1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * V4L2 fwnode binding parsing library
4 *
5 * The origins of the V4L2 fwnode library are in V4L2 OF library that
6 * formerly was located in v4l2-of.c.
7 *
8 * Copyright (c) 2016 Intel Corporation.
9 * Author: Sakari Ailus <sakari.ailus@linux.intel.com>
10 *
11 * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
12 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
13 *
14 * Copyright (C) 2012 Renesas Electronics Corp.
15 * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
16 */
17 #include <linux/acpi.h>
18 #include <linux/kernel.h>
19 #include <linux/mm.h>
20 #include <linux/module.h>
21 #include <linux/of.h>
22 #include <linux/property.h>
23 #include <linux/slab.h>
24 #include <linux/string.h>
25 #include <linux/types.h>
26
27 #include <media/v4l2-async.h>
28 #include <media/v4l2-fwnode.h>
29 #include <media/v4l2-subdev.h>
30
31 #include "v4l2-subdev-priv.h"
32
33 static const struct v4l2_fwnode_bus_conv {
34 enum v4l2_fwnode_bus_type fwnode_bus_type;
35 enum v4l2_mbus_type mbus_type;
36 const char *name;
37 } buses[] = {
38 {
39 V4L2_FWNODE_BUS_TYPE_GUESS,
40 V4L2_MBUS_UNKNOWN,
41 "not specified",
42 }, {
43 V4L2_FWNODE_BUS_TYPE_CSI2_CPHY,
44 V4L2_MBUS_CSI2_CPHY,
45 "MIPI CSI-2 C-PHY",
46 }, {
47 V4L2_FWNODE_BUS_TYPE_CSI1,
48 V4L2_MBUS_CSI1,
49 "MIPI CSI-1",
50 }, {
51 V4L2_FWNODE_BUS_TYPE_CCP2,
52 V4L2_MBUS_CCP2,
53 "compact camera port 2",
54 }, {
55 V4L2_FWNODE_BUS_TYPE_CSI2_DPHY,
56 V4L2_MBUS_CSI2_DPHY,
57 "MIPI CSI-2 D-PHY",
58 }, {
59 V4L2_FWNODE_BUS_TYPE_PARALLEL,
60 V4L2_MBUS_PARALLEL,
61 "parallel",
62 }, {
63 V4L2_FWNODE_BUS_TYPE_BT656,
64 V4L2_MBUS_BT656,
65 "Bt.656",
66 }, {
67 V4L2_FWNODE_BUS_TYPE_DPI,
68 V4L2_MBUS_DPI,
69 "DPI",
70 }
71 };
72
73 static const struct v4l2_fwnode_bus_conv *
get_v4l2_fwnode_bus_conv_by_fwnode_bus(enum v4l2_fwnode_bus_type type)74 get_v4l2_fwnode_bus_conv_by_fwnode_bus(enum v4l2_fwnode_bus_type type)
75 {
76 unsigned int i;
77
78 for (i = 0; i < ARRAY_SIZE(buses); i++)
79 if (buses[i].fwnode_bus_type == type)
80 return &buses[i];
81
82 return NULL;
83 }
84
85 static enum v4l2_mbus_type
v4l2_fwnode_bus_type_to_mbus(enum v4l2_fwnode_bus_type type)86 v4l2_fwnode_bus_type_to_mbus(enum v4l2_fwnode_bus_type type)
87 {
88 const struct v4l2_fwnode_bus_conv *conv =
89 get_v4l2_fwnode_bus_conv_by_fwnode_bus(type);
90
91 return conv ? conv->mbus_type : V4L2_MBUS_INVALID;
92 }
93
94 static const char *
v4l2_fwnode_bus_type_to_string(enum v4l2_fwnode_bus_type type)95 v4l2_fwnode_bus_type_to_string(enum v4l2_fwnode_bus_type type)
96 {
97 const struct v4l2_fwnode_bus_conv *conv =
98 get_v4l2_fwnode_bus_conv_by_fwnode_bus(type);
99
100 return conv ? conv->name : "not found";
101 }
102
103 static const struct v4l2_fwnode_bus_conv *
get_v4l2_fwnode_bus_conv_by_mbus(enum v4l2_mbus_type type)104 get_v4l2_fwnode_bus_conv_by_mbus(enum v4l2_mbus_type type)
105 {
106 unsigned int i;
107
108 for (i = 0; i < ARRAY_SIZE(buses); i++)
109 if (buses[i].mbus_type == type)
110 return &buses[i];
111
112 return NULL;
113 }
114
115 static const char *
v4l2_fwnode_mbus_type_to_string(enum v4l2_mbus_type type)116 v4l2_fwnode_mbus_type_to_string(enum v4l2_mbus_type type)
117 {
118 const struct v4l2_fwnode_bus_conv *conv =
119 get_v4l2_fwnode_bus_conv_by_mbus(type);
120
121 return conv ? conv->name : "not found";
122 }
123
v4l2_fwnode_endpoint_parse_csi2_bus(struct fwnode_handle * fwnode,struct v4l2_fwnode_endpoint * vep,enum v4l2_mbus_type bus_type)124 static int v4l2_fwnode_endpoint_parse_csi2_bus(struct fwnode_handle *fwnode,
125 struct v4l2_fwnode_endpoint *vep,
126 enum v4l2_mbus_type bus_type)
127 {
128 struct v4l2_mbus_config_mipi_csi2 *bus = &vep->bus.mipi_csi2;
129 bool have_clk_lane = false, have_data_lanes = false,
130 have_lane_polarities = false, have_line_orders = false;
131 unsigned int flags = 0, lanes_used = 0;
132 u32 array[1 + V4L2_MBUS_CSI2_MAX_DATA_LANES];
133 u32 clock_lane = 0;
134 unsigned int num_data_lanes = 0;
135 bool use_default_lane_mapping = false;
136 unsigned int i;
137 u32 v;
138 int rval;
139
140 if (bus_type == V4L2_MBUS_CSI2_DPHY ||
141 bus_type == V4L2_MBUS_CSI2_CPHY) {
142 use_default_lane_mapping = true;
143
144 num_data_lanes = min_t(u32, bus->num_data_lanes,
145 V4L2_MBUS_CSI2_MAX_DATA_LANES);
146
147 clock_lane = bus->clock_lane;
148 if (clock_lane)
149 use_default_lane_mapping = false;
150
151 for (i = 0; i < num_data_lanes; i++) {
152 array[i] = bus->data_lanes[i];
153 if (array[i])
154 use_default_lane_mapping = false;
155 }
156
157 if (use_default_lane_mapping)
158 pr_debug("no lane mapping given, using defaults\n");
159 }
160
161 rval = fwnode_property_count_u32(fwnode, "data-lanes");
162 if (rval > 0) {
163 num_data_lanes =
