1// SPDX-License-Identifier: GPL-2.0 2/* Author: Dan Scally <djrscally@gmail.com> */ 3 4#include <linux/acpi.h> 5#include <linux/cleanup.h> 6#include <linux/device.h> 7#include <linux/i2c.h> 8#include <linux/mei_cl_bus.h> 9#include <linux/platform_device.h> 10#include <linux/pm_runtime.h> 11#include <linux/property.h> 12#include <linux/string.h> 13#include <linux/workqueue.h> 14 15#include <media/ipu-bridge.h> 16#include <media/v4l2-fwnode.h> 17 18/* 19 * 92335fcf-3203-4472-af93-7b4453ac29da 20 * 21 * Used to build MEI CSI device name to lookup MEI CSI device by 22 * device_find_child_by_name(). 23 */ 24#define MEI_CSI_UUID \ 25 UUID_LE(0x92335FCF, 0x3203, 0x4472, \ 26 0xAF, 0x93, 0x7B, 0x44, 0x53, 0xAC, 0x29, 0xDA) 27 28/* 29 * IVSC device name 30 * 31 * Used to match IVSC device by ipu_bridge_match_ivsc_dev() 32 */ 33#define IVSC_DEV_NAME "intel_vsc" 34 35/* 36 * Extend this array with ACPI Hardware IDs of devices known to be working 37 * plus the number of link-frequencies expected by their drivers, along with 38 * the frequency values in hertz. This is somewhat opportunistic way of adding 39 * support for this for now in the hopes of a better source for the information 40 * (possibly some encoded value in the SSDB buffer that we're unaware of) 41 * becoming apparent in the future. 42 * 43 * Do not add an entry for a sensor that is not actually supported. 44 */ 45static const struct ipu_sensor_config ipu_supported_sensors[] = { 46 /* Omnivision OV5693 */ 47 IPU_SENSOR_CONFIG("INT33BE", 1, 419200000), 48 /* Omnivision OV8865 */ 49 IPU_SENSOR_CONFIG("INT347A", 1, 360000000), 50 /* Omnivision OV7251 */ 51 IPU_SENSOR_CONFIG("INT347E", 1, 319200000), 52 /* Omnivision OV2680 */ 53 IPU_SENSOR_CONFIG("OVTI2680", 1, 331200000), 54 /* Omnivision ov8856 */ 55 IPU_SENSOR_CONFIG("OVTI8856", 3, 180000000, 360000000, 720000000), 56 /* Omnivision ov2740 */ 57 IPU_SENSOR_CONFIG("INT3474", 1, 180000000), 58 /* Hynix hi556 */ 59 IPU_SENSOR_CONFIG("INT3537", 1, 437000000), 60 /* Omnivision ov13b10 */ 61 IPU_SENSOR_CONFIG("OVTIDB10", 1, 560000000), 62 /* GalaxyCore GC0310 */ 63 IPU_SENSOR_CONFIG("INT0310", 0), 64 /* Omnivision ov01a10 */ 65 IPU_SENSOR_CONFIG("OVTI01A0", 1, 400000000), 66}; 67 68static const struct ipu_property_names prop_names = { 69 .clock_frequency = "clock-frequency", 70 .rotation = "rotation", 71 .orientation = "orientation", 72 .bus_type = "bus-type", 73 .data_lanes = "data-lanes", 74 .remote_endpoint = "remote-endpoint", 75 .link_frequencies = "link-frequencies", 76}; 77 78static const char * const ipu_vcm_types[] = { 79 "ad5823", 80 "dw9714", 81 "ad5816", 82 "dw9719", 83 "dw9718", 84 "dw9806b", 85 "wv517s", 86 "lc898122xa", 87 "lc898212axb", 88}; 89 90/* 91 * Used to figure out IVSC acpi device by ipu_bridge_get_ivsc_acpi_dev() 92 * instead of device and driver match to probe IVSC device. 