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
 144         /* Check if hardware planes need to be reallocated. */
 145         for (i = 0; i < dev->mode_config.num_total_plane; ++i) {
 146                 struct rcar_du_plane_state *plane_state;
 147                 struct rcar_du_plane *plane;
 148                 unsigned int index;
 149
 150                 if (!state->planes[i])
 151                         continue;
 152
 153                 plane = to_rcar_plane(state->planes[i]);
 154                 plane_state = to_rcar_plane_state(state->plane_states[i]);
 155
 156                 dev_dbg(rcdu->dev, "%s: checking plane (%u,%tu)\n", __func__,
 157                         plane->group->index, plane - plane->group->planes);
 158
 159                 /* If the plane is being disabled we don't need to go through
 160                  * the full reallocation procedure. Just mark the hardware
 161                  * plane(s) as freed.
 162                  */
 163                 if (!plane_state->format) {
 164                         dev_dbg(rcdu->dev, "%s: plane is being disabled\n",
 165                                 __func__);
 166                         index = plane - plane->group->planes;
 167                         group_freed_planes[plane->group->index] |= 1 << index;
 168                         plane_state->hwindex = -1;
 169                         continue;
 170                 }
 171
 172                 /* If the plane needs to be reallocated mark it as such, and
 173                  * mark the hardware plane(s) as free.
 174                  */
 175                 if (rcar_du_plane_needs_realloc(plane, plane_state)) {
 176                         dev_dbg(rcdu->dev, "%s: plane needs reallocation\n",
 177                                 __func__);
 178                         groups |= 1 << plane->group->index;
 179                         needs_realloc = true;
 180
 181                         index = plane - plane->group->planes;
 182                         group_freed_planes[plane->group->index] |= 1 << index;
 183                         plane_state->hwindex = -1;
 184                 }
 185         }
 186
 187         if (!needs_realloc)
 188                 return 0;
 189
 190         /* Grab all plane states for the groups that need reallocation to ensure
 191          * locking and avoid racy updates. This serializes the update operation,
 192          * but there's not much we can do about it as that's the hardware
 193          * design.
 194          *
 195          * Compute the used planes mask for each group at the same time to avoid
 196          * looping over the planes separately later.
 197          */
 198         while (groups) {
 199                 unsigned int index = ffs(groups) - 1;
 200                 struct rcar_du_group *group = &rcdu->groups[index];
 201                 unsigned int used_planes = 0;
 202
 203                 dev_dbg(rcdu->dev, "%s: finding free planes for group %u\n",
 204                         __func__, index);
 205
 206                 for (i = 0; i < group->num_planes; ++i) {
 207                         struct rcar_du_plane *plane = &group->planes[i];
 208                         struct rcar_du_plane_state *plane_state;
 209                         struct drm_plane_state *s;
 210
 211                         s = drm_atomic_get_plane_state(state, &plane->plane);
 212                         if (IS_ERR(s))
 213                                 return PTR_ERR(s);
 214
 215                         /* If the plane has been freed in the above loop its
 216                          * hardware planes must not be added to the used planes
 217                          * bitmask. However, the current state doesn't reflect
 218                          * the free state yet, as we've modified the new state
 219                          * above. Use the local freed planes list to check for
 220                          * that condition instead.
 221                          */
 222                         if (group_freed_planes[index] & (1 << i)) {
 223                                 dev_dbg(rcdu->dev,
 224                                         "%s: plane (%u,%tu) has been freed, skipping\n",
 225                                         __func__, plane->group->index,
 226                                         plane - plane->group->planes);
 227                                 continue;
 228                         }
 229
 230                         plane_state = to_rcar_plane_state(plane->plane.state);
 231                         used_planes |= rcar_du_plane_hwmask(plane_state);
 232
 233                         dev_dbg(rcdu->dev,
 234                                 "%s: plane (%u,%tu) uses %u hwplanes (index %d)\n",
 235                                 __func__, plane->group->index,
 236                                 plane - plane->group->planes,
 237                                 plane_state->format ?
