drivers/media/platform/renesas/vsp1/vsp1_drv.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * vsp1_drv.c  --  R-Car VSP1 Driver
   4  *
   5  * Copyright (C) 2013-2015 Renesas Electronics Corporation
   6  *
   7  * Contact: Laurent Pinchart ([email protected])
   8  */
   9
  10 #include <linux/clk.h>
  11 #include <linux/delay.h>
  12 #include <linux/device.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/module.h>
  15 #include <linux/of.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/pm_runtime.h>
  18 #include <linux/reset.h>
  19 #include <linux/videodev2.h>
  20
  21 #include <media/rcar-fcp.h>
  22 #include <media/v4l2-subdev.h>
  23
  24 #include "vsp1.h"
  25 #include "vsp1_brx.h"
  26 #include "vsp1_clu.h"
  27 #include "vsp1_dl.h"
  28 #include "vsp1_drm.h"
  29 #include "vsp1_hgo.h"
  30 #include "vsp1_hgt.h"
  31 #include "vsp1_hsit.h"
  32 #include "vsp1_lif.h"
  33 #include "vsp1_lut.h"
  34 #include "vsp1_pipe.h"
  35 #include "vsp1_rwpf.h"
  36 #include "vsp1_sru.h"
  37 #include "vsp1_uds.h"
  38 #include "vsp1_uif.h"
  39 #include "vsp1_video.h"
  40
  41 /* -----------------------------------------------------------------------------
  42  * Interrupt Handling
  43  */
  44
  45 static irqreturn_t vsp1_irq_handler(int irq, void *data)
  46 {
  47         u32 mask = VI6_WPF_IRQ_STA_DFE | VI6_WPF_IRQ_STA_FRE |
  48                    VI6_WPF_IRQ_STA_UND;
  49         struct vsp1_device *vsp1 = data;
  50         irqreturn_t ret = IRQ_NONE;
  51         unsigned int i;
  52         u32 status;
  53
  54         for (i = 0; i < vsp1->info->wpf_count; ++i) {
  55                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
  56
  57                 if (wpf == NULL)
  58                         continue;
  59
  60                 status = vsp1_read(vsp1, VI6_WPF_IRQ_STA(i));
  61                 vsp1_write(vsp1, VI6_WPF_IRQ_STA(i), ~status & mask);
  62
  63                 if ((status & VI6_WPF_IRQ_STA_UND) && wpf->entity.pipe) {
  64                         wpf->entity.pipe->underrun_count++;
  65
  66                         dev_warn_ratelimited(vsp1->dev,
  67                                 "Underrun occurred at WPF%u (total underruns %u)\n",
  68                                 i, wpf->entity.pipe->underrun_count);
  69                 }
  70
  71                 if (status & VI6_WPF_IRQ_STA_DFE) {
  72                         vsp1_pipeline_frame_end(wpf->entity.pipe);
  73                         ret = IRQ_HANDLED;
  74                 }
  75         }
  76
  77         return ret;
  78 }
  79
  80 /* -----------------------------------------------------------------------------
  81  * Entities
  82  */
  83
  84 /*
  85  * vsp1_create_sink_links - Create links from all sources to the given sink
  86  *
  87  * This function creates media links from all valid sources to the given sink
  88  * pad. Links that would be invalid according to the VSP1 hardware capabilities
  89  * are skipped. Those include all links
  90  *
  91  * - from a UDS to a UDS (UDS entities can't be chained)
  92  * - from an entity to itself (no loops are allowed)
  93  *
  94  * Furthermore, the BRS can't be connected to histogram generators, but no
  95  * special check is currently needed as all VSP instances that include a BRS
  96  * have no histogram generator.
  97  */
  98 static int vsp1_create_sink_links(struct vsp1_device *vsp1,
  99                                   struct vsp1_entity *sink)
 100 {
 101         struct media_entity *entity = &sink->subdev.entity;
 102         struct vsp1_entity *source;
 103         unsigned int pad;
 104         int ret;
 105
 106         list_for_each_entry(source, &vsp1->entities, list_dev) {
 107                 u32 flags;
 108
 109                 if (source->type == sink->type)
 110                         continue;
 111
 112                 if (source->type == VSP1_ENTITY_HGO ||
 113                     source->type == VSP1_ENTITY_HGT ||
 114                     source->type == VSP1_ENTITY_LIF ||
 115                     source->type == VSP1_ENTITY_WPF)
 116                         continue;
 117
 118                 flags = source->type == VSP1_ENTITY_RPF &&
 119                         sink->type == VSP1_ENTITY_WPF &&
 120                         source->index == sink->index
 121                       ? MEDIA_LNK_FL_ENABLED : 0;
 122
 123                 for (pad = 0; pad < entity->num_pads; ++pad) {
 124                         if (!(entity->pads[pad].flags & MEDIA_PAD_FL_SINK))
 125                                 continue;
 126
 127                         ret = media_create_pad_link(&source->subdev.entity,
 128                                                        source->source_pad,
 129                                                        entity, pad, flags);
 130                         if (ret < 0)
 131                                 return ret;
 132
 133                         if (flags & MEDIA_LNK_FL_ENABLED)
 134                                 source->sink = sink;
 135                 }
 136         }
 137
 138         return 0;
 139 }
 140
