1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * S5P/EXYNOS4 SoC series camera host interface media device driver 4 * 5 * Copyright (C) 2011 - 2013 Samsung Electronics Co., Ltd. 6 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com> 7 */ 8 9#include <linux/bug.h> 10#include <linux/clk.h> 11#include <linux/clk-provider.h> 12#include <linux/device.h> 13#include <linux/errno.h> 14#include <linux/i2c.h> 15#include <linux/kernel.h> 16#include <linux/list.h> 17#include <linux/module.h> 18#include <linux/of.h> 19#include <linux/of_platform.h> 20#include <linux/of_device.h> 21#include <linux/of_graph.h> 22#include <linux/pinctrl/consumer.h> 23#include <linux/platform_device.h> 24#include <linux/pm_runtime.h> 25#include <linux/types.h> 26#include <linux/slab.h> 27#include <media/v4l2-async.h> 28#include <media/v4l2-ctrls.h> 29#include <media/v4l2-fwnode.h> 30#include <media/media-device.h> 31#include <media/drv-intf/exynos-fimc.h> 32 33#include "media-dev.h" 34#include "fimc-core.h" 35#include "fimc-is.h" 36#include "fimc-lite.h" 37#include "mipi-csis.h" 38 39/* Set up image sensor subdev -> FIMC capture node notifications. */ 40static void __setup_sensor_notification(struct fimc_md *fmd, 41 struct v4l2_subdev *sensor, 42 struct v4l2_subdev *fimc_sd) 43{ 44 struct fimc_source_info *src_inf; 45 struct fimc_sensor_info *md_si; 46 unsigned long flags; 47 48 src_inf = v4l2_get_subdev_hostdata(sensor); 49 if (!src_inf || WARN_ON(fmd == NULL)) 50 return; 51 52 md_si = source_to_sensor_info(src_inf); 53 spin_lock_irqsave(&fmd->slock, flags); 54 md_si->host = v4l2_get_subdevdata(fimc_sd); 55 spin_unlock_irqrestore(&fmd->slock, flags); 56} 57 58/** 59 * fimc_pipeline_prepare - update pipeline information with subdevice pointers 60 * @p: fimc pipeline 61 * @me: media entity terminating the pipeline 62 * 63 * Caller holds the graph mutex. 64 */ 65static void fimc_pipeline_prepare(struct fimc_pipeline *p, 66 struct media_entity *me) 67{ 68 struct fimc_md *fmd = entity_to_fimc_mdev(me); 69 struct v4l2_subdev *sd; 70 struct v4l2_subdev *sensor = NULL; 71 int i; 72 73 for (i = 0; i < IDX_MAX; i++) 74 p->subdevs[i] = NULL; 75 76 while (1) { 77 struct media_pad *pad = NULL; 78 79 /* Find remote source pad */ 80 for (i = 0; i < me->num_pads; i++) { 81 struct media_pad *spad = &me->pads[i]; 82 if (!(spad->flags & MEDIA_PAD_FL_SINK)) 83 continue; 84 pad = media_entity_remote_pad(spad); 85 if (pad) 86 break; 87 } 88 89 if (!pad || !is_media_entity_v4l2_subdev(pad->entity)) 90 break; 91 sd = media_entity_to_v4l2_subdev(pad->entity); 92 93 switch (sd->grp_id) { 94 case GRP_ID_SENSOR: 95 sensor = sd; 96 fallthrough; 97 case GRP_ID_FIMC_IS_SENSOR: 98 p->subdevs[IDX_SENSOR] = sd; 99 break; 100 case GRP_ID_CSIS: 101 p->subdevs[IDX_CSIS] = sd; 102 break; 103 case GRP_ID_FLITE: 104 p->subdevs[IDX_FLITE] = sd; 105 break; 106 case GRP_ID_FIMC: 107 p->subdevs[IDX_FIMC] = sd; 108 break; 109 case GRP_ID_FIMC_IS: 110 p->subdevs[IDX_IS_ISP] = sd; 111 break; 112 default: 113 break; 114 } 115 me = &sd->entity; 116 if (me->num_pads == 1) 117 break; 118 } 119 120 if (sensor && p->subdevs[IDX_FIMC]) 121 __setup_sensor_notification(fmd, sensor, p->subdevs[IDX_FIMC]); 122} 123 124/** 125 * __subdev_set_power - change power state of a single subdev 126 * @sd: subdevice to change power state for 127 * @on: 1 to enable power or 0 to disable 128 * 129 * Return result of s_power subdev operation or -ENXIO if sd argument 130 * is NULL. Return 0 if the subdevice does not implement s_power. 131 */ 132static int __subdev_set_power(struct v4l2_subdev *sd, int on) 133{ 134 int *use_count; 135 int ret; 136 137 if (sd == NULL) 138 return -ENXIO; 139 140 use_count = &sd->entity.use_count; 141 if (on && (*use_count)++ > 0) 142 return 0; 143 else if (!on && (*use_count == 0 || --(*use_count) > 0)) 144 return 0; 145 ret = v4l2_subdev_call(sd, core, s_power, on); 146 147 return ret != -ENOIOCTLCMD ? ret : 0; 148} 149 150/** 151 * fimc_pipeline_s_power - change power state of all pipeline subdevs 152 * @p: fimc device terminating the pipeline 153 * @on: true to power on, false to power off 154 * 155 * Needs to be called with the graph mutex held. 156 */ 157static int fimc_pipeline_s_power(struct fimc_pipeline *p, bool on) 158{ 159 static const u8 seq[2][IDX_MAX - 1] = { 160 { IDX_IS_ISP, IDX_SENSOR, IDX_CSIS, IDX_FLITE }, 161 { IDX_CSIS, IDX_FLITE, IDX_SENSOR, IDX_IS_ISP }, 162 }; 163 int i, ret = 0; 164 165 if (p->subdevs[IDX_SENSOR] == NULL) 166 return -ENXIO; 167 168 for (i = 0; i < IDX_MAX - 1; i++) { 169 unsigned int idx = seq[on][i]; 170 171 ret = __subdev_set_power(p->subdevs[idx], on); 172 173 174 if (ret < 0 && ret != -ENXIO) 175 goto error; 176 } 177 return 0; 178error: 179 for (; i >= 0; i--) { 180 unsigned int idx = seq[on][i]; 181 __subdev_set_power(p->subdevs[idx], !on); 182 } 183 return ret; 184} 185 186/** 187 * __fimc_pipeline_enable - enable power of all pipeline subdevs 188 * and the sensor clock 189 * @ep: video pipeline structure 190 * @fmd: fimc media device 191 * 192 * Called with the graph mutex held. 193 */ 194static int __fimc_pipeline_enable(struct exynos_media_pipeline *ep, 195 struct fimc_md *fmd) 196{ 197 struct fimc_pipeline *p = to_fimc_pipeline(ep); 198 int ret; 199 200 /* Enable PXLASYNC clock if this pipeline includes FIMC-IS */ 201 if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) { 202 ret = clk_prepare_enable(fmd->wbclk[CLK_IDX_WB_B]); 203 if (ret < 0) 204 return ret; 205 } 206 207 ret = fimc_pipeline_s_power(p, 1); 208 if (!ret) 209 return 0; 210 211 if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) 212 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]); 213 214 return ret; 215} 216 217/** 218 * __fimc_pipeline_open - update the pipeline information, enable power 219 * of all pipeline subdevs and the sensor clock 220 * @ep: fimc device terminating the pipeline 221 * @me: media entity to start graph walk with 222 * @prepare: true to walk the current pipeline and acquire all subdevs 223 * 224 * Called with the graph mutex held. 225 */ 226static int __fimc_pipeline_open(struct exynos_media_pipeline *ep, 227 struct media_entity *me, bool prepare) 228{ 229 struct fimc_md *fmd = entity_to_fimc_mdev(me); 230 struct fimc_pipeline *p = to_fimc_pipeline(ep); 231 struct v4l2_subdev *sd; 232 233 if (WARN_ON(p == NULL || me == NULL)) 234 return -EINVAL; 235 236 if (prepare) 237 fimc_pipeline_prepare(p, me); 238 239 sd = p->subdevs[IDX_SENSOR]; 240 if (sd == NULL) { 241 pr_warn("%s(): No sensor subdev\n", __func__); 242 /* 243 * Pipeline open cannot fail so as to make it possible 244 * for the user space to configure the pipeline. 245 */ 246 return 0; 247 } 248 249 return __fimc_pipeline_enable(ep, fmd); 250} 251 252/** 253 * __fimc_pipeline_close - disable the sensor clock and pipeline power 254 * @ep: fimc device terminating the pipeline 255 * 256 * Disable power of all subdevs and turn the external sensor clock off. 257 */ 258static int __fimc_pipeline_close(struct exynos_media_pipeline *ep) 259{ 260 struct fimc_pipeline *p = to_fimc_pipeline(ep); 261 struct v4l2_subdev *sd = p ? p->subdevs[IDX_SENSOR] : NULL; 262 struct fimc_md *fmd; 263 int ret; 264 265 if (sd == NULL) { 266 pr_warn("%s(): No sensor subdev\n", __func__); 267 return 0; 268 } 269 270 ret = fimc_pipeline_s_power(p, 0); 271 272 fmd = entity_to_fimc_mdev(&sd->entity); 273 274 /* Disable PXLASYNC clock if this pipeline includes FIMC-IS */ 275 if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) 276 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]); 277 278 return ret == -ENXIO ? 0 : ret; 279} 280 281/** 282 * __fimc_pipeline_s_stream - call s_stream() on pipeline subdevs 283 * @ep: video pipeline structure 284 * @on: passed as the s_stream() callback argument 285 */ 286static int __fimc_pipeline_s_stream(struct exynos_media_pipeline *ep, bool on) 287{ 288 static const u8 seq[2][IDX_MAX] = { 289 { IDX_FIMC, IDX_SENSOR, IDX_IS_ISP, IDX_CSIS, IDX_FLITE }, 290 { IDX_CSIS, IDX_FLITE, IDX_FIMC, IDX_SENSOR, IDX_IS_ISP }, 291 }; 292 struct fimc_pipeline *p = to_fimc_pipeline(ep); 293 enum fimc_subdev_index sd_id; 294 int i, ret = 0; 295 296 if (p->subdevs[IDX_SENSOR] == NULL) { 297 struct fimc_md *fmd; 298 struct v4l2_subdev *sd = p->subdevs[IDX_CSIS]; 299 300 if (!sd) 301 sd = p->subdevs[IDX_FIMC]; 302 303 if (!sd) { 304 /* 305 * If neither CSIS nor FIMC was set up, 306 * it's impossible to have any sensors 307 */ 308 return -ENODEV; 309 } 310 311 fmd = entity_to_fimc_mdev(&sd->entity); 312 313 if (!fmd->user_subdev_api) { 314 /* 315 * Sensor must be already discovered if we 316 * aren't in the user_subdev_api mode 317 */ 318 return -ENODEV; 319 } 320 321 /* Get pipeline sink entity */ 322 if (p->subdevs[IDX_FIMC]) 323 sd_id = IDX_FIMC; 324 else if (p->subdevs[IDX_IS_ISP]) 325 sd_id = IDX_IS_ISP; 326 else if (p->subdevs[IDX_FLITE]) 327 sd_id = IDX_FLITE; 328 else 329 return -ENODEV; 330 331 /* 332 * Sensor could have been linked between open and STREAMON - 333 * check if this is the case. 334 */ 335 fimc_pipeline_prepare(p, &p->subdevs[sd_id]->entity); 336 337 if (p->subdevs[IDX_SENSOR] == NULL) 338 return -ENODEV; 339 340 ret = __fimc_pipeline_enable(ep, fmd); 341 if (ret < 0) 342 return ret; 343 344 } 345 346 for (i = 0; i < IDX_MAX; i++) { 347 unsigned int idx = seq[on][i]; 348 349 ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on); 350 351 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) 352 goto error; 353 } 354 355 return 0; 356error: 357 fimc_pipeline_s_power(p, !on); 358 for (; i >= 0; i--) { 359 unsigned int idx = seq[on][i]; 360 v4l2_subdev_call(p->subdevs[idx], video, s_stream, !on); 361 } 362 return ret; 363} 364 365/* Media pipeline operations for the FIMC/FIMC-LITE video device driver */ 366static const struct exynos_media_pipeline_ops fimc_pipeline_ops = { 367 .open = __fimc_pipeline_open, 368 .close = __fimc_pipeline_close, 369 .set_stream = __fimc_pipeline_s_stream, 370}; 371 372static struct exynos_media_pipeline *fimc_md_pipeline_create( 373 struct fimc_md *fmd) 374{ 375 struct fimc_pipeline *p; 376 377 p = kzalloc(sizeof(*p), GFP_KERNEL); 378 if (!p) 379 return NULL; 380 381 list_add_tail(&p->list, &fmd->pipelines); 382 383 p->ep.ops = &fimc_pipeline_ops; 384 return &p->ep; 385} 386 387static void fimc_md_pipelines_free(struct fimc_md *fmd) 388{ 389 while (!list_empty(&fmd->pipelines)) { 390 struct fimc_pipeline *p; 391 392 p = list_entry(fmd->pipelines.next, typeof(*p), list); 393 list_del(&p->list); 394 kfree(p); 395 } 396} 397 398static int fimc_md_parse_one_endpoint(struct fimc_md *fmd, 399 struct device_node *ep) 400{ 401 int index = fmd->num_sensors; 402 struct fimc_source_info *pd = &fmd->sensor[index].pdata; 403 struct device_node *rem, *np; 404 struct v4l2_async_subdev *asd; 405 struct v4l2_fwnode_endpoint endpoint = { .bus_type = 0 }; 406 int ret; 407 408 ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &endpoint); 409 if (ret) { 410 of_node_put(ep); 411 return ret; 