164 min_t(int, V4L2_MBUS_CSI2_MAX_DATA_LANES, rval);
165
166 fwnode_property_read_u32_array(fwnode, "data-lanes", array,
167 num_data_lanes);
168
169 have_data_lanes = true;
170 if (use_default_lane_mapping) {
171 pr_debug("data-lanes property exists; disabling default mapping\n");
172 use_default_lane_mapping = false;
173 }
174 }
175
176 for (i = 0; i < num_data_lanes; i++) {
177 if (lanes_used & BIT(array[i])) {
178 if (have_data_lanes || !use_default_lane_mapping)
179 pr_warn("duplicated lane %u in data-lanes, using defaults\n",
180 array[i]);
181 use_default_lane_mapping = true;
182 }
183 lanes_used |= BIT(array[i]);
184
185 if (have_data_lanes)
186 pr_debug("lane %u position %u\n", i, array[i]);
187 }
188
189 rval = fwnode_property_count_u32(fwnode, "lane-polarities");
190 if (rval > 0) {
191 if (rval != 1 + num_data_lanes /* clock+data */) {
192 pr_warn("invalid number of lane-polarities entries (need %u, got %u)\n",
193 1 + num_data_lanes, rval);
194 return -EINVAL;
195 }
196
197 have_lane_polarities = true;
198 }
199
200 rval = fwnode_property_count_u32(fwnode, "line-orders");
201 if (rval > 0) {
202 if (rval != num_data_lanes) {
203 pr_warn("invalid number of line-orders entries (need %u, got %u)\n",
204 num_data_lanes, rval);
205 return -EINVAL;
206 }
207
208 have_line_orders = true;
209 }
210
211 if (!fwnode_property_read_u32(fwnode, "clock-lanes", &v)) {
212 clock_lane = v;
213 pr_debug("clock lane position %u\n", v);
214 have_clk_lane = true;
215 }
216
217 if (have_clk_lane && lanes_used & BIT(clock_lane) &&
218 !use_default_lane_mapping) {
219 pr_warn("duplicated lane %u in clock-lanes, using defaults\n",
220 v);
221 use_default_lane_mapping = true;
222 }
223
224 if (fwnode_property_present(fwnode, "clock-noncontinuous")) {
225 flags |= V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
226 pr_debug("non-continuous clock\n");
227 }
228
229 if (bus_type == V4L2_MBUS_CSI2_DPHY ||
230 bus_type == V4L2_MBUS_CSI2_CPHY ||
231 lanes_used || have_clk_lane || flags) {
232 /* Only D-PHY has a clock lane. */
233 unsigned int dfl_data_lane_index =
234 bus_type == V4L2_MBUS_CSI2_DPHY;
235
236 bus->flags = flags;
237 if (bus_type == V4L2_MBUS_UNKNOWN)
238 vep->bus_type = V4L2_MBUS_CSI2_DPHY;
239 bus->num_data_lanes = num_data_lanes;
240
241 if (use_default_lane_mapping) {
242 bus->clock_lane = 0;
243 for (i = 0; i < num_data_lanes; i++)
244 bus->data_lanes[i] = dfl_data_lane_index + i;
245 } else {
246 bus->clock_lane = clock_lane;
247 for (i = 0; i < num_data_lanes; i++)
248 bus->data_lanes[i] = array[i];
249 }
250
251 if (have_lane_polarities) {
252 fwnode_property_read_u32_array(fwnode,
253 "lane-polarities", array,
254 1 + num_data_lanes);
255
256 for (i = 0; i < 1 + num_data_lanes; i++) {
257 bus->lane_polarities[i] = array[i];
258 pr_debug("lane %u polarity %sinverted",
259 i, array[i] ? "" : "not ");
260 }
261 } else {
262 pr_debug("no lane polarities defined, assuming not inverted\n");
263 }
264
265 if (have_line_orders) {
266 fwnode_property_read_u32_array(fwnode,
267 "line-orders", array,
268 num_data_lanes);
269
270 for (i = 0; i < num_data_lanes; i++) {
271 static const char * const orders[] = {
272 "ABC", "ACB", "BAC", "BCA", "CAB", "CBA"
273 };
274
275 if (array[i] >= ARRAY_SIZE(orders)) {
276 pr_warn("lane %u invalid line-order assuming ABC (got %u)\n",
277 i, array[i]);
278 bus->line_orders[i] =
279 V4L2_MBUS_CSI2_CPHY_LINE_ORDER_ABC;
280 continue;
281 }
282
283 bus->line_orders[i] = array[i];
284 pr_debug("lane %u line order %s", i,
285 orders[array[i]]);
286 }
287 } else {
288 for (i = 0; i < num_data_lanes; i++)
289 bus->line_orders[i] =
290 V4L2_MBUS_CSI2_CPHY_LINE_ORDER_ABC;
291
292 pr_debug("no line orders defined, assuming ABC\n");
293 }
294 }
295
296 return 0;
297 }
298
299 #define PARALLEL_MBUS_FLAGS (V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
300 V4L2_MBUS_HSYNC_ACTIVE_LOW | \
301 V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
302 V4L2_MBUS_VSYNC_ACTIVE_LOW | \
303 V4L2_MBUS_FIELD_EVEN_HIGH | \
304 V4L2_MBUS_FIELD_EVEN_LOW)
305
306 static void
v4l2_fwnode_endpoint_parse_parallel_bus(struct fwnode_handle * fwnode,struct v4l2_fwnode_endpoint * vep,enum v4l2_mbus_type bus_type)307 v4l2_fwnode_endpoint_parse_parallel_bus(struct fwnode_handle *fwnode,
308 struct v4l2_fwnode_endpoint *vep,
309 enum v4l2_mbus_type bus_type)
310 {
311 struct v4l2_mbus_config_parallel *bus = &vep->bus.parallel;
312 unsigned int flags = 0;
313 u32 v;
314
315 if (bus_type == V4L2_MBUS_PARALLEL || bus_type == V4L2_MBUS_BT656)
316 flags = bus->flags;
317
318 if (!fwnode_property_read_u32(fwnode, "hsync-active", &v)) {
319 flags &= ~(V4L2_MBUS_HSYNC_ACTIVE_HIGH |
320 V4L2_MBUS_HSYNC_ACTIVE_LOW);
321 flags |= v ? V4L2_MBUS_HSYNC_ACTIVE_HIGH :
