summaryrefslogtreecommitdiffstats
path: root/drivers/media/i2c/imx214.c
blob: 2f9c8582f9401a2564688f88ef45f526c1a2a587 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
// SPDX-License-Identifier: GPL-2.0
/*
 * imx214.c - imx214 sensor driver
 *
 * Copyright 2018 Qtechnology A/S
 *
 * Ricardo Ribalda <ribalda@kernel.org>
 */
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <media/media-entity.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>

#define IMX214_DEFAULT_CLK_FREQ	24000000
#define IMX214_DEFAULT_LINK_FREQ 480000000
#define IMX214_DEFAULT_PIXEL_RATE ((IMX214_DEFAULT_LINK_FREQ * 8LL) / 10)
#define IMX214_FPS 30
#define IMX214_MBUS_CODE MEDIA_BUS_FMT_SRGGB10_1X10

static const char * const imx214_supply_name[] = {
	"vdda",
	"vddd",
	"vdddo",
};

#define IMX214_NUM_SUPPLIES ARRAY_SIZE(imx214_supply_name)

struct imx214 {
	struct device *dev;
	struct clk *xclk;
	struct regmap *regmap;

	struct v4l2_subdev sd;
	struct media_pad pad;
	struct v4l2_mbus_framefmt fmt;
	struct v4l2_rect crop;

	struct v4l2_ctrl_handler ctrls;
	struct v4l2_ctrl *pixel_rate;
	struct v4l2_ctrl *link_freq;
	struct v4l2_ctrl *exposure;
	struct v4l2_ctrl *unit_size;

	struct regulator_bulk_data	supplies[IMX214_NUM_SUPPLIES];

	struct gpio_desc *enable_gpio;

	/*
	 * Serialize control access, get/set format, get selection
	 * and start streaming.
	 */
	struct mutex mutex;

	bool streaming;
};

struct reg_8 {
	u16 addr;
	u8 val;
};

enum {
	IMX214_TABLE_WAIT_MS = 0,
	IMX214_TABLE_END,
	IMX214_MAX_RETRIES,
	IMX214_WAIT_MS
};

/*From imx214_mode_tbls.h*/
static const struct reg_8 mode_4096x2304[] = {
	{0x0114, 0x03},
	{0x0220, 0x00},
	{0x0221, 0x11},
	{0x0222, 0x01},
	{0x0340, 0x0C},
	{0x0341, 0x7A},
	{0x0342, 0x13},
	{0x0343, 0x90},
	{0x0344, 0x00},
	{0x0345, 0x38},
	{0x0346, 0x01},
	{0x0347, 0x98},
	{0x0348, 0x10},
	{0x0349, 0x37},
	{0x034A, 0x0A},
	{0x034B, 0x97},
	{0x0381, 0x01},
	{0x0383, 0x01},
	{0x0385, 0x01},
	{0x0387, 0x01},
	{0x0900, 0x00},
	{0x0901, 0x00},
	{0x0902, 0x00},
	{0x3000, 0x35},
	{0x3054, 0x01},
	{0x305C, 0x11},

	{0x0112, 0x0A},
	{0x0113, 0x0A},
	{0x034C, 0x10},
	{0x034D, 0x00},
	{0x034E, 0x09},
	{0x034F, 0x00},
	{0x0401, 0x00},
	{0x0404, 0x00},
	{0x0405, 0x10},
	{0x0408, 0x00},
	{0x0409, 0x00},
	{0x040A, 0x00},
	{0x040B, 0x00},
	{0x040C, 0x10},
	{0x040D, 0x00},
	{0x040E, 0x09},
	{0x040F, 0x00},

	{0x0301, 0x05},
	{0x0303, 0x02},
	{0x0305, 0x03},
	{0x0306, 0x00},
	{0x0307, 0x96},
	{0x0309, 0x0A},
	{0x030B, 0x01},
	{0x0310, 0x00},

