1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * camss.c 4 * 5 * Qualcomm MSM Camera Subsystem - Core 6 * 7 * Copyright (c) 2015, The Linux Foundation. All rights reserved. 8 * Copyright (C) 2015-2018 Linaro Ltd. 9 */ 10 #include <linux/clk.h> 11 #include <linux/media-bus-format.h> 12 #include <linux/media.h> 13 #include <linux/module.h> 14 #include <linux/platform_device.h> 15 #include <linux/of.h> 16 #include <linux/of_graph.h> 17 #include <linux/pm_runtime.h> 18 #include <linux/pm_domain.h> 19 #include <linux/slab.h> 20 #include <linux/videodev2.h> 21 22 #include <media/media-device.h> 23 #include <media/v4l2-async.h> 24 #include <media/v4l2-device.h> 25 #include <media/v4l2-mc.h> 26 #include <media/v4l2-fwnode.h> 27 28 #include "camss.h" 29 30 #define CAMSS_CLOCK_MARGIN_NUMERATOR 105 31 #define CAMSS_CLOCK_MARGIN_DENOMINATOR 100 32 33 static const struct resources csiphy_res_8x16[] = { 34 /* CSIPHY0 */ 35 { 36 .regulator = { NULL }, 37 .clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy0_timer" }, 38 .clock_rate = { { 0 }, 39 { 0 }, 40 { 0 }, 41 { 100000000, 200000000 } }, 42 .reg = { "csiphy0", "csiphy0_clk_mux" }, 43 .interrupt = { "csiphy0" } 44 }, 45 46 /* CSIPHY1 */ 47 { 48 .regulator = { NULL }, 49 .clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy1_timer" }, 50 .clock_rate = { { 0 }, 51 { 0 }, 52 { 0 }, 53 { 100000000, 200000000 } }, 54 .reg = { "csiphy1", "csiphy1_clk_mux" }, 55 .interrupt = { "csiphy1" } 56 } 57 }; 58 59 static const struct resources csid_res_8x16[] = { 60 /* CSID0 */ 61 { 62 .regulator = { "vdda" }, 63 .clock = { "top_ahb", "ispif_ahb", "csi0_ahb", "ahb", 64 "csi0", "csi0_phy", "csi0_pix", "csi0_rdi" }, 65 .clock_rate = { { 0 }, 66 { 0 }, 67 { 0 }, 68 { 0 }, 69 { 100000000, 200000000 }, 70 { 0 }, 71 { 0 }, 72 { 0 } }, 73 .reg = { "csid0" }, 74 .interrupt = { "csid0" } 75 }, 76 77 /* CSID1 */ 78 { 79 .regulator = { "vdda" }, 80 .clock = { "top_ahb", "ispif_ahb", "csi1_ahb", "ahb", 81 "csi1", "csi1_phy", "csi1_pix", "csi1_rdi" }, 82 .clock_rate = { { 0 }, 83 { 0 }, 84 { 0 }, 85 { 0 }, 86 { 100000000, 200000000 }, 87 { 0 }, 88 { 0 }, 89 { 0 } }, 90 .reg = { "csid1" }, 91 .interrupt = { "csid1" } 92 }, 93 }; 94 95 static const struct resources_ispif ispif_res_8x16 = { 96 /* ISPIF */ 97 .clock = { "top_ahb", "ahb", "ispif_ahb", 98 "csi0", "csi0_pix", "csi0_rdi", 99 "csi1", "csi1_pix", "csi1_rdi" }, 100 .clock_for_reset = { "vfe0", "csi_vfe0" }, 101 .reg = { "ispif", "csi_clk_mux" }, 102 .interrupt = "ispif" 103 104 }; 105 106 static const struct resources vfe_res_8x16[] = { 107 /* VFE0 */ 108 { 109 .regulator = { NULL }, 110 .clock = { "top_ahb", "vfe0", "csi_vfe0", 111 "vfe_ahb", "vfe_axi", "ahb" }, 112 .clock_rate = { { 0 }, 113 { 50000000, 80000000, 100000000, 160000000, 114 177780000, 200000000, 266670000, 320000000, 115 400000000, 465000000 }, 116 { 0 }, 117 { 0 }, 118 { 0 }, 119 { 0 }, 120 { 0 }, 121 { 0 }, 122 { 0 } }, 123 .reg = { "vfe0" }, 124 .interrupt = { "vfe0" } 125 } 126 }; 127 128 static const struct resources csiphy_res_8x96[] = { 129 /* CSIPHY0 */ 130 { 131 .regulator = { NULL }, 132 .clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy0_timer" }, 133 .clock_rate = { { 0 }, 134 { 0 }, 135 { 0 }, 136 { 100000000, 200000000, 266666667 } }, 137 .reg = { "csiphy0", "csiphy0_clk_mux" }, 138 .interrupt = { "csiphy0" } 139 }, 140 141 /* CSIPHY1 */ 142 { 143 .regulator = { NULL }, 144 .clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy1_timer" }, 145 .clock_rate = { { 0 }, 146 { 0 }, 147 { 0 }, 148 { 100000000, 200000000, 266666667 } }, 149 .reg = { "csiphy1", "csiphy1_clk_mux" }, 150 .interrupt = { "csiphy1" } 151 }, 152 153 /* CSIPHY2 */ 154 { 155 .regulator = { NULL }, 156 .clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy2_timer" }, 157 .clock_rate = { { 0 }, 158 { 0 }, 159 { 0 }, 160 { 100000000, 200000000, 266666667 } }, 161 .reg = { "csiphy2", "csiphy2_clk_mux" }, 162 .interrupt = { "csiphy2" } 163 } 164 }; 165 166 static const struct resources csid_res_8x96[] = { 167 /* CSID0 */ 168 { 169 .regulator = { "vdda" }, 170 .clock = { "top_ahb", "ispif_ahb", "csi0_ahb", "ahb", 171 "csi0", "csi0_phy", "csi0_pix", "csi0_rdi" }, 172 .clock_rate = { { 0 }, 173 { 0 }, 174 { 0 }, 175 { 0 }, 176 { 100000000, 200000000, 266666667 }, 177 { 0 }, 178 { 0 }, 179 { 0 } }, 180 .reg = { "csid0" }, 181 .interrupt = { "csid0" } 182 }, 183 184 /* CSID1 */ 185 { 186 .regulator = { "vdda" }, 187 .clock = { "top_ahb", "ispif_ahb", "csi1_ahb", "ahb", 188 "csi1", "csi1_phy", "csi1_pix", "csi1_rdi" }, 189 .clock_rate = { { 0 }, 190 { 0 }, 191 { 0 }, 192 { 0 }, 193 { 100000000, 200000000, 266666667 }, 194 { 0 }, 195 { 0 }, 196 { 0 } }, 197 .reg = { "csid1" }, 198 .interrupt = { "csid1" } 199 }, 200 201 /* CSID2 */ 202 { 203 .regulator = { "vdda" }, 204 .clock = { "top_ahb", "ispif_ahb", "csi2_ahb", "ahb", 205 "csi2", "csi2_phy", "csi2_pix", "csi2_rdi" }, 206 .clock_rate = { { 0 }, 207 { 0 }, 208 { 0 }, 209 { 0 }, 210 { 100000000, 200000000, 266666667 }, 211 { 0 }, 212 { 0 }, 213 { 0 } }, 214 .reg = { "csid2" }, 215 .interrupt = { "csid2" } 216 }, 217 218 /* CSID3 */ 219 { 220 .regulator = { "vdda" }, 221 .clock = { "top_ahb", "ispif_ahb", "csi3_ahb", "ahb", 222 "csi3", "csi3_phy", "csi3_pix", "csi3_rdi" }, 223 .clock_rate = { { 0 }, 224 { 0 }, 225 { 0 }, 226 { 0 }, 227 { 100000000, 200000000, 266666667 }, 228 { 0 }, 229 { 0 }, 230 { 0 } }, 231 .reg = { "csid3" }, 232 .interrupt = { "csid3" } 233 } 234 }; 235 236 static const struct resources_ispif ispif_res_8x96 = { 237 /* ISPIF */ 238 .clock = { "top_ahb", "ahb", "ispif_ahb", 239 "csi0", "csi0_pix", "csi0_rdi", 240 "csi1", "csi1_pix", "csi1_rdi", 241 "csi2", "csi2_pix", "csi2_rdi", 242 "csi3", "csi3_pix", "csi3_rdi" }, 243 .clock_for_reset = { "vfe0", "csi_vfe0", "vfe1", "csi_vfe1" }, 244 .reg = { "ispif", "csi_clk_mux" }, 245 .interrupt = "ispif" 246 }; 247 248 static const struct resources vfe_res_8x96[] = { 249 /* VFE0 */ 250 { 251 .regulator = { NULL }, 252 .clock = { "top_ahb", "ahb", "vfe0", "csi_vfe0", "vfe_ahb", 253 "vfe0_ahb", "vfe_axi", "vfe0_stream"}, 254 .clock_rate = { { 0 }, 255 { 0 }, 256 { 75000000, 100000000, 300000000, 257 320000000, 480000000, 600000000 }, 258 { 0 }, 259 { 0 }, 260 { 0 }, 261 { 0 }, 262 { 0 } }, 263 .reg = { "vfe0" }, 264 .interrupt = { "vfe0" } 265 }, 266 267 /* VFE1 */ 268 { 269 .regulator = { NULL }, 270 .clock = { "top_ahb", "ahb", "vfe1", "csi_vfe1", "vfe_ahb", 271 "vfe1_ahb", "vfe_axi", "vfe1_stream"}, 272 .clock_rate = { { 0 }, 273 { 0 }, 274 { 75000000, 100000000, 300000000, 275 