src/gallium/drivers/etnaviv/etnaviv_clear_blit.c

   1 /*
   2  * Copyright (c) 2012-2015 Etnaviv Project
   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  * the rights to use, copy, modify, merge, publish, distribute, sub license,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the
  12  * next paragraph) shall be included in all copies or substantial portions
  13  * of the 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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Wladimir J. van der Laan <laanwj@gmail.com>
  25  */
  26
  27 #include "etnaviv_clear_blit.h"
  28
  29 #include "hw/common.xml.h"
  30
  31 #include "etnaviv_context.h"
  32 #include "etnaviv_emit.h"
  33 #include "etnaviv_emit.h"
  34 #include "etnaviv_format.h"
  35 #include "etnaviv_resource.h"
  36 #include "etnaviv_surface.h"
  37 #include "etnaviv_translate.h"
  38
  39 #include "pipe/p_defines.h"
  40 #include "pipe/p_state.h"
  41 #include "util/u_blitter.h"
  42 #include "util/u_inlines.h"
  43 #include "util/u_memory.h"
  44 #include "util/u_surface.h"
  45
  46 /* Save current state for blitter operation */
  47 static void
  48 etna_blit_save_state(struct etna_context *ctx)
  49 {
  50    util_blitter_save_vertex_buffer_slot(ctx->blitter, ctx->vertex_buffer.vb);
  51    util_blitter_save_vertex_elements(ctx->blitter, ctx->vertex_elements);
  52    util_blitter_save_vertex_shader(ctx->blitter, ctx->shader.bind_vs);
  53    util_blitter_save_rasterizer(ctx->blitter, ctx->rasterizer);
  54    util_blitter_save_viewport(ctx->blitter, &ctx->viewport_s);
  55    util_blitter_save_scissor(ctx->blitter, &ctx->scissor_s);
  56    util_blitter_save_fragment_shader(ctx->blitter, ctx->shader.bind_fs);
  57    util_blitter_save_blend(ctx->blitter, ctx->blend);
  58    util_blitter_save_depth_stencil_alpha(ctx->blitter, ctx->zsa);
  59    util_blitter_save_stencil_ref(ctx->blitter, &ctx->stencil_ref_s);
  60    util_blitter_save_sample_mask(ctx->blitter, ctx->sample_mask);
  61    util_blitter_save_framebuffer(ctx->blitter, &ctx->framebuffer_s);
  62    util_blitter_save_fragment_sampler_states(ctx->blitter,
  63          ctx->num_fragment_samplers, (void **)ctx->sampler);
  64    util_blitter_save_fragment_sampler_views(ctx->blitter,
  65          ctx->num_fragment_sampler_views, ctx->sampler_view);
  66 }
  67
  68 /* Generate clear command for a surface (non-fast clear case) */
  69 void
  70 etna_rs_gen_clear_surface(struct etna_context *ctx, struct etna_surface *surf,
  71                           uint32_t clear_value)
  72 {
  73    struct etna_resource *dst = etna_resource(surf->base.texture);
  74    uint32_t format = translate_rs_format(surf->base.format);
  75
  76    if (format == ETNA_NO_MATCH) {
  77       BUG("etna_rs_gen_clear_surface: Unhandled clear fmt %s", util_format_name(surf->base.format));
  78       format = RS_FORMAT_A8R8G8B8;
  79       assert(0);
  80    }
  81
  82    /* use tiled clear if width is multiple of 16 */
  83    bool tiled_clear = (surf->surf.padded_width & ETNA_RS_WIDTH_MASK) == 0 &&
  84                       (surf->surf.padded_height & ETNA_RS_HEIGHT_MASK) == 0;
  85
  86    etna_compile_rs_state( ctx, &surf->clear_command, &(struct rs_state) {
  87       .source_format = format,
  88       .dest_format = format,
  89       .dest = dst->bo,
  90       .dest_offset = surf->surf.offset,
  91       .dest_stride = surf->surf.stride,
  92       .dest_padded_height = surf->surf.padded_height,
  93       .dest_tiling = tiled_clear ? dst->layout : ETNA_LAYOUT_LINEAR,