	{0x0820, 0x12},
	{0x0821, 0xC0},
	{0x0822, 0x00},
	{0x0823, 0x00},

	{0x3A03, 0x09},
	{0x3A04, 0x50},
	{0x3A05, 0x01},

	{0x0B06, 0x01},
	{0x30A2, 0x00},

	{0x30B4, 0x00},

	{0x3A02, 0xFF},

	{0x3011, 0x00},
	{0x3013, 0x01},

	{0x0202, 0x0C},
	{0x0203, 0x70},
	{0x0224, 0x01},
	{0x0225, 0xF4},

	{0x0204, 0x00},
	{0x0205, 0x00},
	{0x020E, 0x01},
	{0x020F, 0x00},
	{0x0210, 0x01},
	{0x0211, 0x00},
	{0x0212, 0x01},
	{0x0213, 0x00},
	{0x0214, 0x01},
	{0x0215, 0x00},
	{0x0216, 0x00},
	{0x0217, 0x00},

	{0x4170, 0x00},
	{0x4171, 0x10},
	{0x4176, 0x00},
	{0x4177, 0x3C},
	{0xAE20, 0x04},
	{0xAE21, 0x5C},

	{IMX214_TABLE_WAIT_MS, 10},
	{0x0138, 0x01},
	{IMX214_TABLE_END, 0x00}
};

static const struct reg_8 mode_1920x1080[] = {
	{0x0114, 0x03},
	{0x0220, 0x00},
	{0x0221, 0x11},
	{0x0222, 0x01},
	{0x0340, 0x0C},
	{0x0341, 0x7A},
	{0x0342, 0x13},
	{0x0343, 0x90},
	{0x0344, 0x04},
	{0x0345, 0x78},
	{0x0346, 0x03},
	{0x0347, 0xFC},
	{0x0348, 0x0B},
	{0x0349, 0xF7},
	{0x034A, 0x08},
	{0x034B, 0x33},
	{0x0381, 0x01},
	{0x0383, 0x01},
	{0x0385, 0x01},
	{0x0387, 0x01},
	{0x0900, 0x00},
	{0x0901, 0x00},
	{0x0902, 0x00},
	{0x3000, 0x35},
	{0x3054, 0x01},
	{0x305C, 0x11},

	{0x0112, 0x0A},
	{0x0113, 0x0A},
	{0x034C, 0x07},
	{0x034D, 0x80},
	{0x034E, 0x04},
	{0x034F, 0x38},
	{0x0401, 0x00},
	{0x0404, 0x00},
	{0x0405, 0x10},
	{0x0408, 0x00},
	{0x0409, 0x00},
	{0x040A, 0x00},
	{0x040B, 0x00},
	{0x040C, 0x07},
	{0x040D, 0x80},
	{0x040E, 0x04},
	{0x040F, 0x38},

	{0x0301, 0x05},
	{0x0303, 0x02},
	{0x0305, 0x03},
	{0x0306, 0x00},
	{0x0307, 0x96},
	{0x0309, 0x0A},
	{0x030B, 0x01},
	{0x0310, 0x00},

	{0x0820, 0x12},
	{0x0821, 0xC0},
	{0x0822, 0x00},
	{0x0823, 0x00},

	{0x3A03, 0x04},
	{0x3A04, 0xF8},
	{0x3A05, 0x02},

	{0x0B06, 0x01},
	{0x30A2, 0x00},

	{0x30B4, 0x00},

	{0x3A02, 0xFF},

	{0x3011, 0x00},
	{0x3013, 0x01},

	{0x0202, 0x0C},
	{0x0203, 0x70},
	{0x0224, 0x01},
	{0x0225, 0xF4},

	{0x0204, 0x00},
	{0x0205, 0x00},
	{0x020E, 0x01},
	{0x020F, 0x00},
	{0x0210, 0x01},
	{0x0211, 0x00},
	{0x0212, 0x01},
	{0x0213, 0x00},
	{0x0214, 0x01},
	{0x0215, 0x00},
	{0x0216, 0x00},
	{0x0217, 0x00},

	{0x4170, 0x00},
	{0x4171, 0x10},
	{0x4176, 0x00},
	{0x4177, 0x3C},
	{0xAE20, 0x04},
	{0xAE21, 0x5C},

