drivers/media/platform/vsp1/vsp1_wpf.c

   1 /*
   2  * vsp1_wpf.c  --  R-Car VSP1 Write Pixel Formatter
   3  *
   4  * Copyright (C) 2013-2014 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 <linux/device.h>
  15
  16 #include <media/v4l2-subdev.h>
  17
  18 #include "vsp1.h"
  19 #include "vsp1_dl.h"
  20 #include "vsp1_pipe.h"
  21 #include "vsp1_rwpf.h"
  22 #include "vsp1_video.h"
  23
  24 #define WPF_GEN2_MAX_WIDTH                      2048U
  25 #define WPF_GEN2_MAX_HEIGHT                     2048U
  26 #define WPF_GEN3_MAX_WIDTH                      8190U
  27 #define WPF_GEN3_MAX_HEIGHT                     8190U
  28
  29 /* -----------------------------------------------------------------------------
  30  * Device Access
  31  */
  32
  33 static inline void vsp1_wpf_write(struct vsp1_rwpf *wpf,
  34                                   struct vsp1_dl_list *dl, u32 reg, u32 data)
  35 {
  36         vsp1_dl_list_write(dl, reg + wpf->entity.index * VI6_WPF_OFFSET, data);
  37 }
  38
  39 /* -----------------------------------------------------------------------------
  40  * Controls
  41  */
  42
  43 enum wpf_flip_ctrl {
  44         WPF_CTRL_VFLIP = 0,
  45         WPF_CTRL_HFLIP = 1,
  46 };
  47
  48 static int vsp1_wpf_set_rotation(struct vsp1_rwpf *wpf, unsigned int rotation)
  49 {
  50         struct vsp1_video *video = wpf->video;
  51         struct v4l2_mbus_framefmt *sink_format;
  52         struct v4l2_mbus_framefmt *source_format;
  53         bool rotate;
  54         int ret = 0;
  55
  56         /*
  57          * Only consider the 0°/180° from/to 90°/270° modifications, the rest
  58          * is taken care of by the flipping configuration.
  59          */
  60         rotate = rotation == 90 || rotation == 270;
  61         if (rotate == wpf->flip.rotate)
  62                 return 0;
  63
  64         /* Changing rotation isn't allowed when buffers are allocated. */
  65         mutex_lock(&video->lock);
  66
  67         if (vb2_is_busy(&video->queue)) {
  68                 ret = -EBUSY;
  69                 goto done;
  70         }
  71
  72         sink_format = vsp1_entity_get_pad_format(&wpf->entity,
  73                                                  wpf->entity.config,
  74                                                  RWPF_PAD_SINK);
  75         source_format = vsp1_entity_get_pad_format(&wpf->entity,
  76                                                    wpf->entity.config,
  77                                                    RWPF_PAD_SOURCE);
  78
  79         mutex_lock(&wpf->entity.lock);
  80
  81         if (rotate) {
  82                 source_format->width = sink_format->height;
  83                 source_format->height = sink_format->width;
  84         } else {
  85                 source_format->width = sink_format->width;
  86                 source_format->height = sink_format->height;
  87         }
  88
  89         wpf->flip.rotate = rotate;
  90
  91         mutex_unlock(&wpf->entity.lock);
  92
  93 done:
  94         mutex_unlock(&video->lock);
  95         return ret;
  96 }
  97
  98 static int vsp1_wpf_s_ctrl(struct v4l2_ctrl *ctrl)
  99 {
 100         struct vsp1_rwpf *wpf =
 101                 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
 102         unsigned int rotation;
 103         u32 flip = 0;
 104         int ret;
 105
 106         /* Update the rotation. */
 107         rotation = wpf->flip.ctrls.rotate ? wpf->flip.ctrls.rotate->val : 0;
 108         ret = vsp1_wpf_set_rotation(wpf, rotation);
 109         if (ret < 0)
 110                 return ret;
 111
 112         /*
 113          * Compute the flip value resulting from all three controls, with
 114          * rotation by 180° flipping the image in both directions. Store the
 115          * result in the pending flip field for the next frame that will be
 116          * processed.
