drivers/gpu/drm/rcar-du/rcar_du_plane.c

   1 /*
   2  * rcar_du_plane.c  --  R-Car Display Unit Planes
   3  *
   4  * Copyright (C) 2013-2015 Renesas Electronics Corporation
   5  *
   6  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <drm/drmP.h>
  15 #include <drm/drm_atomic.h>
  16 #include <drm/drm_atomic_helper.h>
  17 #include <drm/drm_crtc.h>
  18 #include <drm/drm_crtc_helper.h>
  19 #include <drm/drm_fb_cma_helper.h>
  20 #include <drm/drm_gem_cma_helper.h>
  21 #include <drm/drm_plane_helper.h>
  22
  23 #include "rcar_du_drv.h"
  24 #include "rcar_du_group.h"
  25 #include "rcar_du_kms.h"
  26 #include "rcar_du_plane.h"
  27 #include "rcar_du_regs.h"
  28
  29 /* -----------------------------------------------------------------------------
  30  * Atomic hardware plane allocator
  31  *
  32  * The hardware plane allocator is solely based on the atomic plane states
  33  * without keeping any external state to avoid races between .atomic_check()
  34  * and .atomic_commit().
  35  *
  36  * The core idea is to avoid using a free planes bitmask that would need to be
  37  * shared between check and commit handlers with a collective knowledge based on
  38  * the allocated hardware plane(s) for each KMS plane. The allocator then loops
  39  * over all plane states to compute the free planes bitmask, allocates hardware
  40  * planes based on that bitmask, and stores the result back in the plane states.
  41  *
  42  * For this to work we need to access the current state of planes not touched by
  43  * the atomic update. To ensure that it won't be modified, we need to lock all
  44  * planes using drm_atomic_get_plane_state(). This effectively serializes atomic
  45  * updates from .atomic_check() up to completion (when swapping the states if
  46  * the check step has succeeded) or rollback (when freeing the states if the
  47  * check step has failed).
  48  *
  49  * Allocation is performed in the .atomic_check() handler and applied
  50  * automatically when the core swaps the old and new states.
  51  */
  52
  53 static bool rcar_du_plane_needs_realloc(struct rcar_du_plane *plane,
  54                                         struct rcar_du_plane_state *new_state)
  55 {
  56         struct rcar_du_plane_state *cur_state;
  57
  58         cur_state = to_rcar_plane_state(plane->plane.state);
  59
  60         /* Lowering the number of planes doesn't strictly require reallocation
  61          * as the extra hardware plane will be freed when committing, but doing
  62          * so could lead to more fragmentation.
  63          */
  64         if (!cur_state->format ||
  65             cur_state->format->planes != new_state->format->planes)
  66                 return true;
  67
  68         /* Reallocate hardware planes if the source has changed. */
  69         if (cur_state->source != new_state->source)
  70                 return true;
  71
  72         return false;
  73 }
  74
  75 static unsigned int rcar_du_plane_hwmask(struct rcar_du_plane_state *state)
  76 {
  77         unsigned int mask;
  78
  79         if (state->hwindex == -1)
  80                 return 0;
  81
  82         mask = 1 << state->hwindex;
  83         if (state->format->planes == 2)
  84                 mask |= 1 << ((state->hwindex + 1) % 8);
  85
  86         return mask;
  87 }
  88
  89 /*
  90  * The R8A7790 DU can source frames directly from the VSP1 devices VSPD0 and
  91  * VSPD1. VSPD0 feeds DU0/1 plane 0, and VSPD1 feeds either DU2 plane 0 or
  92  * DU0/1 plane 1.
  93  *
  94  * Allocate the correct fixed plane when sourcing frames from VSPD0 or VSPD1,
  95  * and allocate planes in reverse index order otherwise to ensure maximum
  96  * availability of planes 0 and 1.
  97  *
  98  * The caller is responsible for ensuring that the requested source is
  99  * compatible with the DU revision.