412 } 413 414 if (WARN_ON(endpoint.base.port == 0) || index >= FIMC_MAX_SENSORS) { 415 of_node_put(ep); 416 return -EINVAL; 417 } 418 419 pd->mux_id = (endpoint.base.port - 1) & 0x1; 420 421 rem = of_graph_get_remote_port_parent(ep); 422 if (rem == NULL) { 423 v4l2_info(&fmd->v4l2_dev, "Remote device at %pOF not found\n", 424 ep); 425 of_node_put(ep); 426 return 0; 427 } 428 429 if (fimc_input_is_parallel(endpoint.base.port)) { 430 if (endpoint.bus_type == V4L2_MBUS_PARALLEL) 431 pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_601; 432 else 433 pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_656; 434 pd->flags = endpoint.bus.parallel.flags; 435 } else if (fimc_input_is_mipi_csi(endpoint.base.port)) { 436 /* 437 * MIPI CSI-2: only input mux selection and 438 * the sensor's clock frequency is needed. 439 */ 440 pd->sensor_bus_type = FIMC_BUS_TYPE_MIPI_CSI2; 441 } else { 442 v4l2_err(&fmd->v4l2_dev, "Wrong port id (%u) at node %pOF\n", 443 endpoint.base.port, rem); 444 } 445 /* 446 * For FIMC-IS handled sensors, that are placed under i2c-isp device 447 * node, FIMC is connected to the FIMC-IS through its ISP Writeback 448 * input. Sensors are attached to the FIMC-LITE hostdata interface 449 * directly or through MIPI-CSIS, depending on the external media bus 450 * used. This needs to be handled in a more reliable way, not by just 451 * checking parent's node name. 452 */ 453 np = of_get_parent(rem); 454 of_node_put(rem); 455 456 if (of_node_name_eq(np, "i2c-isp")) 457 pd->fimc_bus_type = FIMC_BUS_TYPE_ISP_WRITEBACK; 458 else 459 pd->fimc_bus_type = pd->sensor_bus_type; 460 of_node_put(np); 461 462 if (WARN_ON(index >= ARRAY_SIZE(fmd->sensor))) { 463 of_node_put(ep); 464 return -EINVAL; 465 } 466 467 asd = v4l2_async_notifier_add_fwnode_remote_subdev( 468 &fmd->subdev_notifier, of_fwnode_handle(ep), sizeof(*asd)); 469 470 of_node_put(ep); 471 472 if (IS_ERR(asd)) 473 return PTR_ERR(asd); 474 475 fmd->sensor[index].asd = asd; 476 fmd->num_sensors++; 477 478 return 0; 479} 480 481/* Parse port node and register as a sub-device any sensor specified there. */ 482static int fimc_md_parse_port_node(struct fimc_md *fmd, 483 struct device_node *port) 484{ 485 struct device_node *ep; 486 int ret; 487 488 for_each_child_of_node(port, ep) { 489 ret = fimc_md_parse_one_endpoint(fmd, ep); 490 if (ret < 0) 491 return ret; 492 } 493 494 return 0; 495} 496 497/* Register all SoC external sub-devices */ 498static int fimc_md_register_sensor_entities(struct fimc_md *fmd) 499{ 500 struct device_node *parent = fmd->pdev->dev.of_node; 501 struct device_node *ports = NULL; 502 struct device_node *node; 503 int ret; 504 505 /* 506 * Runtime resume one of the FIMC entities to make sure 507 * the sclk_cam clocks are not globally disabled. 508 */ 509 if (!fmd->pmf) 510 return -ENXIO; 511 512 ret = pm_runtime_resume_and_get(fmd->pmf); 513 if (ret < 0) 514 return ret; 515 516 fmd->num_sensors = 0; 517 518 /* Attach sensors linked to MIPI CSI-2 receivers */ 519 for_each_available_child_of_node(parent, node) { 520 struct device_node *port; 521 522 if (!of_node_name_eq(node, "csis")) 523 continue; 524 /* The csis node can have only port subnode. */ 525 port = of_get_next_child(node, NULL); 526 if (!port) 527 continue; 528 529 ret = fimc_md_parse_port_node(fmd, port); 530 of_node_put(port); 531 if (ret < 0) { 532 of_node_put(node); 533 goto cleanup; 534 } 535 } 536 537 /* Attach sensors listed in the parallel-ports node */ 538 ports = of_get_child_by_name(parent, "parallel-ports"); 539 if (!ports) 540 goto rpm_put; 541 542 for_each_child_of_node(ports, node) { 543 ret = fimc_md_parse_port_node(fmd, node); 544 if (ret < 0) { 545 of_node_put(node); 546 goto cleanup; 547 } 548 } 549 of_node_put(ports); 550 551rpm_put: 552 pm_runtime_put(fmd->pmf); 553 return 0; 554 555cleanup: 556 of_node_put(ports); 557 v4l2_async_notifier_cleanup(&fmd->subdev_notifier); 558 pm_runtime_put(fmd->pmf); 559 return ret; 560} 561 562static int __of_get_csis_id(struct device_node *np) 563{ 564 u32 reg = 0; 565 566 np = of_get_child_by_name(np, "port"); 567 if (!np) 568 return -EINVAL; 569 of_property_read_u32(np, "reg", ®); 570 of_node_put(np); 571 return reg - FIMC_INPUT_MIPI_CSI2_0; 572} 573 574/* 575 * MIPI-CSIS, FIMC and FIMC-LITE platform devices registration. 576 */ 577static int register_fimc_lite_entity(struct fimc_md *fmd, 578 struct fimc_lite *fimc_lite) 579{ 580 struct v4l2_subdev *sd; 581 struct exynos_media_pipeline *ep; 582 int ret; 583 584 if (WARN_ON(fimc_lite->index >= FIMC_LITE_MAX_DEVS || 585 fmd->fimc_lite[fimc_lite->index])) 586 return -EBUSY; 587 588 sd = &fimc_lite->subdev; 589 sd->grp_id = GRP_ID_FLITE; 590 591 ep = fimc_md_pipeline_create(fmd); 592 if (!ep) 593 return -ENOMEM; 594 595 v4l2_set_subdev_hostdata(sd, ep); 596 597 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); 598 if (!ret) 599 fmd->fimc_lite[fimc_lite->index] = fimc_lite; 600 else 601 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.LITE%d\n", 602 fimc_lite->index); 603 return ret; 604} 605 606static int register_fimc_entity(struct fimc_md *fmd, struct fimc_dev *fimc) 607{ 608 struct v4l2_subdev *sd; 609 struct exynos_media_pipeline *ep; 610 int ret; 611 612 if (WARN_ON(fimc->id >= FIMC_MAX_DEVS || fmd->fimc[fimc->id])) 613 return -EBUSY; 614 615 sd = &fimc->vid_cap.subdev; 616 sd->grp_id = GRP_ID_FIMC; 617 618 ep = fimc_md_pipeline_create(fmd); 619 if (!ep) 620 return -ENOMEM; 621 622 v4l2_set_subdev_hostdata(sd, ep); 623 624 