	{IMX214_TABLE_WAIT_MS, 10},
	{0x0138, 0x01},
	{IMX214_TABLE_END, 0x00}
};

static const struct reg_8 mode_table_common[] = {
	/* software reset */

	/* software standby settings */
	{0x0100, 0x00},

	/* ATR setting */
	{0x9300, 0x02},

	/* external clock setting */
	{0x0136, 0x18},
	{0x0137, 0x00},

	/* global setting */
	/* basic config */
	{0x0101, 0x00},
	{0x0105, 0x01},
	{0x0106, 0x01},
	{0x4550, 0x02},
	{0x4601, 0x00},
	{0x4642, 0x05},
	{0x6227, 0x11},
	{0x6276, 0x00},
	{0x900E, 0x06},
	{0xA802, 0x90},
	{0xA803, 0x11},
	{0xA804, 0x62},
	{0xA805, 0x77},
	{0xA806, 0xAE},
	{0xA807, 0x34},
	{0xA808, 0xAE},
	{0xA809, 0x35},
	{0xA80A, 0x62},
	{0xA80B, 0x83},
	{0xAE33, 0x00},

	/* analog setting */
	{0x4174, 0x00},
	{0x4175, 0x11},
	{0x4612, 0x29},
	{0x461B, 0x12},
	{0x461F, 0x06},
	{0x4635, 0x07},
	{0x4637, 0x30},
	{0x463F, 0x18},
	{0x4641, 0x0D},
	{0x465B, 0x12},
	{0x465F, 0x11},
	{0x4663, 0x11},
	{0x4667, 0x0F},
	{0x466F, 0x0F},
	{0x470E, 0x09},
	{0x4909, 0xAB},
	{0x490B, 0x95},
	{0x4915, 0x5D},
	{0x4A5F, 0xFF},
	{0x4A61, 0xFF},
	{0x4A73, 0x62},
	{0x4A85, 0x00},
	{0x4A87, 0xFF},

	/* embedded data */
	{0x5041, 0x04},
	{0x583C, 0x04},
	{0x620E, 0x04},
	{0x6EB2, 0x01},
	{0x6EB3, 0x00},
	{0x9300, 0x02},

	/* imagequality */
	/* HDR setting */
	{0x3001, 0x07},
	{0x6D12, 0x3F},
	{0x6D13, 0xFF},
	{0x9344, 0x03},
	{0x9706, 0x10},
	{0x9707, 0x03},
	{0x9708, 0x03},
	{0x9E04, 0x01},
	{0x9E05, 0x00},
	{0x9E0C, 0x01},
	{0x9E0D, 0x02},
	{0x9E24, 0x00},
	{0x9E25, 0x8C},
	{0x9E26, 0x00},
	{0x9E27, 0x94},
	{0x9E28, 0x00},
	{0x9E29, 0x96},

	/* CNR parameter setting */
	{0x69DB, 0x01},

	/* Moire reduction */
	{0x6957, 0x01},

	/* image enhancement */
	{0x6987, 0x17},
	{0x698A, 0x03},
	{0x698B, 0x03},

	/* white balanace */
	{0x0B8E, 0x01},
	{0x0B8F, 0x00},
	{0x0B90, 0x01},
	{0x0B91, 0x00},
	{0x0B92, 0x01},
	{0x0B93, 0x00},
	{0x0B94, 0x01},
	{0x0B95, 0x00},

	/* ATR setting */
	{0x6E50, 0x00},
	{0x6E51, 0x32},
	{0x9340, 0x00},
	{0x9341, 0x3C},
	{0x9342, 0x03},
	{0x9343, 0xFF},
	{IMX214_TABLE_END, 0x00}
};

/*
 * Declare modes in order, from biggest
 * to smallest height.
 */
static const struct imx214_mode {
	u32 width;
	u32 height;
	const struct reg_8 *reg_table;
} imx214_modes[] = {
	{
		.width = 4096,
		.height = 2304,
		.reg_table = mode_4096x2304,
	},
	{
		.width = 1920,
		.height = 1080,
		.reg_table = mode_1920x1080,
	},
};

static inline struct imx214 *to_imx214(struct v4l2_subdev *sd)
{
	return container_of(sd, struct imx214, sd);
}

static int __maybe_unused imx214_power_on(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct imx214 *imx214 = to_imx214(sd);
	int ret;

