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Merge tag 'docs-6.4-2' of git://git.lwn.net/linux
[linux-block.git] / drivers / media / v4l2-core / v4l2-ctrls-core.c
CommitLineData
71c689dc
HV		 1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * V4L2 controls framework core implementation.
4 *
5 * Copyright (C) 2010-2021 Hans Verkuil <hverkuil-cisco@xs4all.nl>
6 */
7
8#include <linux/export.h>
9#include <linux/mm.h>
10#include <linux/slab.h>
11#include <media/v4l2-ctrls.h>
12#include <media/v4l2-event.h>
13#include <media/v4l2-fwnode.h>
14
15#include "v4l2-ctrls-priv.h"
16
17static const union v4l2_ctrl_ptr ptr_null;
18
19static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl,
20 u32 changes)
21{
22 memset(ev, 0, sizeof(*ev));
23 ev->type = V4L2_EVENT_CTRL;
24 ev->id = ctrl->id;
25 ev->u.ctrl.changes = changes;
26 ev->u.ctrl.type = ctrl->type;
27 ev->u.ctrl.flags = user_flags(ctrl);
28 if (ctrl->is_ptr)
29 ev->u.ctrl.value64 = 0;
30 else
31 ev->u.ctrl.value64 = *ctrl->p_cur.p_s64;
32 ev->u.ctrl.minimum = ctrl->minimum;
33 ev->u.ctrl.maximum = ctrl->maximum;
34 if (ctrl->type == V4L2_CTRL_TYPE_MENU
35 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
36 ev->u.ctrl.step = 1;
37 else
38 ev->u.ctrl.step = ctrl->step;
39 ev->u.ctrl.default_value = ctrl->default_value;
40}
41
42void send_initial_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl)
43{
44 struct v4l2_event ev;
45 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
46
47 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
48 changes |= V4L2_EVENT_CTRL_CH_VALUE;
49 fill_event(&ev, ctrl, changes);
50 v4l2_event_queue_fh(fh, &ev);
51}
52
53void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
54{
55 struct v4l2_event ev;
56 struct v4l2_subscribed_event *sev;
57
58 if (list_empty(&ctrl->ev_subs))
59 return;
60 fill_event(&ev, ctrl, changes);
61
62 list_for_each_entry(sev, &ctrl->ev_subs, node)
63 if (sev->fh != fh ||
64 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
65 v4l2_event_queue_fh(sev->fh, &ev);
66}
67
cd75981e 68bool v4l2_ctrl_type_op_equal(const struct v4l2_ctrl *ctrl,
f1739ec4 69 union v4l2_ctrl_ptr ptr1, union v4l2_ctrl_ptr ptr2)
71c689dc 70{
6b1aaa68
HV		 71 unsigned int i;
72
71c689dc
HV		 73 switch (ctrl->type) {
74 case V4L2_CTRL_TYPE_BUTTON:
75 return false;
76 case V4L2_CTRL_TYPE_STRING:
cd75981e 77 for (i = 0; i < ctrl->elems; i++) {
6b1aaa68
HV		 78 unsigned int idx = i * ctrl->elem_size;
79
80 /* strings are always 0-terminated */
81 if (strcmp(ptr1.p_char + idx, ptr2.p_char + idx))
82 return false;
83 }
84 return true;
71c689dc 85 default:
6b1aaa68 86 return !memcmp(ptr1.p_const, ptr2.p_const,
cd75981e 87 ctrl->elems * ctrl->elem_size);
71c689dc
HV		 88 }
89}
f1739ec4 90EXPORT_SYMBOL(v4l2_ctrl_type_op_equal);
71c689dc
HV		 91
92/* Default intra MPEG-2 quantisation coefficients, from the specification. */
93static const u8 mpeg2_intra_quant_matrix[64] = {
94 8, 16, 16, 19, 16, 19, 22, 22,
95 22, 22, 22, 22, 26, 24, 26, 27,
96 27, 27, 26, 26, 26, 26, 27, 27,
97 27, 29, 29, 29, 34, 34, 34, 29,
98 29, 29, 27, 27, 29, 29, 32, 32,
99 34, 34, 37, 38, 37, 35, 35, 34,
100 35, 38, 38, 40, 40, 40, 48, 48,
101 46, 46, 56, 56, 58, 69, 69, 83
102};
103
104static void std_init_compound(const struct v4l2_ctrl *ctrl, u32 idx,
105 union v4l2_ctrl_ptr ptr)
106{
107 struct v4l2_ctrl_mpeg2_sequence *p_mpeg2_sequence;
108 struct v4l2_ctrl_mpeg2_picture *p_mpeg2_picture;
109 struct v4l2_ctrl_mpeg2_quantisation *p_mpeg2_quant;
110 struct v4l2_ctrl_vp8_frame *p_vp8_frame;
f15799b7 111 struct v4l2_ctrl_vp9_frame *p_vp9_frame;
71c689dc 112 struct v4l2_ctrl_fwht_params *p_fwht_params;
0f6146d4 113 struct v4l2_ctrl_h264_scaling_matrix *p_h264_scaling_matrix;
71c689dc
HV		 114 void *p = ptr.p + idx * ctrl->elem_size;
115
116 if (ctrl->p_def.p_const)
117 memcpy(p, ctrl->p_def.p_const, ctrl->elem_size);
118 else
119 memset(p, 0, ctrl->elem_size);
120
121 switch ((u32)ctrl->type) {
122 case V4L2_CTRL_TYPE_MPEG2_SEQUENCE:
123 p_mpeg2_sequence = p;
124
125 /* 4:2:0 */
126 p_mpeg2_sequence->chroma_format = 1;
127 break;
128 case V4L2_CTRL_TYPE_MPEG2_PICTURE:
129 p_mpeg2_picture = p;
130
131 /* interlaced top field */
132 p_mpeg2_picture->picture_structure = V4L2_MPEG2_PIC_TOP_FIELD;
133 p_mpeg2_picture->picture_coding_type =
134 V4L2_MPEG2_PIC_CODING_TYPE_I;
135 break;
136 case V4L2_CTRL_TYPE_MPEG2_QUANTISATION:
137 p_mpeg2_quant = p;
138
139 memcpy(p_mpeg2_quant->intra_quantiser_matrix,
140 mpeg2_intra_quant_matrix,
141 ARRAY_SIZE(mpeg2_intra_quant_matrix));
142 /*
143 * The default non-intra MPEG-2 quantisation
144 * coefficients are all 16, as per the specification.
145 */
146 memset(p_mpeg2_quant->non_intra_quantiser_matrix, 16,
147 sizeof(p_mpeg2_quant->non_intra_quantiser_matrix));
148 break;
149 case V4L2_CTRL_TYPE_VP8_FRAME:
150 p_vp8_frame = p;
151 p_vp8_frame->num_dct_parts = 1;
152 break;
f15799b7
YD		 153 case V4L2_CTRL_TYPE_VP9_FRAME:
154 p_vp9_frame = p;
155 p_vp9_frame->profile = 0;
156 p_vp9_frame->bit_depth = 8;
157 p_vp9_frame->flags |= V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING |
158 V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING;
159 break;
71c689dc
HV		 160 case V4L2_CTRL_TYPE_FWHT_PARAMS:
161 p_fwht_params = p;
162 p_fwht_params->version = V4L2_FWHT_VERSION;
163 p_fwht_params->width = 1280;
164 p_fwht_params->height = 720;
165 p_fwht_params->flags = V4L2_FWHT_FL_PIXENC_YUV |
166 (2 << V4L2_FWHT_FL_COMPONENTS_NUM_OFFSET);
167 break;
0f6146d4
ND		 168 case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
169 p_h264_scaling_matrix = p;
170 /*
171 * The default (flat) H.264 scaling matrix when none are
172 * specified in the bitstream, this is according to formulas
173 * (7-8) and (7-9) of the specification.
174 */
175 memset(p_h264_scaling_matrix, 16, sizeof(*p_h264_scaling_matrix));
176 break;
71c689dc
HV		 177 }
178}
179
f1739ec4 180void v4l2_ctrl_type_op_init(const struct v4l2_ctrl *ctrl, u32 from_idx,
cd75981e 181 union v4l2_ctrl_ptr ptr)
71c689dc 182{
6b1aaa68 183 unsigned int i;
cd75981e 184 u32 tot_elems = ctrl->elems;
6b1aaa68
HV		 185 u32 elems = tot_elems - from_idx;
186
187 if (from_idx >= tot_elems)
188 return;
189
71c689dc
HV		 190 switch (ctrl->type) {
191 case V4L2_CTRL_TYPE_STRING:
6b1aaa68
HV		 192 for (i = from_idx; i < tot_elems; i++) {
193 unsigned int offset = i * ctrl->elem_size;
194
195 memset(ptr.p_char + offset, ' ', ctrl->minimum);
196 ptr.p_char[offset + ctrl->minimum] = '\0';
197 }
71c689dc
HV		 198 break;
199 case V4L2_CTRL_TYPE_INTEGER64:
6b1aaa68
HV		 200 if (ctrl->default_value) {
201 for (i = from_idx; i < tot_elems; i++)
202 ptr.p_s64[i] = ctrl->default_value;
203 } else {
204 memset(ptr.p_s64 + from_idx, 0, elems * sizeof(s64));
205 }
71c689dc
HV		 206 break;
207 case V4L2_CTRL_TYPE_INTEGER:
208 case V4L2_CTRL_TYPE_INTEGER_MENU:
209 case V4L2_CTRL_TYPE_MENU:
210 case V4L2_CTRL_TYPE_BITMASK:
211 case V4L2_CTRL_TYPE_BOOLEAN:
6b1aaa68
HV		 212 if (ctrl->default_value) {
213 for (i = from_idx; i < tot_elems; i++)
214 ptr.p_s32[i] = ctrl->default_value;
215 } else {
216 memset(ptr.p_s32 + from_idx, 0, elems * sizeof(s32));
217 }
71c689dc
HV		 218 break;
219 case V4L2_CTRL_TYPE_BUTTON:
220 case V4L2_CTRL_TYPE_CTRL_CLASS:
6b1aaa68 221 memset(ptr.p_s32 + from_idx, 0, elems * sizeof(s32));
71c689dc
HV		 222 break;
223 case V4L2_CTRL_TYPE_U8:
6b1aaa68 224 memset(ptr.p_u8 + from_idx, ctrl->default_value, elems);
71c689dc
HV		 225 break;
226 case V4L2_CTRL_TYPE_U16:
6b1aaa68
HV		 227 if (ctrl->default_value) {
228 for (i = from_idx; i < tot_elems; i++)
229 ptr.p_u16[i] = ctrl->default_value;
230 } else {
231 memset(ptr.p_u16 + from_idx, 0, elems * sizeof(u16));
232 }
71c689dc
HV		 233 break;
234 case V4L2_CTRL_TYPE_U32:
6b1aaa68
HV		 235 if (ctrl->default_value) {
236 for (i = from_idx; i < tot_elems; i++)
237 ptr.p_u32[i] = ctrl->default_value;
238 } else {
239 memset(ptr.p_u32 + from_idx, 0, elems * sizeof(u32));
240 }
71c689dc
HV		 241 break;
242 default:
6b1aaa68
HV		 243 for (i = from_idx; i < tot_elems; i++)
244 std_init_compound(ctrl, i, ptr);
71c689dc
HV		 245 break;
246 }
247}
f1739ec4 248EXPORT_SYMBOL(v4l2_ctrl_type_op_init);
71c689dc 249
f1739ec4 250void v4l2_ctrl_type_op_log(const struct v4l2_ctrl *ctrl)
71c689dc
HV		 251{
252 union v4l2_ctrl_ptr ptr = ctrl->p_cur;
253
254 if (ctrl->is_array) {
255 unsigned i;
256
257 for (i = 0; i < ctrl->nr_of_dims; i++)
258 pr_cont("[%u]", ctrl->dims[i]);
259 pr_cont(" ");
260 }
261
262 switch (ctrl->type) {
263 case V4L2_CTRL_TYPE_INTEGER:
264 pr_cont("%d", *ptr.p_s32);
265 break;
266 case V4L2_CTRL_TYPE_BOOLEAN:
267 pr_cont("%s", *ptr.p_s32 ? "true" : "false");
