless since that controls where the binner
43 * tries to put things.
44 *
45 * Additionally, always clip the rendering to the viewport,
46 * since the hardware does guardband clipping, meaning
47 * primitives would rasterize outside of the view volume.
48 */
49 uint32_t minx, miny, maxx, maxy;
50 if (!vc4->rasterizer->base.scissor) {
51 minx = MAX2(vp_minx, 0);
52 miny = MAX2(vp_miny, 0);
53 maxx = MIN2(vp_maxx, job->draw_width);
54 maxy = MIN2(vp_maxy, job->draw_height);
55 } else {
56 minx = MAX2(vp_minx, vc4->scissor.minx);
57 miny = MAX2(vp_miny, vc4->scissor.miny);
58 maxx = MIN2(vp_maxx, vc4->scissor.maxx);
59 maxy = MIN2(vp_maxy, vc4->scissor.maxy);
60 }
61
62 cl_emit(&job->bcl, CLIP_WINDOW, clip) {
63 clip.clip_window_left_pixel_coordinate = minx;
64 clip.clip_window_bottom_pixel_coordinate = miny;
65 clip.clip_window_height_in_pixels = maxy - miny;
66 clip.clip_window_width_in_pixels = maxx - minx;
67 }
68
69 job->draw_min_x = MIN2(job->draw_min_x, minx);
70 job->draw_min_y = MIN2(job->draw_min_y, miny);
71 job->draw_max_x = MAX2(job->draw_max_x, maxx);
72 job->draw_max_y = MAX2(job->draw_max_y, maxy);
73 }
74
75 if (vc4->dirty & (VC4_DIRTY_RASTERIZER |
76 VC4_DIRTY_ZSA |
77 VC4_DIRTY_COMPILED_FS)) {
78 uint8_t ez_enable_mask_out = ~0;
79 uint8_t rasosm_mask_out = ~0;
80
81 struct vc4_cl_out *bcl = cl_start(&job->bcl);
82 /* HW-2905: If the RCL ends up doing a full-res load when
83 * multisampling, then early Z tracking may end up with values
84 * from the previous tile due to a HW bug. Disable it to
85 * avoid that.
86 *
87 * We should be able to skip this when the Z is cleared, but I
88 * was seeing bad rendering on glxgears -samples 4 even in
89 * that case.
90 */
91 if (job->msaa || vc4->prog.fs->disable_early_z)
92 ez_enable_mask_out &= ~VC4_CONFIG_BITS_EARLY_Z;
93
94 /* Don't set the rasterizer to oversample if we're doing our
95 * binning and load/stores in single-sample mode. This is for
96 * the samples == 1 case, where vc4 doesn't do any
97 * multisampling behavior.
98 */
99 if (!job->msaa) {
100 rasosm_mask_out &=
101 ~VC4_CONFIG_BITS_RASTERIZER_OVERSAMPLE_4X;
102 }
103
104 cl_u8(&bcl, VC4_PACKET_CONFIGURATION_BITS);
105 cl_u8(&bcl,
106 (vc4->rasterizer->config_bits[0] |
107 vc4->zsa->config_bits[0]) & rasosm_mask_out);
108 cl_u8(&bcl,
109 vc4->rasterizer->config_bits[1] |
110 vc4->zsa->config_bits[1]);
111 cl_u8(&bcl,
112 (vc4->rasterizer->config_bits[2] |
113 vc4->zsa->config_bits[2]) & ez_enable_mask_out);
114 cl_end(&job->bcl, bcl);
115 }
116
117 if (vc4->dirty & VC4_DIRTY_RASTERIZER) {
118 cl_emit_prepacked(&job->bcl, &vc4->rasterizer->packed);
119 }
120
121 if (vc4->dirty & VC4_DIRTY_VIEWPORT) {
122 cl_emit(&job->bcl, CLIPPER_XY_SCALING, clip) {
123 clip.viewport_half_width_in_1_16th_of_pixel =
124 vc4->viewport.scale[0] * 16.0f;
125 clip.viewport_half_height_in_1_16th_of_pixel =
126 vc4->viewport.scale[1] * 16.0f;
127 }
128
129 cl_emit(&job->bcl, CLIPPER_Z_SCALE_AND_OFFSET, clip) {
130 clip.viewport_z_offset_zc_to_zs =
131 vc4->viewport.translate[2];
132 clip.viewport_z_scale_zc_to_zs =
133 vc4->viewport.scale[2];
134 }
135
136 cl_emit(&job->bcl, VIEWPORT_OFFSET, vp) {
137 vp.viewport_centre_x_coordinate =
138 vc4->viewport.translate[0];
139 vp.viewport_centre_y_coordinate =
140 vc4->viewport.translate[1];
141 }
142 }
143
144 if (vc4->dirty & VC4_DIRTY_FLAT_SHADE_FLAGS) {
145 cl_emit(&job->bcl, FLAT_SHADE_FLAGS, flags) {
146 if (vc4->rasterizer->base.flatshade)
147 flags.flat_shading_flags =
148 vc4->prog.fs->color_inputs;
149 }
150 }
151 }
152