	ret = regulator_bulk_enable(IMX214_NUM_SUPPLIES, imx214->supplies);
	if (ret < 0) {
		dev_err(imx214->dev, "failed to enable regulators: %d\n", ret);
		return ret;
	}

	usleep_range(2000, 3000);

	ret = clk_prepare_enable(imx214->xclk);
	if (ret < 0) {
		regulator_bulk_disable(IMX214_NUM_SUPPLIES, imx214->supplies);
		dev_err(imx214->dev, "clk prepare enable failed\n");
		return ret;
	}

	gpiod_set_value_cansleep(imx214->enable_gpio, 1);
	usleep_range(12000, 15000);

	return 0;
}

static int __maybe_unused imx214_power_off(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct imx214 *imx214 = to_imx214(sd);

	gpiod_set_value_cansleep(imx214->enable_gpio, 0);

	clk_disable_unprepare(imx214->xclk);

	regulator_bulk_disable(IMX214_NUM_SUPPLIES, imx214->supplies);
	usleep_range(10, 20);

	return 0;
}

static int imx214_enum_mbus_code(struct v4l2_subdev *sd,
				 struct v4l2_subdev_state *sd_state,
				 struct v4l2_subdev_mbus_code_enum *code)
{
	if (code->index > 0)
		return -EINVAL;

	code->code = IMX214_MBUS_CODE;

	return 0;
}

static int imx214_enum_frame_size(struct v4l2_subdev *subdev,
				  struct v4l2_subdev_state *sd_state,
				  struct v4l2_subdev_frame_size_enum *fse)
{
	if (fse->code != IMX214_MBUS_CODE)
		return -EINVAL;

	if (fse->index >= ARRAY_SIZE(imx214_modes))
		return -EINVAL;

	fse->min_width = fse->max_width = imx214_modes[fse->index].width;
	fse->min_height = fse->max_height = imx214_modes[fse->index].height;

	return 0;
}

#ifdef CONFIG_VIDEO_ADV_DEBUG
static int imx214_s_register(struct v4l2_subdev *subdev,
			     const struct v4l2_dbg_register *reg)
{
	struct imx214 *imx214 = container_of(subdev, struct imx214, sd);

	return regmap_write(imx214->regmap, reg->reg, reg->val);
}

static int imx214_g_register(struct v4l2_subdev *subdev,
			     struct v4l2_dbg_register *reg)
{
	struct imx214 *imx214 = container_of(subdev, struct imx214, sd);
	unsigned int aux;
	int ret;

	reg->size = 1;
	ret = regmap_read(imx214->regmap, reg->reg, &aux);
	reg->val = aux;

	return ret;
}
#endif

static const struct v4l2_subdev_core_ops imx214_core_ops = {
#ifdef CONFIG_VIDEO_ADV_DEBUG
	.g_register = imx214_g_register,
	.s_register = imx214_s_register,
#endif
};

static struct v4l2_mbus_framefmt *
__imx214_get_pad_format(struct imx214 *imx214,
			struct v4l2_subdev_state *sd_state,
			unsigned int pad,
			enum v4l2_subdev_format_whence which)
{
	switch (which) {
	case V4L2_SUBDEV_FORMAT_TRY:
		return v4l2_subdev_get_try_format(&imx214->sd, sd_state, pad);
	case V4L2_SUBDEV_FORMAT_ACTIVE:
		return &imx214->fmt;
	default:
		return NULL;
	}
}

static int imx214_get_format(struct v4l2_subdev *sd,
			     struct v4l2_subdev_state *sd_state,
			     struct v4l2_subdev_format *format)
{
	struct imx214 *imx214 = to_imx214(sd);

	mutex_lock(&imx214->mutex);
	format->format = *__imx214_get_pad_format(imx214, sd_state,
						  format->pad,
						  format->which);
	mutex_unlock(&imx214->mutex);

