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         if (rtex->pitch_override)
 104                 return rtex->pitch_override;
 105
 106         width = u_minify(ptex->width0, level);
 107
 108         stride = util_format_get_stride(ptex->format, align(width, 64));
 109         if (chipc == EVERGREEN)
 110                 stride = align(stride, 512);
 111         else
 112                 stride = align(stride, 256);
 113         return stride;
 114 }
 115
 116 static unsigned r600_texture_get_nblocksy(struct pipe_screen *screen,
 117                                           struct r600_resource_texture *rtex,
 118                                           unsigned level)
 119 {
 120         struct pipe_resource *ptex = &rtex->resource.base.b;
 121         unsigned height;
 122
 123         height = u_minify(ptex->height0, level);
 124         height = util_next_power_of_two(height);
 125         return util_format_get_nblocksy(ptex->format, height);
 126 }
 127
 128 static void r600_setup_miptree(struct pipe_screen *screen,
 129                                struct r600_resource_texture *rtex)
 130 {
 131         struct pipe_resource *ptex = &rtex->resource.base.b;
 132         struct radeon *radeon = (struct radeon *)screen->winsys;
 133         enum chip_class chipc = r600_get_family_class(radeon);
 134         unsigned long pitch, size, layer_size, i, offset;
 135         unsigned nblocksy;
 136
 137         rtex->bpt = util_format_get_blocksize(ptex->format);
 138         for (i = 0, offset = 0; i <= ptex->last_level; i++) {
 139                 pitch = r600_texture_get_stride(screen, rtex, i);
 140                 nblocksy = r600_texture_get_nblocksy(screen, rtex, i);
 141
 142                 layer_size = pitch * nblocksy;
 143
 144                 if (ptex->target == PIPE_TEXTURE_CUBE) {
 145                         if (chipc >= R700)
 146                                 size = layer_size * 8;
 147                         else
 148                                 size = layer_size * 6;
 149                 }
 150                 else
 151                         size = layer_size * u_minify(ptex->depth0, i);
 152                 rtex->offset[i] = offset;
 153                 rtex->layer_size[i] = layer_size;
 154                 rtex->pitch[i] = pitch;
 155                 offset += size;
 156         }
 157         rtex->size = offset;
 158 }
 159
 160 static struct r600_resource_texture *
 161 r600_texture_create_object(struct pipe_screen *screen,
 162                            const struct pipe_resource *base,
 163                            unsigned array_mode,
 164                            unsigned pitch_in_bytes_override,
 165                            unsigned max_buffer_size,
 166                            struct r600_bo *bo)
 167 {
 168         struct r600_resource_texture *rtex;
 169         struct r600_resource *resource;
 170         struct radeon *radeon = (struct radeon *)screen->winsys;
 171
 172         rtex = CALLOC_STRUCT(r600_resource_texture);
 173         if (rtex == NULL)
 174                 return NULL;
 175
 176         resource = &rtex->resource;
 177         resource->base.b = *base;
 178         resource->base.vtbl = &r600_texture_vtbl;
 179         pipe_reference_init(&resource->base.b.reference, 1);
 180         resource->base.b.screen = screen;
 181         resource->bo = bo;
 182         resource->domain = r600_domain_from_usage(resource->base.b.bind);
 183         rtex->pitch_override = pitch_in_bytes_override;
 184         rtex->array_mode = array_mode;
 185
 186         r600_setup_miptree(screen, rtex);
 187
 188         resource->size = rtex->size;
 189
 190         if (!resource->bo) {
 191                 resource->bo = r600_bo(radeon, rtex->size, 4096, 0);
 192                 if (!resource->bo) {
 193                         FREE(rtex);
 194                         return NULL;
 195                 }
 196         }
 197         return rtex;
 198 }
 199
 200 struct pipe_resource *r600_texture_create(struct pipe_screen *screen,
 201                                                 const struct pipe_resource *templ)
 202 {
 203         unsigned array_mode = 0;
 204
 205         return (struct pipe_resource *)r600_texture_create_object(screen, templ, array_mode,
 206                                                                   0, 0, NULL);
 207
 208 }
 209
 210 static void r600_texture_destroy(struct pipe_screen *screen,
