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_list *dl,
 238                                  struct vsp1_dl_body *dlb)
 239 {
 240         struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
 241         struct vsp1_device *vsp1 = wpf->entity.vsp1;
 242         const struct v4l2_mbus_framefmt *source_format;
 243         const struct v4l2_mbus_framefmt *sink_format;
 244         unsigned int i;
 245         u32 outfmt = 0;
 246         u32 srcrpf = 0;
 247
 248         sink_format = vsp1_entity_get_pad_format(&wpf->entity,
 249                                                  wpf->entity.config,
 250                                                  RWPF_PAD_SINK);
 251         source_format = vsp1_entity_get_pad_format(&wpf->entity,
 252                                                    wpf->entity.config,
 253                                                    RWPF_PAD_SOURCE);
 254         /* Format */
 255         if (!pipe->lif) {
 256                 const struct v4l2_pix_format_mplane *format = &wpf->format;
 257                 const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
 258
 259                 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
 260
 261                 if (wpf->flip.rotate)
 262                         outfmt |= VI6_WPF_OUTFMT_ROT;
 263
 264                 if (fmtinfo->alpha)
 265                         outfmt |= VI6_WPF_OUTFMT_PXA;
 266                 if (fmtinfo->swap_yc)
 267                         outfmt |= VI6_WPF_OUTFMT_SPYCS;
 268                 if (fmtinfo->swap_uv)
 269                         outfmt |= VI6_WPF_OUTFMT_SPUVS;
 270
 271                 /* Destination stride and byte swapping. */
 272                 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_STRIDE_Y,
 273                                format->plane_fmt[0].bytesperline);
 274                 if (format->num_planes > 1)
 275                         vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_STRIDE_C,
 276                                        format->plane_fmt[1].bytesperline);
 277
 278                 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSWAP, fmtinfo->swap);
 279
 280                 if (vsp1_feature(vsp1, VSP1_HAS_WPF_HFLIP) &&
 281                     wpf->entity.index == 0)
 282                         vsp1_wpf_write(wpf, dlb, VI6_WPF_ROT_CTRL,
 283                                        VI6_WPF_ROT_CTRL_LN16 |
 284                                        (256 << VI6_WPF_ROT_CTRL_LMEM_WD_SHIFT));
 285         }
 286
 287         if (sink_format->code != source_format->code)
 288                 outfmt |= VI6_WPF_OUTFMT_CSC;
 289
 290         wpf->outfmt = outfmt;
 291
 292         vsp1_dl_body_write(dlb, VI6_DPR_WPF_FPORCH(wpf->entity.index),
 293                            VI6_DPR_WPF_FPORCH_FP_WPFN);
 294
 295         vsp1_dl_body_write(dlb, VI6_WPF_WRBCK_CTRL(wpf->entity.index), 0);
 296
 297         /*
 298          * Sources. If the pipeline has a single input and BRx is not used,
 299          * configure it as the master layer. Otherwise configure all
 300          * inputs as sub-layers and select the virtual RPF as the master
 301          * layer.
 302          */
 303         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 304                 struct vsp1_rwpf *input = pipe->inputs[i];
 305
 306                 if (!input)
 307                         continue;
 308
 309                 srcrpf |= (!pipe->brx && pipe->num_inputs == 1)
 310                         ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
 311                         : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
 312         }
 313
 314         if (pipe->brx)
 315                 srcrpf |= pipe->brx->type == VSP1_ENTITY_BRU
 316                         ? VI6_WPF_SRCRPF_VIRACT_MST
 317                         : VI6_WPF_SRCRPF_VIRACT2_MST;
 318
 319         vsp1_wpf_write(wpf, dlb, VI6_WPF_SRCRPF, srcrpf);
 320
 321         /* Enable interrupts. */
 322         vsp1_dl_body_write(dlb, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
 323         vsp1_dl_body_write(dlb, VI6_WPF_IRQ_ENB(wpf->entity.index),
 324                            VI6_WFP_IRQ_ENB_DFEE);
 325 }
 326
 327 static void wpf_configure_frame(struct vsp1_entity *entity,
 328                                 struct vsp1_pipeline *pipe,
 329                                 struct vsp1_dl_list *dl,
 330                                 struct vsp1_dl_body *dlb)
 331 {
 332         const unsigned int mask = BIT(WPF_CTRL_VFLIP)
 333                                 | BIT(WPF_CTRL_HFLIP);
 334         struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
 335         unsigned long flags;
 336         u32 outfmt;