 141 static int vsp1_uapi_create_links(struct vsp1_device *vsp1)
 142 {
 143         struct vsp1_entity *entity;
 144         unsigned int i;
 145         int ret;
 146
 147         list_for_each_entry(entity, &vsp1->entities, list_dev) {
 148                 if (entity->type == VSP1_ENTITY_LIF ||
 149                     entity->type == VSP1_ENTITY_RPF)
 150                         continue;
 151
 152                 ret = vsp1_create_sink_links(vsp1, entity);
 153                 if (ret < 0)
 154                         return ret;
 155         }
 156
 157         if (vsp1->hgo) {
 158                 ret = media_create_pad_link(&vsp1->hgo->histo.entity.subdev.entity,
 159                                             HISTO_PAD_SOURCE,
 160                                             &vsp1->hgo->histo.video.entity, 0,
 161                                             MEDIA_LNK_FL_ENABLED |
 162                                             MEDIA_LNK_FL_IMMUTABLE);
 163                 if (ret < 0)
 164                         return ret;
 165         }
 166
 167         if (vsp1->hgt) {
 168                 ret = media_create_pad_link(&vsp1->hgt->histo.entity.subdev.entity,
 169                                             HISTO_PAD_SOURCE,
 170                                             &vsp1->hgt->histo.video.entity, 0,
 171                                             MEDIA_LNK_FL_ENABLED |
 172                                             MEDIA_LNK_FL_IMMUTABLE);
 173                 if (ret < 0)
 174                         return ret;
 175         }
 176
 177         for (i = 0; i < vsp1->info->lif_count; ++i) {
 178                 if (!vsp1->lif[i])
 179                         continue;
 180
 181                 ret = media_create_pad_link(&vsp1->wpf[i]->entity.subdev.entity,
 182                                             RWPF_PAD_SOURCE,
 183                                             &vsp1->lif[i]->entity.subdev.entity,
 184                                             LIF_PAD_SINK, 0);
 185                 if (ret < 0)
 186                         return ret;
 187         }
 188
 189         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 190                 struct vsp1_rwpf *rpf = vsp1->rpf[i];
 191
 192                 ret = media_create_pad_link(&rpf->video->video.entity, 0,
 193                                             &rpf->entity.subdev.entity,
 194                                             RWPF_PAD_SINK,
 195                                             MEDIA_LNK_FL_ENABLED |
 196                                             MEDIA_LNK_FL_IMMUTABLE);
 197                 if (ret < 0)
 198                         return ret;
 199         }
 200
 201         for (i = 0; i < vsp1->info->wpf_count; ++i) {
 202                 /*
 203                  * Connect the video device to the WPF. All connections are
 204                  * immutable.
 205                  */
 206                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
 207
 208                 ret = media_create_pad_link(&wpf->entity.subdev.entity,
 209                                             RWPF_PAD_SOURCE,
 210                                             &wpf->video->video.entity, 0,
 211                                             MEDIA_LNK_FL_IMMUTABLE |
 212                                             MEDIA_LNK_FL_ENABLED);
 213                 if (ret < 0)
 214                         return ret;
 215         }
 216
 217         return 0;
 218 }
 219
 220 static void vsp1_destroy_entities(struct vsp1_device *vsp1)
 221 {
 222         struct vsp1_entity *entity, *_entity;
 223         struct vsp1_video *video, *_video;
 224
 225         list_for_each_entry_safe(entity, _entity, &vsp1->entities, list_dev) {
 226                 list_del(&entity->list_dev);
 227                 vsp1_entity_destroy(entity);
 228         }
 229
 230         list_for_each_entry_safe(video, _video, &vsp1->videos, list) {
 231                 list_del(&video->list);
 232                 vsp1_video_cleanup(video);
 233         }
 234
 235         v4l2_device_unregister(&vsp1->v4l2_dev);
 236         if (vsp1->info->uapi)
 237                 media_device_unregister(&vsp1->media_dev);
 238         media_device_cleanup(&vsp1->media_dev);
 239
 240         if (!vsp1->info->uapi)
 241                 vsp1_drm_cleanup(vsp1);
 242 }
 243
 244 static int vsp1_create_entities(struct vsp1_device *vsp1)
 245 {
 246         struct media_device *mdev = &vsp1->media_dev;
 247         struct v4l2_device *vdev = &vsp1->v4l2_dev;
 248         struct vsp1_entity *entity;
 249         unsigned int i;
 250         int ret;
 251
 252         mdev->dev = vsp1->dev;
 253         mdev->hw_revision = vsp1->version;
 254         strscpy(mdev->model, vsp1->info->model, sizeof(mdev->model));
 255         media_device_init(mdev);
 256
 257         vsp1->media_ops.link_setup = vsp1_entity_link_setup;
 258         /*
 259          * Don't perform link validation when the userspace API is disabled as
 260          * the pipeline is configured internally by the driver in that case, and
 261          * its configuration can thus be trusted.
