src/gallium/drivers/vc4/vc4_state.c

   1 /*
   2  * Copyright © 2014 Broadcom
   3  * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  22  * IN THE SOFTWARE.
  23  */
  24
  25 #include "pipe/p_state.h"
  26 #include "util/u_inlines.h"
  27 #include "util/u_math.h"
  28 #include "util/u_memory.h"
  29 #include "util/u_helpers.h"
  30
  31 #include "vc4_context.h"
  32
  33 static void *
  34 vc4_generic_cso_state_create(const void *src, uint32_t size)
  35 {
  36         void *dst = calloc(1, size);
  37         if (!dst)
  38                 return NULL;
  39         memcpy(dst, src, size);
  40         return dst;
  41 }
  42
  43 static void
  44 vc4_generic_cso_state_delete(struct pipe_context *pctx, void *hwcso)
  45 {
  46         free(hwcso);
  47 }
  48
  49 static void
  50 vc4_set_blend_color(struct pipe_context *pctx,
  51                     const struct pipe_blend_color *blend_color)
  52 {
  53         struct vc4_context *vc4 = vc4_context(pctx);
  54         vc4->blend_color.f = *blend_color;
  55         for (int i = 0; i < 4; i++)
  56                 vc4->blend_color.ub[i] = float_to_ubyte(blend_color->color[i]);
  57         vc4->dirty |= VC4_DIRTY_BLEND_COLOR;
  58 }
  59
  60 static void
  61 vc4_set_stencil_ref(struct pipe_context *pctx,
  62                     const struct pipe_stencil_ref *stencil_ref)
  63 {
  64         struct vc4_context *vc4 = vc4_context(pctx);
  65         vc4->stencil_ref =* stencil_ref;
  66         vc4->dirty |= VC4_DIRTY_STENCIL_REF;
  67 }
  68
  69 static void
  70 vc4_set_clip_state(struct pipe_context *pctx,
  71                    const struct pipe_clip_state *clip)
  72 {
  73         struct vc4_context *vc4 = vc4_context(pctx);
  74         vc4->clip = *clip;
  75         vc4->dirty |= VC4_DIRTY_CLIP;
  76 }
  77
  78 static void
  79 vc4_set_sample_mask(struct pipe_context *pctx, unsigned sample_mask)
  80 {
  81         struct vc4_context *vc4 = vc4_context(pctx);
  82         vc4->sample_mask = sample_mask & ((1 << VC4_MAX_SAMPLES) - 1);
  83         vc4->dirty |= VC4_DIRTY_SAMPLE_MASK;
  84 }
  85
  86 static uint16_t
  87 float_to_187_half(float f)
  88 {
  89         return fui(f) >> 16;
  90 }
  91
  92 static void *
  93 vc4_create_rasterizer_state(struct pipe_context *pctx,
  94                             const struct pipe_rasterizer_state *cso)
  95 {
  96         struct vc4_rasterizer_state *so;
  97         struct V3D21_DEPTH_OFFSET depth_offset = { V3D21_DEPTH_OFFSET_header };
  98         struct V3D21_POINT_SIZE point_size = { V3D21_POINT_SIZE_header };
  99         struct V3D21_LINE_WIDTH line_width = { V3D21_LINE_WIDTH_header };
 100
 101         so = CALLOC_STRUCT(vc4_rasterizer_state);
 102         if (!so)
 103                 return NULL;
 104
 105         so->base = *cso;
 106
 107         if (!(cso->cull_face & PIPE_FACE_FRONT))
 108                 so->config_bits[0] |= VC4_CONFIG_BITS_ENABLE_PRIM_FRONT;
 109         if (!(cso->cull_face & PIPE_FACE_BACK))
 110                 so->config_bits[0] |= VC4_CONFIG_BITS_ENABLE_PRIM_BACK;
 111
 112         /* Workaround: HW-2726 PTB does not handle zero-size points (BCM2835,
 113          * BCM21553).