268 break;
269 case V4L2_CTRL_TYPE_MENU:
270 pr_cont("%s", ctrl->qmenu[*ptr.p_s32]);
271 break;
272 case V4L2_CTRL_TYPE_INTEGER_MENU:
273 pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]);
274 break;
275 case V4L2_CTRL_TYPE_BITMASK:
276 pr_cont("0x%08x", *ptr.p_s32);
277 break;
278 case V4L2_CTRL_TYPE_INTEGER64:
279 pr_cont("%lld", *ptr.p_s64);
280 break;
281 case V4L2_CTRL_TYPE_STRING:
282 pr_cont("%s", ptr.p_char);
283 break;
284 case V4L2_CTRL_TYPE_U8:
285 pr_cont("%u", (unsigned)*ptr.p_u8);
286 break;
287 case V4L2_CTRL_TYPE_U16:
288 pr_cont("%u", (unsigned)*ptr.p_u16);
289 break;
290 case V4L2_CTRL_TYPE_U32:
291 pr_cont("%u", (unsigned)*ptr.p_u32);
292 break;
293 case V4L2_CTRL_TYPE_H264_SPS:
294 pr_cont("H264_SPS");
295 break;
296 case V4L2_CTRL_TYPE_H264_PPS:
297 pr_cont("H264_PPS");
298 break;
299 case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
300 pr_cont("H264_SCALING_MATRIX");
301 break;
302 case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
303 pr_cont("H264_SLICE_PARAMS");
304 break;
305 case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
306 pr_cont("H264_DECODE_PARAMS");
307 break;
308 case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS:
309 pr_cont("H264_PRED_WEIGHTS");
310 break;
311 case V4L2_CTRL_TYPE_FWHT_PARAMS:
312 pr_cont("FWHT_PARAMS");
313 break;
314 case V4L2_CTRL_TYPE_VP8_FRAME:
315 pr_cont("VP8_FRAME");
316 break;
317 case V4L2_CTRL_TYPE_HDR10_CLL_INFO:
318 pr_cont("HDR10_CLL_INFO");
319 break;
320 case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY:
321 pr_cont("HDR10_MASTERING_DISPLAY");
322 break;
323 case V4L2_CTRL_TYPE_MPEG2_QUANTISATION:
324 pr_cont("MPEG2_QUANTISATION");
325 break;
326 case V4L2_CTRL_TYPE_MPEG2_SEQUENCE:
327 pr_cont("MPEG2_SEQUENCE");
328 break;
329 case V4L2_CTRL_TYPE_MPEG2_PICTURE:
330 pr_cont("MPEG2_PICTURE");
331 break;
b88dbe38
AP		 332 case V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR:
333 pr_cont("VP9_COMPRESSED_HDR");
334 break;
335 case V4L2_CTRL_TYPE_VP9_FRAME:
336 pr_cont("VP9_FRAME");
337 break;
0a64f5f9
BG		 338 case V4L2_CTRL_TYPE_HEVC_SPS:
339 pr_cont("HEVC_SPS");
340 break;
341 case V4L2_CTRL_TYPE_HEVC_PPS:
342 pr_cont("HEVC_PPS");
343 break;
344 case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
345 pr_cont("HEVC_SLICE_PARAMS");
346 break;
347 case V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX:
348 pr_cont("HEVC_SCALING_MATRIX");
349 break;
350 case V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS:
351 pr_cont("HEVC_DECODE_PARAMS");
352 break;
71c689dc
HV		 353 default:
354 pr_cont("unknown type %d", ctrl->type);
355 break;
356 }
357}
f1739ec4 358EXPORT_SYMBOL(v4l2_ctrl_type_op_log);
71c689dc
HV		 359
360/*
361 * Round towards the closest legal value. Be careful when we are
362 * close to the maximum range of the control type to prevent
363 * wrap-arounds.
364 */
365#define ROUND_TO_RANGE(val, offset_type, ctrl) \
366({ \
367 offset_type offset; \
368 if ((ctrl)->maximum >= 0 && \
369 val >= (ctrl)->maximum - (s32)((ctrl)->step / 2)) \
370 val = (ctrl)->maximum; \
371 else \
372 val += (s32)((ctrl)->step / 2); \
373 val = clamp_t(typeof(val), val, \
374 (ctrl)->minimum, (ctrl)->maximum); \
375 offset = (val) - (ctrl)->minimum; \
376 offset = (ctrl)->step * (offset / (u32)(ctrl)->step); \
377 val = (ctrl)->minimum + offset; \
378 0; \
379})
380
381/* Validate a new control */
382
383#define zero_padding(s) \
384 memset(&(s).padding, 0, sizeof((s).padding))
385#define zero_reserved(s) \
386 memset(&(s).reserved, 0, sizeof((s).reserved))
387
b88dbe38
AP		 388static int
389validate_vp9_lf_params(struct v4l2_vp9_loop_filter *lf)
390{
391 unsigned int i;
392
393 if (lf->flags & ~(V4L2_VP9_LOOP_FILTER_FLAG_DELTA_ENABLED |
394 V4L2_VP9_LOOP_FILTER_FLAG_DELTA_UPDATE))
395 return -EINVAL;
396
397 /* That all values are in the accepted range. */
398 if (lf->level > GENMASK(5, 0))
399 return -EINVAL;
400
401 if (lf->sharpness > GENMASK(2, 0))
402 return -EINVAL;
403
404 for (i = 0; i < ARRAY_SIZE(lf->ref_deltas); i++)
405 if (lf->ref_deltas[i] < -63 || lf->ref_deltas[i] > 63)
406 return -EINVAL;
407
408 for (i = 0; i < ARRAY_SIZE(lf->mode_deltas); i++)
409 if (lf->mode_deltas[i] < -63 || lf->mode_deltas[i] > 63)
410 return -EINVAL;
411
412 zero_reserved(*lf);
413 return 0;
414}
415
416static int
417validate_vp9_quant_params(struct v4l2_vp9_quantization *quant)
418{
419 if (quant->delta_q_y_dc < -15 || quant->delta_q_y_dc > 15 ||
420 quant->delta_q_uv_dc < -15 || quant->delta_q_uv_dc > 15 ||
421 quant->delta_q_uv_ac < -15 || quant->delta_q_uv_ac > 15)
422 return -EINVAL;
423
424 zero_reserved(*quant);
425 return 0;
426}
427
428static int
429validate_vp9_seg_params(struct v4l2_vp9_segmentation *seg)
430{
431 unsigned int i, j;
432
433 if (seg->flags & ~(V4L2_VP9_SEGMENTATION_FLAG_ENABLED |
434 V4L2_VP9_SEGMENTATION_FLAG_UPDATE_MAP |
435 V4L2_VP9_SEGMENTATION_FLAG_TEMPORAL_UPDATE |
436 V4L2_VP9_SEGMENTATION_FLAG_UPDATE_DATA |
437 V4L2_VP9_SEGMENTATION_FLAG_ABS_OR_DELTA_UPDATE))
438 return -EINVAL;
439
440 for (i = 0; i < ARRAY_SIZE(seg->feature_enabled); i++) {
441 if (seg->feature_enabled[i] &
442 ~V4L2_VP9_SEGMENT_FEATURE_ENABLED_MASK)
443 return -EINVAL;
444 }
445
446 for (i = 0; i < ARRAY_SIZE(seg->feature_data); i++) {
fc5004e5 447 static const int range[] = { 255, 63, 3, 0 };
b88dbe38
AP		 448
449 for (j = 0; j < ARRAY_SIZE(seg->feature_data[j]); j++) {
450 if (seg->feature_data[i][j] < -range[j] ||
451 seg->feature_data[i][j] > range[j])
452 return -EINVAL;
453 }
454 }
455
456 zero_reserved(*seg);
457 return 0;
458}
459
460static int
461validate_vp9_compressed_hdr(struct v4l2_ctrl_vp9_compressed_hdr *hdr)
462{
463 if (hdr->tx_mode > V4L2_VP9_TX_MODE_SELECT)
464 return -EINVAL;
465
466 return 0;
467}
468
469static int
470validate_vp9_frame(struct v4l2_ctrl_vp9_frame *frame)
471{
472 int ret;
473
474 /* Make sure we're not passed invalid flags. */
475 if (frame->flags & ~(V4L2_VP9_FRAME_FLAG_KEY_FRAME |
476 V4L2_VP9_FRAME_FLAG_SHOW_FRAME |
477 V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT |
478 V4L2_VP9_FRAME_FLAG_INTRA_ONLY |
479 V4L2_VP9_FRAME_FLAG_ALLOW_HIGH_PREC_MV |
480 V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX |
481 V4L2_VP9_FRAME_FLAG_PARALLEL_DEC_MODE |
482 V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING |
483 V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING |
484 V4L2_VP9_FRAME_FLAG_COLOR_RANGE_FULL_SWING))
485 return -EINVAL;
486
487 if (frame->flags & V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT &&
488 frame->flags & V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX)
489 return -EINVAL;
490
491 if (frame->profile > V4L2_VP9_PROFILE_MAX)
492 return -EINVAL;
493
494 if (frame->reset_frame_context > V4L2_VP9_RESET_FRAME_CTX_ALL)
495 return -EINVAL;
496
497 if (frame->frame_context_idx >= V4L2_VP9_NUM_FRAME_CTX)
498 return -EINVAL;
499
500 /*
501 * Profiles 0 and 1 only support 8-bit depth, profiles 2 and 3 only 10
502 * and 12 bit depths.
503 */
504 if ((frame->profile < 2 && frame->bit_depth != 8) ||
505 (frame->profile >= 2 &&
506 (frame->bit_depth != 10 && frame->bit_depth != 12)))
507 return -EINVAL;
508
509 /* Profile 0 and 2 only accept YUV 4:2:0. */
510 if ((frame->profile == 0 || frame->profile == 2) &&
511 (!(frame->flags & V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING) ||
512 !(frame->flags & V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING)))
513 return -EINVAL;
514
515 /* Profile 1 and 3 only accept YUV 4:2:2, 4:4:0 and 4:4:4. */
516 if ((frame->profile == 1 || frame->profile == 3) &&
517 ((frame->flags & V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING) &&
518 (frame->flags & V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING)))
519 return -EINVAL;
520
521 if (frame->interpolation_filter > V4L2_VP9_INTERP_FILTER_SWITCHABLE)
522 return -EINVAL;
523
524 /*
525 * According to the spec, tile_cols_log2 shall be less than or equal
526 * to 6.
527 */
528 if (frame->tile_cols_log2 > 6)
529 return -EINVAL;
530
531 if (frame->reference_mode > V4L2_VP9_REFERENCE_MODE_SELECT)
532 return -EINVAL;
533
534 ret = validate_vp9_lf_params(&frame->lf);
535 if (ret)
536 return ret;
537
538 ret = validate_vp9_quant_params(&frame->quant);
539 if (ret)
540 return ret;
541
542 ret = validate_vp9_seg_params(&frame->seg);
543 if (ret)
544 return ret;
545
546 zero_reserved(*frame);
547 return 0;
548}
549
71c689dc
HV		 550/*
551 * Compound controls validation requires setting unused fields/flags to zero
f1739ec4
XR		 552 * in order to properly detect unchanged controls with v4l2_ctrl_type_op_equal's
553 * memcmp.