 337
 338         spin_lock_irqsave(&wpf->flip.lock, flags);
 339         wpf->flip.active = (wpf->flip.active & ~mask)
 340                          | (wpf->flip.pending & mask);
 341         spin_unlock_irqrestore(&wpf->flip.lock, flags);
 342
 343         outfmt = (wpf->alpha << VI6_WPF_OUTFMT_PDV_SHIFT) | wpf->outfmt;
 344
 345         if (wpf->flip.active & BIT(WPF_CTRL_VFLIP))
 346                 outfmt |= VI6_WPF_OUTFMT_FLP;
 347         if (wpf->flip.active & BIT(WPF_CTRL_HFLIP))
 348                 outfmt |= VI6_WPF_OUTFMT_HFLP;
 349
 350         vsp1_wpf_write(wpf, dlb, VI6_WPF_OUTFMT, outfmt);
 351 }
 352
 353 static void wpf_configure_partition(struct vsp1_entity *entity,
 354                                     struct vsp1_pipeline *pipe,
 355                                     struct vsp1_dl_list *dl,
 356                                     struct vsp1_dl_body *dlb)
 357 {
 358         struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
 359         struct vsp1_device *vsp1 = wpf->entity.vsp1;
 360         struct vsp1_rwpf_memory mem = wpf->mem;
 361         const struct v4l2_mbus_framefmt *sink_format;
 362         const struct v4l2_pix_format_mplane *format = &wpf->format;
 363         const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
 364         unsigned int width;
 365         unsigned int height;
 366         unsigned int left;
 367         unsigned int offset;
 368         unsigned int flip;
 369         unsigned int i;
 370
 371         sink_format = vsp1_entity_get_pad_format(&wpf->entity,
 372                                                  wpf->entity.config,
 373                                                  RWPF_PAD_SINK);
 374         width = sink_format->width;
 375         height = sink_format->height;
 376         left = 0;
 377
 378         /*
 379          * Cropping. The partition algorithm can split the image into
 380          * multiple slices.
 381          */
 382         if (pipe->partitions > 1) {
 383                 width = pipe->partition->wpf.width;
 384                 left = pipe->partition->wpf.left;
 385         }
 386
 387         vsp1_wpf_write(wpf, dlb, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
 388                        (0 << VI6_WPF_SZCLIP_OFST_SHIFT) |
 389                        (width << VI6_WPF_SZCLIP_SIZE_SHIFT));
 390         vsp1_wpf_write(wpf, dlb, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
 391                        (0 << VI6_WPF_SZCLIP_OFST_SHIFT) |
 392                        (height << VI6_WPF_SZCLIP_SIZE_SHIFT));
 393
 394         if (pipe->lif)
 395                 return;
 396
 397         /*
 398          * Update the memory offsets based on flipping configuration.
 399          * The destination addresses point to the locations where the
 400          * VSP starts writing to memory, which can be any corner of the
 401          * image depending on the combination of flipping and rotation.
 402          */
 403
 404         /*
 405          * First take the partition left coordinate into account.
 406          * Compute the offset to order the partitions correctly on the
 407          * output based on whether flipping is enabled. Consider
 408          * horizontal flipping when rotation is disabled but vertical
 409          * flipping when rotation is enabled, as rotating the image
 410          * switches the horizontal and vertical directions. The offset
 411          * is applied horizontally or vertically accordingly.
 412          */
 413         flip = wpf->flip.active;
 414
 415         if (flip & BIT(WPF_CTRL_HFLIP) && !wpf->flip.rotate)
 416                 offset = format->width - left - width;
 417         else if (flip & BIT(WPF_CTRL_VFLIP) && wpf->flip.rotate)
 418                 offset = format->height - left - width;
 419         else
 420                 offset = left;
 421
 422         for (i = 0; i < format->num_planes; ++i) {
 423                 unsigned int hsub = i > 0 ? fmtinfo->hsub : 1;
 424                 unsigned int vsub = i > 0 ? fmtinfo->vsub : 1;
 425
 426                 if (wpf->flip.rotate)
 427                         mem.addr[i] += offset / vsub
 428                                      * format->plane_fmt[i].bytesperline;
 429                 else
 430                         mem.addr[i] += offset / hsub
 431                                      * fmtinfo->bpp[i] / 8;
 432         }
 433
 434         if (flip & BIT(WPF_CTRL_VFLIP)) {
 435                 /*
 436                  * When rotating the output (after rotation) image
 437                  * height is equal to the partition width (before
 438                  * rotation). Otherwise it is equal to the output
 439                  * image height.