 262          */
 263         if (vsp1->info->uapi)
 264                 vsp1->media_ops.link_validate = v4l2_subdev_link_validate;
 265
 266         vdev->mdev = mdev;
 267         ret = v4l2_device_register(vsp1->dev, vdev);
 268         if (ret < 0) {
 269                 dev_err(vsp1->dev, "V4L2 device registration failed (%d)\n",
 270                         ret);
 271                 goto done;
 272         }
 273
 274         /* Instantiate all the entities. */
 275         if (vsp1_feature(vsp1, VSP1_HAS_BRS)) {
 276                 vsp1->brs = vsp1_brx_create(vsp1, VSP1_ENTITY_BRS);
 277                 if (IS_ERR(vsp1->brs)) {
 278                         ret = PTR_ERR(vsp1->brs);
 279                         goto done;
 280                 }
 281
 282                 list_add_tail(&vsp1->brs->entity.list_dev, &vsp1->entities);
 283         }
 284
 285         if (vsp1_feature(vsp1, VSP1_HAS_BRU)) {
 286                 vsp1->bru = vsp1_brx_create(vsp1, VSP1_ENTITY_BRU);
 287                 if (IS_ERR(vsp1->bru)) {
 288                         ret = PTR_ERR(vsp1->bru);
 289                         goto done;
 290                 }
 291
 292                 list_add_tail(&vsp1->bru->entity.list_dev, &vsp1->entities);
 293         }
 294
 295         if (vsp1_feature(vsp1, VSP1_HAS_CLU)) {
 296                 vsp1->clu = vsp1_clu_create(vsp1);
 297                 if (IS_ERR(vsp1->clu)) {
 298                         ret = PTR_ERR(vsp1->clu);
 299                         goto done;
 300                 }
 301
 302                 list_add_tail(&vsp1->clu->entity.list_dev, &vsp1->entities);
 303         }
 304
 305         vsp1->hsi = vsp1_hsit_create(vsp1, true);
 306         if (IS_ERR(vsp1->hsi)) {
 307                 ret = PTR_ERR(vsp1->hsi);
 308                 goto done;
 309         }
 310
 311         list_add_tail(&vsp1->hsi->entity.list_dev, &vsp1->entities);
 312
 313         vsp1->hst = vsp1_hsit_create(vsp1, false);
 314         if (IS_ERR(vsp1->hst)) {
 315                 ret = PTR_ERR(vsp1->hst);
 316                 goto done;
 317         }
 318
 319         list_add_tail(&vsp1->hst->entity.list_dev, &vsp1->entities);
 320
 321         if (vsp1_feature(vsp1, VSP1_HAS_HGO) && vsp1->info->uapi) {
 322                 vsp1->hgo = vsp1_hgo_create(vsp1);
 323                 if (IS_ERR(vsp1->hgo)) {
 324                         ret = PTR_ERR(vsp1->hgo);
 325                         goto done;
 326                 }
 327
 328                 list_add_tail(&vsp1->hgo->histo.entity.list_dev,
 329                               &vsp1->entities);
 330         }
 331
 332         if (vsp1_feature(vsp1, VSP1_HAS_HGT) && vsp1->info->uapi) {
 333                 vsp1->hgt = vsp1_hgt_create(vsp1);
 334                 if (IS_ERR(vsp1->hgt)) {
 335                         ret = PTR_ERR(vsp1->hgt);
 336                         goto done;
 337                 }
 338
 339                 list_add_tail(&vsp1->hgt->histo.entity.list_dev,
 340                               &vsp1->entities);
 341         }
 342
 343         /*
 344          * The LIFs are only supported when used in conjunction with the DU, in
 345          * which case the userspace API is disabled. If the userspace API is
 346          * enabled skip the LIFs, even when present.
 347          */
 348         if (!vsp1->info->uapi) {
 349                 for (i = 0; i < vsp1->info->lif_count; ++i) {
 350                         struct vsp1_lif *lif;
 351
 352                         lif = vsp1_lif_create(vsp1, i);
 353                         if (IS_ERR(lif)) {
 354                                 ret = PTR_ERR(lif);
 355                                 goto done;
 356                         }
 357
 358                         vsp1->lif[i] = lif;
 359                         list_add_tail(&lif->entity.list_dev, &vsp1->entities);
 360                 }
 361         }
 362
 363         if (vsp1_feature(vsp1, VSP1_HAS_LUT)) {
 364                 vsp1->lut = vsp1_lut_create(vsp1);
 365                 if (IS_ERR(vsp1->lut)) {
 366                         ret = PTR_ERR(vsp1->lut);
 367                         goto done;
 368                 }
 369
 370                 list_add_tail(&vsp1->lut->entity.list_dev, &vsp1->entities);
 371         }
 372
 373         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 374                 struct vsp1_rwpf *rpf;
 375
 376                 rpf = vsp1_rpf_create(vsp1, i);
 377                 if (IS_ERR(rpf)) {
 378                         ret = PTR_ERR(rpf);
 379                         goto done;
 380                 }
 381
 382                 vsp1->rpf[i] = rpf;
 383                 list_add_tail(&rpf->entity.list_dev, &vsp1->entities);
 384