71c689dc
HV		 554 */
555static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
556 union v4l2_ctrl_ptr ptr)
557{
558 struct v4l2_ctrl_mpeg2_sequence *p_mpeg2_sequence;
559 struct v4l2_ctrl_mpeg2_picture *p_mpeg2_picture;
560 struct v4l2_ctrl_vp8_frame *p_vp8_frame;
561 struct v4l2_ctrl_fwht_params *p_fwht_params;
562 struct v4l2_ctrl_h264_sps *p_h264_sps;
563 struct v4l2_ctrl_h264_pps *p_h264_pps;
564 struct v4l2_ctrl_h264_pred_weights *p_h264_pred_weights;
565 struct v4l2_ctrl_h264_slice_params *p_h264_slice_params;
566 struct v4l2_ctrl_h264_decode_params *p_h264_dec_params;
567 struct v4l2_ctrl_hevc_sps *p_hevc_sps;
568 struct v4l2_ctrl_hevc_pps *p_hevc_pps;
71c689dc 569 struct v4l2_ctrl_hdr10_mastering_display *p_hdr10_mastering;
d395a78d 570 struct v4l2_ctrl_hevc_decode_params *p_hevc_decode_params;
71c689dc
HV		 571 struct v4l2_area *area;
572 void *p = ptr.p + idx * ctrl->elem_size;
573 unsigned int i;
574
575 switch ((u32)ctrl->type) {
576 case V4L2_CTRL_TYPE_MPEG2_SEQUENCE:
577 p_mpeg2_sequence = p;
578
579 switch (p_mpeg2_sequence->chroma_format) {
580 case 1: /* 4:2:0 */
581 case 2: /* 4:2:2 */
582 case 3: /* 4:4:4 */
583 break;
584 default:
585 return -EINVAL;
586 }
587 break;
588
589 case V4L2_CTRL_TYPE_MPEG2_PICTURE:
590 p_mpeg2_picture = p;
591
592 switch (p_mpeg2_picture->intra_dc_precision) {
593 case 0: /* 8 bits */
594 case 1: /* 9 bits */
595 case 2: /* 10 bits */
596 case 3: /* 11 bits */
597 break;
598 default:
599 return -EINVAL;
600 }
601
602 switch (p_mpeg2_picture->picture_structure) {
603 case V4L2_MPEG2_PIC_TOP_FIELD:
604 case V4L2_MPEG2_PIC_BOTTOM_FIELD:
605 case V4L2_MPEG2_PIC_FRAME:
606 break;
607 default:
608 return -EINVAL;
609 }
610
611 switch (p_mpeg2_picture->picture_coding_type) {
612 case V4L2_MPEG2_PIC_CODING_TYPE_I:
613 case V4L2_MPEG2_PIC_CODING_TYPE_P:
614 case V4L2_MPEG2_PIC_CODING_TYPE_B:
615 break;
616 default:
617 return -EINVAL;
618 }
619 zero_reserved(*p_mpeg2_picture);
620 break;
621
622 case V4L2_CTRL_TYPE_MPEG2_QUANTISATION:
623 break;
624
625 case V4L2_CTRL_TYPE_FWHT_PARAMS:
626 p_fwht_params = p;
627 if (p_fwht_params->version < V4L2_FWHT_VERSION)
628 return -EINVAL;
629 if (!p_fwht_params->width || !p_fwht_params->height)
630 return -EINVAL;
631 break;
632
633 case V4L2_CTRL_TYPE_H264_SPS:
634 p_h264_sps = p;
635
636 /* Some syntax elements are only conditionally valid */
637 if (p_h264_sps->pic_order_cnt_type != 0) {
638 p_h264_sps->log2_max_pic_order_cnt_lsb_minus4 = 0;
639 } else if (p_h264_sps->pic_order_cnt_type != 1) {
640 p_h264_sps->num_ref_frames_in_pic_order_cnt_cycle = 0;
641 p_h264_sps->offset_for_non_ref_pic = 0;
642 p_h264_sps->offset_for_top_to_bottom_field = 0;
643 memset(&p_h264_sps->offset_for_ref_frame, 0,
644 sizeof(p_h264_sps->offset_for_ref_frame));
645 }
646
647 if (!V4L2_H264_SPS_HAS_CHROMA_FORMAT(p_h264_sps)) {
648 p_h264_sps->chroma_format_idc = 1;
649 p_h264_sps->bit_depth_luma_minus8 = 0;
650 p_h264_sps->bit_depth_chroma_minus8 = 0;
651
652 p_h264_sps->flags &=
653 ~V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS;
654
655 if (p_h264_sps->chroma_format_idc < 3)
656 p_h264_sps->flags &=
657 ~V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE;
658 }
659
660 if (p_h264_sps->flags & V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY)
661 p_h264_sps->flags &=
662 ~V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD;
663
664 /*
665 * Chroma 4:2:2 format require at least High 4:2:2 profile.
666 *
667 * The H264 specification and well-known parser implementations
668 * use profile-idc values directly, as that is clearer and
669 * less ambiguous. We do the same here.
670 */
671 if (p_h264_sps->profile_idc < 122 &&
672 p_h264_sps->chroma_format_idc > 1)
673 return -EINVAL;
674 /* Chroma 4:4:4 format require at least High 4:2:2 profile */
675 if (p_h264_sps->profile_idc < 244 &&
676 p_h264_sps->chroma_format_idc > 2)
677 return -EINVAL;
678 if (p_h264_sps->chroma_format_idc > 3)
679 return -EINVAL;
680
681 if (p_h264_sps->bit_depth_luma_minus8 > 6)
682 return -EINVAL;
683 if (p_h264_sps->bit_depth_chroma_minus8 > 6)
684 return -EINVAL;
685 if (p_h264_sps->log2_max_frame_num_minus4 > 12)
686 return -EINVAL;
687 if (p_h264_sps->pic_order_cnt_type > 2)
688 return -EINVAL;
689 if (p_h264_sps->log2_max_pic_order_cnt_lsb_minus4 > 12)
690 return -EINVAL;
691 if (p_h264_sps->max_num_ref_frames > V4L2_H264_REF_LIST_LEN)
692 return -EINVAL;
693 break;
694
695 case V4L2_CTRL_TYPE_H264_PPS:
696 p_h264_pps = p;
697
698 if (p_h264_pps->num_slice_groups_minus1 > 7)
699 return -EINVAL;
700 if (p_h264_pps->num_ref_idx_l0_default_active_minus1 >
701 (V4L2_H264_REF_LIST_LEN - 1))
702 return -EINVAL;
703 if (p_h264_pps->num_ref_idx_l1_default_active_minus1 >
704 (V4L2_H264_REF_LIST_LEN - 1))
705 return -EINVAL;
706 if (p_h264_pps->weighted_bipred_idc > 2)
707 return -EINVAL;
708 /*
709 * pic_init_qp_minus26 shall be in the range of
710 * -(26 + QpBdOffset_y) to +25, inclusive,
711 * where QpBdOffset_y is 6 * bit_depth_luma_minus8
712 */
713 if (p_h264_pps->pic_init_qp_minus26 < -62 ||
714 p_h264_pps->pic_init_qp_minus26 > 25)
715 return -EINVAL;
716 if (p_h264_pps->pic_init_qs_minus26 < -26 ||
717 p_h264_pps->pic_init_qs_minus26 > 25)
718 return -EINVAL;
719 if (p_h264_pps->chroma_qp_index_offset < -12 ||
720 p_h264_pps->chroma_qp_index_offset > 12)
721 return -EINVAL;
722 if (p_h264_pps->second_chroma_qp_index_offset < -12 ||
723 p_h264_pps->second_chroma_qp_index_offset > 12)
724 return -EINVAL;
725 break;
726
727 case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
728 break;
729
730 case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS:
731 p_h264_pred_weights = p;
732
733 if (p_h264_pred_weights->luma_log2_weight_denom > 7)
734 return -EINVAL;
735 if (p_h264_pred_weights->chroma_log2_weight_denom > 7)
736 return -EINVAL;
737 break;
738
739 case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
740 p_h264_slice_params = p;
741
742 if (p_h264_slice_params->slice_type != V4L2_H264_SLICE_TYPE_B)
743 p_h264_slice_params->flags &=
744 ~V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED;
745
746 if (p_h264_slice_params->colour_plane_id > 2)
747 return -EINVAL;
748 if (p_h264_slice_params->cabac_init_idc > 2)
749 return -EINVAL;
750 if (p_h264_slice_params->disable_deblocking_filter_idc > 2)
751 return -EINVAL;
752 if (p_h264_slice_params->slice_alpha_c0_offset_div2 < -6 ||
753 p_h264_slice_params->slice_alpha_c0_offset_div2 > 6)
754 return -EINVAL;
755 if (p_h264_slice_params->slice_beta_offset_div2 < -6 ||
756 p_h264_slice_params->slice_beta_offset_div2 > 6)
757 return -EINVAL;
758
759 if (p_h264_slice_params->slice_type == V4L2_H264_SLICE_TYPE_I ||
760 p_h264_slice_params->slice_type == V4L2_H264_SLICE_TYPE_SI)
761 p_h264_slice_params->num_ref_idx_l0_active_minus1 = 0;
762 if (p_h264_slice_params->slice_type != V4L2_H264_SLICE_TYPE_B)
763 p_h264_slice_params->num_ref_idx_l1_active_minus1 = 0;
764
765 if (p_h264_slice_params->num_ref_idx_l0_active_minus1 >
766 (V4L2_H264_REF_LIST_LEN - 1))
767 return -EINVAL;
768 if (p_h264_slice_params->num_ref_idx_l1_active_minus1 >
769 (V4L2_H264_REF_LIST_LEN - 1))
770 return -EINVAL;
771 zero_reserved(*p_h264_slice_params);
772 break;
773
774 case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
775 p_h264_dec_params = p;
776
777 if (p_h264_dec_params->nal_ref_idc > 3)
778 return -EINVAL;
779 for (i = 0; i < V4L2_H264_NUM_DPB_ENTRIES; i++) {
780 struct v4l2_h264_dpb_entry *dpb_entry =
781 &p_h264_dec_params->dpb[i];
782
783 zero_reserved(*dpb_entry);
784 }
785 zero_reserved(*p_h264_dec_params);
786 break;
787
788 case V4L2_CTRL_TYPE_VP8_FRAME:
789 p_vp8_frame = p;
790
791 switch (p_vp8_frame->num_dct_parts) {
792 case 1:
793 case 2:
794 case 4:
795 case 8:
796 break;
797 default:
798 return -EINVAL;
799 }
800 zero_padding(p_vp8_frame->segment);
801 zero_padding(p_vp8_frame->lf);
802 zero_padding(p_vp8_frame->quant);
803 zero_padding(p_vp8_frame->entropy);
804 zero_padding(p_vp8_frame->coder_state);
805 break;
806
807 case V4L2_CTRL_TYPE_HEVC_SPS:
808 p_hevc_sps = p;
809
810 if (!(p_hevc_sps->flags & V4L2_HEVC_SPS_FLAG_PCM_ENABLED)) {
811 p_hevc_sps->pcm_sample_bit_depth_luma_minus1 = 0;
812 p_hevc_sps->pcm_sample_bit_depth_chroma_minus1 = 0;
813 p_hevc_sps->log2_min_pcm_luma_coding_block_size_minus3 = 0;