 440                  */
 441                 if (wpf->flip.rotate)
 442                         height = width;
 443                 else
 444                         height = format->height;
 445
 446                 mem.addr[0] += (height - 1)
 447                              * format->plane_fmt[0].bytesperline;
 448
 449                 if (format->num_planes > 1) {
 450                         offset = (height / fmtinfo->vsub - 1)
 451                                * format->plane_fmt[1].bytesperline;
 452                         mem.addr[1] += offset;
 453                         mem.addr[2] += offset;
 454                 }
 455         }
 456
 457         if (wpf->flip.rotate && !(flip & BIT(WPF_CTRL_HFLIP))) {
 458                 unsigned int hoffset = max(0, (int)format->width - 16);
 459
 460                 /*
 461                  * Compute the output coordinate. The partition
 462                  * horizontal (left) offset becomes a vertical offset.
 463                  */
 464                 for (i = 0; i < format->num_planes; ++i) {
 465                         unsigned int hsub = i > 0 ? fmtinfo->hsub : 1;
 466
 467                         mem.addr[i] += hoffset / hsub
 468                                      * fmtinfo->bpp[i] / 8;
 469                 }
 470         }
 471
 472         /*
 473          * On Gen3 hardware the SPUVS bit has no effect on 3-planar
 474          * formats. Swap the U and V planes manually in that case.
 475          */
 476         if (vsp1->info->gen == 3 && format->num_planes == 3 &&
 477             fmtinfo->swap_uv)
 478                 swap(mem.addr[1], mem.addr[2]);
 479
 480         vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_ADDR_Y, mem.addr[0]);
 481         vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_ADDR_C0, mem.addr[1]);
 482         vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_ADDR_C1, mem.addr[2]);
 483 }
 484
 485 static unsigned int wpf_max_width(struct vsp1_entity *entity,
 486                                   struct vsp1_pipeline *pipe)
 487 {
 488         struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
 489
 490         return wpf->flip.rotate ? 256 : wpf->max_width;
 491 }
 492
 493 static void wpf_partition(struct vsp1_entity *entity,
 494                           struct vsp1_pipeline *pipe,
 495                           struct vsp1_partition *partition,
 496                           unsigned int partition_idx,
 497                           struct vsp1_partition_window *window)
 498 {
 499         partition->wpf = *window;
 500 }
 501
 502 static const struct vsp1_entity_operations wpf_entity_ops = {
 503         .destroy = vsp1_wpf_destroy,
 504         .configure_stream = wpf_configure_stream,
 505         .configure_frame = wpf_configure_frame,
 506         .configure_partition = wpf_configure_partition,
 507         .max_width = wpf_max_width,
 508         .partition = wpf_partition,
 509 };
 510
 511 /* -----------------------------------------------------------------------------
 512  * Initialization and Cleanup
 513  */
 514
 515 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
 516 {
 517         struct vsp1_rwpf *wpf;
 518         char name[6];
 519         int ret;
 520
 521         wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
 522         if (wpf == NULL)
 523                 return ERR_PTR(-ENOMEM);
 524
 525         if (vsp1->info->gen == 2) {
 526                 wpf->max_width = WPF_GEN2_MAX_WIDTH;
 527                 wpf->max_height = WPF_GEN2_MAX_HEIGHT;
 528         } else {
 529                 wpf->max_width = WPF_GEN3_MAX_WIDTH;
 530                 wpf->max_height = WPF_GEN3_MAX_HEIGHT;
 531         }
 532
 533         wpf->entity.ops = &wpf_entity_ops;
 534         wpf->entity.type = VSP1_ENTITY_WPF;
 535         wpf->entity.index = index;
 536
 537         sprintf(name, "wpf.%u", index);
 538         ret = vsp1_entity_init(vsp1, &wpf->entity, name, 2, &wpf_ops,
 539                                MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);
 540         if (ret < 0)
 541                 return ERR_PTR(ret);
 542
 543         /* Initialize the display list manager. */
 544         wpf->dlm = vsp1_dlm_create(vsp1, index, 64);
 545         if (!wpf->dlm) {
 546                 ret = -ENOMEM;
 547                 goto error;
 548         }
 549
 550         /* Initialize the control handler. */
 551         ret = wpf_init_controls(wpf);
 552         if (ret < 0) {
 553                 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
 554                         index);
 555                 goto error;
 556         }
 557
 558         v4l2_ctrl_handler_setup(&wpf->ctrls);
 559
 560         return wpf;
 561
 562 error:
 563         vsp1_entity_destroy(&wpf->entity);
 564         return ERR_PTR(ret);
 565 }