 117          */
 118         if (wpf->flip.ctrls.vflip->val)
 119                 flip |= BIT(WPF_CTRL_VFLIP);
 120
 121         if (wpf->flip.ctrls.hflip && wpf->flip.ctrls.hflip->val)
 122                 flip |= BIT(WPF_CTRL_HFLIP);
 123
 124         if (rotation == 180 || rotation == 270)
 125                 flip ^= BIT(WPF_CTRL_VFLIP) | BIT(WPF_CTRL_HFLIP);
 126
 127         spin_lock_irq(&wpf->flip.lock);
 128         wpf->flip.pending = flip;
 129         spin_unlock_irq(&wpf->flip.lock);
 130
 131         return 0;
 132 }
 133
 134 static const struct v4l2_ctrl_ops vsp1_wpf_ctrl_ops = {
 135         .s_ctrl = vsp1_wpf_s_ctrl,
 136 };
 137
 138 static int wpf_init_controls(struct vsp1_rwpf *wpf)
 139 {
 140         struct vsp1_device *vsp1 = wpf->entity.vsp1;
 141         unsigned int num_flip_ctrls;
 142
 143         spin_lock_init(&wpf->flip.lock);
 144
 145         if (wpf->entity.index != 0) {
 146                 /* Only WPF0 supports flipping. */
 147                 num_flip_ctrls = 0;
 148         } else if (vsp1->info->features & VSP1_HAS_WPF_HFLIP) {
 149                 /*
 150                  * When horizontal flip is supported the WPF implements three
 151                  * controls (horizontal flip, vertical flip and rotation).
 152                  */
 153                 num_flip_ctrls = 3;
 154         } else if (vsp1->info->features & VSP1_HAS_WPF_VFLIP) {
 155                 /*
 156                  * When only vertical flip is supported the WPF implements a
 157                  * single control (vertical flip).
 158                  */
 159                 num_flip_ctrls = 1;
 160         } else {
 161                 /* Otherwise flipping is not supported. */
 162                 num_flip_ctrls = 0;
 163         }
 164
 165         vsp1_rwpf_init_ctrls(wpf, num_flip_ctrls);
 166
 167         if (num_flip_ctrls >= 1) {
 168                 wpf->flip.ctrls.vflip =
 169                         v4l2_ctrl_new_std(&wpf->ctrls, &vsp1_wpf_ctrl_ops,
 170                                           V4L2_CID_VFLIP, 0, 1, 1, 0);
 171         }
 172
 173         if (num_flip_ctrls == 3) {
 174                 wpf->flip.ctrls.hflip =
 175                         v4l2_ctrl_new_std(&wpf->ctrls, &vsp1_wpf_ctrl_ops,
 176                                           V4L2_CID_HFLIP, 0, 1, 1, 0);
 177                 wpf->flip.ctrls.rotate =
 178                         v4l2_ctrl_new_std(&wpf->ctrls, &vsp1_wpf_ctrl_ops,
 179                                           V4L2_CID_ROTATE, 0, 270, 90, 0);
 180                 v4l2_ctrl_cluster(3, &wpf->flip.ctrls.vflip);
 181         }
 182
 183         if (wpf->ctrls.error) {
 184                 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
 185                         wpf->entity.index);
 186                 return wpf->ctrls.error;
 187         }
 188
 189         return 0;
 190 }
 191
 192 /* -----------------------------------------------------------------------------
 193  * V4L2 Subdevice Core Operations
 194  */
 195
 196 static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
 197 {
 198         struct vsp1_rwpf *wpf = to_rwpf(subdev);
 199         struct vsp1_device *vsp1 = wpf->entity.vsp1;
 200
 201         if (enable)
 202                 return 0;
 203
 204         /*
 205          * Write to registers directly when stopping the stream as there will be
 206          * no pipeline run to apply the display list.
