1 // SPDX-License-Identifier: GPL-2.0
2 /* Author: Dan Scally <djrscally@gmail.com> */
4 #include <linux/acpi.h>
5 #include <linux/device.h>
7 #include <linux/mei_cl_bus.h>
8 #include <linux/platform_device.h>
9 #include <linux/pm_runtime.h>
10 #include <linux/property.h>
11 #include <linux/string.h>
12 #include <linux/workqueue.h>
14 #include <media/ipu-bridge.h>
15 #include <media/v4l2-fwnode.h>
18 * 92335fcf-3203-4472-af93-7b4453ac29da
20 * Used to build MEI CSI device name to lookup MEI CSI device by
21 * device_find_child_by_name().
23 #define MEI_CSI_UUID \
24 UUID_LE(0x92335FCF, 0x3203, 0x4472, \
25 0xAF, 0x93, 0x7B, 0x44, 0x53, 0xAC, 0x29, 0xDA)
30 * Used to match IVSC device by ipu_bridge_match_ivsc_dev()
32 #define IVSC_DEV_NAME "intel_vsc"
35 * Extend this array with ACPI Hardware IDs of devices known to be working
36 * plus the number of link-frequencies expected by their drivers, along with
37 * the frequency values in hertz. This is somewhat opportunistic way of adding
38 * support for this for now in the hopes of a better source for the information
39 * (possibly some encoded value in the SSDB buffer that we're unaware of)
40 * becoming apparent in the future.
42 * Do not add an entry for a sensor that is not actually supported.
44 static const struct ipu_sensor_config ipu_supported_sensors[] = {
45 /* Omnivision OV5693 */
46 IPU_SENSOR_CONFIG("INT33BE", 1, 419200000),
47 /* Omnivision OV8865 */
48 IPU_SENSOR_CONFIG("INT347A", 1, 360000000),
49 /* Omnivision OV7251 */
50 IPU_SENSOR_CONFIG("INT347E", 1, 319200000),
51 /* Omnivision OV2680 */
52 IPU_SENSOR_CONFIG("OVTI2680", 1, 331200000),
53 /* Omnivision ov8856 */
54 IPU_SENSOR_CONFIG("OVTI8856", 3, 180000000, 360000000, 720000000),
55 /* Omnivision ov2740 */
56 IPU_SENSOR_CONFIG("INT3474", 1, 360000000),
58 IPU_SENSOR_CONFIG("INT3537", 1, 437000000),
59 /* Omnivision ov13b10 */
60 IPU_SENSOR_CONFIG("OVTIDB10", 1, 560000000),
61 /* GalaxyCore GC0310 */
62 IPU_SENSOR_CONFIG("INT0310", 0),
65 static const struct ipu_property_names prop_names = {
66 .clock_frequency = "clock-frequency",
67 .rotation = "rotation",
68 .orientation = "orientation",
69 .bus_type = "bus-type",
70 .data_lanes = "data-lanes",
71 .remote_endpoint = "remote-endpoint",
72 .link_frequencies = "link-frequencies",
75 static const char * const ipu_vcm_types[] = {
88 * Used to figure out IVSC acpi device by ipu_bridge_get_ivsc_acpi_dev()
89 * instead of device and driver match to probe IVSC device.
