drivers/media/i2c/ov5640.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
   4  * Copyright (C) 2014-2017 Mentor Graphics Inc.
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/clk-provider.h>
   9 #include <linux/clkdev.h>
  10 #include <linux/ctype.h>
  11 #include <linux/delay.h>
  12 #include <linux/device.h>
  13 #include <linux/gpio/consumer.h>
  14 #include <linux/i2c.h>
  15 #include <linux/init.h>
  16 #include <linux/module.h>
  17 #include <linux/of_device.h>
  18 #include <linux/pm_runtime.h>
  19 #include <linux/regulator/consumer.h>
  20 #include <linux/slab.h>
  21 #include <linux/types.h>
  22 #include <media/v4l2-async.h>
  23 #include <media/v4l2-ctrls.h>
  24 #include <media/v4l2-device.h>
  25 #include <media/v4l2-event.h>
  26 #include <media/v4l2-fwnode.h>
  27 #include <media/v4l2-subdev.h>
  28
  29 /* min/typical/max system clock (xclk) frequencies */
  30 #define OV5640_XCLK_MIN  6000000
  31 #define OV5640_XCLK_MAX 54000000
  32
  33 #define OV5640_NATIVE_WIDTH             2624
  34 #define OV5640_NATIVE_HEIGHT            1964
  35 #define OV5640_PIXEL_ARRAY_TOP          14
  36 #define OV5640_PIXEL_ARRAY_LEFT         16
  37 #define OV5640_PIXEL_ARRAY_WIDTH        2592
  38 #define OV5640_PIXEL_ARRAY_HEIGHT       1944
  39
  40 /* FIXME: not documented. */
  41 #define OV5640_MIN_VBLANK       24
  42 #define OV5640_MAX_VTS          3375
  43
  44 #define OV5640_DEFAULT_SLAVE_ID 0x3c
  45
  46 #define OV5640_LINK_RATE_MAX            490000000U
  47
  48 #define OV5640_REG_SYS_RESET02          0x3002
  49 #define OV5640_REG_SYS_CLOCK_ENABLE02   0x3006
  50 #define OV5640_REG_SYS_CTRL0            0x3008
  51 #define OV5640_REG_SYS_CTRL0_SW_PWDN    0x42
  52 #define OV5640_REG_SYS_CTRL0_SW_PWUP    0x02
  53 #define OV5640_REG_SYS_CTRL0_SW_RST     0x82
  54 #define OV5640_REG_CHIP_ID              0x300a
  55 #define OV5640_REG_IO_MIPI_CTRL00       0x300e
  56 #define OV5640_REG_PAD_OUTPUT_ENABLE01  0x3017
  57 #define OV5640_REG_PAD_OUTPUT_ENABLE02  0x3018
  58 #define OV5640_REG_PAD_OUTPUT00         0x3019
  59 #define OV5640_REG_SYSTEM_CONTROL1      0x302e
  60 #define OV5640_REG_SC_PLL_CTRL0         0x3034
  61 #define OV5640_REG_SC_PLL_CTRL1         0x3035
  62 #define OV5640_REG_SC_PLL_CTRL2         0x3036
  63 #define OV5640_REG_SC_PLL_CTRL3         0x3037
  64 #define OV5640_REG_SLAVE_ID             0x3100
  65 #define OV5640_REG_SCCB_SYS_CTRL1       0x3103
  66 #define OV5640_REG_SYS_ROOT_DIVIDER     0x3108
  67 #define OV5640_REG_AWB_R_GAIN           0x3400
  68 #define OV5640_REG_AWB_G_GAIN           0x3402
  69 #define OV5640_REG_AWB_B_GAIN           0x3404
  70 #define OV5640_REG_AWB_MANUAL_CTRL      0x3406
  71 #define OV5640_REG_AEC_PK_EXPOSURE_HI   0x3500
  72 #define OV5640_REG_AEC_PK_EXPOSURE_MED  0x3501
  73 #define OV5640_REG_AEC_PK_EXPOSURE_LO   0x3502
  74 #define OV5640_REG_AEC_PK_MANUAL        0x3503
  75 #define OV5640_REG_AEC_PK_REAL_GAIN     0x350a
  76 #define OV5640_REG_AEC_PK_VTS           0x350c
  77 #define OV5640_REG_TIMING_HS            0x3800
  78 #define OV5640_REG_TIMING_VS            0x3802
  79 #define OV5640_REG_TIMING_HW            0x3804
  80 #define OV5640_REG_TIMING_VH            0x3806
  81 #define OV5640_REG_TIMING_DVPHO         0x3808
  82 #define OV5640_REG_TIMING_DVPVO         0x380a
  83 #define OV5640_REG_TIMING_HTS           0x380c
  84 #define OV5640_REG_TIMING_VTS           0x380e
  85 #define OV5640_REG_TIMING_HOFFS         0x3810
  86 #define OV5640_REG_TIMING_VOFFS         0x3812
  87 #define OV5640_REG_TIMING_TC_REG20      0x3820
  88 #define OV5640_REG_TIMING_TC_REG21      0x3821
  89 #define OV5640_REG_AEC_CTRL00           0x3a00
  90 #define OV5640_REG_AEC_B50_STEP         0x3a08
  91 #define OV5640_REG_AEC_B60_STEP         0x3a0a
  92 #define OV5640_REG_AEC_CTRL0D           0x3a0d
  93 #define OV5640_REG_AEC_CTRL0E           0x3a0e
  94 #define OV5640_REG_AEC_CTRL0F           0x3a0f
  95 #define OV5640_REG_AEC_CTRL10           0x3a10
  96 #define OV5640_REG_AEC_CTRL11           0x3a11
  97 #define OV5640_REG_AEC_CTRL1B           0x3a1b
  98 #define OV5640_REG_AEC_CTRL1E           0x3a1e
  99 #define OV5640_REG_AEC_CTRL1F           0x3a1f
 100 #define OV5640_REG_HZ5060_CTRL00        0x3c00
 101 #define OV5640_REG_HZ5060_CTRL01        0x3c01
 102 #define OV5640_REG_SIGMADELTA_CTRL0C    0x3c0c
 103 #define OV5640_REG_FRAME_CTRL01         0x4202
 104 #define OV5640_REG_FORMAT_CONTROL00     0x4300
 105 #define OV5640_REG_VFIFO_HSIZE          0x4602
 106 #define OV5640_REG_VFIFO_VSIZE          0x4604
 107 #define OV5640_REG_JPG_MODE_SELECT      0x4713
 108 #define OV5640_REG_CCIR656_CTRL00       0x4730
 109 #define OV5640_REG_POLARITY_CTRL00      0x4740
 110 #define OV5640_REG_MIPI_CTRL00          0x4800
 111 #define OV5640_REG_DEBUG_MODE           0x4814
 112 #define OV5640_REG_PCLK_PERIOD          0x4837
 113 #define OV5640_REG_ISP_FORMAT_MUX_CTRL  0x501f
 114 #define OV5640_REG_PRE_ISP_TEST_SET1    0x503d
 115 #define OV5640_REG_SDE_CTRL0            0x5580
 116 #define OV5640_REG_SDE_CTRL1            0x5581
 117 #define OV5640_REG_SDE_CTRL3            0x5583
 118 #define OV5640_REG_SDE_CTRL4            0x5584
 119 #define OV5640_REG_SDE_CTRL5            0x5585
 120 #define OV5640_REG_AVG_READOUT          0x56a1
 121
 122 enum ov5640_mode_id {
 123         OV5640_MODE_QQVGA_160_120 = 0,
 124         OV5640_MODE_QCIF_176_144,
 125         OV5640_MODE_QVGA_320_240,
 126         OV5640_MODE_VGA_640_480,
 127         OV5640_MODE_NTSC_720_480,
 128         OV5640_MODE_PAL_720_576,
 129         OV5640_MODE_XGA_1024_768,
 130         OV5640_MODE_720P_1280_720,
 131         OV5640_MODE_1080P_1920_1080,
 132         OV5640_MODE_QSXGA_2592_1944,
 133         OV5640_NUM_MODES,
 134 };
 135
 136 enum ov5640_frame_rate {
 137         OV5640_15_FPS = 0,
 138         OV5640_30_FPS,
 139         OV5640_60_FPS,
 140         OV5640_NUM_FRAMERATES,
 141 };
 142
 143 enum ov5640_pixel_rate_id {
 144         OV5640_PIXEL_RATE_168M,
 145         OV5640_PIXEL_RATE_148M,
 146         OV5640_PIXEL_RATE_124M,
 147         OV5640_PIXEL_RATE_96M,
 148         OV5640_PIXEL_RATE_48M,
 149         OV5640_NUM_PIXEL_RATES,
 150 };
 151
 152 /*
 153  * The chip manual suggests 24/48/96/192 MHz pixel clocks.
 154  *
 155  * 192MHz exceeds the sysclk limits; use 168MHz as maximum pixel rate for
 156  * full resolution mode @15 FPS.
 157  */
 158 static const u32 ov5640_pixel_rates[] = {
 159         [OV5640_PIXEL_RATE_168M] = 168000000,
 160         [OV5640_PIXEL_RATE_148M] = 148000000,
 161         [OV5640_PIXEL_RATE_124M] = 124000000,
 162         [OV5640_PIXEL_RATE_96M] = 96000000,
 163         [OV5640_PIXEL_RATE_48M] = 48000000,
 164 };
 165
 166 /*
 167  * MIPI CSI-2 link frequencies.
 168  *
 169  * Derived from the above defined pixel rate for bpp = (8, 16, 24) and
 170  * data_lanes = (1, 2)
 171  *
 172  * link_freq = (pixel_rate * bpp) / (2 * data_lanes)
 173  */
 174 static const s64 ov5640_csi2_link_freqs[] = {
 175         992000000, 888000000, 768000000, 744000000, 672000000, 672000000,
 176         592000000, 592000000, 576000000, 576000000, 496000000, 496000000,
 177         384000000, 384000000, 384000000, 336000000, 296000000, 288000000,
 178         248000000, 192000000, 192000000, 192000000, 96000000,
 179 };
 180
 181 /* Link freq for default mode: UYVY 16 bpp, 2 data lanes. */
 182 #define OV5640_DEFAULT_LINK_FREQ        13
 183
 184 enum ov5640_format_mux {
 185         OV5640_FMT_MUX_YUV422 = 0,
 186         OV5640_FMT_MUX_RGB,
 187         OV5640_FMT_MUX_DITHER,
 188         OV5640_FMT_MUX_RAW_DPC,
 189         OV5640_FMT_MUX_SNR_RAW,
 190         OV5640_FMT_MUX_RAW_CIP,
 191 };
 192
 193 struct ov5640_pixfmt {
 194         u32 code;
 195         u32 colorspace;
 196         u8 bpp;
 197         u8 ctrl00;
 198         enum ov5640_format_mux mux;
 199 };
 200
 201 static const struct ov5640_pixfmt ov5640_dvp_formats[] = {
 202         {
 203                 /* YUV422, YUYV */
 204                 .code           = MEDIA_BUS_FMT_JPEG_1X8,
 205                 .colorspace     = V4L2_COLORSPACE_JPEG,
 206                 .bpp            = 16,
 207                 .ctrl00         = 0x30,
 208                 .mux            = OV5640_FMT_MUX_YUV422,
 209         }, {
 210                 /* YUV422, UYVY */
 211                 .code           = MEDIA_BUS_FMT_UYVY8_2X8,
 212                 .colorspace     = V4L2_COLORSPACE_SRGB,
 213                 .bpp            = 16,
 214                 .ctrl00         = 0x3f,
 215                 .mux            = OV5640_FMT_MUX_YUV422,
 216         }, {
 217                 /* YUV422, YUYV */
 218                 .code           = MEDIA_BUS_FMT_YUYV8_2X8,
 219                 .colorspace     = V4L2_COLORSPACE_SRGB,
 220                 .bpp            = 16,
 221                 .ctrl00         = 0x30,
 222                 .mux            = OV5640_FMT_MUX_YUV422,
 223         }, {
 224                 /* RGB565 {g[2:0],b[4:0]},{r[4:0],g[5:3]} */
 225                 .code           = MEDIA_BUS_FMT_RGB565_2X8_LE,
 226                 .colorspace     = V4L2_COLORSPACE_SRGB,
 227                 .bpp            = 16,
 228                 .ctrl00         = 0x6f,
 229                 .mux            = OV5640_FMT_MUX_RGB,
 230         }, {
 231                 /* RGB565 {r[4:0],g[5:3]},{g[2:0],b[4:0]} */
 232                 .code           = MEDIA_BUS_FMT_RGB565_2X8_BE,
 233                 .colorspace     = V4L2_COLORSPACE_SRGB,
 234                 .bpp            = 16,
 235                 .ctrl00         = 0x61,
 236                 .mux            = OV5640_FMT_MUX_RGB,
 237         }, {
 238                 /* Raw, BGBG... / GRGR... */
 239                 .code           = MEDIA_BUS_FMT_SBGGR8_1X8,
 240                 .colorspace     = V4L2_COLORSPACE_SRGB,
 241                 .bpp            = 8,
 242                 .ctrl00         = 0x00,
 243                 .mux            = OV5640_FMT_MUX_RAW_DPC,
 244         }, {
 245                 /* Raw bayer, GBGB... / RGRG... */
 246                 .code           = MEDIA_BUS_FMT_SGBRG8_1X8,
 247                 .colorspace     = V4L2_COLORSPACE_SRGB,
 248                 .bpp            = 8,
 249                 .ctrl00         = 0x01,
 250                 .mux            = OV5640_FMT_MUX_RAW_DPC,
 251         }, {
 252                 /* Raw bayer, GRGR... / BGBG... */
 253                 .code           = MEDIA_BUS_FMT_SGRBG8_1X8,
 254                 .colorspace     = V4L2_COLORSPACE_SRGB,
 255                 .bpp            = 8,
 256                 .ctrl00         = 0x02,
 257                 .mux            = OV5640_FMT_MUX_RAW_DPC,
 258         }, {
 259                 /* Raw bayer, RGRG... / GBGB... */
 260                 .code           = MEDIA_BUS_FMT_SRGGB8_1X8,
 261                 .colorspace     = V4L2_COLORSPACE_SRGB,
 262                 .bpp            = 8,
 263                 .ctrl00         = 0x03,
 264                 .mux            = OV5640_FMT_MUX_RAW_DPC,
 265         },
 266         { /* sentinel */ }
 267 };
 268
 269 static const struct ov5640_pixfmt ov5640_csi2_formats[] = {
 270         {
 271                 /* YUV422, YUYV */
 272                 .code           = MEDIA_BUS_FMT_JPEG_1X8,
 273                 .colorspace     = V4L2_COLORSPACE_JPEG,
 274                 .bpp            = 16,
 275                 .ctrl00         = 0x30,
 276                 .mux            = OV5640_FMT_MUX_YUV422,
 277         }, {
 278                 /* YUV422, UYVY */
 279                 .code           = MEDIA_BUS_FMT_UYVY8_1X16,
 280                 .colorspace     = V4L2_COLORSPACE_SRGB,
 281                 .bpp            = 16,
 282                 .ctrl00         = 0x3f,
 283                 .mux            = OV5640_FMT_MUX_YUV422,
 284         }, {
 285                 /* YUV422, YUYV */
 286                 .code           = MEDIA_BUS_FMT_YUYV8_1X16,
 287                 .colorspace     = V4L2_COLORSPACE_SRGB,
 288                 .bpp            = 16,
 289                 .ctrl00         = 0x30,
 290                 .mux            = OV5640_FMT_MUX_YUV422,
 291         }, {
 292                 /* RGB565 {g[2:0],b[4:0]},{r[4:0],g[5:3]} */
 293                 .code           = MEDIA_BUS_FMT_RGB565_1X16,
 294                 .colorspace     = V4L2_COLORSPACE_SRGB,
 295                 .bpp            = 16,
 296                 .ctrl00         = 0x6f,
 297                 .mux            = OV5640_FMT_MUX_RGB,
 298         }, {
 299                 /* BGR888: RGB */
 300                 .code           = MEDIA_BUS_FMT_BGR888_1X24,
 301                 .colorspace     = V4L2_COLORSPACE_SRGB,
 302                 .bpp            = 24,
 303                 .ctrl00         = 0x23,
 304                 .mux            = OV5640_FMT_MUX_RGB,
 305         }, {
 306                 /* Raw, BGBG... / GRGR... */
 307                 .code           = MEDIA_BUS_FMT_SBGGR8_1X8,
 308                 .colorspace     = V4L2_COLORSPACE_SRGB,
 309                 .bpp            = 8,
 310                 .ctrl00         = 0x00,
 311                 .mux            = OV5640_FMT_MUX_RAW_DPC,
 312         }, {
 313                 /* Raw bayer, GBGB... / RGRG... */
 314                 .code           = MEDIA_BUS_FMT_SGBRG8_1X8,
 315                 .colorspace     = V4L2_COLORSPACE_SRGB,
 316                 .bpp            = 8,
 317                 .ctrl00         = 0x01,
 318                 .mux            = OV5640_FMT_MUX_RAW_DPC,
 319         }, {
 320                 /* Raw bayer, GRGR... / BGBG... */
 321                 .code           = MEDIA_BUS_FMT_SGRBG8_1X8,
 322                 .colorspace     = V4L2_COLORSPACE_SRGB,
 323                 .bpp            = 8,
 324                 .ctrl00         = 0x02,
 325                 .mux            = OV5640_FMT_MUX_RAW_DPC,
 326         }, {
 327                 /* Raw bayer, RGRG... / GBGB... */
 328                 .code           = MEDIA_BUS_FMT_SRGGB8_1X8,
 329                 .colorspace     = V4L2_COLORSPACE_SRGB,
 330                 .bpp            = 8,
 331                 .ctrl00         = 0x03,
 332                 .mux            = OV5640_FMT_MUX_RAW_DPC,
 333         },
 334         { /* sentinel */ }
 335 };
 336
 337 /*
 338  * FIXME: remove this when a subdev API becomes available
 339  * to set the MIPI CSI-2 virtual channel.
