drivers/gpu/drm/arm/malidp_planes.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * (C) COPYRIGHT 2016 ARM Limited. All rights reserved.
   4  * Author: Liviu Dudau <[email protected]>
   5  *
   6  * ARM Mali DP plane manipulation routines.
   7  */
   8
   9 #include <linux/iommu.h>
  10 #include <linux/platform_device.h>
  11
  12 #include <drm/drm_atomic.h>
  13 #include <drm/drm_atomic_helper.h>
  14 #include <drm/drm_drv.h>
  15 #include <drm/drm_fb_cma_helper.h>
  16 #include <drm/drm_fourcc.h>
  17 #include <drm/drm_gem_cma_helper.h>
  18 #include <drm/drm_gem_framebuffer_helper.h>
  19 #include <drm/drm_plane_helper.h>
  20 #include <drm/drm_print.h>
  21
  22 #include "malidp_hw.h"
  23 #include "malidp_drv.h"
  24
  25 /* Layer specific register offsets */
  26 #define MALIDP_LAYER_FORMAT             0x000
  27 #define   LAYER_FORMAT_MASK             0x3f
  28 #define MALIDP_LAYER_CONTROL            0x004
  29 #define   LAYER_ENABLE                  (1 << 0)
  30 #define   LAYER_FLOWCFG_MASK            7
  31 #define   LAYER_FLOWCFG(x)              (((x) & LAYER_FLOWCFG_MASK) << 1)
  32 #define     LAYER_FLOWCFG_SCALE_SE      3
  33 #define   LAYER_ROT_OFFSET              8
  34 #define   LAYER_H_FLIP                  (1 << 10)
  35 #define   LAYER_V_FLIP                  (1 << 11)
  36 #define   LAYER_ROT_MASK                (0xf << 8)
  37 #define   LAYER_COMP_MASK               (0x3 << 12)
  38 #define   LAYER_COMP_PIXEL              (0x3 << 12)
  39 #define   LAYER_COMP_PLANE              (0x2 << 12)
  40 #define   LAYER_PMUL_ENABLE             (0x1 << 14)
  41 #define   LAYER_ALPHA_OFFSET            (16)
  42 #define   LAYER_ALPHA_MASK              (0xff)
  43 #define   LAYER_ALPHA(x)                (((x) & LAYER_ALPHA_MASK) << LAYER_ALPHA_OFFSET)
  44 #define MALIDP_LAYER_COMPOSE            0x008
  45 #define MALIDP_LAYER_SIZE               0x00c
  46 #define   LAYER_H_VAL(x)                (((x) & 0x1fff) << 0)
  47 #define   LAYER_V_VAL(x)                (((x) & 0x1fff) << 16)
  48 #define MALIDP_LAYER_COMP_SIZE          0x010
  49 #define MALIDP_LAYER_OFFSET             0x014
  50 #define MALIDP550_LS_ENABLE             0x01c
  51 #define MALIDP550_LS_R1_IN_SIZE         0x020
  52
  53 #define MODIFIERS_COUNT_MAX             15
  54
  55 /*
  56  * This 4-entry look-up-table is used to determine the full 8-bit alpha value
  57  * for formats with 1- or 2-bit alpha channels.
  58  * We set it to give 100%/0% opacity for 1-bit formats and 100%/66%/33%/0%
  59  * opacity for 2-bit formats.
  60  */
  61 #define MALIDP_ALPHA_LUT 0xffaa5500
  62
  63 /* page sizes the MMU prefetcher can support */
  64 #define MALIDP_MMU_PREFETCH_PARTIAL_PGSIZES     (SZ_4K | SZ_64K)
  65 #define MALIDP_MMU_PREFETCH_FULL_PGSIZES        (SZ_1M | SZ_2M)
  66
  67 /* readahead for partial-frame prefetch */
  68 #define MALIDP_MMU_PREFETCH_READAHEAD           8
  69
  70 static void malidp_de_plane_destroy(struct drm_plane *plane)
  71 {
  72         struct malidp_plane *mp = to_malidp_plane(plane);
  73
  74         drm_plane_cleanup(plane);
  75         kfree(mp);
  76 }
  77
  78 /*
  79  * Replicate what the default ->reset hook does: free the state pointer and
  80  * allocate a new empty object. We just need enough space to store
  81  * a malidp_plane_state instead of a drm_plane_state.
