src/amd/vulkan/radv_meta_resolve.c

   1 /*
   2  * Copyright © 2016 Intel Corporation
   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 <assert.h>
  25 #include <stdbool.h>
  26
  27 #include "radv_meta.h"
  28 #include "radv_private.h"
  29 #include "nir/nir_builder.h"
  30 #include "sid.h"
  31
  32 /* emit 0, 0, 0, 1 */
  33 static nir_shader *
  34 build_nir_fs(void)
  35 {
  36         const struct glsl_type *vec4 = glsl_vec4_type();
  37         nir_builder b;
  38         nir_variable *f_color; /* vec4, fragment output color */
  39
  40         nir_builder_init_simple_shader(&b, NULL, MESA_SHADER_FRAGMENT, NULL);
  41         b.shader->info->name = ralloc_asprintf(b.shader,
  42                                                "meta_resolve_fs");
  43
  44         f_color = nir_variable_create(b.shader, nir_var_shader_out, vec4,
  45                                       "f_color");
  46         f_color->data.location = FRAG_RESULT_DATA0;
  47         nir_store_var(&b, f_color, nir_imm_vec4(&b, 0.0, 0.0, 0.0, 1.0), 0xf);
  48
  49         return b.shader;
  50 }
  51
  52 static VkResult
  53 create_pass(struct radv_device *device)
  54 {
  55         VkResult result;
  56         VkDevice device_h = radv_device_to_handle(device);
  57         const VkAllocationCallbacks *alloc = &device->meta_state.alloc;
  58         VkAttachmentDescription attachments[2];
  59         int i;
  60
  61         for (i = 0; i < 2; i++) {
  62                 attachments[i].format = VK_FORMAT_UNDEFINED;
  63                 attachments[i].samples = 1;
  64                 attachments[i].loadOp = VK_ATTACHMENT_LOAD_OP_LOAD;
  65                 attachments[i].storeOp = VK_ATTACHMENT_STORE_OP_STORE;
  66         }
  67         attachments[0].initialLayout = VK_IMAGE_LAYOUT_GENERAL;
  68         attachments[0].finalLayout = VK_IMAGE_LAYOUT_GENERAL;
  69         attachments[1].initialLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
  70         attachments[1].finalLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
  71
  72         result = radv_CreateRenderPass(device_h,
  73                                        &(VkRenderPassCreateInfo) {
  74                                                .sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO,
  75                                                        .attachmentCount = 2,
  76                                                        .pAttachments = attachments,
  77                                                        .subpassCount = 1,
  78                                                                 .pSubpasses = &(VkSubpassDescription) {
  79                                                        .pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS,
  80                                                        .inputAttachmentCount = 0,
  81                                                        .colorAttachmentCount = 2,
  82                                                        .pColorAttachments = (VkAttachmentReference[]) {
  83                                                                {
  84                                                                        .attachment = 0,
  85                                                                        .layout = VK_IMAGE_LAYOUT_GENERAL,
  86                                                                },
  87                                                                {
  88                                                                        .attachment = 1,
  89                                                                        .layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
  90                                                                },
  91                                                        },
  92                                                        .pResolveAttachments = NULL,
  93                                                        .pDepthStencilAttachment = &(VkAttachmentReference) {
  94                                                                .attachment = VK_ATTACHMENT_UNUSED,
  95                                                        },
  96                                                        .preserveAttachmentCount = 0,
  97                                                        .pPreserveAttachments = NULL,
  98                                                },
  99                                                                 .dependencyCount = 0,
 100                                                                          },
 101                                        alloc,
 102                                        &device->meta_state.resolve.pass);
 103
 104         return result;
 105 }
 106
 107 static VkResult
 108 create_pipeline(struct radv_device *device,
 109                 VkShaderModule vs_module_h)
 110 {
 111         VkResult result;
 112         VkDevice device_h = radv_device_to_handle(device);
 113
 114         struct radv_shader_module fs_module = {
 115                 .nir = build_nir_fs(),
 116         };
 117
 118         if (!fs_module.nir) {
 119                 /* XXX: Need more accurate error */
 120                 result = VK_ERROR_OUT_OF_HOST_MEMORY;
 121                 goto cleanup;
 122         }
 123
 124         result = radv_graphics_pipeline_create(device_h,
 125                                                radv_pipeline_cache_to_handle(&device->meta_state.cache),
 126                                                &(VkGraphicsPipelineCreateInfo) {