91 static const struct acpi_device_id ivsc_acpi_ids[] = {
98 static struct acpi_device *ipu_bridge_get_ivsc_acpi_dev(struct acpi_device *adev)
100 acpi_handle handle = acpi_device_handle(adev);
101 struct acpi_device *consumer, *ivsc_adev;
104 for (i = 0; i < ARRAY_SIZE(ivsc_acpi_ids); i++) {
105 const struct acpi_device_id *acpi_id = &ivsc_acpi_ids[i];
107 for_each_acpi_dev_match(ivsc_adev, acpi_id->id, NULL, -1)
108 /* camera sensor depends on IVSC in DSDT if exist */
109 for_each_acpi_consumer_dev(ivsc_adev, consumer)
110 if (consumer->handle == handle) {
111 acpi_dev_put(consumer);
119 static int ipu_bridge_match_ivsc_dev(struct device *dev, const void *adev)
121 if (ACPI_COMPANION(dev) != adev)
124 if (!sysfs_streq(dev_name(dev), IVSC_DEV_NAME))
130 static struct device *ipu_bridge_get_ivsc_csi_dev(struct acpi_device *adev)
132 struct device *dev, *csi_dev;
133 uuid_le uuid = MEI_CSI_UUID;
136 /* IVSC device on platform bus */
137 dev = bus_find_device(&platform_bus_type, NULL, adev,
138 ipu_bridge_match_ivsc_dev);
140 snprintf(name, sizeof(name), "%s-%pUl", dev_name(dev), &uuid);
142 csi_dev = device_find_child_by_name(dev, name);
152 static int ipu_bridge_check_ivsc_dev(struct ipu_sensor *sensor,
153 struct acpi_device *sensor_adev)
155 struct acpi_device *adev;
156 struct device *csi_dev;
158 adev = ipu_bridge_get_ivsc_acpi_dev(sensor_adev);
160 csi_dev = ipu_bridge_get_ivsc_csi_dev(adev);
163 dev_err(&adev->dev, "Failed to find MEI CSI dev\n");
167 sensor->csi_dev = csi_dev;
168 sensor->ivsc_adev = adev;
174 static int ipu_bridge_read_acpi_buffer(struct acpi_device *adev, char *id,
175 void *data, u32 size)
177 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
178 union acpi_object *obj;
182 status = acpi_evaluate_object(adev->handle, id, NULL, &buffer);
183 if (ACPI_FAILURE(status))
186 obj = buffer.pointer;
188 dev_err(&adev->dev, "Couldn't locate ACPI buffer\n");
192 if (obj->type != ACPI_TYPE_BUFFER) {
193 dev_err(&adev->dev, "Not an ACPI buffer\n");
198 if (obj->buffer.length > size) {
199 dev_err(&adev->dev, "Given buffer is too small\n");
204 memcpy(data, obj->buffer.pointer, obj->buffer.length);
207 kfree(buffer.pointer);
211 static u32 ipu_bridge_parse_rotation(struct acpi_device *adev,
212 struct ipu_sensor_ssdb *ssdb)
214 switch (ssdb->degree) {
215 case IPU_SENSOR_ROTATION_NORMAL:
217 case IPU_SENSOR_ROTATION_INVERTED:
221 "Unknown rotation %d. Assume 0 degree rotation\n",
227 static enum v4l2_fwnode_orientation ipu_bridge_parse_orientation(struct acpi_device *adev)
229 enum v4l2_fwnode_orientation orientation;
230 struct acpi_pld_info *pld;
233 status = acpi_get_physical_device_location(adev->handle, &pld);
234 if (ACPI_FAILURE(status)) {
235 dev_warn(&adev->dev, "_PLD call failed, using default orientation\n");
236 return V4L2_FWNODE_ORIENTATION_EXTERNAL;
239 switch (pld->panel) {
240 case ACPI_PLD_PANEL_FRONT:
241 orientation = V4L2_FWNODE_ORIENTATION_FRONT;
243 case ACPI_PLD_PANEL_BACK:
244 orientation = V4L2_FWNODE_ORIENTATION_BACK;
246 case ACPI_PLD_PANEL_TOP:
247 case ACPI_PLD_PANEL_LEFT:
248 case ACPI_PLD_PANEL_RIGHT:
249 case ACPI_PLD_PANEL_UNKNOWN:
250 orientation = V4L2_FWNODE_ORIENTATION_EXTERNAL;
253 dev_warn(&adev->dev, "Unknown _PLD panel val %d\n", pld->panel);
254 orientation = V4L2_FWNODE_ORIENTATION_EXTERNAL;
262 int ipu_bridge_parse_ssdb(struct acpi_device *adev, struct ipu_sensor *sensor)
264 struct ipu_sensor_ssdb ssdb = {};
267 ret = ipu_bridge_read_acpi_buffer(adev, "SSDB", &ssdb, sizeof(ssdb));
271 if (ssdb.vcmtype > ARRAY_SIZE(ipu_vcm_types)) {
272 dev_warn(&adev->dev, "Unknown VCM type %d\n", ssdb.vcmtype);
276 if (ssdb.lanes > IPU_MAX_LANES) {
277 dev_err(&adev->dev, "Number of lanes in SSDB is invalid\n");
281 sensor->link = ssdb.link;
282 sensor->lanes = ssdb.lanes;
283 sensor->mclkspeed = ssdb.mclkspeed;
284 sensor->rotation = ipu_bridge_parse_rotation(adev, &ssdb);
285 sensor->orientation = ipu_bridge_parse_orientation(adev);
288 sensor->vcm_type = ipu_vcm_types[ssdb.vcmtype - 1];
292 EXPORT_SYMBOL_NS_GPL(ipu_bridge_parse_ssdb, INTEL_IPU_BRIDGE);
294 static void ipu_bridge_create_fwnode_properties(
295 struct ipu_sensor *sensor,
296 struct ipu_bridge *bridge,
297 const struct ipu_sensor_config *cfg)
299 struct ipu_property_names *names = &sensor->prop_names;
300 struct software_node *nodes = sensor->swnodes;
302 sensor->prop_names = prop_names;
304 if (sensor->csi_dev) {
305 sensor->local_ref[0] =
306 SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_IVSC_SENSOR_ENDPOINT]);
307 sensor->remote_ref[0] =
308 SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_IVSC_IPU_ENDPOINT]);
309 sensor->ivsc_sensor_ref[0] =
310 SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_SENSOR_ENDPOINT]);
311 sensor->ivsc_ipu_ref[0] =
312 SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_IPU_ENDPOINT]);
314 sensor->ivsc_sensor_ep_properties[0] =
315 PROPERTY_ENTRY_U32(names->bus_type,
316 V4L2_FWNODE_BUS_TYPE_CSI2_DPHY);
317 sensor->ivsc_sensor_ep_properties[1] =
318 PROPERTY_ENTRY_U32_ARRAY_LEN(names->data_lanes,
321 sensor->ivsc_sensor_ep_properties[2] =
322 PROPERTY_ENTRY_REF_ARRAY(names->remote_endpoint,
323 sensor->ivsc_sensor_ref);
325 sensor->ivsc_ipu_ep_properties[0] =
326 PROPERTY_ENTRY_U32(names->bus_type,
327 V4L2_FWNODE_BUS_TYPE_CSI2_DPHY);
328 sensor->ivsc_ipu_ep_properties[1] =
329 PROPERTY_ENTRY_U32_ARRAY_LEN(names->data_lanes,
332 sensor->ivsc_ipu_ep_properties[2] =
333 PROPERTY_ENTRY_REF_ARRAY(names->remote_endpoint,
334 sensor->ivsc_ipu_ref);
336 sensor->local_ref[0] =
337 SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_IPU_ENDPOINT]);
338 sensor->remote_ref[0] =
339 SOFTWARE_NODE_REFERENCE(&nodes[SWNODE_SENSOR_ENDPOINT]);
342 sensor->dev_properties[0] = PROPERTY_ENTRY_U32(
343 sensor->prop_names.clock_frequency,
345 sensor->dev_properties[1] = PROPERTY_ENTRY_U32(