  94       .dither = {0xffffffff, 0xffffffff},
  95       .width = surf->surf.padded_width, /* These must be padded to 16x4 if !LINEAR, otherwise RS will hang */
  96       .height = surf->surf.padded_height,
  97       .clear_value = {clear_value},
  98       .clear_mode = VIVS_RS_CLEAR_CONTROL_MODE_ENABLED1,
  99       .clear_bits = 0xffff
 100    });
 101 }
 102
 103 static inline uint32_t
 104 pack_rgba(enum pipe_format format, const float *rgba)
 105 {
 106    union util_color uc;
 107    util_pack_color(rgba, format, &uc);
 108    if (util_format_get_blocksize(format) == 2)
 109       return uc.ui[0] << 16 | uc.ui[0];
 110    else
 111       return uc.ui[0];
 112 }
 113
 114 static void
 115 etna_blit_clear_color(struct pipe_context *pctx, struct pipe_surface *dst,
 116                       const union pipe_color_union *color)
 117 {
 118    struct etna_context *ctx = etna_context(pctx);
 119    struct etna_surface *surf = etna_surface(dst);
 120    uint32_t new_clear_value = pack_rgba(surf->base.format, color->f);
 121
 122    if (surf->surf.ts_size) { /* TS: use precompiled clear command */
 123       ctx->framebuffer.TS_COLOR_CLEAR_VALUE = new_clear_value;
 124
 125       if (VIV_FEATURE(ctx->screen, chipMinorFeatures1, AUTO_DISABLE)) {
 126          /* Set number of color tiles to be filled */
 127          etna_set_state(ctx->stream, VIVS_TS_COLOR_AUTO_DISABLE_COUNT,
 128                         surf->surf.padded_width * surf->surf.padded_height / 16);
 129          ctx->framebuffer.TS_MEM_CONFIG |= VIVS_TS_MEM_CONFIG_COLOR_AUTO_DISABLE;
 130       }
 131
 132       surf->level->ts_valid = true;
 133       ctx->dirty |= ETNA_DIRTY_TS;
 134    } else if (unlikely(new_clear_value != surf->level->clear_value)) { /* Queue normal RS clear for non-TS surfaces */
 135       /* If clear color changed, re-generate stored command */
 136       etna_rs_gen_clear_surface(ctx, surf, new_clear_value);
 137    }
 138
 139    etna_submit_rs_state(ctx, &surf->clear_command);
 140    surf->level->clear_value = new_clear_value;
 141    resource_written(ctx, surf->base.texture);
 142    etna_resource(surf->base.texture)->seqno++;
 143 }
 144
 145 static void
 146 etna_blit_clear_zs(struct pipe_context *pctx, struct pipe_surface *dst,
 147                    unsigned buffers, double depth, unsigned stencil)
 148 {
 149    struct etna_context *ctx = etna_context(pctx);
 150    struct etna_surface *surf = etna_surface(dst);
 151    uint32_t new_clear_value = translate_clear_depth_stencil(surf->base.format, depth, stencil);
 152    uint32_t new_clear_bits = 0, clear_bits_depth, clear_bits_stencil;
 153
 154    /* Get the channels to clear */
 155    switch (surf->base.format) {
 156    case PIPE_FORMAT_Z16_UNORM:
 157       clear_bits_depth = 0xffff;
 158       clear_bits_stencil = 0;
 159       break;
 160    case PIPE_FORMAT_X8Z24_UNORM:
 161    case PIPE_FORMAT_S8_UINT_Z24_UNORM:
 162       clear_bits_depth = 0xeeee;
 163       clear_bits_stencil = 0x1111;
 164       break;
 165    default:
 166       clear_bits_depth = clear_bits_stencil = 0xffff;
 167       break;
 168    }
 169
 170    if (buffers & PIPE_CLEAR_DEPTH)
 171       new_clear_bits |= clear_bits_depth;
 172    if (buffers & PIPE_CLEAR_STENCIL)
 173       new_clear_bits |= clear_bits_stencil;
 174
 175    /* FIXME: when tile status is enabled, this becomes more complex as
 176     * we may separately clear the depth from the stencil.  In this case,
 177     * we want to resolve the surface, and avoid using the tile status.