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); 625 if (!ret) { 626 if (!fmd->pmf && fimc->pdev) 627 fmd->pmf = &fimc->pdev->dev; 628 fmd->fimc[fimc->id] = fimc; 629 fimc->vid_cap.user_subdev_api = fmd->user_subdev_api; 630 } else { 631 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n", 632 fimc->id, ret); 633 } 634 return ret; 635} 636 637static int register_csis_entity(struct fimc_md *fmd, 638 struct platform_device *pdev, 639 struct v4l2_subdev *sd) 640{ 641 struct device_node *node = pdev->dev.of_node; 642 int id, ret; 643 644 id = node ? __of_get_csis_id(node) : max(0, pdev->id); 645 646 if (WARN_ON(id < 0 || id >= CSIS_MAX_ENTITIES)) 647 return -ENOENT; 648 649 if (WARN_ON(fmd->csis[id].sd)) 650 return -EBUSY; 651 652 sd->grp_id = GRP_ID_CSIS; 653 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); 654 if (!ret) 655 fmd->csis[id].sd = sd; 656 else 657 v4l2_err(&fmd->v4l2_dev, 658 "Failed to register MIPI-CSIS.%d (%d)\n", id, ret); 659 return ret; 660} 661 662static int register_fimc_is_entity(struct fimc_md *fmd, struct fimc_is *is) 663{ 664 struct v4l2_subdev *sd = &is->isp.subdev; 665 struct exynos_media_pipeline *ep; 666 int ret; 667 668 /* Allocate pipeline object for the ISP capture video node. */ 669 ep = fimc_md_pipeline_create(fmd); 670 if (!ep) 671 return -ENOMEM; 672 673 v4l2_set_subdev_hostdata(sd, ep); 674 675 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); 676 if (ret) { 677 v4l2_err(&fmd->v4l2_dev, 678 "Failed to register FIMC-ISP (%d)\n", ret); 679 return ret; 680 } 681 682 fmd->fimc_is = is; 683 return 0; 684} 685 686static int fimc_md_register_platform_entity(struct fimc_md *fmd, 687 struct platform_device *pdev, 688 int plat_entity) 689{ 690 struct device *dev = &pdev->dev; 691 int ret = -EPROBE_DEFER; 692 void *drvdata; 693 694 /* Lock to ensure dev->driver won't change. */ 695 device_lock(dev); 696 697 if (!dev->driver || !try_module_get(dev->driver->owner)) 698 goto dev_unlock; 699 700 drvdata = dev_get_drvdata(dev); 701 /* Some subdev didn't probe successfully id drvdata is NULL */ 702 if (drvdata) { 703 switch (plat_entity) { 704 case IDX_FIMC: 705 ret = register_fimc_entity(fmd, drvdata); 706 break; 707 case IDX_FLITE: 708 ret = register_fimc_lite_entity(fmd, drvdata); 709 break; 710 case IDX_CSIS: 711 ret = register_csis_entity(fmd, pdev, drvdata); 712 break; 713 case IDX_IS_ISP: 714 ret = register_fimc_is_entity(fmd, drvdata); 715 break; 716 default: 717 ret = -ENODEV; 718 } 719 } 720 721 module_put(dev->driver->owner); 722dev_unlock: 723 device_unlock(dev); 724 if (ret == -EPROBE_DEFER) 725 dev_info(&fmd->pdev->dev, "deferring %s device registration\n", 726 dev_name(dev)); 727 else if (ret < 0) 728 dev_err(&fmd->pdev->dev, "%s device registration failed (%d)\n", 729 dev_name(dev), ret); 730 return ret; 731} 732 733/* Register FIMC, FIMC-LITE and CSIS media entities */ 734static int fimc_md_register_platform_entities(struct fimc_md *fmd, 735 struct device_node *parent) 736{ 737 struct device_node *node; 738 int ret = 0; 739 740 for_each_available_child_of_node(parent, node) { 741 struct platform_device *pdev; 742 int plat_entity = -1; 743 744 pdev = of_find_device_by_node(node); 745 if (!pdev) 746 continue; 747 748 /* If driver of any entity isn't ready try all again later. */ 749 if (of_node_name_eq(node, CSIS_OF_NODE_NAME)) 750 plat_entity = IDX_CSIS; 751 else if (of_node_name_eq(node, FIMC_IS_OF_NODE_NAME)) 752 plat_entity = IDX_IS_ISP; 753 else if (of_node_name_eq(node, FIMC_LITE_OF_NODE_NAME)) 754 plat_entity = IDX_FLITE; 755 else if (of_node_name_eq(node, FIMC_OF_NODE_NAME) && 756 !of_property_read_bool(node, "samsung,lcd-wb")) 757 plat_entity = IDX_FIMC; 758 759 if (plat_entity >= 0) 760 ret = fimc_md_register_platform_entity(fmd, pdev, 761 plat_entity); 762 put_device(&pdev->dev); 763 if (ret < 0) { 764 of_node_put(node); 765 break; 766 } 767 } 768 769 return ret; 770} 771 772static void fimc_md_unregister_entities(struct fimc_md *fmd) 773{ 774 int i; 775 776 for (i = 0; i < FIMC_MAX_DEVS; i++) { 777 struct fimc_dev *dev = fmd->fimc[i]; 778 if (dev == NULL) 779 continue; 780 v4l2_device_unregister_subdev(&dev->vid_cap.subdev); 781 dev->vid_cap.ve.pipe = NULL; 782 fmd->fimc[i] = NULL; 783 } 784 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) { 785 struct fimc_lite *dev = fmd->fimc_lite[i]; 786 if (dev == NULL) 787 continue; 788 v4l2_device_unregister_subdev(&dev->subdev); 789 dev->ve.pipe = NULL; 790 fmd->fimc_lite[i] = NULL; 791 } 792 for (i = 0; i < CSIS_MAX_ENTITIES; i++) { 793 if (fmd->csis[i].sd == NULL) 794 continue; 795 v4l2_device_unregister_subdev(fmd->csis[i].sd); 796 fmd->csis[i].sd = NULL; 797 } 798 799 if (fmd->fimc_is) 800 v4l2_device_unregister_subdev(&fmd->fimc_is->isp.subdev); 801 802 v4l2_info(&fmd->v4l2_dev, "Unregistered all entities\n"); 803} 804 805/** 806 * __fimc_md_create_fimc_links - create links to all FIMC entities 807 * @fmd: fimc media device 808 * @source: the source entity to create links to all fimc entities from 809 * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null 810 * @pad: the source entity pad index 811 * @link_mask: bitmask of the fimc devices for which link should be enabled 812 */ 813static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd, 814 struct media_entity *source, 815 struct v4l2_subdev *sensor, 816 int pad, int link_mask) 817{ 818 struct fimc_source_info *si = NULL; 819 struct media_entity *sink; 820 unsigned int flags = 0; 821 int i, ret = 0; 822 823 if (sensor) { 824 si = v4l2_get_subdev_hostdata(sensor); 825 /* Skip direct FIMC links in the logical FIMC-IS sensor path */ 826 if (si && si->fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK) 827 ret = 1; 828 } 829 830 for (i = 0; !ret && i < FIMC_MAX_DEVS; i++) { 831 if (!fmd->fimc[i]) 832 continue; 833 /* 834 * Some FIMC variants are not fitted with camera capture 835 * interface. Skip creating a link from sensor for those. 