 211                                  struct pipe_resource *ptex)
 212 {
 213         struct r600_resource_texture *rtex = (struct r600_resource_texture*)ptex;
 214         struct r600_resource *resource = &rtex->resource;
 215         struct radeon *radeon = (struct radeon *)screen->winsys;
 216
 217         if (rtex->flushed_depth_texture)
 218                 pipe_resource_reference((struct pipe_resource **)&rtex->flushed_depth_texture, NULL);
 219
 220         if (resource->bo) {
 221                 r600_bo_reference(radeon, &resource->bo, NULL);
 222         }
 223         FREE(rtex);
 224 }
 225
 226 static struct pipe_surface *r600_get_tex_surface(struct pipe_screen *screen,
 227                                                 struct pipe_resource *texture,
 228                                                 unsigned face, unsigned level,
 229                                                 unsigned zslice, unsigned flags)
 230 {
 231         struct r600_resource_texture *rtex = (struct r600_resource_texture*)texture;
 232         struct pipe_surface *surface = CALLOC_STRUCT(pipe_surface);
 233         unsigned long offset;
 234
 235         if (surface == NULL)
 236                 return NULL;
 237         offset = r600_texture_get_offset(rtex, level, zslice, face);
 238         pipe_reference_init(&surface->reference, 1);
 239         pipe_resource_reference(&surface->texture, texture);
 240         surface->format = texture->format;
 241         surface->width = u_minify(texture->width0, level);
 242         surface->height = u_minify(texture->height0, level);
 243         surface->offset = offset;
 244         surface->usage = flags;
 245         surface->zslice = zslice;
 246         surface->texture = texture;
 247         surface->face = face;
 248         surface->level = level;
 249         return surface;
 250 }
 251
 252 static void r600_tex_surface_destroy(struct pipe_surface *surface)
 253 {
 254         pipe_resource_reference(&surface->texture, NULL);
 255         FREE(surface);
 256 }
 257
 258
 259 struct pipe_resource *r600_texture_from_handle(struct pipe_screen *screen,
 260                                                const struct pipe_resource *templ,
 261                                                struct winsys_handle *whandle)
 262 {
 263         struct radeon *rw = (struct radeon*)screen->winsys;
 264         struct r600_bo *bo = NULL;
 265
 266         /* Support only 2D textures without mipmaps */
 267         if ((templ->target != PIPE_TEXTURE_2D && templ->target != PIPE_TEXTURE_RECT) ||
 268               templ->depth0 != 1 || templ->last_level != 0)
 269                 return NULL;
 270
 271         bo = r600_bo_handle(rw, whandle->handle);
 272         if (bo == NULL) {
 273                 return NULL;
 274         }
 275
 276         return (struct pipe_resource *)r600_texture_create_object(screen, templ, 0,
 277                                                                   whandle->stride,
 278                                                                   0,
 279                                                                   bo);
 280 }
 281
 282 static unsigned int r600_texture_is_referenced(struct pipe_context *context,
 283                                                 struct pipe_resource *texture,
 284                                                 unsigned face, unsigned level)
 285 {
 286         /* FIXME */
 287         return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 288 }
 289
 290 int (*r600_blit_uncompress_depth_ptr)(struct pipe_context *ctx, struct r600_resource_texture *texture);
 291
 292 int r600_texture_depth_flush(struct pipe_context *ctx,
 293                              struct pipe_resource *texture)
 294 {
 295         struct r600_resource_texture *rtex = (struct r600_resource_texture*)texture;
 296         struct pipe_resource resource;
 297
 298         if (rtex->flushed_depth_texture)
 299                 goto out;
 300
 301         resource.target = PIPE_TEXTURE_2D;
 302         resource.format = texture->format;
 303         resource.width0 = texture->width0;
 304         resource.height0 = texture->height0;
 305         resource.depth0 = 1;
 306         resource.last_level = 0;
 307         resource.nr_samples = 0;
 308         resource.usage = PIPE_USAGE_DYNAMIC;
 309         resource.bind = 0;
 310         resource.flags = 0;
 311
 312         resource.bind |= PIPE_BIND_RENDER_TARGET;