 238                                 plane_state->format->planes : 0,
 239                                 plane_state->hwindex);
 240                 }
 241
 242                 group_free_planes[index] = 0xff & ~used_planes;
 243                 groups &= ~(1 << index);
 244
 245                 dev_dbg(rcdu->dev, "%s: group %u free planes mask 0x%02x\n",
 246                         __func__, index, group_free_planes[index]);
 247         }
 248
 249         /* Reallocate hardware planes for each plane that needs it. */
 250         for (i = 0; i < dev->mode_config.num_total_plane; ++i) {
 251                 struct rcar_du_plane_state *plane_state;
 252                 struct rcar_du_plane *plane;
 253                 unsigned int crtc_planes;
 254                 unsigned int free;
 255                 int idx;
 256
 257                 if (!state->planes[i])
 258                         continue;
 259
 260                 plane = to_rcar_plane(state->planes[i]);
 261                 plane_state = to_rcar_plane_state(state->plane_states[i]);
 262
 263                 dev_dbg(rcdu->dev, "%s: allocating plane (%u,%tu)\n", __func__,
 264                         plane->group->index, plane - plane->group->planes);
 265
 266                 /* Skip planes that are being disabled or don't need to be
 267                  * reallocated.
 268                  */
 269                 if (!plane_state->format ||
 270                     !rcar_du_plane_needs_realloc(plane, plane_state))
 271                         continue;
 272
 273                 /* Try to allocate the plane from the free planes currently
 274                  * associated with the target CRTC to avoid restarting the CRTC
 275                  * group and thus minimize flicker. If it fails fall back to
 276                  * allocating from all free planes.
 277                  */
 278                 crtc_planes = to_rcar_crtc(plane_state->state.crtc)->index % 2
 279                             ? plane->group->dptsr_planes
 280                             : ~plane->group->dptsr_planes;
 281                 free = group_free_planes[plane->group->index];
 282
 283                 idx = rcar_du_plane_hwalloc(plane, plane_state,
 284                                             free & crtc_planes);
 285                 if (idx < 0)
 286                         idx = rcar_du_plane_hwalloc(plane, plane_state,
 287                                                     free);
 288                 if (idx < 0) {
 289                         dev_dbg(rcdu->dev, "%s: no available hardware plane\n",
 290                                 __func__);
 291                         return idx;
 292                 }
 293
 294                 dev_dbg(rcdu->dev, "%s: allocated %u hwplanes (index %u)\n",
 295                         __func__, plane_state->format->planes, idx);
 296
 297                 plane_state->hwindex = idx;
 298
 299                 group_free_planes[plane->group->index] &=
 300                         ~rcar_du_plane_hwmask(plane_state);
 301
 302                 dev_dbg(rcdu->dev, "%s: group %u free planes mask 0x%02x\n",
 303                         __func__, plane->group->index,
 304                         group_free_planes[plane->group->index]);
 305         }
 306
 307         return 0;
 308 }
 309
 310 /* -----------------------------------------------------------------------------
 311  * Plane Setup
 312  */
 313
 314 #define RCAR_DU_COLORKEY_NONE           (0 << 24)
 315 #define RCAR_DU_COLORKEY_SOURCE         (1 << 24)
 316 #define RCAR_DU_COLORKEY_MASK           (1 << 24)
 317
 318 static void rcar_du_plane_write(struct rcar_du_group *rgrp,
 319                                 unsigned int index, u32 reg, u32 data)
 320 {
 321         rcar_du_write(rgrp->dev, rgrp->mmio_offset + index * PLANE_OFF + reg,
 322                       data);
 323 }
 324