814 p_hevc_sps->log2_diff_max_min_pcm_luma_coding_block_size = 0;
815 }
816
817 if (!(p_hevc_sps->flags &
818 V4L2_HEVC_SPS_FLAG_LONG_TERM_REF_PICS_PRESENT))
819 p_hevc_sps->num_long_term_ref_pics_sps = 0;
820 break;
821
822 case V4L2_CTRL_TYPE_HEVC_PPS:
823 p_hevc_pps = p;
824
825 if (!(p_hevc_pps->flags &
826 V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED))
827 p_hevc_pps->diff_cu_qp_delta_depth = 0;
828
829 if (!(p_hevc_pps->flags & V4L2_HEVC_PPS_FLAG_TILES_ENABLED)) {
830 p_hevc_pps->num_tile_columns_minus1 = 0;
831 p_hevc_pps->num_tile_rows_minus1 = 0;
832 memset(&p_hevc_pps->column_width_minus1, 0,
833 sizeof(p_hevc_pps->column_width_minus1));
834 memset(&p_hevc_pps->row_height_minus1, 0,
835 sizeof(p_hevc_pps->row_height_minus1));
836
837 p_hevc_pps->flags &=
838 ~V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED;
839 }
840
841 if (p_hevc_pps->flags &
842 V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER) {
843 p_hevc_pps->pps_beta_offset_div2 = 0;
844 p_hevc_pps->pps_tc_offset_div2 = 0;
845 }
71c689dc
HV		 846 break;
847
d395a78d
BG		 848 case V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS:
849 p_hevc_decode_params = p;
71c689dc 850
d395a78d 851 if (p_hevc_decode_params->num_active_dpb_entries >
71c689dc
HV		 852 V4L2_HEVC_DPB_ENTRIES_NUM_MAX)
853 return -EINVAL;
d395a78d 854 break;
71c689dc 855
d395a78d 856 case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
71c689dc
HV		 857 break;
858
859 case V4L2_CTRL_TYPE_HDR10_CLL_INFO:
860 break;
861
862 case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY:
863 p_hdr10_mastering = p;
864
865 for (i = 0; i < 3; ++i) {
866 if (p_hdr10_mastering->display_primaries_x[i] <
867 V4L2_HDR10_MASTERING_PRIMARIES_X_LOW ||
868 p_hdr10_mastering->display_primaries_x[i] >
869 V4L2_HDR10_MASTERING_PRIMARIES_X_HIGH ||
870 p_hdr10_mastering->display_primaries_y[i] <
871 V4L2_HDR10_MASTERING_PRIMARIES_Y_LOW ||
872 p_hdr10_mastering->display_primaries_y[i] >
873 V4L2_HDR10_MASTERING_PRIMARIES_Y_HIGH)
874 return -EINVAL;
875 }
876
877 if (p_hdr10_mastering->white_point_x <
878 V4L2_HDR10_MASTERING_WHITE_POINT_X_LOW ||
879 p_hdr10_mastering->white_point_x >
880 V4L2_HDR10_MASTERING_WHITE_POINT_X_HIGH ||
881 p_hdr10_mastering->white_point_y <
882 V4L2_HDR10_MASTERING_WHITE_POINT_Y_LOW ||
883 p_hdr10_mastering->white_point_y >
884 V4L2_HDR10_MASTERING_WHITE_POINT_Y_HIGH)
885 return -EINVAL;
886
887 if (p_hdr10_mastering->max_display_mastering_luminance <
888 V4L2_HDR10_MASTERING_MAX_LUMA_LOW ||
889 p_hdr10_mastering->max_display_mastering_luminance >
890 V4L2_HDR10_MASTERING_MAX_LUMA_HIGH ||
891 p_hdr10_mastering->min_display_mastering_luminance <
892 V4L2_HDR10_MASTERING_MIN_LUMA_LOW ||
893 p_hdr10_mastering->min_display_mastering_luminance >
894 V4L2_HDR10_MASTERING_MIN_LUMA_HIGH)
895 return -EINVAL;
896
897 /* The following restriction comes from ITU-T Rec. H.265 spec */
898 if (p_hdr10_mastering->max_display_mastering_luminance ==
899 V4L2_HDR10_MASTERING_MAX_LUMA_LOW &&
900 p_hdr10_mastering->min_display_mastering_luminance ==
901 V4L2_HDR10_MASTERING_MIN_LUMA_HIGH)
902 return -EINVAL;
903
904 break;
905
7ba59fb6
BG		 906 case V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX:
907 break;
908
b88dbe38
AP		 909 case V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR:
910 return validate_vp9_compressed_hdr(p);
911
912 case V4L2_CTRL_TYPE_VP9_FRAME:
913 return validate_vp9_frame(p);
914
71c689dc
HV		 915 case V4L2_CTRL_TYPE_AREA:
916 area = p;
917 if (!area->width || !area->height)
918 return -EINVAL;
919 break;
920
921 default:
922 return -EINVAL;
923 }
924
925 return 0;
926}
927
6b1aaa68
HV		 928static int std_validate_elem(const struct v4l2_ctrl *ctrl, u32 idx,
929 union v4l2_ctrl_ptr ptr)
71c689dc
HV		 930{
931 size_t len;
932 u64 offset;
933 s64 val;
934
935 switch ((u32)ctrl->type) {
936 case V4L2_CTRL_TYPE_INTEGER:
937 return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl);
938 case V4L2_CTRL_TYPE_INTEGER64:
939 /*
940 * We can't use the ROUND_TO_RANGE define here due to
941 * the u64 divide that needs special care.
942 */
943 val = ptr.p_s64[idx];
944 if (ctrl->maximum >= 0 && val >= ctrl->maximum - (s64)(ctrl->step / 2))
945 val = ctrl->maximum;
946 else
947 val += (s64)(ctrl->step / 2);
948 val = clamp_t(s64, val, ctrl->minimum, ctrl->maximum);
949 offset = val - ctrl->minimum;
950 do_div(offset, ctrl->step);
951 ptr.p_s64[idx] = ctrl->minimum + offset * ctrl->step;
952 return 0;
953 case V4L2_CTRL_TYPE_U8:
954 return ROUND_TO_RANGE(ptr.p_u8[idx], u8, ctrl);
955 case V4L2_CTRL_TYPE_U16:
956 return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl);
957 case V4L2_CTRL_TYPE_U32:
958 return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl);
959
960 case V4L2_CTRL_TYPE_BOOLEAN:
961 ptr.p_s32[idx] = !!ptr.p_s32[idx];
962 return 0;
963
964 case V4L2_CTRL_TYPE_MENU:
965 case V4L2_CTRL_TYPE_INTEGER_MENU:
966 if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum)
967 return -ERANGE;
968 if (ptr.p_s32[idx] < BITS_PER_LONG_LONG &&
969 (ctrl->menu_skip_mask & BIT_ULL(ptr.p_s32[idx])))
970 return -EINVAL;
971 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
972 ctrl->qmenu[ptr.p_s32[idx]][0] == '\0')
973 return -EINVAL;
974 return 0;
975
976 case V4L2_CTRL_TYPE_BITMASK:
977 ptr.p_s32[idx] &= ctrl->maximum;
978 return 0;
979
980 case V4L2_CTRL_TYPE_BUTTON:
981 case V4L2_CTRL_TYPE_CTRL_CLASS:
982 ptr.p_s32[idx] = 0;
983 return 0;
984
985 case V4L2_CTRL_TYPE_STRING:
986 idx *= ctrl->elem_size;
987 len = strlen(ptr.p_char + idx);
988 if (len < ctrl->minimum)
989 return -ERANGE;
990 if ((len - (u32)ctrl->minimum) % (u32)ctrl->step)
991 return -ERANGE;
992 return 0;
993
994 default:
995 return std_validate_compound(ctrl, idx, ptr);
996 }
997}
998
cd75981e 999int v4l2_ctrl_type_op_validate(const struct v4l2_ctrl *ctrl,
f1739ec4 1000 union v4l2_ctrl_ptr ptr)
6b1aaa68
HV		 1001{
1002 unsigned int i;
1003 int ret = 0;
1004
1005 switch ((u32)ctrl->type) {
1006 case V4L2_CTRL_TYPE_U8:
1007 if (ctrl->maximum == 0xff && ctrl->minimum == 0 && ctrl->step == 1)
1008 return 0;
1009 break;
1010 case V4L2_CTRL_TYPE_U16:
1011 if (ctrl->maximum == 0xffff && ctrl->minimum == 0 && ctrl->step == 1)
1012 return 0;
1013 break;
1014 case V4L2_CTRL_TYPE_U32:
1015 if (ctrl->maximum == 0xffffffff && ctrl->minimum == 0 && ctrl->step == 1)
1016 return 0;
1017 break;
1018
1019 case V4L2_CTRL_TYPE_BUTTON:
1020 case V4L2_CTRL_TYPE_CTRL_CLASS:
cd75981e 1021 memset(ptr.p_s32, 0, ctrl->new_elems * sizeof(s32));
6b1aaa68
HV		 1022 return 0;
1023 }
1024
cd75981e 1025 for (i = 0; !ret && i < ctrl->new_elems; i++)
6b1aaa68
HV		 1026 ret = std_validate_elem(ctrl, i, ptr);
1027 return ret;
1028}
f1739ec4 1029EXPORT_SYMBOL(v4l2_ctrl_type_op_validate);
6b1aaa68 1030
71c689dc 1031static const struct v4l2_ctrl_type_ops std_type_ops = {
f1739ec4
XR		 1032 .equal = v4l2_ctrl_type_op_equal,
1033 .init = v4l2_ctrl_type_op_init,
1034 .log = v4l2_ctrl_type_op_log,
1035 .validate = v4l2_ctrl_type_op_validate,
71c689dc
HV		 1036};
1037
1038void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
1039{
1040 if (!ctrl)
1041 return;
1042 if (!notify) {
1043 ctrl->call_notify = 0;
1044 return;
1045 }
1046 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
1047 return;
1048 ctrl->handler->notify = notify;
1049 ctrl->handler->notify_priv = priv;
1050 ctrl->call_notify = 1;
1051}
1052EXPORT_SYMBOL(v4l2_ctrl_notify);
1053
1054/* Copy the one value to another. */
1055static void ptr_to_ptr(struct v4l2_ctrl *ctrl,
fb582cba
HV		 1056 union v4l2_ctrl_ptr from, union v4l2_ctrl_ptr to,
1057 unsigned int elems)
71c689dc
HV		 1058{
1059 if (ctrl == NULL)
1060 return;
fb582cba 1061 memcpy(to.p, from.p_const, elems * ctrl->elem_size);
71c689dc
HV		 1062}
1063
1064/* Copy the new value to the current value. */
1065void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
1066{
1067 bool changed;
1068
1069 if (ctrl == NULL)
1070 return;
1071
1072 /* has_changed is set by cluster_changed */
1073 changed = ctrl->has_changed;
fb582cba
HV		 1074 if (changed) {
1075 if (ctrl->is_dyn_array)
1076 ctrl->elems = ctrl->new_elems;
1077 ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_cur, ctrl->elems);
1078 }
71c689dc
HV		 1079
1080 if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
1081 /* Note: CH_FLAGS is only set for auto clusters. */