 340  */
 341 static unsigned int virtual_channel;
 342 module_param(virtual_channel, uint, 0444);
 343 MODULE_PARM_DESC(virtual_channel,
 344                  "MIPI CSI-2 virtual channel (0..3), default 0");
 345
 346 static const int ov5640_framerates[] = {
 347         [OV5640_15_FPS] = 15,
 348         [OV5640_30_FPS] = 30,
 349         [OV5640_60_FPS] = 60,
 350 };
 351
 352 /* regulator supplies */
 353 static const char * const ov5640_supply_name[] = {
 354         "DOVDD", /* Digital I/O (1.8V) supply */
 355         "AVDD",  /* Analog (2.8V) supply */
 356         "DVDD",  /* Digital Core (1.5V) supply */
 357 };
 358
 359 #define OV5640_NUM_SUPPLIES ARRAY_SIZE(ov5640_supply_name)
 360
 361 /*
 362  * Image size under 1280 * 960 are SUBSAMPLING
 363  * Image size upper 1280 * 960 are SCALING
 364  */
 365 enum ov5640_downsize_mode {
 366         SUBSAMPLING,
 367         SCALING,
 368 };
 369
 370 struct reg_value {
 371         u16 reg_addr;
 372         u8 val;
 373         u8 mask;
 374         u32 delay_ms;
 375 };
 376
 377 struct ov5640_timings {
 378         /* Analog crop rectangle. */
 379         struct v4l2_rect analog_crop;
 380         /* Visibile crop: from analog crop top-left corner. */
 381         struct v4l2_rect crop;
 382         /* Total pixels per line: width + fixed hblank. */
 383         u32 htot;
 384         /* Default vertical blanking: frame height = height + vblank. */
 385         u32 vblank_def;
 386 };
 387
 388 struct ov5640_mode_info {
 389         enum ov5640_mode_id id;
 390         enum ov5640_downsize_mode dn_mode;
 391         enum ov5640_pixel_rate_id pixel_rate;
 392
 393         unsigned int width;
 394         unsigned int height;
 395
 396         struct ov5640_timings dvp_timings;
 397         struct ov5640_timings csi2_timings;
 398
 399         const struct reg_value *reg_data;
 400         u32 reg_data_size;
 401
 402         /* Used by s_frame_interval only. */
 403         u32 max_fps;
 404         u32 def_fps;
 405 };
 406
 407 struct ov5640_ctrls {
 408         struct v4l2_ctrl_handler handler;
 409         struct v4l2_ctrl *pixel_rate;
 410         struct v4l2_ctrl *link_freq;
 411         struct v4l2_ctrl *hblank;
 412         struct v4l2_ctrl *vblank;
 413         struct {
 414                 struct v4l2_ctrl *auto_exp;
 415                 struct v4l2_ctrl *exposure;
 416         };
 417         struct {
 418                 struct v4l2_ctrl *auto_wb;
 419                 struct v4l2_ctrl *blue_balance;
 420                 struct v4l2_ctrl *red_balance;
 421         };
 422         struct {
 423                 struct v4l2_ctrl *auto_gain;
 424                 struct v4l2_ctrl *gain;
 425         };
 426         struct v4l2_ctrl *brightness;
 427         struct v4l2_ctrl *light_freq;
 428         struct v4l2_ctrl *saturation;
 429         struct v4l2_ctrl *contrast;
 430         struct v4l2_ctrl *hue;
 431         struct v4l2_ctrl *test_pattern;
 432         struct v4l2_ctrl *hflip;
 433         struct v4l2_ctrl *vflip;
 434 };
 435
 436 struct ov5640_dev {
 437         struct i2c_client *i2c_client;
 438         struct v4l2_subdev sd;
 439         struct media_pad pad;
 440         struct v4l2_fwnode_endpoint ep; /* the parsed DT endpoint info */
 441         struct clk *xclk; /* system clock to OV5640 */
 442         u32 xclk_freq;
 443
 444         struct regulator_bulk_data supplies[OV5640_NUM_SUPPLIES];
 445         struct gpio_desc *reset_gpio;
 446         struct gpio_desc *pwdn_gpio;
 447         bool   upside_down;
 448
 449         /* lock to protect all members below */
 450         struct mutex lock;
 451
 452         struct v4l2_mbus_framefmt fmt;
 453         bool pending_fmt_change;
 454
 455         const struct ov5640_mode_info *current_mode;
 456         const struct ov5640_mode_info *last_mode;
 457         enum ov5640_frame_rate current_fr;
 458         struct v4l2_fract frame_interval;
 459         s64 current_link_freq;
 460
 461         struct ov5640_ctrls ctrls;
 462
 463         u32 prev_sysclk, prev_hts;
 464         u32 ae_low, ae_high, ae_target;
 465
 466         bool pending_mode_change;
 467         bool streaming;
 468 };
 469
 470 static inline struct ov5640_dev *to_ov5640_dev(struct v4l2_subdev *sd)
 471 {
 472         return container_of(sd, struct ov5640_dev, sd);
 473 }
 474
 475 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
 476 {
 477         return &container_of(ctrl->handler, struct ov5640_dev,
 478                              ctrls.handler)->sd;
 479 }
 480
 481 static inline bool ov5640_is_csi2(const struct ov5640_dev *sensor)
 482 {
 483         return sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY;
 484 }
 485
 486 static inline const struct ov5640_pixfmt *
 487 ov5640_formats(struct ov5640_dev *sensor)
 488 {
 489         return ov5640_is_csi2(sensor) ? ov5640_csi2_formats
 490                                       : ov5640_dvp_formats;
 491 }
 492
 493 static const struct ov5640_pixfmt *
 494 ov5640_code_to_pixfmt(struct ov5640_dev *sensor, u32 code)
 495 {
 496         const struct ov5640_pixfmt *formats = ov5640_formats(sensor);
 497         unsigned int i;
 498
 499         for (i = 0; formats[i].code; ++i) {
 500                 if (formats[i].code == code)
 501                         return &formats[i];
 502         }
 503
 504         return &formats[0];
 505 }
 506
 507 static u32 ov5640_code_to_bpp(struct ov5640_dev *sensor, u32 code)
 508 {
 509         const struct ov5640_pixfmt *format = ov5640_code_to_pixfmt(sensor,
 510                                                                    code);
 511
 512         return format->bpp;
 513 }
 514
 515 /*
 516  * FIXME: all of these register tables are likely filled with
 517  * entries that set the register to their power-on default values,
 518  * and which are otherwise not touched by this driver. Those entries
 519  * should be identified and removed to speed register load time
 520  * over i2c.
 521  */
 522 /* YUV422 UYVY VGA@30fps */
 523
 524 static const struct v4l2_mbus_framefmt ov5640_csi2_default_fmt = {
 525         .code = MEDIA_BUS_FMT_UYVY8_1X16,
 526         .width = 640,
 527         .height = 480,
 528         .colorspace = V4L2_COLORSPACE_SRGB,
 529         .ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(V4L2_COLORSPACE_SRGB),
 530         .quantization = V4L2_QUANTIZATION_FULL_RANGE,
 531         .xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(V4L2_COLORSPACE_SRGB),
 532         .field = V4L2_FIELD_NONE,
 533 };
 534
 535 static const struct v4l2_mbus_framefmt ov5640_dvp_default_fmt = {
 536         .code = MEDIA_BUS_FMT_UYVY8_2X8,
 537         .width = 640,
 538         .height = 480,
 539         .colorspace = V4L2_COLORSPACE_SRGB,
 540         .ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(V4L2_COLORSPACE_SRGB),
 541         .quantization = V4L2_QUANTIZATION_FULL_RANGE,
 542         .xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(V4L2_COLORSPACE_SRGB),
 543         .field = V4L2_FIELD_NONE,
 544 };
 545
 546 static const struct reg_value ov5640_init_setting[] = {
 547         {0x3103, 0x11, 0, 0},
 548         {0x3103, 0x03, 0, 0}, {0x3630, 0x36, 0, 0},
 549         {0x3631, 0x0e, 0, 0}, {0x3632, 0xe2, 0, 0}, {0x3633, 0x12, 0, 0},
 550         {0x3621, 0xe0, 0, 0}, {0x3704, 0xa0, 0, 0}, {0x3703, 0x5a, 0, 0},
 551         {0x3715, 0x78, 0, 0}, {0x3717, 0x01, 0, 0}, {0x370b, 0x60, 0, 0},
 552         {0x3705, 0x1a, 0, 0}, {0x3905, 0x02, 0, 0}, {0x3906, 0x10, 0, 0},
 553         {0x3901, 0x0a, 0, 0}, {0x3731, 0x12, 0, 0}, {0x3600, 0x08, 0, 0},
 554         {0x3601, 0x33, 0, 0}, {0x302d, 0x60, 0, 0}, {0x3620, 0x52, 0, 0},
 555         {0x371b, 0x20, 0, 0}, {0x471c, 0x50, 0, 0}, {0x3a13, 0x43, 0, 0},
 556         {0x3a18, 0x00, 0, 0}, {0x3a19, 0xf8, 0, 0}, {0x3635, 0x13, 0, 0},
 557         {0x3636, 0x03, 0, 0}, {0x3634, 0x40, 0, 0}, {0x3622, 0x01, 0, 0},
 558         {0x3c01, 0xa4, 0, 0}, {0x3c04, 0x28, 0, 0}, {0x3c05, 0x98, 0, 0},
 559         {0x3c06, 0x00, 0, 0}, {0x3c07, 0x08, 0, 0}, {0x3c08, 0x00, 0, 0},
 560         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 561         {0x3820, 0x41, 0, 0}, {0x3821, 0x07, 0, 0}, {0x3814, 0x31, 0, 0},
 562         {0x3815, 0x31, 0, 0},
 563         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 564         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 565         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 566         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 567         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 568         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0}, {0x3000, 0x00, 0, 0},
 569         {0x3002, 0x1c, 0, 0}, {0x3004, 0xff, 0, 0}, {0x3006, 0xc3, 0, 0},
 570         {0x302e, 0x08, 0, 0}, {0x4300, 0x3f, 0, 0},
 571         {0x501f, 0x00, 0, 0}, {0x4407, 0x04, 0, 0},
 572         {0x440e, 0x00, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 573         {0x4837, 0x0a, 0, 0}, {0x3824, 0x02, 0, 0},
 574         {0x5000, 0xa7, 0, 0}, {0x5001, 0xa3, 0, 0}, {0x5180, 0xff, 0, 0},
 575         {0x5181, 0xf2, 0, 0}, {0x5182, 0x00, 0, 0}, {0x5183, 0x14, 0, 0},
 576         {0x5184, 0x25, 0, 0}, {0x5185, 0x24, 0, 0}, {0x5186, 0x09, 0, 0},
 577         {0x5187, 0x09, 0, 0}, {0x5188, 0x09, 0, 0}, {0x5189, 0x88, 0, 0},
 578         {0x518a, 0x54, 0, 0}, {0x518b, 0xee, 0, 0}, {0x518c, 0xb2, 0, 0},
 579         {0x518d, 0x50, 0, 0}, {0x518e, 0x34, 0, 0}, {0x518f, 0x6b, 0, 0},
 580         {0x5190, 0x46, 0, 0}, {0x5191, 0xf8, 0, 0}, {0x5192, 0x04, 0, 0},
 581         {0x5193, 0x70, 0, 0}, {0x5194, 0xf0, 0, 0}, {0x5195, 0xf0, 0, 0},
 582         {0x5196, 0x03, 0, 0}, {0x5197, 0x01, 0, 0}, {0x5198, 0x04, 0, 0},
 583         {0x5199, 0x6c, 0, 0}, {0x519a, 0x04, 0, 0}, {0x519b, 0x00, 0, 0},
 584         {0x519c, 0x09, 0, 0}, {0x519d, 0x2b, 0, 0}, {0x519e, 0x38, 0, 0},
 585         {0x5381, 0x1e, 0, 0}, {0x5382, 0x5b, 0, 0}, {0x5383, 0x08, 0, 0},
 586         {0x5384, 0x0a, 0, 0}, {0x5385, 0x7e, 0, 0}, {0x5386, 0x88, 0, 0},
 587         {0x5387, 0x7c, 0, 0}, {0x5388, 0x6c, 0, 0}, {0x5389, 0x10, 0, 0},
 588         {0x538a, 0x01, 0, 0}, {0x538b, 0x98, 0, 0}, {0x5300, 0x08, 0, 0},
 589         {0x5301, 0x30, 0, 0}, {0x5302, 0x10, 0, 0}, {0x5303, 0x00, 0, 0},
 590         {0x5304, 0x08, 0, 0}, {0x5305, 0x30, 0, 0}, {0x5306, 0x08, 0, 0},
 591         {0x5307, 0x16, 0, 0}, {0x5309, 0x08, 0, 0}, {0x530a, 0x30, 0, 0},
 592         {0x530b, 0x04, 0, 0}, {0x530c, 0x06, 0, 0}, {0x5480, 0x01, 0, 0},
 593         {0x5481, 0x08, 0, 0}, {0x5482, 0x14, 0, 0}, {0x5483, 0x28, 0, 0},
 594         {0x5484, 0x51, 0, 0}, {0x5485, 0x65, 0, 0}, {0x5486, 0x71, 0, 0},
 595         {0x5487, 0x7d, 0, 0}, {0x5488, 0x87, 0, 0}, {0x5489, 0x91, 0, 0},
 596         {0x548a, 0x9a, 0, 0}, {0x548b, 0xaa, 0, 0}, {0x548c, 0xb8, 0, 0},
 597         {0x548d, 0xcd, 0, 0}, {0x548e, 0xdd, 0, 0}, {0x548f, 0xea, 0, 0},
 598         {0x5490, 0x1d, 0, 0}, {0x5580, 0x02, 0, 0}, {0x5583, 0x40, 0, 0},
 599         {0x5584, 0x10, 0, 0}, {0x5589, 0x10, 0, 0}, {0x558a, 0x00, 0, 0},
 600         {0x558b, 0xf8, 0, 0}, {0x5800, 0x23, 0, 0}, {0x5801, 0x14, 0, 0},
 601         {0x5802, 0x0f, 0, 0}, {0x5803, 0x0f, 0, 0}, {0x5804, 0x12, 0, 0},
 602         {0x5805, 0x26, 0, 0}, {0x5806, 0x0c, 0, 0}, {0x5807, 0x08, 0, 0},
 603         {0x5808, 0x05, 0, 0}, {0x5809, 0x05, 0, 0}, {0x580a, 0x08, 0, 0},
 604         {0x580b, 0x0d, 0, 0}, {0x580c, 0x08, 0, 0}, {0x580d, 0x03, 0, 0},
 605         {0x580e, 0x00, 0, 0}, {0x580f, 0x00, 0, 0}, {0x5810, 0x03, 0, 0},
 606         {0x5811, 0x09, 0, 0}, {0x5812, 0x07, 0, 0}, {0x5813, 0x03, 0, 0},
 607         {0x5814, 0x00, 0, 0}, {0x5815, 0x01, 0, 0}, {0x5816, 0x03, 0, 0},
 608         {0x5817, 0x08, 0, 0}, {0x5818, 0x0d, 0, 0}, {0x5819, 0x08, 0, 0},
 609         {0x581a, 0x05, 0, 0}, {0x581b, 0x06, 0, 0}, {0x581c, 0x08, 0, 0},
 610         {0x581d, 0x0e, 0, 0}, {0x581e, 0x29, 0, 0}, {0x581f, 0x17, 0, 0},
 611         {0x5820, 0x11, 0, 0}, {0x5821, 0x11, 0, 0}, {0x5822, 0x15, 0, 0},
 612         {0x5823, 0x28, 0, 0}, {0x5824, 0x46, 0, 0}, {0x5825, 0x26, 0, 0},
 613         {0x5826, 0x08, 0, 0}, {0x5827, 0x26, 0, 0}, {0x5828, 0x64, 0, 0},
 614         {0x5829, 0x26, 0, 0}, {0x582a, 0x24, 0, 0}, {0x582b, 0x22, 0, 0},
 615         {0x582c, 0x24, 0, 0}, {0x582d, 0x24, 0, 0}, {0x582e, 0x06, 0, 0},
 616         {0x582f, 0x22, 0, 0}, {0x5830, 0x40, 0, 0}, {0x5831, 0x42, 0, 0},
 617         {0x5832, 0x24, 0, 0}, {0x5833, 0x26, 0, 0}, {0x5834, 0x24, 0, 0},
 618         {0x5835, 0x22, 0, 0}, {0x5836, 0x22, 0, 0}, {0x5837, 0x26, 0, 0},
 619         {0x5838, 0x44, 0, 0}, {0x5839, 0x24, 0, 0}, {0x583a, 0x26, 0, 0},
 620         {0x583b, 0x28, 0, 0}, {0x583c, 0x42, 0, 0}, {0x583d, 0xce, 0, 0},
 621         {0x5025, 0x00, 0, 0}, {0x3a0f, 0x30, 0, 0}, {0x3a10, 0x28, 0, 0},
 622         {0x3a1b, 0x30, 0, 0}, {0x3a1e, 0x26, 0, 0}, {0x3a11, 0x60, 0, 0},
 623         {0x3a1f, 0x14, 0, 0}, {0x3008, 0x02, 0, 0}, {0x3c00, 0x04, 0, 300},
 624 };
 625
 626 static const struct reg_value ov5640_setting_low_res[] = {
 627         {0x3c07, 0x08, 0, 0},
 628         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 629         {0x3814, 0x31, 0, 0},
 630         {0x3815, 0x31, 0, 0},
 631         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 632         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 633         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 634         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 635         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 636         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 637         {0x4407, 0x04, 0, 0}, {0x5001, 0xa3, 0, 0},
 638 };
 639
 640 static const struct reg_value ov5640_setting_720P_1280_720[] = {
 641         {0x3c07, 0x07, 0, 0},
 642         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 643         {0x3814, 0x31, 0, 0},
 644         {0x3815, 0x31, 0, 0},
 645         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 646         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x02, 0, 0},
 647         {0x3a03, 0xe4, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0xbc, 0, 0},
 648         {0x3a0a, 0x01, 0, 0}, {0x3a0b, 0x72, 0, 0}, {0x3a0e, 0x01, 0, 0},
 649         {0x3a0d, 0x02, 0, 0}, {0x3a14, 0x02, 0, 0}, {0x3a15, 0xe4, 0, 0},
 650         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 651         {0x4407, 0x04, 0, 0}, {0x460b, 0x37, 0, 0}, {0x460c, 0x20, 0, 0},
 652         {0x3824, 0x04, 0, 0}, {0x5001, 0x83, 0, 0},
 653 };
 654
 655 static const struct reg_value ov5640_setting_1080P_1920_1080[] = {
 656         {0x3c07, 0x08, 0, 0},
 657         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 658         {0x3814, 0x11, 0, 0},
 659         {0x3815, 0x11, 0, 0},
 660         {0x3618, 0x04, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x21, 0, 0},
 661         {0x3709, 0x12, 0, 0}, {0x370c, 0x00, 0, 0}, {0x3a02, 0x03, 0, 0},
 662         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 663         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 664         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 665         {0x4001, 0x02, 0, 0}, {0x4004, 0x06, 0, 0},
 666         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 667         {0x3824, 0x02, 0, 0}, {0x5001, 0x83, 0, 0},
 668         {0x3c07, 0x07, 0, 0}, {0x3c08, 0x00, 0, 0},
 669         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 670         {0x3612, 0x2b, 0, 0}, {0x3708, 0x64, 0, 0},
 671         {0x3a02, 0x04, 0, 0}, {0x3a03, 0x60, 0, 0}, {0x3a08, 0x01, 0, 0},
 672         {0x3a09, 0x50, 0, 0}, {0x3a0a, 0x01, 0, 0}, {0x3a0b, 0x18, 0, 0},
 673         {0x3a0e, 0x03, 0, 0}, {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x04, 0, 0},
 674         {0x3a15, 0x60, 0, 0}, {0x4407, 0x04, 0, 0},
 675         {0x460b, 0x37, 0, 0}, {0x460c, 0x20, 0, 0}, {0x3824, 0x04, 0, 0},
 676         {0x4005, 0x1a, 0, 0},
 677 };
 678
 679 static const struct reg_value ov5640_setting_QSXGA_2592_1944[] = {
 680         {0x3c07, 0x08, 0, 0},
 681         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 682         {0x3814, 0x11, 0, 0},
 683         {0x3815, 0x11, 0, 0},
 684         {0x3618, 0x04, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x21, 0, 0},
 685         {0x3709, 0x12, 0, 0}, {0x370c, 0x00, 0, 0}, {0x3a02, 0x03, 0, 0},
 686         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 687         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 688         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 689         {0x4001, 0x02, 0, 0}, {0x4004, 0x06, 0, 0},
 690         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 691         {0x3824, 0x02, 0, 0}, {0x5001, 0x83, 0, 70},
 692 };
 693
 694 static const struct ov5640_mode_info ov5640_mode_data[OV5640_NUM_MODES] = {
 695         {
 696                 /* 160x120 */
 697                 .id             = OV5640_MODE_QQVGA_160_120,
 698                 .dn_mode        = SUBSAMPLING,
 699                 .pixel_rate     = OV5640_PIXEL_RATE_48M,
 700                 .width          = 160,
 701                 .height         = 120,
 702                 .dvp_timings = {
 703                         .analog_crop = {
 704                                 .left   = 0,
 705                                 .top    = 4,
 706                                 .width  = 2624,
 707                                 .height = 1944,
 708                         },
 709                         .crop = {
 710                                 .left   = 16,
 711                                 .top    = 6,
 712                                 .width  = 160,
 713                                 .height = 120,
 714                         },
 715                         .htot           = 1896,
 716                         .vblank_def     = 864,
 717                 },
 718                 .csi2_timings = {
 719                         /* Feed the full valid pixel array to the ISP. */
 720                         .analog_crop = {
 721                                 .left   = OV5640_PIXEL_ARRAY_LEFT,
 722                                 .top    = OV5640_PIXEL_ARRAY_TOP,
 723                                 .width  = OV5640_PIXEL_ARRAY_WIDTH,
 724                                 .height = OV5640_PIXEL_ARRAY_HEIGHT,
 725                         },
 726                         /* Maintain a minimum processing margin. */
 727                         .crop = {
 728                                 .left   = 2,
 729                                 .top    = 4,
 730                                 .width  = 160,
 731                                 .height = 120,
 732                         },
 733                         .htot           = 1600,
 734                         .vblank_def     = 878,
 735                 },
 736                 .reg_data       = ov5640_setting_low_res,
 737                 .reg_data_size  = ARRAY_SIZE(ov5640_setting_low_res),
 738                 .max_fps        = OV5640_30_FPS,
 739                 .def_fps        = OV5640_30_FPS
 740         }, {
 741                 /* 176x144 */
 742                 .id             = OV5640_MODE_QCIF_176_144,
 743                 .dn_mode        = SUBSAMPLING,
 744                 .pixel_rate     = OV5640_PIXEL_RATE_48M,
 745                 .width          = 176,
 746                 .height         = 144,
 747                 .dvp_timings = {
 748                         .analog_crop = {
 749                                 .left   = 0,
 750                                 .top    = 4,
 751                                 .width  = 2624,
 752                                 .height = 1944,
 753                         },
 754                         .crop = {
 755                                 .left   = 16,
 756                                 .top    = 6,
 757                                 .width  = 176,
 758                                 .height = 144,
 759                         },
 760                         .htot           = 1896,
 761                         .vblank_def     = 840,
 762                 },
 763                 .csi2_timings = {
 764                         /* Feed the full valid pixel array to the ISP. */
 765                         .analog_crop = {
 766                                 .left   = OV5640_PIXEL_ARRAY_LEFT,
 767                                 .top    = OV5640_PIXEL_ARRAY_TOP,
 768                                 .width  = OV5640_PIXEL_ARRAY_WIDTH,
 769                                 .height = OV5640_PIXEL_ARRAY_HEIGHT,
 770                         },
 771                         /* Maintain a minimum processing margin. */
 772                         .crop = {
 773                                 .left   = 2,
 774                                 .top    = 4,
 775                                 .width  = 176,
 776                                 .height = 144,
 777                         },
 778                         .htot           = 1600,
 779                         .vblank_def     = 854,
 780                 },
 781                 .reg_data       = ov5640_setting_low_res,
 782                 .reg_data_size  = ARRAY_SIZE(ov5640_setting_low_res),
 783                 .max_fps        = OV5640_30_FPS,
 784                 .def_fps        = OV5640_30_FPS
 785         }, {
 786                 /* 320x240 */
 787                 .id             = OV5640_MODE_QVGA_320_240,
 788                 .dn_mode        = SUBSAMPLING,
 789                 .width          = 320,
 790                 .height         = 240,
 791                 .pixel_rate     = OV5640_PIXEL_RATE_48M,
 792                 .dvp_timings = {
 793                         .analog_crop = {
 794                                 .left   = 0,
 795                                 .top    = 4,
 796                                 .width  = 2624,
 797                                 .height = 1944,
 798                         },
 799                         .crop = {
 800                                 .left   = 16,
 801                                 .top    = 6,
 802                                 .width  = 320,
 803                                 .height = 240,
 804                         },
 805                         .htot           = 1896,
 806                         .vblank_def     = 744,
 807                 },
 808                 .csi2_timings = {
 809                         /* Feed the full valid pixel array to the ISP. */
 810                         .analog_crop = {
 811                                 .left   = OV5640_PIXEL_ARRAY_LEFT,