 313
 314         rtex->flushed_depth_texture = (struct r600_resource_texture *)ctx->screen->resource_create(ctx->screen, &resource);
 315         if (rtex->flushed_depth_texture == NULL) {
 316                 R600_ERR("failed to create temporary texture to hold untiled copy\n");
 317                 return -ENOMEM;
 318         }
 319
 320 out:
 321         r600_blit_uncompress_depth_ptr(ctx, rtex);
 322         return 0;
 323 }
 324
 325 struct pipe_transfer* r600_texture_get_transfer(struct pipe_context *ctx,
 326                                                 struct pipe_resource *texture,
 327                                                 struct pipe_subresource sr,
 328                                                 unsigned usage,
 329                                                 const struct pipe_box *box)
 330 {
 331         struct r600_resource_texture *rtex = (struct r600_resource_texture*)texture;
 332         struct pipe_resource resource;
 333         struct r600_transfer *trans;
 334         int r;
 335
 336         trans = CALLOC_STRUCT(r600_transfer);
 337         if (trans == NULL)
 338                 return NULL;
 339         pipe_resource_reference(&trans->transfer.resource, texture);
 340         trans->transfer.sr = sr;
 341         trans->transfer.usage = usage;
 342         trans->transfer.box = *box;
 343         trans->transfer.stride = rtex->pitch[sr.level];
 344         trans->offset = r600_texture_get_offset(rtex, sr.level, box->z, sr.face);
 345         if (rtex->depth) {
 346                 r = r600_texture_depth_flush(ctx, texture);
 347                 if (r < 0) {
 348                         R600_ERR("failed to create temporary texture to hold untiled copy\n");
 349                         pipe_resource_reference(&trans->transfer.resource, NULL);
 350                         FREE(trans);
 351                         return NULL;
 352                 }
 353         } else if (rtex->tiled) {
 354                 resource.target = PIPE_TEXTURE_2D;
 355                 resource.format = texture->format;
 356                 resource.width0 = box->width;
 357                 resource.height0 = box->height;
 358                 resource.depth0 = 1;
 359                 resource.last_level = 0;
 360                 resource.nr_samples = 0;
 361                 resource.usage = PIPE_USAGE_DYNAMIC;
 362                 resource.bind = 0;
 363                 resource.flags = 0;
 364                 /* For texture reading, the temporary (detiled) texture is used as
 365                  * a render target when blitting from a tiled texture. */
 366                 if (usage & PIPE_TRANSFER_READ) {
 367                         resource.bind |= PIPE_BIND_RENDER_TARGET;
 368                 }
 369                 /* For texture writing, the temporary texture is used as a sampler
 370                  * when blitting into a tiled texture. */
 371                 if (usage & PIPE_TRANSFER_WRITE) {
 372                         resource.bind |= PIPE_BIND_SAMPLER_VIEW;
 373                 }
 374                 /* Create the temporary texture. */
 375                 trans->linear_texture = ctx->screen->resource_create(ctx->screen, &resource);
 376                 if (trans->linear_texture == NULL) {
 377                         R600_ERR("failed to create temporary texture to hold untiled copy\n");
 378                         pipe_resource_reference(&trans->transfer.resource, NULL);
 379                         FREE(trans);
 380                         return NULL;
 381                 }
 382                 if (usage & PIPE_TRANSFER_READ) {
 383                         /* We cannot map a tiled texture directly because the data is
 384                          * in a different order, therefore we do detiling using a blit. */
 385                         r600_copy_from_tiled_texture(ctx, trans);
 386                         /* Always referenced in the blit. */
 387                         ctx->flush(ctx, 0, NULL);
 388                 }
 389         }
 390         return &trans->transfer;
 391 }
 392
 393 void r600_texture_transfer_destroy(struct pipe_context *ctx,
 394                                    struct pipe_transfer *transfer)
 395 {
 396         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 397         struct r600_resource_texture *rtex = (struct r600_resource_texture*)transfer->resource;
 398
 399         if (rtransfer->linear_texture) {
