drivers/media/platform/vsp1/vsp1_wpf.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * vsp1_wpf.c  --  R-Car VSP1 Write Pixel Formatter
   4  *
   5  * Copyright (C) 2013-2014 Renesas Electronics Corporation
   6  *
   7  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   8  */
   9
  10 #include <linux/device.h>
  11
  12 #include <media/v4l2-subdev.h>
  13
  14 #include "vsp1.h"
  15 #include "vsp1_dl.h"
  16 #include "vsp1_pipe.h"
  17 #include "vsp1_rwpf.h"
  18 #include "vsp1_video.h"
  19
  20 #define WPF_GEN2_MAX_WIDTH                      2048U
  21 #define WPF_GEN2_MAX_HEIGHT                     2048U
  22 #define WPF_GEN3_MAX_WIDTH                      8190U
  23 #define WPF_GEN3_MAX_HEIGHT                     8190U
  24
  25 /* -----------------------------------------------------------------------------
  26  * Device Access
  27  */
  28
  29 static inline void vsp1_wpf_write(struct vsp1_rwpf *wpf,
  30                                   struct vsp1_dl_body *dlb, u32 reg, u32 data)
  31 {
  32         vsp1_dl_body_write(dlb, reg + wpf->entity.index * VI6_WPF_OFFSET, data);
  33 }
  34
  35 /* -----------------------------------------------------------------------------
  36  * Controls
  37  */
  38
  39 enum wpf_flip_ctrl {
  40         WPF_CTRL_VFLIP = 0,
  41         WPF_CTRL_HFLIP = 1,
  42 };
  43
  44 static int vsp1_wpf_set_rotation(struct vsp1_rwpf *wpf, unsigned int rotation)
  45 {
  46         struct vsp1_video *video = wpf->video;
  47         struct v4l2_mbus_framefmt *sink_format;
  48         struct v4l2_mbus_framefmt *source_format;
  49         bool rotate;
  50         int ret = 0;
  51
  52         /*
  53          * Only consider the 0°/180° from/to 90°/270° modifications, the rest
  54          * is taken care of by the flipping configuration.
  55          */
  56         rotate = rotation == 90 || rotation == 270;
  57         if (rotate == wpf->flip.rotate)
  58                 return 0;
  59
  60         /* Changing rotation isn't allowed when buffers are allocated. */
  61         mutex_lock(&video->lock);
  62
  63         if (vb2_is_busy(&video->queue)) {
  64                 ret = -EBUSY;
  65                 goto done;
  66         }
  67
  68         sink_format = vsp1_entity_get_pad_format(&wpf->entity,
  69                                                  wpf->entity.config,
  70                                                  RWPF_PAD_SINK);
  71         source_format = vsp1_entity_get_pad_format(&wpf->entity,
  72                                                    wpf->entity.config,
  73                                                    RWPF_PAD_SOURCE);
  74
  75         mutex_lock(&wpf->entity.lock);
  76
  77         if (rotate) {
  78                 source_format->width = sink_format->height;
  79                 source_format->height = sink_format->width;
  80         } else {
  81                 source_format->width = sink_format->width;
  82                 source_format->height = sink_format->height;
  83         }
  84
  85         wpf->flip.rotate = rotate;
  86
  87         mutex_unlock(&wpf->entity.lock);
  88
  89 done:
  90         mutex_unlock(&video->lock);
  91         return ret;
  92 }
  93
  94 static int vsp1_wpf_s_ctrl(struct v4l2_ctrl *ctrl)
  95 {
  96         struct vsp1_rwpf *wpf =
  97                 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
  98         unsigned int rotation;
  99         u32 flip = 0;
 100         int ret;
 101
 102         /* Update the rotation. */
 103         rotation = wpf->flip.ctrls.rotate ? wpf->flip.ctrls.rotate->val : 0;
 104         ret = vsp1_wpf_set_rotation(wpf, rotation);
 105         if (ret < 0)
 106                 return ret;
 107
 108         /*
 109          * Compute the flip value resulting from all three controls, with
 110          * rotation by 180° flipping the image in both directions. Store the
 111          * result in the pending flip field for the next frame that will be
 112          * processed.