346 sensor->prop_names.rotation,
348 sensor->dev_properties[2] = PROPERTY_ENTRY_U32(
349 sensor->prop_names.orientation,
350 sensor->orientation);
351 if (sensor->vcm_type) {
353 SOFTWARE_NODE_REFERENCE(&sensor->swnodes[SWNODE_VCM]);
354 sensor->dev_properties[3] =
355 PROPERTY_ENTRY_REF_ARRAY("lens-focus", sensor->vcm_ref);
358 sensor->ep_properties[0] = PROPERTY_ENTRY_U32(
359 sensor->prop_names.bus_type,
360 V4L2_FWNODE_BUS_TYPE_CSI2_DPHY);
361 sensor->ep_properties[1] = PROPERTY_ENTRY_U32_ARRAY_LEN(
362 sensor->prop_names.data_lanes,
363 bridge->data_lanes, sensor->lanes);
364 sensor->ep_properties[2] = PROPERTY_ENTRY_REF_ARRAY(
365 sensor->prop_names.remote_endpoint,
368 if (cfg->nr_link_freqs > 0)
369 sensor->ep_properties[3] = PROPERTY_ENTRY_U64_ARRAY_LEN(
370 sensor->prop_names.link_frequencies,
374 sensor->ipu_properties[0] = PROPERTY_ENTRY_U32_ARRAY_LEN(
375 sensor->prop_names.data_lanes,
376 bridge->data_lanes, sensor->lanes);
377 sensor->ipu_properties[1] = PROPERTY_ENTRY_REF_ARRAY(
378 sensor->prop_names.remote_endpoint,
382 static void ipu_bridge_init_swnode_names(struct ipu_sensor *sensor)
384 snprintf(sensor->node_names.remote_port,
385 sizeof(sensor->node_names.remote_port),
386 SWNODE_GRAPH_PORT_NAME_FMT, sensor->link);
387 snprintf(sensor->node_names.port,
388 sizeof(sensor->node_names.port),
389 SWNODE_GRAPH_PORT_NAME_FMT, 0); /* Always port 0 */
390 snprintf(sensor->node_names.endpoint,
391 sizeof(sensor->node_names.endpoint),
392 SWNODE_GRAPH_ENDPOINT_NAME_FMT, 0); /* And endpoint 0 */
393 if (sensor->vcm_type) {
394 /* append link to distinguish nodes with same model VCM */
395 snprintf(sensor->node_names.vcm, sizeof(sensor->node_names.vcm),
396 "%s-%u", sensor->vcm_type, sensor->link);
399 if (sensor->csi_dev) {
400 snprintf(sensor->node_names.ivsc_sensor_port,
401 sizeof(sensor->node_names.ivsc_sensor_port),
402 SWNODE_GRAPH_PORT_NAME_FMT, 0);
403 snprintf(sensor->node_names.ivsc_ipu_port,
404 sizeof(sensor->node_names.ivsc_ipu_port),
405 SWNODE_GRAPH_PORT_NAME_FMT, 1);
409 static void ipu_bridge_init_swnode_group(struct ipu_sensor *sensor)
411 struct software_node *nodes = sensor->swnodes;
413 sensor->group[SWNODE_SENSOR_HID] = &nodes[SWNODE_SENSOR_HID];
414 sensor->group[SWNODE_SENSOR_PORT] = &nodes[SWNODE_SENSOR_PORT];
415 sensor->group[SWNODE_SENSOR_ENDPOINT] = &nodes[SWNODE_SENSOR_ENDPOINT];
416 sensor->group[SWNODE_IPU_PORT] = &nodes[SWNODE_IPU_PORT];
417 sensor->group[SWNODE_IPU_ENDPOINT] = &nodes[SWNODE_IPU_ENDPOINT];
418 if (sensor->vcm_type)
419 sensor->group[SWNODE_VCM] = &nodes[SWNODE_VCM];
421 if (sensor->csi_dev) {
422 sensor->group[SWNODE_IVSC_HID] =
423 &nodes[SWNODE_IVSC_HID];
424 sensor->group[SWNODE_IVSC_SENSOR_PORT] =
425 &nodes[SWNODE_IVSC_SENSOR_PORT];
426 sensor->group[SWNODE_IVSC_SENSOR_ENDPOINT] =
427 &nodes[SWNODE_IVSC_SENSOR_ENDPOINT];
428 sensor->group[SWNODE_IVSC_IPU_PORT] =
