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 /* Get a width in pixels from a stride in bytes. */
 129 static unsigned pitch_to_width(enum pipe_format format,
 130                                 unsigned pitch_in_bytes)
 131 {
 132     return (pitch_in_bytes / util_format_get_blocksize(format)) *
 133             util_format_get_blockwidth(format);
 134 }
 135
 136 static void r600_setup_miptree(struct pipe_screen *screen,
 137                                struct r600_resource_texture *rtex)
 138 {
 139         struct pipe_resource *ptex = &rtex->resource.base.b;
 140         struct radeon *radeon = (struct radeon *)screen->winsys;
 141         enum chip_class chipc = r600_get_family_class(radeon);
 142         unsigned long pitch, size, layer_size, i, offset;
 143         unsigned nblocksy;
 144
 145         for (i = 0, offset = 0; i <= ptex->last_level; i++) {
 146                 pitch = r600_texture_get_stride(screen, rtex, i);
 147                 nblocksy = r600_texture_get_nblocksy(screen, rtex, i);
 148
 149                 layer_size = pitch * nblocksy;
 150
 151                 if (ptex->target == PIPE_TEXTURE_CUBE) {
 152                         if (chipc >= R700)
 153                                 size = layer_size * 8;
 154                         else
 155                                 size = layer_size * 6;
 156                 }
 157                 else
 158                         size = layer_size * u_minify(ptex->depth0, i);
 159                 rtex->offset[i] = offset;
 160                 rtex->layer_size[i] = layer_size;
 161                 rtex->pitch_in_bytes[i] = pitch;
 162                 rtex->pitch_in_pixels[i] = pitch_to_width(ptex->format, pitch);
 163                 offset += size;
 164         }
 165         rtex->size = offset;
 166 }
 167
 168 static struct r600_resource_texture *
 169 r600_texture_create_object(struct pipe_screen *screen,
 170                            const struct pipe_resource *base,
 171                            unsigned array_mode,
 172                            unsigned pitch_in_bytes_override,
 173                            unsigned max_buffer_size,
 174                            struct r600_bo *bo)
 175 {
 176         struct r600_resource_texture *rtex;
 177         struct r600_resource *resource;
 178         struct radeon *radeon = (struct radeon *)screen->winsys;
 179
 180         rtex = CALLOC_STRUCT(r600_resource_texture);
 181         if (rtex == NULL)
 182                 return NULL;
 183
 184         resource = &rtex->resource;
 185         resource->base.b = *base;
 186         resource->base.vtbl = &r600_texture_vtbl;
 187         pipe_reference_init(&resource->base.b.reference, 1);
 188         resource->base.b.screen = screen;
 189         resource->bo = bo;
 190         resource->domain = r600_domain_from_usage(resource->base.b.bind);
 191         rtex->pitch_override = pitch_in_bytes_override;
 192         rtex->array_mode = array_mode;
 193
 194         r600_setup_miptree(screen, rtex);
 195
 196         resource->size = rtex->size;
 197
 198         if (!resource->bo) {
 199                 resource->bo = r600_bo(radeon, rtex->size, 4096, 0);
 200                 if (!resource->bo) {
 201                         FREE(rtex);
 202                         return NULL;
 203                 }
 204         }
 205         return rtex;
 206 }
 207
 208 struct pipe_resource *r600_texture_create(struct pipe_screen *screen,
 209                                                 const struct pipe_resource *templ)
 210 {
 211         unsigned array_mode = 0;
 212
 213         return (struct pipe_resource *)r600_texture_create_object(screen, templ, array_mode,
 214                                                                   0, 0, NULL);
 215
 216 }
 217
 218 static void r600_texture_destroy(struct pipe_screen *screen,
 219                                  struct pipe_resource *ptex)
 220 {
 221         struct r600_resource_texture *rtex = (struct r600_resource_texture*)ptex;
 222         struct r600_resource *resource = &rtex->resource;
 223         struct radeon *radeon = (struct radeon *)screen->winsys;
 224
 225         if (rtex->flushed_depth_texture)
 226                 pipe_resource_reference((struct pipe_resource **)&rtex->flushed_depth_texture, NULL);
 227
 228         if (resource->bo) {