	return 0;
}

static struct v4l2_rect *
__imx214_get_pad_crop(struct imx214 *imx214,
		      struct v4l2_subdev_state *sd_state,
		      unsigned int pad, enum v4l2_subdev_format_whence which)
{
	switch (which) {
	case V4L2_SUBDEV_FORMAT_TRY:
		return v4l2_subdev_get_try_crop(&imx214->sd, sd_state, pad);
	case V4L2_SUBDEV_FORMAT_ACTIVE:
		return &imx214->crop;
	default:
		return NULL;
	}
}

static int imx214_set_format(struct v4l2_subdev *sd,
			     struct v4l2_subdev_state *sd_state,
			     struct v4l2_subdev_format *format)
{
	struct imx214 *imx214 = to_imx214(sd);
	struct v4l2_mbus_framefmt *__format;
	struct v4l2_rect *__crop;
	const struct imx214_mode *mode;

	mutex_lock(&imx214->mutex);

	__crop = __imx214_get_pad_crop(imx214, sd_state, format->pad,
				       format->which);

	mode = v4l2_find_nearest_size(imx214_modes,
				      ARRAY_SIZE(imx214_modes), width, height,
				      format->format.width,
				      format->format.height);

	__crop->width = mode->width;
	__crop->height = mode->height;

	__format = __imx214_get_pad_format(imx214, sd_state, format->pad,
					   format->which);
	__format->width = __crop->width;
	__format->height = __crop->height;
	__format->code = IMX214_MBUS_CODE;
	__format->field = V4L2_FIELD_NONE;
	__format->colorspace = V4L2_COLORSPACE_SRGB;
	__format->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(__format->colorspace);
	__format->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
				__format->colorspace, __format->ycbcr_enc);
	__format->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(__format->colorspace);

	format->format = *__format;

	mutex_unlock(&imx214->mutex);

	return 0;
}

static int imx214_get_selection(struct v4l2_subdev *sd,
				struct v4l2_subdev_state *sd_state,
				struct v4l2_subdev_selection *sel)
{
	struct imx214 *imx214 = to_imx214(sd);

	if (sel->target != V4L2_SEL_TGT_CROP)
		return -EINVAL;

	mutex_lock(&imx214->mutex);
	sel->r = *__imx214_get_pad_crop(imx214, sd_state, sel->pad,
					sel->which);
	mutex_unlock(&imx214->mutex);
	return 0;
}

static int imx214_entity_init_cfg(struct v4l2_subdev *subdev,
				  struct v4l2_subdev_state *sd_state)
{
	struct v4l2_subdev_format fmt = { };

	fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
	fmt.format.width = imx214_modes[0].width;
	fmt.format.height = imx214_modes[0].height;

	imx214_set_format(subdev, sd_state, &fmt);

	return 0;
}

static int imx214_set_ctrl(struct v4l2_ctrl *ctrl)
{
	struct imx214 *imx214 = container_of(ctrl->handler,
					     struct imx214, ctrls);
	u8 vals[2];
	int ret;

	/*
	 * Applying V4L2 control value only happens
	 * when power is up for streaming
	 */
	if (!pm_runtime_get_if_in_use(imx214->dev))
		return 0;

	switch (ctrl->id) {
	case V4L2_CID_EXPOSURE:
		vals[1] = ctrl->val;
		vals[0] = ctrl->val >> 8;
		ret = regmap_bulk_write(imx214->regmap, 0x202, vals, 2);
		if (ret < 0)
			dev_err(imx214->dev, "Error %d\n", ret);
		ret = 0;
		break;

	default:
		ret = -EINVAL;
	}

	pm_runtime_put(imx214->dev);

	return ret;
}

static const struct v4l2_ctrl_ops imx214_ctrl_ops = {
	.s_ctrl = imx214_set_ctrl,
};