 400                 if (transfer->usage & PIPE_TRANSFER_WRITE) {
 401                         r600_copy_into_tiled_texture(ctx, rtransfer);
 402                 }
 403                 pipe_resource_reference(&rtransfer->linear_texture, NULL);
 404         }
 405         if (rtex->flushed_depth_texture) {
 406                 pipe_resource_reference((struct pipe_resource **)&rtex->flushed_depth_texture, NULL);
 407         }
 408         pipe_resource_reference(&transfer->resource, NULL);
 409         FREE(transfer);
 410 }
 411
 412 void* r600_texture_transfer_map(struct pipe_context *ctx,
 413                                 struct pipe_transfer* transfer)
 414 {
 415         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 416         struct r600_bo *bo;
 417         enum pipe_format format = transfer->resource->format;
 418         struct radeon *radeon = (struct radeon *)ctx->screen->winsys;
 419         unsigned long offset = 0;
 420         char *map;
 421
 422         if (rtransfer->linear_texture) {
 423                 bo = ((struct r600_resource *)rtransfer->linear_texture)->bo;
 424         } else {
 425                 struct r600_resource_texture *rtex = (struct r600_resource_texture*)transfer->resource;
 426
 427                 if (rtex->flushed_depth_texture)
 428                         bo = ((struct r600_resource *)rtex->flushed_depth_texture)->bo;
 429                 else
 430                         bo = ((struct r600_resource *)transfer->resource)->bo;
 431
 432                 offset = rtransfer->offset +
 433                         transfer->box.y / util_format_get_blockheight(format) * transfer->stride +
 434                         transfer->box.x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 435         }
 436         map = r600_bo_map(radeon, bo, 0, ctx);
 437         if (!map) {
 438                 return NULL;
 439         }
 440
 441         return map + offset;
 442 }
 443
 444 void r600_texture_transfer_unmap(struct pipe_context *ctx,
 445                                  struct pipe_transfer* transfer)
 446 {
 447         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 448         struct radeon *radeon = (struct radeon *)ctx->screen->winsys;
 449         struct r600_bo *bo;
 450
 451         if (rtransfer->linear_texture) {
 452                 bo = ((struct r600_resource *)rtransfer->linear_texture)->bo;
 453         } else {
 454                 struct r600_resource_texture *rtex = (struct r600_resource_texture*)transfer->resource;
 455
 456                 if (rtex->flushed_depth_texture) {
 457                         bo = ((struct r600_resource *)rtex->flushed_depth_texture)->bo;
 458                 } else {
 459                         bo = ((struct r600_resource *)transfer->resource)->bo;
 460                 }
 461         }
 462         r600_bo_unmap(radeon, bo);
 463 }
 464
 465 struct u_resource_vtbl r600_texture_vtbl =
 466 {
 467         u_default_resource_get_handle,  /* get_handle */
 468         r600_texture_destroy,           /* resource_destroy */
 469         r600_texture_is_referenced,     /* is_resource_referenced */
 470         r600_texture_get_transfer,      /* get_transfer */
 471         r600_texture_transfer_destroy,  /* transfer_destroy */
 472         r600_texture_transfer_map,      /* transfer_map */
 473         u_default_transfer_flush_region,/* transfer_flush_region */
 474         r600_texture_transfer_unmap,    /* transfer_unmap */
 475         u_default_transfer_inline_write /* transfer_inline_write */
 476 };
 477
 478 void r600_init_screen_texture_functions(struct pipe_screen *screen)
 479 {
 480         screen->get_tex_surface = r600_get_tex_surface;
 481         screen->tex_surface_destroy = r600_tex_surface_destroy;
 482 }
 483
 484 static unsigned r600_get_swizzle_combined(const unsigned char *swizzle_format,
 485                 const unsigned char *swizzle_view)
 486 {
 487         unsigned i;
 488         unsigned char swizzle[4];
 489         unsigned result = 0;
 490         const uint32_t swizzle_shift[4] = {
 491                 16, 19, 22, 25,
 492         };
 493         const uint32_t swizzle_bit[4] = {
 494                 0, 1, 2, 3,
 495         };
 496
 497         if (swizzle_view) {
 498                 /* Combine two sets of swizzles. */
 499                 for (i = 0; i < 4; i++) {
 500                         swizzle[i] = swizzle_view[i] <= UTIL_FORMAT_SWIZZLE_W ?