 100  */
 101 static int rcar_du_plane_hwalloc(struct rcar_du_plane *plane,
 102                                  struct rcar_du_plane_state *state,
 103                                  unsigned int free)
 104 {
 105         unsigned int num_planes = state->format->planes;
 106         int fixed = -1;
 107         int i;
 108
 109         if (state->source == RCAR_DU_PLANE_VSPD0) {
 110                 /* VSPD0 feeds plane 0 on DU0/1. */
 111                 if (plane->group->index != 0)
 112                         return -EINVAL;
 113
 114                 fixed = 0;
 115         } else if (state->source == RCAR_DU_PLANE_VSPD1) {
 116                 /* VSPD1 feeds plane 1 on DU0/1 or plane 0 on DU2. */
 117                 fixed = plane->group->index == 0 ? 1 : 0;
 118         }
 119
 120         if (fixed >= 0)
 121                 return free & (1 << fixed) ? fixed : -EBUSY;
 122
 123         for (i = RCAR_DU_NUM_HW_PLANES - 1; i >= 0; --i) {
 124                 if (!(free & (1 << i)))
 125                         continue;
 126
 127                 if (num_planes == 1 || free & (1 << ((i + 1) % 8)))
 128                         break;
 129         }
 130
 131         return i < 0 ? -EBUSY : i;
 132 }
 133
 134 int rcar_du_atomic_check_planes(struct drm_device *dev,
 135                                 struct drm_atomic_state *state)
 136 {
 137         struct rcar_du_device *rcdu = dev->dev_private;
 138         unsigned int group_freed_planes[RCAR_DU_MAX_GROUPS] = { 0, };
 139         unsigned int group_free_planes[RCAR_DU_MAX_GROUPS] = { 0, };
 140         bool needs_realloc = false;
 141         unsigned int groups = 0;
 142         unsigned int i;
 143         struct drm_plane *drm_plane;
 144         struct drm_plane_state *drm_plane_state;
 145
 146         /* Check if hardware planes need to be reallocated. */
 147         for_each_plane_in_state(state, drm_plane, drm_plane_state, i) {
 148                 struct rcar_du_plane_state *plane_state;
 149                 struct rcar_du_plane *plane;
 150                 unsigned int index;
 151
 152                 plane = to_rcar_plane(drm_plane);
 153                 plane_state = to_rcar_plane_state(drm_plane_state);
 154
 155                 dev_dbg(rcdu->dev, "%s: checking plane (%u,%tu)\n", __func__,
 156                         plane->group->index, plane - plane->group->planes);
 157
 158                 /* If the plane is being disabled we don't need to go through
 159                  * the full reallocation procedure. Just mark the hardware
 160                  * plane(s) as freed.
 161                  */
 162                 if (!plane_state->format) {
 163                         dev_dbg(rcdu->dev, "%s: plane is being disabled\n",
 164                                 __func__);
 165                         index = plane - plane->group->planes;
 166                         group_freed_planes[plane->group->index] |= 1 << index;
 167                         plane_state->hwindex = -1;
 168                         continue;
 169                 }
 170
 171                 /* If the plane needs to be reallocated mark it as such, and
 172                  * mark the hardware plane(s) as free.
 173                  */
 174                 if (rcar_du_plane_needs_realloc(plane, plane_state)) {
 175                         dev_dbg(rcdu->dev, "%s: plane needs reallocation\n",
 176                                 __func__);
 177                         groups |= 1 << plane->group->index;
 178                         needs_realloc = true;
 179
 180                         index = plane - plane->group->planes;
 181                         group_freed_planes[plane->group->index] |= 1 << index;
 182                         plane_state->hwindex = -1;
 183                 }
 184         }
 185
 186         if (!needs_realloc)
 187                 return 0;
 188
 189         /* Grab all plane states for the groups that need reallocation to ensure
 190          * locking and avoid racy updates. This serializes the update operation,
 191          * but there's not much we can do about it as that's the hardware
 192          * design.
 193          *
 194          * Compute the used planes mask for each group at the same time to avoid
 195          * looping over the planes separately later.