#define MAX_CMD 4
static int imx214_write_table(struct imx214 *imx214,
			      const struct reg_8 table[])
{
	u8 vals[MAX_CMD];
	int i;
	int ret;

	for (; table->addr != IMX214_TABLE_END ; table++) {
		if (table->addr == IMX214_TABLE_WAIT_MS) {
			usleep_range(table->val * 1000,
				     table->val * 1000 + 500);
			continue;
		}

		for (i = 0; i < MAX_CMD; i++) {
			if (table[i].addr != (table[0].addr + i))
				break;
			vals[i] = table[i].val;
		}

		ret = regmap_bulk_write(imx214->regmap, table->addr, vals, i);

		if (ret) {
			dev_err(imx214->dev, "write_table error: %d\n", ret);
			return ret;
		}

		table += i - 1;
	}

	return 0;
}

static int imx214_start_streaming(struct imx214 *imx214)
{
	const struct imx214_mode *mode;
	int ret;

	mutex_lock(&imx214->mutex);
	ret = imx214_write_table(imx214, mode_table_common);
	if (ret < 0) {
		dev_err(imx214->dev, "could not sent common table %d\n", ret);
		goto error;
	}

	mode = v4l2_find_nearest_size(imx214_modes,
				ARRAY_SIZE(imx214_modes), width, height,
				imx214->fmt.width, imx214->fmt.height);
	ret = imx214_write_table(imx214, mode->reg_table);
	if (ret < 0) {
		dev_err(imx214->dev, "could not sent mode table %d\n", ret);
		goto error;
	}
	ret = __v4l2_ctrl_handler_setup(&imx214->ctrls);
	if (ret < 0) {
		dev_err(imx214->dev, "could not sync v4l2 controls\n");
		goto error;
	}
	ret = regmap_write(imx214->regmap, 0x100, 1);
	if (ret < 0) {
		dev_err(imx214->dev, "could not sent start table %d\n", ret);
		goto error;
	}

	mutex_unlock(&imx214->mutex);
	return 0;

error:
	mutex_unlock(&imx214->mutex);
	return ret;
}

static int imx214_stop_streaming(struct imx214 *imx214)
{
	int ret;

	ret = regmap_write(imx214->regmap, 0x100, 0);
	if (ret < 0)
		dev_err(imx214->dev, "could not sent stop table %d\n",	ret);

	return ret;
}

static int imx214_s_stream(struct v4l2_subdev *subdev, int enable)
{
	struct imx214 *imx214 = to_imx214(subdev);
	int ret;

	if (imx214->streaming == enable)
		return 0;

	if (enable) {
		ret = pm_runtime_resume_and_get(imx214->dev);
		if (ret < 0)
			return ret;

		ret = imx214_start_streaming(imx214);
		if (ret < 0)
			goto err_rpm_put;
	} else {
		ret = imx214_stop_streaming(imx214);
		if (ret < 0)
			goto err_rpm_put;
		pm_runtime_put(imx214->dev);
	}

	imx214->streaming = enable;
	return 0;

err_rpm_put:
	pm_runtime_put(imx214->dev);
	return ret;
}

static int imx214_g_frame_interval(struct v4l2_subdev *subdev,
				   struct v4l2_subdev_frame_interval *fival)
{
	fival->interval.numerator = 1;
	fival->interval.denominator = IMX214_FPS;

	return 0;
}

static int imx214_enum_frame_interval(struct v4l2_subdev *subdev,
				struct v4l2_subdev_state *sd_state,
				struct v4l2_subdev_frame_interval_enum *fie)
{
	const struct imx214_mode *mode;

	if (fie->index != 0)
		return -EINVAL;

	mode = v4l2_find_nearest_size(imx214_modes,
				ARRAY_SIZE(imx214_modes), width, height,
				fie->width, fie->height);

	fie->code = IMX214_MBUS_CODE;
	fie->width = mode->width;
	fie->height = mode->height;
	fie->interval.numerator = 1;
	fie->interval.denominator = IMX214_FPS;

	return 0;
}

static const struct v4l2_subdev_video_ops imx214_video_ops = {
	.s_stream = imx214_s_stream,
	.g_frame_interval = imx214_g_frame_interval,
	.s_frame_interval = imx214_g_frame_interval,
};

static const struct v4l2_subdev_pad_ops imx214_subdev_pad_ops = {
	.enum_mbus_code = imx214_enum_mbus_code,
	.enum_frame_size = imx214_enum_frame_size,
	.enum_frame_interval = imx214_enum_frame_interval,
	.get_fmt = imx214_get_format,
	.set_fmt = imx214_set_format,
	.get_selection = imx214_get_selection,
	.init_cfg = imx214_entity_init_cfg,
};