322 V4L2_MBUS_HSYNC_ACTIVE_LOW;
323 pr_debug("hsync-active %s\n", v ? "high" : "low");
324 }
325
326 if (!fwnode_property_read_u32(fwnode, "vsync-active", &v)) {
327 flags &= ~(V4L2_MBUS_VSYNC_ACTIVE_HIGH |
328 V4L2_MBUS_VSYNC_ACTIVE_LOW);
329 flags |= v ? V4L2_MBUS_VSYNC_ACTIVE_HIGH :
330 V4L2_MBUS_VSYNC_ACTIVE_LOW;
331 pr_debug("vsync-active %s\n", v ? "high" : "low");
332 }
333
334 if (!fwnode_property_read_u32(fwnode, "field-even-active", &v)) {
335 flags &= ~(V4L2_MBUS_FIELD_EVEN_HIGH |
336 V4L2_MBUS_FIELD_EVEN_LOW);
337 flags |= v ? V4L2_MBUS_FIELD_EVEN_HIGH :
338 V4L2_MBUS_FIELD_EVEN_LOW;
339 pr_debug("field-even-active %s\n", v ? "high" : "low");
340 }
341
342 if (!fwnode_property_read_u32(fwnode, "pclk-sample", &v)) {
343 flags &= ~(V4L2_MBUS_PCLK_SAMPLE_RISING |
344 V4L2_MBUS_PCLK_SAMPLE_FALLING |
345 V4L2_MBUS_PCLK_SAMPLE_DUALEDGE);
346 switch (v) {
347 case 0:
348 flags |= V4L2_MBUS_PCLK_SAMPLE_FALLING;
349 pr_debug("pclk-sample low\n");
350 break;
351 case 1:
352 flags |= V4L2_MBUS_PCLK_SAMPLE_RISING;
353 pr_debug("pclk-sample high\n");
354 break;
355 case 2:
356 flags |= V4L2_MBUS_PCLK_SAMPLE_DUALEDGE;
357 pr_debug("pclk-sample dual edge\n");
358 break;
359 default:
360 pr_warn("invalid argument for pclk-sample");
361 break;
362 }
363 }
364
365 if (!fwnode_property_read_u32(fwnode, "data-active", &v)) {
366 flags &= ~(V4L2_MBUS_DATA_ACTIVE_HIGH |
367 V4L2_MBUS_DATA_ACTIVE_LOW);
368 flags |= v ? V4L2_MBUS_DATA_ACTIVE_HIGH :
369 V4L2_MBUS_DATA_ACTIVE_LOW;
370 pr_debug("data-active %s\n", v ? "high" : "low");
371 }
372
373 if (fwnode_property_present(fwnode, "slave-mode")) {
374 pr_debug("slave mode\n");
375 flags &= ~V4L2_MBUS_MASTER;
376 flags |= V4L2_MBUS_SLAVE;
377 } else {
378 flags &= ~V4L2_MBUS_SLAVE;
379 flags |= V4L2_MBUS_MASTER;
380 }
381
382 if (!fwnode_property_read_u32(fwnode, "bus-width", &v)) {
383 bus->bus_width = v;
384 pr_debug("bus-width %u\n", v);
385 }
386
387 if (!fwnode_property_read_u32(fwnode, "data-shift", &v)) {
388 bus->data_shift = v;
389 pr_debug("data-shift %u\n", v);
390 }
391
392 if (!fwnode_property_read_u32(fwnode, "sync-on-green-active", &v)) {
393 flags &= ~(V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH |
394 V4L2_MBUS_VIDEO_SOG_ACTIVE_LOW);
395 flags |= v ? V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH :
396 V4L2_MBUS_VIDEO_SOG_ACTIVE_LOW;
397 pr_debug("sync-on-green-active %s\n", v ? "high" : "low");
398 }
399
400 if (!fwnode_property_read_u32(fwnode, "data-enable-active", &v)) {
401 flags &= ~(V4L2_MBUS_DATA_ENABLE_HIGH |
402 V4L2_MBUS_DATA_ENABLE_LOW);
403 flags |= v ? V4L2_MBUS_DATA_ENABLE_HIGH :
404 V4L2_MBUS_DATA_ENABLE_LOW;
405 pr_debug("data-enable-active %s\n", v ? "high" : "low");
406 }
407
408 switch (bus_type) {
409 default:
410 bus->flags = flags;
411 if (flags & PARALLEL_MBUS_FLAGS)
412 vep->bus_type = V4L2_MBUS_PARALLEL;
413 else
414 vep->bus_type = V4L2_MBUS_BT656;
415 break;
416 case V4L2_MBUS_PARALLEL:
417 vep->bus_type = V4L2_MBUS_PARALLEL;
418 bus->flags = flags;
419 break;
420 case V4L2_MBUS_BT656:
421 vep->bus_type = V4L2_MBUS_BT656;
422 bus->flags = flags & ~PARALLEL_MBUS_FLAGS;
423 break;
424 }
425 }
426
427 static void
v4l2_fwnode_endpoint_parse_csi1_bus(struct fwnode_handle * fwnode,struct v4l2_fwnode_endpoint * vep,enum v4l2_mbus_type bus_type)428 v4l2_fwnode_endpoint_parse_csi1_bus(struct fwnode_handle *fwnode,
429 struct v4l2_fwnode_endpoint *vep,
430 enum v4l2_mbus_type bus_type)
431 {
432 struct v4l2_mbus_config_mipi_csi1 *bus = &vep->bus.mipi_csi1;
433 u32 v;
434
435 if (!fwnode_property_read_u32(fwnode, "clock-inv", &v)) {
436 bus->clock_inv = v;
437 pr_debug("clock-inv %u\n", v);
438 }
439
440 if (!fwnode_property_read_u32(fwnode, "strobe", &v)) {
441 bus->strobe = v;
442 pr_debug("strobe %u\n", v);
443 }
444
445 if (!fwnode_property_read_u32(fwnode, "data-lanes", &v)) {
446 bus->data_lane = v;
447 pr_debug("data-lanes %u\n", v);
448 }
449
450 if (!fwnode_property_read_u32(fwnode, "clock-lanes", &v)) {
451 bus->clock_lane = v;
452 pr_debug("clock-lanes %u\n", v);
453 }
454
455 if (bus_type == V4L2_MBUS_CCP2)
456 vep->bus_type = V4L2_MBUS_CCP2;
457 else
458 vep->bus_type = V4L2_MBUS_CSI1;
459 }
460
__v4l2_fwnode_endpoint_parse(struct fwnode_handle * fwnode,struct v4l2_fwnode_endpoint * vep)461 static int __v4l2_fwnode_endpoint_parse(struct fwnode_handle *fwnode,
462 struct v4l2_fwnode_endpoint *vep)
463 {
464 u32 bus_type = V4L2_FWNODE_BUS_TYPE_GUESS;
465 enum v4l2_mbus_type mbus_type;
466 int rval;
467
468 if (!fwnode)
469 return -EINVAL;
470
471 pr_debug("===== begin parsing endpoint %pfw\n", fwnode);
472
473 fwnode_property_read_u32(fwnode, "bus-type", &bus_type);
474 pr_debug("fwnode video bus type %s (%u), mbus type %s (%u)\n",