 196          */
 197         while (groups) {
 198                 unsigned int index = ffs(groups) - 1;
 199                 struct rcar_du_group *group = &rcdu->groups[index];
 200                 unsigned int used_planes = 0;
 201
 202                 dev_dbg(rcdu->dev, "%s: finding free planes for group %u\n",
 203                         __func__, index);
 204
 205                 for (i = 0; i < group->num_planes; ++i) {
 206                         struct rcar_du_plane *plane = &group->planes[i];
 207                         struct rcar_du_plane_state *plane_state;
 208                         struct drm_plane_state *s;
 209
 210                         s = drm_atomic_get_plane_state(state, &plane->plane);
 211                         if (IS_ERR(s))
 212                                 return PTR_ERR(s);
 213
 214                         /* If the plane has been freed in the above loop its
 215                          * hardware planes must not be added to the used planes
 216                          * bitmask. However, the current state doesn't reflect
 217                          * the free state yet, as we've modified the new state
 218                          * above. Use the local freed planes list to check for
 219                          * that condition instead.
 220                          */
 221                         if (group_freed_planes[index] & (1 << i)) {
 222                                 dev_dbg(rcdu->dev,
 223                                         "%s: plane (%u,%tu) has been freed, skipping\n",
 224                                         __func__, plane->group->index,
 225                                         plane - plane->group->planes);
 226                                 continue;
 227                         }
 228
 229                         plane_state = to_rcar_plane_state(plane->plane.state);
 230                         used_planes |= rcar_du_plane_hwmask(plane_state);
 231
 232                         dev_dbg(rcdu->dev,
 233                                 "%s: plane (%u,%tu) uses %u hwplanes (index %d)\n",
 234                                 __func__, plane->group->index,
 235                                 plane - plane->group->planes,
 236                                 plane_state->format ?
 237                                 plane_state->format->planes : 0,
 238                                 plane_state->hwindex);
 239                 }
 240
 241                 group_free_planes[index] = 0xff & ~used_planes;
 242                 groups &= ~(1 << index);
 243
 244                 dev_dbg(rcdu->dev, "%s: group %u free planes mask 0x%02x\n",
 245                         __func__, index, group_free_planes[index]);
 246         }
 247
 248         /* Reallocate hardware planes for each plane that needs it. */
 249         for_each_plane_in_state(state, drm_plane, drm_plane_state, i) {
 250                 struct rcar_du_plane_state *plane_state;
 251                 struct rcar_du_plane *plane;
 252                 unsigned int crtc_planes;
 253                 unsigned int free;
 254                 int idx;
 255
 256                 plane = to_rcar_plane(drm_plane);
 257                 plane_state = to_rcar_plane_state(drm_plane_state);
 258
 259                 dev_dbg(rcdu->dev, "%s: allocating plane (%u,%tu)\n", __func__,
 260                         plane->group->index, plane - plane->group->planes);
 261
 262                 /* Skip planes that are being disabled or don't need to be
 263                  * reallocated.
 264                  */
 265                 if (!plane_state->format ||
 266                     !rcar_du_plane_needs_realloc(plane, plane_state))
 267                         continue;
 268
 269                 /* Try to allocate the plane from the free planes currently
 270                  * associated with the target CRTC to avoid restarting the CRTC
 271                  * group and thus minimize flicker. If it fails fall back to
 272                  * allocating from all free planes.