static const struct v4l2_subdev_ops imx214_subdev_ops = {
	.core = &imx214_core_ops,
	.video = &imx214_video_ops,
	.pad = &imx214_subdev_pad_ops,
};

static const struct regmap_config sensor_regmap_config = {
	.reg_bits = 16,
	.val_bits = 8,
	.cache_type = REGCACHE_RBTREE,
};

static int imx214_get_regulators(struct device *dev, struct imx214 *imx214)
{
	unsigned int i;

	for (i = 0; i < IMX214_NUM_SUPPLIES; i++)
		imx214->supplies[i].supply = imx214_supply_name[i];

	return devm_regulator_bulk_get(dev, IMX214_NUM_SUPPLIES,
				       imx214->supplies);
}

static int imx214_parse_fwnode(struct device *dev)
{
	struct fwnode_handle *endpoint;
	struct v4l2_fwnode_endpoint bus_cfg = {
		.bus_type = V4L2_MBUS_CSI2_DPHY,
	};
	unsigned int i;
	int ret;

	endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
	if (!endpoint) {
		dev_err(dev, "endpoint node not found\n");
		return -EINVAL;
	}

	ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg);
	if (ret) {
		dev_err(dev, "parsing endpoint node failed\n");
		goto done;
	}

	for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
		if (bus_cfg.link_frequencies[i] == IMX214_DEFAULT_LINK_FREQ)
			break;

	if (i == bus_cfg.nr_of_link_frequencies) {
		dev_err(dev, "link-frequencies %d not supported, Please review your DT\n",
			IMX214_DEFAULT_LINK_FREQ);
		ret = -EINVAL;
		goto done;
	}

done:
	v4l2_fwnode_endpoint_free(&bus_cfg);
	fwnode_handle_put(endpoint);
	return ret;
}

static int __maybe_unused imx214_suspend(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct imx214 *imx214 = to_imx214(sd);

	if (imx214->streaming)
		imx214_stop_streaming(imx214);

	return 0;
}

static int __maybe_unused imx214_resume(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct imx214 *imx214 = to_imx214(sd);
	int ret;

	if (imx214->streaming) {
		ret = imx214_start_streaming(imx214);
		if (ret)
			goto error;
	}

	return 0;

error:
	imx214_stop_streaming(imx214);
	imx214->streaming = 0;
	return ret;
}

static int imx214_probe(struct i2c_client *client)
{
	struct device *dev = &client->dev;
	struct imx214 *imx214;
	static const s64 link_freq[] = {
		IMX214_DEFAULT_LINK_FREQ,
	};
	static const struct v4l2_area unit_size = {
		.width = 1120,
		.height = 1120,
	};
	int ret;

	ret = imx214_parse_fwnode(dev);
	if (ret)
		return ret;

	imx214 = devm_kzalloc(dev, sizeof(*imx214), GFP_KERNEL);
	if (!imx214)
		return -ENOMEM;

	imx214->dev = dev;

	imx214->xclk = devm_clk_get(dev, NULL);
	if (IS_ERR(imx214->xclk)) {
		dev_err(dev, "could not get xclk");
		return PTR_ERR(imx214->xclk);
	}

	ret = clk_set_rate(imx214->xclk, IMX214_DEFAULT_CLK_FREQ);
	if (ret) {
		dev_err(dev, "could not set xclk frequency\n");
		return ret;
	}

	ret = imx214_get_regulators(dev, imx214);
	if (ret < 0) {
		dev_err(dev, "cannot get regulators\n");
		return ret;
	}

	imx214->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
	if (IS_ERR(imx214->enable_gpio)) {
		dev_err(dev, "cannot get enable gpio\n");
		return PTR_ERR(imx214->enable_gpio);
	}

	imx214->regmap = devm_regmap_init_i2c(client, &sensor_regmap_config);
	if (IS_ERR(imx214->regmap)) {
		dev_err(dev, "regmap init failed\n");
		return PTR_ERR(imx214->regmap);
	}

	v4l2_i2c_subdev_init(&imx214->sd, client, &imx214_subdev_ops);