836 */ 837 if (!fmd->fimc[i]->variant->has_cam_if) 838 continue; 839 840 flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0; 841 842 sink = &fmd->fimc[i]->vid_cap.subdev.entity; 843 ret = media_create_pad_link(source, pad, sink, 844 FIMC_SD_PAD_SINK_CAM, flags); 845 if (ret) 846 return ret; 847 848 /* Notify FIMC capture subdev entity */ 849 ret = media_entity_call(sink, link_setup, &sink->pads[0], 850 &source->pads[pad], flags); 851 if (ret) 852 break; 853 854 v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]\n", 855 source->name, flags ? '=' : '-', sink->name); 856 } 857 858 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) { 859 if (!fmd->fimc_lite[i]) 860 continue; 861 862 sink = &fmd->fimc_lite[i]->subdev.entity; 863 ret = media_create_pad_link(source, pad, sink, 864 FLITE_SD_PAD_SINK, 0); 865 if (ret) 866 return ret; 867 868 /* Notify FIMC-LITE subdev entity */ 869 ret = media_entity_call(sink, link_setup, &sink->pads[0], 870 &source->pads[pad], 0); 871 if (ret) 872 break; 873 874 v4l2_info(&fmd->v4l2_dev, "created link [%s] -> [%s]\n", 875 source->name, sink->name); 876 } 877 return 0; 878} 879 880/* Create links from FIMC-LITE source pads to other entities */ 881static int __fimc_md_create_flite_source_links(struct fimc_md *fmd) 882{ 883 struct media_entity *source, *sink; 884 int i, ret = 0; 885 886 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) { 887 struct fimc_lite *fimc = fmd->fimc_lite[i]; 888 889 if (fimc == NULL) 890 continue; 891 892 source = &fimc->subdev.entity; 893 sink = &fimc->ve.vdev.entity; 894 /* FIMC-LITE's subdev and video node */ 895 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_DMA, 896 sink, 0, 0); 897 if (ret) 898 break; 899 /* Link from FIMC-LITE to IS-ISP subdev */ 900 sink = &fmd->fimc_is->isp.subdev.entity; 901 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_ISP, 902 sink, 0, 0); 903 if (ret) 904 break; 905 } 906 907 return ret; 908} 909 910/* Create FIMC-IS links */ 911static int __fimc_md_create_fimc_is_links(struct fimc_md *fmd) 912{ 913 struct fimc_isp *isp = &fmd->fimc_is->isp; 914 struct media_entity *source, *sink; 915 int i, ret; 916 917 source = &isp->subdev.entity; 918 919 for (i = 0; i < FIMC_MAX_DEVS; i++) { 920 if (fmd->fimc[i] == NULL) 921 continue; 922 923 /* Link from FIMC-IS-ISP subdev to FIMC */ 924 sink = &fmd->fimc[i]->vid_cap.subdev.entity; 925 ret = media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_FIFO, 926 sink, FIMC_SD_PAD_SINK_FIFO, 0); 927 if (ret) 928 return ret; 929 } 930 931 /* Link from FIMC-IS-ISP subdev to fimc-is-isp.capture video node */ 932 sink = &isp->video_capture.ve.vdev.entity; 933 934 /* Skip this link if the fimc-is-isp video node driver isn't built-in */ 935 if (sink->num_pads == 0) 936 return 0; 937 938 return media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_DMA, 939 sink, 0, 0); 940} 941 942/** 943 * fimc_md_create_links - create default links between registered entities 944 * @fmd: fimc media device 945 * 946 * Parallel interface sensor entities are connected directly to FIMC capture 947 * entities. The sensors using MIPI CSIS bus are connected through immutable 948 * link with CSI receiver entity specified by mux_id. Any registered CSIS 949 * entity has a link to each registered FIMC capture entity. Enabled links 950 * are created by default between each subsequent registered sensor and 951 * subsequent FIMC capture entity. The number of default active links is 952 * determined by the number of available sensors or FIMC entities, 953 * whichever is less. 954 */ 955static int fimc_md_create_links(struct fimc_md *fmd) 956{ 957 struct v4l2_subdev *csi_sensors[CSIS_MAX_ENTITIES] = { NULL }; 958 struct v4l2_subdev *sensor, *csis; 959 struct fimc_source_info *pdata; 960 struct media_entity *source, *sink; 961 int i, pad, fimc_id = 0, ret = 0; 962 u32 flags, link_mask = 0; 963 964 for (i = 0; i < fmd->num_sensors; i++) { 965 if (fmd->sensor[i].subdev == NULL) 966 continue; 967 968 sensor = fmd->sensor[i].subdev; 969 pdata = v4l2_get_subdev_hostdata(sensor); 970 if (!pdata) 971 continue; 972 973 source = NULL; 974 975 switch (pdata->sensor_bus_type) { 976 case FIMC_BUS_TYPE_MIPI_CSI2: 977 if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES, 978 "Wrong CSI channel id: %d\n", pdata->mux_id)) 979 return -EINVAL; 980 981 csis = fmd->csis[pdata->mux_id].sd; 982 if (WARN(csis == NULL, 983 "MIPI-CSI interface specified but s5p-csis module is not loaded!