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/property.h>
8 #include <media/v4l2-fwnode.h>
10 #include "ipu-bridge.h"
13 * Extend this array with ACPI Hardware IDs of devices known to be working
14 * plus the number of link-frequencies expected by their drivers, along with
15 * the frequency values in hertz. This is somewhat opportunistic way of adding
16 * support for this for now in the hopes of a better source for the information
17 * (possibly some encoded value in the SSDB buffer that we're unaware of)
18 * becoming apparent in the future.
20 * Do not add an entry for a sensor that is not actually supported.
22 static const struct ipu_sensor_config ipu_supported_sensors[] = {
23 /* Omnivision OV5693 */
24 IPU_SENSOR_CONFIG("INT33BE", 1, 419200000),
25 /* Omnivision OV8865 */
26 IPU_SENSOR_CONFIG("INT347A", 1, 360000000),
27 /* Omnivision OV7251 */
28 IPU_SENSOR_CONFIG("INT347E", 1, 319200000),
29 /* Omnivision OV2680 */
30 IPU_SENSOR_CONFIG("OVTI2680", 0),
31 /* Omnivision ov8856 */
32 IPU_SENSOR_CONFIG("OVTI8856", 3, 180000000, 360000000, 720000000),
33 /* Omnivision ov2740 */
34 IPU_SENSOR_CONFIG("INT3474", 1, 360000000),
36 IPU_SENSOR_CONFIG("INT3537", 1, 437000000),
37 /* Omnivision ov13b10 */
38 IPU_SENSOR_CONFIG("OVTIDB10", 1, 560000000),
41 static const struct ipu_property_names prop_names = {
42 .clock_frequency = "clock-frequency",
43 .rotation = "rotation",
44 .orientation = "orientation",
45 .bus_type = "bus-type",
46 .data_lanes = "data-lanes",
47 .remote_endpoint = "remote-endpoint",
48 .link_frequencies = "link-frequencies",
51 static const char * const ipu_vcm_types[] = {
63 static int ipu_bridge_read_acpi_buffer(struct acpi_device *adev, char *id,
66 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
67 union acpi_object *obj;
71 status = acpi_evaluate_object(adev->handle, id, NULL, &buffer);
72 if (ACPI_FAILURE(status))
77 dev_err(&adev->dev, "Couldn't locate ACPI buffer\n");
81 if (obj->type != ACPI_TYPE_BUFFER) {
82 dev_err(&adev->dev, "Not an ACPI buffer\n");
87 if (obj->buffer.length > size) {
88 dev_err(&adev->dev, "Given buffer is too small\n");
93 memcpy(data, obj->buffer.pointer, obj->buffer.length);
96 kfree(buffer.pointer);
100 static u32 ipu_bridge_parse_rotation(struct acpi_device *adev,
101 struct ipu_sensor_ssdb *ssdb)
103 switch (ssdb->degree) {
104 case IPU_SENSOR_ROTATION_NORMAL:
106 case IPU_SENSOR_ROTATION_INVERTED:
110 "Unknown rotation %d. Assume 0 degree rotation\n",
116 static enum v4l2_fwnode_orientation ipu_bridge_parse_orientation(struct acpi_device *adev)
118 enum v4l2_fwnode_orientation orientation;
119 struct acpi_pld_info *pld;
122 status = acpi_get_physical_device_location(adev->handle, &pld);
123 if (ACPI_FAILURE(status)) {
124 dev_warn(&adev->dev, "_PLD call failed, using default orientation\n");
125 return V4L2_FWNODE_ORIENTATION_EXTERNAL;
128 switch (pld->panel) {
129 case ACPI_PLD_PANEL_FRONT:
130 orientation = V4L2_FWNODE_ORIENTATION_FRONT;
132 case ACPI_PLD_PANEL_BACK:
133 orientation = V4L2_FWNODE_ORIENTATION_BACK;
135 case ACPI_PLD_PANEL_TOP:
136 case ACPI_PLD_PANEL_LEFT:
137 case ACPI_PLD_PANEL_RIGHT:
138 case ACPI_PLD_PANEL_UNKNOWN:
139 orientation = V4L2_FWNODE_ORIENTATION_EXTERNAL;
142 dev_warn(&adev->dev, "Unknown _PLD panel val %d\n", pld->panel);
143 orientation = V4L2_FWNODE_ORIENTATION_EXTERNAL;
151 static int ipu_bridge_parse_ssdb(struct acpi_device *adev,
152 struct ipu_sensor *sensor)
154 struct ipu_sensor_ssdb ssdb = {};
157 ret = ipu_bridge_read_acpi_buffer(adev, "SSDB", &ssdb, sizeof(ssdb));
161 if (ssdb.vcmtype > ARRAY_SIZE(ipu_vcm_types)) {
162 dev_warn(&adev->dev, "Unknown VCM type %d\n", ssdb.vcmtype);
166 if (ssdb.lanes > IPU_MAX_LANES) {
167 dev_err(&adev->dev, "Number of lanes in SSDB is invalid\n");
171 sensor->link = ssdb.link;
172 sensor->lanes = ssdb.lanes;
173 sensor->mclkspeed = ssdb.mclkspeed;
174 sensor->rotation = ipu_bridge_parse_rotation(adev, &ssdb);
175 sensor->orientation = ipu_bridge_parse_orientation(adev);
178 sensor->vcm_type = ipu_vcm_types[ssdb.vcmtype - 1];
183 static void ipu_bridge_create_fwnode_properties(
184 struct ipu_sensor *sensor,
185 struct ipu_bridge *bridge,
186 const struct ipu_sensor_config *cfg)
188 sensor->prop_names = prop_names;
190 sensor->local_ref[0] = SOFTWARE_NODE_REFERENCE(&sensor->swnodes[SWNODE_IPU_ENDPOINT]);
191 sensor->remote_ref[0] = SOFTWARE_NODE_REFERENCE(&sensor->swnodes[SWNODE_SENSOR_ENDPOINT]);
193 sensor->dev_properties[0] = PROPERTY_ENTRY_U32(
194 sensor->prop_names.clock_frequency,
196 sensor->dev_properties[1] = PROPERTY_ENTRY_U32(
197 sensor->prop_names.rotation,
199 sensor->dev_properties[2] = PROPERTY_ENTRY_U32(
200 sensor->prop_names.orientation,
201 sensor->orientation);
202 if (sensor->vcm_type) {
204 SOFTWARE_NODE_REFERENCE(&sensor->swnodes[SWNODE_VCM]);
205 sensor->dev_properties[3] =
206 PROPERTY_ENTRY_REF_ARRAY("lens-focus", sensor->vcm_ref);
209 sensor->ep_properties[0] = PROPERTY_ENTRY_U32(
210 sensor->prop_names.bus_type,
211 V4L2_FWNODE_BUS_TYPE_CSI2_DPHY);
212 sensor->ep_properties[1] = PROPERTY_ENTRY_U32_ARRAY_LEN(
213 sensor->prop_names.data_lanes,
214 bridge->data_lanes, sensor->lanes);
215 sensor->ep_properties[2] = PROPERTY_ENTRY_REF_ARRAY(
216 sensor->prop_names.remote_endpoint,
219 if (cfg->nr_link_freqs > 0)
220 sensor->ep_properties[3] = PROPERTY_ENTRY_U64_ARRAY_LEN(
221 sensor->prop_names.link_frequencies,
225 sensor->ipu_properties[0] = PROPERTY_ENTRY_U32_ARRAY_LEN(
226 sensor->prop_names.data_lanes,
227 bridge->data_lanes, sensor->lanes);
228 sensor->ipu_properties[1] = PROPERTY_ENTRY_REF_ARRAY(
229 sensor->prop_names.remote_endpoint,
233 static void ipu_bridge_init_swnode_names(struct ipu_sensor *sensor)
235 snprintf(sensor->node_names.remote_port,
236 sizeof(sensor->node_names.remote_port),
237 SWNODE_GRAPH_PORT_NAME_FMT, sensor->link);
238 snprintf(sensor->node_names.port,
239 sizeof(sensor->node_names.port),
240 SWNODE_GRAPH_PORT_NAME_FMT, 0); /* Always port 0 */
241 snprintf(sensor->node_names.endpoint,
242 sizeof(sensor->node_names.endpoint),
243 SWNODE_GRAPH_ENDPOINT_NAME_FMT, 0); /* And endpoint 0 */
244 if (sensor->vcm_type) {
245 /* append link to distinguish nodes with same model VCM */