475 v4l2_fwnode_bus_type_to_string(bus_type), bus_type,
476 v4l2_fwnode_mbus_type_to_string(vep->bus_type),
477 vep->bus_type);
478 mbus_type = v4l2_fwnode_bus_type_to_mbus(bus_type);
479 if (mbus_type == V4L2_MBUS_INVALID) {
480 pr_debug("unsupported bus type %u\n", bus_type);
481 return -EINVAL;
482 }
483
484 if (vep->bus_type != V4L2_MBUS_UNKNOWN) {
485 if (mbus_type != V4L2_MBUS_UNKNOWN &&
486 vep->bus_type != mbus_type) {
487 pr_debug("expecting bus type %s\n",
488 v4l2_fwnode_mbus_type_to_string(vep->bus_type));
489 return -ENXIO;
490 }
491 } else {
492 vep->bus_type = mbus_type;
493 }
494
495 switch (vep->bus_type) {
496 case V4L2_MBUS_UNKNOWN:
497 rval = v4l2_fwnode_endpoint_parse_csi2_bus(fwnode, vep,
498 V4L2_MBUS_UNKNOWN);
499 if (rval)
500 return rval;
501
502 if (vep->bus_type == V4L2_MBUS_UNKNOWN)
503 v4l2_fwnode_endpoint_parse_parallel_bus(fwnode, vep,
504 V4L2_MBUS_UNKNOWN);
505
506 pr_debug("assuming media bus type %s (%u)\n",
507 v4l2_fwnode_mbus_type_to_string(vep->bus_type),
508 vep->bus_type);
509
510 break;
511 case V4L2_MBUS_CCP2:
512 case V4L2_MBUS_CSI1:
513 v4l2_fwnode_endpoint_parse_csi1_bus(fwnode, vep, vep->bus_type);
514
515 break;
516 case V4L2_MBUS_CSI2_DPHY:
517 case V4L2_MBUS_CSI2_CPHY:
518 rval = v4l2_fwnode_endpoint_parse_csi2_bus(fwnode, vep,
519 vep->bus_type);
520 if (rval)
521 return rval;
522
523 break;
524 case V4L2_MBUS_PARALLEL:
525 case V4L2_MBUS_BT656:
526 v4l2_fwnode_endpoint_parse_parallel_bus(fwnode, vep,
527 vep->bus_type);
528
529 break;
530 default:
531 pr_warn("unsupported bus type %u\n", mbus_type);
532 return -EINVAL;
533 }
534
535 fwnode_graph_parse_endpoint(fwnode, &vep->base);
536
537 return 0;
538 }
539
v4l2_fwnode_endpoint_parse(struct fwnode_handle * fwnode,struct v4l2_fwnode_endpoint * vep)540 int v4l2_fwnode_endpoint_parse(struct fwnode_handle *fwnode,
541 struct v4l2_fwnode_endpoint *vep)
542 {
543 int ret;
544
545 ret = __v4l2_fwnode_endpoint_parse(fwnode, vep);
546
547 pr_debug("===== end parsing endpoint %pfw\n", fwnode);
548
549 return ret;
550 }
551 EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoint_parse);
552
v4l2_fwnode_endpoint_free(struct v4l2_fwnode_endpoint * vep)553 void v4l2_fwnode_endpoint_free(struct v4l2_fwnode_endpoint *vep)
554 {
555 if (IS_ERR_OR_NULL(vep))
556 return;
557
558 kfree(vep->link_frequencies);
559 vep->link_frequencies = NULL;
560 }
561 EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoint_free);
562
v4l2_fwnode_endpoint_alloc_parse(struct fwnode_handle * fwnode,struct v4l2_fwnode_endpoint * vep)563 int v4l2_fwnode_endpoint_alloc_parse(struct fwnode_handle *fwnode,
564 struct v4l2_fwnode_endpoint *vep)
565 {
566 int rval;
567
568 rval = __v4l2_fwnode_endpoint_parse(fwnode, vep);
569 if (rval < 0)
570 return rval;
571
572 rval = fwnode_property_count_u64(fwnode, "link-frequencies");
573 if (rval > 0) {
574 unsigned int i;
575
576 vep->link_frequencies =
577 kmalloc_array(rval, sizeof(*vep->link_frequencies),
578 GFP_KERNEL);
579 if (!vep->link_frequencies)
580 return -ENOMEM;
581
582 vep->nr_of_link_frequencies = rval;
583
584 rval = fwnode_property_read_u64_array(fwnode,
585 "link-frequencies",
586 vep->link_frequencies,
587 vep->nr_of_link_frequencies);
588 if (rval < 0) {
589 v4l2_fwnode_endpoint_free(vep);
590 return rval;
591 }
592
593 for (i = 0; i < vep->nr_of_link_frequencies; i++)
594 pr_debug("link-frequencies %u value %llu\n", i,
595 vep->link_frequencies[i]);
596 }
597
598 pr_debug("===== end parsing endpoint %pfw\n", fwnode);
599
600 return 0;
601 }
602 EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoint_alloc_parse);
603
v4l2_fwnode_parse_link(struct fwnode_handle * fwnode,struct v4l2_fwnode_link * link)604 int v4l2_fwnode_parse_link(struct fwnode_handle *fwnode,
605 struct v4l2_fwnode_link *link)
606 {
607 struct fwnode_endpoint fwep;
608
609 memset(link, 0, sizeof(*link));
610
611 fwnode_graph_parse_endpoint(fwnode, &fwep);
612 link->local_id = fwep.id;
613 link->local_port = fwep.port;
614 link->local_node = fwnode_graph_get_port_parent(fwnode);
615 if (!link->local_node)
616 return -ENOLINK;
617
618 fwnode = fwnode_graph_get_remote_endpoint(fwnode);
619 if (!fwnode)
620 goto err_put_local_node;
621
622 fwnode_graph_parse_endpoint(fwnode, &fwep);
623 link->remote_id = fwep.id;
624 link->remote_port = fwep.port;
625 link->remote_node = fwnode_graph_get_port_parent(fwnode);
626 if (!link->remote_node)
627 goto err_put_remote_endpoint;
628
629 return 0;
630
631 err_put_remote_endpoint:
632 fwnode_handle_put(fwnode);
633
634 err_put_local_node:
635 fwnode_handle_put(link->local_node);
636
637 return -ENOLINK;
638 }
639 EXPORT_SYMBOL_GPL(v4l2_fwnode_parse_link);
640
