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