 178     * We may be better off recording the pending clear operation,
 179     * delaying the actual clear to the first use.  This way, we can merge
 180     * consecutive clears together. */
 181    if (surf->surf.ts_size) { /* TS: use precompiled clear command */
 182       /* Set new clear depth value */
 183       ctx->framebuffer.TS_DEPTH_CLEAR_VALUE = new_clear_value;
 184       if (VIV_FEATURE(ctx->screen, chipMinorFeatures1, AUTO_DISABLE)) {
 185          /* Set number of depth tiles to be filled */
 186          etna_set_state(ctx->stream, VIVS_TS_DEPTH_AUTO_DISABLE_COUNT,
 187                         surf->surf.padded_width * surf->surf.padded_height / 16);
 188          ctx->framebuffer.TS_MEM_CONFIG |= VIVS_TS_MEM_CONFIG_DEPTH_AUTO_DISABLE;
 189       }
 190
 191       surf->level->ts_valid = true;
 192       ctx->dirty |= ETNA_DIRTY_TS;
 193    } else {
 194       if (unlikely(new_clear_value != surf->level->clear_value)) { /* Queue normal RS clear for non-TS surfaces */
 195          /* If clear depth value changed, re-generate stored command */
 196          etna_rs_gen_clear_surface(ctx, surf, new_clear_value);
 197       }
 198       /* Update the channels to be cleared */
 199       etna_modify_rs_clearbits(&surf->clear_command, new_clear_bits);
 200    }
 201
 202    etna_submit_rs_state(ctx, &surf->clear_command);
 203    surf->level->clear_value = new_clear_value;
 204    resource_written(ctx, surf->base.texture);
 205    etna_resource(surf->base.texture)->seqno++;
 206 }
 207
 208 static void
 209 etna_clear(struct pipe_context *pctx, unsigned buffers,
 210            const union pipe_color_union *color, double depth, unsigned stencil)
 211 {
 212    struct etna_context *ctx = etna_context(pctx);
 213
 214    /* Flush color and depth cache before clearing anything.
 215     * This is especially important when coming from another surface, as
 216     * otherwise it may clear part of the old surface instead. */
 217    etna_set_state(ctx->stream, VIVS_GL_FLUSH_CACHE, VIVS_GL_FLUSH_CACHE_COLOR | VIVS_GL_FLUSH_CACHE_DEPTH);
 218    etna_stall(ctx->stream, SYNC_RECIPIENT_RA, SYNC_RECIPIENT_PE);
 219
 220    /* Preparation: Flush the TS if needed. This must be done after flushing
 221     * color and depth, otherwise it can result in crashes */
 222    bool need_ts_flush = false;
 223    if ((buffers & PIPE_CLEAR_COLOR) && ctx->framebuffer_s.nr_cbufs) {
 224       struct etna_surface *surf = etna_surface(ctx->framebuffer_s.cbufs[0]);
 225       if (surf->surf.ts_size)
 226          need_ts_flush = true;
 227    }
 228    if ((buffers & PIPE_CLEAR_DEPTHSTENCIL) && ctx->framebuffer_s.zsbuf != NULL) {
 229       struct etna_surface *surf = etna_surface(ctx->framebuffer_s.zsbuf);
 230
 231       if (surf->surf.ts_size)
 232          need_ts_flush = true;
 233    }
 234
 235    if (need_ts_flush)
 236       etna_set_state(ctx->stream, VIVS_TS_FLUSH_CACHE, VIVS_TS_FLUSH_CACHE_FLUSH);
 237
 238    /* No need to set up the TS here as RS clear operations (in contrast to
 239     * resolve and copy) do not require the TS state.