  82  */
  83 static void malidp_plane_reset(struct drm_plane *plane)
  84 {
  85         struct malidp_plane_state *state = to_malidp_plane_state(plane->state);
  86
  87         if (state)
  88                 __drm_atomic_helper_plane_destroy_state(&state->base);
  89         kfree(state);
  90         plane->state = NULL;
  91         state = kzalloc(sizeof(*state), GFP_KERNEL);
  92         if (state)
  93                 __drm_atomic_helper_plane_reset(plane, &state->base);
  94 }
  95
  96 static struct
  97 drm_plane_state *malidp_duplicate_plane_state(struct drm_plane *plane)
  98 {
  99         struct malidp_plane_state *state, *m_state;
 100
 101         if (!plane->state)
 102                 return NULL;
 103
 104         state = kmalloc(sizeof(*state), GFP_KERNEL);
 105         if (!state)
 106                 return NULL;
 107
 108         m_state = to_malidp_plane_state(plane->state);
 109         __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
 110         state->rotmem_size = m_state->rotmem_size;
 111         state->format = m_state->format;
 112         state->n_planes = m_state->n_planes;
 113
 114         state->mmu_prefetch_mode = m_state->mmu_prefetch_mode;
 115         state->mmu_prefetch_pgsize = m_state->mmu_prefetch_pgsize;
 116
 117         return &state->base;
 118 }
 119
 120 static void malidp_destroy_plane_state(struct drm_plane *plane,
 121                                        struct drm_plane_state *state)
 122 {
 123         struct malidp_plane_state *m_state = to_malidp_plane_state(state);
 124
 125         __drm_atomic_helper_plane_destroy_state(state);
 126         kfree(m_state);
 127 }
 128
 129 static const char * const prefetch_mode_names[] = {
 130         [MALIDP_PREFETCH_MODE_NONE] = "MMU_PREFETCH_NONE",
 131         [MALIDP_PREFETCH_MODE_PARTIAL] = "MMU_PREFETCH_PARTIAL",
 132         [MALIDP_PREFETCH_MODE_FULL] = "MMU_PREFETCH_FULL",
 133 };
 134
 135 static void malidp_plane_atomic_print_state(struct drm_printer *p,
 136                                             const struct drm_plane_state *state)
 137 {
 138         struct malidp_plane_state *ms = to_malidp_plane_state(state);
 139
 140         drm_printf(p, "\trotmem_size=%u\n", ms->rotmem_size);
 141         drm_printf(p, "\tformat_id=%u\n", ms->format);
 142         drm_printf(p, "\tn_planes=%u\n", ms->n_planes);
 143         drm_printf(p, "\tmmu_prefetch_mode=%s\n",
 144                    prefetch_mode_names[ms->mmu_prefetch_mode]);
 145         drm_printf(p, "\tmmu_prefetch_pgsize=%d\n", ms->mmu_prefetch_pgsize);
 146 }
 147
 148 bool malidp_format_mod_supported(struct drm_device *drm,
 149                                  u32 format, u64 modifier)
 150 {
 151         const struct drm_format_info *info;
 152         const u64 *modifiers;
 153         struct malidp_drm *malidp = drm->dev_private;
 154         const struct malidp_hw_regmap *map = &malidp->dev->hw->map;
 155
 156         if (WARN_ON(modifier == DRM_FORMAT_MOD_INVALID))
 157                 return false;
 158
 159         /* Some pixel formats are supported without any modifier */
 160         if (modifier == DRM_FORMAT_MOD_LINEAR) {
 161                 /*
 162                  * However these pixel formats need to be supported with
 163                  * modifiers only
 164                  */
 165                 return !malidp_hw_format_is_afbc_only(format);
 166         }
 167
 168         if ((modifier >> 56) != DRM_FORMAT_MOD_VENDOR_ARM) {
 169                 DRM_ERROR("Unknown modifier (not Arm)\n");
 170                 return false;
 171         }
 172
 173         if (modifier &
 174             ~DRM_FORMAT_MOD_ARM_AFBC(AFBC_MOD_VALID_BITS)) {
 175                 DRM_DEBUG_KMS("Unsupported modifiers\n");
 176                 return false;
 177         }
 178
 179         modifiers = malidp_format_modifiers;
 180
 181         /* SPLIT buffers must use SPARSE layout */
 182         if (WARN_ON_ONCE((modifier & AFBC_SPLIT) && !(modifier & AFBC_SPARSE)))
 183                 return false;
 184
 185         /* CBR only applies to YUV formats, where YTR should be always 0 */
 186         if (WARN_ON_ONCE((modifier & AFBC_CBR) && (modifier & AFBC_YTR)))
 187                 return false;
 188
 189         while (*modifiers != DRM_FORMAT_MOD_INVALID) {
 190                 if (*modifiers == modifier)
 191                         break;
 192
 193                 modifiers++;
 194         }
 195
 196         /* return false, if the modifier was not found */
 197         if (*modifiers == DRM_FORMAT_MOD_INVALID) {
 198                 DRM_DEBUG_KMS("Unsupported modifier\n");
 199                 return false;
 200         }
 201
 202         info = drm_format_info(format);
 203
 204         if (info->num_planes != 1) {
 205                 DRM_DEBUG_KMS("AFBC buffers expect one plane\n");
 206                 return false;
 207         }
 208
 209         if (malidp_hw_format_is_linear_only(format) == true) {
 210                 DRM_DEBUG_KMS("Given format (0x%x) is supported is linear mode only\n",
 211                               format);
 212                 return false;
 213         }
 214
 215         /*
 216          * RGB formats need to provide YTR modifier and YUV formats should not
 217          * provide YTR modifier.