1082 ctrl->flags &=
1083 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
1084 if (!is_cur_manual(ctrl->cluster[0])) {
1085 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
1086 if (ctrl->cluster[0]->has_volatiles)
1087 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
1088 }
1089 fh = NULL;
1090 }
1091 if (changed || ch_flags) {
1092 /* If a control was changed that was not one of the controls
1093 modified by the application, then send the event to all. */
1094 if (!ctrl->is_new)
1095 fh = NULL;
1096 send_event(fh, ctrl,
1097 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
1098 if (ctrl->call_notify && changed && ctrl->handler->notify)
1099 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
1100 }
1101}
1102
1103/* Copy the current value to the new value */
1104void cur_to_new(struct v4l2_ctrl *ctrl)
1105{
1106 if (ctrl == NULL)
1107 return;
fb582cba
HV		 1108 if (ctrl->is_dyn_array)
1109 ctrl->new_elems = ctrl->elems;
1110 ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new, ctrl->new_elems);
1111}
1112
7392d87a 1113static bool req_alloc_array(struct v4l2_ctrl_ref *ref, u32 elems)
fb582cba
HV		 1114{
1115 void *tmp;
1116
7392d87a
HV		 1117 if (elems == ref->p_req_array_alloc_elems)
1118 return true;
1119 if (ref->ctrl->is_dyn_array &&
1120 elems < ref->p_req_array_alloc_elems)
fb582cba
HV		 1121 return true;
1122
1123 tmp = kvmalloc(elems * ref->ctrl->elem_size, GFP_KERNEL);
1124
1125 if (!tmp) {
7392d87a 1126 ref->p_req_array_enomem = true;
fb582cba
HV		 1127 return false;
1128 }
7392d87a 1129 ref->p_req_array_enomem = false;
fb582cba
HV		 1130 kvfree(ref->p_req.p);
1131 ref->p_req.p = tmp;
7392d87a 1132 ref->p_req_array_alloc_elems = elems;
fb582cba 1133 return true;
71c689dc
HV		 1134}
1135
1136/* Copy the new value to the request value */
1137void new_to_req(struct v4l2_ctrl_ref *ref)
1138{
fb582cba
HV		 1139 struct v4l2_ctrl *ctrl;
1140
71c689dc
HV		 1141 if (!ref)
1142 return;
fb582cba
HV		 1143
1144 ctrl = ref->ctrl;
7392d87a 1145 if (ctrl->is_array && !req_alloc_array(ref, ctrl->new_elems))
fb582cba
HV		 1146 return;
1147
1148 ref->p_req_elems = ctrl->new_elems;
1149 ptr_to_ptr(ctrl, ctrl->p_new, ref->p_req, ref->p_req_elems);
1150 ref->p_req_valid = true;
71c689dc
HV		 1151}
1152
1153/* Copy the current value to the request value */
1154void cur_to_req(struct v4l2_ctrl_ref *ref)
1155{
fb582cba
HV		 1156 struct v4l2_ctrl *ctrl;
1157
71c689dc
HV		 1158 if (!ref)
1159 return;
fb582cba
HV		 1160
1161 ctrl = ref->ctrl;
7392d87a 1162 if (ctrl->is_array && !req_alloc_array(ref, ctrl->elems))
fb582cba
HV		 1163 return;
1164
1165 ref->p_req_elems = ctrl->elems;
1166 ptr_to_ptr(ctrl, ctrl->p_cur, ref->p_req, ctrl->elems);
1167 ref->p_req_valid = true;
71c689dc
HV		 1168}
1169
1170/* Copy the request value to the new value */
fb582cba 1171int req_to_new(struct v4l2_ctrl_ref *ref)
71c689dc 1172{
fb582cba
HV		 1173 struct v4l2_ctrl *ctrl;
1174
71c689dc 1175 if (!ref)
fb582cba
HV		 1176 return 0;
1177
1178 ctrl = ref->ctrl;
1179
1180 /*
1181 * This control was never set in the request, so just use the current
1182 * value.
1183 */
1184 if (!ref->p_req_valid) {
1185 if (ctrl->is_dyn_array)
1186 ctrl->new_elems = ctrl->elems;
1187 ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new, ctrl->new_elems);
1188 return 0;
1189 }
1190
7392d87a
HV		 1191 /* Not an array, so just copy the request value */
1192 if (!ctrl->is_array) {
fb582cba
HV		 1193 ptr_to_ptr(ctrl, ref->p_req, ctrl->p_new, ctrl->new_elems);
1194 return 0;
1195 }
1196
1197 /* Sanity check, should never happen */
7392d87a
HV		 1198 if (WARN_ON(!ref->p_req_array_alloc_elems))
1199 return -ENOMEM;
1200
1201 if (!ctrl->is_dyn_array &&
1202 ref->p_req_elems != ctrl->p_array_alloc_elems)
fb582cba
HV		 1203 return -ENOMEM;
1204
1205 /*
1206 * Check if the number of elements in the request is more than the
5f2c5c69
HV		 1207 * elements in ctrl->p_array. If so, attempt to realloc ctrl->p_array.
1208 * Note that p_array is allocated with twice the number of elements
fb582cba
HV		 1209 * in the dynamic array since it has to store both the current and
1210 * new value of such a control.
1211 */
5f2c5c69 1212 if (ref->p_req_elems > ctrl->p_array_alloc_elems) {
fb582cba 1213 unsigned int sz = ref->p_req_elems * ctrl->elem_size;
5f2c5c69 1214 void *old = ctrl->p_array;
fb582cba
HV		 1215 void *tmp = kvzalloc(2 * sz, GFP_KERNEL);
1216
1217 if (!tmp)
1218 return -ENOMEM;
1219 memcpy(tmp, ctrl->p_new.p, ctrl->elems * ctrl->elem_size);
1220 memcpy(tmp + sz, ctrl->p_cur.p, ctrl->elems * ctrl->elem_size);
1221 ctrl->p_new.p = tmp;
1222 ctrl->p_cur.p = tmp + sz;
5f2c5c69
HV		 1223 ctrl->p_array = tmp;
1224 ctrl->p_array_alloc_elems = ref->p_req_elems;
fb582cba
HV		 1225 kvfree(old);
1226 }
1227
1228 ctrl->new_elems = ref->p_req_elems;
1229 ptr_to_ptr(ctrl, ref->p_req, ctrl->p_new, ctrl->new_elems);
1230 return 0;
71c689dc
HV		 1231}
1232
1233/* Control range checking */
1234int check_range(enum v4l2_ctrl_type type,
1235 s64 min, s64 max, u64 step, s64 def)
1236{
1237 switch (type) {
1238 case V4L2_CTRL_TYPE_BOOLEAN:
1239 if (step != 1 || max > 1 || min < 0)
1240 return -ERANGE;
1241 fallthrough;
1242 case V4L2_CTRL_TYPE_U8:
1243 case V4L2_CTRL_TYPE_U16:
1244 case V4L2_CTRL_TYPE_U32:
1245 case V4L2_CTRL_TYPE_INTEGER:
1246 case V4L2_CTRL_TYPE_INTEGER64:
1247 if (step == 0 || min > max || def < min || def > max)
1248 return -ERANGE;
1249 return 0;
1250 case V4L2_CTRL_TYPE_BITMASK:
1251 if (step || min || !max || (def & ~max))
1252 return -ERANGE;
1253 return 0;
1254 case V4L2_CTRL_TYPE_MENU:
1255 case V4L2_CTRL_TYPE_INTEGER_MENU:
1256 if (min > max || def < min || def > max)
1257 return -ERANGE;
1258 /* Note: step == menu_skip_mask for menu controls.
1259 So here we check if the default value is masked out. */
1260 if (step && ((1 << def) & step))
1261 return -EINVAL;
1262 return 0;
1263 case V4L2_CTRL_TYPE_STRING:
1264 if (min > max || min < 0 || step < 1 || def)
1265 return -ERANGE;
1266 return 0;
1267 default:
1268 return 0;
1269 }
1270}
1271
71c689dc
HV		 1272/* Set the handler's error code if it wasn't set earlier already */
1273static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
1274{
1275 if (hdl->error == 0)
1276 hdl->error = err;
1277 return err;
1278}
1279
1280/* Initialize the handler */
1281int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,
1282 unsigned nr_of_controls_hint,
1283 struct lock_class_key *key, const char *name)
1284{
1285 mutex_init(&hdl->_lock);
1286 hdl->lock = &hdl->_lock;
1287 lockdep_set_class_and_name(hdl->lock, key, name);
1288 INIT_LIST_HEAD(&hdl->ctrls);
1289 INIT_LIST_HEAD(&hdl->ctrl_refs);
1290 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
1577d804
HV		 1291 hdl->buckets = kvcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),
1292 GFP_KERNEL);
71c689dc
HV		 1293 hdl->error = hdl->buckets ? 0 : -ENOMEM;
1294 v4l2_ctrl_handler_init_request(hdl);
1295 return hdl->error;
1296}
1297EXPORT_SYMBOL(v4l2_ctrl_handler_init_class);
1298
1299/* Free all controls and control refs */
1300void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
1301{
1302 struct v4l2_ctrl_ref *ref, *next_ref;
1303 struct v4l2_ctrl *ctrl, *next_ctrl;
1304 struct v4l2_subscribed_event *sev, *next_sev;
1305
1306 if (hdl == NULL || hdl->buckets == NULL)
1307 return;
1308
1309 v4l2_ctrl_handler_free_request(hdl);
1310
1311 mutex_lock(hdl->lock);
1312 /* Free all nodes */
1313 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
1314 list_del(&ref->node);
7392d87a 1315 if (ref->p_req_array_alloc_elems)
fb582cba 1316 kvfree(ref->p_req.p);
71c689dc
HV		 1317 kfree(ref);
1318 }
1319 /* Free all controls owned by the handler */
1320 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
1321 list_del(&ctrl->node);
1322 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
1323 list_del(&sev->node);
5f2c5c69 1324 kvfree(ctrl->p_array);
71c689dc
HV		 1325 kvfree(ctrl);
1326 }
1327 kvfree(hdl->buckets);
1328 hdl->buckets = NULL;
1329 hdl->cached = NULL;
1330 hdl->error = 0;
1331 mutex_unlock(hdl->lock);
1332 mutex_destroy(&hdl->_lock);
1333}
1334EXPORT_SYMBOL(v4l2_ctrl_handler_free);
1335
1336/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
1337 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
1338 with applications that do not use the NEXT_CTRL flag.