 812                                 .top    = OV5640_PIXEL_ARRAY_TOP,
 813                                 .width  = OV5640_PIXEL_ARRAY_WIDTH,
 814                                 .height = OV5640_PIXEL_ARRAY_HEIGHT,
 815                         },
 816                         /* Maintain a minimum processing margin. */
 817                         .crop = {
 818                                 .left   = 2,
 819                                 .top    = 4,
 820                                 .width  = 320,
 821                                 .height = 240,
 822                         },
 823                         .htot           = 1600,
 824                         .vblank_def     = 760,
 825                 },
 826                 .reg_data       = ov5640_setting_low_res,
 827                 .reg_data_size  = ARRAY_SIZE(ov5640_setting_low_res),
 828                 .max_fps        = OV5640_30_FPS,
 829                 .def_fps        = OV5640_30_FPS
 830         }, {
 831                 /* 640x480 */
 832                 .id             = OV5640_MODE_VGA_640_480,
 833                 .dn_mode        = SUBSAMPLING,
 834                 .pixel_rate     = OV5640_PIXEL_RATE_48M,
 835                 .width          = 640,
 836                 .height         = 480,
 837                 .dvp_timings = {
 838                         .analog_crop = {
 839                                 .left   = 0,
 840                                 .top    = 4,
 841                                 .width  = 2624,
 842                                 .height = 1944,
 843                         },
 844                         .crop = {
 845                                 .left   = 16,
 846                                 .top    = 6,
 847                                 .width  = 640,
 848                                 .height = 480,
 849                         },
 850                         .htot           = 1896,
 851                         .vblank_def     = 600,
 852                 },
 853                 .csi2_timings = {
 854                         /* Feed the full valid pixel array to the ISP. */
 855                         .analog_crop = {
 856                                 .left   = OV5640_PIXEL_ARRAY_LEFT,
 857                                 .top    = OV5640_PIXEL_ARRAY_TOP,
 858                                 .width  = OV5640_PIXEL_ARRAY_WIDTH,
 859                                 .height = OV5640_PIXEL_ARRAY_HEIGHT,
 860                         },
 861                         /* Maintain a minimum processing margin. */
 862                         .crop = {
 863                                 .left   = 2,
 864                                 .top    = 4,
 865                                 .width  = 640,
 866                                 .height = 480,
 867                         },
 868                         .htot           = 1600,
 869                         .vblank_def     = 520,
 870                 },
 871                 .reg_data       = ov5640_setting_low_res,
 872                 .reg_data_size  = ARRAY_SIZE(ov5640_setting_low_res),
 873                 .max_fps        = OV5640_60_FPS,
 874                 .def_fps        = OV5640_30_FPS
 875         }, {
 876                 /* 720x480 */
 877                 .id             = OV5640_MODE_NTSC_720_480,
 878                 .dn_mode        = SUBSAMPLING,
 879                 .width          = 720,
 880                 .height         = 480,
 881                 .pixel_rate     = OV5640_PIXEL_RATE_96M,
 882                 .dvp_timings = {
 883                         .analog_crop = {
 884                                 .left   = 0,
 885                                 .top    = 4,
 886                                 .width  = 2624,
 887                                 .height = 1944,
 888                         },
 889                         .crop = {
 890                                 .left   = 56,
 891                                 .top    = 60,
 892                                 .width  = 720,
 893                                 .height = 480,
 894                         },
 895                         .htot           = 1896,
 896                         .vblank_def     = 504,
 897                 },
 898                 .csi2_timings = {
 899                         /* Feed the full valid pixel array to the ISP. */
 900                         .analog_crop = {
 901                                 .left   = OV5640_PIXEL_ARRAY_LEFT,
 902                                 .top    = OV5640_PIXEL_ARRAY_TOP,
 903                                 .width  = OV5640_PIXEL_ARRAY_WIDTH,
 904                                 .height = OV5640_PIXEL_ARRAY_HEIGHT,
 905                         },
 906                         .crop = {
 907                                 .left   = 56,
 908                                 .top    = 60,
 909                                 .width  = 720,
 910                                 .height = 480,
 911                         },
 912                         .htot           = 1896,
 913                         .vblank_def     = 1206,
 914                 },
 915                 .reg_data       = ov5640_setting_low_res,
 916                 .reg_data_size  = ARRAY_SIZE(ov5640_setting_low_res),
 917                 .max_fps        = OV5640_30_FPS,
 918                 .def_fps        = OV5640_30_FPS
 919         }, {
 920                 /* 720x576 */
 921                 .id             = OV5640_MODE_PAL_720_576,
 922                 .dn_mode        = SUBSAMPLING,
 923                 .width          = 720,
 924                 .height         = 576,
 925                 .pixel_rate     = OV5640_PIXEL_RATE_96M,
 926                 .dvp_timings = {
 927                         .analog_crop = {
 928                                 .left   = 0,
 929                                 .top    = 4,
 930                                 .width  = 2624,
 931                                 .height = 1944,
 932                         },
 933                         .crop = {
 934                                 .left   = 56,
 935                                 .top    = 6,
 936                                 .width  = 720,
 937                                 .height = 576,
 938                         },
 939                         .htot           = 1896,
 940                         .vblank_def     = 408,
 941                 },
 942                 .csi2_timings = {
 943                         /* Feed the full valid pixel array to the ISP. */
 944                         .analog_crop = {
 945                                 .left   = OV5640_PIXEL_ARRAY_LEFT,
 946                                 .top    = OV5640_PIXEL_ARRAY_TOP,
 947                                 .width  = OV5640_PIXEL_ARRAY_WIDTH,
 948                                 .height = OV5640_PIXEL_ARRAY_HEIGHT,
 949                         },
 950                         .crop = {
 951                                 .left   = 56,
 952                                 .top    = 6,
 953                                 .width  = 720,
 954                                 .height = 576,
 955                         },
 956                         .htot           = 1896,
 957                         .vblank_def     = 1110,
 958                 },
 959                 .reg_data       = ov5640_setting_low_res,
 960                 .reg_data_size  = ARRAY_SIZE(ov5640_setting_low_res),
 961                 .max_fps        = OV5640_30_FPS,
 962                 .def_fps        = OV5640_30_FPS
 963         }, {
 964                 /* 1024x768 */
 965                 .id             = OV5640_MODE_XGA_1024_768,
 966                 .dn_mode        = SUBSAMPLING,
 967                 .pixel_rate     = OV5640_PIXEL_RATE_96M,
 968                 .width          = 1024,
 969                 .height         = 768,
 970                 .dvp_timings = {
 971                         .analog_crop = {
 972                                 .left   = 0,
 973                                 .top    = 4,
 974                                 .width  = 2624,
 975                                 .height = 1944,
 976                         },
 977                         .crop = {
 978                                 .left   = 16,
 979                                 .top    = 6,
 980                                 .width  = 1024,
 981                                 .height = 768,
 982                         },
 983                         .htot           = 1896,
 984                         .vblank_def     = 312,
 985                 },
 986                 .csi2_timings = {
 987                         .analog_crop = {
 988                                 .left   = 0,
 989                                 .top    = 4,
 990                                 .width  = OV5640_NATIVE_WIDTH,
 991                                 .height = OV5640_PIXEL_ARRAY_HEIGHT,
 992                         },
 993                         .crop = {
 994                                 .left   = 16,
 995                                 .top    = 6,
 996                                 .width  = 1024,
 997                                 .height = 768,
 998                         },
 999                         .htot           = 1896,
1000                         .vblank_def     = 918,
1001                 },
1002                 .reg_data       = ov5640_setting_low_res,
1003                 .reg_data_size  = ARRAY_SIZE(ov5640_setting_low_res),
1004                 .max_fps        = OV5640_30_FPS,
1005                 .def_fps        = OV5640_30_FPS
1006         }, {
1007                 /* 1280x720 */
1008                 .id             = OV5640_MODE_720P_1280_720,
1009                 .dn_mode        = SUBSAMPLING,
1010                 .pixel_rate     = OV5640_PIXEL_RATE_124M,
1011                 .width          = 1280,
1012                 .height         = 720,
1013                 .dvp_timings = {
1014                         .analog_crop = {
1015                                 .left   = 0,
1016                                 .top    = 250,
1017                                 .width  = 2624,
1018                                 .height = 1456,
1019                         },
1020                         .crop = {
1021                                 .left   = 16,
1022                                 .top    = 4,
1023                                 .width  = 1280,
1024                                 .height = 720,
1025                         },
1026                         .htot           = 1892,
1027                         .vblank_def     = 20,
1028                 },
1029                 .csi2_timings = {
1030                         .analog_crop = {
1031                                 .left   = 0,
1032                                 .top    = 250,
1033                                 .width  = 2624,
1034                                 .height = 1456,
1035                         },
1036                         .crop = {
1037                                 .left   = 16,
1038                                 .top    = 4,
1039                                 .width  = 1280,
1040                                 .height = 720,
1041                         },
1042                         .htot           = 1600,
1043                         .vblank_def     = 560,
1044                 },
1045                 .reg_data       = ov5640_setting_720P_1280_720,
1046                 .reg_data_size  = ARRAY_SIZE(ov5640_setting_720P_1280_720),
1047                 .max_fps        = OV5640_30_FPS,
1048                 .def_fps        = OV5640_30_FPS
1049         }, {
1050                 /* 1920x1080 */
1051                 .id             = OV5640_MODE_1080P_1920_1080,
1052                 .dn_mode        = SCALING,
1053                 .pixel_rate     = OV5640_PIXEL_RATE_148M,
1054                 .width          = 1920,
1055                 .height         = 1080,
1056                 .dvp_timings = {
1057                         .analog_crop = {
1058                                 .left   = 336,
1059                                 .top    = 434,
1060                                 .width  = 1952,
1061                                 .height = 1088,
1062                         },
1063                         .crop = {
1064                                 .left   = 16,
1065                                 .top    = 4,
1066                                 .width  = 1920,
1067                                 .height = 1080,
1068                         },
1069                         .htot           = 2500,
1070                         .vblank_def     = 40,
1071                 },
1072                 .csi2_timings = {
1073                         /* Crop the full valid pixel array in the center. */
1074                         .analog_crop = {
1075                                 .left   = 336,
1076                                 .top    = 434,
1077                                 .width  = 1952,
1078                                 .height = 1088,
1079                         },
1080                         /* Maintain a larger processing margins. */
1081                         .crop = {
1082                                 .left   = 16,
1083                                 .top    = 4,
1084                                 .width  = 1920,
1085                                 .height = 1080,
1086                         },
1087                         .htot           = 2234,
1088                         .vblank_def     = 24,
1089                 },
1090                 .reg_data       = ov5640_setting_1080P_1920_1080,
1091                 .reg_data_size  = ARRAY_SIZE(ov5640_setting_1080P_1920_1080),
1092                 .max_fps        = OV5640_30_FPS,
1093                 .def_fps        = OV5640_30_FPS
1094         }, {
1095                 /* 2592x1944 */
1096                 .id             = OV5640_MODE_QSXGA_2592_1944,
1097                 .dn_mode        = SCALING,
1098                 .pixel_rate     = OV5640_PIXEL_RATE_168M,
1099                 .width          = OV5640_PIXEL_ARRAY_WIDTH,
1100                 .height         = OV5640_PIXEL_ARRAY_HEIGHT,
1101                 .dvp_timings = {
1102                         .analog_crop = {
1103                                 .left   = 0,
1104                                 .top    = 0,
1105                                 .width  = 2624,
1106                                 .height = 1952,
1107                         },
1108                         .crop = {
1109                                 .left   = 16,
1110                                 .top    = 4,
1111                                 .width  = 2592,
1112                                 .height = 1944,
1113                         },
1114                         .htot           = 2844,
1115                         .vblank_def     = 24,
1116                 },
1117                 .csi2_timings = {
1118                         /* Give more processing margin to full resolution. */
1119                         .analog_crop = {
1120                                 .left   = 0,
1121                                 .top    = 0,
1122                                 .width  = OV5640_NATIVE_WIDTH,
1123                                 .height = 1952,
1124                         },
1125                         .crop = {
1126                                 .left   = 16,
1127                                 .top    = 4,
1128                                 .width  = 2592,
1129                                 .height = 1944,
1130                         },
1131                         .htot           = 2844,
1132                         .vblank_def     = 24,
1133                 },
1134                 .reg_data       = ov5640_setting_QSXGA_2592_1944,
1135                 .reg_data_size  = ARRAY_SIZE(ov5640_setting_QSXGA_2592_1944),
1136                 .max_fps        = OV5640_15_FPS,
1137                 .def_fps        = OV5640_15_FPS
1138         },
1139 };
1140
1141 static const struct ov5640_timings *
1142 ov5640_timings(const struct ov5640_dev *sensor,
1143                const struct ov5640_mode_info *mode)
1144 {
1145         if (ov5640_is_csi2(sensor))
1146                 return &mode->csi2_timings;
1147
1148         return &mode->dvp_timings;
1149 }
1150
1151 static int ov5640_init_slave_id(struct ov5640_dev *sensor)
1152 {
1153         struct i2c_client *client = sensor->i2c_client;
1154         struct i2c_msg msg;
1155         u8 buf[3];
1156         int ret;
1157
1158         if (client->addr == OV5640_DEFAULT_SLAVE_ID)
1159                 return 0;
1160
1161         buf[0] = OV5640_REG_SLAVE_ID >> 8;
1162         buf[1] = OV5640_REG_SLAVE_ID & 0xff;
1163         buf[2] = client->addr << 1;
1164
1165         msg.addr = OV5640_DEFAULT_SLAVE_ID;
1166         msg.flags = 0;
1167         msg.buf = buf;
1168         msg.len = sizeof(buf);
1169
1170         ret = i2c_transfer(client->adapter, &msg, 1);
1171         if (ret < 0) {
1172                 dev_err(&client->dev, "%s: failed with %d\n", __func__, ret);
1173                 return ret;
1174         }
1175
1176         return 0;
1177 }
1178
1179 static int ov5640_write_reg(struct ov5640_dev *sensor, u16 reg, u8 val)
1180 {
1181         struct i2c_client *client = sensor->i2c_client;
1182         struct i2c_msg msg;
1183         u8 buf[3];
1184         int ret;
1185
1186         buf[0] = reg >> 8;
1187         buf[1] = reg & 0xff;
1188         buf[2] = val;
1189
1190         msg.addr = client->addr;
1191         msg.flags = client->flags;
1192         msg.buf = buf;
1193         msg.len = sizeof(buf);
1194
1195         ret = i2c_transfer(client->adapter, &msg, 1);
1196         if (ret < 0) {
1197                 dev_err(&client->dev, "%s: error: reg=%x, val=%x\n",
1198                         __func__, reg, val);
1199                 return ret;
1200         }
1201
1202         return 0;
1203 }
1204
1205 static int ov5640_read_reg(struct ov5640_dev *sensor, u16 reg, u8 *val)
1206 {
1207         struct i2c_client *client = sensor->i2c_client;
1208         struct i2c_msg msg[2];
1209         u8 buf[2];
1210         int ret;
1211
1212         buf[0] = reg >> 8;
1213         buf[1] = reg & 0xff;
1214
1215         msg[0].addr = client->addr;
1216         msg[0].flags = client->flags;
1217         msg[0].buf = buf;
1218         msg[0].len = sizeof(buf);
1219
1220         msg[1].addr = client->addr;
1221         msg[1].flags = client->flags | I2C_M_RD;
1222         msg[1].buf = buf;
1223         msg[1].len = 1;
1224
1225         ret = i2c_transfer(client->adapter, msg, 2);
1226         if (ret < 0) {
1227                 dev_err(&client->dev, "%s: error: reg=%x\n",
1228                         __func__, reg);
1229                 return ret;
1230         }
1231
1232         *val = buf[0];
1233         return 0;
1234 }
1235
1236 static int ov5640_read_reg16(struct ov5640_dev *sensor, u16 reg, u16 *val)
1237 {
1238         u8 hi, lo;
1239         int ret;
1240
1241         ret = ov5640_read_reg(sensor, reg, &hi);
1242         if (ret)
1243                 return ret;
1244         ret = ov5640_read_reg(sensor, reg + 1, &lo);
1245         if (ret)
1246                 return ret;
1247
1248         *val = ((u16)hi << 8) | (u16)lo;
1249         return 0;
1250 }
1251
1252 static int ov5640_write_reg16(struct ov5640_dev *sensor, u16 reg, u16 val)
1253 {
1254         int ret;
1255
1256         ret = ov5640_write_reg(sensor, reg, val >> 8);
1257         if (ret)
1258                 return ret;
1259
1260         return ov5640_write_reg(sensor, reg + 1, val & 0xff);
1261 }
1262
1263 static int ov5640_mod_reg(struct ov5640_dev *sensor, u16 reg,
1264                           u8 mask, u8 val)
1265 {
1266         u8 readval;
1267         int ret;
1268
1269         ret = ov5640_read_reg(sensor, reg, &readval);
1270         if (ret)
1271                 return ret;
1272
1273         readval &= ~mask;
1274         val &= mask;
1275         val |= readval;
1276
1277         return ov5640_write_reg(sensor, reg, val);
1278 }
1279
1280 /*
1281  * After trying the various combinations, reading various
1282  * documentations spread around the net, and from the various
1283  * feedback, the clock tree is probably as follows:
1284  *
1285  *   +--------------+
1286  *   |  Ext. Clock  |
1287  *   +-+------------+
1288  *     |  +----------+
1289  *     +->|   PLL1   | - reg 0x3036, for the multiplier
1290  *        +-+--------+ - reg 0x3037, bits 0-3 for the pre-divider
1291  *          |  +--------------+
1292  *          +->| System Clock |  - reg 0x3035, bits 4-7
1293  *             +-+------------+
1294  *               |  +--------------+
1295  *               +->| MIPI Divider | - reg 0x3035, bits 0-3
1296  *               |  +-+------------+
1297  *               |    +----------------> MIPI SCLK
1298  *               |    +  +-----+
1299  *               |    +->| / 2 |-------> MIPI BIT CLK
1300  *               |       +-----+
1301  *               |  +--------------+
1302  *               +->| PLL Root Div | - reg 0x3037, bit 4
1303  *                  +-+------------+
1304  *                    |  +---------+
1305  *                    +->| Bit Div | - reg 0x3034, bits 0-3
1306  *                       +-+-------+
1307  *                         |  +-------------+
1308  *                         +->| SCLK Div    | - reg 0x3108, bits 0-1
1309  *                         |  +-+-----------+
1310  *                         |    +---------------> SCLK
1311  *                         |  +-------------+
1312  *                         +->| SCLK 2X Div | - reg 0x3108, bits 2-3
1313  *                         |  +-+-----------+
1314  *                         |    +---------------> SCLK 2X
1315  *                         |  +-------------+
1316  *                         +->| PCLK Div    | - reg 0x3108, bits 4-5
1317  *                            ++------------+
1318  *                             +  +-----------+
1319  *                             +->|   P_DIV   | - reg 0x3035, bits 0-3
1320  *                                +-----+-----+
1321  *                                       +------------> PCLK
1322  *
1323  * There seems to be also constraints:
1324  *  - the PLL pre-divider output rate should be in the 4-27MHz range
1325  *  - the PLL multiplier output rate should be in the 500-1000MHz range
1326  *  - PCLK >= SCLK * 2 in YUV, >= SCLK in Raw or JPEG
1327  */
1328
1329 /*
1330  * This is supposed to be ranging from 1 to 8, but the value is always
1331  * set to 3 in the vendor kernels.