 325 static void rcar_du_plane_setup_scanout(struct rcar_du_group *rgrp,
 326                                         const struct rcar_du_plane_state *state)
 327 {
 328         unsigned int src_x = state->state.src_x >> 16;
 329         unsigned int src_y = state->state.src_y >> 16;
 330         unsigned int index = state->hwindex;
 331         unsigned int pitch;
 332         bool interlaced;
 333         u32 dma[2];
 334
 335         interlaced = state->state.crtc->state->adjusted_mode.flags
 336                    & DRM_MODE_FLAG_INTERLACE;
 337
 338         if (state->source == RCAR_DU_PLANE_MEMORY) {
 339                 struct drm_framebuffer *fb = state->state.fb;
 340                 struct drm_gem_cma_object *gem;
 341                 unsigned int i;
 342
 343                 if (state->format->planes == 2)
 344                         pitch = fb->pitches[0];
 345                 else
 346                         pitch = fb->pitches[0] * 8 / state->format->bpp;
 347
 348                 for (i = 0; i < state->format->planes; ++i) {
 349                         gem = drm_fb_cma_get_gem_obj(fb, i);
 350                         dma[i] = gem->paddr + fb->offsets[i];
 351                 }
 352         } else {
 353                 pitch = state->state.src_w >> 16;
 354                 dma[0] = 0;
 355                 dma[1] = 0;
 356         }
 357
 358         /* Memory pitch (expressed in pixels). Must be doubled for interlaced
 359          * operation with 32bpp formats.
 360          */
 361         rcar_du_plane_write(rgrp, index, PnMWR,
 362                             (interlaced && state->format->bpp == 32) ?
 363                             pitch * 2 : pitch);
 364
 365         /* The Y position is expressed in raster line units and must be doubled
 366          * for 32bpp formats, according to the R8A7790 datasheet. No mention of
 367          * doubling the Y position is found in the R8A7779 datasheet, but the
 368          * rule seems to apply there as well.
 369          *
 370          * Despite not being documented, doubling seem not to be needed when
 371          * operating in interlaced mode.
 372          *
 373          * Similarly, for the second plane, NV12 and NV21 formats seem to
 374          * require a halved Y position value, in both progressive and interlaced
 375          * modes.
 376          */
 377         rcar_du_plane_write(rgrp, index, PnSPXR, src_x);
 378         rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
 379                             (!interlaced && state->format->bpp == 32 ? 2 : 1));
 380
 381         rcar_du_plane_write(rgrp, index, PnDSA0R, dma[0]);
 382
 383         if (state->format->planes == 2) {
 384                 index = (index + 1) % 8;
 385
 386                 rcar_du_plane_write(rgrp, index, PnMWR, pitch);
 387
 388                 rcar_du_plane_write(rgrp, index, PnSPXR, src_x);
 389                 rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
 390                                     (state->format->bpp == 16 ? 2 : 1) / 2);
 391
 392                 rcar_du_plane_write(rgrp, index, PnDSA0R, dma[1]);
 393         }
 394 }
 395
 396 static void rcar_du_plane_setup_mode(struct rcar_du_group *rgrp,
 397                                      unsigned int index,
 398                                      const struct rcar_du_plane_state *state)
 399 {
 400         u32 colorkey;
 401         u32 pnmr;
 402
 403         /* The PnALPHAR register controls alpha-blending in 16bpp formats
 404          * (ARGB1555 and XRGB1555).
 405          *
 406          * For ARGB, set the alpha value to 0, and enable alpha-blending when
 407          * the A bit is 0. This maps A=0 to alpha=0 and A=1 to alpha=255.
 408          *
 409          * For XRGB, set the alpha value to the plane-wide alpha value and
 410          * enable alpha-blending regardless of the X bit value.