 114          */
 115         point_size.point_size = MAX2(cso->point_size, .125f);
 116
 117         line_width.line_width = cso->line_width;
 118
 119         if (cso->front_ccw)
 120                 so->config_bits[0] |= VC4_CONFIG_BITS_CW_PRIMITIVES;
 121
 122         if (cso->offset_tri) {
 123                 so->config_bits[0] |= VC4_CONFIG_BITS_ENABLE_DEPTH_OFFSET;
 124
 125                 depth_offset.depth_offset_units =
 126                         float_to_187_half(cso->offset_units);
 127                 depth_offset.depth_offset_factor =
 128                         float_to_187_half(cso->offset_scale);
 129         }
 130
 131         if (cso->multisample)
 132                 so->config_bits[0] |= VC4_CONFIG_BITS_RASTERIZER_OVERSAMPLE_4X;
 133
 134         V3D21_DEPTH_OFFSET_pack(NULL, so->packed.depth_offset, &depth_offset);
 135         V3D21_POINT_SIZE_pack(NULL, so->packed.point_size, &point_size);
 136         V3D21_LINE_WIDTH_pack(NULL, so->packed.line_width, &line_width);
 137
 138         if (cso->tile_raster_order_fixed) {
 139                 so->tile_raster_order_flags |= VC4_SUBMIT_CL_FIXED_RCL_ORDER;
 140                 if (cso->tile_raster_order_increasing_x) {
 141                         so->tile_raster_order_flags |=
 142                                 VC4_SUBMIT_CL_RCL_ORDER_INCREASING_X;
 143                 }
 144                 if (cso->tile_raster_order_increasing_y) {
 145                         so->tile_raster_order_flags |=
 146                                 VC4_SUBMIT_CL_RCL_ORDER_INCREASING_Y;
 147                 }
 148         }
 149
 150         return so;
 151 }
 152
 153 /* Blend state is baked into shaders. */
 154 static void *
 155 vc4_create_blend_state(struct pipe_context *pctx,
 156                        const struct pipe_blend_state *cso)
 157 {
 158         return vc4_generic_cso_state_create(cso, sizeof(*cso));
 159 }
 160
 161 /**
 162  * The TLB_STENCIL_SETUP data has a little bitfield for common writemask
 163  * values, so you don't have to do a separate writemask setup.
 164  */
 165 static uint8_t
 166 tlb_stencil_setup_writemask(uint8_t mask)
 167 {
 168         switch (mask) {
 169         case 0x1: return 0;
 170         case 0x3: return 1;
 171         case 0xf: return 2;
 172         case 0xff: return 3;
 173         default: return 0xff;
 174         }
 175 }
 176
 177 static uint32_t
 178 tlb_stencil_setup_bits(const struct pipe_stencil_state *state,
 179                        uint8_t writemask_bits)
 180 {
 181         static const uint8_t op_map[] = {
 182                 [PIPE_STENCIL_OP_ZERO] = 0,
 183                 [PIPE_STENCIL_OP_KEEP] = 1,
 184                 [PIPE_STENCIL_OP_REPLACE] = 2,
 185                 [PIPE_STENCIL_OP_INCR] = 3,
 186                 [PIPE_STENCIL_OP_DECR] = 4,
 187                 [PIPE_STENCIL_OP_INVERT] = 5,
 188                 [PIPE_STENCIL_OP_INCR_WRAP] = 6,
 189                 [PIPE_STENCIL_OP_DECR_WRAP] = 7,
 190         };
 191         uint32_t bits = 0;
 192
 193         if (writemask_bits != 0xff)
 194                 bits |= writemask_bits << 28;
 195         bits |= op_map[state->zfail_op] << 25;
 196         bits |= op_map[state->zpass_op] << 22;
 197         bits |= op_map[state->fail_op] << 19;
 198         bits |= state->func << 16;
 199         /* Ref is filled in at uniform upload time */
 200         bits |= state->valuemask << 0;
 201
 202         return bits;
 203 }
 204
 205 static void *
 206 vc4_create_depth_stencil_alpha_state(struct pipe_context *pctx,
 207                                      const struct pipe_depth_stencil_alpha_state *cso)
 208 {
 209         struct vc4_depth_stencil_alpha_state *so;
 210
 211         so = CALLOC_STRUCT(vc4_depth_stencil_alpha_state);
 212         if (!so)
 213                 return NULL;
 214
 215         so->base = *cso;
 216
 217         /* We always keep the early Z state correct, since a later state using
 218          * early Z may want it.