320000000, 480000000, 600000000 }, 276 { 0 }, 277 { 0 }, 278 { 0 }, 279 { 0 }, 280 { 0 } }, 281 .reg = { "vfe1" }, 282 .interrupt = { "vfe1" } 283 } 284 }; 285 286 /* 287 * camss_add_clock_margin - Add margin to clock frequency rate 288 * @rate: Clock frequency rate 289 * 290 * When making calculations with physical clock frequency values 291 * some safety margin must be added. Add it. 292 */ 293 inline void camss_add_clock_margin(u64 *rate) 294 { 295 *rate *= CAMSS_CLOCK_MARGIN_NUMERATOR; 296 *rate = div_u64(*rate, CAMSS_CLOCK_MARGIN_DENOMINATOR); 297 } 298 299 /* 300 * camss_enable_clocks - Enable multiple clocks 301 * @nclocks: Number of clocks in clock array 302 * @clock: Clock array 303 * @dev: Device 304 * 305 * Return 0 on success or a negative error code otherwise 306 */ 307 int camss_enable_clocks(int nclocks, struct camss_clock *clock, 308 struct device *dev) 309 { 310 int ret; 311 int i; 312 313 for (i = 0; i < nclocks; i++) { 314 ret = clk_prepare_enable(clock[i].clk); 315 if (ret) { 316 dev_err(dev, "clock enable failed: %d\n", ret); 317 goto error; 318 } 319 } 320 321 return 0; 322 323 error: 324 for (i--; i >= 0; i--) 325 clk_disable_unprepare(clock[i].clk); 326 327 return ret; 328 } 329 330 /* 331 * camss_disable_clocks - Disable multiple clocks 332 * @nclocks: Number of clocks in clock array 333 * @clock: Clock array 334 */ 335 void camss_disable_clocks(int nclocks, struct camss_clock *clock) 336 { 337 int i; 338 339 for (i = nclocks - 1; i >= 0; i--) 340 clk_disable_unprepare(clock[i].clk); 341 } 342 343 /* 344 * camss_find_sensor - Find a linked media entity which represents a sensor 345 * @entity: Media entity to start searching from 346 * 347 * Return a pointer to sensor media entity or NULL if not found 348 */ 349 struct media_entity *camss_find_sensor(struct media_entity *entity) 350 { 351 struct media_pad *pad; 352 353 while (1) { 354 pad = &entity->pads[0]; 355 if (!(pad->flags & MEDIA_PAD_FL_SINK)) 356 return NULL; 357 358 pad = media_entity_remote_pad(pad); 359 if (!pad || !is_media_entity_v4l2_subdev(pad->entity)) 360 return NULL; 361 362 entity = pad->entity; 363 364 if (entity->function == MEDIA_ENT_F_CAM_SENSOR) 365 return entity; 366 } 367 } 368 369 /* 370 * camss_get_pixel_clock - Get pixel clock rate from sensor 371 * @entity: Media entity in the current pipeline 372 * @pixel_clock: Received pixel clock value 373 * 374 * Return 0 on success or a negative error code otherwise 375 */ 376 int camss_get_pixel_clock(struct media_entity *entity, u32 *pixel_clock) 377 { 378 struct media_entity *sensor; 379 struct v4l2_subdev *subdev; 380 struct v4l2_ctrl *ctrl; 381 382 sensor = camss_find_sensor(entity); 383 if (!sensor) 384 return -ENODEV; 385 386 subdev = media_entity_to_v4l2_subdev(sensor); 387 388 ctrl = v4l2_ctrl_find(subdev->ctrl_handler, V4L2_CID_PIXEL_RATE); 389 390 if (!ctrl) 391 return -EINVAL; 392 393 *pixel_clock = v4l2_ctrl_g_ctrl_int64(ctrl); 394 395 return 0; 396 } 397 398 int camss_pm_domain_on(struct camss *camss, int id) 399 { 400 if (camss->version == CAMSS_8x96) { 401 camss->genpd_link[id] = device_link_add(camss->dev, 402 camss->genpd[id], DL_FLAG_STATELESS | 403 DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE); 404 405 if (!camss->genpd_link[id]) 406 return -EINVAL; 407 } 408 409 return 0; 410 } 411 412 void camss_pm_domain_off(struct camss *camss, int id) 413 { 414 if (camss->version == CAMSS_8x96) 415 device_link_del(camss->genpd_link[id]); 416 } 417 418 /* 419 * camss_of_parse_endpoint_node - Parse port endpoint node 420 * @dev: Device 421 * @node: Device node to be parsed 422 * @csd: Parsed data from port endpoint node 423 * 424 * Return 0 on success or a negative error code on failure 425 */ 426 static int camss_of_parse_endpoint_node(struct device *dev, 427 struct device_node *node, 428 struct camss_async_subdev *csd) 429 { 430 struct csiphy_lanes_cfg *lncfg = &csd->interface.csi2.lane_cfg; 431 struct v4l2_fwnode_bus_mipi_csi2 *mipi_csi2; 432 struct v4l2_fwnode_endpoint vep = { { 0 } }; 433 unsigned int i; 434 435 v4l2_fwnode_endpoint_parse(of_fwnode_handle(node), &vep); 436 437 csd->interface.csiphy_id = vep.base.port; 438 439 mipi_csi2 = &vep.bus.mipi_csi2; 440 lncfg->clk.pos = mipi_csi2->clock_lane; 441 lncfg->clk.pol = mipi_csi2->lane_polarities[0]; 442 lncfg->num_data = mipi_csi2->num_data_lanes; 443 444 lncfg->data = devm_kcalloc(dev, 445 lncfg->num_data, sizeof(*lncfg->data), 446 GFP_KERNEL); 447 if (!lncfg->data) 448 return -ENOMEM; 449 450 for (i = 0; i < lncfg->num_data; i++) { 451 lncfg->data[i].pos = mipi_csi2->data_lanes[i]; 452 lncfg->data[i].pol = mipi_csi2->lane_polarities[i + 1]; 453 } 454 455 return 0; 456 } 457 458 /* 459 * camss_of_parse_ports - Parse ports node 460 * @dev: Device 461 * @notifier: v4l2_device notifier data 462 * 463 * Return number of "port" nodes found in "ports" node 464 */ 465 static int camss_of_parse_ports(struct camss *camss) 466 { 467 struct device *dev = camss->dev; 468 struct device_node *node = NULL; 469 struct device_node *remote = NULL; 470 int ret, num_subdevs = 0; 471 472 for_each_endpoint_of_node(dev->of_node, node) { 473 struct camss_async_subdev *csd; 474 struct v4l2_async_subdev *asd; 475 476 if (!of_device_is_available(node)) 477 continue; 478 479 remote = of_graph_get_remote_port_parent(node); 480 if (!remote) { 481 dev_err(dev, "Cannot get remote parent\n"); 482 ret = -EINVAL; 483 goto err_cleanup; 484 } 485 486 asd = v4l2_async_notifier_add_fwnode_subdev( 487 &camss->notifier, of_fwnode_handle(remote), 488 sizeof(*csd)); 489 of_node_put(remote); 490 if (IS_ERR(asd)) { 491 ret = PTR_ERR(asd); 492 goto err_cleanup; 493 } 494 495 csd = container_of(asd, struct camss_async_subdev, asd); 496 497 ret = camss_of_parse_endpoint_node(dev, node, csd); 498 if (ret < 0) 499 goto err_cleanup; 500 501 num_subdevs++; 502 } 503 504 return num_subdevs; 505 506 err_cleanup: 507 of_node_put(node); 508 return ret; 509 } 510 511 /* 512 * camss_init_subdevices - Initialize subdev structures and resources 513 * @camss: CAMSS device 514 * 515 * Return 0 on success or a negative error code on failure 516 */ 517 static int camss_init_subdevices(struct camss *camss) 518 { 519 const struct resources *csiphy_res; 520 const struct resources *csid_res; 521 const struct resources_ispif *ispif_res; 522 const struct resources *vfe_res; 523 unsigned int i; 524 int ret; 525 526 if (camss->version == CAMSS_8x16) { 527 csiphy_res = csiphy_res_8x16; 528 csid_res = csid_res_8x16; 529 ispif_res = &ispif_res_8x16; 530 vfe_res = vfe_res_8x16; 