 240     */
 241    if (buffers & PIPE_CLEAR_COLOR) {
 242       for (int idx = 0; idx < ctx->framebuffer_s.nr_cbufs; ++idx) {
 243          etna_blit_clear_color(pctx, ctx->framebuffer_s.cbufs[idx],
 244                                &color[idx]);
 245       }
 246    }
 247
 248    /* Flush the color and depth caches before each RS clear operation
 249     * This fixes a hang on GC600. */
 250    if (buffers & PIPE_CLEAR_DEPTHSTENCIL && buffers & PIPE_CLEAR_COLOR)
 251       etna_set_state(ctx->stream, VIVS_GL_FLUSH_CACHE,
 252                      VIVS_GL_FLUSH_CACHE_COLOR | VIVS_GL_FLUSH_CACHE_DEPTH);
 253
 254    if ((buffers & PIPE_CLEAR_DEPTHSTENCIL) && ctx->framebuffer_s.zsbuf != NULL)
 255       etna_blit_clear_zs(pctx, ctx->framebuffer_s.zsbuf, buffers, depth, stencil);
 256
 257    etna_stall(ctx->stream, SYNC_RECIPIENT_RA, SYNC_RECIPIENT_PE);
 258 }
 259
 260 static void
 261 etna_clear_render_target(struct pipe_context *pctx, struct pipe_surface *dst,
 262                          const union pipe_color_union *color, unsigned dstx,
 263                          unsigned dsty, unsigned width, unsigned height,
 264                          bool render_condition_enabled)
 265 {
 266    struct etna_context *ctx = etna_context(pctx);
 267
 268    /* XXX could fall back to RS when target area is full screen / resolveable
 269     * and no TS. */
 270    etna_blit_save_state(ctx);
 271    util_blitter_clear_render_target(ctx->blitter, dst, color, dstx, dsty, width, height);
 272 }
 273
 274 static void
 275 etna_clear_depth_stencil(struct pipe_context *pctx, struct pipe_surface *dst,
 276                          unsigned clear_flags, double depth, unsigned stencil,
 277                          unsigned dstx, unsigned dsty, unsigned width,
 278                          unsigned height, bool render_condition_enabled)
 279 {
 280    struct etna_context *ctx = etna_context(pctx);
 281
 282    /* XXX could fall back to RS when target area is full screen / resolveable
 283     * and no TS. */
 284    etna_blit_save_state(ctx);
 285    util_blitter_clear_depth_stencil(ctx->blitter, dst, clear_flags, depth,
 286                                     stencil, dstx, dsty, width, height);
 287 }
 288
 289 static void
 290 etna_resource_copy_region(struct pipe_context *pctx, struct pipe_resource *dst,
 291                           unsigned dst_level, unsigned dstx, unsigned dsty,
 292                           unsigned dstz, struct pipe_resource *src,
 293                           unsigned src_level, const struct pipe_box *src_box)
 294 {
 295    struct etna_context *ctx = etna_context(pctx);
 296
 297    /* The resource must be of the same format. */
 298    assert(src->format == dst->format);
 299
 300    /* XXX we can use the RS as a literal copy engine here
 301     * the only complexity is tiling; the size of the boxes needs to be aligned
 302     * to the tile size
 303     * how to handle the case where a resource is copied from/to a non-aligned
 304     * position?
 305     * from non-aligned: can fall back to rendering-based copy?
 306     * to non-aligned: can fall back to rendering-based copy?
 307     * XXX this goes wrong when source surface is supertiled.
 308     */
 309    if (util_blitter_is_copy_supported(ctx->blitter, dst, src)) {
 310       etna_blit_save_state(ctx);
 311       util_blitter_copy_texture(ctx->blitter, dst, dst_level, dstx, dsty, dstz,
 312                                 src, src_level, src_box);
 313    } else {
 314       util_resource_copy_region(pctx, dst, dst_level, dstx, dsty, dstz, src,
 315                                 src_level, src_box);
 316    }
 317 }
 318
 319 static bool
 320 etna_manual_blit(struct etna_resource *dst, struct etna_resource_level *dst_lev,
 321                  unsigned int dst_offset, struct etna_resource *src,
 322                  struct etna_resource_level *src_lev, unsigned int src_offset,
 323                  const struct pipe_blit_info *blit_info)
 324 {
 325    void *smap, *srow, *dmap, *drow;
 326    size_t tile_size;
 327
 328    assert(src->layout == ETNA_LAYOUT_TILED);
 329    assert(dst->layout == ETNA_LAYOUT_TILED);
 330    assert(src->base.nr_samples == 0);
 331    assert(dst->base.nr_samples == 0);
 332
 333    tile_size = util_format_get_blocksize(blit_info->src.format) * 4 * 4;
 334
 335    smap = etna_bo_map(src->bo);
 336    if (!smap)
 337       return false;
 338
 339    dmap = etna_bo_map(dst->bo);
 340    if (!dmap)
 341       return false;
 342
 343    srow = smap + src_offset;
 344    drow = dmap + dst_offset;