 501                                 swizzle_format[swizzle_view[i]] : swizzle_view[i];
 502                 }
 503         } else {
 504                 memcpy(swizzle, swizzle_format, 4);
 505         }
 506
 507         /* Get swizzle. */
 508         for (i = 0; i < 4; i++) {
 509                 switch (swizzle[i]) {
 510                 case UTIL_FORMAT_SWIZZLE_Y:
 511                         result |= swizzle_bit[1] << swizzle_shift[i];
 512                         break;
 513                 case UTIL_FORMAT_SWIZZLE_Z:
 514                         result |= swizzle_bit[2] << swizzle_shift[i];
 515                         break;
 516                 case UTIL_FORMAT_SWIZZLE_W:
 517                         result |= swizzle_bit[3] << swizzle_shift[i];
 518                         break;
 519                 case UTIL_FORMAT_SWIZZLE_0:
 520                         result |= V_038010_SQ_SEL_0 << swizzle_shift[i];
 521                         break;
 522                 case UTIL_FORMAT_SWIZZLE_1:
 523                         result |= V_038010_SQ_SEL_1 << swizzle_shift[i];
 524                         break;
 525                 default: /* UTIL_FORMAT_SWIZZLE_X */
 526                         result |= swizzle_bit[0] << swizzle_shift[i];
 527                 }
 528         }
 529         return result;
 530 }
 531
 532 /* texture format translate */
 533 uint32_t r600_translate_texformat(enum pipe_format format,
 534                                   const unsigned char *swizzle_view,
 535                                   uint32_t *word4_p, uint32_t *yuv_format_p)
 536 {
 537         uint32_t result = 0, word4 = 0, yuv_format = 0;
 538         const struct util_format_description *desc;
 539         boolean uniform = TRUE;
 540         int i;
 541         const uint32_t sign_bit[4] = {
 542                 S_038010_FORMAT_COMP_X(V_038010_SQ_FORMAT_COMP_SIGNED),
 543                 S_038010_FORMAT_COMP_Y(V_038010_SQ_FORMAT_COMP_SIGNED),
 544                 S_038010_FORMAT_COMP_Z(V_038010_SQ_FORMAT_COMP_SIGNED),
 545                 S_038010_FORMAT_COMP_W(V_038010_SQ_FORMAT_COMP_SIGNED)
 546         };
 547         desc = util_format_description(format);
 548
 549         word4 |= r600_get_swizzle_combined(desc->swizzle, swizzle_view);
 550
 551         /* Colorspace (return non-RGB formats directly). */
 552         switch (desc->colorspace) {
 553                 /* Depth stencil formats */
 554         case UTIL_FORMAT_COLORSPACE_ZS:
 555                 switch (format) {
 556                 case PIPE_FORMAT_Z16_UNORM:
 557                         result = V_0280A0_COLOR_16;
 558                         goto out_word4;
 559                 case PIPE_FORMAT_X24S8_USCALED:
 560                         word4 |= S_038010_NUM_FORMAT_ALL(V_038010_SQ_NUM_FORMAT_INT);
 561                 case PIPE_FORMAT_Z24X8_UNORM:
 562                 case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
 563                         result = V_0280A0_COLOR_8_24;
 564                         goto out_word4;
 565                 case PIPE_FORMAT_S8X24_USCALED:
 566                         word4 |= S_038010_NUM_FORMAT_ALL(V_038010_SQ_NUM_FORMAT_INT);
 567                 case PIPE_FORMAT_X8Z24_UNORM:
 568                 case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
 569                         result = V_0280A0_COLOR_24_8;
 570                         goto out_word4;
 571                 case PIPE_FORMAT_S8_USCALED:
 572                         result = V_0280A0_COLOR_8;
 573                         word4 |= S_038010_NUM_FORMAT_ALL(V_038010_SQ_NUM_FORMAT_INT);
 574                         goto out_word4;
 575                 default:
 576                         goto out_unknown;
 577                 }
 578
 579         case UTIL_FORMAT_COLORSPACE_YUV:
 580                 yuv_format |= (1 << 30);
 581                 switch (format) {
 582                 case PIPE_FORMAT_UYVY:
 583                 case PIPE_FORMAT_YUYV:
 584                 default:
 585                         break;
 586                 }
 587                 goto out_unknown; /* TODO */
 588
 589         case UTIL_FORMAT_COLORSPACE_SRGB:
 590                 word4 |= S_038010_FORCE_DEGAMMA(1);
 591                 if (format == PIPE_FORMAT_L8A8_SRGB || format == PIPE_FORMAT_L8_SRGB)
 592                         goto out_unknown; /* fails for some reason - TODO */
 593                 break;
 594
 595         default:
 596                 break;
 597         }
 598
 599         /* S3TC formats. TODO */
 600         if (desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 601                 goto out_unknown;
 602         }
 603
 604
 605         for (i = 0; i < desc->nr_channels; i++) {
 606                 if (desc->channel[i].type == UTIL_FORMAT_TYPE_SIGNED) {
 607                         word4 |= sign_bit[i];
 608                 }
 609         }
 610
 611         /* R8G8Bx_SNORM - TODO CxV8U8 */
 612
 613         /* RGTC - TODO */
 614
 615         /* See whether the components are of the same size. */
 616         for (i = 1; i < desc->nr_channels; i++) {
 617                 uniform = uniform && desc->channel[0].size == desc->channel[i].size;
 618         }
 619
 620         /* Non-uniform formats. */
 621         if (!uniform) {
 622                 switch(desc->nr_channels) {
 623                 case 3:
 624                         if (desc->channel[0].size == 5 &&
 625                             desc->channel[1].size == 6 &&