246 snprintf(sensor->node_names.vcm, sizeof(sensor->node_names.vcm),
247 "%s-%u", sensor->vcm_type, sensor->link);
251 static void ipu_bridge_init_swnode_group(struct ipu_sensor *sensor)
253 struct software_node *nodes = sensor->swnodes;
255 sensor->group[SWNODE_SENSOR_HID] = &nodes[SWNODE_SENSOR_HID];
256 sensor->group[SWNODE_SENSOR_PORT] = &nodes[SWNODE_SENSOR_PORT];
257 sensor->group[SWNODE_SENSOR_ENDPOINT] = &nodes[SWNODE_SENSOR_ENDPOINT];
258 sensor->group[SWNODE_IPU_PORT] = &nodes[SWNODE_IPU_PORT];
259 sensor->group[SWNODE_IPU_ENDPOINT] = &nodes[SWNODE_IPU_ENDPOINT];
260 if (sensor->vcm_type)
261 sensor->group[SWNODE_VCM] = &nodes[SWNODE_VCM];
264 static void ipu_bridge_create_connection_swnodes(struct ipu_bridge *bridge,
265 struct ipu_sensor *sensor)
267 struct software_node *nodes = sensor->swnodes;
269 ipu_bridge_init_swnode_names(sensor);
271 nodes[SWNODE_SENSOR_HID] = NODE_SENSOR(sensor->name,
272 sensor->dev_properties);
273 nodes[SWNODE_SENSOR_PORT] = NODE_PORT(sensor->node_names.port,
274 &nodes[SWNODE_SENSOR_HID]);
275 nodes[SWNODE_SENSOR_ENDPOINT] = NODE_ENDPOINT(
276 sensor->node_names.endpoint,
277 &nodes[SWNODE_SENSOR_PORT],
278 sensor->ep_properties);
279 nodes[SWNODE_IPU_PORT] = NODE_PORT(sensor->node_names.remote_port,
280 &bridge->ipu_hid_node);
281 nodes[SWNODE_IPU_ENDPOINT] = NODE_ENDPOINT(
282 sensor->node_names.endpoint,
283 &nodes[SWNODE_IPU_PORT],
284 sensor->ipu_properties);
285 nodes[SWNODE_VCM] = NODE_VCM(sensor->node_names.vcm);
287 ipu_bridge_init_swnode_group(sensor);
290 static void ipu_bridge_instantiate_vcm_i2c_client(struct ipu_sensor *sensor)
292 struct i2c_board_info board_info = { };
295 if (!sensor->vcm_type)
298 snprintf(name, sizeof(name), "%s-VCM", acpi_dev_name(sensor->adev));
299 board_info.dev_name = name;
300 strscpy(board_info.type, sensor->vcm_type, ARRAY_SIZE(board_info.type));
301 board_info.swnode = &sensor->swnodes[SWNODE_VCM];
303 sensor->vcm_i2c_client =
304 i2c_acpi_new_device_by_fwnode(acpi_fwnode_handle(sensor->adev),
306 if (IS_ERR(sensor->vcm_i2c_client)) {
307 dev_warn(&sensor->adev->dev, "Error instantiation VCM i2c-client: %ld\n",
308 PTR_ERR(sensor->vcm_i2c_client));
309 sensor->vcm_i2c_client = NULL;
313 static void ipu_bridge_unregister_sensors(struct ipu_bridge *bridge)
315 struct ipu_sensor *sensor;
318 for (i = 0; i < bridge->n_sensors; i++) {
319 sensor = &bridge->sensors[i];
320 software_node_unregister_node_group(sensor->group);
321 acpi_dev_put(sensor->adev);
322 i2c_unregister_device(sensor->vcm_i2c_client);
326 static int ipu_bridge_connect_sensor(const struct ipu_sensor_config *cfg,
327 struct ipu_bridge *bridge)
329 struct fwnode_handle *fwnode, *primary;
330 struct ipu_sensor *sensor;
331 struct acpi_device *adev;
334 for_each_acpi_dev_match(adev, cfg->hid, NULL, -1) {
335 if (!adev->status.enabled)
338 if (bridge->n_sensors >= IPU_MAX_PORTS) {
340 dev_err(bridge->dev, "Exceeded available IPU ports\n");
344 sensor = &bridge->sensors[bridge->n_sensors];
346 * Borrow our adev ref to the sensor for now, on success
347 * acpi_dev_get(adev) is done further below.