1339
1340 We just find the n-th private user control. It's O(N), but that should not
1341 be an issue in this particular case. */
1342static struct v4l2_ctrl_ref *find_private_ref(
1343 struct v4l2_ctrl_handler *hdl, u32 id)
1344{
1345 struct v4l2_ctrl_ref *ref;
1346
1347 id -= V4L2_CID_PRIVATE_BASE;
1348 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1349 /* Search for private user controls that are compatible with
1350 VIDIOC_G/S_CTRL. */
1351 if (V4L2_CTRL_ID2WHICH(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
1352 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
1353 if (!ref->ctrl->is_int)
1354 continue;
1355 if (id == 0)
1356 return ref;
1357 id--;
1358 }
1359 }
1360 return NULL;
1361}
1362
1363/* Find a control with the given ID. */
1364struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
1365{
1366 struct v4l2_ctrl_ref *ref;
1367 int bucket;
1368
1369 id &= V4L2_CTRL_ID_MASK;
1370
1371 /* Old-style private controls need special handling */
1372 if (id >= V4L2_CID_PRIVATE_BASE)
1373 return find_private_ref(hdl, id);
1374 bucket = id % hdl->nr_of_buckets;
1375
1376 /* Simple optimization: cache the last control found */
1377 if (hdl->cached && hdl->cached->ctrl->id == id)
1378 return hdl->cached;
1379
1380 /* Not in cache, search the hash */
1381 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
1382 while (ref && ref->ctrl->id != id)
1383 ref = ref->next;
1384
1385 if (ref)
1386 hdl->cached = ref; /* cache it! */
1387 return ref;
1388}
1389
1390/* Find a control with the given ID. Take the handler's lock first. */
1391struct v4l2_ctrl_ref *find_ref_lock(struct v4l2_ctrl_handler *hdl, u32 id)
1392{
1393 struct v4l2_ctrl_ref *ref = NULL;
1394
1395 if (hdl) {
1396 mutex_lock(hdl->lock);
1397 ref = find_ref(hdl, id);
1398 mutex_unlock(hdl->lock);
1399 }
1400 return ref;
1401}
1402
1403/* Find a control with the given ID. */
1404struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
1405{
1406 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
1407
1408 return ref ? ref->ctrl : NULL;
1409}
1410EXPORT_SYMBOL(v4l2_ctrl_find);
1411
1412/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
1413int handler_new_ref(struct v4l2_ctrl_handler *hdl,
1414 struct v4l2_ctrl *ctrl,
1415 struct v4l2_ctrl_ref **ctrl_ref,
1416 bool from_other_dev, bool allocate_req)
1417{
1418 struct v4l2_ctrl_ref *ref;
1419 struct v4l2_ctrl_ref *new_ref;
1420 u32 id = ctrl->id;
1421 u32 class_ctrl = V4L2_CTRL_ID2WHICH(id) | 1;
1422 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
1423 unsigned int size_extra_req = 0;
1424
1425 if (ctrl_ref)
1426 *ctrl_ref = NULL;
1427
1428 /*
1429 * Automatically add the control class if it is not yet present and
1430 * the new control is not a compound control.
1431 */
1432 if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES &&
1433 id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
1434 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
1435 return hdl->error;
1436
1437 if (hdl->error)
1438 return hdl->error;
1439
7392d87a 1440 if (allocate_req && !ctrl->is_array)
71c689dc
HV		 1441 size_extra_req = ctrl->elems * ctrl->elem_size;
1442 new_ref = kzalloc(sizeof(*new_ref) + size_extra_req, GFP_KERNEL);
1443 if (!new_ref)
1444 return handler_set_err(hdl, -ENOMEM);
1445 new_ref->ctrl = ctrl;
1446 new_ref->from_other_dev = from_other_dev;
1447 if (size_extra_req)
1448 new_ref->p_req.p = &new_ref[1];
1449
1450 INIT_LIST_HEAD(&new_ref->node);
1451
1452 mutex_lock(hdl->lock);
1453
1454 /* Add immediately at the end of the list if the list is empty, or if
1455 the last element in the list has a lower ID.
1456 This ensures that when elements are added in ascending order the
1457 insertion is an O(1) operation. */
1458 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
1459 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
1460 goto insert_in_hash;
1461 }
1462
1463 /* Find insert position in sorted list */
1464 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1465 if (ref->ctrl->id < id)
1466 continue;
1467 /* Don't add duplicates */
1468 if (ref->ctrl->id == id) {
1469 kfree(new_ref);
1470 goto unlock;
1471 }
1472 list_add(&new_ref->node, ref->node.prev);
1473 break;
1474 }
1475
1476insert_in_hash:
1477 /* Insert the control node in the hash */
1478 new_ref->next = hdl->buckets[bucket];
1479 hdl->buckets[bucket] = new_ref;
1480 if (ctrl_ref)
1481 *ctrl_ref = new_ref;
1482 if (ctrl->handler == hdl) {
1483 /* By default each control starts in a cluster of its own.
1484 * new_ref->ctrl is basically a cluster array with one
1485 * element, so that's perfect to use as the cluster pointer.
1486 * But only do this for the handler that owns the control.
1487 */
1488 ctrl->cluster = &new_ref->ctrl;
1489 ctrl->ncontrols = 1;
1490 }
1491
1492unlock:
1493 mutex_unlock(hdl->lock);
1494 return 0;
1495}
1496
1497/* Add a new control */
1498static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
1499 const struct v4l2_ctrl_ops *ops,
1500 const struct v4l2_ctrl_type_ops *type_ops,
1501 u32 id, const char *name, enum v4l2_ctrl_type type,
1502 s64 min, s64 max, u64 step, s64 def,
1503 const u32 dims[V4L2_CTRL_MAX_DIMS], u32 elem_size,
1504 u32 flags, const char * const *qmenu,
1505 const s64 *qmenu_int, const union v4l2_ctrl_ptr p_def,
1506 void *priv)
1507{
1508 struct v4l2_ctrl *ctrl;
1509 unsigned sz_extra;
1510 unsigned nr_of_dims = 0;
1511 unsigned elems = 1;
1512 bool is_array;
1513 unsigned tot_ctrl_size;
71c689dc
HV		 1514 void *data;
1515 int err;
1516
1517 if (hdl->error)
1518 return NULL;
1519
1520 while (dims && dims[nr_of_dims]) {
1521 elems *= dims[nr_of_dims];
1522 nr_of_dims++;
1523 if (nr_of_dims == V4L2_CTRL_MAX_DIMS)
1524 break;
1525 }
1526 is_array = nr_of_dims > 0;
1527
1528 /* Prefill elem_size for all types handled by std_type_ops */
1529 switch ((u32)type) {
1530 case V4L2_CTRL_TYPE_INTEGER64:
1531 elem_size = sizeof(s64);
1532 break;
1533 case V4L2_CTRL_TYPE_STRING:
1534 elem_size = max + 1;
1535 break;
1536 case V4L2_CTRL_TYPE_U8:
1537 elem_size = sizeof(u8);
1538 break;
1539 case V4L2_CTRL_TYPE_U16:
1540 elem_size = sizeof(u16);
1541 break;
1542 case V4L2_CTRL_TYPE_U32:
1543 elem_size = sizeof(u32);
1544 break;
1545 case V4L2_CTRL_TYPE_MPEG2_SEQUENCE:
1546 elem_size = sizeof(struct v4l2_ctrl_mpeg2_sequence);
1547 break;
1548 case V4L2_CTRL_TYPE_MPEG2_PICTURE:
1549 elem_size = sizeof(struct v4l2_ctrl_mpeg2_picture);
1550 break;
1551 case V4L2_CTRL_TYPE_MPEG2_QUANTISATION:
1552 elem_size = sizeof(struct v4l2_ctrl_mpeg2_quantisation);
1553 break;
1554 case V4L2_CTRL_TYPE_FWHT_PARAMS:
1555 elem_size = sizeof(struct v4l2_ctrl_fwht_params);
1556 break;
1557 case V4L2_CTRL_TYPE_H264_SPS:
1558 elem_size = sizeof(struct v4l2_ctrl_h264_sps);
1559 break;
1560 case V4L2_CTRL_TYPE_H264_PPS:
1561 elem_size = sizeof(struct v4l2_ctrl_h264_pps);
1562 break;
1563 case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
1564 elem_size = sizeof(struct v4l2_ctrl_h264_scaling_matrix);
1565 break;
1566 case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
1567 elem_size = sizeof(struct v4l2_ctrl_h264_slice_params);
1568 break;
1569 case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
1570 elem_size = sizeof(struct v4l2_ctrl_h264_decode_params);
1571 break;
1572 case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS:
1573 elem_size = sizeof(struct v4l2_ctrl_h264_pred_weights);
1574 break;
1575 case V4L2_CTRL_TYPE_VP8_FRAME:
1576 elem_size = sizeof(struct v4l2_ctrl_vp8_frame);
1577 break;
1578 case V4L2_CTRL_TYPE_HEVC_SPS:
1579 elem_size = sizeof(struct v4l2_ctrl_hevc_sps);
1580 break;
1581 case V4L2_CTRL_TYPE_HEVC_PPS:
1582 elem_size = sizeof(struct v4l2_ctrl_hevc_pps);
1583 break;
1584 case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
1585 elem_size = sizeof(struct v4l2_ctrl_hevc_slice_params);
1586 break;
7ba59fb6
BG		 1587 case V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX:
1588 elem_size = sizeof(struct v4l2_ctrl_hevc_scaling_matrix);
1589 break;
d395a78d
BG		 1590 case V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS:
1591 elem_size = sizeof(struct v4l2_ctrl_hevc_decode_params);
1592 break;
71c689dc
HV		 1593 case V4L2_CTRL_TYPE_HDR10_CLL_INFO:
1594 elem_size = sizeof(struct v4l2_ctrl_hdr10_cll_info);
1595 break;
1596 case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY:
1597 elem_size = sizeof(struct v4l2_ctrl_hdr10_mastering_display);
1598 break;
b88dbe38
AP		 1599 case V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR:
1600 elem_size = sizeof(struct v4l2_ctrl_vp9_compressed_hdr);
1601 break;
1602 case V4L2_CTRL_TYPE_VP9_FRAME:
1603 elem_size = sizeof(struct v4l2_ctrl_vp9_frame);
1604 break;
71c689dc
HV		 1605 case V4L2_CTRL_TYPE_AREA:
1606 elem_size = sizeof(struct v4l2_area);
1607 break;
1608 default:
1609 if (type < V4L2_CTRL_COMPOUND_TYPES)
1610 elem_size = sizeof(s32);
1611 break;
1612 }
71c689dc
HV		 1613
1614 /* Sanity checks */
1615 if (id == 0 || name == NULL || !elem_size ||
1616 id >= V4L2_CID_PRIVATE_BASE ||
1617 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
1618 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
1619 handler_set_err(hdl, -ERANGE);
1620 return NULL;
1621 }
1622 err = check_range(type, min, max, step, def);
1623 if (err) {
1624 handler_set_err(hdl, err);
1625 return NULL;
1626 }
1627 if (is_array &&
1628 (type == V4L2_CTRL_TYPE_BUTTON ||
1629 type == V4L2_CTRL_TYPE_CTRL_CLASS)) {
1630 handler_set_err(hdl, -EINVAL);
1631 return NULL;
1632 }
fb582cba
HV		 1633 if (flags & V4L2_CTRL_FLAG_DYNAMIC_ARRAY) {
1634 /*
1635 * For now only support this for one-dimensional arrays only.
1636 *
1637 * This can be relaxed in the future, but this will
1638 * require more effort.