 207          */
 208         vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
 209         vsp1_write(vsp1, wpf->entity.index * VI6_WPF_OFFSET +
 210                    VI6_WPF_SRCRPF, 0);
 211
 212         return 0;
 213 }
 214
 215 /* -----------------------------------------------------------------------------
 216  * V4L2 Subdevice Operations
 217  */
 218
 219 static const struct v4l2_subdev_video_ops wpf_video_ops = {
 220         .s_stream = wpf_s_stream,
 221 };
 222
 223 static const struct v4l2_subdev_ops wpf_ops = {
 224         .video  = &wpf_video_ops,
 225         .pad    = &vsp1_rwpf_pad_ops,
 226 };
 227
 228 /* -----------------------------------------------------------------------------
 229  * VSP1 Entity Operations
 230  */
 231
 232 static void vsp1_wpf_destroy(struct vsp1_entity *entity)
 233 {
 234         struct vsp1_rwpf *wpf = entity_to_rwpf(entity);
 235
 236         vsp1_dlm_destroy(wpf->dlm);
 237 }
 238
 239 static void wpf_configure(struct vsp1_entity *entity,
 240                           struct vsp1_pipeline *pipe,
 241                           struct vsp1_dl_list *dl,
 242                           enum vsp1_entity_params params)
 243 {
 244         struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
 245         struct vsp1_device *vsp1 = wpf->entity.vsp1;
 246         const struct v4l2_mbus_framefmt *source_format;
 247         const struct v4l2_mbus_framefmt *sink_format;
 248         unsigned int i;
 249         u32 outfmt = 0;
 250         u32 srcrpf = 0;
 251
 252         if (params == VSP1_ENTITY_PARAMS_RUNTIME) {
 253                 const unsigned int mask = BIT(WPF_CTRL_VFLIP)
 254                                         | BIT(WPF_CTRL_HFLIP);
 255                 unsigned long flags;
 256
 257                 spin_lock_irqsave(&wpf->flip.lock, flags);
 258                 wpf->flip.active = (wpf->flip.active & ~mask)
 259                                  | (wpf->flip.pending & mask);
 260                 spin_unlock_irqrestore(&wpf->flip.lock, flags);
 261
 262                 outfmt = (wpf->alpha << VI6_WPF_OUTFMT_PDV_SHIFT) | wpf->outfmt;
 263
 264                 if (wpf->flip.active & BIT(WPF_CTRL_VFLIP))
 265                         outfmt |= VI6_WPF_OUTFMT_FLP;
 266                 if (wpf->flip.active & BIT(WPF_CTRL_HFLIP))
 267                         outfmt |= VI6_WPF_OUTFMT_HFLP;
 268
 269                 vsp1_wpf_write(wpf, dl, VI6_WPF_OUTFMT, outfmt);
 270                 return;
 271         }
 272
 273         sink_format = vsp1_entity_get_pad_format(&wpf->entity,
 274                                                  wpf->entity.config,
 275                                                  RWPF_PAD_SINK);
 276         source_format = vsp1_entity_get_pad_format(&wpf->entity,
 277                                                    wpf->entity.config,
 278                                                    RWPF_PAD_SOURCE);
 279
 280         if (params == VSP1_ENTITY_PARAMS_PARTITION) {
 281                 const struct v4l2_pix_format_mplane *format = &wpf->format;
 282                 const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
 283                 struct vsp1_rwpf_memory mem = wpf->mem;
 284                 unsigned int flip = wpf->flip.active;
 285                 unsigned int width = sink_format->width;
 286                 unsigned int height = sink_format->height;
 287                 unsigned int offset;
 288
 289                 /*
 290                  * Cropping. The partition algorithm can split the image into
 291                  * multiple slices.
 292                  */
 293                 if (pipe->partitions > 1)
 294                         width = pipe->partition->wpf.width;
 295
 296                 vsp1_wpf_write(wpf, dl, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
 297                                (0 << VI6_WPF_SZCLIP_OFST_SHIFT) |
 298                                (width << VI6_WPF_SZCLIP_SIZE_SHIFT));
 299                 vsp1_wpf_write(wpf, dl, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
 300                                (0 << VI6_WPF_SZCLIP_OFST_SHIFT) |
 301                                (height << VI6_WPF_SZCLIP_SIZE_SHIFT));
 302
 303                 if (pipe->lif)
 304                         return;
 305
 306                 /*
 307                  * Update the memory offsets based on flipping configuration.
 308                  * The destination addresses point to the locations where the
 309                  * VSP starts writing to memory, which can be any corner of the
 310                  * image depending on the combination of flipping and rotation.
 311                  */
 312
 313                 /*
 314                  * First take the partition left coordinate into account.
 315                  * Compute the offset to order the partitions correctly on the
 316                  * output based on whether flipping is enabled. Consider
 317                  * horizontal flipping when rotation is disabled but vertical
 318                  * flipping when rotation is enabled, as rotating the image
 319                  * switches the horizontal and vertical directions. The offset
 320                  * is applied horizontally or vertically accordingly.