 229                 r600_bo_reference(radeon, &resource->bo, NULL);
 230         }
 231         FREE(rtex);
 232 }
 233
 234 static struct pipe_surface *r600_get_tex_surface(struct pipe_screen *screen,
 235                                                 struct pipe_resource *texture,
 236                                                 unsigned face, unsigned level,
 237                                                 unsigned zslice, unsigned flags)
 238 {
 239         struct r600_resource_texture *rtex = (struct r600_resource_texture*)texture;
 240         struct pipe_surface *surface = CALLOC_STRUCT(pipe_surface);
 241         unsigned long offset;
 242
 243         if (surface == NULL)
 244                 return NULL;
 245         offset = r600_texture_get_offset(rtex, level, zslice, face);
 246         pipe_reference_init(&surface->reference, 1);
 247         pipe_resource_reference(&surface->texture, texture);
 248         surface->format = texture->format;
 249         surface->width = u_minify(texture->width0, level);
 250         surface->height = u_minify(texture->height0, level);
 251         surface->offset = offset;
 252         surface->usage = flags;
 253         surface->zslice = zslice;
 254         surface->texture = texture;
 255         surface->face = face;
 256         surface->level = level;
 257         return surface;
 258 }
 259
 260 static void r600_tex_surface_destroy(struct pipe_surface *surface)
 261 {
 262         pipe_resource_reference(&surface->texture, NULL);
 263         FREE(surface);
 264 }
 265
 266
 267 struct pipe_resource *r600_texture_from_handle(struct pipe_screen *screen,
 268                                                const struct pipe_resource *templ,
 269                                                struct winsys_handle *whandle)
 270 {
 271         struct radeon *rw = (struct radeon*)screen->winsys;
 272         struct r600_bo *bo = NULL;
 273
 274         /* Support only 2D textures without mipmaps */
 275         if ((templ->target != PIPE_TEXTURE_2D && templ->target != PIPE_TEXTURE_RECT) ||
 276               templ->depth0 != 1 || templ->last_level != 0)
 277                 return NULL;
 278
 279         bo = r600_bo_handle(rw, whandle->handle);
 280         if (bo == NULL) {
 281                 return NULL;
 282         }
 283
 284         return (struct pipe_resource *)r600_texture_create_object(screen, templ, 0,
 285                                                                   whandle->stride,
 286                                                                   0,
 287                                                                   bo);
 288 }
 289
 290 static unsigned int r600_texture_is_referenced(struct pipe_context *context,
 291                                                 struct pipe_resource *texture,
 292                                                 unsigned face, unsigned level)
 293 {
 294         /* FIXME */
 295         return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 296 }
 297
 298 int (*r600_blit_uncompress_depth_ptr)(struct pipe_context *ctx, struct r600_resource_texture *texture);
 299
 300 int r600_texture_depth_flush(struct pipe_context *ctx,
 301                              struct pipe_resource *texture)
 302 {
 303         struct r600_resource_texture *rtex = (struct r600_resource_texture*)texture;
 304         struct pipe_resource resource;
 305
 306         if (rtex->flushed_depth_texture)
 307                 goto out;
 308
 309         resource.target = PIPE_TEXTURE_2D;
 310         resource.format = texture->format;
 311         resource.width0 = texture->width0;
 312         resource.height0 = texture->height0;
 313         resource.depth0 = 1;
 314         resource.last_level = 0;
 315         resource.nr_samples = 0;
 316         resource.usage = PIPE_USAGE_DYNAMIC;
 317         resource.bind = 0;
 318         resource.flags = 0;
 319
 320         resource.bind |= PIPE_BIND_RENDER_TARGET;
 321
 322         rtex->flushed_depth_texture = (struct r600_resource_texture *)ctx->screen->resource_create(ctx->screen, &resource);
 323         if (rtex->flushed_depth_texture == NULL) {
 324                 R600_ERR("failed to create temporary texture to hold untiled copy\n");
 325                 return -ENOMEM;
 326         }
 327
 328 out:
 329         r600_blit_uncompress_depth_ptr(ctx, rtex);
 330         return 0;
 331 }
 332
 333 struct pipe_transfer* r600_texture_get_transfer(struct pipe_context *ctx,
 334                                                 struct pipe_resource *texture,
 335                                                 struct pipe_subresource sr,
 336                                                 unsigned usage,
 337                                                 const struct pipe_box *box)
 338 {
 339         struct r600_resource_texture *rtex = (struct r600_resource_texture*)texture;
 340         struct pipe_resource resource;
 341         struct r600_transfer *trans;
 342         int r;
 343
 344         trans = CALLOC_STRUCT(r600_transfer);
 345         if (trans == NULL)
 346                 return NULL;
 347         pipe_resource_reference(&trans->transfer.resource, texture);
 348         trans->transfer.sr = sr;
 349         trans->transfer.usage = usage;
 350         trans->transfer.box = *box;
 351         trans->transfer.stride = rtex->pitch_in_bytes[sr.level];
 352         trans->offset = r600_texture_get_offset(rtex, sr.level, box->z, sr.face);
 353         if (rtex->depth) {
 354                 r = r600_texture_depth_flush(ctx, texture);
 355                 if (r < 0) {
 356                         R600_ERR("failed to create temporary texture to hold untiled copy\n");
 357                         pipe_resource_reference(&trans->transfer.resource, NULL);
 358                         FREE(trans);
 359                         return NULL;
 360                 }
 361         } else if (rtex->tiled) {
 362                 resource.target = PIPE_TEXTURE_2D;
 363                 resource.format = texture->format;
 364                 resource.width0 = box->width;
 365                 resource.height0 = box->height;
 366                 resource.depth0 = 1;
 367                 resource.last_level = 0;
 368                 resource.nr_samples = 0;
 369                 resource.usage = PIPE_USAGE_DYNAMIC;
 370                 resource.bind = 0;
 371                 resource.flags = 0;
 372                 /* For texture reading, the temporary (detiled) texture is used as
 373                  * a render target when blitting from a tiled texture. */
 374                 if (usage & PIPE_TRANSFER_READ) {
 375                         resource.bind |= PIPE_BIND_RENDER_TARGET;
 376                 }
 377                 /* For texture writing, the temporary texture is used as a sampler
 378                  * when blitting into a tiled texture. */
 379                 if (usage & PIPE_TRANSFER_WRITE) {
 380                         resource.bind |= PIPE_BIND_SAMPLER_VIEW;
 381                 }
 382                 /* Create the temporary texture. */
 383                 trans->linear_texture = ctx->screen->resource_create(ctx->screen, &resource);
 384                 if (trans->linear_texture == NULL) {
 385                         R600_ERR("failed to create temporary texture to hold untiled copy\n");
 386                         pipe_resource_reference(&trans->transfer.resource, NULL);
 387                         FREE(trans);
 388                         return NULL;
 389                 }
 390
 391                 trans->transfer.stride =
 392                   ((struct r600_resource_texture *)trans->linear_texture)->pitch_in_bytes[0];
 393                 if (usage & PIPE_TRANSFER_READ) {
 394                         /* We cannot map a tiled texture directly because the data is
 395                          * in a different order, therefore we do detiling using a blit. */
 396                         r600_copy_from_tiled_texture(ctx, trans);
 397                         /* Always referenced in the blit. */
 398                         ctx->flush(ctx, 0, NULL);
 399                 }
 400         }
 401         return &trans->transfer;
 402 }
 403
 404 void r600_texture_transfer_destroy(struct pipe_context *ctx,
 405                                    struct pipe_transfer *transfer)
 406 {
 407         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 408         struct r600_resource_texture *rtex = (struct r600_resource_texture*)transfer->resource;
 409
 410         if (rtransfer->linear_texture) {
 411                 if (transfer->usage & PIPE_TRANSFER_WRITE) {