 345
 346    etna_bo_cpu_prep(src->bo, DRM_ETNA_PREP_READ);
 347    etna_bo_cpu_prep(dst->bo, DRM_ETNA_PREP_WRITE);
 348
 349    for (int y = 0; y < blit_info->src.box.height; y += 4) {
 350       memcpy(drow, srow, tile_size * blit_info->src.box.width);
 351       srow += src_lev->stride * 4;
 352       drow += dst_lev->stride * 4;
 353    }
 354
 355    etna_bo_cpu_fini(dst->bo);
 356    etna_bo_cpu_fini(src->bo);
 357
 358    return true;
 359 }
 360
 361 static bool
 362 etna_try_rs_blit(struct pipe_context *pctx,
 363                  const struct pipe_blit_info *blit_info)
 364 {
 365    struct etna_context *ctx = etna_context(pctx);
 366    struct etna_resource *src = etna_resource(blit_info->src.resource);
 367    struct etna_resource *dst = etna_resource(blit_info->dst.resource);
 368    struct compiled_rs_state copy_to_screen;
 369    uint32_t ts_mem_config = 0;
 370    int msaa_xscale = 1, msaa_yscale = 1;
 371
 372    /* Ensure that the level is valid */
 373    assert(blit_info->src.level <= src->base.last_level);
 374    assert(blit_info->dst.level <= dst->base.last_level);
 375
 376    if (!translate_samples_to_xyscale(src->base.nr_samples, &msaa_xscale, &msaa_yscale, NULL))
 377       return FALSE;
 378
 379    /* The width/height are in pixels; they do not change as a result of
 380     * multi-sampling. So, when blitting from a 4x multisampled surface
 381     * to a non-multisampled surface, the width and height will be
 382     * identical. As we do not support scaling, reject different sizes. */
 383    if (blit_info->dst.box.width != blit_info->src.box.width ||
 384        blit_info->dst.box.height != blit_info->src.box.height) {
 385       DBG("scaling requested: source %dx%d destination %dx%d",
 386           blit_info->src.box.width, blit_info->src.box.height,
 387           blit_info->dst.box.width, blit_info->dst.box.height);
 388       return FALSE;
 389    }
 390
 391    /* No masks - RS can't copy specific channels */
 392    unsigned mask = util_format_get_mask(blit_info->dst.format);
 393    if ((blit_info->mask & mask) != mask) {
 394       DBG("sub-mask requested: 0x%02x vs format mask 0x%02x", blit_info->mask, mask);
 395       return FALSE;
 396    }
 397
 398    unsigned src_format = etna_compatible_rs_format(blit_info->src.format);
 399    unsigned dst_format = etna_compatible_rs_format(blit_info->src.format);
 400    if (translate_rs_format(src_format) == ETNA_NO_MATCH ||
 401        translate_rs_format(dst_format) == ETNA_NO_MATCH ||
 402        blit_info->scissor_enable || blit_info->src.box.x != 0 ||
 403        blit_info->src.box.y != 0 || blit_info->dst.box.x != 0 ||
 404        blit_info->dst.box.y != 0 ||
 405        blit_info->dst.box.depth != blit_info->src.box.depth ||
 406        blit_info->dst.box.depth != 1) {
 407       return FALSE;
 408    }
 409
 410    /* Ensure that the Z coordinate is sane */
 411    if (dst->base.target != PIPE_TEXTURE_CUBE)
 412       assert(blit_info->dst.box.z == 0);
 413    if (src->base.target != PIPE_TEXTURE_CUBE)
 414       assert(blit_info->src.box.z == 0);
 415
 416    assert(blit_info->src.box.z < src->base.array_size);
 417    assert(blit_info->dst.box.z < dst->base.array_size);
 418
 419    struct etna_resource_level *src_lev = &src->levels[blit_info->src.level];
 420    struct etna_resource_level *dst_lev = &dst->levels[blit_info->dst.level];
 421
 422    /* we may be given coordinates up to the padded width to avoid
 423     * any alignment issues with different tiling formats */
 424    assert((blit_info->src.box.x + blit_info->src.box.width) * msaa_xscale <= src_lev->padded_width);
 425    assert((blit_info->src.box.y + blit_info->src.box.height) * msaa_yscale <= src_lev->padded_height);
 426    assert(blit_info->dst.box.x + blit_info->dst.box.width <= dst_lev->padded_width);
 427    assert(blit_info->dst.box.y + blit_info->dst.box.height <= dst_lev->padded_height);
 428
 429    unsigned src_offset =
 430       src_lev->offset + blit_info->src.box.z * src_lev->layer_stride;
 431    unsigned dst_offset =
 432       dst_lev->offset + blit_info->dst.box.z * dst_lev->layer_stride;
 433
 434    if (src_lev->padded_width <= ETNA_RS_WIDTH_MASK ||
 435        dst_lev->padded_width <= ETNA_RS_WIDTH_MASK ||
 436        src_lev->padded_height <= ETNA_RS_HEIGHT_MASK ||
 437        dst_lev->padded_height <= ETNA_RS_HEIGHT_MASK)
 438       goto manual;
 439
 440    /* If the width is not aligned to the RS width, but is within our
 441     * padding, adjust the width to suite the RS width restriction.
