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