 273                  */
 274                 crtc_planes = to_rcar_crtc(plane_state->state.crtc)->index % 2
 275                             ? plane->group->dptsr_planes
 276                             : ~plane->group->dptsr_planes;
 277                 free = group_free_planes[plane->group->index];
 278
 279                 idx = rcar_du_plane_hwalloc(plane, plane_state,
 280                                             free & crtc_planes);
 281                 if (idx < 0)
 282                         idx = rcar_du_plane_hwalloc(plane, plane_state,
 283                                                     free);
 284                 if (idx < 0) {
 285                         dev_dbg(rcdu->dev, "%s: no available hardware plane\n",
 286                                 __func__);
 287                         return idx;
 288                 }
 289
 290                 dev_dbg(rcdu->dev, "%s: allocated %u hwplanes (index %u)\n",
 291                         __func__, plane_state->format->planes, idx);
 292
 293                 plane_state->hwindex = idx;
 294
 295                 group_free_planes[plane->group->index] &=
 296                         ~rcar_du_plane_hwmask(plane_state);
 297
 298                 dev_dbg(rcdu->dev, "%s: group %u free planes mask 0x%02x\n",
 299                         __func__, plane->group->index,
 300                         group_free_planes[plane->group->index]);
 301         }
 302
 303         return 0;
 304 }
 305
 306 /* -----------------------------------------------------------------------------
 307  * Plane Setup
 308  */
 309
 310 #define RCAR_DU_COLORKEY_NONE           (0 << 24)
 311 #define RCAR_DU_COLORKEY_SOURCE         (1 << 24)
 312 #define RCAR_DU_COLORKEY_MASK           (1 << 24)
 313
 314 static void rcar_du_plane_write(struct rcar_du_group *rgrp,
 315                                 unsigned int index, u32 reg, u32 data)
 316 {
 317         rcar_du_write(rgrp->dev, rgrp->mmio_offset + index * PLANE_OFF + reg,
 318                       data);
 319 }
 320
 321 static void rcar_du_plane_setup_scanout(struct rcar_du_group *rgrp,
 322                                         const struct rcar_du_plane_state *state)
 323 {
 324         unsigned int src_x = state->state.src_x >> 16;
 325         unsigned int src_y = state->state.src_y >> 16;
 326         unsigned int index = state->hwindex;
 327         unsigned int pitch;
 328         bool interlaced;
 329         u32 dma[2];
 330
 331         interlaced = state->state.crtc->state->adjusted_mode.flags
 332                    & DRM_MODE_FLAG_INTERLACE;
 333
 334         if (state->source == RCAR_DU_PLANE_MEMORY) {
 335                 struct drm_framebuffer *fb = state->state.fb;
 336                 struct drm_gem_cma_object *gem;
 337                 unsigned int i;
 338
 339                 if (state->format->planes == 2)
 340                         pitch = fb->pitches[0];
 341                 else
 342                         pitch = fb->pitches[0] * 8 / state->format->bpp;
 343
 344                 for (i = 0; i < state->format->planes; ++i) {
 345                         gem = drm_fb_cma_get_gem_obj(fb, i);
 346                         dma[i] = gem->paddr + fb->offsets[i];
 347                 }
 348         } else {
 349                 pitch = state->state.src_w >> 16;
 350                 dma[0] = 0;
 351                 dma[1] = 0;
 352         }
 353
 354         /* Memory pitch (expressed in pixels). Must be doubled for interlaced
 355          * operation with 32bpp formats.
 356          */
 357         rcar_du_plane_write(rgrp, index, PnMWR,
 358                             (interlaced && state->format->bpp == 32) ?
 359                             pitch * 2 : pitch);
 360
 361         /* The Y position is expressed in raster line units and must be doubled
 362          * for 32bpp formats, according to the R8A7790 datasheet. No mention of
 363          * doubling the Y position is found in the R8A7779 datasheet, but the
 364          * rule seems to apply there as well.
 365          *
 366          * Despite not being documented, doubling seem not to be needed when
 367          * operating in interlaced mode.
 368          *
 369          * Similarly, for the second plane, NV12 and NV21 formats seem to
 370          * require a halved Y position value, in both progressive and interlaced
 371          * modes.
 372          */
 373         rcar_du_plane_write(rgrp, index, PnSPXR, src_x);
 374         rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
 375                             (!interlaced && state->format->bpp == 32 ? 2 : 1));
 376
 377         rcar_du_plane_write(rgrp, index, PnDSA0R, dma[0]);
 378
 379         if (state->format->planes == 2) {
 380                 index = (index + 1) % 8;
 381
 382                 rcar_du_plane_write(rgrp, index, PnMWR, pitch);
 383
 384                 rcar_du_plane_write(rgrp, index, PnSPXR, src_x);
 385                 rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
 386                                     (state->format->bpp == 16 ? 2 : 1) / 2);
 387
 388                 rcar_du_plane_write(rgrp, index, PnDSA0R, dma[1]);
 389         }
 390 }
 391
 392 static void rcar_du_plane_setup_mode(struct rcar_du_group *rgrp,
 393                                      unsigned int index,
 394                                      const struct rcar_du_plane_state *state)
 395 {
 396         u32 colorkey;
 397         u32 pnmr;
 398
 399         /* The PnALPHAR register controls alpha-blending in 16bpp formats
 400          * (ARGB1555 and XRGB1555).