 385                 if (vsp1->info->uapi) {
 386                         struct vsp1_video *video = vsp1_video_create(vsp1, rpf);
 387
 388                         if (IS_ERR(video)) {
 389                                 ret = PTR_ERR(video);
 390                                 goto done;
 391                         }
 392
 393                         list_add_tail(&video->list, &vsp1->videos);
 394                 }
 395         }
 396
 397         if (vsp1_feature(vsp1, VSP1_HAS_SRU)) {
 398                 vsp1->sru = vsp1_sru_create(vsp1);
 399                 if (IS_ERR(vsp1->sru)) {
 400                         ret = PTR_ERR(vsp1->sru);
 401                         goto done;
 402                 }
 403
 404                 list_add_tail(&vsp1->sru->entity.list_dev, &vsp1->entities);
 405         }
 406
 407         for (i = 0; i < vsp1->info->uds_count; ++i) {
 408                 struct vsp1_uds *uds;
 409
 410                 uds = vsp1_uds_create(vsp1, i);
 411                 if (IS_ERR(uds)) {
 412                         ret = PTR_ERR(uds);
 413                         goto done;
 414                 }
 415
 416                 vsp1->uds[i] = uds;
 417                 list_add_tail(&uds->entity.list_dev, &vsp1->entities);
 418         }
 419
 420         for (i = 0; i < vsp1->info->uif_count; ++i) {
 421                 struct vsp1_uif *uif;
 422
 423                 uif = vsp1_uif_create(vsp1, i);
 424                 if (IS_ERR(uif)) {
 425                         ret = PTR_ERR(uif);
 426                         goto done;
 427                 }
 428
 429                 vsp1->uif[i] = uif;
 430                 list_add_tail(&uif->entity.list_dev, &vsp1->entities);
 431         }
 432
 433         for (i = 0; i < vsp1->info->wpf_count; ++i) {
 434                 struct vsp1_rwpf *wpf;
 435
 436                 wpf = vsp1_wpf_create(vsp1, i);
 437                 if (IS_ERR(wpf)) {
 438                         ret = PTR_ERR(wpf);
 439                         goto done;
 440                 }
 441
 442                 vsp1->wpf[i] = wpf;
 443                 list_add_tail(&wpf->entity.list_dev, &vsp1->entities);
 444
 445                 if (vsp1->info->uapi) {
 446                         struct vsp1_video *video = vsp1_video_create(vsp1, wpf);
 447
 448                         if (IS_ERR(video)) {
 449                                 ret = PTR_ERR(video);
 450                                 goto done;
 451                         }
 452
 453                         list_add_tail(&video->list, &vsp1->videos);
 454                 }
 455         }
 456
 457         /* Register all subdevs. */
 458         list_for_each_entry(entity, &vsp1->entities, list_dev) {
 459                 ret = v4l2_device_register_subdev(&vsp1->v4l2_dev,
 460                                                   &entity->subdev);
 461                 if (ret < 0)
 462                         goto done;
 463         }
 464
 465         /*
 466          * Create links and register subdev nodes if the userspace API is
 467          * enabled or initialize the DRM pipeline otherwise.
 468          */
 469         if (vsp1->info->uapi) {
 470                 ret = vsp1_uapi_create_links(vsp1);
 471                 if (ret < 0)
 472                         goto done;
 473
 474                 ret = v4l2_device_register_subdev_nodes(&vsp1->v4l2_dev);
 475                 if (ret < 0)
 476                         goto done;
 477
 478                 ret = media_device_register(mdev);
 479         } else {
 480                 ret = vsp1_drm_init(vsp1);
 481         }
 482
 483 done:
 484         if (ret < 0)
 485                 vsp1_destroy_entities(vsp1);
 486
 487         return ret;
 488 }
 489
 490 int vsp1_reset_wpf(struct vsp1_device *vsp1, unsigned int index)
 491 {
 492         unsigned int timeout;
 493         u32 status;
 494
 495         status = vsp1_read(vsp1, VI6_STATUS);
 496         if (!(status & VI6_STATUS_SYS_ACT(index)))
 497                 return 0;
 498
 499         vsp1_write(vsp1, VI6_SRESET, VI6_SRESET_SRTS(index));
 500         for (timeout = 10; timeout > 0; --timeout) {
 501                 status = vsp1_read(vsp1, VI6_STATUS);
 502                 if (!(status & VI6_STATUS_SYS_ACT(index)))
 503                         break;
 504
 505                 usleep_range(1000, 2000);
 506         }
 507
 508         if (!timeout) {
 509                 dev_err(vsp1->dev, "failed to reset wpf.%u\n", index);
 510                 return -ETIMEDOUT;
 511         }
 512
 513         return 0;
 514 }
 515
 516 static int vsp1_device_init(struct vsp1_device *vsp1)
 517 {
 518         unsigned int i;
 519         int ret;
 520