 218          */
 219         if (!(info->is_yuv) != !!(modifier & AFBC_FORMAT_MOD_YTR)) {
 220                 DRM_DEBUG_KMS("AFBC_FORMAT_MOD_YTR is %s for %s formats\n",
 221                               info->is_yuv ? "disallowed" : "mandatory",
 222                               info->is_yuv ? "YUV" : "RGB");
 223                 return false;
 224         }
 225
 226         if (modifier & AFBC_SPLIT) {
 227                 if (!info->is_yuv) {
 228                         if (info->cpp[0] <= 2) {
 229                                 DRM_DEBUG_KMS("RGB formats <= 16bpp are not supported with SPLIT\n");
 230                                 return false;
 231                         }
 232                 }
 233
 234                 if ((info->hsub != 1) || (info->vsub != 1)) {
 235                         if (!(format == DRM_FORMAT_YUV420_10BIT &&
 236                               (map->features & MALIDP_DEVICE_AFBC_YUV_420_10_SUPPORT_SPLIT))) {
 237                                 DRM_DEBUG_KMS("Formats which are sub-sampled should never be split\n");
 238                                 return false;
 239                         }
 240                 }
 241         }
 242
 243         if (modifier & AFBC_CBR) {
 244                 if ((info->hsub == 1) || (info->vsub == 1)) {
 245                         DRM_DEBUG_KMS("Formats which are not sub-sampled should not have CBR set\n");
 246                         return false;
 247                 }
 248         }
 249
 250         return true;
 251 }
 252
 253 static bool malidp_format_mod_supported_per_plane(struct drm_plane *plane,
 254                                                   u32 format, u64 modifier)
 255 {
 256         return malidp_format_mod_supported(plane->dev, format, modifier);
 257 }
 258
 259 static const struct drm_plane_funcs malidp_de_plane_funcs = {
 260         .update_plane = drm_atomic_helper_update_plane,
 261         .disable_plane = drm_atomic_helper_disable_plane,
 262         .destroy = malidp_de_plane_destroy,
 263         .reset = malidp_plane_reset,
 264         .atomic_duplicate_state = malidp_duplicate_plane_state,
 265         .atomic_destroy_state = malidp_destroy_plane_state,
 266         .atomic_print_state = malidp_plane_atomic_print_state,
 267         .format_mod_supported = malidp_format_mod_supported_per_plane,
 268 };
 269
 270 static int malidp_se_check_scaling(struct malidp_plane *mp,
 271                                    struct drm_plane_state *state)
 272 {
 273         struct drm_crtc_state *crtc_state =
 274                 drm_atomic_get_existing_crtc_state(state->state, state->crtc);
 275         struct malidp_crtc_state *mc;
 276         u32 src_w, src_h;
 277         int ret;
 278
 279         if (!crtc_state)
 280                 return -EINVAL;
 281
 282         mc = to_malidp_crtc_state(crtc_state);
 283
 284         ret = drm_atomic_helper_check_plane_state(state, crtc_state,
 285                                                   0, INT_MAX, true, true);
 286         if (ret)
 287                 return ret;
 288
 289         if (state->rotation & MALIDP_ROTATED_MASK) {
 290                 src_w = state->src_h >> 16;
 291                 src_h = state->src_w >> 16;
 292         } else {
 293                 src_w = state->src_w >> 16;
 294                 src_h = state->src_h >> 16;
 295         }
 296
 297         if ((state->crtc_w == src_w) && (state->crtc_h == src_h)) {
 298                 /* Scaling not necessary for this plane. */
 299                 mc->scaled_planes_mask &= ~(mp->layer->id);
 300                 return 0;
 301         }
 302
 303         if (mp->layer->id & (DE_SMART | DE_GRAPHICS2))
 304                 return -EINVAL;
 305
 306         mc->scaled_planes_mask |= mp->layer->id;
 307         /* Defer scaling requirements calculation to the crtc check. */
 308         return 0;
 309 }
 310
 311 static u32 malidp_get_pgsize_bitmap(struct malidp_plane *mp)
 312 {
 313         u32 pgsize_bitmap = 0;
 314
 315         if (iommu_present(&platform_bus_type)) {
 316                 struct iommu_domain *mmu_dom =
 317                         iommu_get_domain_for_dev(mp->base.dev->dev);
 318
 319                 if (mmu_dom)
 320                         pgsize_bitmap = mmu_dom->pgsize_bitmap;
 321         }
 322
 323         return pgsize_bitmap;
 324 }
 325
 326 /*
 327  * Check if the framebuffer is entirely made up of pages at least pgsize in
 328  * size. Only a heuristic: assumes that each scatterlist entry has been aligned
 329  * to the largest page size smaller than its length and that the MMU maps to
 330  * the largest page size possible.
 331  */
 332 static bool malidp_check_pages_threshold(struct malidp_plane_state *ms,
 333                                          u32 pgsize)
 334 {
 335         int i;
 336
 337         for (i = 0; i < ms->n_planes; i++) {
 338                 struct drm_gem_object *obj;
 339                 struct drm_gem_cma_object *cma_obj;
 340                 struct sg_table *sgt;
 341                 struct scatterlist *sgl;
 342
 343                 obj = drm_gem_fb_get_obj(ms->base.fb, i);
 344                 cma_obj = to_drm_gem_cma_obj(obj);
 345
 346                 if (cma_obj->sgt)
 347                         sgt = cma_obj->sgt;
 348                 else
 349                         sgt = obj->dev->driver->gem_prime_get_sg_table(obj);
 350
 351                 if (!sgt)
 352                         return false;
 353
 354                 sgl = sgt->sgl;
 355
 356                 while (sgl) {
 357                         if (sgl->length < pgsize) {
 358                                 if (!cma_obj->sgt)
 359                                         kfree(sgt);
 360                                 return false;
 361                         }
 362
 363                         sgl = sg_next(sgl);
 364                 }
 365                 if (!cma_obj->sgt)
 366                         kfree(sgt);
 367         }
 368
 369         return true;
 370 }
 371
 372 /*
 373  * Check if it is possible to enable partial-frame MMU prefetch given the
 374  * current format, AFBC state and rotation.