 401          *
 402          * For ARGB, set the alpha value to 0, and enable alpha-blending when
 403          * the A bit is 0. This maps A=0 to alpha=0 and A=1 to alpha=255.
 404          *
 405          * For XRGB, set the alpha value to the plane-wide alpha value and
 406          * enable alpha-blending regardless of the X bit value.
 407          */
 408         if (state->format->fourcc != DRM_FORMAT_XRGB1555)
 409                 rcar_du_plane_write(rgrp, index, PnALPHAR, PnALPHAR_ABIT_0);
 410         else
 411                 rcar_du_plane_write(rgrp, index, PnALPHAR,
 412                                     PnALPHAR_ABIT_X | state->alpha);
 413
 414         pnmr = PnMR_BM_MD | state->format->pnmr;
 415
 416         /* Disable color keying when requested. YUV formats have the
 417          * PnMR_SPIM_TP_OFF bit set in their pnmr field, disabling color keying
 418          * automatically.
 419          */
 420         if ((state->colorkey & RCAR_DU_COLORKEY_MASK) == RCAR_DU_COLORKEY_NONE)
 421                 pnmr |= PnMR_SPIM_TP_OFF;
 422
 423         /* For packed YUV formats we need to select the U/V order. */
 424         if (state->format->fourcc == DRM_FORMAT_YUYV)
 425                 pnmr |= PnMR_YCDF_YUYV;
 426
 427         rcar_du_plane_write(rgrp, index, PnMR, pnmr);
 428
 429         switch (state->format->fourcc) {
 430         case DRM_FORMAT_RGB565:
 431                 colorkey = ((state->colorkey & 0xf80000) >> 8)
 432                          | ((state->colorkey & 0x00fc00) >> 5)
 433                          | ((state->colorkey & 0x0000f8) >> 3);
 434                 rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
 435                 break;
 436
 437         case DRM_FORMAT_ARGB1555:
 438         case DRM_FORMAT_XRGB1555:
 439                 colorkey = ((state->colorkey & 0xf80000) >> 9)
 440                          | ((state->colorkey & 0x00f800) >> 6)
 441                          | ((state->colorkey & 0x0000f8) >> 3);
 442                 rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
 443                 break;
 444
 445         case DRM_FORMAT_XRGB8888:
 446         case DRM_FORMAT_ARGB8888:
 447                 rcar_du_plane_write(rgrp, index, PnTC3R,
 448                                     PnTC3R_CODE | (state->colorkey & 0xffffff));
 449                 break;
 450         }
 451 }
 452
 453 static void rcar_du_plane_setup_format_gen2(struct rcar_du_group *rgrp,
 454                                             unsigned int index,
 455                                             const struct rcar_du_plane_state *state)
 456 {
 457         u32 ddcr2 = PnDDCR2_CODE;
 458         u32 ddcr4;
 459
 460         /* Data format
 461          *
 462          * The data format is selected by the DDDF field in PnMR and the EDF
 463          * field in DDCR4.