v4l2_fwnode_put_link(struct v4l2_fwnode_link * link)641 void v4l2_fwnode_put_link(struct v4l2_fwnode_link *link)
642 {
643 fwnode_handle_put(link->local_node);
644 fwnode_handle_put(link->remote_node);
645 }
646 EXPORT_SYMBOL_GPL(v4l2_fwnode_put_link);
647
648 static const struct v4l2_fwnode_connector_conv {
649 enum v4l2_connector_type type;
650 const char *compatible;
651 } connectors[] = {
652 {
653 .type = V4L2_CONN_COMPOSITE,
654 .compatible = "composite-video-connector",
655 }, {
656 .type = V4L2_CONN_SVIDEO,
657 .compatible = "svideo-connector",
658 },
659 };
660
661 static enum v4l2_connector_type
v4l2_fwnode_string_to_connector_type(const char * con_str)662 v4l2_fwnode_string_to_connector_type(const char *con_str)
663 {
664 unsigned int i;
665
666 for (i = 0; i < ARRAY_SIZE(connectors); i++)
667 if (!strcmp(con_str, connectors[i].compatible))
668 return connectors[i].type;
669
670 return V4L2_CONN_UNKNOWN;
671 }
672
673 static void
v4l2_fwnode_connector_parse_analog(struct fwnode_handle * fwnode,struct v4l2_fwnode_connector * vc)674 v4l2_fwnode_connector_parse_analog(struct fwnode_handle *fwnode,
675 struct v4l2_fwnode_connector *vc)
676 {
677 u32 stds;
678 int ret;
679
680 ret = fwnode_property_read_u32(fwnode, "sdtv-standards", &stds);
681
682 /* The property is optional. */
683 vc->connector.analog.sdtv_stds = ret ? V4L2_STD_ALL : stds;
684 }
685
v4l2_fwnode_connector_free(struct v4l2_fwnode_connector * connector)686 void v4l2_fwnode_connector_free(struct v4l2_fwnode_connector *connector)
687 {
688 struct v4l2_connector_link *link, *tmp;
689
690 if (IS_ERR_OR_NULL(connector) || connector->type == V4L2_CONN_UNKNOWN)
691 return;
692
693 list_for_each_entry_safe(link, tmp, &connector->links, head) {
694 v4l2_fwnode_put_link(&link->fwnode_link);
695 list_del(&link->head);
696 kfree(link);
697 }
698
699 kfree(connector->label);
700 connector->label = NULL;
701 connector->type = V4L2_CONN_UNKNOWN;
702 }
703 EXPORT_SYMBOL_GPL(v4l2_fwnode_connector_free);
704
705 static enum v4l2_connector_type
v4l2_fwnode_get_connector_type(struct fwnode_handle * fwnode)706 v4l2_fwnode_get_connector_type(struct fwnode_handle *fwnode)
707 {
708 const char *type_name;
709 int err;
710
711 if (!fwnode)
712 return V4L2_CONN_UNKNOWN;
713
714 /* The connector-type is stored within the compatible string. */
715 err = fwnode_property_read_string(fwnode, "compatible", &type_name);
716 if (err)
717 return V4L2_CONN_UNKNOWN;
718
719 return v4l2_fwnode_string_to_connector_type(type_name);
720 }
721
v4l2_fwnode_connector_parse(struct fwnode_handle * fwnode,struct v4l2_fwnode_connector * connector)722 int v4l2_fwnode_connector_parse(struct fwnode_handle *fwnode,
723 struct v4l2_fwnode_connector *connector)
724 {
725 struct fwnode_handle *connector_node;
726 enum v4l2_connector_type connector_type;
727 const char *label;
728 int err;
729
730 if (!fwnode)
731 return -EINVAL;
732
733 memset(connector, 0, sizeof(*connector));
734
735 INIT_LIST_HEAD(&connector->links);
736
737 connector_node = fwnode_graph_get_port_parent(fwnode);
738 connector_type = v4l2_fwnode_get_connector_type(connector_node);
739 if (connector_type == V4L2_CONN_UNKNOWN) {
740 fwnode_handle_put(connector_node);
741 connector_node = fwnode_graph_get_remote_port_parent(fwnode);
742 connector_type = v4l2_fwnode_get_connector_type(connector_node);
743 }
744
745 if (connector_type == V4L2_CONN_UNKNOWN) {
746 pr_err("Unknown connector type\n");
747 err = -ENOTCONN;
748 goto out;
749 }
750
751 connector->type = connector_type;
752 connector->name = fwnode_get_name(connector_node);
753 err = fwnode_property_read_string(connector_node, "label", &label);
754 connector->label = err ? NULL : kstrdup_const(label, GFP_KERNEL);
755
756 /* Parse the connector specific properties. */
757 switch (connector->type) {
758 case V4L2_CONN_COMPOSITE:
759 case V4L2_CONN_SVIDEO:
760 v4l2_fwnode_connector_parse_analog(connector_node, connector);
761 break;
762 /* Avoid compiler warnings */
763 case V4L2_CONN_UNKNOWN:
764 break;
765 }
766
767 out:
768 fwnode_handle_put(connector_node);
769
770 return err;
771 }
772 EXPORT_SYMBOL_GPL(v4l2_fwnode_connector_parse);
773
v4l2_fwnode_connector_add_link(struct fwnode_handle * fwnode,struct v4l2_fwnode_connector * connector)774 int v4l2_fwnode_connector_add_link(struct fwnode_handle *fwnode,
775 struct v4l2_fwnode_connector *connector)
776 {
777 struct fwnode_handle *connector_ep;
778 struct v4l2_connector_link *link;
779 int err;
780
781 if (!fwnode || !connector || connector->type == V4L2_CONN_UNKNOWN)
782 return -EINVAL;
783
784 connector_ep = fwnode_graph_get_remote_endpoint(fwnode);
785 if (!connector_ep)
786 return -ENOTCONN;
787
788 link = kzalloc_obj(*link);
789 if (!link) {
790 err = -ENOMEM;
791 goto err;
792 }
793