 375  */
 376 static bool malidp_partial_prefetch_supported(u32 format, u64 modifier,
 377                                               unsigned int rotation)
 378 {
 379         bool afbc, sparse;
 380
 381         /* rotation and horizontal flip not supported for partial prefetch */
 382         if (rotation & (DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_180 |
 383                         DRM_MODE_ROTATE_270 | DRM_MODE_REFLECT_X))
 384                 return false;
 385
 386         afbc = modifier & DRM_FORMAT_MOD_ARM_AFBC(0);
 387         sparse = modifier & AFBC_FORMAT_MOD_SPARSE;
 388
 389         switch (format) {
 390         case DRM_FORMAT_ARGB2101010:
 391         case DRM_FORMAT_RGBA1010102:
 392         case DRM_FORMAT_BGRA1010102:
 393         case DRM_FORMAT_ARGB8888:
 394         case DRM_FORMAT_RGBA8888:
 395         case DRM_FORMAT_BGRA8888:
 396         case DRM_FORMAT_XRGB8888:
 397         case DRM_FORMAT_XBGR8888:
 398         case DRM_FORMAT_RGBX8888:
 399         case DRM_FORMAT_BGRX8888:
 400         case DRM_FORMAT_RGB888:
 401         case DRM_FORMAT_RGBA5551:
 402         case DRM_FORMAT_RGB565:
 403                 /* always supported */
 404                 return true;
 405
 406         case DRM_FORMAT_ABGR2101010:
 407         case DRM_FORMAT_ABGR8888:
 408         case DRM_FORMAT_ABGR1555:
 409         case DRM_FORMAT_BGR565:
 410                 /* supported, but if AFBC then must be sparse mode */
 411                 return (!afbc) || (afbc && sparse);
 412
 413         case DRM_FORMAT_BGR888:
 414                 /* supported, but not for AFBC */
 415                 return !afbc;
 416
 417         case DRM_FORMAT_YUYV:
 418         case DRM_FORMAT_UYVY:
 419         case DRM_FORMAT_NV12:
 420         case DRM_FORMAT_YUV420:
 421                 /* not supported */
 422                 return false;
 423
 424         default:
 425                 return false;
 426         }
 427 }
 428
 429 /*
 430  * Select the preferred MMU prefetch mode. Full-frame prefetch is preferred as
 431  * long as the framebuffer is all large pages. Otherwise partial-frame prefetch
 432  * is selected as long as it is supported for the current format. The selected
 433  * page size for prefetch is returned in pgsize_bitmap.
 434  */
 435 static enum mmu_prefetch_mode malidp_mmu_prefetch_select_mode
 436                 (struct malidp_plane_state *ms, u32 *pgsize_bitmap)
 437 {
 438         u32 pgsizes;
 439
 440         /* get the full-frame prefetch page size(s) supported by the MMU */
 441         pgsizes = *pgsize_bitmap & MALIDP_MMU_PREFETCH_FULL_PGSIZES;
 442
 443         while (pgsizes) {
 444                 u32 largest_pgsize = 1 << __fls(pgsizes);
 445
 446                 if (malidp_check_pages_threshold(ms, largest_pgsize)) {
 447                         *pgsize_bitmap = largest_pgsize;
 448                         return MALIDP_PREFETCH_MODE_FULL;
 449                 }
 450
 451                 pgsizes -= largest_pgsize;
 452         }
 453
 454         /* get the partial-frame prefetch page size(s) supported by the MMU */
 455         pgsizes = *pgsize_bitmap & MALIDP_MMU_PREFETCH_PARTIAL_PGSIZES;
 456
 457         if (malidp_partial_prefetch_supported(ms->base.fb->format->format,
 458                                               ms->base.fb->modifier,
 459                                               ms->base.rotation)) {
 460                 /* partial prefetch using the smallest page size */
 461                 *pgsize_bitmap = 1 << __ffs(pgsizes);
 462                 return MALIDP_PREFETCH_MODE_PARTIAL;
 463         }
 464         *pgsize_bitmap = 0;
 465         return MALIDP_PREFETCH_MODE_NONE;
 466 }
 467
 468 static u32 malidp_calc_mmu_control_value(enum mmu_prefetch_mode mode,
 469                                          u8 readahead, u8 n_planes, u32 pgsize)
 470 {
 471         u32 mmu_ctrl = 0;
 472
 473         if (mode != MALIDP_PREFETCH_MODE_NONE) {
 474                 mmu_ctrl |= MALIDP_MMU_CTRL_EN;
 475
 476                 if (mode == MALIDP_PREFETCH_MODE_PARTIAL) {
 477                         mmu_ctrl |= MALIDP_MMU_CTRL_MODE;
 478                         mmu_ctrl |= MALIDP_MMU_CTRL_PP_NUM_REQ(readahead);
 479                 }
 480
 481                 if (pgsize == SZ_64K || pgsize == SZ_2M) {
 482                         int i;
 483
 484                         for (i = 0; i < n_planes; i++)
 485                                 mmu_ctrl |= MALIDP_MMU_CTRL_PX_PS(i);
 486                 }
 487         }
 488
 489         return mmu_ctrl;
 490 }
 491
 492 static void malidp_de_prefetch_settings(struct malidp_plane *mp,
 493                                         struct malidp_plane_state *ms)
 494 {
 495         if (!mp->layer->mmu_ctrl_offset)
 496                 return;
 497
 498         /* get the page sizes supported by the MMU */
 499         ms->mmu_prefetch_pgsize = malidp_get_pgsize_bitmap(mp);
 500         ms->mmu_prefetch_mode  =
 501                 malidp_mmu_prefetch_select_mode(ms, &ms->mmu_prefetch_pgsize);
 502 }
 503
 504 static int malidp_de_plane_check(struct drm_plane *plane,
 505                                  struct drm_plane_state *state)
 506 {
 507         struct malidp_plane *mp = to_malidp_plane(plane);
 508         struct malidp_plane_state *ms = to_malidp_plane_state(state);
 509         bool rotated = state->rotation & MALIDP_ROTATED_MASK;
 510         struct drm_framebuffer *fb;
 511         u16 pixel_alpha = state->pixel_blend_mode;
 512         int i, ret;
 513         unsigned int block_w, block_h;
 514
 515         if (!state->crtc || !state->fb)
 516                 return 0;
 517
 518         fb = state->fb;
 519
 520         ms->format = malidp_hw_get_format_id(&mp->hwdev->hw->map,
 521                                              mp->layer->id, fb->format->format,
 522                                              !!fb->modifier);
 523         if (ms->format == MALIDP_INVALID_FORMAT_ID)
 524                 return -EINVAL;
 525
 526         ms->n_planes = fb->format->num_planes;
 527         for (i = 0; i < ms->n_planes; i++) {
 528                 u8 alignment = malidp_hw_get_pitch_align(mp->hwdev, rotated);
 529
 530                 if (((fb->pitches[i] * drm_format_info_block_height(fb->format, i))
 531                                 & (alignment - 1)) && !(fb->modifier)) {
 532                         DRM_DEBUG_KMS("Invalid pitch %u for plane %d\n",
 533                                       fb->pitches[i], i);
 534                         return -EINVAL;
 535                 }
 536         }
 537
 538         block_w = drm_format_info_block_width(fb->format, 0);
 539         block_h = drm_format_info_block_height(fb->format, 0);
 540         if (fb->width % block_w || fb->height % block_h) {
 541                 DRM_DEBUG_KMS("Buffer width/height needs to be a multiple of tile sizes");
 542                 return -EINVAL;
 543         }
 544         if ((state->src_x >> 16) % block_w || (state->src_y >> 16) % block_h) {
 545                 DRM_DEBUG_KMS("Plane src_x/src_y needs to be a multiple of tile sizes");
 546                 return -EINVAL;
 547         }
 548
 549         if ((state->crtc_w > mp->hwdev->max_line_size) ||
 550             (state->crtc_h > mp->hwdev->max_line_size) ||
 551             (state->crtc_w < mp->hwdev->min_line_size) ||
 552             (state->crtc_h < mp->hwdev->min_line_size))
 553                 return -EINVAL;
 554
 555         /*
 556          * DP550/650 video layers can accept 3 plane formats only if
 557          * fb->pitches[1] == fb->pitches[2] since they don't have a
 558          * third plane stride register.