 442     * Note: the RS width/height are converted to source samples here. */
 443    unsigned int width = blit_info->src.box.width * msaa_xscale;
 444    unsigned int height = blit_info->src.box.height * msaa_yscale;
 445    unsigned int w_align = ETNA_RS_WIDTH_MASK + 1;
 446    unsigned int h_align = (ETNA_RS_HEIGHT_MASK + 1) * ctx->specs.pixel_pipes;
 447
 448    if (width & (w_align - 1) && width >= src_lev->width * msaa_xscale && width >= dst_lev->width)
 449       width = align(width, w_align);
 450
 451    if (height & (h_align - 1) && height >= src_lev->height * msaa_yscale && height >= dst_lev->height)
 452       height = align(height, h_align);
 453
 454    /* The padded dimensions are in samples */
 455    if (width > src_lev->padded_width ||
 456        width > dst_lev->padded_width * msaa_xscale ||
 457        height > src_lev->padded_height ||
 458        height > dst_lev->padded_height * msaa_yscale ||
 459        width & (w_align - 1) || height & (h_align - 1))
 460       goto manual;
 461
 462    if (src->base.nr_samples > 1) {
 463       uint32_t msaa_format = translate_msaa_format(src_format);
 464       assert(msaa_format != ETNA_NO_MATCH);
 465       ts_mem_config |= VIVS_TS_MEM_CONFIG_MSAA | msaa_format;
 466    }
 467
 468    /* Always flush color and depth cache together before resolving. This works
 469     * around artifacts that appear in some cases when scanning out a texture
 470     * directly after it has been rendered to, such as rendering an animated web
 471     * page in a QtWebEngine based WebView on GC2000. The artifacts look like
 472     * the texture sampler samples zeroes instead of texture data in a small,
 473     * irregular triangle in the lower right of each browser tile quad. Other
 474     * attempts to avoid these artifacts, including a pipeline stall before the
 475     * color flush or a TS cache flush afterwards, or flushing multiple times,
 476     * with stalls before and after each flush, have shown no effect. */
 477    if (src->base.bind & PIPE_BIND_RENDER_TARGET ||
 478        src->base.bind & PIPE_BIND_DEPTH_STENCIL) {
 479       etna_set_state(ctx->stream, VIVS_GL_FLUSH_CACHE,
 480                      VIVS_GL_FLUSH_CACHE_COLOR | VIVS_GL_FLUSH_CACHE_DEPTH);
 481       etna_stall(ctx->stream, SYNC_RECIPIENT_RA, SYNC_RECIPIENT_PE);
 482
 483       if (src->levels[blit_info->src.level].ts_size &&
 484           src->levels[blit_info->src.level].ts_valid)
 485          etna_set_state(ctx->stream, VIVS_TS_FLUSH_CACHE, VIVS_TS_FLUSH_CACHE_FLUSH);
 486    }
 487
 488    /* Set up color TS to source surface before blit, if needed */
 489    if (src->levels[blit_info->src.level].ts_size &&
 490        src->levels[blit_info->src.level].ts_valid) {
 491       struct etna_reloc reloc;
 492       unsigned ts_offset =
 493          src_lev->ts_offset + blit_info->src.box.z * src_lev->ts_layer_stride;
 494
 495       etna_set_state(ctx->stream, VIVS_TS_MEM_CONFIG,
 496                      VIVS_TS_MEM_CONFIG_COLOR_FAST_CLEAR | ts_mem_config);
 497
 498       memset(&reloc, 0, sizeof(struct etna_reloc));
 499       reloc.bo = src->ts_bo;
 500       reloc.offset = ts_offset;
 501       reloc.flags = ETNA_RELOC_READ;
 502       etna_set_state_reloc(ctx->stream, VIVS_TS_COLOR_STATUS_BASE, &reloc);
 503