531 } else if (camss->version == CAMSS_8x96) { 532 csiphy_res = csiphy_res_8x96; 533 csid_res = csid_res_8x96; 534 ispif_res = &ispif_res_8x96; 535 vfe_res = vfe_res_8x96; 536 } else { 537 return -EINVAL; 538 } 539 540 for (i = 0; i < camss->csiphy_num; i++) { 541 ret = msm_csiphy_subdev_init(camss, &camss->csiphy[i], 542 &csiphy_res[i], i); 543 if (ret < 0) { 544 dev_err(camss->dev, 545 "Failed to init csiphy%d sub-device: %d\n", 546 i, ret); 547 return ret; 548 } 549 } 550 551 for (i = 0; i < camss->csid_num; i++) { 552 ret = msm_csid_subdev_init(camss, &camss->csid[i], 553 &csid_res[i], i); 554 if (ret < 0) { 555 dev_err(camss->dev, 556 "Failed to init csid%d sub-device: %d\n", 557 i, ret); 558 return ret; 559 } 560 } 561 562 ret = msm_ispif_subdev_init(&camss->ispif, ispif_res); 563 if (ret < 0) { 564 dev_err(camss->dev, "Failed to init ispif sub-device: %d\n", 565 ret); 566 return ret; 567 } 568 569 for (i = 0; i < camss->vfe_num; i++) { 570 ret = msm_vfe_subdev_init(camss, &camss->vfe[i], 571 &vfe_res[i], i); 572 if (ret < 0) { 573 dev_err(camss->dev, 574 "Fail to init vfe%d sub-device: %d\n", i, ret); 575 return ret; 576 } 577 } 578 579 return 0; 580 } 581 582 /* 583 * camss_register_entities - Register subdev nodes and create links 584 * @camss: CAMSS device 585 * 586 * Return 0 on success or a negative error code on failure 587 */ 588 static int camss_register_entities(struct camss *camss) 589 { 590 int i, j, k; 591 int ret; 592 593 for (i = 0; i < camss->csiphy_num; i++) { 594 ret = msm_csiphy_register_entity(&camss->csiphy[i], 595 &camss->v4l2_dev); 596 if (ret < 0) { 597 dev_err(camss->dev, 598 "Failed to register csiphy%d entity: %d\n", 599 i, ret); 600 goto err_reg_csiphy; 601 } 602 } 603 604 for (i = 0; i < camss->csid_num; i++) { 605 ret = msm_csid_register_entity(&camss->csid[i], 606 &camss->v4l2_dev); 607 if (ret < 0) { 608 dev_err(camss->dev, 609 "Failed to register csid%d entity: %d\n", 610 i, ret); 611 goto err_reg_csid; 612 } 613 } 614 615 ret = msm_ispif_register_entities(&camss->ispif, &camss->v4l2_dev); 616 if (ret < 0) { 617 dev_err(camss->dev, "Failed to register ispif entities: %d\n", 618 ret); 619 goto err_reg_ispif; 620 } 621 622 for (i = 0; i < camss->vfe_num; i++) { 623 ret = msm_vfe_register_entities(&camss->vfe[i], 624 &camss->v4l2_dev); 625 if (ret < 0) { 626 dev_err(camss->dev, 627 "Failed to register vfe%d entities: %d\n", 628 i, ret); 629 goto err_reg_vfe; 630 } 631 } 632 633 for (i = 0; i < camss->csiphy_num; i++) { 634 for (j = 0; j < camss->csid_num; j++) { 635 ret = media_create_pad_link( 636 &camss->csiphy[i].subdev.entity, 637 MSM_CSIPHY_PAD_SRC, 638 &camss->csid[j].subdev.entity, 639 MSM_CSID_PAD_SINK, 640 0); 641 if (ret < 0) { 642 dev_err(camss->dev, 643 "Failed to link %s->%s entities: %d\n", 644 camss->csiphy[i].subdev.entity.name, 645 camss->csid[j].subdev.entity.name, 646 ret); 647 goto err_link; 648 } 649 } 650 } 651 652 for (i = 0; i < camss->csid_num; i++) { 653 for (j = 0; j < camss->ispif.line_num; j++) { 654 ret = media_create_pad_link( 655 &camss->csid[i].subdev.entity, 656 MSM_CSID_PAD_SRC, 657 &camss->ispif.line[j].subdev.entity, 658 MSM_ISPIF_PAD_SINK, 659 0); 660 if (ret < 0) { 661 dev_err(camss->dev, 662 "Failed to link %s->%s entities: %d\n", 663 