93 */ 94static const struct acpi_device_id ivsc_acpi_ids[] = { 95 { "INTC1059" }, 96 { "INTC1095" }, 97 { "INTC100A" }, 98 { "INTC10CF" }, 99}; 100 101static struct acpi_device *ipu_bridge_get_ivsc_acpi_dev(struct acpi_device *adev) 102{ 103 acpi_handle handle = acpi_device_handle(adev); 104 struct acpi_device *consumer, *ivsc_adev; 105 unsigned int i; 106 107 for (i = 0; i < ARRAY_SIZE(ivsc_acpi_ids); i++) { 108 const struct acpi_device_id *acpi_id = &ivsc_acpi_ids[i]; 109 110 for_each_acpi_dev_match(ivsc_adev, acpi_id->id, NULL, -1) 111 /* camera sensor depends on IVSC in DSDT if exist */ 112 for_each_acpi_consumer_dev(ivsc_adev, consumer) 113 if (consumer->handle == handle) { 114 acpi_dev_put(consumer); 115 return ivsc_adev; 116 } 117 } 118 119 return NULL; 120} 121 122static int ipu_bridge_match_ivsc_dev(struct device *dev, const void *adev) 123{ 124 if (ACPI_COMPANION(dev) != adev) 125 return 0; 126 127 if (!sysfs_streq(dev_name(dev), IVSC_DEV_NAME)) 128 return 0; 129 130 return 1; 131} 132 133static struct device *ipu_bridge_get_ivsc_csi_dev(struct acpi_device *adev) 134{ 135 struct device *dev, *csi_dev; 136 uuid_le uuid = MEI_CSI_UUID; 137 char name[64]; 138 139 /* IVSC device on platform bus */ 140 dev = bus_find_device(&platform_bus_type, NULL, adev, 141 ipu_bridge_match_ivsc_dev); 142 if (dev) { 143 snprintf(name, sizeof(name), "%s-%pUl", dev_name(dev), &uuid); 144 145 csi_dev = device_find_child_by_name(dev, name); 146 147 put_device(dev); 148 149 return csi_dev; 150 } 151 152 return NULL; 153} 154 155static int ipu_bridge_check_ivsc_dev(struct ipu_sensor *sensor, 156 struct acpi_device *sensor_adev) 157{ 158 struct acpi_device *adev; 159 struct device *csi_dev; 160 161 adev = ipu_bridge_get_ivsc_acpi_dev(sensor_adev); 162 if (adev) { 163 csi_dev = ipu_bridge_get_ivsc_csi_dev(adev); 164 if (!csi_dev) { 165 acpi_dev_put(adev); 166 dev_err(&adev->dev, "Failed to find MEI CSI dev\n"); 167 return -ENODEV; 168 } 169 170 sensor->csi_dev = csi_dev; 171 sensor->ivsc_adev = adev; 172 } 173 174 return 0; 175} 176 177static int ipu_bridge_read_acpi_buffer(struct acpi_device *adev, char *id, 178 void *data, u32 size) 179{ 180 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 181 union acpi_object *obj; 182 acpi_status status; 183 int ret = 0; 184 185 status = acpi_evaluate_object(adev->handle, id, NULL, &buffer); 186 if (ACPI_FAILURE(status)) 187 return -ENODEV; 188 189 obj = buffer.pointer; 190 if (!obj) { 191 dev_err(&adev->dev, "Couldn't locate ACPI buffer\n"); 192 return -ENODEV; 193 } 194 195 if (obj->type != ACPI_TYPE_BUFFER) { 196 dev_err(&adev->dev, "Not an ACPI buffer\n"); 197 ret = -ENODEV; 198 goto out_free_buff; 199 } 200 201 if (obj->buffer.length > size) { 202 dev_err(&adev->dev, "Given buffer is too small\n"); 203 ret = -EINVAL; 204 goto out_free_buff; 205 } 206 207 memcpy(data, obj->buffer.pointer, obj->buffer.length); 208 209out_free_buff: 210 kfree(buffer.pointer); 211 return ret; 212} 213 214static u32 ipu_bridge_parse_rotation(struct acpi_device *adev, 215 struct ipu_sensor_ssdb *ssdb) 216{ 217 switch (ssdb->degree) { 218 case IPU_SENSOR_ROTATION_NORMAL: 219 return 0; 220 case IPU_SENSOR_ROTATION_INVERTED: 221 return 180; 222 default: 223 dev_warn(&adev->dev, 224 "Unknown rotation %d. Assume 0 degree rotation\n", 225 