 464          */
 465
 466         rcar_du_plane_setup_mode(rgrp, index, state);
 467
 468         if (state->format->planes == 2) {
 469                 if (state->hwindex != index) {
 470                         if (state->format->fourcc == DRM_FORMAT_NV12 ||
 471                             state->format->fourcc == DRM_FORMAT_NV21)
 472                                 ddcr2 |= PnDDCR2_Y420;
 473
 474                         if (state->format->fourcc == DRM_FORMAT_NV21)
 475                                 ddcr2 |= PnDDCR2_NV21;
 476
 477                         ddcr2 |= PnDDCR2_DIVU;
 478                 } else {
 479                         ddcr2 |= PnDDCR2_DIVY;
 480                 }
 481         }
 482
 483         rcar_du_plane_write(rgrp, index, PnDDCR2, ddcr2);
 484
 485         ddcr4 = state->format->edf | PnDDCR4_CODE;
 486         if (state->source != RCAR_DU_PLANE_MEMORY)
 487                 ddcr4 |= PnDDCR4_VSPS;
 488
 489         rcar_du_plane_write(rgrp, index, PnDDCR4, ddcr4);
 490 }
 491
 492 static void rcar_du_plane_setup_format_gen3(struct rcar_du_group *rgrp,
 493                                             unsigned int index,
 494                                             const struct rcar_du_plane_state *state)
 495 {
 496         rcar_du_plane_write(rgrp, index, PnMR,
 497                             PnMR_SPIM_TP_OFF | state->format->pnmr);
 498
 499         rcar_du_plane_write(rgrp, index, PnDDCR4,
 500                             state->format->edf | PnDDCR4_CODE);
 501 }
 502
 503 static void rcar_du_plane_setup_format(struct rcar_du_group *rgrp,
 504                                        unsigned int index,
 505                                        const struct rcar_du_plane_state *state)
 506 {
 507         struct rcar_du_device *rcdu = rgrp->dev;
 508
 509         if (rcdu->info->gen < 3)
 510                 rcar_du_plane_setup_format_gen2(rgrp, index, state);
 511         else
 512                 rcar_du_plane_setup_format_gen3(rgrp, index, state);
 513
 514         /* Destination position and size */
 515         rcar_du_plane_write(rgrp, index, PnDSXR, state->state.crtc_w);
 516         rcar_du_plane_write(rgrp, index, PnDSYR, state->state.crtc_h);
 517         rcar_du_plane_write(rgrp, index, PnDPXR, state->state.crtc_x);
 518         rcar_du_plane_write(rgrp, index, PnDPYR, state->state.crtc_y);
 519
 520         if (rcdu->info->gen < 3) {
 521                 /* Wrap-around and blinking, disabled */
 522                 rcar_du_plane_write(rgrp, index, PnWASPR, 0);
 523                 rcar_du_plane_write(rgrp, index, PnWAMWR, 4095);
 524                 rcar_du_plane_write(rgrp, index, PnBTR, 0);
 525                 rcar_du_plane_write(rgrp, index, PnMLR, 0);
 526         }
 527 }
 528
 529 void __rcar_du_plane_setup(struct rcar_du_group *rgrp,
 530                            const struct rcar_du_plane_state *state)
 531 {
 532         struct rcar_du_device *rcdu = rgrp->dev;
 533
 534         rcar_du_plane_setup_format(rgrp, state->hwindex, state);
 535         if (state->format->planes == 2)
 536                 rcar_du_plane_setup_format(rgrp, (state->hwindex + 1) % 8,
 537                                            state);
 538
 539         if (rcdu->info->gen < 3)
 540                 rcar_du_plane_setup_scanout(rgrp, state);
 541
 542         if (state->source == RCAR_DU_PLANE_VSPD1) {
 543                 unsigned int vspd1_sink = rgrp->index ? 2 : 0;
 544
 545                 if (rcdu->vspd1_sink != vspd1_sink) {
 546                         rcdu->vspd1_sink = vspd1_sink;
 547                         rcar_du_set_dpad0_vsp1_routing(rcdu);
 548                 }
 549         }
 550 }
 551
 552 static int rcar_du_plane_atomic_check(struct drm_plane *plane,
 553                                       struct drm_plane_state *state)
 554 {
 555         struct rcar_du_plane_state *rstate = to_rcar_plane_state(state);
 556         struct rcar_du_plane *rplane = to_rcar_plane(plane);
 557         struct rcar_du_device *rcdu = rplane->group->dev;
 558
 559         if (!state->fb || !state->crtc) {