	/*
	 * Enable power initially, to avoid warnings
	 * from clk_disable on power_off
	 */
	imx214_power_on(imx214->dev);

	pm_runtime_set_active(imx214->dev);
	pm_runtime_enable(imx214->dev);
	pm_runtime_idle(imx214->dev);

	v4l2_ctrl_handler_init(&imx214->ctrls, 3);

	imx214->pixel_rate = v4l2_ctrl_new_std(&imx214->ctrls, NULL,
					       V4L2_CID_PIXEL_RATE, 0,
					       IMX214_DEFAULT_PIXEL_RATE, 1,
					       IMX214_DEFAULT_PIXEL_RATE);
	imx214->link_freq = v4l2_ctrl_new_int_menu(&imx214->ctrls, NULL,
						   V4L2_CID_LINK_FREQ,
						   ARRAY_SIZE(link_freq) - 1,
						   0, link_freq);
	if (imx214->link_freq)
		imx214->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;

	/*
	 * WARNING!
	 * Values obtained reverse engineering blobs and/or devices.
	 * Ranges and functionality might be wrong.
	 *
	 * Sony, please release some register set documentation for the
	 * device.
	 *
	 * Yours sincerely, Ricardo.
	 */
	imx214->exposure = v4l2_ctrl_new_std(&imx214->ctrls, &imx214_ctrl_ops,
					     V4L2_CID_EXPOSURE,
					     0, 3184, 1, 0x0c70);

	imx214->unit_size = v4l2_ctrl_new_std_compound(&imx214->ctrls,
				NULL,
				V4L2_CID_UNIT_CELL_SIZE,
				v4l2_ctrl_ptr_create((void *)&unit_size));
	ret = imx214->ctrls.error;
	if (ret) {
		dev_err(&client->dev, "%s control init failed (%d)\n",
			__func__, ret);
		goto free_ctrl;
	}

	imx214->sd.ctrl_handler = &imx214->ctrls;
	mutex_init(&imx214->mutex);
	imx214->ctrls.lock = &imx214->mutex;

	imx214->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
	imx214->pad.flags = MEDIA_PAD_FL_SOURCE;
	imx214->sd.dev = &client->dev;
	imx214->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;

	ret = media_entity_pads_init(&imx214->sd.entity, 1, &imx214->pad);
	if (ret < 0) {
		dev_err(dev, "could not register media entity\n");
		goto free_ctrl;
	}

	imx214_entity_init_cfg(&imx214->sd, NULL);

	ret = v4l2_async_register_subdev_sensor(&imx214->sd);
	if (ret < 0) {
		dev_err(dev, "could not register v4l2 device\n");
		goto free_entity;
	}

	return 0;

free_entity:
	media_entity_cleanup(&imx214->sd.entity);
free_ctrl:
	mutex_destroy(&imx214->mutex);
	v4l2_ctrl_handler_free(&imx214->ctrls);
	pm_runtime_disable(imx214->dev);

	return ret;
}

static void imx214_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct imx214 *imx214 = to_imx214(sd);

	v4l2_async_unregister_subdev(&imx214->sd);
	media_entity_cleanup(&imx214->sd.entity);
	v4l2_ctrl_handler_free(&imx214->ctrls);

	pm_runtime_disable(&client->dev);
	pm_runtime_set_suspended(&client->dev);

	mutex_destroy(&imx214->mutex);
}

static const struct of_device_id imx214_of_match[] = {
	{ .compatible = "sony,imx214" },
	{ }
};
MODULE_DEVICE_TABLE(of, imx214_of_match);

static const struct dev_pm_ops imx214_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(imx214_suspend, imx214_resume)
	SET_RUNTIME_PM_OPS(imx214_power_off, imx214_power_on, NULL)
};

static struct i2c_driver imx214_i2c_driver = {
	.driver = {
		.of_match_table = imx214_of_match,
		.pm = &imx214_pm_ops,
		.name  = "imx214",
	},
	.probe = imx214_probe,
	.remove = imx214_remove,
};

module_i2c_driver(imx214_i2c_driver);

MODULE_DESCRIPTION("Sony IMX214 Camera driver");
MODULE_AUTHOR("Ricardo Ribalda <ribalda@kernel.org>");
MODULE_LICENSE("GPL v2");