 521         /* Reset any channel that might be running. */
 522         for (i = 0; i < vsp1->info->wpf_count; ++i) {
 523                 ret = vsp1_reset_wpf(vsp1, i);
 524                 if (ret < 0)
 525                         return ret;
 526         }
 527
 528         vsp1_write(vsp1, VI6_CLK_DCSWT, (8 << VI6_CLK_DCSWT_CSTPW_SHIFT) |
 529                    (8 << VI6_CLK_DCSWT_CSTRW_SHIFT));
 530
 531         for (i = 0; i < vsp1->info->rpf_count; ++i)
 532                 vsp1_write(vsp1, VI6_DPR_RPF_ROUTE(i), VI6_DPR_NODE_UNUSED);
 533
 534         for (i = 0; i < vsp1->info->uds_count; ++i)
 535                 vsp1_write(vsp1, VI6_DPR_UDS_ROUTE(i), VI6_DPR_NODE_UNUSED);
 536
 537         for (i = 0; i < vsp1->info->uif_count; ++i)
 538                 vsp1_write(vsp1, VI6_DPR_UIF_ROUTE(i), VI6_DPR_NODE_UNUSED);
 539
 540         vsp1_write(vsp1, VI6_DPR_SRU_ROUTE, VI6_DPR_NODE_UNUSED);
 541         vsp1_write(vsp1, VI6_DPR_LUT_ROUTE, VI6_DPR_NODE_UNUSED);
 542         vsp1_write(vsp1, VI6_DPR_CLU_ROUTE, VI6_DPR_NODE_UNUSED);
 543         vsp1_write(vsp1, VI6_DPR_HST_ROUTE, VI6_DPR_NODE_UNUSED);
 544         vsp1_write(vsp1, VI6_DPR_HSI_ROUTE, VI6_DPR_NODE_UNUSED);
 545         vsp1_write(vsp1, VI6_DPR_BRU_ROUTE, VI6_DPR_NODE_UNUSED);
 546
 547         if (vsp1_feature(vsp1, VSP1_HAS_BRS))
 548                 vsp1_write(vsp1, VI6_DPR_ILV_BRS_ROUTE, VI6_DPR_NODE_UNUSED);
 549
 550         vsp1_write(vsp1, VI6_DPR_HGO_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) |
 551                    (VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
 552         vsp1_write(vsp1, VI6_DPR_HGT_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) |
 553                    (VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
 554
 555         vsp1_dlm_setup(vsp1);
 556
 557         return 0;
 558 }
 559
 560 static void vsp1_mask_all_interrupts(struct vsp1_device *vsp1)
 561 {
 562         unsigned int i;
 563
 564         for (i = 0; i < vsp1->info->lif_count; ++i)
 565                 vsp1_write(vsp1, VI6_DISP_IRQ_ENB(i), 0);
 566         for (i = 0; i < vsp1->info->wpf_count; ++i)
 567                 vsp1_write(vsp1, VI6_WPF_IRQ_ENB(i), 0);
 568 }
 569
 570 /*
 571  * vsp1_device_get - Acquire the VSP1 device
 572  *
 573  * Make sure the device is not suspended and initialize it if needed.
 574  *
 575  * Return 0 on success or a negative error code otherwise.
 576  */
 577 int vsp1_device_get(struct vsp1_device *vsp1)
 578 {
 579         return pm_runtime_resume_and_get(vsp1->dev);
 580 }
 581
 582 /*
 583  * vsp1_device_put - Release the VSP1 device
 584  *
 585  * Decrement the VSP1 reference count and cleanup the device if the last
 586  * reference is released.
 587  */
 588 void vsp1_device_put(struct vsp1_device *vsp1)
 589 {
 590         pm_runtime_put_sync(vsp1->dev);
 591 }
 592
 593 /* -----------------------------------------------------------------------------
 594  * Power Management
 595  */
 596
 597 static int __maybe_unused vsp1_pm_suspend(struct device *dev)
 598 {
 599         struct vsp1_device *vsp1 = dev_get_drvdata(dev);
 600
 601         /*
 602          * When used as part of a display pipeline, the VSP is stopped and
 603          * restarted explicitly by the DU.
 604          */
 605         if (!vsp1->drm)
 606                 vsp1_video_suspend(vsp1);
 607
 608         pm_runtime_force_suspend(vsp1->dev);
 609
 610         return 0;
 611 }
 612
 613 static int __maybe_unused vsp1_pm_resume(struct device *dev)
 614 {
 615         struct vsp1_device *vsp1 = dev_get_drvdata(dev);
 616
 617         pm_runtime_force_resume(vsp1->dev);
 618
 619         /*
 620          * When used as part of a display pipeline, the VSP is stopped and
 621          * restarted explicitly by the DU.
 622          */
 623         if (!vsp1->drm)
 624                 vsp1_video_resume(vsp1);
 625
 626         return 0;
 627 }
 628
 629 static int __maybe_unused vsp1_pm_runtime_suspend(struct device *dev)
 630 {
 631         struct vsp1_device *vsp1 = dev_get_drvdata(dev);
 632
 633         rcar_fcp_disable(vsp1->fcp);
 634         reset_control_assert(vsp1->rstc);
 635
 636         return 0;
 637 }
 638
 639 static int __maybe_unused vsp1_pm_runtime_resume(struct device *dev)
 640 {
 641         struct vsp1_device *vsp1 = dev_get_drvdata(dev);
 642         int ret;
 643
 644         ret = reset_control_deassert(vsp1->rstc);
 645         if (ret < 0)
 646                 return ret;
 647
 648         if (vsp1->info) {
 649                 /*
 650                  * On R-Car Gen2 and RZ/G1, vsp1 register access after deassert
 651                  * can cause lock-up. It is a special case and needs some delay
 652                  * to avoid this lock-up.