ssdb->degree); 226 return 0; 227 } 228} 229 230static enum v4l2_fwnode_orientation ipu_bridge_parse_orientation(struct acpi_device *adev) 231{ 232 enum v4l2_fwnode_orientation orientation; 233 struct acpi_pld_info *pld; 234 acpi_status status; 235 236 status = acpi_get_physical_device_location(adev->handle, &pld); 237 if (ACPI_FAILURE(status)) { 238 dev_warn(&adev->dev, "_PLD call failed, using default orientation\n"); 239 return V4L2_FWNODE_ORIENTATION_EXTERNAL; 240 } 241 242 switch (pld->panel) { 243 case ACPI_PLD_PANEL_FRONT: 244 orientation = V4L2_FWNODE_ORIENTATION_FRONT; 245 break; 246 case ACPI_PLD_PANEL_BACK: 247 orientation = V4L2_FWNODE_ORIENTATION_BACK; 248 break; 249 case ACPI_PLD_PANEL_TOP: 250 case ACPI_PLD_PANEL_LEFT: 251 case ACPI_PLD_PANEL_RIGHT: 252 case ACPI_PLD_PANEL_UNKNOWN: 253 orientation = V4L2_FWNODE_ORIENTATION_EXTERNAL; 254 break; 255 default: 256 dev_warn(&adev->dev, "Unknown _PLD panel val %d\n", pld->panel); 257 orientation = V4L2_FWNODE_ORIENTATION_EXTERNAL; 258 break; 259 } 260 261 ACPI_FREE(pld); 262 return orientation; 263} 264 265int ipu_bridge_parse_ssdb(struct acpi_device *adev, struct ipu_sensor *sensor) 266{ 267 struct ipu_sensor_ssdb ssdb = {}; 268 int ret; 269 270 ret = ipu_bridge_read_acpi_buffer(adev, "SSDB", &ssdb, sizeof(ssdb)); 271 if (ret) 272 return ret; 273 274 if (ssdb.vcmtype > ARRAY_SIZE(ipu_vcm_types)) { 275 dev_warn(&adev->dev, "Unknown VCM type %d\n", ssdb.vcmtype); 276 ssdb.vcmtype = 0; 277 } 278 279 if (ssdb.lanes > IPU_MAX_LANES) { 280 dev_err(&adev->dev, "Number of lanes in SSDB is invalid\n"); 281 return -EINVAL; 282 } 283 284 sensor->link = ssdb.link; 285 sensor->lanes = ssdb.lanes; 286 sensor->mclkspeed = ssdb.mclkspeed; 287 sensor->rotation = ipu_bridge_parse_rotation(adev, &ssdb); 288 sensor->orientation = ipu_bridge_parse_orientation(adev); 289 290 if (ssdb.vcmtype) 291 sensor->vcm_type = ipu_vcm_types[ssdb.vcmtype - 1]; 292 293 return 0; 294} 295EXPORT_SYMBOL_NS_GPL(ipu_bridge_parse_ssdb, INTEL_IPU_BRIDGE); 296 297static void ipu_bridge_create_fwnode_properties( 298 struct ipu_sensor *sensor, 299 struct ipu_bridge *bridge, 300 const struct ipu_sensor_config *cfg) 301{ 302 struct ipu_property_names *names = &sensor->prop_names; 303 struct software_node *nodes = sensor->swnodes; 304 305 sensor->prop_names = prop_names; 306 307 if (sensor->csi_dev) { 308 sensor->local_ref[0] = 309 SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_IVSC_SENSOR_ENDPOINT]); 310 sensor->remote_ref[0] = 311 SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_IVSC_IPU_ENDPOINT]); 312 sensor->ivsc_sensor_ref[0] = 313 SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_SENSOR_ENDPOINT]); 314 sensor->ivsc_ipu_ref[0] = 315 SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_IPU_ENDPOINT]); 316 317 sensor->ivsc_sensor_ep_properties[0] = 318 PROPERTY_ENTRY_U32(names->bus_type, 319 V4L2_FWNODE_BUS_TYPE_CSI2_DPHY); 320 sensor->ivsc_sensor_ep_properties[1] = 321 PROPERTY_ENTRY_U32_ARRAY_LEN(names->data_lanes, 322 bridge->data_lanes, 323 sensor->lanes); 324 