\n")) 984 return -EINVAL; 985 986 pad = sensor->entity.num_pads - 1; 987 ret = media_create_pad_link(&sensor->entity, pad, 988 &csis->entity, CSIS_PAD_SINK, 989 MEDIA_LNK_FL_IMMUTABLE | 990 MEDIA_LNK_FL_ENABLED); 991 if (ret) 992 return ret; 993 994 v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]\n", 995 sensor->entity.name, csis->entity.name); 996 997 source = NULL; 998 csi_sensors[pdata->mux_id] = sensor; 999 break; 1000 1001 case FIMC_BUS_TYPE_ITU_601...FIMC_BUS_TYPE_ITU_656: 1002 source = &sensor->entity; 1003 pad = 0; 1004 break; 1005 1006 default: 1007 v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n", 1008 pdata->sensor_bus_type); 1009 return -EINVAL; 1010 } 1011 if (source == NULL) 1012 continue; 1013 1014 link_mask = 1 << fimc_id++; 1015 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor, 1016 pad, link_mask); 1017 } 1018 1019 for (i = 0; i < CSIS_MAX_ENTITIES; i++) { 1020 if (fmd->csis[i].sd == NULL) 1021 continue; 1022 1023 source = &fmd->csis[i].sd->entity; 1024 pad = CSIS_PAD_SOURCE; 1025 sensor = csi_sensors[i]; 1026 1027 link_mask = 1 << fimc_id++; 1028 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor, 1029 pad, link_mask); 1030 } 1031 1032 /* Create immutable links between each FIMC's subdev and video node */ 1033 flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED; 1034 for (i = 0; i < FIMC_MAX_DEVS; i++) { 1035 if (!fmd->fimc[i]) 1036 continue; 1037 1038 source = &fmd->fimc[i]->vid_cap.subdev.entity; 1039 sink = &fmd->fimc[i]->vid_cap.ve.vdev.entity; 1040 1041 ret = media_create_pad_link(source, FIMC_SD_PAD_SOURCE, 1042 sink, 0, flags); 1043 if (ret) 1044 break; 1045 } 1046 1047 ret = __fimc_md_create_flite_source_links(fmd); 1048 if (ret < 0) 1049 return ret; 1050 1051 if (fmd->use_isp) 1052 ret = __fimc_md_create_fimc_is_links(fmd); 1053 1054 return ret; 1055} 1056 1057/* 1058 * The peripheral sensor and CAM_BLK (PIXELASYNCMx) clocks management. 1059 */ 1060static void fimc_md_put_clocks(struct fimc_md *fmd) 1061{ 1062 int i = FIMC_MAX_CAMCLKS; 1063 1064 while (--i >= 0) { 1065 if (IS_ERR(fmd->camclk[i].clock)) 1066 continue; 1067 clk_put(fmd->camclk[i].clock); 1068 fmd->camclk[i].clock = ERR_PTR(-EINVAL); 1069 } 1070 1071 /* Writeback (PIXELASYNCMx) clocks */ 1072 for (i = 0; i < FIMC_MAX_WBCLKS; i++) { 1073 if (IS_ERR(fmd->wbclk[i])) 1074 continue; 1075 clk_put(fmd->wbclk[i]); 1076 fmd->wbclk[i] = ERR_PTR(-EINVAL); 1077 } 1078} 1079 1080static int fimc_md_get_clocks(struct fimc_md *fmd) 1081{ 1082 struct device *dev = &fmd->pdev->dev; 1083 char clk_name[32]; 1084 struct clk *clock; 1085 int i, ret = 0; 1086 1087 for (i = 0; i < FIMC_MAX_CAMCLKS; i++) 1088 fmd->camclk[i].clock = ERR_PTR(-EINVAL); 1089 1090 for (i = 0; i < FIMC_MAX_CAMCLKS; i++) { 1091 snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i); 1092 clock = clk_get(dev, clk_name); 1093 1094 if (IS_ERR(clock)) { 1095 dev_err(dev, "Failed to get clock: %s\n", clk_name); 1096 ret = PTR_ERR(clock); 1097 break; 1098 } 1099 fmd->camclk[i].clock = clock; 1100 } 1101 if (ret) 1102 fimc_md_put_clocks(fmd); 1103 1104 if (!fmd->use_isp) 1105 return 0; 1106 /* 1107 * For now get only PIXELASYNCM1 clock (Writeback B/ISP), 1108 * leave PIXELASYNCM0 out for the LCD Writeback driver. 1109 */ 1110 fmd->wbclk[CLK_IDX_WB_A] = ERR_PTR(-EINVAL); 1111 1112 for (i = CLK_IDX_WB_B; i < FIMC_MAX_WBCLKS; i++) { 1113 snprintf(clk_name, sizeof(clk_name), "pxl_async%u", i); 1114 clock = clk_get(dev, clk_name); 1115 if (IS_ERR(clock)) { 1116 v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s\n", 1117 clk_name); 1118 ret = PTR_ERR(clock); 1119 break; 1120 } 1121 fmd->wbclk[i] = clock; 1122 } 1123 if (ret) 1124 fimc_md_put_clocks(fmd); 1125 1126 return ret; 1127} 1128 1129static int __fimc_md_modify_pipeline(struct media_entity *entity, bool enable) 1130{ 1131 struct exynos_video_entity *ve; 1132 struct fimc_pipeline *p; 1133 struct video_device *vdev; 1134 int ret; 1135 1136 vdev = media_entity_to_video_device(entity); 1137 if (vdev->entity.use_count == 0) 1138 return 0; 1139 1140 ve = vdev_to_exynos_video_entity(vdev); 1141 p = to_fimc_pipeline(ve->pipe); 1142 /* 1143 * Nothing to do if we are disabling the pipeline, some link 1144 * has been disconnected and p->subdevs array is cleared now. 1145 */ 1146 if (!enable && p->subdevs[IDX_SENSOR] == NULL) 1147 return 0; 1148 1149 if (enable) 1150 ret = __fimc_pipeline_open(ve->pipe, entity, true); 1151 else 1152 ret = __fimc_pipeline_close(ve->pipe); 1153 1154 if (ret == 0 && !enable) 1155 memset(p->subdevs, 0, sizeof(p->subdevs)); 1156 1157 return ret; 1158} 1159 1160/* Locking: called with entity->graph_obj.mdev->graph_mutex mutex held. */ 1161static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable, 1162 struct media_graph *graph) 1163{ 1164 struct media_entity *entity_err = entity; 1165 int ret; 1166 1167 /* 1168 * Walk current graph and call the pipeline open/close routine for each 1169 * opened video node that belongs to the graph of entities connected 1170 * through active links. This is needed as we cannot power on/off the 1171 * subdevs in random order. 1172 */ 1173 media_graph_walk_start(graph, entity); 1174 1175 while ((entity = media_graph_walk_next(graph))) { 1176 if (!is_media_entity_v4l2_video_device(entity)) 1177 continue; 1178 1179 ret = __fimc_md_modify_pipeline(entity, enable); 1180 1181 if (ret < 0) 1182 goto err; 1183 } 1184 1185 return 0; 1186 1187err: 1188 media_graph_walk_start(graph, entity_err); 1189 1190 while ((entity_err = media_graph_walk_next(graph))) { 1191 if (!is_media_entity_v4l2_video_device(entity_err)) 1192 continue; 1193 1194 __fimc_md_modify_pipeline(entity_err, !enable); 1195 1196 if (entity_err == entity) 1197 break; 1198 } 1199 1200 return ret; 1201} 1202 1203static int fimc_md_link_notify(struct media_link *link, unsigned int flags, 1204 unsigned int notification) 1205{ 1206 struct media_graph *graph = 1207 &container_of(link->graph_obj.mdev, struct fimc_md, 1208 media_dev)->link_setup_graph; 1209 struct media_entity *sink = link->sink->entity; 1210 int ret = 0; 1211 1212 /* Before link disconnection */ 1213 if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) { 1214 ret = media_graph_walk_init(graph, 1215 link->graph_obj.mdev); 1216 if (ret) 1217 return ret; 1218 if (!