camss->csid[i].subdev.entity.name, 664 camss->ispif.line[j].subdev.entity.name, 665 ret); 666 goto err_link; 667 } 668 } 669 } 670 671 for (i = 0; i < camss->ispif.line_num; i++) 672 for (k = 0; k < camss->vfe_num; k++) 673 for (j = 0; j < ARRAY_SIZE(camss->vfe[k].line); j++) { 674 ret = media_create_pad_link( 675 &camss->ispif.line[i].subdev.entity, 676 MSM_ISPIF_PAD_SRC, 677 &camss->vfe[k].line[j].subdev.entity, 678 MSM_VFE_PAD_SINK, 679 0); 680 if (ret < 0) { 681 dev_err(camss->dev, 682 "Failed to link %s->%s entities: %d\n", 683 camss->ispif.line[i].subdev.entity.name, 684 camss->vfe[k].line[j].subdev.entity.name, 685 ret); 686 goto err_link; 687 } 688 } 689 690 return 0; 691 692 err_link: 693 i = camss->vfe_num; 694 err_reg_vfe: 695 for (i--; i >= 0; i--) 696 msm_vfe_unregister_entities(&camss->vfe[i]); 697 698 msm_ispif_unregister_entities(&camss->ispif); 699 err_reg_ispif: 700 701 i = camss->csid_num; 702 err_reg_csid: 703 for (i--; i >= 0; i--) 704 msm_csid_unregister_entity(&camss->csid[i]); 705 706 i = camss->csiphy_num; 707 err_reg_csiphy: 708 for (i--; i >= 0; i--) 709 msm_csiphy_unregister_entity(&camss->csiphy[i]); 710 711 return ret; 712 } 713 714 /* 715 * camss_unregister_entities - Unregister subdev nodes 716 * @camss: CAMSS device 717 * 718 * Return 0 on success or a negative error code on failure 719 */ 720 static void camss_unregister_entities(struct camss *camss) 721 { 722 unsigned int i; 723 724 for (i = 0; i < camss->csiphy_num; i++) 725 msm_csiphy_unregister_entity(&camss->csiphy[i]); 726 727 for (i = 0; i < camss->csid_num; i++) 728 msm_csid_unregister_entity(&camss->csid[i]); 729 730 msm_ispif_unregister_entities(&camss->ispif); 731 732 for (i = 0; i < camss->vfe_num; i++) 733 msm_vfe_unregister_entities(&camss->vfe[i]); 734 } 735 736 static int camss_subdev_notifier_bound(struct v4l2_async_notifier *async, 737 struct v4l2_subdev *subdev, 738 struct v4l2_async_subdev *asd) 739 { 740 struct camss *camss = container_of(async, struct camss, notifier); 741 struct camss_async_subdev *csd = 742 container_of(asd, struct camss_async_subdev, asd); 743 u8 id = csd->interface.csiphy_id; 744 struct csiphy_device *csiphy = &camss->csiphy[id]; 745 746 csiphy->cfg.csi2 = &csd->interface.csi2; 747 subdev->host_priv = csiphy; 748 749 return 0; 750 } 751 752 static int camss_subdev_notifier_complete(struct v4l2_async_notifier *async) 753 { 754 struct camss *camss = container_of(async, struct camss, notifier); 755 struct v4l2_device *v4l2_dev = &camss->v4l2_dev; 756 struct v4l2_subdev *sd; 757 int ret; 758 759 list_for_each_entry(sd, &v4l2_dev->subdevs, list) { 760 if (sd->host_priv) { 761 struct media_entity *sensor = &sd->entity; 762 struct csiphy_device *csiphy = 763 (struct csiphy_device *) sd->host_priv; 764 struct media_entity *input = &csiphy->subdev.entity; 765 unsigned int i; 766 767 for (i = 0; i < sensor->num_pads; i++) { 768 if (sensor->pads[i].flags & MEDIA_PAD_FL_SOURCE) 769 break; 770 } 771 if (i == sensor->num_pads) { 772 dev_err(camss->dev, 773 "No source pad in external entity\n"); 774 return -EINVAL; 775 } 776 777 ret = media_create_pad_link(sensor, i, 778 input, MSM_CSIPHY_PAD_SINK, 779 MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED); 780 if (ret < 0) { 781 dev_err(camss->dev, 