sensor->ivsc_sensor_ep_properties[2] = 325 PROPERTY_ENTRY_REF_ARRAY(names->remote_endpoint, 326 sensor->ivsc_sensor_ref); 327 328 sensor->ivsc_ipu_ep_properties[0] = 329 PROPERTY_ENTRY_U32(names->bus_type, 330 V4L2_FWNODE_BUS_TYPE_CSI2_DPHY); 331 sensor->ivsc_ipu_ep_properties[1] = 332 PROPERTY_ENTRY_U32_ARRAY_LEN(names->data_lanes, 333 bridge->data_lanes, 334 sensor->lanes); 335 sensor->ivsc_ipu_ep_properties[2] = 336 PROPERTY_ENTRY_REF_ARRAY(names->remote_endpoint, 337 sensor->ivsc_ipu_ref); 338 } else { 339 sensor->local_ref[0] = 340 SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_IPU_ENDPOINT]); 341 sensor->remote_ref[0] = 342 SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_SENSOR_ENDPOINT]); 343 } 344 345 sensor->dev_properties[0] = PROPERTY_ENTRY_U32( 346 sensor->prop_names.clock_frequency, 347 sensor->mclkspeed); 348 sensor->dev_properties[1] = PROPERTY_ENTRY_U32( 349 sensor->prop_names.rotation, 350 sensor->rotation); 351 sensor->dev_properties[2] = PROPERTY_ENTRY_U32( 352 sensor->prop_names.orientation, 353 sensor->orientation); 354 if (sensor->vcm_type) { 355 sensor->vcm_ref[0] = 356 SOFTWARE_NODE_REFERENCE(&sensor->swnodes[SWNODE_VCM]); 357 sensor->dev_properties[3] = 358 PROPERTY_ENTRY_REF_ARRAY("lens-focus", sensor->vcm_ref); 359 } 360 361 sensor->ep_properties[0] = PROPERTY_ENTRY_U32( 362 sensor->prop_names.bus_type, 363 V4L2_FWNODE_BUS_TYPE_CSI2_DPHY); 364 sensor->ep_properties[1] = PROPERTY_ENTRY_U32_ARRAY_LEN( 365 sensor->prop_names.data_lanes, 366 bridge->data_lanes, sensor->lanes); 367 sensor->ep_properties[2] = PROPERTY_ENTRY_REF_ARRAY( 368 sensor->prop_names.remote_endpoint, 369 sensor->local_ref); 370 371 if (cfg->nr_link_freqs > 0) 372 sensor->ep_properties[3] = PROPERTY_ENTRY_U64_ARRAY_LEN( 373 sensor->prop_names.link_frequencies, 374 cfg->link_freqs, 375 cfg->nr_link_freqs); 376 377 sensor->ipu_properties[0] = PROPERTY_ENTRY_U32_ARRAY_LEN( 378 sensor->prop_names.data_lanes, 379 bridge->data_lanes, sensor->lanes); 380 sensor->ipu_properties[1] = PROPERTY_ENTRY_REF_ARRAY( 381 sensor->prop_names.remote_endpoint, 382 sensor->remote_ref); 383} 384 385static void ipu_bridge_init_swnode_names(struct ipu_sensor *sensor) 386{ 387 snprintf(sensor->node_names.remote_port, 388 sizeof(sensor->node_names.remote_port), 389 SWNODE_GRAPH_PORT_NAME_FMT, sensor->link); 390 snprintf(sensor->node_names.port, 391 sizeof(sensor->node_names.port), 392 SWNODE_GRAPH_PORT_NAME_FMT, 0); /* Always port 0 */ 393 snprintf(sensor->node_names.endpoint, 394 sizeof(sensor->node_names.endpoint), 395 SWNODE_GRAPH_ENDPOINT_NAME_FMT, 0); /* And endpoint 0 */ 396 if (sensor->vcm_type) { 397 /* append link to distinguish nodes with same model VCM */ 398 snprintf(sensor->node_names.vcm, sizeof(sensor->node_names.vcm), 399 "%s-%u", sensor->vcm_type, sensor->link); 400 } 401 402 if (sensor->csi_dev) { 403 snprintf(sensor->node_names.ivsc_sensor_port, 404 sizeof(sensor->node_names.ivsc_sensor_port), 405 SWNODE_GRAPH_PORT_NAME_FMT, 0); 406 snprintf(sensor->node_names.ivsc_ipu_port, 407 sizeof(sensor->node_names.ivsc_ipu_port), 408 