429 &nodes[SWNODE_IVSC_IPU_PORT];
430 sensor->group[SWNODE_IVSC_IPU_ENDPOINT] =
431 &nodes[SWNODE_IVSC_IPU_ENDPOINT];
433 if (sensor->vcm_type)
434 sensor->group[SWNODE_VCM] = &nodes[SWNODE_VCM];
436 if (sensor->vcm_type)
437 sensor->group[SWNODE_IVSC_HID] = &nodes[SWNODE_VCM];
441 static void ipu_bridge_create_connection_swnodes(struct ipu_bridge *bridge,
442 struct ipu_sensor *sensor)
444 struct ipu_node_names *names = &sensor->node_names;
445 struct software_node *nodes = sensor->swnodes;
447 ipu_bridge_init_swnode_names(sensor);
449 nodes[SWNODE_SENSOR_HID] = NODE_SENSOR(sensor->name,
450 sensor->dev_properties);
451 nodes[SWNODE_SENSOR_PORT] = NODE_PORT(sensor->node_names.port,
452 &nodes[SWNODE_SENSOR_HID]);
453 nodes[SWNODE_SENSOR_ENDPOINT] = NODE_ENDPOINT(
454 sensor->node_names.endpoint,
455 &nodes[SWNODE_SENSOR_PORT],
456 sensor->ep_properties);
457 nodes[SWNODE_IPU_PORT] = NODE_PORT(sensor->node_names.remote_port,
458 &bridge->ipu_hid_node);
459 nodes[SWNODE_IPU_ENDPOINT] = NODE_ENDPOINT(
460 sensor->node_names.endpoint,
461 &nodes[SWNODE_IPU_PORT],
462 sensor->ipu_properties);
464 if (sensor->csi_dev) {
465 snprintf(sensor->ivsc_name, sizeof(sensor->ivsc_name), "%s-%u",
466 acpi_device_hid(sensor->ivsc_adev), sensor->link);
468 nodes[SWNODE_IVSC_HID] = NODE_SENSOR(sensor->ivsc_name,
469 sensor->ivsc_properties);
470 nodes[SWNODE_IVSC_SENSOR_PORT] =
471 NODE_PORT(names->ivsc_sensor_port,
472 &nodes[SWNODE_IVSC_HID]);
473 nodes[SWNODE_IVSC_SENSOR_ENDPOINT] =
474 NODE_ENDPOINT(names->endpoint,
475 &nodes[SWNODE_IVSC_SENSOR_PORT],
476 sensor->ivsc_sensor_ep_properties);
477 nodes[SWNODE_IVSC_IPU_PORT] =
478 NODE_PORT(names->ivsc_ipu_port,
479 &nodes[SWNODE_IVSC_HID]);
480 nodes[SWNODE_IVSC_IPU_ENDPOINT] =
481 NODE_ENDPOINT(names->endpoint,
482 &nodes[SWNODE_IVSC_IPU_PORT],
483 sensor->ivsc_ipu_ep_properties);
486 nodes[SWNODE_VCM] = NODE_VCM(sensor->node_names.vcm);
488 ipu_bridge_init_swnode_group(sensor);
492 * The actual instantiation must be done from a workqueue to avoid
493 * a deadlock on taking list_lock from v4l2-async twice.
495 struct ipu_bridge_instantiate_vcm_work_data {
496 struct work_struct work;
497 struct device *sensor;
499 struct i2c_board_info board_info;
502 static void ipu_bridge_instantiate_vcm_work(struct work_struct *work)
504 struct ipu_bridge_instantiate_vcm_work_data *data =
505 container_of(work, struct ipu_bridge_instantiate_vcm_work_data,
507 struct acpi_device *adev = ACPI_COMPANION(data->sensor);
508 struct i2c_client *vcm_client;
509 bool put_fwnode = true;
513 * The client may get probed before the device_link gets added below
514 * make sure the sensor is powered-up during probe.
516 ret = pm_runtime_get_sync(data->sensor);
518 dev_err(data->sensor, "Error %d runtime-resuming sensor, cannot instantiate VCM\n",
524 * Note the client is created only once and then kept around
525 * even after a rmmod, just like the software-nodes.