782 "Failed to link %s->%s entities: %d\n", 783 sensor->name, input->name, ret); 784 return ret; 785 } 786 } 787 } 788 789 ret = v4l2_device_register_subdev_nodes(&camss->v4l2_dev); 790 if (ret < 0) 791 return ret; 792 793 return media_device_register(&camss->media_dev); 794 } 795 796 static const struct v4l2_async_notifier_operations camss_subdev_notifier_ops = { 797 .bound = camss_subdev_notifier_bound, 798 .complete = camss_subdev_notifier_complete, 799 }; 800 801 static const struct media_device_ops camss_media_ops = { 802 .link_notify = v4l2_pipeline_link_notify, 803 }; 804 805 /* 806 * camss_probe - Probe CAMSS platform device 807 * @pdev: Pointer to CAMSS platform device 808 * 809 * Return 0 on success or a negative error code on failure 810 */ 811 static int camss_probe(struct platform_device *pdev) 812 { 813 struct device *dev = &pdev->dev; 814 struct camss *camss; 815 int num_subdevs, ret; 816 817 camss = kzalloc(sizeof(*camss), GFP_KERNEL); 818 if (!camss) 819 return -ENOMEM; 820 821 atomic_set(&camss->ref_count, 0); 822 camss->dev = dev; 823 platform_set_drvdata(pdev, camss); 824 825 if (of_device_is_compatible(dev->of_node, "qcom,msm8916-camss")) { 826 camss->version = CAMSS_8x16; 827 camss->csiphy_num = 2; 828 camss->csid_num = 2; 829 camss->vfe_num = 1; 830 } else if (of_device_is_compatible(dev->of_node, 831 "qcom,msm8996-camss")) { 832 camss->version = CAMSS_8x96; 833 camss->csiphy_num = 3; 834 camss->csid_num = 4; 835 camss->vfe_num = 2; 836 } else { 837 ret = -EINVAL; 838 goto err_free; 839 } 840 841 camss->csiphy = devm_kcalloc(dev, camss->csiphy_num, 842 sizeof(*camss->csiphy), GFP_KERNEL); 843 if (!camss->csiphy) { 844 ret = -ENOMEM; 845 goto err_free; 846 } 847 848 camss->csid = devm_kcalloc(dev, camss->csid_num, sizeof(*camss->csid), 849 GFP_KERNEL); 850 if (!camss->csid) { 851 ret = -ENOMEM; 852 goto err_free; 853 } 854 855 camss->vfe = devm_kcalloc(dev, camss->vfe_num, sizeof(*camss->vfe), 856 GFP_KERNEL); 857 if (!camss->vfe) { 858 ret = -ENOMEM; 859 goto err_free; 860 } 861 862 v4l2_async_notifier_init(&camss->notifier); 863 864 num_subdevs = camss_of_parse_ports(camss); 865 if (num_subdevs < 0) { 866 ret = num_subdevs; 867 goto err_cleanup; 868 } 869 870 ret = camss_init_subdevices(camss); 871 if (ret < 0) 872 goto err_cleanup; 873 874 ret = dma_set_mask_and_coherent(dev, 0xffffffff); 875 if (ret) 876 goto err_cleanup; 877 878 camss->media_dev.dev = camss->dev; 879 strscpy(camss->media_dev.model, "Qualcomm Camera Subsystem", 880 sizeof(camss->media_dev.model)); 881 camss->media_dev.ops = &camss_media_ops; 882 media_device_init(&camss->media_dev); 883 884 camss->v4l2_dev.mdev = &camss->media_dev; 885 ret = v4l2_device_register(camss->dev, &camss->v4l2_dev); 886 if (ret < 0) { 887 dev_err(dev, "Failed to register V4L2 device: %d\n", ret); 888 goto err_cleanup; 889 } 890 891 ret = camss_register_entities(camss); 892 if (ret < 0) 893 goto err_register_entities; 894 895 if (num_subdevs) { 896 camss->notifier.ops = &camss_subdev_notifier_ops; 897 898 ret = v4l2_async_notifier_register(&camss->v4l2_dev, 899 &camss->notifier); 900 if (ret) { 901 dev_err(dev, 902 "Failed to register async subdev nodes: %d\n", 903 ret); 904 goto err_register_subdevs; 905 } 906 } else { 907 ret = v4l2_device_register_subdev_nodes(&camss->v4l2_dev); 908 if (ret < 0) { 909 dev_err(dev, "Failed to register subdev nodes: %d\n", 910 ret); 911 goto err_register_subdevs; 912 } 913 914 ret = media_device_register(&camss->media_dev); 915 if (ret < 0) { 916 dev_err(dev, "Failed to register media device: %d\n", 917 ret); 918 goto err_register_subdevs; 919 } 920 } 921 922 if (camss->version == CAMSS_8x96) { 923 camss->genpd[PM_DOMAIN_VFE0] = dev_pm_domain_attach_by_id( 924 camss->dev, PM_DOMAIN_VFE0); 925 if (IS_ERR(camss->genpd[PM_DOMAIN_VFE0])) 926 return PTR_ERR(camss->genpd[PM_DOMAIN_VFE0]); 927 928 camss->genpd[PM_DOMAIN_VFE1] = dev_pm_domain_attach_by_id( 929 camss->dev, PM_DOMAIN_VFE1); 930 if (IS_ERR(camss->genpd[PM_DOMAIN_VFE1])) { 931 dev_pm_domain_detach(camss->genpd[PM_DOMAIN_VFE0], 932 true); 933 return PTR_ERR(camss->genpd[PM_DOMAIN_VFE1]); 934 } 935 } 936 937 pm_runtime_enable(dev); 938 939 return 0; 940 941 err_register_subdevs: 942 camss_unregister_entities(camss); 943 err_register_entities: 944 v4l2_device_unregister(&camss->v4l2_dev); 945 err_cleanup: 946 v4l2_async_notifier_cleanup(&camss->notifier); 947 err_free: 948 kfree(camss); 949 950 return ret; 951 } 952 953 void camss_delete(struct camss *camss) 954 { 955 v4l2_device_unregister(&camss->v4l2_dev); 956 media_device_unregister(&camss->media_dev); 957 media_device_cleanup(&camss->media_dev); 958 959 pm_runtime_disable(camss->dev); 960 961 if (camss->version == CAMSS_8x96) { 962 dev_pm_domain_detach(camss->genpd[PM_DOMAIN_VFE0], true); 963 dev_pm_domain_detach(camss->genpd[PM_DOMAIN_VFE1], true); 964 } 965 966 kfree(camss); 967 } 968 969 /* 970 * camss_remove - Remove CAMSS platform device 971 * @pdev: Pointer to CAMSS platform device 972 * 973 * Always returns 0. 974 */ 975 static int camss_remove(struct platform_device *pdev) 976 { 977 struct camss *camss = platform_get_drvdata(pdev); 978 979 v4l2_async_notifier_unregister(&camss->notifier); 980 v4l2_async_notifier_cleanup(&camss->notifier); 981 camss_unregister_entities(camss); 982 983 if (atomic_read(&camss->ref_count) == 0) 984 camss_delete(camss); 985 986 return 0; 987 } 988 989 static const struct of_device_id camss_dt_match[] = { 990 { .compatible = "qcom,msm8916-camss" }, 991 { .compatible = "qcom,msm8996-camss" }, 992 { } 993 }; 994 995 MODULE_DEVICE_TABLE(of, camss_dt_match); 996 997 static int __maybe_unused camss_runtime_suspend(struct device *dev) 998 { 999 return 0; 1000 } 1001 1002 static int __maybe_unused camss_runtime_resume(struct device *dev) 1003 { 1004 return 0; 1005 } 1006 1007 static const struct dev_pm_ops camss_pm_ops = { 1008 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 1009 pm_runtime_force_resume) 1010 SET_RUNTIME_PM_OPS(camss_runtime_suspend, camss_runtime_resume, NULL) 1011 }; 1012 1013 static struct platform_driver qcom_camss_driver = { 1014 .probe = camss_probe, 1015 .remove = camss_remove, 1016 .driver = { 1017 .name = "qcom-camss", 1018 .of_match_table = camss_dt_match, 1019 .pm = &camss_pm_ops, 1020 }, 1021 }; 1022 1023 module_platform_driver(qcom_camss_driver); 1024 1025 MODULE_ALIAS("platform:qcom-camss"); 1026 MODULE_DESCRIPTION("Qualcomm Camera Subsystem driver"); 1027 MODULE_AUTHOR("Todor Tomov <todor.tomov@linaro.org>"); 1028 MODULE_LICENSE("GPL v2"); 1029