 219          */
 220         so->config_bits[2] |= VC4_CONFIG_BITS_EARLY_Z_UPDATE;
 221
 222         if (cso->depth.enabled) {
 223                 if (cso->depth.writemask) {
 224                         so->config_bits[1] |= VC4_CONFIG_BITS_Z_UPDATE;
 225                 }
 226                 so->config_bits[1] |= (cso->depth.func <<
 227                                        VC4_CONFIG_BITS_DEPTH_FUNC_SHIFT);
 228
 229                 /* We only handle early Z in the < direction because otherwise
 230                  * we'd have to runtime guess which direction to set in the
 231                  * render config.
 232                  */
 233                 if ((cso->depth.func == PIPE_FUNC_LESS ||
 234                      cso->depth.func == PIPE_FUNC_LEQUAL) &&
 235                     (!cso->stencil[0].enabled ||
 236                      (cso->stencil[0].zfail_op == PIPE_STENCIL_OP_KEEP &&
 237                       (!cso->stencil[1].enabled ||
 238                        cso->stencil[1].zfail_op == PIPE_STENCIL_OP_KEEP)))) {
 239                         so->config_bits[2] |= VC4_CONFIG_BITS_EARLY_Z;
 240                 }
 241         } else {
 242                 so->config_bits[1] |= (PIPE_FUNC_ALWAYS <<
 243                                        VC4_CONFIG_BITS_DEPTH_FUNC_SHIFT);
 244         }
 245
 246         if (cso->stencil[0].enabled) {
 247                 const struct pipe_stencil_state *front = &cso->stencil[0];
 248                 const struct pipe_stencil_state *back = &cso->stencil[1];
 249
 250                 uint8_t front_writemask_bits =
 251                         tlb_stencil_setup_writemask(front->writemask);
 252                 uint8_t back_writemask = front->writemask;
 253                 uint8_t back_writemask_bits = front_writemask_bits;
 254
 255                 so->stencil_uniforms[0] =
 256                         tlb_stencil_setup_bits(front, front_writemask_bits);
 257                 if (back->enabled) {
 258                         back_writemask = back->writemask;
 259                         back_writemask_bits =
 260                                 tlb_stencil_setup_writemask(back->writemask);
 261
 262                         so->stencil_uniforms[0] |= (1 << 30);
 263                         so->stencil_uniforms[1] =
 264                                 tlb_stencil_setup_bits(back, back_writemask_bits);
 265                         so->stencil_uniforms[1] |= (2 << 30);
 266                 } else {
 267                         so->stencil_uniforms[0] |= (3 << 30);
 268                 }
 269
 270                 if (front_writemask_bits == 0xff ||
 271                     back_writemask_bits == 0xff) {
 272                         so->stencil_uniforms[2] = (front->writemask |
 273                                                    (back_writemask << 8));
 274                 }
 275         }
 276
 277         return so;
 278 }
 279
 280 static void
 281 vc4_set_polygon_stipple(struct pipe_context *pctx,
 282                         const struct pipe_poly_stipple *stipple)
 283 {
 284         struct vc4_context *vc4 = vc4_context(pctx);
 285         vc4->stipple = *stipple;
 286         vc4->dirty |= VC4_DIRTY_STIPPLE;
 287 }
 288
 289 static void
 290 vc4_set_scissor_states(struct pipe_context *pctx,
 291                        unsigned start_slot,
 292                        unsigned num_scissors,