1332  */
1333 #define OV5640_PLL_PREDIV       3
1334
1335 #define OV5640_PLL_MULT_MIN     4
1336 #define OV5640_PLL_MULT_MAX     252
1337
1338 /*
1339  * This is supposed to be ranging from 1 to 16, but the value is
1340  * always set to either 1 or 2 in the vendor kernels.
1341  */
1342 #define OV5640_SYSDIV_MIN       1
1343 #define OV5640_SYSDIV_MAX       16
1344
1345 /*
1346  * This is supposed to be ranging from 1 to 2, but the value is always
1347  * set to 2 in the vendor kernels.
1348  */
1349 #define OV5640_PLL_ROOT_DIV                     2
1350 #define OV5640_PLL_CTRL3_PLL_ROOT_DIV_2         BIT(4)
1351
1352 /*
1353  * We only supports 8-bit formats at the moment
1354  */
1355 #define OV5640_BIT_DIV                          2
1356 #define OV5640_PLL_CTRL0_MIPI_MODE_8BIT         0x08
1357
1358 /*
1359  * This is supposed to be ranging from 1 to 8, but the value is always
1360  * set to 2 in the vendor kernels.
1361  */
1362 #define OV5640_SCLK_ROOT_DIV    2
1363
1364 /*
1365  * This is hardcoded so that the consistency is maintained between SCLK and
1366  * SCLK 2x.
1367  */
1368 #define OV5640_SCLK2X_ROOT_DIV (OV5640_SCLK_ROOT_DIV / 2)
1369
1370 /*
1371  * This is supposed to be ranging from 1 to 8, but the value is always
1372  * set to 1 in the vendor kernels.
1373  */
1374 #define OV5640_PCLK_ROOT_DIV                    1
1375 #define OV5640_PLL_SYS_ROOT_DIVIDER_BYPASS      0x00
1376
1377 static unsigned long ov5640_compute_sys_clk(struct ov5640_dev *sensor,
1378                                             u8 pll_prediv, u8 pll_mult,
1379                                             u8 sysdiv)
1380 {
1381         unsigned long sysclk = sensor->xclk_freq / pll_prediv * pll_mult;
1382
1383         /* PLL1 output cannot exceed 1GHz. */
1384         if (sysclk / 1000000 > 1000)
1385                 return 0;
1386
1387         return sysclk / sysdiv;
1388 }
1389
1390 static unsigned long ov5640_calc_sys_clk(struct ov5640_dev *sensor,
1391                                          unsigned long rate,
1392                                          u8 *pll_prediv, u8 *pll_mult,
1393                                          u8 *sysdiv)
1394 {
1395         unsigned long best = ~0;
1396         u8 best_sysdiv = 1, best_mult = 1;
1397         u8 _sysdiv, _pll_mult;
1398
1399         for (_sysdiv = OV5640_SYSDIV_MIN;
1400              _sysdiv <= OV5640_SYSDIV_MAX;
1401              _sysdiv++) {
1402                 for (_pll_mult = OV5640_PLL_MULT_MIN;
1403                      _pll_mult <= OV5640_PLL_MULT_MAX;
1404                      _pll_mult++) {
1405                         unsigned long _rate;
1406
1407                         /*
1408                          * The PLL multiplier cannot be odd if above
1409                          * 127.
1410                          */
1411                         if (_pll_mult > 127 && (_pll_mult % 2))
1412                                 continue;
1413
1414                         _rate = ov5640_compute_sys_clk(sensor,
1415                                                        OV5640_PLL_PREDIV,
1416                                                        _pll_mult, _sysdiv);
1417
1418                         /*
1419                          * We have reached the maximum allowed PLL1 output,
1420                          * increase sysdiv.
1421                          */
1422                         if (!_rate)
1423                                 break;
1424
1425                         /*
1426                          * Prefer rates above the expected clock rate than
1427                          * below, even if that means being less precise.
1428                          */
1429                         if (_rate < rate)
1430                                 continue;
1431
1432                         if (abs(rate - _rate) < abs(rate - best)) {
1433                                 best = _rate;
1434                                 best_sysdiv = _sysdiv;
1435                                 best_mult = _pll_mult;
1436                         }
1437
1438                         if (_rate == rate)
1439                                 goto out;
1440                 }
1441         }
1442
1443 out:
1444         *sysdiv = best_sysdiv;
1445         *pll_prediv = OV5640_PLL_PREDIV;
1446         *pll_mult = best_mult;
1447
1448         return best;
1449 }
1450
1451 /*
1452  * ov5640_set_mipi_pclk() - Calculate the clock tree configuration values
1453  *                          for the MIPI CSI-2 output.
1454  */
1455 static int ov5640_set_mipi_pclk(struct ov5640_dev *sensor)
1456 {
1457         u8 bit_div, mipi_div, pclk_div, sclk_div, sclk2x_div, root_div;
1458         u8 prediv, mult, sysdiv;
1459         unsigned long link_freq;
1460         unsigned long sysclk;
1461         u8 pclk_period;
1462         u32 sample_rate;
1463         u32 num_lanes;
1464         int ret;
1465
1466         /* Use the link freq computed at ov5640_update_pixel_rate() time. */
1467         link_freq = sensor->current_link_freq;
1468
1469         /*
1470          * - mipi_div - Additional divider for the MIPI lane clock.
1471          *
1472          * Higher link frequencies would make sysclk > 1GHz.
1473          * Keep the sysclk low and do not divide in the MIPI domain.
1474          */
1475         if (link_freq > OV5640_LINK_RATE_MAX)
1476                 mipi_div = 1;
1477         else
1478                 mipi_div = 2;
1479
1480         sysclk = link_freq * mipi_div;
1481         ov5640_calc_sys_clk(sensor, sysclk, &prediv, &mult, &sysdiv);
1482
1483         /*
1484          * Adjust PLL parameters to maintain the MIPI_SCLK-to-PCLK ratio.
1485          *
1486          * - root_div = 2 (fixed)
1487          * - bit_div : MIPI 8-bit = 2; MIPI 10-bit = 2.5
1488          * - pclk_div = 1 (fixed)
1489          * - p_div  = (2 lanes ? mipi_div : 2 * mipi_div)
1490          *
1491          * This results in the following MIPI_SCLK depending on the number
1492          * of lanes:
1493          *
1494          * - 2 lanes: MIPI_SCLK = (4 or 5) * PCLK
1495          * - 1 lanes: MIPI_SCLK = (8 or 10) * PCLK
1496          */
1497         root_div = OV5640_PLL_CTRL3_PLL_ROOT_DIV_2;
1498         bit_div =  OV5640_PLL_CTRL0_MIPI_MODE_8BIT;
1499         pclk_div = ilog2(OV5640_PCLK_ROOT_DIV);
1500
1501         /*
1502          * Scaler clock:
1503          * - YUV: PCLK >= 2 * SCLK
1504          * - RAW or JPEG: PCLK >= SCLK
1505          * - sclk2x_div = sclk_div / 2
1506          */
1507         sclk_div = ilog2(OV5640_SCLK_ROOT_DIV);
1508         sclk2x_div = ilog2(OV5640_SCLK2X_ROOT_DIV);
1509
1510         /*
1511          * Set the pixel clock period expressed in ns with 1-bit decimal
1512          * (0x01=0.5ns).
1513          *
1514          * The register is very briefly documented. In the OV5645 datasheet it
1515          * is described as (2 * pclk period), and from testing it seems the
1516          * actual definition is 2 * 8-bit sample period.
1517          *
1518          * 2 * sample_period = (mipi_clk * 2 * num_lanes / bpp) * (bpp / 8) / 2
1519          */
1520         num_lanes = sensor->ep.bus.mipi_csi2.num_data_lanes;
1521         sample_rate = (link_freq * mipi_div * num_lanes * 2) / 16;
1522         pclk_period = 2000000000UL / sample_rate;
1523
1524         /* Program the clock tree registers. */
1525         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL0, 0x0f, bit_div);
1526         if (ret)
1527                 return ret;
1528
1529         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL1, 0xff,
1530                              (sysdiv << 4) | mipi_div);
1531         if (ret)
1532                 return ret;
1533
1534         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL2, 0xff, mult);
1535         if (ret)
1536                 return ret;
1537
1538         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL3, 0x1f,
1539                              root_div | prediv);
1540         if (ret)
1541                 return ret;
1542
1543         ret = ov5640_mod_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, 0x3f,
1544                              (pclk_div << 4) | (sclk2x_div << 2) | sclk_div);
1545         if (ret)
1546                 return ret;
1547
1548         return ov5640_write_reg(sensor, OV5640_REG_PCLK_PERIOD, pclk_period);
1549 }
1550
1551 static u32 ov5640_calc_pixel_rate(struct ov5640_dev *sensor)
1552 {
1553         const struct ov5640_mode_info *mode = sensor->current_mode;
1554         const struct ov5640_timings *timings = &mode->dvp_timings;
1555         u32 rate;
1556
1557         rate = timings->htot * (timings->crop.height + timings->vblank_def);
1558         rate *= ov5640_framerates[sensor->current_fr];
1559
1560         return rate;
1561 }
1562
1563 static unsigned long ov5640_calc_pclk(struct ov5640_dev *sensor,
1564                                       unsigned long rate,
1565                                       u8 *pll_prediv, u8 *pll_mult, u8 *sysdiv,
1566                                       u8 *pll_rdiv, u8 *bit_div, u8 *pclk_div)
1567 {
1568         unsigned long _rate = rate * OV5640_PLL_ROOT_DIV * OV5640_BIT_DIV *
1569                                 OV5640_PCLK_ROOT_DIV;
1570
1571         _rate = ov5640_calc_sys_clk(sensor, _rate, pll_prediv, pll_mult,
1572                                     sysdiv);
1573         *pll_rdiv = OV5640_PLL_ROOT_DIV;
1574         *bit_div = OV5640_BIT_DIV;
1575         *pclk_div = OV5640_PCLK_ROOT_DIV;
1576
1577         return _rate / *pll_rdiv / *bit_div / *pclk_div;
1578 }
1579
1580 static int ov5640_set_dvp_pclk(struct ov5640_dev *sensor)
1581 {
1582         u8 prediv, mult, sysdiv, pll_rdiv, bit_div, pclk_div;
1583         u32 rate;
1584         int ret;
1585
1586         rate = ov5640_calc_pixel_rate(sensor);
1587         rate *= ov5640_code_to_bpp(sensor, sensor->fmt.code);
1588         rate /= sensor->ep.bus.parallel.bus_width;
1589
1590         ov5640_calc_pclk(sensor, rate, &prediv, &mult, &sysdiv, &pll_rdiv,
1591                          &bit_div, &pclk_div);
1592
1593         if (bit_div == 2)
1594                 bit_div = 8;
1595
1596         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL0,
1597                              0x0f, bit_div);
1598         if (ret)
1599                 return ret;
1600
1601         /*
1602          * We need to set sysdiv according to the clock, and to clear
1603          * the MIPI divider.
1604          */
1605         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL1,
1606                              0xff, sysdiv << 4);
1607         if (ret)
1608                 return ret;
1609
1610         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL2,
1611                              0xff, mult);
1612         if (ret)
1613                 return ret;
1614
1615         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL3,
1616                              0x1f, prediv | ((pll_rdiv - 1) << 4));
1617         if (ret)
1618                 return ret;
1619
1620         return ov5640_mod_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, 0x30,
1621                               (ilog2(pclk_div) << 4));
1622 }
1623
1624 /* set JPEG framing sizes */
1625 static int ov5640_set_jpeg_timings(struct ov5640_dev *sensor,
1626                                    const struct ov5640_mode_info *mode)
1627 {
1628         int ret;
1629
1630         /*
1631          * compression mode 3 timing
1632          *
1633          * Data is transmitted with programmable width (VFIFO_HSIZE).
1634          * No padding done. Last line may have less data. Varying
1635          * number of lines per frame, depending on amount of data.
1636          */
1637         ret = ov5640_mod_reg(sensor, OV5640_REG_JPG_MODE_SELECT, 0x7, 0x3);
1638         if (ret < 0)
1639                 return ret;
1640
1641         ret = ov5640_write_reg16(sensor, OV5640_REG_VFIFO_HSIZE, mode->width);
1642         if (ret < 0)
1643                 return ret;
1644
1645         return ov5640_write_reg16(sensor, OV5640_REG_VFIFO_VSIZE, mode->height);
1646 }
1647
1648 /* download ov5640 settings to sensor through i2c */
1649 static int ov5640_set_timings(struct ov5640_dev *sensor,
1650                               const struct ov5640_mode_info *mode)
1651 {
1652         const struct ov5640_timings *timings;
1653         const struct v4l2_rect *analog_crop;
1654         const struct v4l2_rect *crop;
1655         int ret;
1656
1657         if (sensor->fmt.code == MEDIA_BUS_FMT_JPEG_1X8) {
1658                 ret = ov5640_set_jpeg_timings(sensor, mode);
1659                 if (ret < 0)
1660                         return ret;
1661         }
1662
1663         timings = ov5640_timings(sensor, mode);
1664         analog_crop = &timings->analog_crop;
1665         crop = &timings->crop;
1666
1667         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_HS,
1668                                  analog_crop->left);
1669         if (ret < 0)
1670                 return ret;
1671
1672         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_VS,
1673                                  analog_crop->top);
1674         if (ret < 0)
1675                 return ret;
1676
1677         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_HW,
1678                                  analog_crop->left + analog_crop->width - 1);
1679         if (ret < 0)
1680                 return ret;
1681
1682         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_VH,
1683                                  analog_crop->top + analog_crop->height - 1);
1684         if (ret < 0)
1685                 return ret;
1686
1687         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_HOFFS, crop->left);
1688         if (ret < 0)
1689                 return ret;
1690
1691         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_VOFFS, crop->top);
1692         if (ret < 0)
1693                 return ret;
1694
1695         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_DVPHO, mode->width);
1696         if (ret < 0)
1697                 return ret;
1698
1699         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_DVPVO, mode->height);
1700         if (ret < 0)
1701                 return ret;
1702
1703         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_HTS, timings->htot);
1704         if (ret < 0)
1705                 return ret;
1706
1707         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_VTS,
1708                                  mode->height + timings->vblank_def);
1709         if (ret < 0)
1710                 return ret;
1711
1712         return 0;
1713 }
1714
1715 static void ov5640_load_regs(struct ov5640_dev *sensor,
1716                              const struct reg_value *regs, unsigned int regnum)
1717 {
1718         unsigned int i;
1719         u32 delay_ms;
1720         u16 reg_addr;
1721         u8 mask, val;
1722         int ret = 0;
1723
1724         for (i = 0; i < regnum; ++i, ++regs) {
1725                 delay_ms = regs->delay_ms;
1726                 reg_addr = regs->reg_addr;
1727                 val = regs->val;
1728                 mask = regs->mask;
1729
1730                 /* remain in power down mode for DVP */
1731                 if (regs->reg_addr == OV5640_REG_SYS_CTRL0 &&
1732                     val == OV5640_REG_SYS_CTRL0_SW_PWUP &&
1733                     !ov5640_is_csi2(sensor))
1734                         continue;
1735
1736                 if (mask)
1737                         ret = ov5640_mod_reg(sensor, reg_addr, mask, val);
1738                 else
1739                         ret = ov5640_write_reg(sensor, reg_addr, val);
1740                 if (ret)
1741                         break;
1742
1743                 if (delay_ms)
1744                         usleep_range(1000 * delay_ms, 1000 * delay_ms + 100);
1745         }
1746 }
1747
1748 static int ov5640_set_autoexposure(struct ov5640_dev *sensor, bool on)
1749 {
1750         return ov5640_mod_reg(sensor, OV5640_REG_AEC_PK_MANUAL,
1751                               BIT(0), on ? 0 : BIT(0));
1752 }
1753
1754 /* read exposure, in number of line periods */
1755 static int ov5640_get_exposure(struct ov5640_dev *sensor)
1756 {
1757         int exp, ret;
1758         u8 temp;
1759
1760         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_PK_EXPOSURE_HI, &temp);
1761         if (ret)
1762                 return ret;
1763         exp = ((int)temp & 0x0f) << 16;
1764         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_PK_EXPOSURE_MED, &temp);
1765         if (ret)
1766                 return ret;
1767         exp |= ((int)temp << 8);
1768         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_PK_EXPOSURE_LO, &temp);
1769         if (ret)
1770                 return ret;
1771         exp |= (int)temp;
1772
1773         return exp >> 4;
1774 }
1775
1776 /* write exposure, given number of line periods */
1777 static int ov5640_set_exposure(struct ov5640_dev *sensor, u32 exposure)
1778 {
1779         int ret;
1780
1781         exposure <<= 4;
1782
1783         ret = ov5640_write_reg(sensor,
1784                                OV5640_REG_AEC_PK_EXPOSURE_LO,
1785                                exposure & 0xff);
1786         if (ret)
1787                 return ret;
1788         ret = ov5640_write_reg(sensor,
1789                                OV5640_REG_AEC_PK_EXPOSURE_MED,
1790                                (exposure >> 8) & 0xff);
1791         if (ret)
1792                 return ret;
1793         return ov5640_write_reg(sensor,
1794                                 OV5640_REG_AEC_PK_EXPOSURE_HI,
1795                                 (exposure >> 16) & 0x0f);
1796 }
1797
1798 static int ov5640_get_gain(struct ov5640_dev *sensor)
1799 {
1800         u16 gain;
1801         int ret;
1802
1803         ret = ov5640_read_reg16(sensor, OV5640_REG_AEC_PK_REAL_GAIN, &gain);
1804         if (ret)
1805                 return ret;
1806
1807         return gain & 0x3ff;
1808 }
1809
1810 static int ov5640_set_gain(struct ov5640_dev *sensor, int gain)
1811 {
1812         return ov5640_write_reg16(sensor, OV5640_REG_AEC_PK_REAL_GAIN,
1813                                   (u16)gain & 0x3ff);
1814 }
1815
1816 static int ov5640_set_autogain(struct ov5640_dev *sensor, bool on)
1817 {
1818         return ov5640_mod_reg(sensor, OV5640_REG_AEC_PK_MANUAL,
1819                               BIT(1), on ? 0 : BIT(1));
1820 }
1821
1822 static int ov5640_set_stream_dvp(struct ov5640_dev *sensor, bool on)
1823 {
1824         return ov5640_write_reg(sensor, OV5640_REG_SYS_CTRL0, on ?
1825                                 OV5640_REG_SYS_CTRL0_SW_PWUP :
1826                                 OV5640_REG_SYS_CTRL0_SW_PWDN);
1827 }
1828
1829 static int ov5640_set_stream_mipi(struct ov5640_dev *sensor, bool on)
1830 {
1831         int ret;
1832
1833         /*
1834          * Enable/disable the MIPI interface
1835          *
1836          * 0x300e = on ? 0x45 : 0x40
1837          *
1838          * FIXME: the sensor manual (version 2.03) reports
1839          * [7:5] = 000  : 1 data lane mode
1840          * [7:5] = 001  : 2 data lanes mode
1841          * But this settings do not work, while the following ones
1842          * have been validated for 2 data lanes mode.