 321                  */
 322                 if (flip & BIT(WPF_CTRL_HFLIP) && !wpf->flip.rotate)
 323                         offset = format->width - pipe->partition->wpf.left
 324                                 - pipe->partition->wpf.width;
 325                 else if (flip & BIT(WPF_CTRL_VFLIP) && wpf->flip.rotate)
 326                         offset = format->height - pipe->partition->wpf.left
 327                                 - pipe->partition->wpf.width;
 328                 else
 329                         offset = pipe->partition->wpf.left;
 330
 331                 for (i = 0; i < format->num_planes; ++i) {
 332                         unsigned int hsub = i > 0 ? fmtinfo->hsub : 1;
 333                         unsigned int vsub = i > 0 ? fmtinfo->vsub : 1;
 334
 335                         if (wpf->flip.rotate)
 336                                 mem.addr[i] += offset / vsub
 337                                              * format->plane_fmt[i].bytesperline;
 338                         else
 339                                 mem.addr[i] += offset / hsub
 340                                              * fmtinfo->bpp[i] / 8;
 341                 }
 342
 343                 if (flip & BIT(WPF_CTRL_VFLIP)) {
 344                         /*
 345                          * When rotating the output (after rotation) image
 346                          * height is equal to the partition width (before
 347                          * rotation). Otherwise it is equal to the output
 348                          * image height.
 349                          */
 350                         if (wpf->flip.rotate)
 351                                 height = pipe->partition->wpf.width;
 352                         else
 353                                 height = format->height;
 354
 355                         mem.addr[0] += (height - 1)
 356                                      * format->plane_fmt[0].bytesperline;
 357
 358                         if (format->num_planes > 1) {
 359                                 offset = (height / fmtinfo->vsub - 1)
 360                                        * format->plane_fmt[1].bytesperline;
 361                                 mem.addr[1] += offset;
 362                                 mem.addr[2] += offset;
 363                         }
 364                 }
 365
 366                 if (wpf->flip.rotate && !(flip & BIT(WPF_CTRL_HFLIP))) {
 367                         unsigned int hoffset = max(0, (int)format->width - 16);
 368
 369                         /*
 370                          * Compute the output coordinate. The partition
 371                          * horizontal (left) offset becomes a vertical offset.
 372                          */
 373                         for (i = 0; i < format->num_planes; ++i) {
 374                                 unsigned int hsub = i > 0 ? fmtinfo->hsub : 1;
 375
 376                                 mem.addr[i] += hoffset / hsub
 377                                              * fmtinfo->bpp[i] / 8;
 378                         }
 379                 }
 380
 381                 /*
 382                  * On Gen3 hardware the SPUVS bit has no effect on 3-planar
 383                  * formats. Swap the U and V planes manually in that case.
 384                  */
 385                 if (vsp1->info->gen == 3 && format->num_planes == 3 &&
 386                     fmtinfo->swap_uv)
 387                         swap(mem.addr[1], mem.addr[2]);
 388
 389                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_ADDR_Y, mem.addr[0]);
 390                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_ADDR_C0, mem.addr[1]);
 391                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_ADDR_C1, mem.addr[2]);
 392                 return;
 393         }
 394
 395         /* Format */
 396         if (!pipe->lif) {
 397                 const struct v4l2_pix_format_mplane *format = &wpf->format;
 398                 const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
 399
 400                 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
 401
 402                 if (wpf->flip.rotate)
 403                         outfmt |= VI6_WPF_OUTFMT_ROT;
 404
 405                 if (fmtinfo->alpha)
 406                         outfmt |= VI6_WPF_OUTFMT_PXA;
 407                 if (fmtinfo->swap_yc)
 408                         outfmt |= VI6_WPF_OUTFMT_SPYCS;
 409                 if (fmtinfo->swap_uv)
 410                         outfmt |= VI6_WPF_OUTFMT_SPUVS;
 411
 412                 /* Destination stride and byte swapping. */
 413                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_STRIDE_Y,
 414                                format->plane_fmt[0].bytesperline);
 415                 if (format->num_planes > 1)
 416                         vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_STRIDE_C,
 417                                        format->plane_fmt[1].bytesperline);
 418
 419                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSWAP, fmtinfo->swap);
 420
 421                 if (vsp1->info->features & VSP1_HAS_WPF_HFLIP &&
 422                     wpf->entity.index == 0)
 423                         vsp1_wpf_write(wpf, dl, VI6_WPF_ROT_CTRL,
 424                                        VI6_WPF_ROT_CTRL_LN16 |
 425                                        (256 << VI6_WPF_ROT_CTRL_LMEM_WD_SHIFT));
 426         }
 427
 428         if (sink_format->code != source_format->code)
 429                 outfmt |= VI6_WPF_OUTFMT_CSC;
 430
 431         wpf->outfmt = outfmt;
 432
 433         vsp1_dl_list_write(dl, VI6_DPR_WPF_FPORCH(wpf->entity.index),
 434                            VI6_DPR_WPF_FPORCH_FP_WPFN);
 435
 436         vsp1_dl_list_write(dl, VI6_WPF_WRBCK_CTRL, 0);
 437
 438         /*
 439          * Sources. If the pipeline has a single input and BRU is not used,
 440          * configure it as the master layer. Otherwise configure all
 441          * inputs as sub-layers and select the virtual RPF as the master
 442          * layer.