 293                        const struct pipe_scissor_state *scissor)
 294 {
 295         struct vc4_context *vc4 = vc4_context(pctx);
 296
 297         vc4->scissor = *scissor;
 298         vc4->dirty |= VC4_DIRTY_SCISSOR;
 299 }
 300
 301 static void
 302 vc4_set_viewport_states(struct pipe_context *pctx,
 303                         unsigned start_slot,
 304                         unsigned num_viewports,
 305                         const struct pipe_viewport_state *viewport)
 306 {
 307         struct vc4_context *vc4 = vc4_context(pctx);
 308         vc4->viewport = *viewport;
 309         vc4->dirty |= VC4_DIRTY_VIEWPORT;
 310 }
 311
 312 static void
 313 vc4_set_vertex_buffers(struct pipe_context *pctx,
 314                        unsigned start_slot, unsigned count,
 315                        const struct pipe_vertex_buffer *vb)
 316 {
 317         struct vc4_context *vc4 = vc4_context(pctx);
 318         struct vc4_vertexbuf_stateobj *so = &vc4->vertexbuf;
 319
 320         util_set_vertex_buffers_mask(so->vb, &so->enabled_mask, vb,
 321                                      start_slot, count);
 322         so->count = util_last_bit(so->enabled_mask);
 323
 324         vc4->dirty |= VC4_DIRTY_VTXBUF;
 325 }
 326
 327 static void
 328 vc4_blend_state_bind(struct pipe_context *pctx, void *hwcso)
 329 {
 330         struct vc4_context *vc4 = vc4_context(pctx);
 331         vc4->blend = hwcso;
 332         vc4->dirty |= VC4_DIRTY_BLEND;
 333 }
 334
 335 static void
 336 vc4_rasterizer_state_bind(struct pipe_context *pctx, void *hwcso)
 337 {
 338         struct vc4_context *vc4 = vc4_context(pctx);
 339         struct vc4_rasterizer_state *rast = hwcso;
 340
 341         if (vc4->rasterizer && rast &&
 342             vc4->rasterizer->base.flatshade != rast->base.flatshade) {
 343                 vc4->dirty |= VC4_DIRTY_FLAT_SHADE_FLAGS;
 344         }
 345
 346         vc4->rasterizer = hwcso;
 347         vc4->dirty |= VC4_DIRTY_RASTERIZER;
 348 }
 349
 350 static void
 351 vc4_zsa_state_bind(struct pipe_context *pctx, void *hwcso)
 352 {
 353         struct vc4_context *vc4 = vc4_context(pctx);
 354         vc4->zsa = hwcso;
 355         vc4->dirty |= VC4_DIRTY_ZSA;
 356 }
 357
 358 static void *
 359 vc4_vertex_state_create(struct pipe_context *pctx, unsigned num_elements,
 360                         const struct pipe_vertex_element *elements)
 361 {
 362         struct vc4_vertex_stateobj *so = CALLOC_STRUCT(vc4_vertex_stateobj);
 363
 364         if (!so)
 365                 return NULL;
 366
 367         memcpy(so->pipe, elements, sizeof(*elements) * num_elements);
 368         so->num_elements = num_elements;
 369
 370         return so;
 371 }
 372
 373 static void
 374 vc4_vertex_state_bind(struct pipe_context *pctx, void *hwcso)
 375 {
 376         struct vc4_context *vc4 = vc4_context(pctx);
 377         vc4->vtx = hwcso;
 378         vc4->dirty |= VC4_DIRTY_VTXSTATE;
 379 }
 380
 381 static void
 382 vc4_set_constant_buffer(struct pipe_context *pctx,
 383                         enum pipe_shader_type shader, uint index,
 384                         const struct pipe_constant_buffer *cb)
 385 {
 386         struct vc4_context *vc4 = vc4_context(pctx);
 387         struct vc4_constbuf_stateobj *so = &vc4->constbuf[shader];
 388
 389         assert(index == 0);
 390
 391         /* Note that the state tracker can unbind constant buffers by
 392          * passing NULL here.
