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 int wpf_configure_writeback_chain(struct vsp1_rwpf *wpf, 236 struct vsp1_dl_list *dl) 237 { 238 unsigned int index = wpf->entity.index; 239 struct vsp1_dl_list *dl_next; 240 struct vsp1_dl_body *dlb; 241 242 dl_next = vsp1_dl_list_get(wpf->dlm); 243 if (!dl_next) { 244 dev_err(wpf->entity.vsp1->dev, 245 "Failed to obtain a dl list, disabling writeback\n"); 246 return -ENOMEM; 247 } 248 249 dlb = vsp1_dl_list_get_body0(dl_next); 250 vsp1_dl_body_write(dlb, VI6_WPF_WRBCK_CTRL(index), 0); 251 vsp1_dl_list_add_chain(dl, dl_next); 252 253 return 0; 254 } 255 256 static void wpf_configure_stream(struct vsp1_entity *entity, 257 struct vsp1_pipeline *pipe, 258 struct vsp1_dl_list *dl, 259 struct vsp1_dl_body *dlb) 260 { 261 struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev); 262 struct vsp1_device *vsp1 = wpf->entity.vsp1; 263 const struct v4l2_mbus_framefmt *source_format; 264 const struct v4l2_mbus_framefmt *sink_format; 265 unsigned int index = wpf->entity.index; 266 unsigned int i; 267 u32 outfmt = 0; 268 u32 srcrpf = 0; 269 int ret; 270 271 sink_format = vsp1_entity_get_pad_format(&wpf->entity, 272 wpf->entity.config, 273 RWPF_PAD_SINK); 274 source_format = vsp1_entity_get_pad_format(&wpf->entity, 275 wpf->entity.config, 276 RWPF_PAD_SOURCE); 277 278 /* Format */ 279 if (!pipe->lif || wpf->writeback) { 280 const struct v4l2_pix_format_mplane *format = &wpf->format; 281 const struct vsp1_format_info *fmtinfo = wpf->fmtinfo; 282 283 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT; 284 285 if (wpf->flip.rotate) 286 outfmt |= VI6_WPF_OUTFMT_ROT; 287 288 if (fmtinfo->alpha) 289 outfmt |= VI6_WPF_OUTFMT_PXA; 290 if (fmtinfo->swap_yc) 291 outfmt |= VI6_WPF_OUTFMT_SPYCS; 292 if (fmtinfo->swap_uv) 293 outfmt |= VI6_WPF_OUTFMT_SPUVS; 294 295 /* Destination stride and byte swapping. */ 296 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_STRIDE_Y, 297 format->plane_fmt[0].bytesperline); 298 if (format->num_planes > 1) 299 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_STRIDE_C, 300 format->plane_fmt[1].bytesperline); 301 302 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSWAP, fmtinfo->swap); 303 304 if (vsp1_feature(vsp1, VSP1_HAS_WPF_HFLIP) && index == 0) 305 vsp1_wpf_write(wpf, dlb, VI6_WPF_ROT_CTRL, 306 VI6_WPF_ROT_CTRL_LN16 | 307 (256 << VI6_WPF_ROT_CTRL_LMEM_WD_SHIFT)); 308 } 309 310 if (sink_format->code != source_format->code) 311 outfmt |= VI6_WPF_OUTFMT_CSC; 312 313 wpf->outfmt = outfmt; 314 315 vsp1_dl_body_write(dlb, VI6_DPR_WPF_FPORCH(index), 316 VI6_DPR_WPF_FPORCH_FP_WPFN); 317 318 /* 319 * Sources. If the pipeline has a single input and BRx is not used, 320 * configure it as the master layer. Otherwise configure all 321 * inputs as sub-layers and select the virtual RPF as the master 322 * layer. 323 */ 324 for (i = 0; i < vsp1->info->rpf_count; ++i) { 325 struct vsp1_rwpf *input = pipe->inputs[i]; 326 327 if (!input) 328 continue; 329 330 srcrpf |= (!pipe->brx && pipe->num_inputs == 1) 331 ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index) 332 : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index); 333 } 334 335 if (pipe->brx) 336 srcrpf |= pipe->brx->type == VSP1_ENTITY_BRU 337 ? VI6_WPF_SRCRPF_VIRACT_MST 338 : VI6_WPF_SRCRPF_VIRACT2_MST; 339 340 vsp1_wpf_write(wpf, dlb, VI6_WPF_SRCRPF, srcrpf); 341 342 /* Enable interrupts. */ 343 vsp1_dl_body_write(dlb, VI6_WPF_IRQ_STA(index), 0); 344 vsp1_dl_body_write(dlb, VI6_WPF_IRQ_ENB(index), 345 VI6_WPF_IRQ_ENB_DFEE); 346 347 /* 348 * Configure writeback for display pipelines (the wpf writeback flag is 349 * never set for memory-to-memory pipelines). Start by adding a chained 350 * display list to disable writeback after a single frame, and process 351 * to enable writeback. If the display list allocation fails don't 352 * enable writeback as we wouldn't be able to safely disable it, 353 * resulting in possible memory corruption. 