527 vcm_client = i2c_acpi_new_device_by_fwnode(acpi_fwnode_handle(adev),
528 1, &data->board_info);
529 if (IS_ERR(vcm_client)) {
530 dev_err(data->sensor, "Error instantiating VCM client: %ld\n",
531 PTR_ERR(vcm_client));
535 device_link_add(&vcm_client->dev, data->sensor, DL_FLAG_PM_RUNTIME);
537 dev_info(data->sensor, "Instantiated %s VCM\n", data->board_info.type);
538 put_fwnode = false; /* Ownership has passed to the i2c-client */
541 pm_runtime_put(data->sensor);
542 put_device(data->sensor);
544 fwnode_handle_put(data->board_info.fwnode);
548 int ipu_bridge_instantiate_vcm(struct device *sensor)
550 struct ipu_bridge_instantiate_vcm_work_data *data;
551 struct fwnode_handle *vcm_fwnode;
552 struct i2c_client *vcm_client;
553 struct acpi_device *adev;
556 adev = ACPI_COMPANION(sensor);
560 vcm_fwnode = fwnode_find_reference(dev_fwnode(sensor), "lens-focus", 0);
561 if (IS_ERR(vcm_fwnode))
564 /* When reloading modules the client will already exist */
565 vcm_client = i2c_find_device_by_fwnode(vcm_fwnode);
567 fwnode_handle_put(vcm_fwnode);
568 put_device(&vcm_client->dev);
572 data = kzalloc(sizeof(*data), GFP_KERNEL);
574 fwnode_handle_put(vcm_fwnode);
578 INIT_WORK(&data->work, ipu_bridge_instantiate_vcm_work);
579 data->sensor = get_device(sensor);
580 snprintf(data->name, sizeof(data->name), "%s-VCM",
581 acpi_dev_name(adev));
582 data->board_info.dev_name = data->name;
583 data->board_info.fwnode = vcm_fwnode;
584 snprintf(data->board_info.type, sizeof(data->board_info.type),
585 "%pfwP", vcm_fwnode);
586 /* Strip "-<link>" postfix */
587 sep = strchrnul(data->board_info.type, '-');
590 queue_work(system_long_wq, &data->work);
594 EXPORT_SYMBOL_NS_GPL(ipu_bridge_instantiate_vcm, INTEL_IPU_BRIDGE);
596 static int ipu_bridge_instantiate_ivsc(struct ipu_sensor *sensor)
598 struct fwnode_handle *fwnode;
600 if (!sensor->csi_dev)
603 fwnode = software_node_fwnode(&sensor->swnodes[SWNODE_IVSC_HID]);
607 set_secondary_fwnode(sensor->csi_dev, fwnode);
612 static void ipu_bridge_unregister_sensors(struct ipu_bridge *bridge)
614 struct ipu_sensor *sensor;
617 for (i = 0; i < bridge->n_sensors; i++) {
618 sensor = &bridge->sensors[i];
619 software_node_unregister_node_group(sensor->group);
620 acpi_dev_put(sensor->adev);
621 put_device(sensor->csi_dev);
622 acpi_dev_put(sensor->ivsc_adev);
626 static int ipu_bridge_connect_sensor(const struct ipu_sensor_config *cfg,
627 struct ipu_bridge *bridge)
629 struct fwnode_handle *fwnode, *primary;
630 struct ipu_sensor *sensor;
631 struct acpi_device *adev;
634 for_each_acpi_dev_match(adev, cfg->hid, NULL, -1) {
635 if (!adev->status.enabled)
638 if (bridge->n_sensors >= IPU_MAX_PORTS) {
640 dev_err(bridge->dev, "Exceeded available IPU ports\n");
644 sensor = &bridge->sensors[bridge->n_sensors];
646 ret = bridge->parse_sensor_fwnode(adev, sensor);
650 snprintf(sensor->name, sizeof(sensor->name), "%s-%u",
651 cfg->hid, sensor->link);
653 ret = ipu_bridge_check_ivsc_dev(sensor, adev);
657 ipu_bridge_create_fwnode_properties(sensor, bridge, cfg);