 393          */
 394         if (unlikely(!cb)) {
 395                 so->enabled_mask &= ~(1 << index);
 396                 so->dirty_mask &= ~(1 << index);
 397                 return;
 398         }
 399
 400         assert(!cb->buffer);
 401         so->cb[index].buffer_offset = cb->buffer_offset;
 402         so->cb[index].buffer_size   = cb->buffer_size;
 403         so->cb[index].user_buffer   = cb->user_buffer;
 404
 405         so->enabled_mask |= 1 << index;
 406         so->dirty_mask |= 1 << index;
 407         vc4->dirty |= VC4_DIRTY_CONSTBUF;
 408 }
 409
 410 static void
 411 vc4_set_framebuffer_state(struct pipe_context *pctx,
 412                           const struct pipe_framebuffer_state *framebuffer)
 413 {
 414         struct vc4_context *vc4 = vc4_context(pctx);
 415         struct pipe_framebuffer_state *cso = &vc4->framebuffer;
 416         unsigned i;
 417
 418         vc4->job = NULL;
 419
 420         for (i = 0; i < framebuffer->nr_cbufs; i++)
 421                 pipe_surface_reference(&cso->cbufs[i], framebuffer->cbufs[i]);
 422         for (; i < vc4->framebuffer.nr_cbufs; i++)
 423                 pipe_surface_reference(&cso->cbufs[i], NULL);
 424
 425         cso->nr_cbufs = framebuffer->nr_cbufs;
 426
 427         pipe_surface_reference(&cso->zsbuf, framebuffer->zsbuf);
 428
 429         cso->width = framebuffer->width;
 430         cso->height = framebuffer->height;
 431
 432         /* Nonzero texture mipmap levels are laid out as if they were in
 433          * power-of-two-sized spaces.  The renderbuffer config infers its
 434          * stride from the width parameter, so we need to configure our
 435          * framebuffer.  Note that if the z/color buffers were mismatched
 436          * sizes, we wouldn't be able to do this.
 437          */
 438         if (cso->cbufs[0] && cso->cbufs[0]->u.tex.level) {
 439                 struct vc4_resource *rsc =
 440                         vc4_resource(cso->cbufs[0]->texture);
 441                 cso->width =
 442                         (rsc->slices[cso->cbufs[0]->u.tex.level].stride /
 443                          rsc->cpp);
 444         } else if (cso->zsbuf && cso->zsbuf->u.tex.level){
 445                 struct vc4_resource *rsc =
 446                         vc4_resource(cso->zsbuf->texture);
 447                 cso->width =
 448                         (rsc->slices[cso->zsbuf->u.tex.level].stride /
 449                          rsc->cpp);
 450         }
 451
 452         vc4->dirty |= VC4_DIRTY_FRAMEBUFFER;
 453 }
 454
 455 static struct vc4_texture_stateobj *
 456 vc4_get_stage_tex(struct vc4_context *vc4, enum pipe_shader_type shader)
 457 {
 458         switch (shader) {
 459         case PIPE_SHADER_FRAGMENT:
 460                 vc4->dirty |= VC4_DIRTY_FRAGTEX;
 461                 return &vc4->fragtex;
 462                 break;
 463         case PIPE_SHADER_VERTEX:
 464                 vc4->dirty |= VC4_DIRTY_VERTTEX;
 465                 return &vc4->verttex;
 466                 break;
 467         default:
 468                 fprintf(stderr, "Unknown shader target %d\n", shader);
 469                 abort();
 470         }
 471 }
 472
 473 static uint32_t translate_wrap(uint32_t p_wrap, bool using_nearest)
 474 {
 475         switch (p_wrap) {
 476         case PIPE_TEX_WRAP_REPEAT:
 477                 return 0;
 478         case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
 479                 return 1;
 480         case PIPE_TEX_WRAP_MIRROR_REPEAT:
 481                 return 2;
 482         case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
 483                 return 3;
 484         case PIPE_TEX_WRAP_CLAMP:
 485                 return (using_nearest ? 1 : 3);
 486         default:
 487                 fprintf(stderr, "Unknown wrap mode %d\n", p_wrap);
 488                 assert(!"not reached");
 489                 return 0;
 490         }
 491 }
 492
 493 static void *
 494 vc4_create_sampler_state(struct pipe_context *pctx,
 495                          const struct pipe_sampler_state *cso)
 496 {
 497         static const uint8_t minfilter_map[6] = {
 498                 VC4_TEX_P1_MINFILT_NEAR_MIP_NEAR,
 499                 VC4_TEX_P1_MINFILT_LIN_MIP_NEAR,
 500                 VC4_TEX_P1_MINFILT_NEAR_MIP_LIN,
 501                 VC4_TEX_P1_MINFILT_LIN_MIP_LIN,
 502                 VC4_TEX_P1_MINFILT_NEAREST,
 503                 VC4_TEX_P1_MINFILT_LINEAR,
 504         };
 505         static const uint32_t magfilter_map[] = {
 506                 [PIPE_TEX_FILTER_NEAREST] = VC4_TEX_P1_MAGFILT_NEAREST,
 507                 [PIPE_TEX_FILTER_LINEAR] = VC4_TEX_P1_MAGFILT_LINEAR,
 508         };
 509         bool either_nearest =
 510                 (cso->mag_img_filter == PIPE_TEX_MIPFILTER_NEAREST ||
 511                  cso->min_img_filter == PIPE_TEX_MIPFILTER_NEAREST);
 512         struct vc4_sampler_state *so = CALLOC_STRUCT(vc4_sampler_state);
 513
 514         if (!so)
 515                 return NULL;
 516
 517         memcpy(so, cso, sizeof(*cso));
 518
 519         so->texture_p1 =
 520                 (VC4_SET_FIELD(magfilter_map[cso->mag_img_filter],
 521                                VC4_TEX_P1_MAGFILT) |
 522                  VC4_SET_FIELD(minfilter_map[cso->min_mip_filter * 2 +
 523                                              cso->min_img_filter],
 524                                VC4_TEX_P1_MINFILT) |
 525                  VC4_SET_FIELD(translate_wrap(cso->wrap_s, either_nearest),
 526                                VC4_TEX_P1_WRAP_S) |
 527                  VC4_SET_FIELD(translate_wrap(cso->wrap_t, either_nearest),
 528                                VC4_TEX_P1_WRAP_T));
 529
 530         return so;
 531 }
 532
 533 static void
 534 vc4_sampler_states_bind(struct pipe_context *pctx,
 535                         enum pipe_shader_type shader, unsigned start,
 536                         unsigned nr, void **hwcso)
 537 {
 538         struct vc4_context *vc4 = vc4_context(pctx);
 539         struct vc4_texture_stateobj *stage_tex = vc4_get_stage_tex(vc4, shader);
 540
 541         assert(start == 0);
 542         unsigned i;
 543         unsigned new_nr = 0;
 544
 545         for (i = 0; i < nr; i++) {
 546                 if (hwcso[i])
 547                         new_nr = i + 1;
 548                 stage_tex->samplers[i] = hwcso[i];
 549         }
 550
 551         for (; i < stage_tex->num_samplers; i++) {
 552                 stage_tex->samplers[i] = NULL;
 553         }
 554
 555         stage_tex->num_samplers = new_nr;
 556 }
 557
 558 static struct pipe_sampler_view *
 559 vc4_create_sampler_view(struct pipe_context *pctx, struct pipe_resource *prsc,
 560                         const struct pipe_sampler_view *cso)
 561 {
 562         struct vc4_sampler_view *so = CALLOC_STRUCT(vc4_sampler_view);
 563         struct vc4_resource *rsc = vc4_resource(prsc);
 564
 565         if (!so)
 566                 return NULL;
 567
 568         so->base = *cso;
 569
 570         so->base.texture = NULL;
 571         pipe_resource_reference(&so->base.texture, prsc);
 572         so->base.reference.count = 1;
 573         so->base.context = pctx;
 574
 575         /* There is no hardware level clamping, and the start address of a
 576          * texture may be misaligned, so in that case we have to copy to a
 577          * temporary.