 559          */
 560         if (ms->n_planes == 3 &&
 561             !(mp->hwdev->hw->features & MALIDP_DEVICE_LV_HAS_3_STRIDES) &&
 562             (state->fb->pitches[1] != state->fb->pitches[2]))
 563                 return -EINVAL;
 564
 565         ret = malidp_se_check_scaling(mp, state);
 566         if (ret)
 567                 return ret;
 568
 569         /* validate the rotation constraints for each layer */
 570         if (state->rotation != DRM_MODE_ROTATE_0) {
 571                 if (mp->layer->rot == ROTATE_NONE)
 572                         return -EINVAL;
 573                 if ((mp->layer->rot == ROTATE_COMPRESSED) && !(fb->modifier))
 574                         return -EINVAL;
 575                 /*
 576                  * packed RGB888 / BGR888 can't be rotated or flipped
 577                  * unless they are stored in a compressed way
 578                  */
 579                 if ((fb->format->format == DRM_FORMAT_RGB888 ||
 580                      fb->format->format == DRM_FORMAT_BGR888) && !(fb->modifier))
 581                         return -EINVAL;
 582         }
 583
 584         /* SMART layer does not support AFBC */
 585         if (mp->layer->id == DE_SMART && fb->modifier) {
 586                 DRM_ERROR("AFBC framebuffer not supported in SMART layer");
 587                 return -EINVAL;
 588         }
 589
 590         ms->rotmem_size = 0;
 591         if (state->rotation & MALIDP_ROTATED_MASK) {
 592                 int val;
 593
 594                 val = mp->hwdev->hw->rotmem_required(mp->hwdev, state->crtc_w,
 595                                                      state->crtc_h,
 596                                                      fb->format->format,
 597                                                      !!(fb->modifier));
 598                 if (val < 0)
 599                         return val;
 600
 601                 ms->rotmem_size = val;
 602         }
 603
 604         /* HW can't support plane + pixel blending */
 605         if ((state->alpha != DRM_BLEND_ALPHA_OPAQUE) &&
 606             (pixel_alpha != DRM_MODE_BLEND_PIXEL_NONE) &&
 607             fb->format->has_alpha)
 608                 return -EINVAL;
 609
 610         malidp_de_prefetch_settings(mp, ms);
 611
 612         return 0;
 613 }
 614
 615 static void malidp_de_set_plane_pitches(struct malidp_plane *mp,
 616                                         int num_planes, unsigned int pitches[3])
 617 {
 618         int i;
 619         int num_strides = num_planes;
 620
 621         if (!mp->layer->stride_offset)
 622                 return;
 623
 624         if (num_planes == 3)
 625                 num_strides = (mp->hwdev->hw->features &
 626                                MALIDP_DEVICE_LV_HAS_3_STRIDES) ? 3 : 2;
 627
 628         /*
 629          * The drm convention for pitch is that it needs to cover width * cpp,
 630          * but our hardware wants the pitch/stride to cover all rows included
 631          * in a tile.