 127                                                        .sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO,
 128                                                        .stageCount = 2,
 129                                                        .pStages = (VkPipelineShaderStageCreateInfo[]) {
 130                                                        {
 131                                                                .sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
 132                                                                .stage = VK_SHADER_STAGE_VERTEX_BIT,
 133                                                                .module = vs_module_h,
 134                                                                .pName = "main",
 135                                                        },
 136                                                        {
 137                                                                .sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
 138                                                                .stage = VK_SHADER_STAGE_FRAGMENT_BIT,
 139                                                                .module = radv_shader_module_to_handle(&fs_module),
 140                                                                .pName = "main",
 141                                                        },
 142                                                },
 143                                                .pVertexInputState = &(VkPipelineVertexInputStateCreateInfo) {
 144                                                        .sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO,
 145                                                        .vertexBindingDescriptionCount = 0,
 146                                                        .vertexAttributeDescriptionCount = 0,
 147                                                },
 148                                                .pInputAssemblyState = &(VkPipelineInputAssemblyStateCreateInfo) {
 149                                                        .sType = VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO,
 150                                                        .topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP,
 151                                                        .primitiveRestartEnable = false,
 152                                                },
 153                                                .pViewportState = &(VkPipelineViewportStateCreateInfo) {
 154                                                        .sType = VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO,
 155                                                        .viewportCount = 1,
 156                                                        .scissorCount = 1,
 157                                                },
 158                                                .pRasterizationState = &(VkPipelineRasterizationStateCreateInfo) {
 159                                                        .sType = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO,
 160                                                        .depthClampEnable = false,
 161                                                        .rasterizerDiscardEnable = false,
 162                                                        .polygonMode = VK_POLYGON_MODE_FILL,
 163                                                        .cullMode = VK_CULL_MODE_NONE,
 164                                                        .frontFace = VK_FRONT_FACE_COUNTER_CLOCKWISE,
 165                                                },
 166                                                .pMultisampleState = &(VkPipelineMultisampleStateCreateInfo) {
 167                                                        .sType = VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO,
 168                                                        .rasterizationSamples = 1,
 169                                                        .sampleShadingEnable = false,
 170                                                        .pSampleMask = NULL,
 171                                                        .alphaToCoverageEnable = false,
 172                                                        .alphaToOneEnable = false,
 173                                                },
 174                                                .pColorBlendState = &(VkPipelineColorBlendStateCreateInfo) {
 175                                                        .sType = VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO,
 176                                                        .logicOpEnable = false,
 177                                                        .attachmentCount = 2,
 178                                                        .pAttachments = (VkPipelineColorBlendAttachmentState []) {
 179                                                                {
 180                                                                .colorWriteMask = VK_COLOR_COMPONENT_R_BIT |
 181                                                                                VK_COLOR_COMPONENT_G_BIT |
 182                                                                                VK_COLOR_COMPONENT_B_BIT |
 183                                                                                VK_COLOR_COMPONENT_A_BIT,
 184                                                                },