 578          *
 579          * Also, Raspberry Pi doesn't support sampling from raster textures,
 580          * so we also have to copy to a temporary then.
 581          */
 582         if ((cso->u.tex.first_level &&
 583              (cso->u.tex.first_level != cso->u.tex.last_level)) ||
 584             rsc->vc4_format == VC4_TEXTURE_TYPE_RGBA32R) {
 585                 struct vc4_resource *shadow_parent = rsc;
 586                 struct pipe_resource tmpl = *prsc;
 587
 588                 tmpl.bind = PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET;
 589                 tmpl.width0 = u_minify(tmpl.width0, cso->u.tex.first_level);
 590                 tmpl.height0 = u_minify(tmpl.height0, cso->u.tex.first_level);
 591                 tmpl.last_level = cso->u.tex.last_level - cso->u.tex.first_level;
 592
 593                 /* Create the shadow texture.  The rest of the texture
 594                  * parameter setup will use the shadow.
 595                  */
 596                 prsc = vc4_resource_create(pctx->screen, &tmpl);
 597                 if (!prsc) {
 598                         free(so);
 599                         return NULL;
 600                 }
 601                 rsc = vc4_resource(prsc);
 602                 vc4_bo_label(vc4_screen(pctx->screen), rsc->bo,
 603                             "tiling shadow %dx%d",
 604                              tmpl.width0, tmpl.height0);
 605
 606                 /* Flag it as needing update of the contents from the parent. */
 607                 rsc->writes = shadow_parent->writes - 1;
 608                 assert(rsc->vc4_format != VC4_TEXTURE_TYPE_RGBA32R);
 609
 610                 so->texture = prsc;
 611         } else {
 612                 pipe_resource_reference(&so->texture, prsc);
 613
 614                 if (cso->u.tex.first_level) {
 615                         so->force_first_level = true;
 616                 }
 617         }
 618
 619         so->texture_p0 =
 620                 (VC4_SET_FIELD(rsc->slices[0].offset >> 12, VC4_TEX_P0_OFFSET) |