 653                  */
 654                 if (vsp1->info->gen == 2)
 655                         udelay(1);
 656
 657                 ret = vsp1_device_init(vsp1);
 658                 if (ret < 0)
 659                         goto done;
 660         }
 661
 662         ret = rcar_fcp_enable(vsp1->fcp);
 663
 664 done:
 665         if (ret < 0)
 666                 reset_control_assert(vsp1->rstc);
 667
 668         return ret;
 669 }
 670
 671 static const struct dev_pm_ops vsp1_pm_ops = {
 672         SET_SYSTEM_SLEEP_PM_OPS(vsp1_pm_suspend, vsp1_pm_resume)
 673         SET_RUNTIME_PM_OPS(vsp1_pm_runtime_suspend, vsp1_pm_runtime_resume, NULL)
 674 };
 675
 676 /* -----------------------------------------------------------------------------
 677  * Platform Driver
 678  */
 679
 680 static const struct vsp1_device_info vsp1_device_infos[] = {
 681         {
 682                 .version = VI6_IP_VERSION_MODEL_VSPS_H2,
 683                 .model = "VSP1-S",
 684                 .gen = 2,
 685                 .features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_HGO
 686                           | VSP1_HAS_HGT | VSP1_HAS_LUT | VSP1_HAS_SRU
 687                           | VSP1_HAS_WPF_VFLIP,
 688                 .rpf_count = 5,
 689                 .uds_count = 3,
 690                 .wpf_count = 4,
 691                 .num_bru_inputs = 4,
 692                 .uapi = true,
 693         }, {
 694                 .version = VI6_IP_VERSION_MODEL_VSPR_H2,
 695                 .model = "VSP1-R",
 696                 .gen = 2,
 697                 .features = VSP1_HAS_BRU | VSP1_HAS_SRU | VSP1_HAS_WPF_VFLIP,
 698                 .rpf_count = 5,
 699                 .uds_count = 3,
 700                 .wpf_count = 4,
 701                 .num_bru_inputs = 4,
 702                 .uapi = true,
 703         }, {
 704                 .version = VI6_IP_VERSION_MODEL_VSPD_GEN2,
 705                 .model = "VSP1-D",
 706                 .gen = 2,
 707                 .features = VSP1_HAS_BRU | VSP1_HAS_HGO | VSP1_HAS_LUT,
 708                 .lif_count = 1,
 709                 .rpf_count = 4,
 710                 .uds_count = 1,
 711                 .wpf_count = 1,
 712                 .num_bru_inputs = 4,
 713                 .uapi = true,
 714         }, {
 715                 .version = VI6_IP_VERSION_MODEL_VSPS_M2,
 716                 .model = "VSP1-S",
 717                 .gen = 2,
 718                 .features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_HGO
 719                           | VSP1_HAS_HGT | VSP1_HAS_LUT | VSP1_HAS_SRU
 720                           | VSP1_HAS_WPF_VFLIP,
 721                 .rpf_count = 5,
 722                 .uds_count = 1,
 723                 .wpf_count = 4,
 724                 .num_bru_inputs = 4,
 725                 .uapi = true,
 726         }, {
 727                 .version = VI6_IP_VERSION_MODEL_VSPS_V2H,
 728                 .model = "VSP1V-S",
 729                 .gen = 2,
 730                 .features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_LUT
 731                           | VSP1_HAS_SRU | VSP1_HAS_WPF_VFLIP,
 732                 .rpf_count = 4,
 733                 .uds_count = 1,
 734                 .wpf_count = 4,
 735                 .num_bru_inputs = 4,
 736                 .uapi = true,
 737         }, {
 738                 .version = VI6_IP_VERSION_MODEL_VSPD_V2H,
 739                 .model = "VSP1V-D",
 740                 .gen = 2,
 741                 .features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_LUT,
 742                 .lif_count = 1,
 743                 .rpf_count = 4,
 744                 .uds_count = 1,
 745                 .wpf_count = 1,
 746                 .num_bru_inputs = 4,
 747                 .uapi = true,
 748         }, {
 749                 .version = VI6_IP_VERSION_MODEL_VSPI_GEN3,
 750                 .model = "VSP2-I",
 751                 .gen = 3,
 752                 .features = VSP1_HAS_CLU | VSP1_HAS_HGO | VSP1_HAS_HGT
 753                           | VSP1_HAS_LUT | VSP1_HAS_SRU | VSP1_HAS_WPF_HFLIP
 754                           | VSP1_HAS_WPF_VFLIP,
 755                 .rpf_count = 1,
 756                 .uds_count = 1,