 412                         r600_copy_into_tiled_texture(ctx, rtransfer);
 413                 }
 414                 pipe_resource_reference(&rtransfer->linear_texture, NULL);
 415         }
 416         if (rtex->flushed_depth_texture) {
 417                 pipe_resource_reference((struct pipe_resource **)&rtex->flushed_depth_texture, NULL);
 418         }
 419         pipe_resource_reference(&transfer->resource, NULL);
 420         FREE(transfer);
 421 }
 422
 423 void* r600_texture_transfer_map(struct pipe_context *ctx,
 424                                 struct pipe_transfer* transfer)
 425 {
 426         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 427         struct r600_bo *bo;
 428         enum pipe_format format = transfer->resource->format;
 429         struct radeon *radeon = (struct radeon *)ctx->screen->winsys;
 430         unsigned long offset = 0;
 431         char *map;
 432
 433         if (rtransfer->linear_texture) {
 434                 bo = ((struct r600_resource *)rtransfer->linear_texture)->bo;
 435         } else {
 436                 struct r600_resource_texture *rtex = (struct r600_resource_texture*)transfer->resource;
 437
 438                 if (rtex->flushed_depth_texture)
 439                         bo = ((struct r600_resource *)rtex->flushed_depth_texture)->bo;
 440                 else
 441                         bo = ((struct r600_resource *)transfer->resource)->bo;
 442
 443                 offset = rtransfer->offset +
 444                         transfer->box.y / util_format_get_blockheight(format) * transfer->stride +
 445                         transfer->box.x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 446         }
 447         map = r600_bo_map(radeon, bo, 0, ctx);
 448         if (!map) {
 449                 return NULL;
 450         }
 451
 452         return map + offset;
 453 }
 454
 455 void r600_texture_transfer_unmap(struct pipe_context *ctx,
 456                                  struct pipe_transfer* transfer)
 457 {
 458         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 459         struct radeon *radeon = (struct radeon *)ctx->screen->winsys;
 460         struct r600_bo *bo;
 461
 462         if (rtransfer->linear_texture) {
 463                 bo = ((struct r600_resource *)rtransfer->linear_texture)->bo;
 464         } else {
 465                 struct r600_resource_texture *rtex = (struct r600_resource_texture*)transfer->resource;
 466
 467                 if (rtex->flushed_depth_texture) {
 468                         bo = ((struct r600_resource *)rtex->flushed_depth_texture)->bo;
 469                 } else {
 470                         bo = ((struct r600_resource *)transfer->resource)->bo;
 471                 }
 472         }
 473         r600_bo_unmap(radeon, bo);
 474 }
 475
 476 struct u_resource_vtbl r600_texture_vtbl =
 477 {
 478         u_default_resource_get_handle,  /* get_handle */
 479         r600_texture_destroy,           /* resource_destroy */
 480         r600_texture_is_referenced,     /* is_resource_referenced */
 481         r600_texture_get_transfer,      /* get_transfer */
 482         r600_texture_transfer_destroy,  /* transfer_destroy */
 483         r600_texture_transfer_map,      /* transfer_map */
 484         u_default_transfer_flush_region,/* transfer_flush_region */
 485         r600_texture_transfer_unmap,    /* transfer_unmap */
 486         u_default_transfer_inline_write /* transfer_inline_write */
 487 };
 488
 489 void r600_init_screen_texture_functions(struct pipe_screen *screen)
 490 {
 491         screen->get_tex_surface = r600_get_tex_surface;
 492         screen->tex_surface_destroy = r600_tex_surface_destroy;
 493 }
 494
 495 static unsigned r600_get_swizzle_combined(const unsigned char *swizzle_format,
 496                 const unsigned char *swizzle_view)
 497 {
 498         unsigned i;
 499         unsigned char swizzle[4];
 500         unsigned result = 0;
 501         const uint32_t swizzle_shift[4] = {
 502                 16, 19, 22, 25,
 503         };
 504         const uint32_t swizzle_bit[4] = {
 505                 0, 1, 2, 3,
 506         };
 507
 508         if (swizzle_view) {
 509                 /* Combine two sets of swizzles. */
 510                 for (i = 0; i < 4; i++) {
 511                         swizzle[i] = swizzle_view[i] <= UTIL_FORMAT_SWIZZLE_W ?