 185                                                                {
 186                                                                .colorWriteMask = 0,
 187
 188                                                                }
 189                                                        },
 190                                                 },
 191                                                 .pDynamicState = &(VkPipelineDynamicStateCreateInfo) {
 192                                                         .sType = VK_STRUCTURE_TYPE_PIPELINE_DYNAMIC_STATE_CREATE_INFO,
 193                                                         .dynamicStateCount = 2,
 194                                                         .pDynamicStates = (VkDynamicState[]) {
 195                                                                 VK_DYNAMIC_STATE_VIEWPORT,
 196                                                                 VK_DYNAMIC_STATE_SCISSOR,
 197                                                         },
 198                                                 },
 199                                                                                                                                        .renderPass = device->meta_state.resolve.pass,
 200                                                                                                                                        .subpass = 0,
 201                                                                                                                                        },
 202                                                &(struct radv_graphics_pipeline_create_info) {
 203                                                        .use_rectlist = true,
 204                                                        .custom_blend_mode = V_028808_CB_RESOLVE,
 205                                                                },
 206                                                &device->meta_state.alloc,
 207                                                &device->meta_state.resolve.pipeline);
 208         if (result != VK_SUCCESS)
 209                 goto cleanup;
 210
 211         goto cleanup;
 212
 213 cleanup:
 214         ralloc_free(fs_module.nir);
 215         return result;
 216 }
 217
 218 void
 219 radv_device_finish_meta_resolve_state(struct radv_device *device)
 220 {
 221         struct radv_meta_state *state = &device->meta_state;
 222         VkDevice device_h = radv_device_to_handle(device);
 223         VkRenderPass pass_h = device->meta_state.resolve.pass;
 224         const VkAllocationCallbacks *alloc = &device->meta_state.alloc;
 225
 226         if (pass_h)
 227                 radv_DestroyRenderPass(device_h, pass_h,
 228                                              &device->meta_state.alloc);
 229
 230         VkPipeline pipeline_h = state->resolve.pipeline;
 231         if (pipeline_h) {
 232                 radv_DestroyPipeline(device_h, pipeline_h, alloc);
 233         }
 234 }
 235
 236 VkResult
 237 radv_device_init_meta_resolve_state(struct radv_device *device)
 238 {
 239         VkResult res = VK_SUCCESS;
 240
 241         zero(device->meta_state.resolve);
 242
 243         struct radv_shader_module vs_module = { .nir = radv_meta_build_nir_vs_generate_vertices() };
 244         if (!vs_module.nir) {
 245                 /* XXX: Need more accurate error */
 246                 res = VK_ERROR_OUT_OF_HOST_MEMORY;
 247                 goto fail;
 248         }
 249
 250         res = create_pass(device);
 251         if (res != VK_SUCCESS)
 252                 goto fail;
 253
 254         VkShaderModule vs_module_h = radv_shader_module_to_handle(&vs_module);
 255         res = create_pipeline(device, vs_module_h);
 256         if (res != VK_SUCCESS)
 257                 goto fail;
 258
 259         goto cleanup;
 260
 261 fail:
 262         radv_device_finish_meta_resolve_state(device);
 263
 264 cleanup:
 265         ralloc_free(vs_module.nir);
 266
 267         return res;
 268 }
 269
 270 static void
 271 emit_resolve(struct radv_cmd_buffer *cmd_buffer,
 272              const VkOffset2D *dest_offset,
 273              const VkExtent2D *resolve_extent)
 274 {
 275         struct radv_device *device = cmd_buffer->device;
 276         VkCommandBuffer cmd_buffer_h = radv_cmd_buffer_to_handle(cmd_buffer);
 277
 278         cmd_buffer->state.flush_bits |= RADV_CMD_FLAG_FLUSH_AND_INV_CB;
 279
 280         VkPipeline pipeline_h = device->meta_state.resolve.pipeline;
 281         RADV_FROM_HANDLE(radv_pipeline, pipeline, pipeline_h);
 282
 283         if (cmd_buffer->state.pipeline != pipeline) {
 284                 radv_CmdBindPipeline(cmd_buffer_h, VK_PIPELINE_BIND_POINT_GRAPHICS,
 285                                      pipeline_h);
 286         }
 287
 288         radv_CmdSetViewport(radv_cmd_buffer_to_handle(cmd_buffer), 0, 1, &(VkViewport) {
 289                 .x = dest_offset->x,
 290                 .y = dest_offset->y,
 291                 .width = resolve_extent->width,
 292                 .height = resolve_extent->height,
 293                 .minDepth = 0.0f,
 294                 .maxDepth = 1.0f
 295         });
 296
 297         radv_CmdSetScissor(radv_cmd_buffer_to_handle(cmd_buffer), 0, 1, &(VkRect2D) {
 298                 .offset = *dest_offset,
 299                 .extent = *resolve_extent,
 300         });
 301
 302         radv_CmdDraw(cmd_buffer_h, 3, 1, 0, 0);
 303         cmd_buffer->state.flush_bits |= RADV_CMD_FLAG_FLUSH_AND_INV_CB;
 304 }
 305