 757                 .wpf_count = 1,
 758                 .uapi = true,
 759         }, {
 760                 .version = VI6_IP_VERSION_MODEL_VSPBD_GEN3,
 761                 .model = "VSP2-BD",
 762                 .gen = 3,
 763                 .features = VSP1_HAS_BRU | VSP1_HAS_WPF_VFLIP,
 764                 .rpf_count = 5,
 765                 .wpf_count = 1,
 766                 .num_bru_inputs = 5,
 767                 .uapi = true,
 768         }, {
 769                 .version = VI6_IP_VERSION_MODEL_VSPBC_GEN3,
 770                 .model = "VSP2-BC",
 771                 .gen = 3,
 772                 .features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_HGO
 773                           | VSP1_HAS_LUT | VSP1_HAS_WPF_VFLIP,
 774                 .rpf_count = 5,
 775                 .wpf_count = 1,
 776                 .num_bru_inputs = 5,
 777                 .uapi = true,
 778         }, {
 779                 .version = VI6_IP_VERSION_MODEL_VSPBS_GEN3,
 780                 .model = "VSP2-BS",
 781                 .gen = 3,
 782                 .features = VSP1_HAS_BRS | VSP1_HAS_WPF_VFLIP,
 783                 .rpf_count = 2,
 784                 .wpf_count = 1,
 785                 .uapi = true,
 786         }, {
 787                 .version = VI6_IP_VERSION_MODEL_VSPD_GEN3,
 788                 .model = "VSP2-D",
 789                 .gen = 3,
 790                 .features = VSP1_HAS_BRU | VSP1_HAS_WPF_VFLIP | VSP1_HAS_EXT_DL,
 791                 .lif_count = 1,
 792                 .rpf_count = 5,
 793                 .uif_count = 1,
 794                 .wpf_count = 2,
 795                 .num_bru_inputs = 5,
 796         }, {
 797                 .version = VI6_IP_VERSION_MODEL_VSPD_V3,
 798                 .model = "VSP2-D",
 799                 .soc = VI6_IP_VERSION_SOC_V3H,
 800                 .gen = 3,
 801                 .features = VSP1_HAS_BRS | VSP1_HAS_BRU,
 802                 .lif_count = 1,
 803                 .rpf_count = 5,
 804                 .uif_count = 1,
 805                 .wpf_count = 1,
 806                 .num_bru_inputs = 5,
 807         }, {
 808                 .version = VI6_IP_VERSION_MODEL_VSPD_V3,
 809                 .model = "VSP2-D",
 810                 .soc = VI6_IP_VERSION_SOC_V3M,
 811                 .gen = 3,
 812                 .features = VSP1_HAS_BRS | VSP1_HAS_BRU | VSP1_HAS_NON_ZERO_LBA,
 813                 .lif_count = 1,
 814                 .rpf_count = 5,
 815                 .uif_count = 1,
 816                 .wpf_count = 1,
 817                 .num_bru_inputs = 5,
 818         }, {
 819                 .version = VI6_IP_VERSION_MODEL_VSPDL_GEN3,
 820                 .model = "VSP2-DL",
 821                 .gen = 3,
 822                 .features = VSP1_HAS_BRS | VSP1_HAS_BRU | VSP1_HAS_EXT_DL,
 823                 .lif_count = 2,
 824                 .rpf_count = 5,
 825                 .uif_count = 2,
 826                 .wpf_count = 2,
 827                 .num_bru_inputs = 5,
 828         }, {
 829                 .version = VI6_IP_VERSION_MODEL_VSPD_GEN4,
 830                 .model = "VSP2-D",
 831                 .gen = 4,
 832                 .features = VSP1_HAS_BRU | VSP1_HAS_EXT_DL,
 833                 .lif_count = 1,
 834                 .rpf_count = 5,
 835                 .uif_count = 2,
 836                 .wpf_count = 1,
 837                 .num_bru_inputs = 5,
 838         },
 839 };
 840
 841 static const struct vsp1_device_info rzg2l_vsp2_device_info = {
 842         .version = VI6_IP_VERSION_MODEL_VSPD_RZG2L,
 843         .model = "VSP2-D",
 844         .soc = VI6_IP_VERSION_SOC_RZG2L,
 845         .gen = 3,
 846         .features = VSP1_HAS_BRS | VSP1_HAS_WPF_VFLIP | VSP1_HAS_EXT_DL
 847                   | VSP1_HAS_NON_ZERO_LBA,
 848         .lif_count = 1,
 849         .rpf_count = 2,
 850         .wpf_count = 1,
 851 };
 852
 853 static const struct vsp1_device_info *vsp1_lookup_info(struct vsp1_device *vsp1)
 854 {
 855         const struct vsp1_device_info *info;
 856         unsigned int i;
 857         u32 model;
 858         u32 soc;
 859
 860         /*
 861          * Try the info stored in match data first for devices that don't have
 862          * a version register.