SWNODE_GRAPH_PORT_NAME_FMT, 1); 409 } 410} 411 412static void ipu_bridge_init_swnode_group(struct ipu_sensor *sensor) 413{ 414 struct software_node *nodes = sensor->swnodes; 415 416 sensor->group[SWNODE_SENSOR_HID] = &nodes[SWNODE_SENSOR_HID]; 417 sensor->group[SWNODE_SENSOR_PORT] = &nodes[SWNODE_SENSOR_PORT]; 418 sensor->group[SWNODE_SENSOR_ENDPOINT] = &nodes[SWNODE_SENSOR_ENDPOINT]; 419 sensor->group[SWNODE_IPU_PORT] = &nodes[SWNODE_IPU_PORT]; 420 sensor->group[SWNODE_IPU_ENDPOINT] = &nodes[SWNODE_IPU_ENDPOINT]; 421 if (sensor->vcm_type) 422 sensor->group[SWNODE_VCM] = &nodes[SWNODE_VCM]; 423 424 if (sensor->csi_dev) { 425 sensor->group[SWNODE_IVSC_HID] = 426 &nodes[SWNODE_IVSC_HID]; 427 sensor->group[SWNODE_IVSC_SENSOR_PORT] = 428 &nodes[SWNODE_IVSC_SENSOR_PORT]; 429 sensor->group[SWNODE_IVSC_SENSOR_ENDPOINT] = 430 &nodes[SWNODE_IVSC_SENSOR_ENDPOINT]; 431 sensor->group[SWNODE_IVSC_IPU_PORT] = 432 &nodes[SWNODE_IVSC_IPU_PORT]; 433 sensor->group[SWNODE_IVSC_IPU_ENDPOINT] = 434 &nodes[SWNODE_IVSC_IPU_ENDPOINT]; 435 436 if (sensor->vcm_type) 437 sensor->group[SWNODE_VCM] = &nodes[SWNODE_VCM]; 438 } else { 439 if (sensor->vcm_type) 440 sensor->group[SWNODE_IVSC_HID] = &nodes[SWNODE_VCM]; 441 } 442} 443 444static void ipu_bridge_create_connection_swnodes(struct ipu_bridge *bridge, 445 struct ipu_sensor *sensor) 446{ 447 struct ipu_node_names *names = &sensor->node_names; 448 struct software_node *nodes = sensor->swnodes; 449 450 ipu_bridge_init_swnode_names(sensor); 451 452 nodes[SWNODE_SENSOR_HID] = NODE_SENSOR(sensor->name, 453 sensor->dev_properties); 454 nodes[SWNODE_SENSOR_PORT] = NODE_PORT(sensor->node_names.port, 455 &nodes[SWNODE_SENSOR_HID]); 456 nodes[SWNODE_SENSOR_ENDPOINT] = NODE_ENDPOINT( 457 sensor->node_names.endpoint, 458 &nodes[SWNODE_SENSOR_PORT], 459 sensor->ep_properties); 460 nodes[SWNODE_IPU_PORT] = NODE_PORT(sensor->node_names.remote_port, 461 &bridge->ipu_hid_node); 462 nodes[SWNODE_IPU_ENDPOINT] = NODE_ENDPOINT( 463 sensor->node_names.endpoint, 464 &nodes[SWNODE_IPU_PORT], 465 sensor->ipu_properties); 466 467 if (sensor->csi_dev) { 468 snprintf(sensor->ivsc_name, sizeof(sensor->ivsc_name), "%s-%u", 469 acpi_device_hid(sensor->ivsc_adev), sensor->link); 470 471 nodes[SWNODE_IVSC_HID] = NODE_SENSOR(sensor->ivsc_name, 472 sensor->ivsc_properties); 473 nodes[SWNODE_IVSC_SENSOR_PORT] = 474 NODE_PORT(names->ivsc_sensor_port, 475 &nodes[SWNODE_IVSC_HID]); 476 nodes[SWNODE_IVSC_SENSOR_ENDPOINT] = 477 NODE_ENDPOINT(names->endpoint, 478 &nodes[SWNODE_IVSC_SENSOR_PORT], 479 sensor->ivsc_sensor_ep_properties); 480 nodes[SWNODE_IVSC_IPU_PORT] = 481 NODE_PORT(names->ivsc_ipu_port, 482 &nodes[SWNODE_IVSC_HID]); 483 nodes[SWNODE_IVSC_IPU_ENDPOINT] = 484 NODE_ENDPOINT(names->endpoint, 485 &nodes[SWNODE_IVSC_IPU_PORT], 486 sensor->ivsc_ipu_ep_properties); 487 } 488 489 nodes[SWNODE_VCM] = NODE_VCM(sensor->node_names.vcm); 490 491 ipu_bridge_init_swnode_group(sensor); 492} 493 494/* 495 * The actual instantiation must be done from a workqueue to avoid 496 * a deadlock on taking list_lock from v4l2-async twice. 