 113          */
 114         if (wpf->flip.ctrls.vflip->val)
 115                 flip |= BIT(WPF_CTRL_VFLIP);
 116
 117         if (wpf->flip.ctrls.hflip && wpf->flip.ctrls.hflip->val)
 118                 flip |= BIT(WPF_CTRL_HFLIP);
 119
 120         if (rotation == 180 || rotation == 270)
 121                 flip ^= BIT(WPF_CTRL_VFLIP) | BIT(WPF_CTRL_HFLIP);
 122
 123         spin_lock_irq(&wpf->flip.lock);
 124         wpf->flip.pending = flip;
 125         spin_unlock_irq(&wpf->flip.lock);
 126
 127         return 0;
 128 }
 129
 130 static const struct v4l2_ctrl_ops vsp1_wpf_ctrl_ops = {
 131         .s_ctrl = vsp1_wpf_s_ctrl,
 132 };
 133
 134 static int wpf_init_controls(struct vsp1_rwpf *wpf)
 135 {
 136         struct vsp1_device *vsp1 = wpf->entity.vsp1;
 137         unsigned int num_flip_ctrls;
 138
 139         spin_lock_init(&wpf->flip.lock);
 140
 141         if (wpf->entity.index != 0) {
 142                 /* Only WPF0 supports flipping. */
 143                 num_flip_ctrls = 0;
 144         } else if (vsp1_feature(vsp1, VSP1_HAS_WPF_HFLIP)) {
 145                 /*
 146                  * When horizontal flip is supported the WPF implements three
 147                  * controls (horizontal flip, vertical flip and rotation).
 148                  */
 149                 num_flip_ctrls = 3;
 150         } else if (vsp1_feature(vsp1, VSP1_HAS_WPF_VFLIP)) {
 151                 /*
 152                  * When only vertical flip is supported the WPF implements a
 153                  * single control (vertical flip).
 154                  */
 155                 num_flip_ctrls = 1;
 156         } else {
 157                 /* Otherwise flipping is not supported. */
 158                 num_flip_ctrls = 0;
 159         }
 160
 161         vsp1_rwpf_init_ctrls(wpf, num_flip_ctrls);
 162
 163         if (num_flip_ctrls >= 1) {
 164                 wpf->flip.ctrls.vflip =
 165                         v4l2_ctrl_new_std(&wpf->ctrls, &vsp1_wpf_ctrl_ops,
 166                                           V4L2_CID_VFLIP, 0, 1, 1, 0);
 167         }
 168
 169         if (num_flip_ctrls == 3) {
 170                 wpf->flip.ctrls.hflip =
 171                         v4l2_ctrl_new_std(&wpf->ctrls, &vsp1_wpf_ctrl_ops,
 172                                           V4L2_CID_HFLIP, 0, 1, 1, 0);
 173                 wpf->flip.ctrls.rotate =
 174                         v4l2_ctrl_new_std(&wpf->ctrls, &vsp1_wpf_ctrl_ops,
 175                                           V4L2_CID_ROTATE, 0, 270, 90, 0);
 176                 v4l2_ctrl_cluster(3, &wpf->flip.ctrls.vflip);
 177         }
 178
 179         if (wpf->ctrls.error) {
 180                 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
 181                         wpf->entity.index);
 182                 return wpf->ctrls.error;
 183         }
 184
 185         return 0;
 186 }
 187
 188 /* -----------------------------------------------------------------------------
 189  * V4L2 Subdevice Core Operations
 190  */
 191
 192 static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
 193 {
 194         struct vsp1_rwpf *wpf = to_rwpf(subdev);
 195         struct vsp1_device *vsp1 = wpf->entity.vsp1;
 196
 197         if (enable)
 198                 return 0;
 199
 200         /*
 201          * Write to registers directly when stopping the stream as there will be
 202          * no pipeline run to apply the display list.