1639 */
1640 if (nr_of_dims != 1) {
1641 handler_set_err(hdl, -EINVAL);
1642 return NULL;
1643 }
1644 /* Start with just 1 element */
1645 elems = 1;
1646 }
71c689dc 1647
fb582cba 1648 tot_ctrl_size = elem_size * elems;
71c689dc
HV		 1649 sz_extra = 0;
1650 if (type == V4L2_CTRL_TYPE_BUTTON)
1651 flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1652 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
1653 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
1654 flags |= V4L2_CTRL_FLAG_READ_ONLY;
5f2c5c69 1655 else if (!is_array &&
fb582cba
HV		 1656 (type == V4L2_CTRL_TYPE_INTEGER64 ||
1657 type == V4L2_CTRL_TYPE_STRING ||
5f2c5c69 1658 type >= V4L2_CTRL_COMPOUND_TYPES))
71c689dc
HV		 1659 sz_extra += 2 * tot_ctrl_size;
1660
1661 if (type >= V4L2_CTRL_COMPOUND_TYPES && p_def.p_const)
1662 sz_extra += elem_size;
1663
1664 ctrl = kvzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
1665 if (ctrl == NULL) {
1666 handler_set_err(hdl, -ENOMEM);
1667 return NULL;
1668 }
1669
1670 INIT_LIST_HEAD(&ctrl->node);
1671 INIT_LIST_HEAD(&ctrl->ev_subs);
1672 ctrl->handler = hdl;
1673 ctrl->ops = ops;
1674 ctrl->type_ops = type_ops ? type_ops : &std_type_ops;
1675 ctrl->id = id;
1676 ctrl->name = name;
1677 ctrl->type = type;
1678 ctrl->flags = flags;
1679 ctrl->minimum = min;
1680 ctrl->maximum = max;
1681 ctrl->step = step;
1682 ctrl->default_value = def;
1683 ctrl->is_string = !is_array && type == V4L2_CTRL_TYPE_STRING;
1684 ctrl->is_ptr = is_array || type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string;
1685 ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64;
1686 ctrl->is_array = is_array;
fb582cba 1687 ctrl->is_dyn_array = !!(flags & V4L2_CTRL_FLAG_DYNAMIC_ARRAY);
71c689dc 1688 ctrl->elems = elems;
fb582cba 1689 ctrl->new_elems = elems;
71c689dc
HV		 1690 ctrl->nr_of_dims = nr_of_dims;
1691 if (nr_of_dims)
1692 memcpy(ctrl->dims, dims, nr_of_dims * sizeof(dims[0]));
1693 ctrl->elem_size = elem_size;
1694 if (type == V4L2_CTRL_TYPE_MENU)
1695 ctrl->qmenu = qmenu;
1696 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
1697 ctrl->qmenu_int = qmenu_int;
1698 ctrl->priv = priv;
1699 ctrl->cur.val = ctrl->val = def;
1700 data = &ctrl[1];
1701
5f2c5c69
HV		 1702 if (ctrl->is_array) {
1703 ctrl->p_array_alloc_elems = elems;
1704 ctrl->p_array = kvzalloc(2 * elems * elem_size, GFP_KERNEL);
1705 if (!ctrl->p_array) {
fb582cba
HV		 1706 kvfree(ctrl);
1707 return NULL;
1708 }
5f2c5c69 1709 data = ctrl->p_array;
fb582cba
HV		 1710 }
1711
71c689dc
HV		 1712 if (!ctrl->is_int) {
1713 ctrl->p_new.p = data;
1714 ctrl->p_cur.p = data + tot_ctrl_size;
1715 } else {
1716 ctrl->p_new.p = &ctrl->val;
1717 ctrl->p_cur.p = &ctrl->cur.val;
1718 }
1719
1720 if (type >= V4L2_CTRL_COMPOUND_TYPES && p_def.p_const) {
5f2c5c69 1721 if (ctrl->is_array)
fb582cba
HV		 1722 ctrl->p_def.p = &ctrl[1];
1723 else
1724 ctrl->p_def.p = ctrl->p_cur.p + tot_ctrl_size;
71c689dc
HV		 1725 memcpy(ctrl->p_def.p, p_def.p_const, elem_size);
1726 }
1727
cd75981e 1728 ctrl->type_ops->init(ctrl, 0, ctrl->p_cur);
6b1aaa68 1729 cur_to_new(ctrl);
71c689dc
HV		 1730
1731 if (handler_new_ref(hdl, ctrl, NULL, false, false)) {
5f2c5c69 1732 kvfree(ctrl->p_array);
71c689dc
HV		 1733 kvfree(ctrl);
1734 return NULL;
1735 }
1736 mutex_lock(hdl->lock);
1737 list_add_tail(&ctrl->node, &hdl->ctrls);
1738 mutex_unlock(hdl->lock);
1739 return ctrl;
1740}
1741
1742struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
1743 const struct v4l2_ctrl_config *cfg, void *priv)
1744{
1745 bool is_menu;
1746 struct v4l2_ctrl *ctrl;
1747 const char *name = cfg->name;
1748 const char * const *qmenu = cfg->qmenu;
1749 const s64 *qmenu_int = cfg->qmenu_int;
1750 enum v4l2_ctrl_type type = cfg->type;
1751 u32 flags = cfg->flags;
1752 s64 min = cfg->min;
1753 s64 max = cfg->max;
1754 u64 step = cfg->step;
1755 s64 def = cfg->def;
1756
1757 if (name == NULL)
1758 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
1759 &def, &flags);
1760
1761 is_menu = (type == V4L2_CTRL_TYPE_MENU ||
1762 type == V4L2_CTRL_TYPE_INTEGER_MENU);
1763 if (is_menu)
1764 WARN_ON(step);
1765 else
1766 WARN_ON(cfg->menu_skip_mask);
1767 if (type == V4L2_CTRL_TYPE_MENU && !qmenu) {
1768 qmenu = v4l2_ctrl_get_menu(cfg->id);
1769 } else if (type == V4L2_CTRL_TYPE_INTEGER_MENU && !qmenu_int) {
1770 handler_set_err(hdl, -EINVAL);
1771 return NULL;
1772 }
1773
1774 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,
1775 type, min, max,
1776 is_menu ? cfg->menu_skip_mask : step, def,
1777 cfg->dims, cfg->elem_size,
1778 flags, qmenu, qmenu_int, cfg->p_def, priv);
1779 if (ctrl)
1780 ctrl->is_private = cfg->is_private;
1781 return ctrl;
1782}
1783EXPORT_SYMBOL(v4l2_ctrl_new_custom);
1784
1785/* Helper function for standard non-menu controls */
1786struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
1787 const struct v4l2_ctrl_ops *ops,
1788 u32 id, s64 min, s64 max, u64 step, s64 def)
1789{
1790 const char *name;
1791 enum v4l2_ctrl_type type;
1792 u32 flags;
1793
1794 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1795 if (type == V4L2_CTRL_TYPE_MENU ||
1796 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
1797 type >= V4L2_CTRL_COMPOUND_TYPES) {
1798 handler_set_err(hdl, -EINVAL);
1799 return NULL;
1800 }
1801 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
1802 min, max, step, def, NULL, 0,
1803 flags, NULL, NULL, ptr_null, NULL);
1804}
1805EXPORT_SYMBOL(v4l2_ctrl_new_std);
1806
1807/* Helper function for standard menu controls */
1808struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
1809 const struct v4l2_ctrl_ops *ops,
1810 u32 id, u8 _max, u64 mask, u8 _def)
1811{
1812 const char * const *qmenu = NULL;
1813 const s64 *qmenu_int = NULL;
1814 unsigned int qmenu_int_len = 0;
1815 const char *name;
1816 enum v4l2_ctrl_type type;
1817 s64 min;
1818 s64 max = _max;
1819 s64 def = _def;
1820 u64 step;
1821 u32 flags;
1822
1823 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1824
1825 if (type == V4L2_CTRL_TYPE_MENU)
1826 qmenu = v4l2_ctrl_get_menu(id);
1827 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
1828 qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len);
1829
b6bcdf76 1830 if ((!qmenu && !qmenu_int) || (qmenu_int && max >= qmenu_int_len)) {
71c689dc
HV		 1831 handler_set_err(hdl, -EINVAL);
1832 return NULL;
1833 }
1834 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
1835 0, max, mask, def, NULL, 0,
1836 flags, qmenu, qmenu_int, ptr_null, NULL);
1837}
1838EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
1839
1840/* Helper function for standard menu controls with driver defined menu */
1841struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
1842 const struct v4l2_ctrl_ops *ops, u32 id, u8 _max,
1843 u64 mask, u8 _def, const char * const *qmenu)
1844{
1845 enum v4l2_ctrl_type type;
1846 const char *name;
1847 u32 flags;
1848 u64 step;
1849 s64 min;
1850 s64 max = _max;
1851 s64 def = _def;
1852
1853 /* v4l2_ctrl_new_std_menu_items() should only be called for
1854 * standard controls without a standard menu.
1855 */
1856 if (v4l2_ctrl_get_menu(id)) {
1857 handler_set_err(hdl, -EINVAL);
1858 return NULL;
1859 }
1860
1861 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1862 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
1863 handler_set_err(hdl, -EINVAL);
1864 return NULL;
1865 }
1866 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
1867 0, max, mask, def, NULL, 0,
1868 flags, qmenu, NULL, ptr_null, NULL);
1869
1870}
1871EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
1872
1873/* Helper function for standard compound controls */
1874struct v4l2_ctrl *v4l2_ctrl_new_std_compound(struct v4l2_ctrl_handler *hdl,
1875 const struct v4l2_ctrl_ops *ops, u32 id,
1876 const union v4l2_ctrl_ptr p_def)
1877{
1878 const char *name;
1879 enum v4l2_ctrl_type type;
1880 u32 flags;
1881 s64 min, max, step, def;
1882
1883 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1884 if (type < V4L2_CTRL_COMPOUND_TYPES) {
1885 handler_set_err(hdl, -EINVAL);
1886 return NULL;
1887 }
1888 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
1889 min, max, step, def, NULL, 0,
1890 flags, NULL, NULL, p_def, NULL);
1891}
1892EXPORT_SYMBOL(v4l2_ctrl_new_std_compound);
1893
1894/* Helper function for standard integer menu controls */
1895struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
1896 const struct v4l2_ctrl_ops *ops,
1897 u32 id, u8 _max, u8 _def, const s64 *qmenu_int)
1898{
1899 const char *name;
1900 enum v4l2_ctrl_type type;
1901 s64 min;
1902 u64 step;
1903 s64 max = _max;
1904 s64 def = _def;
1905 u32 flags;
1906
1907 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1908 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
1909 handler_set_err(hdl, -EINVAL);
1910 return NULL;
1911 }
1912 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
1913 0, max, 0, def, NULL, 0,
1914 flags, NULL, qmenu_int, ptr_null, NULL);
1915}
1916EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
1917
1918/* Add the controls from another handler to our own. */
1919int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
1920 struct v4l2_ctrl_handler *add,
1921 bool (*filter)(const struct v4l2_ctrl *ctrl),
1922 bool from_other_dev)
1923{
1924 struct v4l2_ctrl_ref *ref;
1925 int ret = 0;
1926
1927 /* Do nothing if either handler is NULL or if they are the same */
1928 if (!hdl || !add || hdl == add)
1929 return 0;
1930 if (hdl->error)
1931 return hdl->error;
1932 mutex_lock(add->lock);
1933 list_for_each_entry(ref, &add->ctrl_refs, node) {
1934 struct v4l2_ctrl *ctrl = ref->ctrl;
1935
1936 /* Skip handler-private controls. */
1937 if (ctrl->is_private)
1938 continue;
1939 /* And control classes */
1940 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
1941 continue;
1942 /* Filter any unwanted controls */
1943 if (filter && !filter(ctrl))
1944 continue;
1945 ret = handler_new_ref(hdl, ctrl, NULL, from_other_dev, false);
1946 if (ret)
1947 break;
1948 }
1949 mutex_unlock(add->lock);
1950 return ret;
1951}
1952EXPORT_SYMBOL(v4l2_ctrl_add_handler);
1953
1954bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
1955{
1956 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
1957 return true;
1958 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_RX)
1959 return true;
1960 switch (ctrl->id) {
1961 case V4L2_CID_AUDIO_MUTE:
1962 case V4L2_CID_AUDIO_VOLUME:
1963 case V4L2_CID_AUDIO_BALANCE:
1964 case V4L2_CID_AUDIO_BASS:
1965 case V4L2_CID_AUDIO_TREBLE:
1966 case V4L2_CID_AUDIO_LOUDNESS:
1967 return true;
1968 default:
1969 break;
1970 }
1971 return false;
1972}
1973EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
1974
1975/* Cluster controls */
1976void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
1977{
1978 bool has_volatiles = false;
1979 int i;
1980
1981 /* The first control is the master control and it must not be NULL */
1982 if (WARN_ON(ncontrols == 0 || controls[0] == NULL))
1983 return;
1984
1985 for (i = 0; i < ncontrols; i++) {
1986 if (controls[i]) {
1987 controls[i]->cluster = controls;
1988 controls[i]->ncontrols = ncontrols;
1989 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
1990 has_volatiles = true;
1991 }
1992 }
1993 controls[0]->has_volatiles = has_volatiles;
1994}
1995EXPORT_SYMBOL(v4l2_ctrl_cluster);
1996
1997void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
1998 u8 manual_val, bool set_volatile)
1999{
2000 struct v4l2_ctrl *master = controls[0];
2001 u32 flag = 0;
2002 int i;
2003
2004 v4l2_ctrl_cluster(ncontrols, controls);
2005 WARN_ON(ncontrols <= 1);
2006 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
2007 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
2008 master->is_auto = true;
2009 master->has_volatiles = set_volatile;
2010 master->manual_mode_value = manual_val;
2011 master->flags |= V4L2_CTRL_FLAG_UPDATE;
2012
2013 if (!is_cur_manual(master))
2014 flag = V4L2_CTRL_FLAG_INACTIVE |
2015 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
2016
2017 for (i = 1; i < ncontrols; i++)
2018 if (controls[i])
2019 controls[i]->flags |= flag;
2020}
2021EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
2022
2023/*
2024 * Obtain the current volatile values of an autocluster and mark them
2025 * as new.