794 err = v4l2_fwnode_parse_link(connector_ep, &link->fwnode_link);
795 if (err)
796 goto err;
797
798 fwnode_handle_put(connector_ep);
799
800 list_add(&link->head, &connector->links);
801 connector->nr_of_links++;
802
803 return 0;
804
805 err:
806 kfree(link);
807 fwnode_handle_put(connector_ep);
808
809 return err;
810 }
811 EXPORT_SYMBOL_GPL(v4l2_fwnode_connector_add_link);
812
v4l2_fwnode_device_parse(struct device * dev,struct v4l2_fwnode_device_properties * props)813 int v4l2_fwnode_device_parse(struct device *dev,
814 struct v4l2_fwnode_device_properties *props)
815 {
816 struct fwnode_handle *fwnode = dev_fwnode(dev);
817 u32 val;
818 int ret;
819
820 memset(props, 0, sizeof(*props));
821
822 props->orientation = V4L2_FWNODE_PROPERTY_UNSET;
823 ret = fwnode_property_read_u32(fwnode, "orientation", &val);
824 if (!ret) {
825 switch (val) {
826 case V4L2_FWNODE_ORIENTATION_FRONT:
827 case V4L2_FWNODE_ORIENTATION_BACK:
828 case V4L2_FWNODE_ORIENTATION_EXTERNAL:
829 break;
830 default:
831 dev_warn(dev, "Unsupported device orientation: %u\n", val);
832 return -EINVAL;
833 }
834
835 props->orientation = val;
836 dev_dbg(dev, "device orientation: %u\n", val);
837 }
838
839 props->rotation = V4L2_FWNODE_PROPERTY_UNSET;
840 ret = fwnode_property_read_u32(fwnode, "rotation", &val);
841 if (!ret) {
842 if (val >= 360) {
843 dev_warn(dev, "Unsupported device rotation: %u\n", val);
844 return -EINVAL;
845 }
846
847 props->rotation = val;
848 dev_dbg(dev, "device rotation: %u\n", val);
849 }
850
851 return 0;
852 }
853 EXPORT_SYMBOL_GPL(v4l2_fwnode_device_parse);
854
855 /*
856 * v4l2_fwnode_reference_parse - parse references for async sub-devices
857 * @dev: the device node the properties of which are parsed for references
858 * @notifier: the async notifier where the async subdevs will be added
859 * @prop: the name of the property
860 *
861 * Return: 0 on success
862 * -ENOENT if no entries were found
863 * -ENOMEM if memory allocation failed
864 * -EINVAL if property parsing failed
865 */
v4l2_fwnode_reference_parse(struct device * dev,struct v4l2_async_notifier * notifier,const char * prop)866 static int v4l2_fwnode_reference_parse(struct device *dev,
867 struct v4l2_async_notifier *notifier,
868 const char *prop)
869 {
870 struct fwnode_reference_args args;
871 unsigned int index;
872 int ret;
873
874 for (index = 0;
875 !(ret = fwnode_property_get_reference_args(dev_fwnode(dev), prop,
876 NULL, 0, index, &args));
877 index++) {
878 struct v4l2_async_connection *asd;
879
880 asd = v4l2_async_nf_add_fwnode(notifier, args.fwnode,
881 struct v4l2_async_connection);
882 fwnode_handle_put(args.fwnode);
883 if (IS_ERR(asd)) {
884 /* not an error if asd already exists */
885 if (PTR_ERR(asd) == -EEXIST)
886 continue;
887
888 return PTR_ERR(asd);
889 }
890 }
891
892 /* -ENOENT here means successful parsing */
893 if (ret != -ENOENT)
894 return ret;
895
896 /* Return -ENOENT if no references were found */
897 return index ? 0 : -ENOENT;
898 }
899
900 /*
901 * v4l2_fwnode_reference_get_int_prop - parse a reference with integer
902 * arguments
903 * @fwnode: fwnode to read @prop from
904 * @notifier: notifier for @dev
905 * @prop: the name of the property
906 * @index: the index of the reference to get
907 * @props: the array of integer property names
908 * @nprops: the number of integer property names in @nprops
909 *
910 * First find an fwnode referred to by the reference at @index in @prop.
911 *
912 * Then under that fwnode, @nprops times, for each property in @props,
913 * iteratively follow child nodes starting from fwnode such that they have the
914 * property in @props array at the index of the child node distance from the
915 * root node and the value of that property matching with the integer argument
916 * of the reference, at the same index.
917 *
918 * The child fwnode reached at the end of the iteration is then returned to the
919 * caller.
920 *
921 * The core reason for this is that you cannot refer to just any node in ACPI.
922 * So to refer to an endpoint (easy in DT) you need to refer to a device, then
923 * provide a list of (property name, property value) tuples where each tuple
924 * uniquely identifies a child node. The first tuple identifies a child directly
925 * underneath the device fwnode, the next tuple identifies a child node
926 * underneath the fwnode identified by the previous tuple, etc. until you
927 * reached the fwnode you need.
928 *
929 * THIS EXAMPLE EXISTS MERELY TO DOCUMENT THIS FUNCTION. DO NOT USE IT AS A
930 * REFERENCE IN HOW ACPI TABLES SHOULD BE WRITTEN!! See documentation under
931 * Documentation/firmware-guide/acpi/dsd/ instead and especially graph.txt,
932 * data-node-references.txt and leds.txt .