 632          */
 633         for (i = 0; i < num_strides; ++i) {
 634                 unsigned int block_h = drm_format_info_block_height(mp->base.state->fb->format, i);
 635
 636                 malidp_hw_write(mp->hwdev, pitches[i] * block_h,
 637                                 mp->layer->base +
 638                                 mp->layer->stride_offset + i * 4);
 639         }
 640 }
 641
 642 static const s16
 643 malidp_yuv2rgb_coeffs[][DRM_COLOR_RANGE_MAX][MALIDP_COLORADJ_NUM_COEFFS] = {
 644         [DRM_COLOR_YCBCR_BT601][DRM_COLOR_YCBCR_LIMITED_RANGE] = {
 645                 1192,    0, 1634,
 646                 1192, -401, -832,
 647                 1192, 2066,    0,
 648                   64,  512,  512
 649         },
 650         [DRM_COLOR_YCBCR_BT601][DRM_COLOR_YCBCR_FULL_RANGE] = {
 651                 1024,    0, 1436,
 652                 1024, -352, -731,
 653                 1024, 1815,    0,
 654                    0,  512,  512
 655         },
 656         [DRM_COLOR_YCBCR_BT709][DRM_COLOR_YCBCR_LIMITED_RANGE] = {
 657                 1192,    0, 1836,
 658                 1192, -218, -546,
 659                 1192, 2163,    0,
 660                   64,  512,  512
 661         },
 662         [DRM_COLOR_YCBCR_BT709][DRM_COLOR_YCBCR_FULL_RANGE] = {
 663                 1024,    0, 1613,
 664                 1024, -192, -479,
 665                 1024, 1900,    0,
 666                    0,  512,  512
 667         },
 668         [DRM_COLOR_YCBCR_BT2020][DRM_COLOR_YCBCR_LIMITED_RANGE] = {
 669                 1024,    0, 1476,
 670                 1024, -165, -572,
 671                 1024, 1884,    0,
 672                    0,  512,  512
 673         },
 674         [DRM_COLOR_YCBCR_BT2020][DRM_COLOR_YCBCR_FULL_RANGE] = {
 675                 1024,    0, 1510,
 676                 1024, -168, -585,
 677                 1024, 1927,    0,
 678                    0,  512,  512
 679         }
 680 };
 681
 682 static void malidp_de_set_color_encoding(struct malidp_plane *plane,
 683                                          enum drm_color_encoding enc,
 684                                          enum drm_color_range range)
 685 {
 686         unsigned int i;
 687
 688         for (i = 0; i < MALIDP_COLORADJ_NUM_COEFFS; i++) {
 689                 /* coefficients are signed, two's complement values */
 690                 malidp_hw_write(plane->hwdev, malidp_yuv2rgb_coeffs[enc][range][i],
 691                                 plane->layer->base + plane->layer->yuv2rgb_offset +
 692                                 i * 4);
 693         }
 694 }
 695
 696 static void malidp_de_set_mmu_control(struct malidp_plane *mp,
 697                                       struct malidp_plane_state *ms)
 698 {
 699         u32 mmu_ctrl;
 700
 701         /* check hardware supports MMU prefetch */
 702         if (!mp->layer->mmu_ctrl_offset)
 703                 return;
 704
 705         mmu_ctrl = malidp_calc_mmu_control_value(ms->mmu_prefetch_mode,
 706                                                  MALIDP_MMU_PREFETCH_READAHEAD,
 707                                                  ms->n_planes,
 708                                                  ms->mmu_prefetch_pgsize);
 709
 710         malidp_hw_write(mp->hwdev, mmu_ctrl,
 711                         mp->layer->base + mp->layer->mmu_ctrl_offset);
 712 }
 713
 714 static void malidp_set_plane_base_addr(struct drm_framebuffer *fb,
 715                                        struct malidp_plane *mp,
 716                                        int plane_index)
 717 {
 718         dma_addr_t paddr;
 719         u16 ptr;
 720         struct drm_plane *plane = &mp->base;
 721         bool afbc = fb->modifier ? true : false;
 722
 723         ptr = mp->layer->ptr + (plane_index << 4);
 724
 725         /*
 726          * drm_fb_cma_get_gem_addr() alters the physical base address of the
 727          * framebuffer as per the plane's src_x, src_y co-ordinates (ie to
 728          * take care of source cropping).
 729          * For AFBC, this is not needed as the cropping is handled by _AD_CROP_H
 730          * and _AD_CROP_V registers.
 731          */
 732         if (!afbc) {
 733                 paddr = drm_fb_cma_get_gem_addr(fb, plane->state,
 734                                                 plane_index);
 735         } else {
 736                 struct drm_gem_cma_object *obj;
 737
 738                 obj = drm_fb_cma_get_gem_obj(fb, plane_index);
 739
 740                 if (WARN_ON(!obj))
 741                         return;
 742                 paddr = obj->paddr;
 743         }
 744
 745         malidp_hw_write(mp->hwdev, lower_32_bits(paddr), ptr);
 746         malidp_hw_write(mp->hwdev, upper_32_bits(paddr), ptr + 4);
 747 }
 748
 749 static void malidp_de_set_plane_afbc(struct drm_plane *plane)
 750 {
 751         struct malidp_plane *mp;
 752         u32 src_w, src_h, val = 0, src_x, src_y;
 753         struct drm_framebuffer *fb = plane->state->fb;
 754
 755         mp = to_malidp_plane(plane);
 756
 757         /* no afbc_decoder_offset means AFBC is not supported on this plane */
 758         if (!mp->layer->afbc_decoder_offset)
 759                 return;
 760
 761         if (!fb->modifier) {
 762                 malidp_hw_write(mp->hwdev, 0, mp->layer->afbc_decoder_offset);
 763                 return;
 764         }
 765
 766         /* convert src values from Q16 fixed point to integer */
 767         src_w = plane->state->src_w >> 16;
 768         src_h = plane->state->src_h >> 16;
 769         src_x = plane->state->src_x >> 16;
 770         src_y = plane->state->src_y >> 16;
 771
 772         val = ((fb->width - (src_x + src_w)) << MALIDP_AD_CROP_RIGHT_OFFSET) |
 773                    src_x;
 774         malidp_hw_write(mp->hwdev, val,
 775                         mp->layer->afbc_decoder_offset + MALIDP_AD_CROP_H);
 776
 777         val = ((fb->height - (src_y + src_h)) << MALIDP_AD_CROP_BOTTOM_OFFSET) |
 778                    src_y;
 779         malidp_hw_write(mp->hwdev, val,
 780                         mp->layer->afbc_decoder_offset + MALIDP_AD_CROP_V);
 781
 782         val = MALIDP_AD_EN;
 783         if (fb->modifier & AFBC_FORMAT_MOD_SPLIT)
 784                 val |= MALIDP_AD_BS;
 785         if (fb->modifier & AFBC_FORMAT_MOD_YTR)
 786                 val |= MALIDP_AD_YTR;
 787
 788         malidp_hw_write(mp->hwdev, val, mp->layer->afbc_decoder_offset);
 789 }
 790
 791 static void malidp_de_plane_update(struct drm_plane *plane,
 792                                    struct drm_plane_state *old_state)
 793 {
 794         struct malidp_plane *mp;
 795         struct malidp_plane_state *ms = to_malidp_plane_state(plane->state);
 796         struct drm_plane_state *state = plane->state;
 797         u16 pixel_alpha = state->pixel_blend_mode;
 798         u8 plane_alpha = state->alpha >> 8;
 799         u32 src_w, src_h, dest_w, dest_h, val;
 800         int i;
 801         struct drm_framebuffer *fb = plane->state->fb;
 802
 803         mp = to_malidp_plane(plane);
 804
 805         /*
 806          * For AFBC framebuffer, use the framebuffer width and height for
 807          * configuring layer input size register.