 512                                 swizzle_format[swizzle_view[i]] : swizzle_view[i];
 513                 }
 514         } else {
 515                 memcpy(swizzle, swizzle_format, 4);
 516         }
 517
 518         /* Get swizzle. */
 519         for (i = 0; i < 4; i++) {
 520                 switch (swizzle[i]) {
 521                 case UTIL_FORMAT_SWIZZLE_Y:
 522                         result |= swizzle_bit[1] << swizzle_shift[i];
 523                         break;
 524                 case UTIL_FORMAT_SWIZZLE_Z:
 525                         result |= swizzle_bit[2] << swizzle_shift[i];
 526                         break;
 527                 case UTIL_FORMAT_SWIZZLE_W:
 528                         result |= swizzle_bit[3] << swizzle_shift[i];
 529                         break;
 530                 case UTIL_FORMAT_SWIZZLE_0:
 531                         result |= V_038010_SQ_SEL_0 << swizzle_shift[i];
 532                         break;
 533                 case UTIL_FORMAT_SWIZZLE_1:
 534                         result |= V_038010_SQ_SEL_1 << swizzle_shift[i];
 535                         break;
 536                 default: /* UTIL_FORMAT_SWIZZLE_X */
 537                         result |= swizzle_bit[0] << swizzle_shift[i];
 538                 }
 539         }
 540         return result;
 541 }
 542
 543 /* texture format translate */
 544 uint32_t r600_translate_texformat(enum pipe_format format,
 545                                   const unsigned char *swizzle_view,
 546                                   uint32_t *word4_p, uint32_t *yuv_format_p)
 547 {
 548         uint32_t result = 0, word4 = 0, yuv_format = 0;
 549         const struct util_format_description *desc;
 550         boolean uniform = TRUE;
 551         int i;
 552         const uint32_t sign_bit[4] = {
 553                 S_038010_FORMAT_COMP_X(V_038010_SQ_FORMAT_COMP_SIGNED),
 554                 S_038010_FORMAT_COMP_Y(V_038010_SQ_FORMAT_COMP_SIGNED),
 555                 S_038010_FORMAT_COMP_Z(V_038010_SQ_FORMAT_COMP_SIGNED),
 556                 S_038010_FORMAT_COMP_W(V_038010_SQ_FORMAT_COMP_SIGNED)
 557         };
 558         desc = util_format_description(format);
 559
 560         word4 |= r600_get_swizzle_combined(desc->swizzle, swizzle_view);
 561
 562         /* Colorspace (return non-RGB formats directly). */
 563         switch (desc->colorspace) {
 564                 /* Depth stencil formats */
 565         case UTIL_FORMAT_COLORSPACE_ZS:
 566                 switch (format) {
 567                 case PIPE_FORMAT_Z16_UNORM:
 568                         result = V_0280A0_COLOR_16;
 569                         goto out_word4;
 570                 case PIPE_FORMAT_X24S8_USCALED:
 571                         word4 |= S_038010_NUM_FORMAT_ALL(V_038010_SQ_NUM_FORMAT_INT);
 572                 case PIPE_FORMAT_Z24X8_UNORM:
 573                 case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
 574                         result = V_0280A0_COLOR_8_24;
 575                         goto out_word4;
 576                 case PIPE_FORMAT_S8X24_USCALED:
 577                         word4 |= S_038010_NUM_FORMAT_ALL(V_038010_SQ_NUM_FORMAT_INT);
 578                 case PIPE_FORMAT_X8Z24_UNORM:
 579                 case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
 580                         result = V_0280A0_COLOR_24_8;
 581                         goto out_word4;
 582                 case PIPE_FORMAT_S8_USCALED:
 583                         result = V_0280A0_COLOR_8;
 584                         word4 |= S_038010_NUM_FORMAT_ALL(V_038010_SQ_NUM_FORMAT_INT);
 585                         goto out_word4;
 586                 default:
 587                         goto out_unknown;
 588                 }
 589
 590         case UTIL_FORMAT_COLORSPACE_YUV:
 591                 yuv_format |= (1 << 30);
 592                 switch (format) {
 593                 case PIPE_FORMAT_UYVY:
 594                 case PIPE_FORMAT_YUYV:
 595                 default:
 596                         break;
 597                 }
 598                 goto out_unknown; /* TODO */
 599
 600         case UTIL_FORMAT_COLORSPACE_SRGB:
 601                 word4 |= S_038010_FORCE_DEGAMMA(1);
 602                 if (format == PIPE_FORMAT_L8A8_SRGB || format == PIPE_FORMAT_L8_SRGB)
 603                         goto out_unknown; /* fails for some reason - TODO */
 604                 break;
 605
 606         default:
 607                 break;
 608         }
 609
 610         /* S3TC formats. TODO */
 611         if (desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 612                 goto out_unknown;
 613         }
 614
 615
 616         for (i = 0; i < desc->nr_channels; i++) {
 617                 if (desc->channel[i].type == UTIL_FORMAT_TYPE_SIGNED) {
 618                         word4 |= sign_bit[i];
 619                 }
 620         }
 621
 622         /* R8G8Bx_SNORM - TODO CxV8U8 */
 623
 624         /* RGTC - TODO */
 625
 626         /* See whether the components are of the same size. */
 627         for (i = 1; i < desc->nr_channels; i++) {
 628                 uniform = uniform && desc->channel[0].size == desc->channel[i].size;
 629         }
 630
 631         /* Non-uniform formats. */
 632         if (!uniform) {
 633                 switch(desc->nr_channels) {
 634                 case 3:
 635                         if (desc->channel[0].size == 5 &&
 636                             desc->channel[1].size == 6 &&