 203          */
 204         vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
 205         vsp1_write(vsp1, wpf->entity.index * VI6_WPF_OFFSET +
 206                    VI6_WPF_SRCRPF, 0);
 207
 208         return 0;
 209 }
 210
 211 /* -----------------------------------------------------------------------------
 212  * V4L2 Subdevice Operations
 213  */
 214
 215 static const struct v4l2_subdev_video_ops wpf_video_ops = {
 216         .s_stream = wpf_s_stream,
 217 };
 218
 219 static const struct v4l2_subdev_ops wpf_ops = {
 220         .video  = &wpf_video_ops,
 221         .pad    = &vsp1_rwpf_pad_ops,
 222 };
 223
 224 /* -----------------------------------------------------------------------------
 225  * VSP1 Entity Operations
 226  */
 227
 228 static void vsp1_wpf_destroy(struct vsp1_entity *entity)
 229 {
 230         struct vsp1_rwpf *wpf = entity_to_rwpf(entity);
 231
 232         vsp1_dlm_destroy(wpf->dlm);
 233 }
 234
 235 static void wpf_configure_stream(struct vsp1_entity *entity,
 236                                  struct vsp1_pipeline *pipe,
 237                                  struct vsp1_dl_body *dlb)
 238 {
 239         struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
 240         struct vsp1_device *vsp1 = wpf->entity.vsp1;
 241         const struct v4l2_mbus_framefmt *source_format;
 242         const struct v4l2_mbus_framefmt *sink_format;
 243         unsigned int i;
 244         u32 outfmt = 0;
 245         u32 srcrpf = 0;
 246
 247         sink_format = vsp1_entity_get_pad_format(&wpf->entity,
 248                                                  wpf->entity.config,
 249                                                  RWPF_PAD_SINK);
 250         source_format = vsp1_entity_get_pad_format(&wpf->entity,
 251                                                    wpf->entity.config,
 252                                                    RWPF_PAD_SOURCE);
 253         /* Format */
 254         if (!pipe->lif) {
 255                 const struct v4l2_pix_format_mplane *format = &wpf->format;
 256                 const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
 257
 258                 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
 259
 260                 if (wpf->flip.rotate)
 261                         outfmt |= VI6_WPF_OUTFMT_ROT;
 262
 263                 if (fmtinfo->alpha)
 264                         outfmt |= VI6_WPF_OUTFMT_PXA;
 265                 if (fmtinfo->swap_yc)
 266                         outfmt |= VI6_WPF_OUTFMT_SPYCS;
 267                 if (fmtinfo->swap_uv)
 268                         outfmt |= VI6_WPF_OUTFMT_SPUVS;
 269
 270                 /* Destination stride and byte swapping. */
 271                 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_STRIDE_Y,
 272                                format->plane_fmt[0].bytesperline);
 273                 if (format->num_planes > 1)
 274                         vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_STRIDE_C,
 275                                        format->plane_fmt[1].bytesperline);
 276
 277                 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSWAP, fmtinfo->swap);
 278
 279                 if (vsp1_feature(vsp1, VSP1_HAS_WPF_HFLIP) &&
 280                     wpf->entity.index == 0)
 281                         vsp1_wpf_write(wpf, dlb, VI6_WPF_ROT_CTRL,
 282                                        VI6_WPF_ROT_CTRL_LN16 |
 283                                        (256 << VI6_WPF_ROT_CTRL_LMEM_WD_SHIFT));
 284         }
 285
 286         if (sink_format->code != source_format->code)
 287                 outfmt |= VI6_WPF_OUTFMT_CSC;
 288
 289         wpf->outfmt = outfmt;
 290
 291         vsp1_dl_body_write(dlb, VI6_DPR_WPF_FPORCH(wpf->entity.index),
 292                            VI6_DPR_WPF_FPORCH_FP_WPFN);
 293
 294         vsp1_dl_body_write(dlb, VI6_WPF_WRBCK_CTRL, 0);
 295
 296         /*
 297          * Sources. If the pipeline has a single input and BRx is not used,
 298          * configure it as the master layer. Otherwise configure all
 299          * inputs as sub-layers and select the virtual RPF as the master
 300          * layer.
 301          */
 302         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 303                 struct vsp1_rwpf *input = pipe->inputs[i];
 304
 305                 if (!input)
 306                         continue;
 307
 308                 srcrpf |= (!pipe->brx && pipe->num_inputs == 1)
 309                         ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
 310                         : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
 311         }
 312
 313         if (pipe->brx)
 314                 srcrpf |= pipe->brx->type == VSP1_ENTITY_BRU
 315                         ? VI6_WPF_SRCRPF_VIRACT_MST
 316                         : VI6_WPF_SRCRPF_VIRACT2_MST;
 317
 318         vsp1_wpf_write(wpf, dlb, VI6_WPF_SRCRPF, srcrpf);
 319
 320         /* Enable interrupts */
 321         vsp1_dl_body_write(dlb, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
 322         vsp1_dl_body_write(dlb, VI6_WPF_IRQ_ENB(wpf->entity.index),
 323                            VI6_WFP_IRQ_ENB_DFEE);
 324 }
 325