658 ipu_bridge_create_connection_swnodes(bridge, sensor);
660 ret = software_node_register_node_group(sensor->group);
664 fwnode = software_node_fwnode(&sensor->swnodes[
668 goto err_free_swnodes;
671 sensor->adev = acpi_dev_get(adev);
673 primary = acpi_fwnode_handle(adev);
674 primary->secondary = fwnode;
676 ret = ipu_bridge_instantiate_ivsc(sensor);
678 goto err_free_swnodes;
680 dev_info(bridge->dev, "Found supported sensor %s\n",
681 acpi_dev_name(adev));
689 software_node_unregister_node_group(sensor->group);
691 put_device(sensor->csi_dev);
692 acpi_dev_put(sensor->ivsc_adev);
698 static int ipu_bridge_connect_sensors(struct ipu_bridge *bridge)
703 for (i = 0; i < ARRAY_SIZE(ipu_supported_sensors); i++) {
704 const struct ipu_sensor_config *cfg =
705 &ipu_supported_sensors[i];
707 ret = ipu_bridge_connect_sensor(cfg, bridge);
709 goto err_unregister_sensors;
714 err_unregister_sensors:
715 ipu_bridge_unregister_sensors(bridge);
719 static int ipu_bridge_ivsc_is_ready(void)
721 struct acpi_device *sensor_adev, *adev;
722 struct device *csi_dev;
726 for (i = 0; i < ARRAY_SIZE(ipu_supported_sensors); i++) {
727 const struct ipu_sensor_config *cfg =
728 &ipu_supported_sensors[i];
730 for_each_acpi_dev_match(sensor_adev, cfg->hid, NULL, -1) {
731 if (!sensor_adev->status.enabled)
734 adev = ipu_bridge_get_ivsc_acpi_dev(sensor_adev);
738 csi_dev = ipu_bridge_get_ivsc_csi_dev(adev);
750 int ipu_bridge_init(struct device *dev,
751 ipu_parse_sensor_fwnode_t parse_sensor_fwnode)
753 struct fwnode_handle *fwnode;
754 struct ipu_bridge *bridge;
758 if (!ipu_bridge_ivsc_is_ready())
759 return -EPROBE_DEFER;
761 bridge = kzalloc(sizeof(*bridge), GFP_KERNEL);
765 strscpy(bridge->ipu_node_name, IPU_HID,
766 sizeof(bridge->ipu_node_name));
767 bridge->ipu_hid_node.name = bridge->ipu_node_name;
769 bridge->parse_sensor_fwnode = parse_sensor_fwnode;
771 ret = software_node_register(&bridge->ipu_hid_node);
773 dev_err(dev, "Failed to register the IPU HID node\n");
774 goto err_free_bridge;
778 * Map the lane arrangement, which is fixed for the IPU3 (meaning we
779 * only need one, rather than one per sensor). We include it as a
780 * member of the struct ipu_bridge rather than a global variable so
781 * that it survives if the module is unloaded along with the rest of
784 for (i = 0; i < IPU_MAX_LANES; i++)
785 bridge->data_lanes[i] = i + 1;
787 ret = ipu_bridge_connect_sensors(bridge);
788 if (ret || bridge->n_sensors == 0)
789 goto err_unregister_ipu;
791 dev_info(dev, "Connected %d cameras\n", bridge->n_sensors);
793 fwnode = software_node_fwnode(&bridge->ipu_hid_node);
795 dev_err(dev, "Error getting fwnode from ipu software_node\n");
797 goto err_unregister_sensors;
800 set_secondary_fwnode(dev, fwnode);
804 err_unregister_sensors:
805 ipu_bridge_unregister_sensors(bridge);
807 software_node_unregister(&bridge->ipu_hid_node);
813 EXPORT_SYMBOL_NS_GPL(ipu_bridge_init, INTEL_IPU_BRIDGE);
815 MODULE_LICENSE("GPL");
816 MODULE_DESCRIPTION("Intel IPU Sensors Bridge driver");