 443          */
 444         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 445                 struct vsp1_rwpf *input = pipe->inputs[i];
 446
 447                 if (!input)
 448                         continue;
 449
 450                 srcrpf |= (!pipe->bru && pipe->num_inputs == 1)
 451                         ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
 452                         : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
 453         }
 454
 455         if (pipe->bru)
 456                 srcrpf |= pipe->bru->type == VSP1_ENTITY_BRU
 457                         ? VI6_WPF_SRCRPF_VIRACT_MST
 458                         : VI6_WPF_SRCRPF_VIRACT2_MST;
 459
 460         vsp1_wpf_write(wpf, dl, VI6_WPF_SRCRPF, srcrpf);
 461
 462         /* Enable interrupts */
 463         vsp1_dl_list_write(dl, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
 464         vsp1_dl_list_write(dl, VI6_WPF_IRQ_ENB(wpf->entity.index),
 465                            VI6_WFP_IRQ_ENB_DFEE);
 466 }
 467
 468 static unsigned int wpf_max_width(struct vsp1_entity *entity,
 469                                   struct vsp1_pipeline *pipe)
 470 {
 471         struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
 472
 473         return wpf->flip.rotate ? 256 : wpf->max_width;
 474 }
 475
 476 static void wpf_partition(struct vsp1_entity *entity,
 477                           struct vsp1_pipeline *pipe,
 478                           struct vsp1_partition *partition,
 479                           unsigned int partition_idx,
 480                           struct vsp1_partition_window *window)
 481 {
 482         partition->wpf = *window;
 483 }
 484
 485 static const struct vsp1_entity_operations wpf_entity_ops = {
 486         .destroy = vsp1_wpf_destroy,
 487         .configure = wpf_configure,
 488         .max_width = wpf_max_width,
 489         .partition = wpf_partition,
 490 };
 491
 492 /* -----------------------------------------------------------------------------
 493  * Initialization and Cleanup
 494  */
 495
 496 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
 497 {
 498         struct vsp1_rwpf *wpf;
 499         char name[6];
 500         int ret;
 501
 502         wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
 503         if (wpf == NULL)
 504                 return ERR_PTR(-ENOMEM);
 505
 506         if (vsp1->info->gen == 2) {
 507                 wpf->max_width = WPF_GEN2_MAX_WIDTH;
 508                 wpf->max_height = WPF_GEN2_MAX_HEIGHT;
 509         } else {
 510                 wpf->max_width = WPF_GEN3_MAX_WIDTH;
 511                 wpf->max_height = WPF_GEN3_MAX_HEIGHT;
 512         }
 513
 514         wpf->entity.ops = &wpf_entity_ops;
 515         wpf->entity.type = VSP1_ENTITY_WPF;
 516         wpf->entity.index = index;
 517
 518         sprintf(name, "wpf.%u", index);
 519         ret = vsp1_entity_init(vsp1, &wpf->entity, name, 2, &wpf_ops,
 520                                MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);
 521         if (ret < 0)
 522                 return ERR_PTR(ret);
 523
 524         /* Initialize the display list manager. */
 525         wpf->dlm = vsp1_dlm_create(vsp1, index, 64);
 526         if (!wpf->dlm) {
 527                 ret = -ENOMEM;
 528                 goto error;
 529         }
 530
 531         /* Initialize the control handler. */
 532         ret = wpf_init_controls(wpf);
 533         if (ret < 0) {
 534                 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
 535                         index);
 536                 goto error;
 537         }
 538
 539         v4l2_ctrl_handler_setup(&wpf->ctrls);
 540
 541         return wpf;
 542
 543 error:
 544         vsp1_entity_destroy(&wpf->entity);
 545         return ERR_PTR(ret);
 546 }