 411          */
 412         if (state->format->fourcc != DRM_FORMAT_XRGB1555)
 413                 rcar_du_plane_write(rgrp, index, PnALPHAR, PnALPHAR_ABIT_0);
 414         else
 415                 rcar_du_plane_write(rgrp, index, PnALPHAR,
 416                                     PnALPHAR_ABIT_X | state->alpha);
 417
 418         pnmr = PnMR_BM_MD | state->format->pnmr;
 419
 420         /* Disable color keying when requested. YUV formats have the
 421          * PnMR_SPIM_TP_OFF bit set in their pnmr field, disabling color keying
 422          * automatically.
 423          */
 424         if ((state->colorkey & RCAR_DU_COLORKEY_MASK) == RCAR_DU_COLORKEY_NONE)
 425                 pnmr |= PnMR_SPIM_TP_OFF;
 426
 427         /* For packed YUV formats we need to select the U/V order. */
 428         if (state->format->fourcc == DRM_FORMAT_YUYV)
 429                 pnmr |= PnMR_YCDF_YUYV;
 430
 431         rcar_du_plane_write(rgrp, index, PnMR, pnmr);
 432
 433         switch (state->format->fourcc) {
 434         case DRM_FORMAT_RGB565:
 435                 colorkey = ((state->colorkey & 0xf80000) >> 8)
 436                          | ((state->colorkey & 0x00fc00) >> 5)
 437                          | ((state->colorkey & 0x0000f8) >> 3);
 438                 rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
 439                 break;
 440
 441         case DRM_FORMAT_ARGB1555:
 442         case DRM_FORMAT_XRGB1555:
 443                 colorkey = ((state->colorkey & 0xf80000) >> 9)
 444                          | ((state->colorkey & 0x00f800) >> 6)
 445                          | ((state->colorkey & 0x0000f8) >> 3);
 446                 rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
 447                 break;
 448
 449         case DRM_FORMAT_XRGB8888:
 450         case DRM_FORMAT_ARGB8888:
 451                 rcar_du_plane_write(rgrp, index, PnTC3R,
 452                                     PnTC3R_CODE | (state->colorkey & 0xffffff));
 453                 break;
 454         }
 455 }
 456
 457 static void rcar_du_plane_setup_format_gen2(struct rcar_du_group *rgrp,
 458                                             unsigned int index,
 459                                             const struct rcar_du_plane_state *state)
 460 {
 461         u32 ddcr2 = PnDDCR2_CODE;
 462         u32 ddcr4;
 463
 464         /* Data format
 465          *
 466          * The data format is selected by the DDDF field in PnMR and the EDF
 467          * field in DDCR4.
 468          */
 469
 470         rcar_du_plane_setup_mode(rgrp, index, state);
 471
 472         if (state->format->planes == 2) {
 473                 if (state->hwindex != index) {
 474                         if (state->format->fourcc == DRM_FORMAT_NV12 ||
 475                             state->format->fourcc == DRM_FORMAT_NV21)
 476                                 ddcr2 |= PnDDCR2_Y420;
 477
 478                         if (state->format->fourcc == DRM_FORMAT_NV21)
 479                                 ddcr2 |= PnDDCR2_NV21;
 480
 481                         ddcr2 |= PnDDCR2_DIVU;
 482                 } else {
 483                         ddcr2 |= PnDDCR2_DIVY;
 484                 }
 485         }
 486
 487         rcar_du_plane_write(rgrp, index, PnDDCR2, ddcr2);
 488
 489         ddcr4 = state->format->edf | PnDDCR4_CODE;
 490         if (state->source != RCAR_DU_PLANE_MEMORY)
 491                 ddcr4 |= PnDDCR4_VSPS;
 492
 493         rcar_du_plane_write(rgrp, index, PnDDCR4, ddcr4);
 494 }
 495
 496 static void rcar_du_plane_setup_format_gen3(struct rcar_du_group *rgrp,
 497                                             unsigned int index,
 498                                             const struct rcar_du_plane_state *state)
 499 {
 500         rcar_du_plane_write(rgrp, index, PnMR,
 501                             PnMR_SPIM_TP_OFF | state->format->pnmr);
 502
 503         rcar_du_plane_write(rgrp, index, PnDDCR4,
 504                             state->format->edf | PnDDCR4_CODE);
 505 }
 506
 507 static void rcar_du_plane_setup_format(struct rcar_du_group *rgrp,