(flags & MEDIA_LNK_FL_ENABLED)) 1219 ret = __fimc_md_modify_pipelines(sink, false, graph); 1220#if 0 1221 else 1222 /* TODO: Link state change validation */ 1223#endif 1224 /* After link activation */ 1225 } else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH) { 1226 if (link->flags & MEDIA_LNK_FL_ENABLED) 1227 ret = __fimc_md_modify_pipelines(sink, true, graph); 1228 media_graph_walk_cleanup(graph); 1229 } 1230 1231 return ret ? -EPIPE : 0; 1232} 1233 1234static const struct media_device_ops fimc_md_ops = { 1235 .link_notify = fimc_md_link_notify, 1236}; 1237 1238static ssize_t fimc_md_sysfs_show(struct device *dev, 1239 struct device_attribute *attr, char *buf) 1240{ 1241 struct fimc_md *fmd = dev_get_drvdata(dev); 1242 1243 if (fmd->user_subdev_api) 1244 return strscpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE); 1245 1246 return strscpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE); 1247} 1248 1249static ssize_t fimc_md_sysfs_store(struct device *dev, 1250 struct device_attribute *attr, 1251 const char *buf, size_t count) 1252{ 1253 struct fimc_md *fmd = dev_get_drvdata(dev); 1254 bool subdev_api; 1255 int i; 1256 1257 if (!strcmp(buf, "vid-dev\n")) 1258 subdev_api = false; 1259 else if (!strcmp(buf, "sub-dev\n")) 1260 subdev_api = true; 1261 else 1262 return count; 1263 1264 fmd->user_subdev_api = subdev_api; 1265 for (i = 0; i < FIMC_MAX_DEVS; i++) 1266 if (fmd->fimc[i]) 1267 fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api; 1268 return count; 1269} 1270/* 1271 * This device attribute is to select video pipeline configuration method. 1272 * There are following valid values: 1273 * vid-dev - for V4L2 video node API only, subdevice will be configured 1274 * by the host driver. 1275 * sub-dev - for media controller API, subdevs must be configured in user 1276 * space before starting streaming. 1277 */ 1278static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO, 1279 fimc_md_sysfs_show, fimc_md_sysfs_store); 1280 1281static int cam_clk_prepare(struct clk_hw *hw) 1282{ 1283 struct cam_clk *camclk = to_cam_clk(hw); 1284 1285 if (camclk->fmd->pmf == NULL) 1286 return -ENODEV; 1287 1288 return pm_runtime_resume_and_get(camclk->fmd->pmf); 1289} 1290 1291static void cam_clk_unprepare(struct clk_hw *hw) 1292{ 1293 struct cam_clk *camclk = to_cam_clk(hw); 1294 1295 if (camclk->fmd->pmf == NULL) 1296 return; 1297 1298 pm_runtime_put_sync(camclk->fmd->pmf); 1299} 1300 1301static const struct clk_ops cam_clk_ops = { 1302 .prepare = cam_clk_prepare, 1303 .unprepare = cam_clk_unprepare, 1304}; 1305 1306static void fimc_md_unregister_clk_provider(struct fimc_md *fmd) 1307{ 1308 struct cam_clk_provider *cp = &fmd->clk_provider; 1309 unsigned int i; 1310 1311 if (cp->of_node) 1312 of_clk_del_provider(cp->of_node); 1313 1314 for (i = 0; i < cp->num_clocks; i++) 1315 clk_unregister(cp->clks[i]); 1316} 1317 1318static int fimc_md_register_clk_provider(struct fimc_md *fmd) 1319{ 1320 struct cam_clk_provider *cp = &fmd->clk_provider; 1321 struct device *dev = &fmd->pdev->dev; 1322 int i, ret; 1323 1324 for (i = 0; i < FIMC_MAX_CAMCLKS; i++) { 1325 struct cam_clk *camclk = &cp->camclk[i]; 1326 struct clk_init_data init; 1327 const char *p_name; 1328 1329 ret = of_property_read_string_index(dev->of_node, 1330 "clock-output-names", i, &init.name); 1331 if (ret < 0) 1332 break; 1333 1334 p_name = __clk_get_name(fmd->camclk[i].clock); 1335 1336 /* It's safe since clk_register() will duplicate the string. */ 1337 init.parent_names = &p_name; 1338 init.num_parents = 1; 1339 init.ops = &cam_clk_ops; 1340 init.flags = CLK_SET_RATE_PARENT; 1341 camclk->hw.init = &init; 1342 camclk->fmd = fmd; 1343 1344 cp->clks[i] = clk_register(NULL, &camclk->hw); 1345 if (IS_ERR(cp->clks[i])) { 1346 dev_err(dev, "failed to register clock: %s (%ld)\n", 1347 init.name, PTR_ERR(cp->clks[i])); 1348 ret = PTR_ERR(cp->clks[i]); 1349 goto err; 1350 } 1351 cp->num_clocks++; 1352 } 1353 1354 if (cp->num_clocks == 0) { 1355 dev_warn(dev, "clk provider not registered\n"); 1356 return 0; 1357 } 1358 1359 cp->clk_data.clks = cp->clks; 1360 cp->clk_data.clk_num = cp->num_clocks; 1361 cp->of_node = dev->of_node; 1362 ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get, 1363 &cp->clk_data); 1364 if (ret == 0) 1365 return 0; 1366err: 1367 fimc_md_unregister_clk_provider(fmd); 1368 return ret; 1369} 1370 1371static int subdev_notifier_bound(struct v4l2_async_notifier *notifier, 1372 struct v4l2_subdev *subdev, 1373 struct v4l2_async_subdev *asd) 1374{ 1375 struct fimc_md *fmd = notifier_to_fimc_md(notifier); 1376 struct fimc_sensor_info *si = NULL; 1377 int i; 1378 1379 /* Find platform data for this sensor subdev */ 1380 for (i = 0; i < ARRAY_SIZE(fmd->sensor); i++) 1381 if (fmd->sensor[i].asd == asd) 1382 si = &fmd->sensor[i]; 1383 1384 if (si == NULL) 1385 return -EINVAL; 1386 1387 v4l2_set_subdev_hostdata(subdev, &si->pdata); 1388 1389 if (si->pdata.fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK) 1390 subdev->grp_id = GRP_ID_FIMC_IS_SENSOR; 1391 else 1392 subdev->grp_id = GRP_ID_SENSOR; 1393 1394 si->subdev = subdev; 1395 1396 v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice: %s (%d)\n", 1397 subdev->name, fmd->num_sensors); 1398 1399 fmd->num_sensors++; 1400 1401 return 0; 1402} 