 560                 rstate->format = NULL;
 561                 return 0;
 562         }
 563
 564         if (state->src_w >> 16 != state->crtc_w ||
 565             state->src_h >> 16 != state->crtc_h) {
 566                 dev_dbg(rcdu->dev, "%s: scaling not supported\n", __func__);
 567                 return -EINVAL;
 568         }
 569
 570         rstate->format = rcar_du_format_info(state->fb->pixel_format);
 571         if (rstate->format == NULL) {
 572                 dev_dbg(rcdu->dev, "%s: unsupported format %08x\n", __func__,
 573                         state->fb->pixel_format);
 574                 return -EINVAL;
 575         }
 576
 577         return 0;
 578 }
 579
 580 static void rcar_du_plane_atomic_update(struct drm_plane *plane,
 581                                         struct drm_plane_state *old_state)
 582 {
 583         struct rcar_du_plane *rplane = to_rcar_plane(plane);
 584         struct rcar_du_plane_state *old_rstate;
 585         struct rcar_du_plane_state *new_rstate;
 586
 587         if (!plane->state->crtc)
 588                 return;
 589
 590         rcar_du_plane_setup(rplane);
 591
 592         /* Check whether the source has changed from memory to live source or
 593          * from live source to memory. The source has been configured by the
 594          * VSPS bit in the PnDDCR4 register. Although the datasheet states that
 595          * the bit is updated during vertical blanking, it seems that updates
 596          * only occur when the DU group is held in reset through the DSYSR.DRES
 597          * bit. We thus need to restart the group if the source changes.
 598          */
 599         old_rstate = to_rcar_plane_state(old_state);
 600         new_rstate = to_rcar_plane_state(plane->state);
 601
 602         if ((old_rstate->source == RCAR_DU_PLANE_MEMORY) !=
 603             (new_rstate->source == RCAR_DU_PLANE_MEMORY))
 604                 rplane->group->need_restart = true;
 605 }
 606
 607 static const struct drm_plane_helper_funcs rcar_du_plane_helper_funcs = {
 608         .atomic_check = rcar_du_plane_atomic_check,
 609         .atomic_update = rcar_du_plane_atomic_update,
 610 };
 611
 612 static struct drm_plane_state *
 613 rcar_du_plane_atomic_duplicate_state(struct drm_plane *plane)
 614 {
 615         struct rcar_du_plane_state *state;
 616         struct rcar_du_plane_state *copy;
 617
 618         if (WARN_ON(!plane->state))
 619                 return NULL;
 620
 621         state = to_rcar_plane_state(plane->state);
 622         copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
 623         if (copy == NULL)
 624                 return NULL;
 625
 626         __drm_atomic_helper_plane_duplicate_state(plane, &copy->state);
 627
 628         return &copy->state;
 629 }
 630
 631 static void rcar_du_plane_atomic_destroy_state(struct drm_plane *plane,
 632                                                struct drm_plane_state *state)
 633 {
 634         __drm_atomic_helper_plane_destroy_state(state);
 635         kfree(to_rcar_plane_state(state));
 636 }
 637
 638 static void rcar_du_plane_reset(struct drm_plane *plane)
 639 {
 640         struct rcar_du_plane_state *state;
 641
 642         if (plane->state) {
 643                 rcar_du_plane_atomic_destroy_state(plane, plane->state);
 644                 plane->state = NULL;
 645         }
 646
 647         state = kzalloc(sizeof(*state), GFP_KERNEL);
 648         if (state == NULL)
 649                 return;
 650
 651         state->hwindex = -1;
 652         state->source = RCAR_DU_PLANE_MEMORY;
 653         state->alpha = 255;
 654         state->colorkey = RCAR_DU_COLORKEY_NONE;
 655         state->state.zpos = plane->type == DRM_PLANE_TYPE_PRIMARY ? 0 : 1;
 656
 657         plane->state = &state->state;
 658         plane->state->plane = plane;
 659 }
 660
 661 static int rcar_du_plane_atomic_set_property(struct drm_plane *plane,
 662                                              struct drm_plane_state *state,
 663                                              struct drm_property *property,
 664                                              uint64_t val)