933 *
934 * Scope (\_SB.PCI0.I2C2)
935 * {
936 * Device (CAM0)
937 * {
938 * Name (_DSD, Package () {
939 * ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
940 * Package () {
941 * Package () {
942 * "compatible",
943 * Package () { "nokia,smia" }
944 * },
945 * },
946 * ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
947 * Package () {
948 * Package () { "port0", "PRT0" },
949 * }
950 * })
951 * Name (PRT0, Package() {
952 * ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
953 * Package () {
954 * Package () { "port", 0 },
955 * },
956 * ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
957 * Package () {
958 * Package () { "endpoint0", "EP00" },
959 * }
960 * })
961 * Name (EP00, Package() {
962 * ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
963 * Package () {
964 * Package () { "endpoint", 0 },
965 * Package () {
966 * "remote-endpoint",
967 * Package() {
968 * \_SB.PCI0.ISP, 4, 0
969 * }
970 * },
971 * }
972 * })
973 * }
974 * }
975 *
976 * Scope (\_SB.PCI0)
977 * {
978 * Device (ISP)
979 * {
980 * Name (_DSD, Package () {
981 * ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
982 * Package () {
983 * Package () { "port4", "PRT4" },
984 * }
985 * })
986 *
987 * Name (PRT4, Package() {
988 * ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
989 * Package () {
990 * Package () { "port", 4 },
991 * },
992 * ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
993 * Package () {
994 * Package () { "endpoint0", "EP40" },
995 * }
996 * })
997 *
998 * Name (EP40, Package() {
999 * ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
1000 * Package () {
1001 * Package () { "endpoint", 0 },
1002 * Package () {
1003 * "remote-endpoint",
1004 * Package () {
1005 * \_SB.PCI0.I2C2.CAM0,
1006 * 0, 0
1007 * }
1008 * },
1009 * }
1010 * })
1011 * }
1012 * }
1013 *
1014 * From the EP40 node under ISP device, you could parse the graph remote
1015 * endpoint using v4l2_fwnode_reference_get_int_prop with these arguments:
1016 *
1017 * @fwnode: fwnode referring to EP40 under ISP.
1018 * @prop: "remote-endpoint"
1019 * @index: 0
1020 * @props: "port", "endpoint"
1021 * @nprops: 2
1022 *
1023 * And you'd get back fwnode referring to EP00 under CAM0.
1024 *
1025 * The same works the other way around: if you use EP00 under CAM0 as the
1026 * fwnode, you'll get fwnode referring to EP40 under ISP.
1027 *
1028 * The same example in DT syntax would look like this:
1029 *
1030 * cam: cam0 {
1031 * compatible = "nokia,smia";
1032 *
1033 * port {
1034 * port = <0>;
1035 * endpoint {
1036 * endpoint = <0>;
1037 * remote-endpoint = <&isp 4 0>;
1038 * };
1039 * };
1040 * };
1041 *
1042 * isp: isp {
1043 * ports {
1044 * port@4 {
1045 * port = <4>;
1046 * endpoint {
1047 * endpoint = <0>;
1048 * remote-endpoint = <&cam 0 0>;
1049 * };
1050 * };
1051 * };
1052 * };
1053 *
1054 * Return: 0 on success
1055 * -ENOENT if no entries (or the property itself) were found
1056 * -EINVAL if property parsing otherwise failed
1057 * -ENOMEM if memory allocation failed
1058 */
1059 static struct fwnode_handle *
v4l2_fwnode_reference_get_int_prop(struct fwnode_handle * fwnode,const char * prop,unsigned int index,const char * const * props,unsigned int nprops)1060 v4l2_fwnode_reference_get_int_prop(struct fwnode_handle *fwnode,
1061 const char *prop,
1062 unsigned int index,
1063 const char * const *props,
1064 unsigned int nprops)
1065 {
1066 struct fwnode_reference_args fwnode_args;
1067 u64 *args = fwnode_args.args;
1068 struct fwnode_handle *child;
1069 int ret;
1070
1071 /*
1072 * Obtain remote fwnode as well as the integer arguments.
1073 *
1074 * Note that right now both -ENODATA and -ENOENT may signal
1075 * out-of-bounds access. Return -ENOENT in that case.
1076 */
1077 ret = fwnode_property_get_reference_args(fwnode, prop, NULL, nprops,
1078 index, &fwnode_args);
1079 if (ret)
1080 return ERR_PTR(ret == -ENODATA ? -ENOENT : ret);
1081
1082 /*
1083 * Find a node in the tree under the referred fwnode corresponding to
1084 * the integer arguments.
1085 */
1086 fwnode = fwnode_args.fwnode;
1087 while (nprops--) {
1088 u32 val;
1089
1090 /* Loop over all child nodes under fwnode. */
1091 fwnode_for_each_child_node(fwnode, child) {
1092 if (fwnode_property_read_u32(child, *props, &val))
1093 continue;
1094
1095 /* Found property, see if its value matches. */
1096 if (val == *args)
1097 break;
1098 }
1099
1100 fwnode_handle_put(fwnode);
1101
1102 /* No property found; return an error here. */
1103 if (!child) {
1104 fwnode = ERR_PTR(-ENOENT);
1105 break;
1106 }
1107
1108 props++;
1109 args++;
1110 fwnode = child;
1111 }
1112
1113 return fwnode;
1114 }
1115
1116 struct v4l2_fwnode_int_props {
1117 const char *name;
1118 const char * const *props;
1119 unsigned int nprops;
1120 };
1121
1122 /*
1123 * v4l2_fwnode_reference_parse_int_props - parse references for async
1124 * sub-devices
1125 * @dev: struct device pointer
1126 * @notifier: notifier for @dev
1127 * @prop: the name of the property
1128 * @props: the array of integer property names
1129 * @nprops: the number of integer properties
1130 *
1131 * Use v4l2_fwnode_reference_get_int_prop to find fwnodes through reference in
1132 * property @prop with integer arguments with child nodes matching in properties
1133 * @props. Then, set up V4L2 async sub-devices for those fwnodes in the notifier
1134 * accordingly.
1135 *
1136 * While it is technically possible to use this function on DT, it is only
1137 * meaningful on ACPI. On Device tree you can refer to any node in the tree but
1138 * on ACPI the references are limited to devices.