 504       memset(&reloc, 0, sizeof(struct etna_reloc));
 505       reloc.bo = src->bo;
 506       reloc.offset = src_offset;
 507       reloc.flags = ETNA_RELOC_READ;
 508       etna_set_state_reloc(ctx->stream, VIVS_TS_COLOR_SURFACE_BASE, &reloc);
 509
 510       etna_set_state(ctx->stream, VIVS_TS_COLOR_CLEAR_VALUE,
 511                      src->levels[blit_info->src.level].clear_value);
 512    } else {
 513       etna_set_state(ctx->stream, VIVS_TS_MEM_CONFIG, ts_mem_config);
 514    }
 515    ctx->dirty |= ETNA_DIRTY_TS;
 516
 517    /* Kick off RS here */
 518    etna_compile_rs_state(ctx, &copy_to_screen, &(struct rs_state) {
 519       .source_format = translate_rs_format(src_format),
 520       .source_tiling = src->layout,
 521       .source = src->bo,
 522       .source_offset = src_offset,
 523       .source_stride = src_lev->stride,
 524       .source_padded_height = src_lev->padded_height,
 525       .dest_format = translate_rs_format(dst_format),
 526       .dest_tiling = dst->layout,
 527       .dest = dst->bo,
 528       .dest_offset = dst_offset,
 529       .dest_stride = dst_lev->stride,
 530       .dest_padded_height = dst_lev->padded_height,
 531       .downsample_x = msaa_xscale > 1,
 532       .downsample_y = msaa_yscale > 1,
 533       .swap_rb = translate_rb_src_dst_swap(src->base.format, dst->base.format),
 534       .dither = {0xffffffff, 0xffffffff}, // XXX dither when going from 24 to 16 bit?
 535       .clear_mode = VIVS_RS_CLEAR_CONTROL_MODE_DISABLED,
 536       .width = width,
 537       .height = height
 538    });
 539
 540    etna_submit_rs_state(ctx, &copy_to_screen);
 541    resource_written(ctx, &dst->base);
 542    dst->seqno++;
 543    dst->levels[blit_info->dst.level].ts_valid = false;
 544
 545    return TRUE;
 546
 547 manual:
 548    if (src->layout == ETNA_LAYOUT_TILED && dst->layout == ETNA_LAYOUT_TILED) {
 549       if ((src->status & ETNA_PENDING_WRITE) ||
 550           (dst->status & ETNA_PENDING_WRITE))
 551          pctx->flush(pctx, NULL, 0);
 552       return etna_manual_blit(dst, dst_lev, dst_offset, src, src_lev, src_offset, blit_info);
 553    }
 554
 555    return FALSE;
 556 }
 557
 558 static void
 559 etna_blit(struct pipe_context *pctx, const struct pipe_blit_info *blit_info)
 560 {
 561    /* This is a more extended version of resource_copy_region */
 562    /* TODO Some cases can be handled by RS; if not, fall back to rendering or
 563     * even CPU copy block of pixels from info->src to info->dst
 564     * (resource, level, box, format);
 565     * function is used for scaling, flipping in x and y direction (negative
 566     * width/height), format conversion, mask and filter and even a scissor rectangle
 567     *
 568     * What can the RS do for us:
 569     *   convert between tiling formats (layouts)
 570     *   downsample 2x in x and y
 571     *   convert between a limited number of pixel formats
 572     *
 573     * For the rest, fall back to util_blitter
 574     * XXX this goes wrong when source surface is supertiled. */
 575    struct etna_context *ctx = etna_context(pctx);
 576    struct pipe_blit_info info = *blit_info;
 577
 578    if (info.src.resource->nr_samples > 1 &&
 579        info.dst.resource->nr_samples <= 1 &&
 580        !util_format_is_depth_or_stencil(info.src.resource->format) &&