 808          */
 809         if (fb->modifier) {
 810                 src_w = fb->width;
 811                 src_h = fb->height;
 812         } else {
 813                 /* convert src values from Q16 fixed point to integer */
 814                 src_w = state->src_w >> 16;
 815                 src_h = state->src_h >> 16;
 816         }
 817
 818         dest_w = state->crtc_w;
 819         dest_h = state->crtc_h;
 820
 821         val = malidp_hw_read(mp->hwdev, mp->layer->base);
 822         val = (val & ~LAYER_FORMAT_MASK) | ms->format;
 823         malidp_hw_write(mp->hwdev, val, mp->layer->base);
 824
 825         for (i = 0; i < ms->n_planes; i++)
 826                 malidp_set_plane_base_addr(fb, mp, i);
 827
 828         malidp_de_set_mmu_control(mp, ms);
 829
 830         malidp_de_set_plane_pitches(mp, ms->n_planes,
 831                                     state->fb->pitches);
 832
 833         if ((plane->state->color_encoding != old_state->color_encoding) ||
 834             (plane->state->color_range != old_state->color_range))
 835                 malidp_de_set_color_encoding(mp, plane->state->color_encoding,
 836                                              plane->state->color_range);
 837
 838         malidp_hw_write(mp->hwdev, LAYER_H_VAL(src_w) | LAYER_V_VAL(src_h),
 839                         mp->layer->base + MALIDP_LAYER_SIZE);
 840
 841         malidp_hw_write(mp->hwdev, LAYER_H_VAL(dest_w) | LAYER_V_VAL(dest_h),
 842                         mp->layer->base + MALIDP_LAYER_COMP_SIZE);
 843
 844         malidp_hw_write(mp->hwdev, LAYER_H_VAL(state->crtc_x) |
 845                         LAYER_V_VAL(state->crtc_y),
 846                         mp->layer->base + MALIDP_LAYER_OFFSET);
 847
 848         if (mp->layer->id == DE_SMART) {
 849                 /*
 850                  * Enable the first rectangle in the SMART layer to be
 851                  * able to use it as a drm plane.
 852                  */
 853                 malidp_hw_write(mp->hwdev, 1,
 854                                 mp->layer->base + MALIDP550_LS_ENABLE);
 855                 malidp_hw_write(mp->hwdev,
 856                                 LAYER_H_VAL(src_w) | LAYER_V_VAL(src_h),
 857                                 mp->layer->base + MALIDP550_LS_R1_IN_SIZE);
 858         }
 859
 860         malidp_de_set_plane_afbc(plane);
 861
 862         /* first clear the rotation bits */
 863         val = malidp_hw_read(mp->hwdev, mp->layer->base + MALIDP_LAYER_CONTROL);
 864         val &= ~LAYER_ROT_MASK;
 865
 866         /* setup the rotation and axis flip bits */
 867         if (state->rotation & DRM_MODE_ROTATE_MASK)
 868                 val |= ilog2(plane->state->rotation & DRM_MODE_ROTATE_MASK) <<
 869                        LAYER_ROT_OFFSET;
 870         if (state->rotation & DRM_MODE_REFLECT_X)
 871                 val |= LAYER_H_FLIP;
 872         if (state->rotation & DRM_MODE_REFLECT_Y)
 873                 val |= LAYER_V_FLIP;
 874
 875         val &= ~(LAYER_COMP_MASK | LAYER_PMUL_ENABLE | LAYER_ALPHA(0xff));
 876
 877         if (state->alpha != DRM_BLEND_ALPHA_OPAQUE) {
 878                 val |= LAYER_COMP_PLANE;
 879         } else if (state->fb->format->has_alpha) {
 880                 /* We only care about blend mode if the format has alpha */
 881                 switch (pixel_alpha) {
 882                 case DRM_MODE_BLEND_PREMULTI:
 883                         val |= LAYER_COMP_PIXEL | LAYER_PMUL_ENABLE;
 884                         break;
 885                 case DRM_MODE_BLEND_COVERAGE:
 886                         val |= LAYER_COMP_PIXEL;
 887                         break;
 888                 }
 889         }
 890         val |= LAYER_ALPHA(plane_alpha);
 891
 892         val &= ~LAYER_FLOWCFG(LAYER_FLOWCFG_MASK);
 893         if (state->crtc) {
 894                 struct malidp_crtc_state *m =
 895                         to_malidp_crtc_state(state->crtc->state);
 896
 897                 if (m->scaler_config.scale_enable &&
 898                     m->scaler_config.plane_src_id == mp->layer->id)
 899                         val |= LAYER_FLOWCFG(LAYER_FLOWCFG_SCALE_SE);
 900         }
 901
 902         /* set the 'enable layer' bit */
 903         val |= LAYER_ENABLE;
 904
 905         malidp_hw_write(mp->hwdev, val,
 906                         mp->layer->base + MALIDP_LAYER_CONTROL);
 907 }
 908
 909 static void malidp_de_plane_disable(struct drm_plane *plane,
 910                                     struct drm_plane_state *state)
 911 {
 912         struct malidp_plane *mp = to_malidp_plane(plane);
 913
 914         malidp_hw_clearbits(mp->hwdev,
 915                             LAYER_ENABLE | LAYER_FLOWCFG(LAYER_FLOWCFG_MASK),
 916                             mp->layer->base + MALIDP_LAYER_CONTROL);
 917 }
 918
 919 static const struct drm_plane_helper_funcs malidp_de_plane_helper_funcs = {
 920         .atomic_check = malidp_de_plane_check,
 921         .atomic_update = malidp_de_plane_update,
 922         .atomic_disable = malidp_de_plane_disable,
 923 };
 924
 925 int malidp_de_planes_init(struct drm_device *drm)
 926 {
 927         struct malidp_drm *malidp = drm->dev_private;
 928         const struct malidp_hw_regmap *map = &malidp->dev->hw->map;