1843          *
1844          * [7:5] = 010  : 2 data lanes mode
1845          * [4] = 0      : Power up MIPI HS Tx
1846          * [3] = 0      : Power up MIPI LS Rx
1847          * [2] = 1/0    : MIPI interface enable/disable
1848          * [1:0] = 01/00: FIXME: 'debug'
1849          */
1850         ret = ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00,
1851                                on ? 0x45 : 0x40);
1852         if (ret)
1853                 return ret;
1854
1855         return ov5640_write_reg(sensor, OV5640_REG_FRAME_CTRL01,
1856                                 on ? 0x00 : 0x0f);
1857 }
1858
1859 static int ov5640_get_sysclk(struct ov5640_dev *sensor)
1860 {
1861          /* calculate sysclk */
1862         u32 xvclk = sensor->xclk_freq / 10000;
1863         u32 multiplier, prediv, VCO, sysdiv, pll_rdiv;
1864         u32 sclk_rdiv_map[] = {1, 2, 4, 8};
1865         u32 bit_div2x = 1, sclk_rdiv, sysclk;
1866         u8 temp1, temp2;
1867         int ret;
1868
1869         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL0, &temp1);
1870         if (ret)
1871                 return ret;
1872         temp2 = temp1 & 0x0f;
1873         if (temp2 == 8 || temp2 == 10)
1874                 bit_div2x = temp2 / 2;
1875
1876         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL1, &temp1);
1877         if (ret)
1878                 return ret;
1879         sysdiv = temp1 >> 4;
1880         if (sysdiv == 0)
1881                 sysdiv = 16;
1882
1883         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL2, &temp1);
1884         if (ret)
1885                 return ret;
1886         multiplier = temp1;
1887
1888         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL3, &temp1);
1889         if (ret)
1890                 return ret;
1891         prediv = temp1 & 0x0f;
1892         pll_rdiv = ((temp1 >> 4) & 0x01) + 1;
1893
1894         ret = ov5640_read_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, &temp1);
1895         if (ret)
1896                 return ret;
1897         temp2 = temp1 & 0x03;
1898         sclk_rdiv = sclk_rdiv_map[temp2];
1899
1900         if (!prediv || !sysdiv || !pll_rdiv || !bit_div2x)
1901                 return -EINVAL;
1902
1903         VCO = xvclk * multiplier / prediv;
1904
1905         sysclk = VCO / sysdiv / pll_rdiv * 2 / bit_div2x / sclk_rdiv;
1906
1907         return sysclk;
1908 }
1909
1910 static int ov5640_set_night_mode(struct ov5640_dev *sensor)
1911 {
1912          /* read HTS from register settings */
1913         u8 mode;
1914         int ret;
1915
1916         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_CTRL00, &mode);
1917         if (ret)
1918                 return ret;
1919         mode &= 0xfb;
1920         return ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL00, mode);
1921 }
1922
1923 static int ov5640_get_hts(struct ov5640_dev *sensor)
1924 {
1925         /* read HTS from register settings */
1926         u16 hts;
1927         int ret;
1928
1929         ret = ov5640_read_reg16(sensor, OV5640_REG_TIMING_HTS, &hts);
1930         if (ret)
1931                 return ret;
1932         return hts;
1933 }
1934
1935 static int ov5640_get_vts(struct ov5640_dev *sensor)
1936 {
1937         u16 vts;
1938         int ret;
1939
1940         ret = ov5640_read_reg16(sensor, OV5640_REG_TIMING_VTS, &vts);
1941         if (ret)
1942                 return ret;
1943         return vts;
1944 }
1945
1946 static int ov5640_set_vts(struct ov5640_dev *sensor, int vts)
1947 {
1948         return ov5640_write_reg16(sensor, OV5640_REG_TIMING_VTS, vts);
1949 }
1950
1951 static int ov5640_get_light_freq(struct ov5640_dev *sensor)
1952 {
1953         /* get banding filter value */
1954         int ret, light_freq = 0;
1955         u8 temp, temp1;
1956
1957         ret = ov5640_read_reg(sensor, OV5640_REG_HZ5060_CTRL01, &temp);
1958         if (ret)
1959                 return ret;
1960
1961         if (temp & 0x80) {
1962                 /* manual */
1963                 ret = ov5640_read_reg(sensor, OV5640_REG_HZ5060_CTRL00,
1964                                       &temp1);
1965                 if (ret)
1966                         return ret;
1967                 if (temp1 & 0x04) {
1968                         /* 50Hz */
1969                         light_freq = 50;
1970                 } else {
1971                         /* 60Hz */
1972                         light_freq = 60;
1973                 }
1974         } else {
1975                 /* auto */
1976                 ret = ov5640_read_reg(sensor, OV5640_REG_SIGMADELTA_CTRL0C,
1977                                       &temp1);
1978                 if (ret)
1979                         return ret;
1980
1981                 if (temp1 & 0x01) {
1982                         /* 50Hz */
1983                         light_freq = 50;
1984                 } else {
1985                         /* 60Hz */
1986                 }
1987         }
1988
1989         return light_freq;
1990 }
1991
1992 static int ov5640_set_bandingfilter(struct ov5640_dev *sensor)
1993 {
1994         u32 band_step60, max_band60, band_step50, max_band50, prev_vts;
1995         int ret;
1996
1997         /* read preview PCLK */
1998         ret = ov5640_get_sysclk(sensor);
1999         if (ret < 0)
2000                 return ret;
2001         if (ret == 0)
2002                 return -EINVAL;
2003         sensor->prev_sysclk = ret;
2004         /* read preview HTS */
2005         ret = ov5640_get_hts(sensor);
2006         if (ret < 0)
2007                 return ret;
2008         if (ret == 0)
2009                 return -EINVAL;
2010         sensor->prev_hts = ret;
2011
2012         /* read preview VTS */
2013         ret = ov5640_get_vts(sensor);
2014         if (ret < 0)
2015                 return ret;
2016         prev_vts = ret;
2017
2018         /* calculate banding filter */
2019         /* 60Hz */
2020         band_step60 = sensor->prev_sysclk * 100 / sensor->prev_hts * 100 / 120;
2021         ret = ov5640_write_reg16(sensor, OV5640_REG_AEC_B60_STEP, band_step60);
2022         if (ret)
2023                 return ret;
2024         if (!band_step60)
2025                 return -EINVAL;
2026         max_band60 = (int)((prev_vts - 4) / band_step60);
2027         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL0D, max_band60);
2028         if (ret)
2029                 return ret;
2030
2031         /* 50Hz */
2032         band_step50 = sensor->prev_sysclk * 100 / sensor->prev_hts;
2033         ret = ov5640_write_reg16(sensor, OV5640_REG_AEC_B50_STEP, band_step50);
2034         if (ret)
2035                 return ret;
2036         if (!band_step50)
2037                 return -EINVAL;
2038         max_band50 = (int)((prev_vts - 4) / band_step50);
2039         return ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL0E, max_band50);
2040 }
2041
2042 static int ov5640_set_ae_target(struct ov5640_dev *sensor, int target)
2043 {
2044         /* stable in high */
2045         u32 fast_high, fast_low;
2046         int ret;
2047
2048         sensor->ae_low = target * 23 / 25;      /* 0.92 */
2049         sensor->ae_high = target * 27 / 25;     /* 1.08 */
2050
2051         fast_high = sensor->ae_high << 1;
2052         if (fast_high > 255)
2053                 fast_high = 255;
2054
2055         fast_low = sensor->ae_low >> 1;
2056
2057         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL0F, sensor->ae_high);
2058         if (ret)
2059                 return ret;
2060         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL10, sensor->ae_low);
2061         if (ret)
2062                 return ret;
2063         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL1B, sensor->ae_high);
2064         if (ret)
2065                 return ret;
2066         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL1E, sensor->ae_low);
2067         if (ret)
2068                 return ret;
2069         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL11, fast_high);
2070         if (ret)
2071                 return ret;
2072         return ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL1F, fast_low);
2073 }
2074
2075 static int ov5640_get_binning(struct ov5640_dev *sensor)
2076 {
2077         u8 temp;
2078         int ret;
2079
2080         ret = ov5640_read_reg(sensor, OV5640_REG_TIMING_TC_REG21, &temp);
2081         if (ret)
2082                 return ret;
2083
2084         return temp & BIT(0);
2085 }
2086
2087 static int ov5640_set_binning(struct ov5640_dev *sensor, bool enable)
2088 {
2089         int ret;
2090
2091         /*
2092          * TIMING TC REG21:
2093          * - [0]:       Horizontal binning enable
2094          */
2095         ret = ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG21,
2096                              BIT(0), enable ? BIT(0) : 0);
2097         if (ret)
2098                 return ret;
2099         /*
2100          * TIMING TC REG20:
2101          * - [0]:       Undocumented, but hardcoded init sequences
2102          *              are always setting REG21/REG20 bit 0 to same value...
2103          */
2104         return ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG20,
2105                               BIT(0), enable ? BIT(0) : 0);
2106 }
2107
2108 static int ov5640_set_virtual_channel(struct ov5640_dev *sensor)
2109 {
2110         struct i2c_client *client = sensor->i2c_client;
2111         u8 temp, channel = virtual_channel;
2112         int ret;
2113
2114         if (channel > 3) {
2115                 dev_err(&client->dev,
2116                         "%s: wrong virtual_channel parameter, expected (0..3), got %d\n",
2117                         __func__, channel);
2118                 return -EINVAL;
2119         }
2120
2121         ret = ov5640_read_reg(sensor, OV5640_REG_DEBUG_MODE, &temp);
2122         if (ret)
2123                 return ret;
2124         temp &= ~(3 << 6);
2125         temp |= (channel << 6);
2126         return ov5640_write_reg(sensor, OV5640_REG_DEBUG_MODE, temp);
2127 }
2128
2129 static const struct ov5640_mode_info *
2130 ov5640_find_mode(struct ov5640_dev *sensor, int width, int height, bool nearest)
2131 {
2132         const struct ov5640_mode_info *mode;
2133
2134         mode = v4l2_find_nearest_size(ov5640_mode_data,
2135                                       ARRAY_SIZE(ov5640_mode_data),
2136                                       width, height, width, height);
2137
2138         if (!mode ||
2139             (!nearest &&
2140              (mode->width != width || mode->height != height)))
2141                 return NULL;
2142
2143         return mode;
2144 }
2145
2146 /*
2147  * sensor changes between scaling and subsampling, go through
2148  * exposure calculation
2149  */
2150 static int ov5640_set_mode_exposure_calc(struct ov5640_dev *sensor,
2151                                          const struct ov5640_mode_info *mode)
2152 {
2153         u32 prev_shutter, prev_gain16;
2154         u32 cap_shutter, cap_gain16;
2155         u32 cap_sysclk, cap_hts, cap_vts;
2156         u32 light_freq, cap_bandfilt, cap_maxband;
2157         u32 cap_gain16_shutter;
2158         u8 average;
2159         int ret;
2160
2161         if (!mode->reg_data)
2162                 return -EINVAL;
2163
2164         /* read preview shutter */
2165         ret = ov5640_get_exposure(sensor);
2166         if (ret < 0)
2167                 return ret;
2168         prev_shutter = ret;
2169         ret = ov5640_get_binning(sensor);
2170         if (ret < 0)
2171                 return ret;
2172         if (ret && mode->id != OV5640_MODE_720P_1280_720 &&
2173             mode->id != OV5640_MODE_1080P_1920_1080)
2174                 prev_shutter *= 2;
2175
2176         /* read preview gain */
2177         ret = ov5640_get_gain(sensor);
2178         if (ret < 0)
2179                 return ret;
2180         prev_gain16 = ret;
2181
2182         /* get average */
2183         ret = ov5640_read_reg(sensor, OV5640_REG_AVG_READOUT, &average);
2184         if (ret)
2185                 return ret;
2186
2187         /* turn off night mode for capture */
2188         ret = ov5640_set_night_mode(sensor);
2189         if (ret < 0)
2190                 return ret;
2191
2192         /* Write capture setting */
2193         ov5640_load_regs(sensor, mode->reg_data, mode->reg_data_size);
2194         ret = ov5640_set_timings(sensor, mode);
2195         if (ret < 0)
2196                 return ret;
2197
2198         /* read capture VTS */
2199         ret = ov5640_get_vts(sensor);
2200         if (ret < 0)
2201                 return ret;
2202         cap_vts = ret;
2203         ret = ov5640_get_hts(sensor);
2204         if (ret < 0)
2205                 return ret;
2206         if (ret == 0)
2207                 return -EINVAL;
2208         cap_hts = ret;
2209
2210         ret = ov5640_get_sysclk(sensor);
2211         if (ret < 0)
2212                 return ret;
2213         if (ret == 0)
2214                 return -EINVAL;
2215         cap_sysclk = ret;
2216
2217         /* calculate capture banding filter */
2218         ret = ov5640_get_light_freq(sensor);
2219         if (ret < 0)
2220                 return ret;
2221         light_freq = ret;
2222
2223         if (light_freq == 60) {
2224                 /* 60Hz */
2225                 cap_bandfilt = cap_sysclk * 100 / cap_hts * 100 / 120;
2226         } else {
2227                 /* 50Hz */
2228                 cap_bandfilt = cap_sysclk * 100 / cap_hts;
2229         }
2230
2231         if (!sensor->prev_sysclk) {
2232                 ret = ov5640_get_sysclk(sensor);
2233                 if (ret < 0)
2234                         return ret;
2235                 if (ret == 0)
2236                         return -EINVAL;
2237                 sensor->prev_sysclk = ret;
2238         }
2239
2240         if (!cap_bandfilt)
2241                 return -EINVAL;
2242
2243         cap_maxband = (int)((cap_vts - 4) / cap_bandfilt);
2244
2245         /* calculate capture shutter/gain16 */
2246         if (average > sensor->ae_low && average < sensor->ae_high) {
2247                 /* in stable range */
2248                 cap_gain16_shutter =
2249                         prev_gain16 * prev_shutter *
2250                         cap_sysclk / sensor->prev_sysclk *
2251                         sensor->prev_hts / cap_hts *
2252                         sensor->ae_target / average;
2253         } else {
2254                 cap_gain16_shutter =
2255                         prev_gain16 * prev_shutter *
2256                         cap_sysclk / sensor->prev_sysclk *
2257                         sensor->prev_hts / cap_hts;
2258         }
2259
2260         /* gain to shutter */
2261         if (cap_gain16_shutter < (cap_bandfilt * 16)) {
2262                 /* shutter < 1/100 */
2263                 cap_shutter = cap_gain16_shutter / 16;
2264                 if (cap_shutter < 1)
2265                         cap_shutter = 1;
2266
2267                 cap_gain16 = cap_gain16_shutter / cap_shutter;
2268                 if (cap_gain16 < 16)
2269                         cap_gain16 = 16;
2270         } else {
2271                 if (cap_gain16_shutter > (cap_bandfilt * cap_maxband * 16)) {
2272                         /* exposure reach max */
2273                         cap_shutter = cap_bandfilt * cap_maxband;
2274                         if (!cap_shutter)
2275                                 return -EINVAL;
2276
2277                         cap_gain16 = cap_gain16_shutter / cap_shutter;
2278                 } else {
2279                         /* 1/100 < (cap_shutter = n/100) =< max */
2280                         cap_shutter =
2281                                 ((int)(cap_gain16_shutter / 16 / cap_bandfilt))
2282                                 * cap_bandfilt;
2283                         if (!cap_shutter)
2284                                 return -EINVAL;
2285
2286                         cap_gain16 = cap_gain16_shutter / cap_shutter;
2287                 }
2288         }
2289
2290         /* set capture gain */
2291         ret = ov5640_set_gain(sensor, cap_gain16);
2292         if (ret)
2293                 return ret;
2294
2295         /* write capture shutter */
2296         if (cap_shutter > (cap_vts - 4)) {
2297                 cap_vts = cap_shutter + 4;
2298                 ret = ov5640_set_vts(sensor, cap_vts);
2299                 if (ret < 0)
2300                         return ret;
2301         }
2302
2303         /* set exposure */
2304         return ov5640_set_exposure(sensor, cap_shutter);
2305 }
2306
2307 /*
2308  * if sensor changes inside scaling or subsampling
2309  * change mode directly
2310  */
2311 static int ov5640_set_mode_direct(struct ov5640_dev *sensor,
2312                                   const struct ov5640_mode_info *mode)
2313 {
2314         if (!mode->reg_data)
2315                 return -EINVAL;
2316
2317         /* Write capture setting */
2318         ov5640_load_regs(sensor, mode->reg_data, mode->reg_data_size);
2319         return ov5640_set_timings(sensor, mode);
2320 }
2321
2322 static int ov5640_set_mode(struct ov5640_dev *sensor)
2323 {
2324         const struct ov5640_mode_info *mode = sensor->current_mode;
2325         const struct ov5640_mode_info *orig_mode = sensor->last_mode;
2326         enum ov5640_downsize_mode dn_mode, orig_dn_mode;
2327         bool auto_gain = sensor->ctrls.auto_gain->val == 1;
2328         bool auto_exp =  sensor->ctrls.auto_exp->val == V4L2_EXPOSURE_AUTO;
2329         int ret;
2330
2331         dn_mode = mode->dn_mode;
2332         orig_dn_mode = orig_mode->dn_mode;
2333
2334         /* auto gain and exposure must be turned off when changing modes */
2335         if (auto_gain) {
2336                 ret = ov5640_set_autogain(sensor, false);
2337                 if (ret)
2338                         return ret;
2339         }
2340
2341         if (auto_exp) {
2342                 ret = ov5640_set_autoexposure(sensor, false);
2343                 if (ret)
2344                         goto restore_auto_gain;
2345         }
2346
2347         if (ov5640_is_csi2(sensor))
2348                 ret = ov5640_set_mipi_pclk(sensor);
2349         else
2350                 ret = ov5640_set_dvp_pclk(sensor);
2351         if (ret < 0)
2352                 return 0;
2353
2354         if ((dn_mode == SUBSAMPLING && orig_dn_mode == SCALING) ||
2355             (dn_mode == SCALING && orig_dn_mode == SUBSAMPLING)) {
2356                 /*
2357                  * change between subsampling and scaling
2358                  * go through exposure calculation
2359                  */
2360                 ret = ov5640_set_mode_exposure_calc(sensor, mode);
2361         } else {
2362                 /*
2363                  * change inside subsampling or scaling
2364                  * download firmware directly
2365                  */
2366                 ret = ov5640_set_mode_direct(sensor, mode);
2367         }
2368         if (ret < 0)
2369                 goto restore_auto_exp_gain;
2370
2371         /* restore auto gain and exposure */
2372         if (auto_gain)
2373                 ov5640_set_autogain(sensor, true);
2374         if (auto_exp)
2375                 ov5640_set_autoexposure(sensor, true);
2376
2377         ret = ov5640_set_binning(sensor, dn_mode != SCALING);
2378         if (ret < 0)
2379                 return ret;
2380         ret = ov5640_set_ae_target(sensor, sensor->ae_target);
2381         if (ret < 0)
2382                 return ret;
2383         ret = ov5640_get_light_freq(sensor);
2384         if (ret < 0)
2385                 return ret;
2386         ret = ov5640_set_bandingfilter(sensor);
2387         if (ret < 0)
2388                 return ret;
2389         ret = ov5640_set_virtual_channel(sensor);
2390         if (ret < 0)
2391                 return ret;
2392
2393         sensor->pending_mode_change = false;
2394         sensor->last_mode = mode;
2395
2396         return 0;
2397
2398 restore_auto_exp_gain:
2399         if (auto_exp)
2400                 ov5640_set_autoexposure(sensor, true);
2401 restore_auto_gain:
2402         if (auto_gain)
2403                 ov5640_set_autogain(sensor, true);
2404
2405         return ret;
2406 }
2407
2408 static int ov5640_set_framefmt(struct ov5640_dev *sensor,
2409                                struct v4l2_mbus_framefmt *format);
2410
2411 /* restore the last set video mode after chip power-on */
2412 static int ov5640_restore_mode(struct ov5640_dev *sensor)
2413 {
2414         int ret;
2415
2416         /* first load the initial register values */
2417         ov5640_load_regs(sensor, ov5640_init_setting,
2418                          ARRAY_SIZE(ov5640_init_setting));
2419
2420         ret = ov5640_mod_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, 0x3f,
2421                              (ilog2(OV5640_SCLK2X_ROOT_DIV) << 2) |
2422                              ilog2(OV5640_SCLK_ROOT_DIV));
2423         if (ret)
2424                 return ret;
2425
2426         /* now restore the last capture mode */
2427         ret = ov5640_set_mode(sensor);
2428         if (ret < 0)
2429                 return ret;
2430
2431         return ov5640_set_framefmt(sensor, &sensor->fmt);
2432 }
2433
2434 static void ov5640_power(struct ov5640_dev *sensor, bool enable)
2435 {
2436         gpiod_set_value_cansleep(sensor->pwdn_gpio, enable ? 0 : 1);
2437 }
2438
2439 /*
2440  * From section 2.7 power up sequence:
2441  * t0 + t1 + t2 >= 5ms  Delay from DOVDD stable to PWDN pull down
2442  * t3 >= 1ms            Delay from PWDN pull down to RESETB pull up
2443  * t4 >= 20ms           Delay from RESETB pull up to SCCB (i2c) stable
2444  *
2445  * Some modules don't expose RESETB/PWDN pins directly, instead providing a
2446  * "PWUP" GPIO which is wired through appropriate delays and inverters to the
2447  * pins.