354 */ 355 if (wpf->writeback) { 356 ret = wpf_configure_writeback_chain(wpf, dl); 357 if (ret < 0) 358 wpf->writeback = false; 359 } 360 361 vsp1_dl_body_write(dlb, VI6_WPF_WRBCK_CTRL(index), 362 wpf->writeback ? VI6_WPF_WRBCK_CTRL_WBMD : 0); 363 } 364 365 static void wpf_configure_frame(struct vsp1_entity *entity, 366 struct vsp1_pipeline *pipe, 367 struct vsp1_dl_list *dl, 368 struct vsp1_dl_body *dlb) 369 { 370 const unsigned int mask = BIT(WPF_CTRL_VFLIP) 371 | BIT(WPF_CTRL_HFLIP); 372 struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev); 373 unsigned long flags; 374 u32 outfmt; 375 376 spin_lock_irqsave(&wpf->flip.lock, flags); 377 wpf->flip.active = (wpf->flip.active & ~mask) 378 | (wpf->flip.pending & mask); 379 spin_unlock_irqrestore(&wpf->flip.lock, flags); 380 381 outfmt = (wpf->alpha << VI6_WPF_OUTFMT_PDV_SHIFT) | wpf->outfmt; 382 383 if (wpf->flip.active & BIT(WPF_CTRL_VFLIP)) 384 outfmt |= VI6_WPF_OUTFMT_FLP; 385 if (wpf->flip.active & BIT(WPF_CTRL_HFLIP)) 386 outfmt |= VI6_WPF_OUTFMT_HFLP; 387 388 vsp1_wpf_write(wpf, dlb, VI6_WPF_OUTFMT, outfmt); 389 } 390 391 static void wpf_configure_partition(struct vsp1_entity *entity, 392 struct vsp1_pipeline *pipe, 393 struct vsp1_dl_list *dl, 394 struct vsp1_dl_body *dlb) 395 { 396 struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev); 397 struct vsp1_device *vsp1 = wpf->entity.vsp1; 398 struct vsp1_rwpf_memory mem = wpf->mem; 399 const struct v4l2_mbus_framefmt *sink_format; 400 const struct v4l2_pix_format_mplane *format = &wpf->format; 401 const struct vsp1_format_info *fmtinfo = wpf->fmtinfo; 402 unsigned int width; 403 unsigned int height; 404 unsigned int left; 405 unsigned int offset; 406 unsigned int flip; 407 unsigned int i; 408 409 sink_format = vsp1_entity_get_pad_format(&wpf->entity, 410 wpf->entity.config, 411 RWPF_PAD_SINK); 412 width = sink_format->width; 413 height = sink_format->height; 414 left = 0; 415 416 /* 417 * Cropping. The partition algorithm can split the image into 418 * multiple slices. 419 */ 420 if (pipe->partitions > 1) { 421 width = pipe->partition->wpf.width; 422 left = pipe->partition->wpf.left; 423 } 424 425 vsp1_wpf_write(wpf, dlb, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN | 426 (0 << VI6_WPF_SZCLIP_OFST_SHIFT) | 427 (width << VI6_WPF_SZCLIP_SIZE_SHIFT)); 428 vsp1_wpf_write(wpf, dlb, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN | 429 (0 << VI6_WPF_SZCLIP_OFST_SHIFT) | 430 (height << VI6_WPF_SZCLIP_SIZE_SHIFT)); 431 432 /* 433 * For display pipelines without writeback enabled there's no memory 434 * address to configure, return now. 435 */ 436 if (pipe->lif && !wpf->writeback) 437 return; 438 439 /* 440 * Update the memory offsets based on flipping configuration. 441 * The destination addresses point to the locations where the 442 * VSP starts writing to memory, which can be any corner of the 443 * image depending on the combination of flipping and rotation. 444 */ 445 446 /* 447 * First take the partition left coordinate into account. 448 * Compute the offset to order the partitions correctly on the 449 * output based on whether flipping is enabled. Consider 450 * horizontal flipping when rotation is disabled but vertical 451 * flipping when rotation is enabled, as rotating the image 452 * switches the horizontal and vertical directions. The offset 453 * is applied horizontally or vertically accordingly. 454 */ 455 flip = wpf->flip.active; 456 457 if (flip & BIT(WPF_CTRL_HFLIP) && !wpf->flip.rotate) 458 offset = format->width - left - width; 459 else if (flip & BIT(WPF_CTRL_VFLIP) && wpf->flip.rotate) 460 offset = format->height - left - width; 461 else 462 offset = left; 463 464 for (i = 0; i < format->num_planes; ++i) { 465 unsigned int hsub = i > 0 ? fmtinfo->hsub : 1; 466 unsigned int vsub = i > 0 ? fmtinfo->vsub : 1; 467 468 if (wpf->flip.rotate) 469 mem.addr[i] += offset / vsub 470 * format->plane_fmt[i].bytesperline; 471 else 472 mem.addr[i] += offset / hsub 473 * fmtinfo->bpp[i] / 8; 474 } 475 476 if (flip & BIT(WPF_CTRL_VFLIP)) { 477 /* 478 * When rotating the output (after rotation) image 479 * height is equal to the partition width (before 480 * rotation). Otherwise it is equal to the output 481 * image height. 