 929         struct malidp_plane *plane = NULL;
 930         enum drm_plane_type plane_type;
 931         unsigned long crtcs = 1 << drm->mode_config.num_crtc;
 932         unsigned long flags = DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_180 |
 933                               DRM_MODE_ROTATE_270 | DRM_MODE_REFLECT_X | DRM_MODE_REFLECT_Y;
 934         unsigned int blend_caps = BIT(DRM_MODE_BLEND_PIXEL_NONE) |
 935                                   BIT(DRM_MODE_BLEND_PREMULTI)   |
 936                                   BIT(DRM_MODE_BLEND_COVERAGE);
 937         u32 *formats;
 938         int ret, i = 0, j = 0, n;
 939         u64 supported_modifiers[MODIFIERS_COUNT_MAX];
 940         const u64 *modifiers;
 941
 942         modifiers = malidp_format_modifiers;
 943
 944         if (!(map->features & MALIDP_DEVICE_AFBC_SUPPORT_SPLIT)) {
 945                 /*
 946                  * Since our hardware does not support SPLIT, so build the list
 947                  * of supported modifiers excluding SPLIT ones.
 948                  */
 949                 while (*modifiers != DRM_FORMAT_MOD_INVALID) {
 950                         if (!(*modifiers & AFBC_SPLIT))
 951                                 supported_modifiers[j++] = *modifiers;
 952
 953                         modifiers++;
 954                 }
 955                 supported_modifiers[j++] = DRM_FORMAT_MOD_INVALID;
 956                 modifiers = supported_modifiers;
 957         }
 958
 959         formats = kcalloc(map->n_pixel_formats, sizeof(*formats), GFP_KERNEL);
 960         if (!formats) {
 961                 ret = -ENOMEM;
 962                 goto cleanup;
 963         }
 964
 965         for (i = 0; i < map->n_layers; i++) {
 966                 u8 id = map->layers[i].id;
 967
 968                 plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 969                 if (!plane) {
 970                         ret = -ENOMEM;
 971                         goto cleanup;
 972                 }
 973
 974                 /* build the list of DRM supported formats based on the map */
 975                 for (n = 0, j = 0;  j < map->n_pixel_formats; j++) {
 976                         if ((map->pixel_formats[j].layer & id) == id)
 977                                 formats[n++] = map->pixel_formats[j].format;
 978                 }
 979
 980                 plane_type = (i == 0) ? DRM_PLANE_TYPE_PRIMARY :
 981                                         DRM_PLANE_TYPE_OVERLAY;
 982
 983                 /*
 984                  * All the layers except smart layer supports AFBC modifiers.
 985                  */
 986                 ret = drm_universal_plane_init(drm, &plane->base, crtcs,
 987                                 &malidp_de_plane_funcs, formats, n,
 988                                 (id == DE_SMART) ? NULL : modifiers, plane_type,
 989                                 NULL);
 990
 991                 if (ret < 0)
 992                         goto cleanup;
 993
 994                 drm_plane_helper_add(&plane->base,
 995                                      &malidp_de_plane_helper_funcs);
 996                 plane->hwdev = malidp->dev;
 997                 plane->layer = &map->layers[i];
 998
 999                 drm_plane_create_alpha_property(&plane->base);
1000                 drm_plane_create_blend_mode_property(&plane->base, blend_caps);
1001
1002                 if (id == DE_SMART) {
1003                         /* Skip the features which the SMART layer doesn't have. */
1004                         continue;
1005                 }
1006
1007                 drm_plane_create_rotation_property(&plane->base, DRM_MODE_ROTATE_0, flags);
1008                 malidp_hw_write(malidp->dev, MALIDP_ALPHA_LUT,
1009                                 plane->layer->base + MALIDP_LAYER_COMPOSE);
1010
1011                 /* Attach the YUV->RGB property only to video layers */
1012                 if (id & (DE_VIDEO1 | DE_VIDEO2)) {
1013                         /* default encoding for YUV->RGB is BT601 NARROW */
1014                         enum drm_color_encoding enc = DRM_COLOR_YCBCR_BT601;
1015                         enum drm_color_range range = DRM_COLOR_YCBCR_LIMITED_RANGE;
1016
1017                         ret = drm_plane_create_color_properties(&plane->base,
1018                                         BIT(DRM_COLOR_YCBCR_BT601) | \
1019                                         BIT(DRM_COLOR_YCBCR_BT709) | \
1020                                         BIT(DRM_COLOR_YCBCR_BT2020),
1021                                         BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) | \
1022                                         BIT(DRM_COLOR_YCBCR_FULL_RANGE),
1023                                         enc, range);
1024                         if (!ret)
1025                                 /* program the HW registers */
1026                                 malidp_de_set_color_encoding(plane, enc, range);
1027                         else
1028                                 DRM_WARN("Failed to create video layer %d color properties\n", id);
1029                 }
1030         }
1031
1032         kfree(formats);
1033
1034         return 0;
1035
1036 cleanup:
1037         kfree(formats);
1038
1039         return ret;
1040 }