 306 void radv_CmdResolveImage(
 307         VkCommandBuffer                             cmd_buffer_h,
 308         VkImage                                     src_image_h,
 309         VkImageLayout                               src_image_layout,
 310         VkImage                                     dest_image_h,
 311         VkImageLayout                               dest_image_layout,
 312         uint32_t                                    region_count,
 313         const VkImageResolve*                       regions)
 314 {
 315         RADV_FROM_HANDLE(radv_cmd_buffer, cmd_buffer, cmd_buffer_h);
 316         RADV_FROM_HANDLE(radv_image, src_image, src_image_h);
 317         RADV_FROM_HANDLE(radv_image, dest_image, dest_image_h);
 318         struct radv_device *device = cmd_buffer->device;
 319         struct radv_meta_saved_state saved_state;
 320         VkDevice device_h = radv_device_to_handle(device);
 321         bool use_compute_resolve = false;
 322         bool use_fragment_resolve = false;
 323         /* we can use the hw resolve only for single full resolves */
 324         if (region_count == 1) {
 325                 if (regions[0].srcOffset.x ||
 326                     regions[0].srcOffset.y ||
 327                     regions[0].srcOffset.z)
 328                         use_compute_resolve = true;
 329                 if (regions[0].dstOffset.x ||
 330                     regions[0].dstOffset.y ||
 331                     regions[0].dstOffset.z)
 332                         use_compute_resolve = true;
 333
 334                 if (regions[0].extent.width != src_image->info.width ||
 335                     regions[0].extent.height != src_image->info.height ||
 336                     regions[0].extent.depth != src_image->info.depth)
 337                         use_compute_resolve = true;
 338         } else
 339                 use_compute_resolve = true;
 340
 341         if (use_fragment_resolve) {
 342                 radv_meta_resolve_fragment_image(cmd_buffer,
 343                                                  src_image,
 344                                                  src_image_layout,
 345                                                  dest_image,
 346                                                  dest_image_layout,
 347                                                  region_count, regions);
 348                 return;
 349         }
 350
 351         if (use_compute_resolve) {
 352                 radv_meta_resolve_compute_image(cmd_buffer,
 353                                                 src_image,
 354                                                 src_image_layout,
 355                                                 dest_image,
 356                                                 dest_image_layout,
 357                                                 region_count, regions);
 358                 return;
 359         }
 360
 361         radv_meta_save_graphics_reset_vport_scissor_novertex(&saved_state, cmd_buffer);
 362
 363         assert(src_image->info.samples > 1);
 364         assert(dest_image->info.samples == 1);
 365
 366         if (src_image->info.samples >= 16) {
 367                 /* See commit aa3f9aaf31e9056a255f9e0472ebdfdaa60abe54 for the
 368                  * glBlitFramebuffer workaround for samples >= 16.
 369                  */
 370                 radv_finishme("vkCmdResolveImage: need interpolation workaround when "
 371                               "samples >= 16");
 372         }
 373
 374         if (src_image->info.array_size > 1)
 375                 radv_finishme("vkCmdResolveImage: multisample array images");
 376
 377         if (dest_image->surface.dcc_size) {
 378                 radv_initialize_dcc(cmd_buffer, dest_image, 0xffffffff);
 379         }
 380         for (uint32_t r = 0; r < region_count; ++r) {
 381                 const VkImageResolve *region = &regions[r];
 382
 383                 /* From the Vulkan 1.0 spec:
 384                  *
 385                  *    - The aspectMask member of srcSubresource and dstSubresource must
 386                  *      only contain VK_IMAGE_ASPECT_COLOR_BIT
 387                  *
 388                  *    - The layerCount member of srcSubresource and dstSubresource must
 389                  *      match
 390                  */
 391                 assert(region->srcSubresource.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT);
 392                 assert(region->dstSubresource.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT);
 393                 assert(region->srcSubresource.layerCount ==
 394                        region->dstSubresource.layerCount);
 395
 396                 const uint32_t src_base_layer =
 397                         radv_meta_get_iview_layer(src_image, &region->srcSubresource,
 398                                                   &region->srcOffset);
 399
 400                 const uint32_t dest_base_layer =
 401                         radv_meta_get_iview_layer(dest_image, &region->dstSubresource,
 402                                                   &region->dstOffset);
 403
 404                 /**
 405                  * From Vulkan 1.0.6 spec: 18.6 Resolving Multisample Images
 406                  *
 407                  *    extent is the size in texels of the source image to resolve in width,
 408                  *    height and depth. 1D images use only x and width. 2D images use x, y,
 409                  *    width and height. 3D images use x, y, z, width, height and depth.
