src/gallium/drivers/vc4/vc4_emit.c

   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
  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 }