2448  *
2449  * In such cases, this gpio should be mapped to pwdn_gpio in the driver, and we
2450  * should still toggle the pwdn_gpio below with the appropriate delays, while
2451  * the calls to reset_gpio will be ignored.
2452  */
2453 static void ov5640_powerup_sequence(struct ov5640_dev *sensor)
2454 {
2455         if (sensor->pwdn_gpio) {
2456                 gpiod_set_value_cansleep(sensor->reset_gpio, 0);
2457
2458                 /* camera power cycle */
2459                 ov5640_power(sensor, false);
2460                 usleep_range(5000, 10000);
2461                 ov5640_power(sensor, true);
2462                 usleep_range(5000, 10000);
2463
2464                 gpiod_set_value_cansleep(sensor->reset_gpio, 1);
2465                 usleep_range(1000, 2000);
2466
2467                 gpiod_set_value_cansleep(sensor->reset_gpio, 0);
2468         } else {
2469                 /* software reset */
2470                 ov5640_write_reg(sensor, OV5640_REG_SYS_CTRL0,
2471                                  OV5640_REG_SYS_CTRL0_SW_RST);
2472         }
2473         usleep_range(20000, 25000);
2474
2475         /*
2476          * software standby: allows registers programming;
2477          * exit at restore_mode() for CSI, s_stream(1) for DVP
2478          */
2479         ov5640_write_reg(sensor, OV5640_REG_SYS_CTRL0,
2480                          OV5640_REG_SYS_CTRL0_SW_PWDN);
2481 }
2482
2483 static int ov5640_set_power_on(struct ov5640_dev *sensor)
2484 {
2485         struct i2c_client *client = sensor->i2c_client;
2486         int ret;
2487
2488         ret = clk_prepare_enable(sensor->xclk);
2489         if (ret) {
2490                 dev_err(&client->dev, "%s: failed to enable clock\n",
2491                         __func__);
2492                 return ret;
2493         }
2494
2495         ret = regulator_bulk_enable(OV5640_NUM_SUPPLIES,
2496                                     sensor->supplies);
2497         if (ret) {
2498                 dev_err(&client->dev, "%s: failed to enable regulators\n",
2499                         __func__);
2500                 goto xclk_off;
2501         }
2502
2503         ov5640_powerup_sequence(sensor);
2504
2505         ret = ov5640_init_slave_id(sensor);
2506         if (ret)
2507                 goto power_off;
2508
2509         return 0;
2510
2511 power_off:
2512         ov5640_power(sensor, false);
2513         regulator_bulk_disable(OV5640_NUM_SUPPLIES, sensor->supplies);
2514 xclk_off:
2515         clk_disable_unprepare(sensor->xclk);
2516         return ret;
2517 }
2518
2519 static void ov5640_set_power_off(struct ov5640_dev *sensor)
2520 {
2521         ov5640_power(sensor, false);
2522         regulator_bulk_disable(OV5640_NUM_SUPPLIES, sensor->supplies);
2523         clk_disable_unprepare(sensor->xclk);
2524 }
2525
2526 static int ov5640_set_power_mipi(struct ov5640_dev *sensor, bool on)
2527 {
2528         int ret;
2529
2530         if (!on) {
2531                 /* Reset MIPI bus settings to their default values. */
2532                 ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00, 0x58);
2533                 ov5640_write_reg(sensor, OV5640_REG_MIPI_CTRL00, 0x04);
2534                 ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT00, 0x00);
2535                 return 0;
2536         }
2537
2538         /*
2539          * Power up MIPI HS Tx and LS Rx; 2 data lanes mode
2540          *
2541          * 0x300e = 0x40
2542          * [7:5] = 010  : 2 data lanes mode (see FIXME note in
2543          *                "ov5640_set_stream_mipi()")
2544          * [4] = 0      : Power up MIPI HS Tx
2545          * [3] = 0      : Power up MIPI LS Rx
2546          * [2] = 0      : MIPI interface disabled
2547          */
2548         ret = ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00, 0x40);
2549         if (ret)
2550                 return ret;
2551
2552         /*
2553          * Gate clock and set LP11 in 'no packets mode' (idle)
2554          *
2555          * 0x4800 = 0x24
2556          * [5] = 1      : Gate clock when 'no packets'
2557          * [2] = 1      : MIPI bus in LP11 when 'no packets'
2558          */
2559         ret = ov5640_write_reg(sensor, OV5640_REG_MIPI_CTRL00, 0x24);
2560         if (ret)
2561                 return ret;
2562
2563         /*
2564          * Set data lanes and clock in LP11 when 'sleeping'
2565          *
2566          * 0x3019 = 0x70
2567          * [6] = 1      : MIPI data lane 2 in LP11 when 'sleeping'
2568          * [5] = 1      : MIPI data lane 1 in LP11 when 'sleeping'
2569          * [4] = 1      : MIPI clock lane in LP11 when 'sleeping'
2570          */
2571         ret = ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT00, 0x70);
2572         if (ret)
2573                 return ret;
2574
2575         /* Give lanes some time to coax into LP11 state. */
2576         usleep_range(500, 1000);
2577
2578         return 0;
2579 }
2580
2581 static int ov5640_set_power_dvp(struct ov5640_dev *sensor, bool on)
2582 {
2583         unsigned int flags = sensor->ep.bus.parallel.flags;
2584         bool bt656 = sensor->ep.bus_type == V4L2_MBUS_BT656;
2585         u8 polarities = 0;
2586         int ret;
2587
2588         if (!on) {
2589                 /* Reset settings to their default values. */
2590                 ov5640_write_reg(sensor, OV5640_REG_CCIR656_CTRL00, 0x00);
2591                 ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00, 0x58);
2592                 ov5640_write_reg(sensor, OV5640_REG_POLARITY_CTRL00, 0x20);
2593                 ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT_ENABLE01, 0x00);
2594                 ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT_ENABLE02, 0x00);
2595                 return 0;
2596         }
2597
2598         /*
2599          * Note about parallel port configuration.
2600          *
2601          * When configured in parallel mode, the OV5640 will
2602          * output 10 bits data on DVP data lines [9:0].
2603          * If only 8 bits data are wanted, the 8 bits data lines
2604          * of the camera interface must be physically connected
2605          * on the DVP data lines [9:2].
2606          *
2607          * Control lines polarity can be configured through
2608          * devicetree endpoint control lines properties.
2609          * If no endpoint control lines properties are set,
2610          * polarity will be as below:
2611          * - VSYNC:     active high
2612          * - HREF:      active low
2613          * - PCLK:      active low
2614          *
2615          * VSYNC & HREF are not configured if BT656 bus mode is selected
2616          */
2617
2618         /*
2619          * BT656 embedded synchronization configuration
2620          *
2621          * CCIR656 CTRL00
2622          * - [7]:       SYNC code selection (0: auto generate sync code,
2623          *              1: sync code from regs 0x4732-0x4735)
2624          * - [6]:       f value in CCIR656 SYNC code when fixed f value
2625          * - [5]:       Fixed f value
2626          * - [4:3]:     Blank toggle data options (00: data=1'h040/1'h200,
2627          *              01: data from regs 0x4736-0x4738, 10: always keep 0)
2628          * - [1]:       Clip data disable
2629          * - [0]:       CCIR656 mode enable
2630          *
2631          * Default CCIR656 SAV/EAV mode with default codes
2632          * SAV=0xff000080 & EAV=0xff00009d is enabled here with settings:
2633          * - CCIR656 mode enable
2634          * - auto generation of sync codes
2635          * - blank toggle data 1'h040/1'h200
2636          * - clip reserved data (0x00 & 0xff changed to 0x01 & 0xfe)
2637          */
2638         ret = ov5640_write_reg(sensor, OV5640_REG_CCIR656_CTRL00,
2639                                bt656 ? 0x01 : 0x00);
2640         if (ret)
2641                 return ret;
2642
2643         /*
2644          * configure parallel port control lines polarity
2645          *
2646          * POLARITY CTRL0
2647          * - [5]:       PCLK polarity (0: active low, 1: active high)
2648          * - [1]:       HREF polarity (0: active low, 1: active high)
2649          * - [0]:       VSYNC polarity (mismatch here between
2650          *              datasheet and hardware, 0 is active high
2651          *              and 1 is active low...)
2652          */
2653         if (!bt656) {
2654                 if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
2655                         polarities |= BIT(1);
2656                 if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
2657                         polarities |= BIT(0);
2658         }
2659         if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
2660                 polarities |= BIT(5);
2661
2662         ret = ov5640_write_reg(sensor, OV5640_REG_POLARITY_CTRL00, polarities);
2663         if (ret)
2664                 return ret;
2665
2666         /*
2667          * powerdown MIPI TX/RX PHY & enable DVP
2668          *
2669          * MIPI CONTROL 00
2670          * [4] = 1      : Power down MIPI HS Tx
2671          * [3] = 1      : Power down MIPI LS Rx
2672          * [2] = 0      : DVP enable (MIPI disable)
2673          */
2674         ret = ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00, 0x18);
2675         if (ret)
2676                 return ret;
2677
2678         /*
2679          * enable VSYNC/HREF/PCLK DVP control lines
2680          * & D[9:6] DVP data lines
2681          *
2682          * PAD OUTPUT ENABLE 01
2683          * - 6:         VSYNC output enable
2684          * - 5:         HREF output enable
2685          * - 4:         PCLK output enable
2686          * - [3:0]:     D[9:6] output enable
2687          */
2688         ret = ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT_ENABLE01,
2689                                bt656 ? 0x1f : 0x7f);
2690         if (ret)
2691                 return ret;
2692
2693         /*
2694          * enable D[5:0] DVP data lines
2695          *
2696          * PAD OUTPUT ENABLE 02
2697          * - [7:2]:     D[5:0] output enable
2698          */
2699         return ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT_ENABLE02, 0xfc);
2700 }
2701
2702 static int ov5640_set_power(struct ov5640_dev *sensor, bool on)
2703 {
2704         int ret = 0;
2705
2706         if (on) {
2707                 ret = ov5640_set_power_on(sensor);
2708                 if (ret)
2709                         return ret;
2710
2711                 ret = ov5640_restore_mode(sensor);
2712                 if (ret)
2713                         goto power_off;
2714         }
2715
2716         if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY)
2717                 ret = ov5640_set_power_mipi(sensor, on);
2718         else
2719                 ret = ov5640_set_power_dvp(sensor, on);
2720         if (ret)
2721                 goto power_off;
2722
2723         if (!on)
2724                 ov5640_set_power_off(sensor);
2725
2726         return 0;
2727
2728 power_off:
2729         ov5640_set_power_off(sensor);
2730         return ret;
2731 }
2732
2733 static int ov5640_sensor_suspend(struct device *dev)
2734 {
2735         struct v4l2_subdev *sd = dev_get_drvdata(dev);
2736         struct ov5640_dev *ov5640 = to_ov5640_dev(sd);
2737
2738         return ov5640_set_power(ov5640, false);
2739 }
2740
2741 static int ov5640_sensor_resume(struct device *dev)
2742 {
2743         struct v4l2_subdev *sd = dev_get_drvdata(dev);
2744         struct ov5640_dev *ov5640 = to_ov5640_dev(sd);
2745
2746         return ov5640_set_power(ov5640, true);
2747 }
2748
2749 /* --------------- Subdev Operations --------------- */
2750
2751 static int ov5640_try_frame_interval(struct ov5640_dev *sensor,
2752                                      struct v4l2_fract *fi,
2753                                      const struct ov5640_mode_info *mode_info)
2754 {
2755         const struct ov5640_mode_info *mode = mode_info;
2756         enum ov5640_frame_rate rate = OV5640_15_FPS;
2757         int minfps, maxfps, best_fps, fps;
2758         int i;
2759
2760         minfps = ov5640_framerates[OV5640_15_FPS];
2761         maxfps = ov5640_framerates[mode->max_fps];
2762
2763         if (fi->numerator == 0) {
2764                 fi->denominator = maxfps;
2765                 fi->numerator = 1;
2766                 rate = mode->max_fps;
2767                 goto find_mode;
2768         }
2769
2770         fps = clamp_val(DIV_ROUND_CLOSEST(fi->denominator, fi->numerator),
2771                         minfps, maxfps);
2772
2773         best_fps = minfps;
2774         for (i = 0; i < ARRAY_SIZE(ov5640_framerates); i++) {
2775                 int curr_fps = ov5640_framerates[i];
2776
2777                 if (abs(curr_fps - fps) < abs(best_fps - fps)) {
2778                         best_fps = curr_fps;
2779                         rate = i;
2780                 }
2781         }
2782
2783         fi->numerator = 1;
2784         fi->denominator = best_fps;
2785
2786 find_mode:
2787         mode = ov5640_find_mode(sensor, mode->width, mode->height, false);
2788         return mode ? rate : -EINVAL;
2789 }
2790
2791 static int ov5640_get_fmt(struct v4l2_subdev *sd,
2792                           struct v4l2_subdev_state *sd_state,
2793                           struct v4l2_subdev_format *format)
2794 {
2795         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2796         struct v4l2_mbus_framefmt *fmt;
2797
2798         if (format->pad != 0)
2799                 return -EINVAL;
2800
2801         mutex_lock(&sensor->lock);
2802
2803         if (format->which == V4L2_SUBDEV_FORMAT_TRY)
2804                 fmt = v4l2_subdev_get_try_format(&sensor->sd, sd_state,
2805                                                  format->pad);
2806         else
2807                 fmt = &sensor->fmt;
2808
2809         format->format = *fmt;
2810
2811         mutex_unlock(&sensor->lock);
2812
2813         return 0;
2814 }
2815
2816 static int ov5640_try_fmt_internal(struct v4l2_subdev *sd,
2817                                    struct v4l2_mbus_framefmt *fmt,
2818                                    enum ov5640_frame_rate fr,
2819                                    const struct ov5640_mode_info **new_mode)
2820 {
2821         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2822         const struct ov5640_mode_info *mode;
2823         const struct ov5640_pixfmt *pixfmt;
2824         unsigned int bpp;
2825
2826         mode = ov5640_find_mode(sensor, fmt->width, fmt->height, true);
2827         if (!mode)
2828                 return -EINVAL;
2829
2830         pixfmt = ov5640_code_to_pixfmt(sensor, fmt->code);
2831         bpp = pixfmt->bpp;
2832
2833         /*
2834          * Adjust mode according to bpp:
2835          * - 8bpp modes work for resolution >= 1280x720
2836          * - 24bpp modes work resolution < 1280x720
2837          */
2838         if (bpp == 8 && mode->width < 1280)
2839                 mode = &ov5640_mode_data[OV5640_MODE_720P_1280_720];
2840         else if (bpp == 24 && mode->width > 1024)
2841                 mode = &ov5640_mode_data[OV5640_MODE_XGA_1024_768];
2842
2843         fmt->width = mode->width;
2844         fmt->height = mode->height;
2845
2846         if (new_mode)
2847                 *new_mode = mode;
2848
2849         fmt->code = pixfmt->code;
2850         fmt->colorspace = pixfmt->colorspace;
2851         fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
2852         fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
2853         fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
2854
2855         return 0;
2856 }
2857
2858 static int ov5640_update_pixel_rate(struct ov5640_dev *sensor)
2859 {
2860         const struct ov5640_mode_info *mode = sensor->current_mode;
2861         enum ov5640_pixel_rate_id pixel_rate_id = mode->pixel_rate;
2862         struct v4l2_mbus_framefmt *fmt = &sensor->fmt;
2863         const struct ov5640_timings *timings;
2864         s32 exposure_val, exposure_max;
2865         unsigned int hblank;
2866         unsigned int i = 0;
2867         u32 pixel_rate;
2868         s64 link_freq;
2869         u32 num_lanes;
2870         u32 vblank;
2871         u32 bpp;
2872
2873         /*
2874          * Update the pixel rate control value.
2875          *
2876          * For DVP mode, maintain the pixel rate calculation using fixed FPS.
2877          */
2878         if (!ov5640_is_csi2(sensor)) {
2879                 __v4l2_ctrl_s_ctrl_int64(sensor->ctrls.pixel_rate,
2880                                          ov5640_calc_pixel_rate(sensor));
2881
2882                 return 0;
2883         }
2884
2885         /*
2886          * The MIPI CSI-2 link frequency should comply with the CSI-2
2887          * specification and be lower than 1GHz.
2888          *
2889          * Start from the suggested pixel_rate for the current mode and
2890          * progressively slow it down if it exceeds 1GHz.
2891          */
2892         num_lanes = sensor->ep.bus.mipi_csi2.num_data_lanes;
2893         bpp = ov5640_code_to_bpp(sensor, fmt->code);
2894         do {
2895                 pixel_rate = ov5640_pixel_rates[pixel_rate_id];
2896                 link_freq = pixel_rate * bpp / (2 * num_lanes);
2897         } while (link_freq >= 1000000000U &&
2898                  ++pixel_rate_id < OV5640_NUM_PIXEL_RATES);
2899
2900         sensor->current_link_freq = link_freq;
2901
2902         /*
2903          * Higher link rates require the clock tree to be programmed with
2904          * 'mipi_div' = 1; this has the effect of halving the actual output
2905          * pixel rate in the MIPI domain.
2906          *
2907          * Adjust the pixel rate and link frequency control value to report it
2908          * correctly to userspace.
2909          */
2910         if (link_freq > OV5640_LINK_RATE_MAX) {
2911                 pixel_rate /= 2;
2912                 link_freq /= 2;
2913         }
2914
2915         for (i = 0; i < ARRAY_SIZE(ov5640_csi2_link_freqs); ++i) {
2916                 if (ov5640_csi2_link_freqs[i] == link_freq)
2917                         break;
2918         }
2919         WARN_ON(i == ARRAY_SIZE(ov5640_csi2_link_freqs));
2920
2921         __v4l2_ctrl_s_ctrl_int64(sensor->ctrls.pixel_rate, pixel_rate);
2922         __v4l2_ctrl_s_ctrl(sensor->ctrls.link_freq, i);
2923
2924         timings = ov5640_timings(sensor, mode);
2925         hblank = timings->htot - mode->width;
2926         __v4l2_ctrl_modify_range(sensor->ctrls.hblank,
2927                                  hblank, hblank, 1, hblank);
2928
2929         vblank = timings->vblank_def;
2930
2931         if (sensor->current_fr != mode->def_fps) {
2932                 /*
2933                  * Compute the vertical blanking according to the framerate
2934                  * configured with s_frame_interval.