1139 *
1140 * Return: 0 on success
1141 * -ENOENT if no entries (or the property itself) were found
1142 * -EINVAL if property parsing otherwisefailed
1143 * -ENOMEM if memory allocation failed
1144 */
1145 static int
v4l2_fwnode_reference_parse_int_props(struct device * dev,struct v4l2_async_notifier * notifier,const struct v4l2_fwnode_int_props * p)1146 v4l2_fwnode_reference_parse_int_props(struct device *dev,
1147 struct v4l2_async_notifier *notifier,
1148 const struct v4l2_fwnode_int_props *p)
1149 {
1150 struct fwnode_handle *fwnode;
1151 unsigned int index;
1152 int ret;
1153 const char *prop = p->name;
1154 const char * const *props = p->props;
1155 unsigned int nprops = p->nprops;
1156
1157 index = 0;
1158 do {
1159 fwnode = v4l2_fwnode_reference_get_int_prop(dev_fwnode(dev),
1160 prop, index,
1161 props, nprops);
1162 if (IS_ERR(fwnode)) {
1163 /*
1164 * Note that right now both -ENODATA and -ENOENT may
1165 * signal out-of-bounds access. Return the error in
1166 * cases other than that.
1167 */
1168 if (PTR_ERR(fwnode) != -ENOENT &&
1169 PTR_ERR(fwnode) != -ENODATA)
1170 return PTR_ERR(fwnode);
1171 break;
1172 }
1173 fwnode_handle_put(fwnode);
1174 index++;
1175 } while (1);
1176
1177 for (index = 0;
1178 !IS_ERR((fwnode = v4l2_fwnode_reference_get_int_prop(dev_fwnode(dev),
1179 prop, index,
1180 props,
1181 nprops)));
1182 index++) {
1183 struct v4l2_async_connection *asd;
1184
1185 asd = v4l2_async_nf_add_fwnode(notifier, fwnode,
1186 struct v4l2_async_connection);
1187 fwnode_handle_put(fwnode);
1188 if (IS_ERR(asd)) {
1189 ret = PTR_ERR(asd);
1190 /* not an error if asd already exists */
1191 if (ret == -EEXIST)
1192 continue;
1193
1194 return PTR_ERR(asd);
1195 }
1196 }
1197
1198 return !fwnode || PTR_ERR(fwnode) == -ENOENT ? 0 : PTR_ERR(fwnode);
1199 }
1200
1201 /**
1202 * v4l2_async_nf_parse_fwnode_sensor - parse common references on
1203 * sensors for async sub-devices
1204 * @dev: the device node the properties of which are parsed for references
1205 * @notifier: the async notifier where the async subdevs will be added
1206 *
1207 * Parse common sensor properties for remote devices related to the
1208 * sensor and set up async sub-devices for them.
1209 *
1210 * Any notifier populated using this function must be released with a call to
1211 * v4l2_async_nf_release() after it has been unregistered and the async
1212 * sub-devices are no longer in use, even in the case the function returned an
1213 * error.
1214 *
1215 * Return: 0 on success
1216 * -ENOMEM if memory allocation failed
1217 * -EINVAL if property parsing failed
1218 */
1219 static int
v4l2_async_nf_parse_fwnode_sensor(struct device * dev,struct v4l2_async_notifier * notifier)1220 v4l2_async_nf_parse_fwnode_sensor(struct device *dev,
1221 struct v4l2_async_notifier *notifier)
1222 {
1223 static const char * const led_props[] = { "led" };
1224 static const struct v4l2_fwnode_int_props props[] = {
1225 { "flash-leds", led_props, ARRAY_SIZE(led_props) },
1226 { "mipi-img-flash-leds", },
1227 { "lens-focus", },
1228 { "mipi-img-lens-focus", },
1229 };
1230 unsigned int i;
1231
1232 for (i = 0; i < ARRAY_SIZE(props); i++) {
1233 int ret;
1234
1235 if (props[i].props && is_acpi_node(dev_fwnode(dev)))
1236 ret = v4l2_fwnode_reference_parse_int_props(dev,
1237 notifier,
1238 &props[i]);
1239 else
1240 ret = v4l2_fwnode_reference_parse(dev, notifier,
1241 props[i].name);
1242 if (ret && ret != -ENOENT) {
1243 dev_warn(dev, "parsing property \"%s\" failed (%d)\n",
1244 props[i].name, ret);
1245 return ret;
1246 }
1247 }
1248
1249 return 0;
1250 }
1251
v4l2_async_register_subdev_sensor(struct v4l2_subdev * sd)1252 int v4l2_async_register_subdev_sensor(struct v4l2_subdev *sd)
1253 {
1254 struct v4l2_async_notifier *notifier;
1255 int ret;
1256
1257 if (WARN_ON(!sd->dev))
1258 return -ENODEV;
1259
1260 notifier = kzalloc_obj(*notifier);
1261 if (!notifier)
1262 return -ENOMEM;
1263
1264 v4l2_async_subdev_nf_init(notifier, sd);
1265
1266 ret = v4l2_subdev_get_privacy_led(sd);
1267 if (ret < 0)
1268 goto out_cleanup;
1269
1270 ret = v4l2_async_nf_parse_fwnode_sensor(sd->dev, notifier);
1271 if (ret < 0)
1272 goto out_cleanup;
1273
1274 ret = v4l2_async_nf_register(notifier);
1275 if (ret < 0)
1276 goto out_cleanup;
1277
1278 ret = v4l2_async_register_subdev(sd);
1279 if (ret < 0)
1280 goto out_unregister;
1281
1282 sd->subdev_notifier = notifier;
1283
1284 return 0;
1285
1286 out_unregister:
1287 v4l2_async_nf_unregister(notifier);
1288
1289 out_cleanup:
1290 v4l2_subdev_put_privacy_led(sd);
1291 v4l2_async_nf_cleanup(notifier);
1292 kfree(notifier);
1293
1294 return ret;
1295 }
1296 EXPORT_SYMBOL_GPL(v4l2_async_register_subdev_sensor);
1297
1298 MODULE_DESCRIPTION("V4L2 fwnode binding parsing library");
1299 MODULE_LICENSE("GPL");
1300 MODULE_AUTHOR("Sakari Ailus <sakari.ailus@linux.intel.com>");
1301 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
1302 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1303