 626                             desc->channel[2].size == 5) {
 627                                 result = V_0280A0_COLOR_5_6_5;
 628                                 goto out_word4;
 629                         }
 630                         goto out_unknown;
 631                 case 4:
 632                         if (desc->channel[0].size == 5 &&
 633                             desc->channel[1].size == 5 &&
 634                             desc->channel[2].size == 5 &&
 635                             desc->channel[3].size == 1) {
 636                                 result = V_0280A0_COLOR_1_5_5_5;
 637                                 goto out_word4;
 638                         }
 639                         if (desc->channel[0].size == 10 &&
 640                             desc->channel[1].size == 10 &&
 641                             desc->channel[2].size == 10 &&
 642                             desc->channel[3].size == 2) {
 643                                 result = V_0280A0_COLOR_10_10_10_2;
 644                                 goto out_word4;
 645                         }
 646                         goto out_unknown;
 647                 }
 648                 goto out_unknown;
 649         }
 650
 651         /* Find the first non-VOID channel. */
 652         for (i = 0; i < 4; i++) {
 653                 if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 654                         break;
 655                 }
 656         }
 657
 658         if (i == 4)
 659                 goto out_unknown;
 660
 661         /* uniform formats */
 662         switch (desc->channel[i].type) {
 663         case UTIL_FORMAT_TYPE_UNSIGNED:
 664         case UTIL_FORMAT_TYPE_SIGNED:
 665                 if (!desc->channel[i].normalized &&
 666                     desc->colorspace != UTIL_FORMAT_COLORSPACE_SRGB) {
 667                         goto out_unknown;
 668                 }
 669
 670                 switch (desc->channel[i].size) {
 671                 case 4:
 672                         switch (desc->nr_channels) {
 673                         case 2:
 674                                 result = V_0280A0_COLOR_4_4;
 675                                 goto out_word4;
 676                         case 4:
 677                                 result = V_0280A0_COLOR_4_4_4_4;
 678                                 goto out_word4;
 679                         }
 680                         goto out_unknown;
 681                 case 8:
 682                         switch (desc->nr_channels) {
 683                         case 1:
 684                                 result = V_0280A0_COLOR_8;
 685                                 goto out_word4;
 686                         case 2:
 687                                 result = V_0280A0_COLOR_8_8;
 688                                 goto out_word4;
 689                         case 4:
 690                                 result = V_0280A0_COLOR_8_8_8_8;
 691                                 goto out_word4;
 692                         }
 693                         goto out_unknown;
 694                 case 16:
 695                         switch (desc->nr_channels) {
 696                         case 1:
 697                                 result = V_0280A0_COLOR_16;
 698                                 goto out_word4;
 699                         case 2:
 700                                 result = V_0280A0_COLOR_16_16;
 701                                 goto out_word4;
 702                         case 4:
 703                                 result = V_0280A0_COLOR_16_16_16_16;
 704                                 goto out_word4;
 705                         }
 706                 }
 707                 goto out_unknown;
 708
 709         case UTIL_FORMAT_TYPE_FLOAT:
 710                 switch (desc->channel[i].size) {
 711                 case 16:
 712                         switch (desc->nr_channels) {
 713                         case 1:
 714                                 result = V_0280A0_COLOR_16_FLOAT;
 715                                 goto out_word4;
 716                         case 2:
 717                                 result = V_0280A0_COLOR_16_16_FLOAT;
 718                                 goto out_word4;
 719                         case 4:
 720                                 result = V_0280A0_COLOR_16_16_16_16_FLOAT;
 721                                 goto out_word4;
 722                         }
 723                         goto out_unknown;
 724                 case 32:
 725                         switch (desc->nr_channels) {
 726                         case 1:
 727                                 result = V_0280A0_COLOR_32_FLOAT;
 728                                 goto out_word4;
 729                         case 2:
 730                                 result = V_0280A0_COLOR_32_32_FLOAT;
 731                                 goto out_word4;
 732                         case 4:
 733                                 result = V_0280A0_COLOR_32_32_32_32_FLOAT;
 734                                 goto out_word4;
 735                         }
 736                 }
 737
 738         }
 739 out_word4:
 740         if (word4_p)
 741                 *word4_p = word4;
 742         if (yuv_format_p)
 743                 *yuv_format_p = yuv_format;
 744         return result;
 745 out_unknown:
 746 //      R600_ERR("Unable to handle texformat %d %s\n", format, util_format_name(format));
 747         return ~0;
 748 }