 326 static void wpf_configure_frame(struct vsp1_entity *entity,
 327                                 struct vsp1_pipeline *pipe,
 328                                 struct vsp1_dl_list *dl,
 329                                 struct vsp1_dl_body *dlb)
 330 {
 331         const unsigned int mask = BIT(WPF_CTRL_VFLIP)
 332                                 | BIT(WPF_CTRL_HFLIP);
 333         struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
 334         unsigned long flags;
 335         u32 outfmt;
 336
 337         spin_lock_irqsave(&wpf->flip.lock, flags);
 338         wpf->flip.active = (wpf->flip.active & ~mask)
 339                          | (wpf->flip.pending & mask);
 340         spin_unlock_irqrestore(&wpf->flip.lock, flags);
 341
 342         outfmt = (wpf->alpha << VI6_WPF_OUTFMT_PDV_SHIFT) | wpf->outfmt;
 343
 344         if (wpf->flip.active & BIT(WPF_CTRL_VFLIP))
 345                 outfmt |= VI6_WPF_OUTFMT_FLP;
 346         if (wpf->flip.active & BIT(WPF_CTRL_HFLIP))
 347                 outfmt |= VI6_WPF_OUTFMT_HFLP;
 348
 349         vsp1_wpf_write(wpf, dlb, VI6_WPF_OUTFMT, outfmt);
 350 }
 351
 352 static void wpf_configure_partition(struct vsp1_entity *entity,
 353                                     struct vsp1_pipeline *pipe,
 354                                     struct vsp1_dl_list *dl,
 355                                     struct vsp1_dl_body *dlb)
 356 {
 357         struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
 358         struct vsp1_device *vsp1 = wpf->entity.vsp1;
 359         struct vsp1_rwpf_memory mem = wpf->mem;
 360         const struct v4l2_mbus_framefmt *sink_format;
 361         const struct v4l2_pix_format_mplane *format = &wpf->format;
 362         const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
 363         unsigned int width;
 364         unsigned int height;
 365         unsigned int offset;
 366         unsigned int flip;
 367         unsigned int i;
 368
 369         sink_format = vsp1_entity_get_pad_format(&wpf->entity,
 370                                                  wpf->entity.config,
 371                                                  RWPF_PAD_SINK);
 372         width = sink_format->width;
 373         height = sink_format->height;
 374
 375         /*
 376          * Cropping. The partition algorithm can split the image into
 377          * multiple slices.
 378          */
 379         if (pipe->partitions > 1)
 380                 width = pipe->partition->wpf.width;
 381
 382         vsp1_wpf_write(wpf, dlb, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
 383                        (0 << VI6_WPF_SZCLIP_OFST_SHIFT) |
 384                        (width << VI6_WPF_SZCLIP_SIZE_SHIFT));
 385         vsp1_wpf_write(wpf, dlb, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
 386                        (0 << VI6_WPF_SZCLIP_OFST_SHIFT) |
 387                        (height << VI6_WPF_SZCLIP_SIZE_SHIFT));
 388
 389         if (pipe->lif)
 390                 return;
 391
 392         /*
 393          * Update the memory offsets based on flipping configuration.
 394          * The destination addresses point to the locations where the
 395          * VSP starts writing to memory, which can be any corner of the
 396          * image depending on the combination of flipping and rotation.
 397          */
 398
 399         /*
 400          * First take the partition left coordinate into account.
 401          * Compute the offset to order the partitions correctly on the
 402          * output based on whether flipping is enabled. Consider
 403          * horizontal flipping when rotation is disabled but vertical
 404          * flipping when rotation is enabled, as rotating the image
 405          * switches the horizontal and vertical directions. The offset
 406          * is applied horizontally or vertically accordingly.
 407          */
 408         flip = wpf->flip.active;
 409
 410         if (flip & BIT(WPF_CTRL_HFLIP) && !wpf->flip.rotate)
 411                 offset = format->width - pipe->partition->wpf.left
 412                         - pipe->partition->wpf.width;
 413         else if (flip & BIT(WPF_CTRL_VFLIP) && wpf->flip.rotate)
 414                 offset = format->height - pipe->partition->wpf.left
 415                         - pipe->partition->wpf.width;
 416         else
 417                 offset = pipe->partition->wpf.left;
 418
 419         for (i = 0; i < format->num_planes; ++i) {
 420                 unsigned int hsub = i > 0 ? fmtinfo->hsub : 1;
 421                 unsigned int vsub = i > 0 ? fmtinfo->vsub : 1;
 422
 423                 if (wpf->flip.rotate)
 424                         mem.addr[i] += offset / vsub
 425                                      * format->plane_fmt[i].bytesperline;
 426                 else
 427                         mem.addr[i] += offset / hsub
 428                                      * fmtinfo->bpp[i] / 8;
 429         }
 430
 431         if (flip & BIT(WPF_CTRL_VFLIP)) {
 432                 /*
 433                  * When rotating the output (after rotation) image
 434                  * height is equal to the partition width (before
 435                  * rotation). Otherwise it is equal to the output
 436                  * image height.