482 */ 483 if (wpf->flip.rotate) 484 height = width; 485 else 486 height = format->height; 487 488 mem.addr[0] += (height - 1) 489 * format->plane_fmt[0].bytesperline; 490 491 if (format->num_planes > 1) { 492 offset = (height / fmtinfo->vsub - 1) 493 * format->plane_fmt[1].bytesperline; 494 mem.addr[1] += offset; 495 mem.addr[2] += offset; 496 } 497 } 498 499 if (wpf->flip.rotate && !(flip & BIT(WPF_CTRL_HFLIP))) { 500 unsigned int hoffset = max(0, (int)format->width - 16); 501 502 /* 503 * Compute the output coordinate. The partition 504 * horizontal (left) offset becomes a vertical offset. 505 */ 506 for (i = 0; i < format->num_planes; ++i) { 507 unsigned int hsub = i > 0 ? fmtinfo->hsub : 1; 508 509 mem.addr[i] += hoffset / hsub 510 * fmtinfo->bpp[i] / 8; 511 } 512 } 513 514 /* 515 * On Gen3 hardware the SPUVS bit has no effect on 3-planar 516 * formats. Swap the U and V planes manually in that case. 517 */ 518 if (vsp1->info->gen == 3 && format->num_planes == 3 && 519 fmtinfo->swap_uv) 520 swap(mem.addr[1], mem.addr[2]); 521 522 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_ADDR_Y, mem.addr[0]); 523 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_ADDR_C0, mem.addr[1]); 524 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_ADDR_C1, mem.addr[2]); 525 526 /* 527 * Writeback operates in single-shot mode and lasts for a single frame, 528 * reset the writeback flag to false for the next frame. 529 */ 530 wpf->writeback = false; 531 } 532 533 static unsigned int wpf_max_width(struct vsp1_entity *entity, 534 struct vsp1_pipeline *pipe) 535 { 536 struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev); 537 538 return wpf->flip.rotate ? 256 : wpf->max_width; 539 } 540 541 static void wpf_partition(struct vsp1_entity *entity, 542 struct vsp1_pipeline *pipe, 543 struct vsp1_partition *partition, 544 unsigned int partition_idx, 545 struct vsp1_partition_window *window) 546 { 547 partition->wpf = *window; 548 } 549 550 static const struct vsp1_entity_operations wpf_entity_ops = { 551 .destroy = vsp1_wpf_destroy, 552 .configure_stream = wpf_configure_stream, 553 .configure_frame = wpf_configure_frame, 554 .configure_partition = wpf_configure_partition, 555 .max_width = wpf_max_width, 556 .partition = wpf_partition, 557 }; 558 559 /* ----------------------------------------------------------------------------- 560 * Initialization and Cleanup 561 */ 562 563 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index) 564 { 565 struct vsp1_rwpf *wpf; 566 char name[6]; 567 int ret; 568 569 wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL); 570 if (wpf == NULL) 571 return ERR_PTR(-ENOMEM); 572 573 if (vsp1->info->gen == 2) { 574 wpf->max_width = WPF_GEN2_MAX_WIDTH; 575 wpf->max_height = WPF_GEN2_MAX_HEIGHT; 576 } else { 577 wpf->max_width = WPF_GEN3_MAX_WIDTH; 578 wpf->max_height = WPF_GEN3_MAX_HEIGHT; 579 } 580 581 wpf->entity.ops = &wpf_entity_ops; 582 wpf->entity.type = VSP1_ENTITY_WPF; 583 wpf->entity.index = index; 584 585 sprintf(name, "wpf.%u", index); 586 ret = vsp1_entity_init(vsp1, &wpf->entity, name, 2, &wpf_ops, 587 MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER); 588 if (ret < 0) 589 return ERR_PTR(ret); 590 591 /* Initialize the display list manager. */ 592 wpf->dlm = vsp1_dlm_create(vsp1, index, 64); 593 if (!wpf->dlm) { 594 ret = -ENOMEM; 595 goto error; 596 } 597 598 /* Initialize the control handler. */ 599 ret = wpf_init_controls(wpf); 600 if (ret < 0) { 601 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n", 602 index); 603 goto error; 604 } 605 606 v4l2_ctrl_handler_setup(&wpf->ctrls); 607 608 return wpf; 609 610 error: 611 vsp1_entity_destroy(&wpf->entity); 612 return ERR_PTR(ret); 613 } 614