 621                  VC4_SET_FIELD(rsc->vc4_format & 15, VC4_TEX_P0_TYPE) |
 622                  VC4_SET_FIELD(so->force_first_level ?
 623                                cso->u.tex.last_level :
 624                                cso->u.tex.last_level -
 625                                cso->u.tex.first_level, VC4_TEX_P0_MIPLVLS) |
 626                  VC4_SET_FIELD(cso->target == PIPE_TEXTURE_CUBE,
 627                                VC4_TEX_P0_CMMODE));
 628         so->texture_p1 =
 629                 (VC4_SET_FIELD(rsc->vc4_format >> 4, VC4_TEX_P1_TYPE4) |
 630                  VC4_SET_FIELD(prsc->height0 & 2047, VC4_TEX_P1_HEIGHT) |
 631                  VC4_SET_FIELD(prsc->width0 & 2047, VC4_TEX_P1_WIDTH));
 632
 633         if (prsc->format == PIPE_FORMAT_ETC1_RGB8)
 634                 so->texture_p1 |= VC4_TEX_P1_ETCFLIP_MASK;
 635
 636         return &so->base;
 637 }
 638
 639 static void
 640 vc4_sampler_view_destroy(struct pipe_context *pctx,
 641                          struct pipe_sampler_view *pview)
 642 {
 643         struct vc4_sampler_view *view = vc4_sampler_view(pview);
 644         pipe_resource_reference(&pview->texture, NULL);
 645         pipe_resource_reference(&view->texture, NULL);
 646         free(view);
 647 }
 648
 649 static void
 650 vc4_set_sampler_views(struct pipe_context *pctx,
 651                       enum pipe_shader_type shader,
 652                       unsigned start, unsigned nr,
 653                       struct pipe_sampler_view **views)
 654 {
 655         struct vc4_context *vc4 = vc4_context(pctx);
 656         struct vc4_texture_stateobj *stage_tex = vc4_get_stage_tex(vc4, shader);
 657         unsigned i;
 658         unsigned new_nr = 0;
 659
 660         assert(start == 0);
 661
 662         for (i = 0; i < nr; i++) {
 663                 if (views[i])
 664                         new_nr = i + 1;
 665                 pipe_sampler_view_reference(&stage_tex->textures[i], views[i]);
 666         }
 667
 668         for (; i < stage_tex->num_textures; i++) {
 669                 pipe_sampler_view_reference(&stage_tex->textures[i], NULL);
 670         }
 671
 672         stage_tex->num_textures = new_nr;
 673 }
 674
 675 void
 676 vc4_state_init(struct pipe_context *pctx)
 677 {
 678         pctx->set_blend_color = vc4_set_blend_color;
 679         pctx->set_stencil_ref = vc4_set_stencil_ref;
 680         pctx->set_clip_state = vc4_set_clip_state;
 681         pctx->set_sample_mask = vc4_set_sample_mask;
 682         pctx->set_constant_buffer = vc4_set_constant_buffer;
 683         pctx->set_framebuffer_state = vc4_set_framebuffer_state;
 684         pctx->set_polygon_stipple = vc4_set_polygon_stipple;
 685         pctx->set_scissor_states = vc4_set_scissor_states;
 686         pctx->set_viewport_states = vc4_set_viewport_states;
 687
 688         pctx->set_vertex_buffers = vc4_set_vertex_buffers;
 689
 690         pctx->create_blend_state = vc4_create_blend_state;
 691         pctx->bind_blend_state = vc4_blend_state_bind;
 692         pctx->delete_blend_state = vc4_generic_cso_state_delete;
 693
 694         pctx->create_rasterizer_state = vc4_create_rasterizer_state;
 695         pctx->bind_rasterizer_state = vc4_rasterizer_state_bind;
 696         pctx->delete_rasterizer_state = vc4_generic_cso_state_delete;
 697
 698         pctx->create_depth_stencil_alpha_state = vc4_create_depth_stencil_alpha_state;
 699         pctx->bind_depth_stencil_alpha_state = vc4_zsa_state_bind;
 700         pctx->delete_depth_stencil_alpha_state = vc4_generic_cso_state_delete;
 701
 702         pctx->create_vertex_elements_state = vc4_vertex_state_create;
 703         pctx->delete_vertex_elements_state = vc4_generic_cso_state_delete;
 704         pctx->bind_vertex_elements_state = vc4_vertex_state_bind;
 705
 706         pctx->create_sampler_state = vc4_create_sampler_state;
 707         pctx->delete_sampler_state = vc4_generic_cso_state_delete;
 708         pctx->bind_sampler_states = vc4_sampler_states_bind;
 709
 710         pctx->create_sampler_view = vc4_create_sampler_view;
 711         pctx->sampler_view_destroy = vc4_sampler_view_destroy;
 712         pctx->set_sampler_views = vc4_set_sampler_views;
 713 }