1403 1404static int subdev_notifier_complete(struct v4l2_async_notifier *notifier) 1405{ 1406 struct fimc_md *fmd = notifier_to_fimc_md(notifier); 1407 int ret; 1408 1409 mutex_lock(&fmd->media_dev.graph_mutex); 1410 1411 ret = fimc_md_create_links(fmd); 1412 if (ret < 0) 1413 goto unlock; 1414 1415 ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev); 1416unlock: 1417 mutex_unlock(&fmd->media_dev.graph_mutex); 1418 if (ret < 0) 1419 return ret; 1420 1421 return media_device_register(&fmd->media_dev); 1422} 1423 1424static const struct v4l2_async_notifier_operations subdev_notifier_ops = { 1425 .bound = subdev_notifier_bound, 1426 .complete = subdev_notifier_complete, 1427}; 1428 1429static int fimc_md_probe(struct platform_device *pdev) 1430{ 1431 struct device *dev = &pdev->dev; 1432 struct v4l2_device *v4l2_dev; 1433 struct pinctrl *pinctrl; 1434 struct fimc_md *fmd; 1435 int ret; 1436 1437 fmd = devm_kzalloc(dev, sizeof(*fmd), GFP_KERNEL); 1438 if (!fmd) 1439 return -ENOMEM; 1440 1441 spin_lock_init(&fmd->slock); 1442 INIT_LIST_HEAD(&fmd->pipelines); 1443 fmd->pdev = pdev; 1444 1445 strscpy(fmd->media_dev.model, "Samsung S5P FIMC", 1446 sizeof(fmd->media_dev.model)); 1447 fmd->media_dev.ops = &fimc_md_ops; 1448 fmd->media_dev.dev = dev; 1449 1450 v4l2_dev = &fmd->v4l2_dev; 1451 v4l2_dev->mdev = &fmd->media_dev; 1452 v4l2_dev->notify = fimc_sensor_notify; 1453 strscpy(v4l2_dev->name, "s5p-fimc-md", sizeof(v4l2_dev->name)); 1454 1455 fmd->use_isp = fimc_md_is_isp_available(dev->of_node); 1456 fmd->user_subdev_api = true; 1457 1458 media_device_init(&fmd->media_dev); 1459 1460 ret = v4l2_device_register(dev, &fmd->v4l2_dev); 1461 if (ret < 0) { 1462 v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret); 1463 goto err_md; 1464 } 1465 1466 ret = fimc_md_get_clocks(fmd); 1467 if (ret) 1468 goto err_v4l2dev; 1469 1470 pinctrl = devm_pinctrl_get(dev); 1471 if (IS_ERR(pinctrl)) { 1472 ret = PTR_ERR(pinctrl); 1473 if (ret != -EPROBE_DEFER) 1474 dev_err(dev, "Failed to get pinctrl: %d\n", ret); 1475 goto err_clk; 1476 } 1477 1478 platform_set_drvdata(pdev, fmd); 1479 1480 v4l2_async_notifier_init(&fmd->subdev_notifier); 1481 1482 ret = fimc_md_register_platform_entities(fmd, dev->of_node); 1483 if (ret) 1484 goto err_clk; 1485 1486 ret = fimc_md_register_sensor_entities(fmd); 1487 if (ret) 1488 goto err_m_ent; 1489 1490 ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode); 1491 if (ret) 1492 goto err_cleanup; 1493 /* 1494 * FIMC platform devices need to be registered before the sclk_cam 1495 * clocks provider, as one of these devices needs to be activated 1496 * to enable the clock. 1497 */ 1498 ret = fimc_md_register_clk_provider(fmd); 1499 if (ret < 0) { 1500 v4l2_err(v4l2_dev, "clock provider registration failed\n"); 1501 goto err_attr; 1502 } 1503 1504 if (fmd->num_sensors > 0) { 1505 fmd->subdev_notifier.ops = &subdev_notifier_ops; 1506 fmd->num_sensors = 0; 1507 1508 ret = v4l2_async_notifier_register(&fmd->v4l2_dev, 1509 &fmd->subdev_notifier); 1510 if (ret) 1511 goto err_clk_p; 1512 } 1513 1514 return 0; 1515 1516err_clk_p: 1517 fimc_md_unregister_clk_provider(fmd); 1518err_attr: 1519 device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode); 1520err_cleanup: 1521 v4l2_async_notifier_cleanup(&fmd->subdev_notifier); 1522err_m_ent: 1523 fimc_md_unregister_entities(fmd); 1524err_clk: 1525 fimc_md_put_clocks(fmd); 1526err_v4l2dev: 1527 v4l2_device_unregister(&fmd->v4l2_dev); 1528err_md: 1529 media_device_cleanup(&fmd->media_dev); 1530 return ret; 1531} 1532 1533static int fimc_md_remove(struct platform_device *pdev) 1534{ 1535 struct fimc_md *fmd = platform_get_drvdata(pdev); 1536 1537 if (!fmd) 1538 return 0; 1539 1540 fimc_md_unregister_clk_provider(fmd); 1541 v4l2_async_notifier_unregister(&fmd->subdev_notifier); 1542 v4l2_async_notifier_cleanup(&fmd->subdev_notifier); 1543 1544 v4l2_device_unregister(&fmd->v4l2_dev); 1545 device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode); 1546 fimc_md_unregister_entities(fmd); 1547 fimc_md_pipelines_free(fmd); 1548 media_device_unregister(&fmd->media_dev); 1549 media_device_cleanup(&fmd->media_dev); 1550 fimc_md_put_clocks(fmd); 1551 1552 return 0; 1553} 1554 1555static const struct platform_device_id fimc_driver_ids[] __always_unused = { 1556 { .name = "s5p-fimc-md" }, 1557 { }, 1558}; 1559MODULE_DEVICE_TABLE(platform, fimc_driver_ids); 1560 1561static const struct of_device_id fimc_md_of_match[] = { 1562 { .compatible = "samsung,fimc" }, 1563 { }, 1564}; 1565MODULE_DEVICE_TABLE(of, fimc_md_of_match); 1566 1567static struct platform_driver fimc_md_driver = { 1568 .probe = fimc_md_probe, 1569 .remove = fimc_md_remove, 1570 .driver = { 1571 .of_match_table = of_match_ptr(fimc_md_of_match), 1572 .name = "s5p-fimc-md", 1573 } 1574}; 1575 1576static int __init fimc_md_init(void) 1577{ 1578 int ret; 1579 1580 request_module("s5p-csis"); 1581 ret = fimc_register_driver(); 1582 if (ret) 1583 return ret; 1584 1585 ret = platform_driver_register(&fimc_md_driver); 1586 if (ret) 1587 fimc_unregister_driver(); 1588 1589 return ret; 1590} 1591 1592static void __exit fimc_md_exit(void) 1593{ 1594 platform_driver_unregister(&fimc_md_driver); 1595 fimc_unregister_driver(); 1596} 1597 1598module_init(fimc_md_init); 1599module_exit(fimc_md_exit); 1600 1601MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>"); 1602MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver"); 1603MODULE_LICENSE("GPL"); 1604MODULE_VERSION("2.0.1"); 1605