2935                  */
2936                 int fie_num = sensor->frame_interval.numerator;
2937                 int fie_denom = sensor->frame_interval.denominator;
2938
2939                 vblank = ((fie_num * pixel_rate / fie_denom) / timings->htot) -
2940                         mode->height;
2941         }
2942
2943         __v4l2_ctrl_modify_range(sensor->ctrls.vblank, OV5640_MIN_VBLANK,
2944                                  OV5640_MAX_VTS - mode->height, 1, vblank);
2945         __v4l2_ctrl_s_ctrl(sensor->ctrls.vblank, vblank);
2946
2947         exposure_max = timings->crop.height + vblank - 4;
2948         exposure_val = clamp_t(s32, sensor->ctrls.exposure->val,
2949                                sensor->ctrls.exposure->minimum,
2950                                exposure_max);
2951
2952         __v4l2_ctrl_modify_range(sensor->ctrls.exposure,
2953                                  sensor->ctrls.exposure->minimum,
2954                                  exposure_max, 1, exposure_val);
2955
2956         return 0;
2957 }
2958
2959 static int ov5640_set_fmt(struct v4l2_subdev *sd,
2960                           struct v4l2_subdev_state *sd_state,
2961                           struct v4l2_subdev_format *format)
2962 {
2963         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2964         const struct ov5640_mode_info *new_mode;
2965         struct v4l2_mbus_framefmt *mbus_fmt = &format->format;
2966         int ret;
2967
2968         if (format->pad != 0)
2969                 return -EINVAL;
2970
2971         mutex_lock(&sensor->lock);
2972
2973         if (sensor->streaming) {
2974                 ret = -EBUSY;
2975                 goto out;
2976         }
2977
2978         ret = ov5640_try_fmt_internal(sd, mbus_fmt,
2979                                       sensor->current_fr, &new_mode);
2980         if (ret)
2981                 goto out;
2982
2983         if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
2984                 *v4l2_subdev_get_try_format(sd, sd_state, 0) = *mbus_fmt;
2985                 goto out;
2986         }
2987
2988         if (new_mode != sensor->current_mode) {
2989                 sensor->current_fr = new_mode->def_fps;
2990                 sensor->current_mode = new_mode;
2991                 sensor->pending_mode_change = true;
2992         }
2993         if (mbus_fmt->code != sensor->fmt.code)
2994                 sensor->pending_fmt_change = true;
2995
2996         /* update format even if code is unchanged, resolution might change */
2997         sensor->fmt = *mbus_fmt;
2998
2999         ov5640_update_pixel_rate(sensor);
3000
3001 out:
3002         mutex_unlock(&sensor->lock);
3003         return ret;
3004 }
3005
3006 static int ov5640_get_selection(struct v4l2_subdev *sd,
3007                                 struct v4l2_subdev_state *sd_state,
3008                                 struct v4l2_subdev_selection *sel)
3009 {
3010         struct ov5640_dev *sensor = to_ov5640_dev(sd);
3011         const struct ov5640_mode_info *mode = sensor->current_mode;
3012         const struct ov5640_timings *timings;
3013
3014         switch (sel->target) {
3015         case V4L2_SEL_TGT_CROP: {
3016                 mutex_lock(&sensor->lock);
3017                 timings = ov5640_timings(sensor, mode);
3018                 sel->r = timings->analog_crop;
3019                 mutex_unlock(&sensor->lock);
3020
3021                 return 0;
3022         }
3023
3024         case V4L2_SEL_TGT_NATIVE_SIZE:
3025         case V4L2_SEL_TGT_CROP_BOUNDS:
3026                 sel->r.top = 0;
3027                 sel->r.left = 0;
3028                 sel->r.width = OV5640_NATIVE_WIDTH;
3029                 sel->r.height = OV5640_NATIVE_HEIGHT;
3030
3031                 return 0;
3032
3033         case V4L2_SEL_TGT_CROP_DEFAULT:
3034                 sel->r.top = OV5640_PIXEL_ARRAY_TOP;
3035                 sel->r.left = OV5640_PIXEL_ARRAY_LEFT;
3036                 sel->r.width = OV5640_PIXEL_ARRAY_WIDTH;
3037                 sel->r.height = OV5640_PIXEL_ARRAY_HEIGHT;
3038
3039                 return 0;
3040         }
3041
3042         return -EINVAL;
3043 }
3044
3045 static int ov5640_set_framefmt(struct ov5640_dev *sensor,
3046                                struct v4l2_mbus_framefmt *format)
3047 {
3048         bool is_jpeg = format->code == MEDIA_BUS_FMT_JPEG_1X8;
3049         const struct ov5640_pixfmt *pixfmt;
3050         int ret = 0;
3051
3052         pixfmt = ov5640_code_to_pixfmt(sensor, format->code);
3053
3054         /* FORMAT CONTROL00: YUV and RGB formatting */
3055         ret = ov5640_write_reg(sensor, OV5640_REG_FORMAT_CONTROL00,
3056                                pixfmt->ctrl00);
3057         if (ret)
3058                 return ret;
3059
3060         /* FORMAT MUX CONTROL: ISP YUV or RGB */
3061         ret = ov5640_write_reg(sensor, OV5640_REG_ISP_FORMAT_MUX_CTRL,
3062                                pixfmt->mux);
3063         if (ret)
3064                 return ret;
3065
3066         /*
3067          * TIMING TC REG21:
3068          * - [5]:       JPEG enable
3069          */
3070         ret = ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG21,
3071                              BIT(5), is_jpeg ? BIT(5) : 0);
3072         if (ret)
3073                 return ret;
3074
3075         /*
3076          * SYSTEM RESET02:
3077          * - [4]:       Reset JFIFO
3078          * - [3]:       Reset SFIFO
3079          * - [2]:       Reset JPEG
3080          */
3081         ret = ov5640_mod_reg(sensor, OV5640_REG_SYS_RESET02,
3082                              BIT(4) | BIT(3) | BIT(2),
3083                              is_jpeg ? 0 : (BIT(4) | BIT(3) | BIT(2)));
3084         if (ret)
3085                 return ret;
3086
3087         /*
3088          * CLOCK ENABLE02:
3089          * - [5]:       Enable JPEG 2x clock
3090          * - [3]:       Enable JPEG clock
3091          */
3092         return ov5640_mod_reg(sensor, OV5640_REG_SYS_CLOCK_ENABLE02,
3093                               BIT(5) | BIT(3),
3094                               is_jpeg ? (BIT(5) | BIT(3)) : 0);
3095 }
3096
3097 /*
3098  * Sensor Controls.
3099  */
3100
3101 static int ov5640_set_ctrl_hue(struct ov5640_dev *sensor, int value)
3102 {
3103         int ret;
3104
3105         if (value) {
3106                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0,
3107                                      BIT(0), BIT(0));
3108                 if (ret)
3109                         return ret;
3110                 ret = ov5640_write_reg16(sensor, OV5640_REG_SDE_CTRL1, value);
3111         } else {
3112                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0, BIT(0), 0);
3113         }
3114
3115         return ret;
3116 }
3117
3118 static int ov5640_set_ctrl_contrast(struct ov5640_dev *sensor, int value)
3119 {
3120         int ret;
3121
3122         if (value) {
3123                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0,
3124                                      BIT(2), BIT(2));
3125                 if (ret)
3126                         return ret;
3127                 ret = ov5640_write_reg(sensor, OV5640_REG_SDE_CTRL5,
3128                                        value & 0xff);
3129         } else {
3130                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0, BIT(2), 0);
3131         }
3132
3133         return ret;
3134 }
3135
3136 static int ov5640_set_ctrl_saturation(struct ov5640_dev *sensor, int value)
3137 {
3138         int ret;
3139
3140         if (value) {
3141                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0,
3142                                      BIT(1), BIT(1));
3143                 if (ret)
3144                         return ret;
3145                 ret = ov5640_write_reg(sensor, OV5640_REG_SDE_CTRL3,
3146                                        value & 0xff);
3147                 if (ret)
3148                         return ret;
3149                 ret = ov5640_write_reg(sensor, OV5640_REG_SDE_CTRL4,
3150                                        value & 0xff);
3151         } else {
3152                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0, BIT(1), 0);
3153         }
3154
3155         return ret;
3156 }
3157
3158 static int ov5640_set_ctrl_white_balance(struct ov5640_dev *sensor, int awb)
3159 {
3160         int ret;
3161
3162         ret = ov5640_mod_reg(sensor, OV5640_REG_AWB_MANUAL_CTRL,
3163                              BIT(0), awb ? 0 : 1);
3164         if (ret)
3165                 return ret;
3166
3167         if (!awb) {
3168                 u16 red = (u16)sensor->ctrls.red_balance->val;
3169                 u16 blue = (u16)sensor->ctrls.blue_balance->val;
3170
3171                 ret = ov5640_write_reg16(sensor, OV5640_REG_AWB_R_GAIN, red);
3172                 if (ret)
3173                         return ret;
3174                 ret = ov5640_write_reg16(sensor, OV5640_REG_AWB_B_GAIN, blue);
3175         }
3176
3177         return ret;
3178 }
3179
3180 static int ov5640_set_ctrl_exposure(struct ov5640_dev *sensor,
3181                                     enum v4l2_exposure_auto_type auto_exposure)
3182 {
3183         struct ov5640_ctrls *ctrls = &sensor->ctrls;
3184         bool auto_exp = (auto_exposure == V4L2_EXPOSURE_AUTO);
3185         int ret = 0;
3186
3187         if (ctrls->auto_exp->is_new) {
3188                 ret = ov5640_set_autoexposure(sensor, auto_exp);
3189                 if (ret)
3190                         return ret;
3191         }
3192
3193         if (!auto_exp && ctrls->exposure->is_new) {
3194                 u16 max_exp;
3195
3196                 ret = ov5640_read_reg16(sensor, OV5640_REG_AEC_PK_VTS,
3197                                         &max_exp);
3198                 if (ret)
3199                         return ret;
3200                 ret = ov5640_get_vts(sensor);
3201                 if (ret < 0)
3202                         return ret;
3203                 max_exp += ret;
3204                 ret = 0;
3205
3206                 if (ctrls->exposure->val < max_exp)
3207                         ret = ov5640_set_exposure(sensor, ctrls->exposure->val);
3208         }
3209
3210         return ret;
3211 }
3212
3213 static int ov5640_set_ctrl_gain(struct ov5640_dev *sensor, bool auto_gain)
3214 {
3215         struct ov5640_ctrls *ctrls = &sensor->ctrls;
3216         int ret = 0;
3217
3218         if (ctrls->auto_gain->is_new) {
3219                 ret = ov5640_set_autogain(sensor, auto_gain);
3220                 if (ret)
3221                         return ret;
3222         }
3223
3224         if (!auto_gain && ctrls->gain->is_new)
3225                 ret = ov5640_set_gain(sensor, ctrls->gain->val);
3226
3227         return ret;
3228 }
3229
3230 static const char * const test_pattern_menu[] = {
3231         "Disabled",
3232         "Color bars",
3233         "Color bars w/ rolling bar",
3234         "Color squares",
3235         "Color squares w/ rolling bar",
3236 };
3237
3238 #define OV5640_TEST_ENABLE              BIT(7)
3239 #define OV5640_TEST_ROLLING             BIT(6)  /* rolling horizontal bar */
3240 #define OV5640_TEST_TRANSPARENT         BIT(5)
3241 #define OV5640_TEST_SQUARE_BW           BIT(4)  /* black & white squares */
3242 #define OV5640_TEST_BAR_STANDARD        (0 << 2)
3243 #define OV5640_TEST_BAR_VERT_CHANGE_1   (1 << 2)
3244 #define OV5640_TEST_BAR_HOR_CHANGE      (2 << 2)
3245 #define OV5640_TEST_BAR_VERT_CHANGE_2   (3 << 2)
3246 #define OV5640_TEST_BAR                 (0 << 0)
3247 #define OV5640_TEST_RANDOM              (1 << 0)
3248 #define OV5640_TEST_SQUARE              (2 << 0)
3249 #define OV5640_TEST_BLACK               (3 << 0)
3250
3251 static const u8 test_pattern_val[] = {
3252         0,
3253         OV5640_TEST_ENABLE | OV5640_TEST_BAR_VERT_CHANGE_1 |
3254                 OV5640_TEST_BAR,
3255         OV5640_TEST_ENABLE | OV5640_TEST_ROLLING |
3256                 OV5640_TEST_BAR_VERT_CHANGE_1 | OV5640_TEST_BAR,
3257         OV5640_TEST_ENABLE | OV5640_TEST_SQUARE,
3258         OV5640_TEST_ENABLE | OV5640_TEST_ROLLING | OV5640_TEST_SQUARE,
3259 };
3260
3261 static int ov5640_set_ctrl_test_pattern(struct ov5640_dev *sensor, int value)
3262 {
3263         return ov5640_write_reg(sensor, OV5640_REG_PRE_ISP_TEST_SET1,
3264                                 test_pattern_val[value]);
3265 }
3266
3267 static int ov5640_set_ctrl_light_freq(struct ov5640_dev *sensor, int value)
3268 {
3269         int ret;
3270
3271         ret = ov5640_mod_reg(sensor, OV5640_REG_HZ5060_CTRL01, BIT(7),
3272                              (value == V4L2_CID_POWER_LINE_FREQUENCY_AUTO) ?
3273                              0 : BIT(7));
3274         if (ret)
3275                 return ret;
3276
3277         return ov5640_mod_reg(sensor, OV5640_REG_HZ5060_CTRL00, BIT(2),
3278                               (value == V4L2_CID_POWER_LINE_FREQUENCY_50HZ) ?
3279                               BIT(2) : 0);
3280 }
3281
3282 static int ov5640_set_ctrl_hflip(struct ov5640_dev *sensor, int value)
3283 {
3284         /*
3285          * If sensor is mounted upside down, mirror logic is inversed.
3286          *
3287          * Sensor is a BSI (Back Side Illuminated) one,
3288          * so image captured is physically mirrored.
3289          * This is why mirror logic is inversed in
3290          * order to cancel this mirror effect.
3291          */
3292
3293         /*
3294          * TIMING TC REG21:
3295          * - [2]:       ISP mirror
3296          * - [1]:       Sensor mirror
3297          */
3298         return ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG21,
3299                               BIT(2) | BIT(1),
3300                               (!(value ^ sensor->upside_down)) ?
3301                               (BIT(2) | BIT(1)) : 0);
3302 }
3303
3304 static int ov5640_set_ctrl_vflip(struct ov5640_dev *sensor, int value)
3305 {
3306         /* If sensor is mounted upside down, flip logic is inversed */
3307
3308         /*
3309          * TIMING TC REG20:
3310          * - [2]:       ISP vflip
3311          * - [1]:       Sensor vflip
3312          */
3313         return ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG20,
3314                               BIT(2) | BIT(1),
3315                               (value ^ sensor->upside_down) ?
3316                               (BIT(2) | BIT(1)) : 0);
3317 }
3318
3319 static int ov5640_set_ctrl_vblank(struct ov5640_dev *sensor, int value)
3320 {
3321         const struct ov5640_mode_info *mode = sensor->current_mode;
3322
3323         /* Update the VTOT timing register value. */
3324         return ov5640_write_reg16(sensor, OV5640_REG_TIMING_VTS,
3325                                   mode->height + value);
3326 }
3327
3328 static int ov5640_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
3329 {
3330         struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
3331         struct ov5640_dev *sensor = to_ov5640_dev(sd);
3332         int val;
3333
3334         /* v4l2_ctrl_lock() locks our own mutex */
3335
3336         if (!pm_runtime_get_if_in_use(&sensor->i2c_client->dev))
3337                 return 0;
3338
3339         switch (ctrl->id) {
3340         case V4L2_CID_AUTOGAIN:
3341                 val = ov5640_get_gain(sensor);
3342                 if (val < 0)
3343                         return val;
3344                 sensor->ctrls.gain->val = val;
3345                 break;
3346         case V4L2_CID_EXPOSURE_AUTO:
3347                 val = ov5640_get_exposure(sensor);
3348                 if (val < 0)
3349                         return val;
3350                 sensor->ctrls.exposure->val = val;
3351                 break;
3352         }
3353
3354         pm_runtime_mark_last_busy(&sensor->i2c_client->dev);
3355         pm_runtime_put_autosuspend(&sensor->i2c_client->dev);
3356
3357         return 0;
3358 }
3359
3360 static int ov5640_s_ctrl(struct v4l2_ctrl *ctrl)
3361 {
3362         struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
3363         struct ov5640_dev *sensor = to_ov5640_dev(sd);
3364         const struct ov5640_mode_info *mode = sensor->current_mode;
3365         const struct ov5640_timings *timings;
3366         unsigned int exp_max;
3367         int ret;
3368
3369         /* v4l2_ctrl_lock() locks our own mutex */
3370
3371         switch (ctrl->id) {
3372         case V4L2_CID_VBLANK:
3373                 /* Update the exposure range to the newly programmed vblank. */
3374                 timings = ov5640_timings(sensor, mode);
3375                 exp_max = mode->height + ctrl->val - 4;
3376                 __v4l2_ctrl_modify_range(sensor->ctrls.exposure,
3377                                          sensor->ctrls.exposure->minimum,
3378                                          exp_max, sensor->ctrls.exposure->step,
3379                                          timings->vblank_def);
3380                 break;
3381         }
3382
3383         /*
3384          * If the device is not powered up by the host driver do
3385          * not apply any controls to H/W at this time. Instead
3386          * the controls will be restored at start streaming time.