 637                             desc->channel[2].size == 5) {
 638                                 result = V_0280A0_COLOR_5_6_5;
 639                                 goto out_word4;
 640                         }
 641                         goto out_unknown;
 642                 case 4:
 643                         if (desc->channel[0].size == 5 &&
 644                             desc->channel[1].size == 5 &&
 645                             desc->channel[2].size == 5 &&
 646                             desc->channel[3].size == 1) {
 647                                 result = V_0280A0_COLOR_1_5_5_5;
 648                                 goto out_word4;
 649                         }
 650                         if (desc->channel[0].size == 10 &&
 651                             desc->channel[1].size == 10 &&
 652                             desc->channel[2].size == 10 &&
 653                             desc->channel[3].size == 2) {
 654                                 result = V_0280A0_COLOR_10_10_10_2;
 655                                 goto out_word4;
 656                         }
 657                         goto out_unknown;
 658                 }
 659                 goto out_unknown;
 660         }
 661
 662         /* Find the first non-VOID channel. */
 663         for (i = 0; i < 4; i++) {
 664                 if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 665                         break;
 666                 }
 667         }
 668
 669         if (i == 4)
 670                 goto out_unknown;
 671
 672         /* uniform formats */
 673         switch (desc->channel[i].type) {
 674         case UTIL_FORMAT_TYPE_UNSIGNED:
 675         case UTIL_FORMAT_TYPE_SIGNED:
 676                 if (!desc->channel[i].normalized &&
 677                     desc->colorspace != UTIL_FORMAT_COLORSPACE_SRGB) {
 678                         goto out_unknown;
 679                 }
 680
 681                 switch (desc->channel[i].size) {
 682                 case 4:
 683                         switch (desc->nr_channels) {
 684                         case 2:
 685                                 result = V_0280A0_COLOR_4_4;
 686                                 goto out_word4;
 687                         case 4:
 688                                 result = V_0280A0_COLOR_4_4_4_4;
 689                                 goto out_word4;
 690                         }
 691                         goto out_unknown;
 692                 case 8:
 693                         switch (desc->nr_channels) {
 694                         case 1:
 695                                 result = V_0280A0_COLOR_8;
 696                                 goto out_word4;
 697                         case 2:
 698                                 result = V_0280A0_COLOR_8_8;
 699                                 goto out_word4;
 700                         case 4:
 701                                 result = V_0280A0_COLOR_8_8_8_8;
 702                                 goto out_word4;
 703                         }
 704                         goto out_unknown;
 705                 case 16:
 706                         switch (desc->nr_channels) {
 707                         case 1:
 708                                 result = V_0280A0_COLOR_16;
 709                                 goto out_word4;
 710                         case 2:
 711                                 result = V_0280A0_COLOR_16_16;
 712                                 goto out_word4;
 713                         case 4:
 714                                 result = V_0280A0_COLOR_16_16_16_16;
 715                                 goto out_word4;
 716                         }
 717                 }
 718                 goto out_unknown;
 719
 720         case UTIL_FORMAT_TYPE_FLOAT:
 721                 switch (desc->channel[i].size) {
 722                 case 16:
 723                         switch (desc->nr_channels) {
 724                         case 1:
 725                                 result = V_0280A0_COLOR_16_FLOAT;
 726                                 goto out_word4;
 727                         case 2:
 728                                 result = V_0280A0_COLOR_16_16_FLOAT;
 729                                 goto out_word4;
 730                         case 4:
 731                                 result = V_0280A0_COLOR_16_16_16_16_FLOAT;
 732                                 goto out_word4;
 733                         }
 734                         goto out_unknown;
 735                 case 32:
 736                         switch (desc->nr_channels) {
 737                         case 1:
 738                                 result = V_0280A0_COLOR_32_FLOAT;
 739                                 goto out_word4;
 740                         case 2:
 741                                 result = V_0280A0_COLOR_32_32_FLOAT;
 742                                 goto out_word4;
 743                         case 4:
 744                                 result = V_0280A0_COLOR_32_32_32_32_FLOAT;
 745                                 goto out_word4;
 746                         }
 747                 }
 748
 749         }
 750 out_word4:
 751         if (word4_p)
 752                 *word4_p = word4;
 753         if (yuv_format_p)
 754                 *yuv_format_p = yuv_format;
 755         return result;
 756 out_unknown:
 757 //      R600_ERR("Unable to handle texformat %d %s\n", format, util_format_name(format));
 758         return ~0;
 759 }