 581        !util_format_is_pure_integer(info.src.resource->format)) {
 582       DBG("color resolve unimplemented");
 583       return;
 584    }
 585
 586    if (etna_try_rs_blit(pctx, blit_info))
 587       return;
 588
 589    if (util_try_blit_via_copy_region(pctx, blit_info))
 590       return;
 591
 592    if (info.mask & PIPE_MASK_S) {
 593       DBG("cannot blit stencil, skipping");
 594       info.mask &= ~PIPE_MASK_S;
 595    }
 596
 597    if (!util_blitter_is_blit_supported(ctx->blitter, &info)) {
 598       DBG("blit unsupported %s -> %s",
 599           util_format_short_name(info.src.resource->format),
 600           util_format_short_name(info.dst.resource->format));
 601       return;
 602    }
 603
 604    etna_blit_save_state(ctx);
 605    util_blitter_blit(ctx->blitter, &info);
 606 }
 607
 608 static void
 609 etna_flush_resource(struct pipe_context *pctx, struct pipe_resource *prsc)
 610 {
 611    struct etna_resource *rsc = etna_resource(prsc);
 612
 613    if (rsc->scanout) {
 614       if (etna_resource_older(etna_resource(rsc->scanout->prime), rsc)) {
 615          etna_copy_resource(pctx, rsc->scanout->prime, prsc, 0, 0);
 616          etna_resource(rsc->scanout->prime)->seqno = rsc->seqno;
 617       }
 618    } else if (etna_resource_needs_flush(rsc)) {
 619       etna_copy_resource(pctx, prsc, prsc, 0, 0);
 620       rsc->flush_seqno = rsc->seqno;
 621    }
 622 }
 623
 624 void
 625 etna_copy_resource(struct pipe_context *pctx, struct pipe_resource *dst,
 626                    struct pipe_resource *src, int first_level, int last_level)
 627 {
 628    struct etna_resource *src_priv = etna_resource(src);
 629    struct etna_resource *dst_priv = etna_resource(dst);
 630
 631    assert(src->format == dst->format);
 632    assert(src->array_size == dst->array_size);
 633    assert(last_level <= dst->last_level && last_level <= src->last_level);
 634
 635    struct pipe_blit_info blit = {};
 636    blit.mask = util_format_get_mask(dst->format);
 637    blit.filter = PIPE_TEX_FILTER_NEAREST;
 638    blit.src.resource = src;
 639    blit.src.format = src->format;
 640    blit.dst.resource = dst;
 641    blit.dst.format = dst->format;
 642    blit.dst.box.depth = blit.src.box.depth = 1;
 643
 644    /* Copy each level and each layer */
 645    for (int level = first_level; level <= last_level; level++) {
 646       blit.src.level = blit.dst.level = level;
 647       blit.src.box.width = blit.dst.box.width =
 648          MIN2(src_priv->levels[level].padded_width, dst_priv->levels[level].padded_width);
 649       blit.src.box.height = blit.dst.box.height =
 650          MIN2(src_priv->levels[level].padded_height, dst_priv->levels[level].padded_height);
 651
 652       for (int layer = 0; layer < dst->array_size; layer++) {
 653          blit.src.box.z = blit.dst.box.z = layer;
 654          pctx->blit(pctx, &blit);
 655       }
 656    }
 657 }
 658
 659 void
 660 etna_clear_blit_init(struct pipe_context *pctx)
 661 {
 662    pctx->clear = etna_clear;
 663    pctx->clear_render_target = etna_clear_render_target;
 664    pctx->clear_depth_stencil = etna_clear_depth_stencil;
 665    pctx->resource_copy_region = etna_resource_copy_region;
 666    pctx->blit = etna_blit;
 667    pctx->flush_resource = etna_flush_resource;
 668 }