 410                  *
 411                  *    srcOffset and dstOffset select the initial x, y, and z offsets in
 412                  *    texels of the sub-regions of the source and destination image data.
 413                  *    extent is the size in texels of the source image to resolve in width,
 414                  *    height and depth. 1D images use only x and width. 2D images use x, y,
 415                  *    width and height. 3D images use x, y, z, width, height and depth.
 416                  */
 417                 const struct VkExtent3D extent =
 418                         radv_sanitize_image_extent(src_image->type, region->extent);
 419                 const struct VkOffset3D dstOffset =
 420                         radv_sanitize_image_offset(dest_image->type, region->dstOffset);
 421
 422
 423                 for (uint32_t layer = 0; layer < region->srcSubresource.layerCount;
 424                      ++layer) {
 425
 426                         struct radv_image_view src_iview;
 427                         radv_image_view_init(&src_iview, cmd_buffer->device,
 428                                              &(VkImageViewCreateInfo) {
 429                                                      .sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO,
 430                                                              .image = src_image_h,
 431                                                              .viewType = radv_meta_get_view_type(src_image),
 432                                                              .format = src_image->vk_format,
 433                                                              .subresourceRange = {
 434                                                              .aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
 435                                                              .baseMipLevel = region->srcSubresource.mipLevel,
 436                                                              .levelCount = 1,
 437                                                              .baseArrayLayer = src_base_layer + layer,
 438                                                              .layerCount = 1,
 439                                                      },
 440                                                              },
 441                                              cmd_buffer, VK_IMAGE_USAGE_SAMPLED_BIT);
 442
 443                         struct radv_image_view dest_iview;
 444                         radv_image_view_init(&dest_iview, cmd_buffer->device,
 445                                              &(VkImageViewCreateInfo) {
 446                                                      .sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO,
 447                                                              .image = dest_image_h,
 448                                                              .viewType = radv_meta_get_view_type(dest_image),
 449                                                              .format = dest_image->vk_format,
 450                                                              .subresourceRange = {
 451                                                              .aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
 452                                                              .baseMipLevel = region->dstSubresource.mipLevel,
 453                                                              .levelCount = 1,
 454                                                              .baseArrayLayer = dest_base_layer + layer,
 455                                                              .layerCount = 1,
 456                                                      },
 457                                                              },
 458                                              cmd_buffer, VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT);
 459
 460                         VkFramebuffer fb_h;
 461                         radv_CreateFramebuffer(device_h,
 462                                                &(VkFramebufferCreateInfo) {
 463                                                        .sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO,
 464                                                                .attachmentCount = 2,
 465                                                                .pAttachments = (VkImageView[]) {
 466                                                                radv_image_view_to_handle(&src_iview),
 467                                                                radv_image_view_to_handle(&dest_iview),
 468                                                        },
 469                                                        .width = radv_minify(dest_image->info.width,
 470                                                                             region->dstSubresource.mipLevel),
 471                                                        .height = radv_minify(dest_image->info.height,
 472                                                                               region->dstSubresource.mipLevel),
 473                                                        .layers = 1
 474                                                },
 475                                                &cmd_buffer->pool->alloc,
 476                                                &fb_h);
 477
 478                         radv_CmdBeginRenderPass(cmd_buffer_h,
 479                                                       &(VkRenderPassBeginInfo) {
 480                                                               .sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO,
 481                                                                       .renderPass = device->meta_state.resolve.pass,
 482                                                                       .framebuffer = fb_h,
 483                                                                       .renderArea = {
 484                                                                       .offset = {
 485                                                                               dstOffset.x,
 486                                                                               dstOffset.y,
 487                                                                       },
 488                                                                       .extent = {
 489                                                                               extent.width,
 490                                                                               extent.height,
 491                                                                       }
 492                                                               },
 493                                                               .clearValueCount = 0,
 494                                                               .pClearValues = NULL,
 495                                                       },
 496                                                       VK_SUBPASS_CONTENTS_INLINE);
 497
 498                         emit_resolve(cmd_buffer,
 499                                      &(VkOffset2D) {
 500                                              .x = dstOffset.x,
 501                                              .y = dstOffset.y,
 502                                      },
 503                                      &(VkExtent2D) {
 504                                              .width = extent.width,
 505                                              .height = extent.height,
 506                                      });
 507
 508                         radv_CmdEndRenderPass(cmd_buffer_h);
 509
 510                         radv_DestroyFramebuffer(device_h, fb_h,
 511                                                 &cmd_buffer->pool->alloc);
 512                 }
 513         }
 514
 515         radv_meta_restore(&saved_state, cmd_buffer);
 516 }
 517
 518 /**
 519  * Emit any needed resolves for the current subpass.
 520  */
 521 void
 522 radv_cmd_buffer_resolve_subpass(struct radv_cmd_buffer *cmd_buffer)
 523 {
 524         struct radv_framebuffer *fb = cmd_buffer->state.framebuffer;
 525         const struct radv_subpass *subpass = cmd_buffer->state.subpass;
 526         struct radv_meta_saved_state saved_state;
 527
 528         /* FINISHME(perf): Skip clears for resolve attachments.
 529          *
 530          * From the Vulkan 1.0 spec:
 531          *
 532          *    If the first use of an attachment in a render pass is as a resolve
 533          *    attachment, then the loadOp is effectively ignored as the resolve is
 534          *    guaranteed to overwrite all pixels in the render area.
 535          */
 536
 537         if (!subpass->has_resolve)
 538                 return;
 539
 540         radv_meta_save_graphics_reset_vport_scissor(&saved_state, cmd_buffer);
 541
 542         for (uint32_t i = 0; i < subpass->color_count; ++i) {
 543                 VkAttachmentReference src_att = subpass->color_attachments[i];
 544                 VkAttachmentReference dest_att = subpass->resolve_attachments[i];
 545                 struct radv_image *dst_img = cmd_buffer->state.framebuffer->attachments[dest_att.attachment].attachment->image;
 546                 if (dest_att.attachment == VK_ATTACHMENT_UNUSED)
 547                         continue;
 548
 549                 if (dst_img->surface.dcc_size) {
 550                         radv_initialize_dcc(cmd_buffer, dst_img, 0xffffffff);
 551                         cmd_buffer->state.attachments[dest_att.attachment].current_layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
 552                 }
 553
 554                 struct radv_subpass resolve_subpass = {
 555                         .color_count = 2,
 556                         .color_attachments = (VkAttachmentReference[]) { src_att, dest_att },
 557                         .depth_stencil_attachment = { .attachment = VK_ATTACHMENT_UNUSED },
 558                 };
 559
 560                 radv_cmd_buffer_set_subpass(cmd_buffer, &resolve_subpass, false);
 561
 562                 /* Subpass resolves must respect the render area. We can ignore the
 563                  * render area here because vkCmdBeginRenderPass set the render area
 564                  * with 3DSTATE_DRAWING_RECTANGLE.
 565                  *
 566                  * XXX(chadv): Does the hardware really respect
 567                  * 3DSTATE_DRAWING_RECTANGLE when draing a 3DPRIM_RECTLIST?
 568                  */
 569                 emit_resolve(cmd_buffer,
 570                              &(VkOffset2D) { 0, 0 },
 571                              &(VkExtent2D) { fb->width, fb->height });
 572         }
 573
 574         cmd_buffer->state.subpass = subpass;
 575         radv_meta_restore(&saved_state, cmd_buffer);
 576 }