497 */ 498struct ipu_bridge_instantiate_vcm_work_data { 499 struct work_struct work; 500 struct device *sensor; 501 char name[16]; 502 struct i2c_board_info board_info; 503}; 504 505static void ipu_bridge_instantiate_vcm_work(struct work_struct *work) 506{ 507 struct ipu_bridge_instantiate_vcm_work_data *data = 508 container_of(work, struct ipu_bridge_instantiate_vcm_work_data, 509 work); 510 struct acpi_device *adev = ACPI_COMPANION(data->sensor); 511 struct i2c_client *vcm_client; 512 bool put_fwnode = true; 513 int ret; 514 515 /* 516 * The client may get probed before the device_link gets added below 517 * make sure the sensor is powered-up during probe. 518 */ 519 ret = pm_runtime_get_sync(data->sensor); 520 if (ret < 0) { 521 dev_err(data->sensor, "Error %d runtime-resuming sensor, cannot instantiate VCM\n", 522 ret); 523 goto out_pm_put; 524 } 525 526 /* 527 * Note the client is created only once and then kept around 528 * even after a rmmod, just like the software-nodes. 529 */ 530 vcm_client = i2c_acpi_new_device_by_fwnode(acpi_fwnode_handle(adev), 531 1, &data->board_info); 532 if (IS_ERR(vcm_client)) { 533 dev_err(data->sensor, "Error instantiating VCM client: %ld\n", 534 PTR_ERR(vcm_client)); 535 goto out_pm_put; 536 } 537 538 device_link_add(&vcm_client->dev, data->sensor, DL_FLAG_PM_RUNTIME); 539 540 dev_info(data->sensor, "Instantiated %s VCM\n", data->board_info.type); 541 put_fwnode = false; /* Ownership has passed to the i2c-client */ 542 543out_pm_put: 544 pm_runtime_put(data->sensor); 545 put_device(data->sensor); 546 if (put_fwnode) 547 fwnode_handle_put(data->board_info.fwnode); 548 kfree(data); 549} 550 551int ipu_bridge_instantiate_vcm(struct device *sensor) 552{ 553 struct ipu_bridge_instantiate_vcm_work_data *data; 554 struct fwnode_handle *vcm_fwnode; 555 struct i2c_client *vcm_client; 556 struct acpi_device *adev; 557 char *sep; 558 559 adev = ACPI_COMPANION(sensor); 560 if (!adev) 561 return 0; 562 563 vcm_fwnode = fwnode_find_reference(dev_fwnode(sensor), "lens-focus", 0); 564 if (IS_ERR(vcm_fwnode)) 565 return 0; 566 567 /* When reloading modules the client will already exist */ 568 vcm_client = i2c_find_device_by_fwnode(vcm_fwnode); 569 if (vcm_client) { 570 fwnode_handle_put(vcm_fwnode); 571 put_device(&vcm_client->dev); 572 return 0; 573 } 574 575 data = kzalloc(sizeof(*data), GFP_KERNEL); 576 if (!data) { 577 fwnode_handle_put(vcm_fwnode); 578 return -ENOMEM; 579 } 580 581 INIT_WORK(&data->work, ipu_bridge_instantiate_vcm_work); 582 data->sensor = get_device(sensor); 583 snprintf(data->name, sizeof(data->name), "%s-VCM", 584 acpi_dev_name(adev)); 585 data->board_info.dev_name = data->name; 586 data->board_info.fwnode = vcm_fwnode; 587 snprintf(data->board_info.type, sizeof(data->board_info.type), 588 "%pfwP", vcm_fwnode); 589 /* Strip "-<link>" postfix */ 590 sep = strchrnul(data->board_info.type, '-'); 591 *sep = 0; 592 593 queue_work(system_long_wq, &data->work); 594 595 return 0; 596} 597EXPORT_SYMBOL_NS_GPL(ipu_bridge_instantiate_vcm, INTEL_IPU_BRIDGE); 598 599static int ipu_bridge_instantiate_ivsc(struct