drivers/media/i2c/ov2680.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Omnivision OV2680 CMOS Image Sensor driver
   4  *
   5  * Copyright (C) 2018 Linaro Ltd
   6  *
   7  * Based on OV5640 Sensor Driver
   8  * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
   9  * Copyright (C) 2014-2017 Mentor Graphics Inc.
  10  *
  11  */
  12
  13 #include <linux/clk.h>
  14 #include <linux/delay.h>
  15 #include <linux/err.h>
  16 #include <linux/gpio/consumer.h>
  17 #include <linux/i2c.h>
  18 #include <linux/init.h>
  19 #include <linux/mod_devicetable.h>
  20 #include <linux/module.h>
  21 #include <linux/pm_runtime.h>
  22 #include <linux/regmap.h>
  23 #include <linux/regulator/consumer.h>
  24
  25 #include <media/v4l2-cci.h>
  26 #include <media/v4l2-common.h>
  27 #include <media/v4l2-ctrls.h>
  28 #include <media/v4l2-fwnode.h>
  29 #include <media/v4l2-subdev.h>
  30
  31 #define OV2680_CHIP_ID                          0x2680
  32
  33 #define OV2680_REG_STREAM_CTRL                  CCI_REG8(0x0100)
  34 #define OV2680_REG_SOFT_RESET                   CCI_REG8(0x0103)
  35
  36 #define OV2680_REG_CHIP_ID                      CCI_REG16(0x300a)
  37 #define OV2680_REG_SC_CMMN_SUB_ID               CCI_REG8(0x302a)
  38 #define OV2680_REG_PLL_MULTIPLIER               CCI_REG16(0x3081)
  39
  40 #define OV2680_REG_EXPOSURE_PK                  CCI_REG24(0x3500)
  41 #define OV2680_REG_R_MANUAL                     CCI_REG8(0x3503)
  42 #define OV2680_REG_GAIN_PK                      CCI_REG16(0x350a)
  43
  44 #define OV2680_REG_SENSOR_CTRL_0A               CCI_REG8(0x370a)
  45
  46 #define OV2680_REG_HORIZONTAL_START             CCI_REG16(0x3800)
  47 #define OV2680_REG_VERTICAL_START               CCI_REG16(0x3802)
  48 #define OV2680_REG_HORIZONTAL_END               CCI_REG16(0x3804)
  49 #define OV2680_REG_VERTICAL_END                 CCI_REG16(0x3806)
  50 #define OV2680_REG_HORIZONTAL_OUTPUT_SIZE       CCI_REG16(0x3808)
  51 #define OV2680_REG_VERTICAL_OUTPUT_SIZE         CCI_REG16(0x380a)
  52 #define OV2680_REG_TIMING_HTS                   CCI_REG16(0x380c)
  53 #define OV2680_REG_TIMING_VTS                   CCI_REG16(0x380e)
  54 #define OV2680_REG_ISP_X_WIN                    CCI_REG16(0x3810)
  55 #define OV2680_REG_ISP_Y_WIN                    CCI_REG16(0x3812)
  56 #define OV2680_REG_X_INC                        CCI_REG8(0x3814)
  57 #define OV2680_REG_Y_INC                        CCI_REG8(0x3815)
  58 #define OV2680_REG_FORMAT1                      CCI_REG8(0x3820)
  59 #define OV2680_REG_FORMAT2                      CCI_REG8(0x3821)
  60
  61 #define OV2680_REG_ISP_CTRL00                   CCI_REG8(0x5080)
  62
  63 #define OV2680_REG_X_WIN                        CCI_REG16(0x5704)
  64 #define OV2680_REG_Y_WIN                        CCI_REG16(0x5706)
  65
  66 #define OV2680_FRAME_RATE                       30
  67
  68 #define OV2680_NATIVE_WIDTH                     1616
  69 #define OV2680_NATIVE_HEIGHT                    1216
  70 #define OV2680_NATIVE_START_LEFT                0
  71 #define OV2680_NATIVE_START_TOP                 0
  72 #define OV2680_ACTIVE_WIDTH                     1600
  73 #define OV2680_ACTIVE_HEIGHT                    1200
  74 #define OV2680_ACTIVE_START_LEFT                8
  75 #define OV2680_ACTIVE_START_TOP                 8
  76 #define OV2680_MIN_CROP_WIDTH                   2
  77 #define OV2680_MIN_CROP_HEIGHT                  2
  78
  79 /* Fixed pre-div of 1/2 */
  80 #define OV2680_PLL_PREDIV0                      2
  81
  82 /* