src/gallium/drivers/r600/r600_texture.c

   1 /*
   2  * Copyright 2010 Jerome Glisse <glisse@freedesktop.org>
   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  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *      Jerome Glisse
  25  *      Corbin Simpson
  26  */
  27 #include <errno.h>
  28 #include <pipe/p_screen.h>
  29 #include <util/u_format.h>
  30 #include <util/u_math.h>
  31 #include <util/u_inlines.h>
  32 #include <util/u_memory.h>
  33 #include "state_tracker/drm_driver.h"
  34 #include "r600_pipe.h"
  35 #include "r600_resource.h"
  36 #include "r600_state_inlines.h"
  37 #include "r600d.h"
  38
  39 extern struct u_resource_vtbl r600_texture_vtbl;
  40
  41 /* Copy from a tiled texture to a detiled one. */
  42 static void r600_copy_from_tiled_texture(struct pipe_context *ctx, struct r600_transfer *rtransfer)
  43 {
  44         struct pipe_transfer *transfer = (struct pipe_transfer*)rtransfer;
  45         struct pipe_resource *texture = transfer->resource;
  46         struct pipe_subresource subdst;
  47
  48         subdst.face = 0;
  49         subdst.level = 0;
  50         ctx->resource_copy_region(ctx, rtransfer->linear_texture,
  51                                 subdst, 0, 0, 0, texture, transfer->sr,
  52                                 transfer->box.x, transfer->box.y, transfer->box.z,
  53                                 transfer->box.width, transfer->box.height);
  54 }
  55
  56
  57 /* Copy from a detiled texture to a tiled one. */
  58 static void r600_copy_into_tiled_texture(struct pipe_context *ctx, struct r600_transfer *rtransfer)
  59 {
  60         struct pipe_transfer *transfer = (struct pipe_transfer*)rtransfer;
  61         struct pipe_resource *texture = transfer->resource;
  62         struct pipe_subresource subsrc;
  63
  64         subsrc.face = 0;
  65         subsrc.level = 0;
  66         ctx->resource_copy_region(ctx, texture, transfer->sr,
  67                                   transfer->box.x, transfer->box.y, transfer->box.z,
  68                                   rtransfer->linear_texture, subsrc,
  69                                   0, 0, 0,
  70                                   transfer->box.width, transfer->box.height);
  71
  72         ctx->flush(ctx, 0, NULL);
  73 }
  74
  75 static unsigned long r600_texture_get_offset(struct r600_resource_texture *rtex,
  76                                         unsigned level, unsigned zslice,
  77                                         unsigned face)
  78 {
  79         unsigned long offset = rtex->offset[level];
  80
  81         switch (rtex->resource.base.b.target) {
  82         case PIPE_TEXTURE_3D:
  83                 assert(face == 0);
  84                 return offset + zslice * rtex->layer_size[level];
  85         case PIPE_TEXTURE_CUBE:
  86                 assert(zslice == 0);
  87                 return offset + face * rtex->layer_size[level];
  88         default:
  89                 assert(zslice == 0 && face == 0);
  90                 return offset;
  91         }
  92 }
  93
  94 static unsigned r600_texture_get_stride(struct pipe_screen *screen,
  95                                         struct r600_resource_texture *rtex,
  96                                         unsigned level)
  97 {
  98         struct pipe_resource *ptex = &rtex->resource.base.b;
  99         struct radeon *radeon = (struct radeon *)screen->winsys;
 100         enum chip_class chipc = r600_get_family_class(radeon);
 101         unsigned width, stride;
 102
 103         width = u_minify(ptex->width0, level);
 104
 105         stride = util_format_get_stride(ptex->format, align(width, 64));
 106         if (chipc == EVERGREEN)
 107                 stride = align(stride, 512);
 108         else
 109                 stride = align(stride, 256);
 110         return stride;
 111 }
 112
 113 static unsigned r600_texture_get_nblocksy(struct pipe_screen *screen,
 114                                           struct r600_resource_texture *rtex,
 115                                           unsigned level)
 116 {
 117         struct pipe_resource *ptex = &rtex->resource.base.b;
 118         unsigned height;
 119
 120         height = u_minify(ptex->height0, level);
 121         height = util_next_power_of_two(height);
 122         return util_format_get_nblocksy(ptex->format, height);
 123 }
 124
 125 static void r600_setup_miptree(struct pipe_screen *screen,
 126                                struct r600_resource_texture *rtex)
 127 {
 128         struct pipe_resource *ptex = &rtex->resource.base.b;
 129         struct radeon *radeon = (struct radeon *)screen->winsys;
 130         enum chip_class chipc = r600_get_family_class(radeon);
 131         unsigned long pitch, size, layer_size, i, offset;
 132         unsigned nblocksy;
 133
 134         rtex->bpt = util_format_get_blocksize(ptex->format);
 135         for (i = 0, offset = 0; i <= ptex->last_level; i++) {
 136                 pitch = r600_texture_get_stride(screen, rtex, i);
 137                 nblocksy = r600_texture_get_nblocksy(screen, rtex, i);
 138
 139                 layer_size = pitch * nblocksy;
 140
 141                 if (ptex->target == PIPE_TEXTURE_CUBE) {
 142                         if (chipc >= R700)
 143                                 size = layer_size * 8;
 144                         else
 145                                 size = layer_size * 6;
 146                 }
 147                 else
 148                         size = layer_size * u_minify(ptex->depth0, i);
 149                 rtex->offset[i] = offset;
 150                 rtex->layer_size[i] = layer_size;
 151                 rtex->pitch[i] = pitch;
 152                 offset += size;
 153         }
 154         rtex->size = offset;
 155 }
 156
 157 struct pipe_resource *r600_texture_create(struct pipe_screen *screen,
 158                                                 const struct pipe_resource *templ)
 159 {
 160         struct r600_resource_texture *rtex;
 161         struct r600_resource *resource;
 162         struct radeon *radeon = (struct radeon *)screen->winsys;
 163
 164         rtex = CALLOC_STRUCT(r600_resource_texture);
 165         if (!rtex) {
 166                 return NULL;
 167         }
 168         resource = &rtex->resource;
 169         resource->base.b = *templ;
 170         resource->base.vtbl = &r600_texture_vtbl;
 171         pipe_reference_init(&resource->base.b.reference, 1);
 172         resource->base.b.screen = screen;
 173         r600_setup_miptree(screen, rtex);
 174
 175         /* FIXME alignment 4096 enought ? too much ? */
 176         resource->domain = r600_domain_from_usage(resource->base.b.bind);
 177         resource->size = rtex->size;
 178         resource->bo = r600_bo(radeon, rtex->size, 4096, 0);
 179         if (resource->bo == NULL) {
 180                 FREE(rtex);
 181                 return NULL;
 182         }
 183         return &resource->base.b;
 184 }
 185
 186 static void r600_texture_destroy(struct pipe_screen *screen,
 187                                  struct pipe_resource *ptex)
 188 {
 189         struct r600_resource_texture *rtex = (struct r600_resource_texture*)ptex;
 190         struct r600_resource *resource = &rtex->resource;
 191         struct radeon *radeon = (struct radeon *)screen->winsys;
 192
 193         if (rtex->flushed_depth_texture)
 194                 pipe_resource_reference((struct pipe_resource **)&rtex->flushed_depth_texture, NULL);
 195
 196         if (resource->bo) {
 197                 r600_bo_reference(radeon, &resource->bo, NULL);
 198         }
 199         FREE(rtex);
 200 }
 201
 202 static struct pipe_surface *r600_get_tex_surface(struct pipe_screen *screen,
 203                                                 struct pipe_resource *texture,
 204                                                 unsigned face, unsigned level,
 205                                                 unsigned zslice, unsigned flags)
 206 {
 207         struct r600_resource_texture *rtex = (struct r600_resource_texture*)texture;
 208         struct pipe_surface *surface = CALLOC_STRUCT(pipe_surface);
 209         unsigned long offset;
 210
 211         if (surface == NULL)
 212                 return NULL;
 213         offset = r600_texture_get_offset(rtex, level, zslice, face);
 214         pipe_reference_init(&surface->reference, 1);
 215         pipe_resource_reference(&surface->texture, texture);
 216         surface->format = texture->format;
 217         surface->width = u_minify(texture->width0, level);
 218         surface->height = u_minify(texture->height0, level);
 219         surface->offset = offset;
 220         surface->usage = flags;
 221         surface->zslice = zslice;
 222         surface->texture = texture;
 223         surface->face = face;
 224         surface->level = level;
 225         return surface;
 226 }
 227
 228 static void r600_tex_surface_destroy(struct pipe_surface *surface)
 229 {
 230         pipe_resource_reference(&surface->texture, NULL);
 231         FREE(surface);
 232 }
 233
 234 struct pipe_resource *r600_texture_from_handle(struct pipe_screen *screen,
 235                                                const struct pipe_resource *templ,
 236                                                struct winsys_handle *whandle)
 237 {
 238         struct radeon *rw = (struct radeon*)screen->winsys;
 239         struct r600_resource_texture *rtex;
 240         struct r600_resource *resource;
 241         struct r600_bo *bo = NULL;
 242
 243         /* Support only 2D textures without mipmaps */
 244         if ((templ->target != PIPE_TEXTURE_2D && templ->target != PIPE_TEXTURE_RECT) ||
 245               templ->depth0 != 1 || templ->last_level != 0)
 246                 return NULL;
 247
 248         rtex = CALLOC_STRUCT(r600_resource_texture);
 249         if (rtex == NULL)
 250                 return NULL;
 251
 252         bo = r600_bo_handle(rw, whandle->handle);
 253         if (bo == NULL) {
 254                 FREE(rtex);
 255                 return NULL;
 256         }
 257
 258         resource = &rtex->resource;
 259         resource->base.b = *templ;
 260         resource->base.vtbl = &r600_texture_vtbl;
 261         pipe_reference_init(&resource->base.b.reference, 1);
 262         resource->base.b.screen = screen;
 263         resource->bo = bo;
 264         rtex->depth = 0;
 265         rtex->pitch_override = whandle->stride;
 266         rtex->bpt = util_format_get_blocksize(templ->format);
 267         rtex->pitch[0] = whandle->stride;
 268         rtex->offset[0] = 0;
 269         rtex->size = align(rtex->pitch[0] * templ->height0, 64);
 270
 271         return &resource->base.b;
 272 }
 273
 274 static unsigned int r600_texture_is_referenced(struct pipe_context *context,
 275                                                 struct pipe_resource *texture,
 276                                                 unsigned face, unsigned level)
 277 {
 278         /* FIXME */
 279         return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 280 }
 281
 282 int (*r600_blit_uncompress_depth_ptr)(struct pipe_context *ctx, struct r600_resource_texture *texture);
 283
 284 int r600_texture_depth_flush(struct pipe_context *ctx,
 285                              struct pipe_resource *texture)
 286 {
 287         struct r600_resource_texture *rtex = (struct r600_resource_texture*)texture;
 288         struct pipe_resource resource;
 289
 290         if (rtex->flushed_depth_texture)
 291                 goto out;
 292
 293         resource.target = PIPE_TEXTURE_2D;
 294         resource.format = texture->format;
 295         resource.width0 = texture->width0;
 296         resource.height0 = texture->height0;
 297         resource.depth0 = 1;
 298         resource.last_level = 0;
 299         resource.nr_samples = 0;
 300         resource.usage = PIPE_USAGE_DYNAMIC;
 301         resource.bind = 0;
 302         resource.flags = 0;
 303
 304         resource.bind |= PIPE_BIND_RENDER_TARGET;
 305
 306         rtex->flushed_depth_texture = (struct r600_resource_texture *)ctx->screen->resource_create(ctx->screen, &resource);
 307         if (rtex->flushed_depth_texture == NULL) {
 308                 R600_ERR("failed to create temporary texture to hold untiled copy\n");
 309                 return -ENOMEM;
 310         }
 311
 312 out:
 313         r600_blit_uncompress_depth_ptr(ctx, rtex);
 314         return 0;
 315 }
 316
 317 struct pipe_transfer* r600_texture_get_transfer(struct pipe_context *ctx,
 318                                                 struct pipe_resource *texture,
 319                                                 struct pipe_subresource sr,
 320                                                 unsigned usage,
 321                                                 const struct pipe_box *box)
 322 {
 323         struct r600_resource_texture *rtex = (struct r600_resource_texture*)texture;
 324         struct pipe_resource resource;
 325         struct r600_transfer *trans;
 326         int r;
 327
 328         trans = CALLOC_STRUCT(r600_transfer);
 329         if (trans == NULL)
 330                 return NULL;
 331         pipe_resource_reference(&trans->transfer.resource, texture);
 332         trans->transfer.sr = sr;
 333         trans->transfer.usage = usage;
 334         trans->transfer.box = *box;
 335         trans->transfer.stride = rtex->pitch[sr.level];
 336         trans->offset = r600_texture_get_offset(rtex, sr.level, box->z, sr.face);
 337         if (rtex->depth) {
 338                 r = r600_texture_depth_flush(ctx, texture);
 339                 if (r < 0) {
 340                         R600_ERR("failed to create temporary texture to hold untiled copy\n");
 341                         pipe_resource_reference(&trans->transfer.resource, NULL);
 342                         FREE(trans);
 343                         return NULL;
 344                 }
 345         } else if (rtex->tiled) {
 346                 resource.target = PIPE_TEXTURE_2D;
 347                 resource.format = texture->format;
 348                 resource.width0 = box->width;
 349                 resource.height0 = box->height;
 350                 resource.depth0 = 1;
 351                 resource.last_level = 0;
 352                 resource.nr_samples = 0;
 353                 resource.usage = PIPE_USAGE_DYNAMIC;
 354                 resource.bind = 0;
 355                 resource.flags = 0;
 356                 /* For texture reading, the temporary (detiled) texture is used as
 357                  * a render target when blitting from a tiled texture. */
 358                 if (usage & PIPE_TRANSFER_READ) {
 359                         resource.bind |= PIPE_BIND_RENDER_TARGET;
 360                 }
 361                 /* For texture writing, the temporary texture is used as a sampler
 362                  * when blitting into a tiled texture. */
 363                 if (usage & PIPE_TRANSFER_WRITE) {
 364                         resource.bind |= PIPE_BIND_SAMPLER_VIEW;
 365                 }
 366                 /* Create the temporary texture. */
 367                 trans->linear_texture = ctx->screen->resource_create(ctx->screen, &resource);
 368                 if (trans->linear_texture == NULL) {
 369                         R600_ERR("failed to create temporary texture to hold untiled copy\n");
 370                         pipe_resource_reference(&trans->transfer.resource, NULL);
 371                         FREE(trans);
 372                         return NULL;
 373                 }
 374                 if (usage & PIPE_TRANSFER_READ) {
 375                         /* We cannot map a tiled texture directly because the data is
 376                          * in a different order, therefore we do detiling using a blit. */
 377                         r600_copy_from_tiled_texture(ctx, trans);
 378                         /* Always referenced in the blit. */
 379                         ctx->flush(ctx, 0, NULL);
 380                 }
 381         }
 382         return &trans->transfer;
 383 }
 384
 385 void r600_texture_transfer_destroy(struct pipe_context *ctx,
 386                                    struct pipe_transfer *transfer)
 387 {
 388         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 389         struct r600_resource_texture *rtex = (struct r600_resource_texture*)transfer->resource;
 390
 391         if (rtransfer->linear_texture) {
 392                 if (transfer->usage & PIPE_TRANSFER_WRITE) {
 393                         r600_copy_into_tiled_texture(ctx, rtransfer);
 394                 }
 395                 pipe_resource_reference(&rtransfer->linear_texture, NULL);
 396         }
 397         if (rtex->flushed_depth_texture) {
 398                 pipe_resource_reference((struct pipe_resource **)&rtex->flushed_depth_texture, NULL);
 399         }
 400         pipe_resource_reference(&transfer->resource, NULL);
 401         FREE(transfer);
 402 }
 403
 404 void* r600_texture_transfer_map(struct pipe_context *ctx,
 405                                 struct pipe_transfer* transfer)
 406 {
 407         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 408         struct r600_bo *bo;
 409         enum pipe_format format = transfer->resource->format;
 410         struct radeon *radeon = (struct radeon *)ctx->screen->winsys;
 411         unsigned long offset = 0;
 412         char *map;
 413
 414         if (rtransfer->linear_texture) {
 415                 bo = ((struct r600_resource *)rtransfer->linear_texture)->bo;
 416         } else {
 417                 struct r600_resource_texture *rtex = (struct r600_resource_texture*)transfer->resource;
 418
 419                 if (rtex->flushed_depth_texture)
 420                         bo = ((struct r600_resource *)rtex->flushed_depth_texture)->bo;
 421                 else
 422                         bo = ((struct r600_resource *)transfer->resource)->bo;
 423
 424                 offset = rtransfer->offset +
 425                         transfer->box.y / util_format_get_blockheight(format) * transfer->stride +
 426                         transfer->box.x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 427         }
 428         map = r600_bo_map(radeon, bo, 0, ctx);
 429         if (!map) {
 430                 return NULL;
 431         }
 432
 433         return map + offset;
 434 }
 435
 436 void r600_texture_transfer_unmap(struct pipe_context *ctx,
 437                                  struct pipe_transfer* transfer)
 438 {
 439         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 440         struct radeon *radeon = (struct radeon *)ctx->screen->winsys;
 441         struct r600_bo *bo;
 442
 443         if (rtransfer->linear_texture) {
 444                 bo = ((struct r600_resource *)rtransfer->linear_texture)->bo;
 445         } else {
 446                 struct r600_resource_texture *rtex = (struct r600_resource_texture*)transfer->resource;
 447
 448                 if (rtex->flushed_depth_texture) {
 449                         bo = ((struct r600_resource *)rtex->flushed_depth_texture)->bo;
 450                 } else {
 451                         bo = ((struct r600_resource *)transfer->resource)->bo;
 452                 }
 453         }
 454         r600_bo_unmap(radeon, bo);
 455 }
 456
 457 struct u_resource_vtbl r600_texture_vtbl =
 458 {
 459         u_default_resource_get_handle,  /* get_handle */
 460         r600_texture_destroy,           /* resource_destroy */
 461         r600_texture_is_referenced,     /* is_resource_referenced */
 462         r600_texture_get_transfer,      /* get_transfer */
 463         r600_texture_transfer_destroy,  /* transfer_destroy */
 464         r600_texture_transfer_map,      /* transfer_map */
 465         u_default_transfer_flush_region,/* transfer_flush_region */
 466         r600_texture_transfer_unmap,    /* transfer_unmap */
 467         u_default_transfer_inline_write /* transfer_inline_write */
 468 };
 469
 470 void r600_init_screen_texture_functions(struct pipe_screen *screen)
 471 {
 472         screen->get_tex_surface = r600_get_tex_surface;
 473         screen->tex_surface_destroy = r600_tex_surface_destroy;
 474 }
 475
 476 static unsigned r600_get_swizzle_combined(const unsigned char *swizzle_format,
 477                 const unsigned char *swizzle_view)
 478 {
 479         unsigned i;
 480         unsigned char swizzle[4];
 481         unsigned result = 0;
 482         const uint32_t swizzle_shift[4] = {
 483                 16, 19, 22, 25,
 484         };
 485         const uint32_t swizzle_bit[4] = {
 486                 0, 1, 2, 3,
 487         };
 488
 489         if (swizzle_view) {
 490                 /* Combine two sets of swizzles. */
 491                 for (i = 0; i < 4; i++) {
 492                         swizzle[i] = swizzle_view[i] <= UTIL_FORMAT_SWIZZLE_W ?
 493                                 swizzle_format[swizzle_view[i]] : swizzle_view[i];
 494                 }
 495         } else {
 496                 memcpy(swizzle, swizzle_format, 4);
 497         }
 498
 499         /* Get swizzle. */
 500         for (i = 0; i < 4; i++) {
 501                 switch (swizzle[i]) {
 502                 case UTIL_FORMAT_SWIZZLE_Y:
 503                         result |= swizzle_bit[1] << swizzle_shift[i];
 504                         break;
 505                 case UTIL_FORMAT_SWIZZLE_Z:
 506                         result |= swizzle_bit[2] << swizzle_shift[i];
 507                         break;
 508                 case UTIL_FORMAT_SWIZZLE_W:
 509                         result |= swizzle_bit[3] << swizzle_shift[i];
 510                         break;
 511                 case UTIL_FORMAT_SWIZZLE_0:
 512                         result |= V_038010_SQ_SEL_0 << swizzle_shift[i];
 513                         break;
 514                 case UTIL_FORMAT_SWIZZLE_1:
 515                         result |= V_038010_SQ_SEL_1 << swizzle_shift[i];
 516                         break;
 517                 default: /* UTIL_FORMAT_SWIZZLE_X */
 518                         result |= swizzle_bit[0] << swizzle_shift[i];
 519                 }
 520         }
 521         return result;
 522 }
 523
 524 /* texture format translate */
 525 uint32_t r600_translate_texformat(enum pipe_format format,
 526                                   const unsigned char *swizzle_view,
 527                                   uint32_t *word4_p, uint32_t *yuv_format_p)
 528 {
 529         uint32_t result = 0, word4 = 0, yuv_format = 0;
 530         const struct util_format_description *desc;
 531         boolean uniform = TRUE;
 532         int i;
 533         const uint32_t sign_bit[4] = {
 534                 S_038010_FORMAT_COMP_X(V_038010_SQ_FORMAT_COMP_SIGNED),
 535                 S_038010_FORMAT_COMP_Y(V_038010_SQ_FORMAT_COMP_SIGNED),
 536                 S_038010_FORMAT_COMP_Z(V_038010_SQ_FORMAT_COMP_SIGNED),
 537                 S_038010_FORMAT_COMP_W(V_038010_SQ_FORMAT_COMP_SIGNED)
 538         };
 539         desc = util_format_description(format);
 540
 541         word4 |= r600_get_swizzle_combined(desc->swizzle, swizzle_view);
 542
 543         /* Colorspace (return non-RGB formats directly). */
 544         switch (desc->colorspace) {
 545                 /* Depth stencil formats */
 546         case UTIL_FORMAT_COLORSPACE_ZS:
 547                 switch (format) {
 548                 case PIPE_FORMAT_Z16_UNORM:
 549                         result = V_0280A0_COLOR_16;
 550                         goto out_word4;
 551                 case PIPE_FORMAT_X24S8_USCALED:
 552                         word4 |= S_038010_NUM_FORMAT_ALL(V_038010_SQ_NUM_FORMAT_INT);
 553                 case PIPE_FORMAT_Z24X8_UNORM:
 554                 case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
 555                         result = V_0280A0_COLOR_8_24;
 556                         goto out_word4;
 557                 case PIPE_FORMAT_S8X24_USCALED:
 558                         word4 |= S_038010_NUM_FORMAT_ALL(V_038010_SQ_NUM_FORMAT_INT);
 559                 case PIPE_FORMAT_X8Z24_UNORM:
 560                 case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
 561                         result = V_0280A0_COLOR_24_8;
 562                         goto out_word4;
 563                 case PIPE_FORMAT_S8_USCALED:
 564                         result = V_0280A0_COLOR_8;
 565                         word4 |= S_038010_NUM_FORMAT_ALL(V_038010_SQ_NUM_FORMAT_INT);
 566                         goto out_word4;
 567                 default:
 568                         goto out_unknown;
 569                 }
 570
 571         case UTIL_FORMAT_COLORSPACE_YUV:
 572                 yuv_format |= (1 << 30);
 573                 switch (format) {
 574                 case PIPE_FORMAT_UYVY:
 575                 case PIPE_FORMAT_YUYV:
 576                 default:
 577                         break;
 578                 }
 579                 goto out_unknown; /* TODO */
 580
 581         case UTIL_FORMAT_COLORSPACE_SRGB:
 582                 word4 |= S_038010_FORCE_DEGAMMA(1);
 583                 if (format == PIPE_FORMAT_L8A8_SRGB || format == PIPE_FORMAT_L8_SRGB)
 584                         goto out_unknown; /* fails for some reason - TODO */
 585                 break;
 586
 587         default:
 588                 break;
 589         }
 590
 591         /* S3TC formats. TODO */
 592         if (desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 593                 goto out_unknown;
 594         }
 595
 596
 597         for (i = 0; i < desc->nr_channels; i++) {
 598                 if (desc->channel[i].type == UTIL_FORMAT_TYPE_SIGNED) {
 599                         word4 |= sign_bit[i];
 600                 }
 601         }
 602
 603         /* R8G8Bx_SNORM - TODO CxV8U8 */
 604
 605         /* RGTC - TODO */
 606
 607         /* See whether the components are of the same size. */
 608         for (i = 1; i < desc->nr_channels; i++) {
 609                 uniform = uniform && desc->channel[0].size == desc->channel[i].size;
 610         }
 611
 612         /* Non-uniform formats. */
 613         if (!uniform) {
 614                 switch(desc->nr_channels) {
 615                 case 3:
 616                         if (desc->channel[0].size == 5 &&
 617                             desc->channel[1].size == 6 &&
 618                             desc->channel[2].size == 5) {
 619                                 result = V_0280A0_COLOR_5_6_5;
 620                                 goto out_word4;
 621                         }
 622                         goto out_unknown;
 623                 case 4:
 624                         if (desc->channel[0].size == 5 &&
 625                             desc->channel[1].size == 5 &&
 626                             desc->channel[2].size == 5 &&
 627                             desc->channel[3].size == 1) {
 628                                 result = V_0280A0_COLOR_1_5_5_5;
 629                                 goto out_word4;
 630                         }
 631                         if (desc->channel[0].size == 10 &&
 632                             desc->channel[1].size == 10 &&
 633                             desc->channel[2].size == 10 &&
 634                             desc->channel[3].size == 2) {
 635                                 result = V_0280A0_COLOR_10_10_10_2;
 636                                 goto out_word4;
 637                         }
 638                         goto out_unknown;
 639                 }
 640                 goto out_unknown;
 641         }
 642
 643         /* Find the first non-VOID channel. */
 644         for (i = 0; i < 4; i++) {
 645                 if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 646                         break;
 647                 }
 648         }
 649
 650         if (i == 4)
 651                 goto out_unknown;
 652
 653         /* uniform formats */
 654         switch (desc->channel[i].type) {
 655         case UTIL_FORMAT_TYPE_UNSIGNED:
 656         case UTIL_FORMAT_TYPE_SIGNED:
 657                 if (!desc->channel[i].normalized &&
 658                     desc->colorspace != UTIL_FORMAT_COLORSPACE_SRGB) {
 659                         goto out_unknown;
 660                 }
 661
 662                 switch (desc->channel[i].size) {
 663                 case 4:
 664                         switch (desc->nr_channels) {
 665                         case 2:
 666                                 result = V_0280A0_COLOR_4_4;
 667                                 goto out_word4;
 668                         case 4:
 669                                 result = V_0280A0_COLOR_4_4_4_4;
 670                                 goto out_word4;
 671                         }
 672                         goto out_unknown;
 673                 case 8:
 674                         switch (desc->nr_channels) {
 675                         case 1:
 676                                 result = V_0280A0_COLOR_8;
 677                                 goto out_word4;
 678                         case 2:
 679                                 result = V_0280A0_COLOR_8_8;
 680                                 goto out_word4;
 681                         case 4:
 682                                 result = V_0280A0_COLOR_8_8_8_8;
 683                                 goto out_word4;
 684                         }
 685                         goto out_unknown;
 686                 case 16:
 687                         switch (desc->nr_channels) {
 688                         case 1:
 689                                 result = V_0280A0_COLOR_16;
 690                                 goto out_word4;
 691                         case 2:
 692                                 result = V_0280A0_COLOR_16_16;
 693                                 goto out_word4;
 694                         case 4:
 695                                 result = V_0280A0_COLOR_16_16_16_16;
 696                                 goto out_word4;
 697                         }
 698                 }
 699                 goto out_unknown;
 700
 701         case UTIL_FORMAT_TYPE_FLOAT:
 702                 switch (desc->channel[i].size) {
 703                 case 16:
 704                         switch (desc->nr_channels) {
 705                         case 1:
 706                                 result = V_0280A0_COLOR_16_FLOAT;
 707                                 goto out_word4;
 708                         case 2:
 709                                 result = V_0280A0_COLOR_16_16_FLOAT;
 710                                 goto out_word4;
 711                         case 4:
 712                                 result = V_0280A0_COLOR_16_16_16_16_FLOAT;
 713                                 goto out_word4;
 714                         }
 715                         goto out_unknown;
 716                 case 32:
 717                         switch (desc->nr_channels) {
 718                         case 1:
 719                                 result = V_0280A0_COLOR_32_FLOAT;
 720                                 goto out_word4;
 721                         case 2:
 722                                 result = V_0280A0_COLOR_32_32_FLOAT;
 723                                 goto out_word4;
 724                         case 4:
 725                                 result = V_0280A0_COLOR_32_32_32_32_FLOAT;
 726                                 goto out_word4;
 727                         }
 728                 }
 729
 730         }
 731 out_word4:
 732         if (word4_p)
 733                 *word4_p = word4;
 734         if (yuv_format_p)
 735                 *yuv_format_p = yuv_format;
 736         return result;
 737 out_unknown:
 738 //      R600_ERR("Unable to handle texformat %d %s\n", format, util_format_name(format));
 739         return ~0;
 740 }