 863          */
 864         info = of_device_get_match_data(vsp1->dev);
 865         if (info) {
 866                 vsp1->version = VI6_IP_VERSION_VSP_SW | info->version | info->soc;
 867                 return info;
 868         }
 869
 870         vsp1->version = vsp1_read(vsp1, VI6_IP_VERSION);
 871         model = vsp1->version & VI6_IP_VERSION_MODEL_MASK;
 872         soc = vsp1->version & VI6_IP_VERSION_SOC_MASK;
 873
 874         for (i = 0; i < ARRAY_SIZE(vsp1_device_infos); ++i) {
 875                 info = &vsp1_device_infos[i];
 876
 877                 if (model == info->version && (!info->soc || soc == info->soc))
 878                         return info;
 879         }
 880
 881         dev_err(vsp1->dev, "unsupported IP version 0x%08x\n", vsp1->version);
 882
 883         return NULL;
 884 }
 885
 886 static int vsp1_probe(struct platform_device *pdev)
 887 {
 888         struct vsp1_device *vsp1;
 889         struct device_node *fcp_node;
 890         int ret;
 891         int irq;
 892
 893         vsp1 = devm_kzalloc(&pdev->dev, sizeof(*vsp1), GFP_KERNEL);
 894         if (vsp1 == NULL)
 895                 return -ENOMEM;
 896
 897         vsp1->dev = &pdev->dev;
 898         INIT_LIST_HEAD(&vsp1->entities);
 899         INIT_LIST_HEAD(&vsp1->videos);
 900
 901         platform_set_drvdata(pdev, vsp1);
 902
 903         /* I/O and IRQ resources (clock managed by the clock PM domain). */
 904         vsp1->mmio = devm_platform_ioremap_resource(pdev, 0);
 905         if (IS_ERR(vsp1->mmio))
 906                 return PTR_ERR(vsp1->mmio);
 907
 908         irq = platform_get_irq(pdev, 0);
 909         if (irq < 0)
 910                 return irq;
 911
 912         vsp1->rstc = devm_reset_control_get_shared(&pdev->dev, NULL);
 913         if (IS_ERR(vsp1->rstc))
 914                 return dev_err_probe(&pdev->dev, PTR_ERR(vsp1->rstc),
 915                                      "failed to get reset control\n");
 916
 917         /* FCP (optional). */
 918         fcp_node = of_parse_phandle(pdev->dev.of_node, "renesas,fcp", 0);
 919         if (fcp_node) {
 920                 vsp1->fcp = rcar_fcp_get(fcp_node);
 921                 of_node_put(fcp_node);
 922                 if (IS_ERR(vsp1->fcp)) {
 923                         dev_dbg(&pdev->dev, "FCP not found (%ld)\n",
 924                                 PTR_ERR(vsp1->fcp));
 925                         return PTR_ERR(vsp1->fcp);
 926                 }
 927
 928                 /*
 929                  * When the FCP is present, it handles all bus master accesses
 930                  * for the VSP and must thus be used in place of the VSP device
 931                  * to map DMA buffers.
 932                  */
 933                 vsp1->bus_master = rcar_fcp_get_device(vsp1->fcp);
 934         } else {
 935                 vsp1->bus_master = vsp1->dev;
 936         }
 937
 938         /* Configure device parameters based on the version register. */
 939         pm_runtime_enable(&pdev->dev);
 940
 941         ret = vsp1_device_get(vsp1);
 942         if (ret < 0)
 943                 goto done;
 944
 945         vsp1->info = vsp1_lookup_info(vsp1);
 946         if (!vsp1->info) {
 947                 vsp1_device_put(vsp1);
 948                 ret = -ENXIO;
 949                 goto done;
 950         }
 951
 952         dev_dbg(&pdev->dev, "IP version 0x%08x\n", vsp1->version);
 953
 954         /*
 955          * Previous use of the hardware (e.g. by the bootloader) could leave
 956          * some interrupts enabled and pending.
 957          *
 958          * TODO: Investigate if this shouldn't be better handled by using the
 959          * device reset provided by the CPG.
 960          */
 961         vsp1_mask_all_interrupts(vsp1);
 962
 963         vsp1_device_put(vsp1);
 964
 965         ret = devm_request_irq(&pdev->dev, irq, vsp1_irq_handler,
 966                                IRQF_SHARED, dev_name(&pdev->dev), vsp1);
 967         if (ret < 0) {
 968                 dev_err(&pdev->dev, "failed to request IRQ\n");
 969                 goto done;
 970         }
 971
 972         /* Instantiate entities. */
 973         ret = vsp1_create_entities(vsp1);
 974         if (ret < 0) {
 975                 dev_err(&pdev->dev, "failed to create entities\n");
 976                 goto done;
 977         }
 978
 979 done:
 980         if (ret) {
 981                 pm_runtime_disable(&pdev->dev);
 982                 rcar_fcp_put(vsp1->fcp);
 983         }
 984
 985         return ret;
 986 }
 987
 988 static void vsp1_remove(struct platform_device *pdev)
 989 {
 990         struct vsp1_device *vsp1 = platform_get_drvdata(pdev);
 991
 992         vsp1_destroy_entities(vsp1);
 993         rcar_fcp_put(vsp1->fcp);
 994
 995         pm_runtime_disable(&pdev->dev);
 996 }
 997
 998 static const struct of_device_id vsp1_of_match[] = {
 999         { .compatible = "renesas,vsp1" },
1000         { .compatible = "renesas,vsp2" },
1001         { .compatible = "renesas,r9a07g044-vsp2", .data = &rzg2l_vsp2_device_info },
1002         { },
1003 };
1004 MODULE_DEVICE_TABLE(of, vsp1_of_match);
1005
1006 static struct platform_driver vsp1_platform_driver = {
1007         .probe          = vsp1_probe,
1008         .remove         = vsp1_remove,
1009         .driver         = {
1010                 .name   = "vsp1",
1011                 .pm     = &vsp1_pm_ops,
1012                 .of_match_table = vsp1_of_match,
1013         },
1014 };
1015
1016 module_platform_driver(vsp1_platform_driver);
1017
1018 MODULE_ALIAS("vsp1");
1019 MODULE_AUTHOR("Laurent Pinchart <[email protected]>");
1020 MODULE_DESCRIPTION("Renesas VSP1 Driver");
1021 MODULE_LICENSE("GPL");