 508                                        unsigned int index,
 509                                        const struct rcar_du_plane_state *state)
 510 {
 511         struct rcar_du_device *rcdu = rgrp->dev;
 512
 513         if (rcdu->info->gen < 3)
 514                 rcar_du_plane_setup_format_gen2(rgrp, index, state);
 515         else
 516                 rcar_du_plane_setup_format_gen3(rgrp, index, state);
 517
 518         /* Destination position and size */
 519         rcar_du_plane_write(rgrp, index, PnDSXR, state->state.crtc_w);
 520         rcar_du_plane_write(rgrp, index, PnDSYR, state->state.crtc_h);
 521         rcar_du_plane_write(rgrp, index, PnDPXR, state->state.crtc_x);
 522         rcar_du_plane_write(rgrp, index, PnDPYR, state->state.crtc_y);
 523
 524         if (rcdu->info->gen < 3) {
 525                 /* Wrap-around and blinking, disabled */
 526                 rcar_du_plane_write(rgrp, index, PnWASPR, 0);
 527                 rcar_du_plane_write(rgrp, index, PnWAMWR, 4095);
 528                 rcar_du_plane_write(rgrp, index, PnBTR, 0);
 529                 rcar_du_plane_write(rgrp, index, PnMLR, 0);
 530         }
 531 }
 532
 533 void __rcar_du_plane_setup(struct rcar_du_group *rgrp,
 534                            const struct rcar_du_plane_state *state)
 535 {
 536         struct rcar_du_device *rcdu = rgrp->dev;
 537
 538         rcar_du_plane_setup_format(rgrp, state->hwindex, state);
 539         if (state->format->planes == 2)
 540                 rcar_du_plane_setup_format(rgrp, (state->hwindex + 1) % 8,
 541                                            state);
 542
 543         if (rcdu->info->gen < 3)
 544                 rcar_du_plane_setup_scanout(rgrp, state);
 545
 546         if (state->source == RCAR_DU_PLANE_VSPD1) {
 547                 unsigned int vspd1_sink = rgrp->index ? 2 : 0;
 548
 549                 if (rcdu->vspd1_sink != vspd1_sink) {
 550                         rcdu->vspd1_sink = vspd1_sink;
 551                         rcar_du_set_dpad0_vsp1_routing(rcdu);
 552                 }
 553         }
 554 }
 555
 556 static int rcar_du_plane_atomic_check(struct drm_plane *plane,
 557                                       struct drm_plane_state *state)
 558 {
 559         struct rcar_du_plane_state *rstate = to_rcar_plane_state(state);
 560         struct rcar_du_plane *rplane = to_rcar_plane(plane);
 561         struct rcar_du_device *rcdu = rplane->group->dev;
 562
 563         if (!state->fb || !state->crtc) {
 564                 rstate->format = NULL;
 565                 return 0;
 566         }
 567
 568         if (state->src_w >> 16 != state->crtc_w ||
 569             state->src_h >> 16 != state->crtc_h) {
 570                 dev_dbg(rcdu->dev, "%s: scaling not supported\n", __func__);
 571                 return -EINVAL;
 572         }
 573
 574         rstate->format = rcar_du_format_info(state->fb->pixel_format);
 575         if (rstate->format == NULL) {
 576                 dev_dbg(rcdu->dev, "%s: unsupported format %08x\n", __func__,
 577                         state->fb->pixel_format);
 578                 return -EINVAL;
 579         }
 580
 581         return 0;
 582 }
 583
 584 static void rcar_du_plane_atomic_update(struct drm_plane *plane,
 585                                         struct drm_plane_state *old_state)
 586 {
 587         struct rcar_du_plane *rplane = to_rcar_plane(plane);
 588         struct rcar_du_plane_state *old_rstate;
 589         struct rcar_du_plane_state *new_rstate;
 590
 591         if (!plane->state->crtc)
 592                 return;
 593
 594         rcar_du_plane_setup(rplane);
 595
 596         /* Check whether the source has changed from memory to live source or
 597          * from live source to memory. The source has been configured by the
 598          * VSPS bit in the PnDDCR4 register. Although the datasheet states that
 599          * the bit is updated during vertical blanking, it seems that updates
 600          * only occur when the DU group is held in reset through the DSYSR.DRES
 601          * bit. We thus need to restart the group if the source changes.