351 ret = ipu_bridge_parse_ssdb(adev, sensor);
355 snprintf(sensor->name, sizeof(sensor->name), "%s-%u",
356 cfg->hid, sensor->link);
358 ipu_bridge_create_fwnode_properties(sensor, bridge, cfg);
359 ipu_bridge_create_connection_swnodes(bridge, sensor);
361 ret = software_node_register_node_group(sensor->group);
365 fwnode = software_node_fwnode(&sensor->swnodes[
369 goto err_free_swnodes;
372 sensor->adev = acpi_dev_get(adev);
374 primary = acpi_fwnode_handle(adev);
375 primary->secondary = fwnode;
377 ipu_bridge_instantiate_vcm_i2c_client(sensor);
379 dev_info(bridge->dev, "Found supported sensor %s\n",
380 acpi_dev_name(adev));
388 software_node_unregister_node_group(sensor->group);
394 static int ipu_bridge_connect_sensors(struct ipu_bridge *bridge)
399 for (i = 0; i < ARRAY_SIZE(ipu_supported_sensors); i++) {
400 const struct ipu_sensor_config *cfg =
401 &ipu_supported_sensors[i];
403 ret = ipu_bridge_connect_sensor(cfg, bridge);
405 goto err_unregister_sensors;
410 err_unregister_sensors:
411 ipu_bridge_unregister_sensors(bridge);
416 * The VCM cannot be probed until the PMIC is completely setup. We cannot rely
417 * on -EPROBE_DEFER for this, since the consumer<->supplier relations between
418 * the VCM and regulators/clks are not described in ACPI, instead they are
419 * passed as board-data to the PMIC drivers. Since -PROBE_DEFER does not work
420 * for the clks/regulators the VCM i2c-clients must not be instantiated until
421 * the PMIC is fully setup.
423 * The sensor/VCM ACPI device has an ACPI _DEP on the PMIC, check this using the
424 * acpi_dev_ready_for_enumeration() helper, like the i2c-core-acpi code does
427 static int ipu_bridge_sensors_are_ready(void)
429 struct acpi_device *adev;
433 for (i = 0; i < ARRAY_SIZE(ipu_supported_sensors); i++) {
434 const struct ipu_sensor_config *cfg =
435 &ipu_supported_sensors[i];
437 for_each_acpi_dev_match(adev, cfg->hid, NULL, -1) {
438 if (!adev->status.enabled)
441 if (!acpi_dev_ready_for_enumeration(adev))
449 int ipu_bridge_init(struct device *dev)
451 struct fwnode_handle *fwnode;
452 struct ipu_bridge *bridge;
456 if (!ipu_bridge_sensors_are_ready())
457 return -EPROBE_DEFER;
459 bridge = kzalloc(sizeof(*bridge), GFP_KERNEL);
463 strscpy(bridge->ipu_node_name, IPU_HID,
464 sizeof(bridge->ipu_node_name));
465 bridge->ipu_hid_node.name = bridge->ipu_node_name;
468 ret = software_node_register(&bridge->ipu_hid_node);
470 dev_err(dev, "Failed to register the IPU HID node\n");
471 goto err_free_bridge;
475 * Map the lane arrangement, which is fixed for the IPU3 (meaning we
476 * only need one, rather than one per sensor). We include it as a
477 * member of the struct ipu_bridge rather than a global variable so
478 * that it survives if the module is unloaded along with the rest of
481 for (i = 0; i < IPU_MAX_LANES; i++)
482 bridge->data_lanes[i] = i + 1;
484 ret = ipu_bridge_connect_sensors(bridge);
485 if (ret || bridge->n_sensors == 0)
486 goto err_unregister_ipu;
488 dev_info(dev, "Connected %d cameras\n", bridge->n_sensors);
490 fwnode = software_node_fwnode(&bridge->ipu_hid_node);
492 dev_err(dev, "Error getting fwnode from ipu software_node\n");
494 goto err_unregister_sensors;
497 set_secondary_fwnode(dev, fwnode);
501 err_unregister_sensors:
502 ipu_bridge_unregister_sensors(bridge);
504 software_node_unregister(&bridge->ipu_hid_node);
510 EXPORT_SYMBOL_NS_GPL(ipu_bridge_init, INTEL_IPU_BRIDGE);
512 MODULE_LICENSE("GPL");
513 MODULE_DESCRIPTION("Intel IPU Sensors Bridge driver");