 437                  */
 438                 if (wpf->flip.rotate)
 439                         height = pipe->partition->wpf.width;
 440                 else
 441                         height = format->height;
 442
 443                 mem.addr[0] += (height - 1)
 444                              * format->plane_fmt[0].bytesperline;
 445
 446                 if (format->num_planes > 1) {
 447                         offset = (height / fmtinfo->vsub - 1)
 448                                * format->plane_fmt[1].bytesperline;
 449                         mem.addr[1] += offset;
 450                         mem.addr[2] += offset;
 451                 }
 452         }
 453
 454         if (wpf->flip.rotate && !(flip & BIT(WPF_CTRL_HFLIP))) {
 455                 unsigned int hoffset = max(0, (int)format->width - 16);
 456
 457                 /*
 458                  * Compute the output coordinate. The partition
 459                  * horizontal (left) offset becomes a vertical offset.
 460                  */
 461                 for (i = 0; i < format->num_planes; ++i) {
 462                         unsigned int hsub = i > 0 ? fmtinfo->hsub : 1;
 463
 464                         mem.addr[i] += hoffset / hsub
 465                                      * fmtinfo->bpp[i] / 8;
 466                 }
 467         }
 468
 469         /*
 470          * On Gen3 hardware the SPUVS bit has no effect on 3-planar
 471          * formats. Swap the U and V planes manually in that case.
 472          */
 473         if (vsp1->info->gen == 3 && format->num_planes == 3 &&
 474             fmtinfo->swap_uv)
 475                 swap(mem.addr[1], mem.addr[2]);
 476
 477         vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_ADDR_Y, mem.addr[0]);
 478         vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_ADDR_C0, mem.addr[1]);
 479         vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_ADDR_C1, mem.addr[2]);
 480 }
 481
 482 static unsigned int wpf_max_width(struct vsp1_entity *entity,
 483                                   struct vsp1_pipeline *pipe)
 484 {
 485         struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
 486
 487         return wpf->flip.rotate ? 256 : wpf->max_width;
 488 }
 489
 490 static void wpf_partition(struct vsp1_entity *entity,
 491                           struct vsp1_pipeline *pipe,
 492                           struct vsp1_partition *partition,
 493                           unsigned int partition_idx,
 494                           struct vsp1_partition_window *window)
 495 {
 496         partition->wpf = *window;
 497 }
 498
 499 static const struct vsp1_entity_operations wpf_entity_ops = {
 500         .destroy = vsp1_wpf_destroy,
 501         .configure_stream = wpf_configure_stream,
 502         .configure_frame = wpf_configure_frame,
 503         .configure_partition = wpf_configure_partition,
 504         .max_width = wpf_max_width,
 505         .partition = wpf_partition,
 506 };
 507
 508 /* -----------------------------------------------------------------------------
 509  * Initialization and Cleanup
 510  */
 511
 512 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
 513 {
 514         struct vsp1_rwpf *wpf;
 515         char name[6];
 516         int ret;
 517
 518         wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
 519         if (wpf == NULL)
 520                 return ERR_PTR(-ENOMEM);
 521
 522         if (vsp1->info->gen == 2) {
 523                 wpf->max_width = WPF_GEN2_MAX_WIDTH;
 524                 wpf->max_height = WPF_GEN2_MAX_HEIGHT;
 525         } else {
 526                 wpf->max_width = WPF_GEN3_MAX_WIDTH;
 527                 wpf->max_height = WPF_GEN3_MAX_HEIGHT;
 528         }
 529
 530         wpf->entity.ops = &wpf_entity_ops;
 531         wpf->entity.type = VSP1_ENTITY_WPF;
 532         wpf->entity.index = index;
 533
 534         sprintf(name, "wpf.%u", index);
 535         ret = vsp1_entity_init(vsp1, &wpf->entity, name, 2, &wpf_ops,
 536                                MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);
 537         if (ret < 0)
 538                 return ERR_PTR(ret);
 539
 540         /* Initialize the display list manager. */
 541         wpf->dlm = vsp1_dlm_create(vsp1, index, 64);
 542         if (!wpf->dlm) {
 543                 ret = -ENOMEM;
 544                 goto error;
 545         }
 546
 547         /* Initialize the control handler. */
 548         ret = wpf_init_controls(wpf);
 549         if (ret < 0) {
 550                 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
 551                         index);
 552                 goto error;
 553         }
 554
 555         v4l2_ctrl_handler_setup(&wpf->ctrls);
 556
 557         return wpf;
 558
 559 error:
 560         vsp1_entity_destroy(&wpf->entity);
 561         return ERR_PTR(ret);
 562 }