3387          */
3388         if (!pm_runtime_get_if_in_use(&sensor->i2c_client->dev))
3389                 return 0;
3390
3391         switch (ctrl->id) {
3392         case V4L2_CID_AUTOGAIN:
3393                 ret = ov5640_set_ctrl_gain(sensor, ctrl->val);
3394                 break;
3395         case V4L2_CID_EXPOSURE_AUTO:
3396                 ret = ov5640_set_ctrl_exposure(sensor, ctrl->val);
3397                 break;
3398         case V4L2_CID_AUTO_WHITE_BALANCE:
3399                 ret = ov5640_set_ctrl_white_balance(sensor, ctrl->val);
3400                 break;
3401         case V4L2_CID_HUE:
3402                 ret = ov5640_set_ctrl_hue(sensor, ctrl->val);
3403                 break;
3404         case V4L2_CID_CONTRAST:
3405                 ret = ov5640_set_ctrl_contrast(sensor, ctrl->val);
3406                 break;
3407         case V4L2_CID_SATURATION:
3408                 ret = ov5640_set_ctrl_saturation(sensor, ctrl->val);
3409                 break;
3410         case V4L2_CID_TEST_PATTERN:
3411                 ret = ov5640_set_ctrl_test_pattern(sensor, ctrl->val);
3412                 break;
3413         case V4L2_CID_POWER_LINE_FREQUENCY:
3414                 ret = ov5640_set_ctrl_light_freq(sensor, ctrl->val);
3415                 break;
3416         case V4L2_CID_HFLIP:
3417                 ret = ov5640_set_ctrl_hflip(sensor, ctrl->val);
3418                 break;
3419         case V4L2_CID_VFLIP:
3420                 ret = ov5640_set_ctrl_vflip(sensor, ctrl->val);
3421                 break;
3422         case V4L2_CID_VBLANK:
3423                 ret = ov5640_set_ctrl_vblank(sensor, ctrl->val);
3424                 break;
3425         default:
3426                 ret = -EINVAL;
3427                 break;
3428         }
3429
3430         pm_runtime_mark_last_busy(&sensor->i2c_client->dev);
3431         pm_runtime_put_autosuspend(&sensor->i2c_client->dev);
3432
3433         return ret;
3434 }
3435
3436 static const struct v4l2_ctrl_ops ov5640_ctrl_ops = {
3437         .g_volatile_ctrl = ov5640_g_volatile_ctrl,
3438         .s_ctrl = ov5640_s_ctrl,
3439 };
3440
3441 static int ov5640_init_controls(struct ov5640_dev *sensor)
3442 {
3443         const struct ov5640_mode_info *mode = sensor->current_mode;
3444         const struct v4l2_ctrl_ops *ops = &ov5640_ctrl_ops;
3445         struct ov5640_ctrls *ctrls = &sensor->ctrls;
3446         struct v4l2_ctrl_handler *hdl = &ctrls->handler;
3447         struct v4l2_fwnode_device_properties props;
3448         const struct ov5640_timings *timings;
3449         unsigned int max_vblank;
3450         unsigned int hblank;
3451         int ret;
3452
3453         v4l2_ctrl_handler_init(hdl, 32);
3454
3455         /* we can use our own mutex for the ctrl lock */
3456         hdl->lock = &sensor->lock;
3457
3458         /* Clock related controls */
3459         ctrls->pixel_rate = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_PIXEL_RATE,
3460                               ov5640_pixel_rates[OV5640_NUM_PIXEL_RATES - 1],
3461                               ov5640_pixel_rates[0], 1,
3462                               ov5640_pixel_rates[mode->pixel_rate]);
3463
3464         ctrls->link_freq = v4l2_ctrl_new_int_menu(hdl, ops,
3465                                         V4L2_CID_LINK_FREQ,
3466                                         ARRAY_SIZE(ov5640_csi2_link_freqs) - 1,
3467                                         OV5640_DEFAULT_LINK_FREQ,
3468                                         ov5640_csi2_link_freqs);
3469
3470         timings = ov5640_timings(sensor, mode);
3471         hblank = timings->htot - mode->width;
3472         ctrls->hblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HBLANK, hblank,
3473                                           hblank, 1, hblank);
3474
3475         max_vblank = OV5640_MAX_VTS - mode->height;
3476         ctrls->vblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VBLANK,
3477                                           OV5640_MIN_VBLANK, max_vblank,
3478                                           1, timings->vblank_def);
3479
3480         /* Auto/manual white balance */
3481         ctrls->auto_wb = v4l2_ctrl_new_std(hdl, ops,
3482                                            V4L2_CID_AUTO_WHITE_BALANCE,
3483                                            0, 1, 1, 1);
3484         ctrls->blue_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BLUE_BALANCE,
3485                                                 0, 4095, 1, 0);
3486         ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE,
3487                                                0, 4095, 1, 0);
3488         /* Auto/manual exposure */
3489         ctrls->auto_exp = v4l2_ctrl_new_std_menu(hdl, ops,
3490                                                  V4L2_CID_EXPOSURE_AUTO,
3491                                                  V4L2_EXPOSURE_MANUAL, 0,
3492                                                  V4L2_EXPOSURE_AUTO);
3493         ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
3494                                             0, 65535, 1, 0);
3495         /* Auto/manual gain */
3496         ctrls->auto_gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTOGAIN,
3497                                              0, 1, 1, 1);
3498         ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_ANALOGUE_GAIN,
3499                                         0, 1023, 1, 0);
3500
3501         ctrls->saturation = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SATURATION,
3502                                               0, 255, 1, 64);
3503         ctrls->hue = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HUE,
3504                                        0, 359, 1, 0);
3505         ctrls->contrast = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST,
3506                                             0, 255, 1, 0);
3507         ctrls->test_pattern =
3508                 v4l2_ctrl_new_std_menu_items(hdl, ops, V4L2_CID_TEST_PATTERN,
3509                                              ARRAY_SIZE(test_pattern_menu) - 1,
3510                                              0, 0, test_pattern_menu);
3511         ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP,
3512                                          0, 1, 1, 0);
3513         ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP,
3514                                          0, 1, 1, 0);
3515
3516         ctrls->light_freq =
3517                 v4l2_ctrl_new_std_menu(hdl, ops,
3518                                        V4L2_CID_POWER_LINE_FREQUENCY,
3519                                        V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0,
3520                                        V4L2_CID_POWER_LINE_FREQUENCY_50HZ);
3521
3522         if (hdl->error) {
3523                 ret = hdl->error;
3524                 goto free_ctrls;
3525         }
3526
3527         ret = v4l2_fwnode_device_parse(&sensor->i2c_client->dev, &props);
3528         if (ret)
3529                 goto free_ctrls;
3530
3531         if (props.rotation == 180)
3532                 sensor->upside_down = true;
3533
3534         ret = v4l2_ctrl_new_fwnode_properties(hdl, ops, &props);
3535         if (ret)
3536                 goto free_ctrls;
3537
3538         ctrls->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;
3539         ctrls->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
3540         ctrls->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
3541         ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE;
3542         ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE;
3543
3544         v4l2_ctrl_auto_cluster(3, &ctrls->auto_wb, 0, false);
3545         v4l2_ctrl_auto_cluster(2, &ctrls->auto_gain, 0, true);
3546         v4l2_ctrl_auto_cluster(2, &ctrls->auto_exp, 1, true);
3547
3548         sensor->sd.ctrl_handler = hdl;
3549         return 0;
3550
3551 free_ctrls:
3552         v4l2_ctrl_handler_free(hdl);
3553         return ret;
3554 }
3555
3556 static int ov5640_enum_frame_size(struct v4l2_subdev *sd,
3557                                   struct v4l2_subdev_state *sd_state,
3558                                   struct v4l2_subdev_frame_size_enum *fse)
3559 {
3560         struct ov5640_dev *sensor = to_ov5640_dev(sd);
3561         u32 bpp = ov5640_code_to_bpp(sensor, fse->code);
3562         unsigned int index = fse->index;
3563
3564         if (fse->pad != 0)
3565                 return -EINVAL;
3566         if (!bpp)
3567                 return -EINVAL;
3568
3569         /* Only low-resolution modes are supported for 24bpp formats. */
3570         if (bpp == 24 && index >= OV5640_MODE_720P_1280_720)
3571                 return -EINVAL;
3572
3573         /* FIXME: Low resolution modes don't work in 8bpp formats. */
3574         if (bpp == 8)
3575                 index += OV5640_MODE_720P_1280_720;
3576
3577         if (index >= OV5640_NUM_MODES)
3578                 return -EINVAL;
3579
3580         fse->min_width = ov5640_mode_data[index].width;
3581         fse->max_width = fse->min_width;
3582         fse->min_height = ov5640_mode_data[index].height;
3583         fse->max_height = fse->min_height;
3584
3585         return 0;
3586 }
3587
3588 static int ov5640_enum_frame_interval(
3589         struct v4l2_subdev *sd,
3590         struct v4l2_subdev_state *sd_state,
3591         struct v4l2_subdev_frame_interval_enum *fie)
3592 {
3593         struct ov5640_dev *sensor = to_ov5640_dev(sd);
3594         const struct ov5640_mode_info *mode;
3595         struct v4l2_fract tpf;
3596         int ret;
3597
3598         if (fie->pad != 0)
3599                 return -EINVAL;
3600         if (fie->index >= OV5640_NUM_FRAMERATES)
3601                 return -EINVAL;
3602
3603         mode = ov5640_find_mode(sensor, fie->width, fie->height, false);
3604         if (!mode)
3605                 return -EINVAL;
3606
3607         tpf.numerator = 1;
3608         tpf.denominator = ov5640_framerates[fie->index];
3609
3610         ret = ov5640_try_frame_interval(sensor, &tpf, mode);
3611         if (ret < 0)
3612                 return -EINVAL;
3613
3614         fie->interval = tpf;
3615         return 0;
3616 }
3617
3618 static int ov5640_g_frame_interval(struct v4l2_subdev *sd,
3619                                    struct v4l2_subdev_frame_interval *fi)
3620 {
3621         struct ov5640_dev *sensor = to_ov5640_dev(sd);
3622
3623         mutex_lock(&sensor->lock);
3624         fi->interval = sensor->frame_interval;
3625         mutex_unlock(&sensor->lock);
3626
3627         return 0;
3628 }
3629
3630 static int ov5640_s_frame_interval(struct v4l2_subdev *sd,
3631                                    struct v4l2_subdev_frame_interval *fi)
3632 {
3633         struct ov5640_dev *sensor = to_ov5640_dev(sd);
3634         const struct ov5640_mode_info *mode;
3635         int frame_rate, ret = 0;
3636
3637         if (fi->pad != 0)
3638                 return -EINVAL;
3639
3640         mutex_lock(&sensor->lock);
3641
3642         if (sensor->streaming) {
3643                 ret = -EBUSY;
3644                 goto out;
3645         }
3646
3647         mode = sensor->current_mode;
3648
3649         frame_rate = ov5640_try_frame_interval(sensor, &fi->interval, mode);
3650         if (frame_rate < 0) {
3651                 /* Always return a valid frame interval value */
3652                 fi->interval = sensor->frame_interval;
3653                 goto out;
3654         }
3655
3656         mode = ov5640_find_mode(sensor, mode->width, mode->height, true);
3657         if (!mode) {
3658                 ret = -EINVAL;
3659                 goto out;
3660         }
3661
3662         if (ov5640_framerates[frame_rate] > ov5640_framerates[mode->max_fps]) {
3663                 ret = -EINVAL;
3664                 goto out;
3665         }
3666
3667         if (mode != sensor->current_mode ||
3668             frame_rate != sensor->current_fr) {
3669                 sensor->current_fr = frame_rate;
3670                 sensor->frame_interval = fi->interval;
3671                 sensor->current_mode = mode;
3672                 sensor->pending_mode_change = true;
3673
3674                 ov5640_update_pixel_rate(sensor);
3675         }
3676 out:
3677         mutex_unlock(&sensor->lock);
3678         return ret;
3679 }
3680
3681 static int ov5640_enum_mbus_code(struct v4l2_subdev *sd,
3682                                  struct v4l2_subdev_state *sd_state,
3683                                  struct v4l2_subdev_mbus_code_enum *code)
3684 {
3685         struct ov5640_dev *sensor = to_ov5640_dev(sd);
3686         const struct ov5640_pixfmt *formats;
3687         unsigned int num_formats;
3688
3689         if (ov5640_is_csi2(sensor)) {
3690                 formats = ov5640_csi2_formats;
3691                 num_formats = ARRAY_SIZE(ov5640_csi2_formats) - 1;
3692         } else {
3693                 formats = ov5640_dvp_formats;
3694                 num_formats = ARRAY_SIZE(ov5640_dvp_formats) - 1;
3695         }
3696
3697         if (code->index >= num_formats)
3698                 return -EINVAL;
3699
3700         code->code = formats[code->index].code;
3701
3702         return 0;
3703 }
3704
3705 static int ov5640_s_stream(struct v4l2_subdev *sd, int enable)
3706 {
3707         struct ov5640_dev *sensor = to_ov5640_dev(sd);
3708         int ret = 0;
3709
3710         if (enable) {
3711                 ret = pm_runtime_resume_and_get(&sensor->i2c_client->dev);
3712                 if (ret < 0)
3713                         return ret;
3714
3715                 ret = v4l2_ctrl_handler_setup(&sensor->ctrls.handler);
3716                 if (ret) {
3717                         pm_runtime_put(&sensor->i2c_client->dev);
3718                         return ret;
3719                 }
3720         }
3721
3722         mutex_lock(&sensor->lock);
3723
3724         if (sensor->streaming == !enable) {
3725                 if (enable && sensor->pending_mode_change) {
3726                         ret = ov5640_set_mode(sensor);
3727                         if (ret)
3728                                 goto out;
3729                 }
3730
3731                 if (enable && sensor->pending_fmt_change) {
3732                         ret = ov5640_set_framefmt(sensor, &sensor->fmt);
3733                         if (ret)
3734                                 goto out;
3735                         sensor->pending_fmt_change = false;
3736                 }
3737
3738                 if (ov5640_is_csi2(sensor))
3739                         ret = ov5640_set_stream_mipi(sensor, enable);
3740                 else
3741                         ret = ov5640_set_stream_dvp(sensor, enable);
3742
3743                 if (!ret)
3744                         sensor->streaming = enable;
3745         }
3746
3747 out:
3748         mutex_unlock(&sensor->lock);
3749
3750         if (!enable || ret) {
3751                 pm_runtime_mark_last_busy(&sensor->i2c_client->dev);
3752                 pm_runtime_put_autosuspend(&sensor->i2c_client->dev);
3753         }
3754
3755         return ret;
3756 }
3757
3758 static int ov5640_init_cfg(struct v4l2_subdev *sd,
3759                            struct v4l2_subdev_state *state)
3760 {
3761         struct ov5640_dev *sensor = to_ov5640_dev(sd);
3762         struct v4l2_mbus_framefmt *fmt =
3763                                 v4l2_subdev_get_try_format(sd, state, 0);
3764         struct v4l2_rect *crop = v4l2_subdev_get_try_crop(sd, state, 0);
3765
3766         *fmt = ov5640_is_csi2(sensor) ? ov5640_csi2_default_fmt :
3767                                         ov5640_dvp_default_fmt;
3768
3769         crop->left = OV5640_PIXEL_ARRAY_LEFT;
3770         crop->top = OV5640_PIXEL_ARRAY_TOP;
3771         crop->width = OV5640_PIXEL_ARRAY_WIDTH;
3772         crop->height = OV5640_PIXEL_ARRAY_HEIGHT;
3773
3774         return 0;
3775 }
3776
3777 static const struct v4l2_subdev_core_ops ov5640_core_ops = {
3778         .log_status = v4l2_ctrl_subdev_log_status,
3779         .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
3780         .unsubscribe_event = v4l2_event_subdev_unsubscribe,
3781 };
3782
3783 static const struct v4l2_subdev_video_ops ov5640_video_ops = {
3784         .g_frame_interval = ov5640_g_frame_interval,
3785         .s_frame_interval = ov5640_s_frame_interval,
3786         .s_stream = ov5640_s_stream,
3787 };
3788
3789 static const struct v4l2_subdev_pad_ops ov5640_pad_ops = {
3790         .init_cfg = ov5640_init_cfg,
3791         .enum_mbus_code = ov5640_enum_mbus_code,
3792         .get_fmt = ov5640_get_fmt,
3793         .set_fmt = ov5640_set_fmt,
3794         .get_selection = ov5640_get_selection,
3795         .enum_frame_size = ov5640_enum_frame_size,
3796         .enum_frame_interval = ov5640_enum_frame_interval,
3797 };
3798
3799 static const struct v4l2_subdev_ops ov5640_subdev_ops = {
3800         .core = &ov5640_core_ops,
3801         .video = &ov5640_video_ops,
3802         .pad = &ov5640_pad_ops,
3803 };
3804
3805 static int ov5640_get_regulators(struct ov5640_dev *sensor)
3806 {
3807         int i;
3808
3809         for (i = 0; i < OV5640_NUM_SUPPLIES; i++)
3810                 sensor->supplies[i].supply = ov5640_supply_name[i];
3811
3812         return devm_regulator_bulk_get(&sensor->i2c_client->dev,
3813                                        OV5640_NUM_SUPPLIES,
3814                                        sensor->supplies);
3815 }
3816
3817 static int ov5640_check_chip_id(struct ov5640_dev *sensor)
3818 {
3819         struct i2c_client *client = sensor->i2c_client;
3820         int ret = 0;
3821         u16 chip_id;
3822
3823         ret = ov5640_read_reg16(sensor, OV5640_REG_CHIP_ID, &chip_id);
3824         if (ret) {
3825                 dev_err(&client->dev, "%s: failed to read chip identifier\n",
3826                         __func__);
3827                 return ret;
3828         }
3829
3830         if (chip_id != 0x5640) {
3831                 dev_err(&client->dev, "%s: wrong chip identifier, expected 0x5640, got 0x%x\n",
3832                         __func__, chip_id);
3833                 return -ENXIO;
3834         }
3835
3836         return 0;
3837 }
3838
3839 static int ov5640_probe(struct i2c_client *client)
3840 {
3841         struct device *dev = &client->dev;
3842         struct fwnode_handle *endpoint;
3843         struct ov5640_dev *sensor;
3844         int ret;
3845
3846         sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
3847         if (!sensor)
3848                 return -ENOMEM;
3849
3850         sensor->i2c_client = client;
3851
3852         /*
3853          * default init sequence initialize sensor to
3854          * YUV422 UYVY VGA@30fps
3855          */
3856         sensor->frame_interval.numerator = 1;
3857         sensor->frame_interval.denominator = ov5640_framerates[OV5640_30_FPS];
3858         sensor->current_fr = OV5640_30_FPS;
3859         sensor->current_mode =
3860                 &ov5640_mode_data[OV5640_MODE_VGA_640_480];
3861         sensor->last_mode = sensor->current_mode;
3862         sensor->current_link_freq =
3863                 ov5640_csi2_link_freqs[OV5640_DEFAULT_LINK_FREQ];
3864
3865         sensor->ae_target = 52;
3866
3867         endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(&client->dev),
3868                                                   NULL);
3869         if (!endpoint) {
3870                 dev_err(dev, "endpoint node not found\n");
3871                 return -EINVAL;
3872         }
3873
3874         ret = v4l2_fwnode_endpoint_parse(endpoint, &sensor->ep);
3875         fwnode_handle_put(endpoint);
3876         if (ret) {
3877                 dev_err(dev, "Could not parse endpoint\n");
3878                 return ret;
3879         }
3880
3881         if (sensor->ep.bus_type != V4L2_MBUS_PARALLEL &&
3882             sensor->ep.bus_type != V4L2_MBUS_CSI2_DPHY &&
3883             sensor->ep.bus_type != V4L2_MBUS_BT656) {
3884                 dev_err(dev, "Unsupported bus type %d\n", sensor->ep.bus_type);
3885                 return -EINVAL;
3886         }
3887
3888         sensor->fmt = ov5640_is_csi2(sensor) ? ov5640_csi2_default_fmt :
3889                                                ov5640_dvp_default_fmt;
3890
3891         /* get system clock (xclk) */
3892         sensor->xclk = devm_clk_get(dev, "xclk");
3893         if (IS_ERR(sensor->xclk)) {
3894                 dev_err(dev, "failed to get xclk\n");
3895                 return PTR_ERR(sensor->xclk);
3896         }
3897
3898         sensor->xclk_freq = clk_get_rate(sensor->xclk);
3899         if (sensor->xclk_freq < OV5640_XCLK_MIN ||
3900             sensor->xclk_freq > OV5640_XCLK_MAX) {
3901                 dev_err(dev, "xclk frequency out of range: %d Hz\n",
3902                         sensor->xclk_freq);
3903                 return -EINVAL;
3904         }
3905
3906         /* request optional power down pin */
3907         sensor->pwdn_gpio = devm_gpiod_get_optional(dev, "powerdown",
3908                                                     GPIOD_OUT_HIGH);
3909         if (IS_ERR(sensor->pwdn_gpio))
3910                 return PTR_ERR(sensor->pwdn_gpio);
3911
3912         /* request optional reset pin */
3913         sensor->reset_gpio = devm_gpiod_get_optional(dev, "reset",
3914                                                      GPIOD_OUT_HIGH);
3915         if (IS_ERR(sensor->reset_gpio))
3916                 return PTR_ERR(sensor->reset_gpio);
3917
3918         v4l2_i2c_subdev_init(&sensor->sd, client, &ov5640_subdev_ops);
3919
3920         sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
3921                             V4L2_SUBDEV_FL_HAS_EVENTS;
3922         sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
3923         sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
3924         ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
3925         if (ret)
3926                 return ret;
3927
3928         ret = ov5640_get_regulators(sensor);
3929         if (ret)
3930                 goto entity_cleanup;
3931
3932         mutex_init(&sensor->lock);
3933
3934         ret = ov5640_init_controls(sensor);
3935         if (ret)
3936                 goto entity_cleanup;
3937
3938         ret = ov5640_sensor_resume(dev);
3939         if (ret) {
3940                 dev_err(dev, "failed to power on\n");
3941                 goto entity_cleanup;
3942         }
3943
3944         pm_runtime_set_active(dev);
3945         pm_runtime_get_noresume(dev);
3946         pm_runtime_enable(dev);
3947
3948         ret = ov5640_check_chip_id(sensor);
3949         if (ret)
3950                 goto err_pm_runtime;
3951
3952         ret = v4l2_async_register_subdev_sensor(&sensor->sd);
3953         if (ret)
3954                 goto err_pm_runtime;
3955
3956         pm_runtime_set_autosuspend_delay(dev, 1000);
3957         pm_runtime_use_autosuspend(dev);
3958         pm_runtime_mark_last_busy(dev);
3959         pm_runtime_put_autosuspend(dev);
3960
3961         return 0;
3962
3963 err_pm_runtime:
3964         pm_runtime_put_noidle(dev);
3965         pm_runtime_disable(dev);
3966         v4l2_ctrl_handler_free(&sensor->ctrls.handler);
3967         ov5640_sensor_suspend(dev);
3968 entity_cleanup:
3969         media_entity_cleanup(&sensor->sd.entity);
3970         mutex_destroy(&sensor->lock);
3971         return ret;
3972 }
3973
3974 static void ov5640_remove(struct i2c_client *client)
3975 {
3976         struct v4l2_subdev *sd = i2c_get_clientdata(client);
3977         struct ov5640_dev *sensor = to_ov5640_dev(sd);
3978         struct device *dev = &client->dev;
3979
3980         pm_runtime_disable(dev);
3981         if (!pm_runtime_status_suspended(dev))
3982                 ov5640_sensor_suspend(dev);
3983         pm_runtime_set_suspended(dev);
3984
3985         v4l2_async_unregister_subdev(&sensor->sd);
3986         media_entity_cleanup(&sensor->sd.entity);
3987         v4l2_ctrl_handler_free(&sensor->ctrls.handler);
3988         mutex_destroy(&sensor->lock);
3989 }
3990
3991 static const struct dev_pm_ops ov5640_pm_ops = {
3992         SET_RUNTIME_PM_OPS(ov5640_sensor_suspend, ov5640_sensor_resume, NULL)
3993 };
3994
3995 static const struct i2c_device_id ov5640_id[] = {
3996         {"ov5640", 0},
3997         {},
3998 };
3999 MODULE_DEVICE_TABLE(i2c, ov5640_id);
4000
4001 static const struct of_device_id ov5640_dt_ids[] = {
4002         { .compatible = "ovti,ov5640" },
4003         { /* sentinel */ }
4004 };
4005 MODULE_DEVICE_TABLE(of, ov5640_dt_ids);
4006
4007 static struct i2c_driver ov5640_i2c_driver = {
4008         .driver = {
4009                 .name  = "ov5640",
4010                 .of_match_table = ov5640_dt_ids,
4011                 .pm = &ov5640_pm_ops,
4012         },
4013         .id_table = ov5640_id,
4014         .probe_new = ov5640_probe,
4015         .remove   = ov5640_remove,
4016 };
4017
4018 module_i2c_driver(ov5640_i2c_driver);
4019
4020 MODULE_DESCRIPTION("OV5640 MIPI Camera Subdev Driver");
4021 MODULE_LICENSE("GPL");