ipu_sensor *sensor) 600{ 601 struct fwnode_handle *fwnode; 602 603 if (!sensor->csi_dev) 604 return 0; 605 606 fwnode = software_node_fwnode(&sensor->swnodes[SWNODE_IVSC_HID]); 607 if (!fwnode) 608 return -ENODEV; 609 610 set_secondary_fwnode(sensor->csi_dev, fwnode); 611 612 return 0; 613} 614 615static void ipu_bridge_unregister_sensors(struct ipu_bridge *bridge) 616{ 617 struct ipu_sensor *sensor; 618 unsigned int i; 619 620 for (i = 0; i < bridge->n_sensors; i++) { 621 sensor = &bridge->sensors[i]; 622 software_node_unregister_node_group(sensor->group); 623 acpi_dev_put(sensor->adev); 624 put_device(sensor->csi_dev); 625 acpi_dev_put(sensor->ivsc_adev); 626 } 627} 628 629static int ipu_bridge_connect_sensor(const struct ipu_sensor_config *cfg, 630 struct ipu_bridge *bridge) 631{ 632 struct fwnode_handle *fwnode, *primary; 633 struct ipu_sensor *sensor; 634 struct acpi_device *adev; 635 int ret; 636 637 for_each_acpi_dev_match(adev, cfg->hid, NULL, -1) { 638 if (!adev->status.enabled) 639 continue; 640 641 if (bridge->n_sensors >= IPU_MAX_PORTS) { 642 acpi_dev_put(adev); 643 dev_err(bridge->dev, "Exceeded available IPU ports\n"); 644 return -EINVAL; 645 } 646 647 sensor = &bridge->sensors[bridge->n_sensors]; 648 649 ret = bridge->parse_sensor_fwnode(adev, sensor); 650 if (ret) 651 goto err_put_adev; 652 653 snprintf(sensor->name, sizeof(sensor->name), "%s-%u", 654 cfg->hid, sensor->link); 655 656 ret = ipu_bridge_check_ivsc_dev(sensor, adev); 657 if (ret) 658 goto err_put_adev; 659 660 ipu_bridge_create_fwnode_properties(sensor, bridge, cfg); 661 ipu_bridge_create_connection_swnodes(bridge, sensor); 662 663 ret = software_node_register_node_group(sensor->group); 664 if (ret) 665 goto err_put_ivsc; 666 667 fwnode = software_node_fwnode(&sensor->swnodes[ 668 SWNODE_SENSOR_HID]); 669 if (!fwnode) { 670 ret = -ENODEV; 671 goto err_free_swnodes; 672 } 673 674 sensor->adev = acpi_dev_get(adev); 675 676 primary = acpi_fwnode_handle(adev); 677 primary->secondary = fwnode; 678 679 ret = ipu_bridge_instantiate_ivsc(sensor); 680 if (ret) 681 goto err_free_swnodes; 682 683 dev_info(bridge->dev, "Found supported sensor %s\n", 684 acpi_dev_name(adev)); 685 686 bridge->n_sensors++; 687 } 688 689 return 0; 690 691err_free_swnodes: 692 software_node_unregister_node_group(sensor->group); 693err_put_ivsc: 694 put_device(sensor->csi_dev); 695 acpi_dev_put(sensor->ivsc_adev); 696err_put_adev: 697 acpi_dev_put(adev); 698 return ret; 699} 700 701static int ipu_bridge_connect_sensors(struct ipu_bridge *bridge) 702{ 703 unsigned int i; 704 int ret; 705 706 for (i = 0; i < ARRAY_SIZE(ipu_supported_sensors); i++) { 707 const struct ipu_sensor_config *cfg = 708 &ipu_supported_sensors[i]; 709 710 ret = ipu_bridge_connect_sensor(cfg, bridge); 711 if (ret) 712 goto err_unregister_sensors; 713 } 714 715 return 0; 716 717err_unregister_sensors: 718 ipu_bridge_unregister_sensors(bridge); 719 return ret; 720} 721 722static int ipu_bridge_ivsc_is_ready(void) 723{ 724 struct acpi_device *sensor_adev, *adev; 725 struct device *csi_dev; 726 