 665 {
 666         struct rcar_du_plane_state *rstate = to_rcar_plane_state(state);
 667         struct rcar_du_device *rcdu = to_rcar_plane(plane)->group->dev;
 668
 669         if (property == rcdu->props.alpha)
 670                 rstate->alpha = val;
 671         else if (property == rcdu->props.colorkey)
 672                 rstate->colorkey = val;
 673         else
 674                 return -EINVAL;
 675
 676         return 0;
 677 }
 678
 679 static int rcar_du_plane_atomic_get_property(struct drm_plane *plane,
 680         const struct drm_plane_state *state, struct drm_property *property,
 681         uint64_t *val)
 682 {
 683         const struct rcar_du_plane_state *rstate =
 684                 container_of(state, const struct rcar_du_plane_state, state);
 685         struct rcar_du_device *rcdu = to_rcar_plane(plane)->group->dev;
 686
 687         if (property == rcdu->props.alpha)
 688                 *val = rstate->alpha;
 689         else if (property == rcdu->props.colorkey)
 690                 *val = rstate->colorkey;
 691         else
 692                 return -EINVAL;
 693
 694         return 0;
 695 }
 696
 697 static const struct drm_plane_funcs rcar_du_plane_funcs = {
 698         .update_plane = drm_atomic_helper_update_plane,
 699         .disable_plane = drm_atomic_helper_disable_plane,
 700         .reset = rcar_du_plane_reset,
 701         .set_property = drm_atomic_helper_plane_set_property,
 702         .destroy = drm_plane_cleanup,
 703         .atomic_duplicate_state = rcar_du_plane_atomic_duplicate_state,
 704         .atomic_destroy_state = rcar_du_plane_atomic_destroy_state,
 705         .atomic_set_property = rcar_du_plane_atomic_set_property,
 706         .atomic_get_property = rcar_du_plane_atomic_get_property,
 707 };
 708
 709 static const uint32_t formats[] = {
 710         DRM_FORMAT_RGB565,
 711         DRM_FORMAT_ARGB1555,
 712         DRM_FORMAT_XRGB1555,
 713         DRM_FORMAT_XRGB8888,
 714         DRM_FORMAT_ARGB8888,
 715         DRM_FORMAT_UYVY,
 716         DRM_FORMAT_YUYV,
 717         DRM_FORMAT_NV12,
 718         DRM_FORMAT_NV21,
 719         DRM_FORMAT_NV16,
 720 };
 721
 722 int rcar_du_planes_init(struct rcar_du_group *rgrp)
 723 {
 724         struct rcar_du_device *rcdu = rgrp->dev;
 725         unsigned int crtcs;
 726         unsigned int i;
 727         int ret;
 728
 729          /* Create one primary plane per CRTC in this group and seven overlay
 730           * planes.
 731           */
 732         rgrp->num_planes = rgrp->num_crtcs + 7;
 733
 734         crtcs = ((1 << rcdu->num_crtcs) - 1) & (3 << (2 * rgrp->index));
 735
 736         for (i = 0; i < rgrp->num_planes; ++i) {
 737                 enum drm_plane_type type = i < rgrp->num_crtcs
 738                                          ? DRM_PLANE_TYPE_PRIMARY
 739                                          : DRM_PLANE_TYPE_OVERLAY;
 740                 struct rcar_du_plane *plane = &rgrp->planes[i];
 741
 742                 plane->group = rgrp;
 743
 744                 ret = drm_universal_plane_init(rcdu->ddev, &plane->plane, crtcs,
 745                                                &rcar_du_plane_funcs, formats,
 746                                                ARRAY_SIZE(formats), type,
 747                                                NULL);
 748                 if (ret < 0)
 749                         return ret;
 750
 751                 drm_plane_helper_add(&plane->plane,
 752                                      &rcar_du_plane_helper_funcs);
 753
 754                 if (type == DRM_PLANE_TYPE_PRIMARY)
 755                         continue;
 756
 757                 drm_object_attach_property(&plane->plane.base,
 758                                            rcdu->props.alpha, 255);
 759                 drm_object_attach_property(&plane->plane.base,
 760                                            rcdu->props.colorkey,
 761                                            RCAR_DU_COLORKEY_NONE);
 762                 drm_plane_create_zpos_property(&plane->plane, 1, 1, 7);
 763         }
 764
 765         return 0;
 766 }