2026 */
2027void update_from_auto_cluster(struct v4l2_ctrl *master)
2028{
2029 int i;
2030
2031 for (i = 1; i < master->ncontrols; i++)
2032 cur_to_new(master->cluster[i]);
2033 if (!call_op(master, g_volatile_ctrl))
2034 for (i = 1; i < master->ncontrols; i++)
2035 if (master->cluster[i])
2036 master->cluster[i]->is_new = 1;
2037}
2038
2039/*
2040 * Return non-zero if one or more of the controls in the cluster has a new
2041 * value that differs from the current value.
2042 */
2043static int cluster_changed(struct v4l2_ctrl *master)
2044{
2045 bool changed = false;
71c689dc
HV		 2046 int i;
2047
2048 for (i = 0; i < master->ncontrols; i++) {
2049 struct v4l2_ctrl *ctrl = master->cluster[i];
2050 bool ctrl_changed = false;
2051
2052 if (!ctrl)
2053 continue;
2054
2055 if (ctrl->flags & V4L2_CTRL_FLAG_EXECUTE_ON_WRITE) {
2056 changed = true;
2057 ctrl_changed = true;
2058 }
2059
2060 /*
2061 * Set has_changed to false to avoid generating
2062 * the event V4L2_EVENT_CTRL_CH_VALUE
2063 */
2064 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
2065 ctrl->has_changed = false;
2066 continue;
2067 }
2068
fb582cba
HV		 2069 if (ctrl->elems != ctrl->new_elems)
2070 ctrl_changed = true;
6b1aaa68
HV		 2071 if (!ctrl_changed)
2072 ctrl_changed = !ctrl->type_ops->equal(ctrl,
cd75981e 2073 ctrl->p_cur, ctrl->p_new);
71c689dc
HV		 2074 ctrl->has_changed = ctrl_changed;
2075 changed |= ctrl->has_changed;
2076 }
2077 return changed;
2078}
2079
2080/*
2081 * Core function that calls try/s_ctrl and ensures that the new value is
2082 * copied to the current value on a set.
2083 * Must be called with ctrl->handler->lock held.
2084 */
2085int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
2086 bool set, u32 ch_flags)
2087{
2088 bool update_flag;
2089 int ret;
2090 int i;
2091
2092 /*
2093 * Go through the cluster and either validate the new value or
2094 * (if no new value was set), copy the current value to the new
2095 * value, ensuring a consistent view for the control ops when
2096 * called.
2097 */
2098 for (i = 0; i < master->ncontrols; i++) {
2099 struct v4l2_ctrl *ctrl = master->cluster[i];
2100
2101 if (!ctrl)
2102 continue;
2103
2104 if (!ctrl->is_new) {
2105 cur_to_new(ctrl);
2106 continue;
2107 }
2108 /*
2109 * Check again: it may have changed since the
2110 * previous check in try_or_set_ext_ctrls().
2111 */
2112 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
2113 return -EBUSY;
2114 }
2115
2116 ret = call_op(master, try_ctrl);
2117
2118 /* Don't set if there is no change */
2119 if (ret || !set || !cluster_changed(master))
2120 return ret;
2121 ret = call_op(master, s_ctrl);
2122 if (ret)
2123 return ret;
2124
2125 /* If OK, then make the new values permanent. */
2126 update_flag = is_cur_manual(master) != is_new_manual(master);
2127
2128 for (i = 0; i < master->ncontrols; i++) {
2129 /*
2130 * If we switch from auto to manual mode, and this cluster
2131 * contains volatile controls, then all non-master controls
2132 * have to be marked as changed. The 'new' value contains
2133 * the volatile value (obtained by update_from_auto_cluster),
2134 * which now has to become the current value.
2135 */
2136 if (i && update_flag && is_new_manual(master) &&
2137 master->has_volatiles && master->cluster[i])
2138 master->cluster[i]->has_changed = true;
2139
2140 new_to_cur(fh, master->cluster[i], ch_flags |
2141 ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
2142 }
2143 return 0;
2144}
2145
2146/* Activate/deactivate a control. */
2147void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
2148{
2149 /* invert since the actual flag is called 'inactive' */
2150 bool inactive = !active;
2151 bool old;
2152
2153 if (ctrl == NULL)
2154 return;
2155
2156 if (inactive)
2157 /* set V4L2_CTRL_FLAG_INACTIVE */
2158 old = test_and_set_bit(4, &ctrl->flags);
2159 else
2160 /* clear V4L2_CTRL_FLAG_INACTIVE */
2161 old = test_and_clear_bit(4, &ctrl->flags);
2162 if (old != inactive)
2163 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
2164}
2165EXPORT_SYMBOL(v4l2_ctrl_activate);
2166
2167void __v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
2168{
2169 bool old;
2170
2171 if (ctrl == NULL)
2172 return;
2173
2174 lockdep_assert_held(ctrl->handler->lock);
2175
2176 if (grabbed)
2177 /* set V4L2_CTRL_FLAG_GRABBED */
2178 old = test_and_set_bit(1, &ctrl->flags);
2179 else
2180 /* clear V4L2_CTRL_FLAG_GRABBED */
2181 old = test_and_clear_bit(1, &ctrl->flags);
2182 if (old != grabbed)
2183 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
2184}
2185EXPORT_SYMBOL(__v4l2_ctrl_grab);
2186
2187/* Call s_ctrl for all controls owned by the handler */
2188int __v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
2189{
2190 struct v4l2_ctrl *ctrl;
2191 int ret = 0;
2192
2193 if (hdl == NULL)
2194 return 0;
2195
2196 lockdep_assert_held(hdl->lock);
2197
2198 list_for_each_entry(ctrl, &hdl->ctrls, node)
2199 ctrl->done = false;
2200
2201 list_for_each_entry(ctrl, &hdl->ctrls, node) {
2202 struct v4l2_ctrl *master = ctrl->cluster[0];
2203 int i;
2204
2205 /* Skip if this control was already handled by a cluster. */
2206 /* Skip button controls and read-only controls. */
2207 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
2208 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
2209 continue;
2210
2211 for (i = 0; i < master->ncontrols; i++) {
2212 if (master->cluster[i]) {
2213 cur_to_new(master->cluster[i]);
2214 master->cluster[i]->is_new = 1;
2215 master->cluster[i]->done = true;
2216 }
2217 }
2218 ret = call_op(master, s_ctrl);
2219 if (ret)
2220 break;
2221 }
2222
2223 return ret;
2224}
2225EXPORT_SYMBOL_GPL(__v4l2_ctrl_handler_setup);
2226
2227int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
2228{
2229 int ret;
2230
2231 if (hdl == NULL)
2232 return 0;
2233
2234 mutex_lock(hdl->lock);
2235 ret = __v4l2_ctrl_handler_setup(hdl);
2236 mutex_unlock(hdl->lock);
2237
2238 return ret;
2239}
2240EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
2241
2242/* Log the control name and value */
2243static void log_ctrl(const struct v4l2_ctrl *ctrl,
2244 const char *prefix, const char *colon)
2245{
2246 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
2247 return;
2248 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2249 return;
2250
2251 pr_info("%s%s%s: ", prefix, colon, ctrl->name);
2252
2253 ctrl->type_ops->log(ctrl);
2254
2255 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
2256 V4L2_CTRL_FLAG_GRABBED |
2257 V4L2_CTRL_FLAG_VOLATILE)) {
2258 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
2259 pr_cont(" inactive");
2260 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
2261 pr_cont(" grabbed");
2262 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
2263 pr_cont(" volatile");
2264 }
2265 pr_cont("\n");
2266}
2267
2268/* Log all controls owned by the handler */
2269void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
2270 const char *prefix)
2271{
2272 struct v4l2_ctrl *ctrl;
2273 const char *colon = "";
2274 int len;
2275
2276 if (!hdl)
2277 return;
2278 if (!prefix)
2279 prefix = "";
2280 len = strlen(prefix);
2281 if (len && prefix[len - 1] != ' ')
2282 colon = ": ";
2283 mutex_lock(hdl->lock);
2284 list_for_each_entry(ctrl, &hdl->ctrls, node)
2285 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
2286 log_ctrl(ctrl, prefix, colon);
2287 mutex_unlock(hdl->lock);
2288}
2289EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
2290
2291int v4l2_ctrl_new_fwnode_properties(struct v4l2_ctrl_handler *hdl,
2292 const struct v4l2_ctrl_ops *ctrl_ops,
2293 const struct v4l2_fwnode_device_properties *p)
2294{
2295 if (p->orientation != V4L2_FWNODE_PROPERTY_UNSET) {
2296 u32 orientation_ctrl;
2297
2298 switch (p->orientation) {
2299 case V4L2_FWNODE_ORIENTATION_FRONT:
2300 orientation_ctrl = V4L2_CAMERA_ORIENTATION_FRONT;
2301 break;
2302 case V4L2_FWNODE_ORIENTATION_BACK:
2303 orientation_ctrl = V4L2_CAMERA_ORIENTATION_BACK;
2304 break;
2305 case V4L2_FWNODE_ORIENTATION_EXTERNAL:
2306 orientation_ctrl = V4L2_CAMERA_ORIENTATION_EXTERNAL;
2307 break;
2308 default:
2309 return -EINVAL;
2310 }
2311 if (!v4l2_ctrl_new_std_menu(hdl, ctrl_ops,
2312 V4L2_CID_CAMERA_ORIENTATION,
2313 V4L2_CAMERA_ORIENTATION_EXTERNAL, 0,
2314 orientation_ctrl))
2315 return hdl->error;
2316 }
2317
2318 if (p->rotation != V4L2_FWNODE_PROPERTY_UNSET) {
2319 if (!v4l2_ctrl_new_std(hdl, ctrl_ops,
2320 V4L2_CID_CAMERA_SENSOR_ROTATION,
2321 p->rotation, p->rotation, 1,
2322 p->rotation))
2323 return hdl->error;
2324 }
2325
2326 return hdl->error;
2327}
2328EXPORT_SYMBOL(v4l2_ctrl_new_fwnode_properties);
Linux 6.x block layer and io_uring tree(s)