bool ready = true; 727 unsigned int i; 728 729 for (i = 0; i < ARRAY_SIZE(ipu_supported_sensors); i++) { 730 const struct ipu_sensor_config *cfg = 731 &ipu_supported_sensors[i]; 732 733 for_each_acpi_dev_match(sensor_adev, cfg->hid, NULL, -1) { 734 if (!sensor_adev->status.enabled) 735 continue; 736 737 adev = ipu_bridge_get_ivsc_acpi_dev(sensor_adev); 738 if (!adev) 739 continue; 740 741 csi_dev = ipu_bridge_get_ivsc_csi_dev(adev); 742 if (!csi_dev) 743 ready = false; 744 745 put_device(csi_dev); 746 acpi_dev_put(adev); 747 } 748 } 749 750 return ready; 751} 752 753static int ipu_bridge_check_fwnode_graph(struct fwnode_handle *fwnode) 754{ 755 struct fwnode_handle *endpoint; 756 757 if (IS_ERR_OR_NULL(fwnode)) 758 return -EINVAL; 759 760 endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL); 761 if (endpoint) { 762 fwnode_handle_put(endpoint); 763 return 0; 764 } 765 766 return ipu_bridge_check_fwnode_graph(fwnode->secondary); 767} 768 769static DEFINE_MUTEX(ipu_bridge_mutex); 770 771int ipu_bridge_init(struct device *dev, 772 ipu_parse_sensor_fwnode_t parse_sensor_fwnode) 773{ 774 struct fwnode_handle *fwnode; 775 struct ipu_bridge *bridge; 776 unsigned int i; 777 int ret; 778 779 guard(mutex)(&ipu_bridge_mutex); 780 781 if (!ipu_bridge_check_fwnode_graph(dev_fwnode(dev))) 782 return 0; 783 784 if (!ipu_bridge_ivsc_is_ready()) 785 return -EPROBE_DEFER; 786 787 bridge = kzalloc(sizeof(*bridge), GFP_KERNEL); 788 if (!bridge) 789 return -ENOMEM; 790 791 strscpy(bridge->ipu_node_name, IPU_HID, 792 sizeof(bridge->ipu_node_name)); 793 bridge->ipu_hid_node.name = bridge->ipu_node_name; 794 bridge->dev = dev; 795 bridge->parse_sensor_fwnode = parse_sensor_fwnode; 796 797 ret = software_node_register(&bridge->ipu_hid_node); 798 if (ret < 0) { 799 dev_err(dev, "Failed to register the IPU HID node\n"); 800 goto err_free_bridge; 801 } 802 803 /* 804 * Map the lane arrangement, which is fixed for the IPU3 (meaning we 805 * only need one, rather than one per sensor). We include it as a 806 * member of the struct ipu_bridge rather than a global variable so 807 * that it survives if the module is unloaded along with the rest of 808 * the struct. 809 */ 810 for (i = 0; i < IPU_MAX_LANES; i++) 811 bridge->data_lanes[i] = i + 1; 812 813 ret = ipu_bridge_connect_sensors(bridge); 814 if (ret || bridge->n_sensors == 0) 815 goto err_unregister_ipu; 816 817 dev_info(dev, "Connected %d cameras\n", bridge->n_sensors); 818 819 fwnode = software_node_fwnode(&bridge->ipu_hid_node); 820 if (!fwnode) { 821 dev_err(dev, "Error getting fwnode from ipu software_node\n"); 822 ret = -ENODEV; 823 goto err_unregister_sensors; 824 } 825 826 set_secondary_fwnode(dev, fwnode); 827 828 return 0; 829 830err_unregister_sensors: 831 ipu_bridge_unregister_sensors(bridge); 832err_unregister_ipu: 833 software_node_unregister(&bridge->ipu_hid_node); 834err_free_bridge: 835 kfree(bridge); 836 837 return ret; 838} 839EXPORT_SYMBOL_NS_GPL(ipu_bridge_init, INTEL_IPU_BRIDGE); 840 841MODULE_LICENSE("GPL"); 842MODULE_DESCRIPTION("Intel IPU Sensors Bridge driver"); 843