 602          */
 603         old_rstate = to_rcar_plane_state(old_state);
 604         new_rstate = to_rcar_plane_state(plane->state);
 605
 606         if ((old_rstate->source == RCAR_DU_PLANE_MEMORY) !=
 607             (new_rstate->source == RCAR_DU_PLANE_MEMORY))
 608                 rplane->group->need_restart = true;
 609 }
 610
 611 static const struct drm_plane_helper_funcs rcar_du_plane_helper_funcs = {
 612         .atomic_check = rcar_du_plane_atomic_check,
 613         .atomic_update = rcar_du_plane_atomic_update,
 614 };
 615
 616 static struct drm_plane_state *
 617 rcar_du_plane_atomic_duplicate_state(struct drm_plane *plane)
 618 {
 619         struct rcar_du_plane_state *state;
 620         struct rcar_du_plane_state *copy;
 621
 622         if (WARN_ON(!plane->state))
 623                 return NULL;
 624
 625         state = to_rcar_plane_state(plane->state);
 626         copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
 627         if (copy == NULL)
 628                 return NULL;
 629
 630         __drm_atomic_helper_plane_duplicate_state(plane, &copy->state);
 631
 632         return &copy->state;
 633 }
 634
 635 static void rcar_du_plane_atomic_destroy_state(struct drm_plane *plane,
 636                                                struct drm_plane_state *state)
 637 {
 638         __drm_atomic_helper_plane_destroy_state(plane, state);
 639         kfree(to_rcar_plane_state(state));
 640 }
 641
 642 static void rcar_du_plane_reset(struct drm_plane *plane)
 643 {
 644         struct rcar_du_plane_state *state;
 645
 646         if (plane->state) {
 647                 rcar_du_plane_atomic_destroy_state(plane, plane->state);
 648                 plane->state = NULL;
 649         }
 650
 651         state = kzalloc(sizeof(*state), GFP_KERNEL);
 652         if (state == NULL)
 653                 return;
 654
 655         state->hwindex = -1;
 656         state->source = RCAR_DU_PLANE_MEMORY;
 657         state->alpha = 255;
 658         state->colorkey = RCAR_DU_COLORKEY_NONE;
 659         state->zpos = plane->type == DRM_PLANE_TYPE_PRIMARY ? 0 : 1;
 660
 661         plane->state = &state->state;
 662         plane->state->plane = plane;
 663 }
 664
 665 static int rcar_du_plane_atomic_set_property(struct drm_plane *plane,
 666                                              struct drm_plane_state *state,
 667                                              struct drm_property *property,
 668                                              uint64_t val)
 669 {
 670         struct rcar_du_plane_state *rstate = to_rcar_plane_state(state);
 671         struct rcar_du_device *rcdu = to_rcar_plane(plane)->group->dev;
 672
 673         if (property == rcdu->props.alpha)
 674                 rstate->alpha = val;
 675         else if (property == rcdu->props.colorkey)
 676                 rstate->colorkey = val;
 677         else if (property == rcdu->props.zpos)
 678                 rstate->zpos = val;
 679         else
 680                 return -EINVAL;
 681
 682         return 0;
 683 }
 684
 685 static int rcar_du_plane_atomic_get_property(struct drm_plane *plane,
 686         const struct drm_plane_state *state, struct drm_property *property,
 687         uint64_t *val)
 688 {
 689         const struct rcar_du_plane_state *rstate =
 690                 container_of(state, const struct rcar_du_plane_state, state);
 691         struct rcar_du_device *rcdu = to_rcar_plane(plane)->group->dev;
 692
 693         if (property == rcdu->props.alpha)
 694                 *val = rstate->alpha;
 695         else if (property == rcdu->props.colorkey)
 696                 *val = rstate->colorkey;
 697         else if (property == rcdu->props.zpos)
 698                 *val = rstate->zpos;
 699         else
 700                 return -EINVAL;
 701
 702         return 0;
 703 }
 704
 705 static const struct drm_plane_funcs rcar_du_plane_funcs = {
 706         .update_plane = drm_atomic_helper_update_plane,
 707         .disable_plane = drm_atomic_helper_disable_plane,
 708         .reset = rcar_du_plane_reset,
 709         .set_property = drm_atomic_helper_plane_set_property,
 710         .destroy = drm_plane_cleanup,
 711         .atomic_duplicate_state = rcar_du_plane_atomic_duplicate_state,
 712         .atomic_destroy_state = rcar_du_plane_atomic_destroy_state,
 713         .atomic_set_property = rcar_du_plane_atomic_set_property,
 714         .atomic_get_property = rcar_du_plane_atomic_get_property,
 715 };
 716
 717 static const uint32_t formats[] = {
 718         DRM_FORMAT_RGB565,
 719         DRM_FORMAT_ARGB1555,
 720         DRM_FORMAT_XRGB1555,
 721         DRM_FORMAT_XRGB8888,
 722         DRM_FORMAT_ARGB8888,
 723         DRM_FORMAT_UYVY,
 724         DRM_FORMAT_YUYV,
 725         DRM_FORMAT_NV12,
 726         DRM_FORMAT_NV21,
 727         DRM_FORMAT_NV16,
 728 };
 729
 730 int rcar_du_planes_init(struct rcar_du_group *rgrp)
 731 {
 732         struct rcar_du_device *rcdu = rgrp->dev;
 733         unsigned int crtcs;
 734         unsigned int i;
 735         int ret;
 736
 737          /* Create one primary plane per CRTC in this group and seven overlay
 738           * planes.
 739           */
 740         rgrp->num_planes = rgrp->num_crtcs + 7;
 741
 742         crtcs = ((1 << rcdu->num_crtcs) - 1) & (3 << (2 * rgrp->index));
 743
 744         for (i = 0; i < rgrp->num_planes; ++i) {
 745                 enum drm_plane_type type = i < rgrp->num_crtcs
 746                                          ? DRM_PLANE_TYPE_PRIMARY
 747                                          : DRM_PLANE_TYPE_OVERLAY;
 748                 struct rcar_du_plane *plane = &rgrp->planes[i];
 749
 750                 plane->group = rgrp;
 751
 752                 ret = drm_universal_plane_init(rcdu->ddev, &plane->plane, crtcs,
 753                                                &rcar_du_plane_funcs, formats,
 754                                                ARRAY_SIZE(formats), type,
 755                                                NULL);
 756                 if (ret < 0)
 757                         return ret;
 758
 759                 drm_plane_helper_add(&plane->plane,
 760                                      &rcar_du_plane_helper_funcs);
 761
 762                 if (type == DRM_PLANE_TYPE_PRIMARY)
 763                         continue;
 764
 765                 drm_object_attach_property(&plane->plane.base,
 766                                            rcdu->props.alpha, 255);
 767                 drm_object_attach_property(&plane->plane.base,
 768                                            rcdu->props.colorkey,
 769                                            RCAR_DU_COLORKEY_NONE);
 770                 drm_object_attach_property(&plane->plane.base,
 771                                            rcdu->props.zpos, 1);
 772         }
 773
 774         return 0;
 775 }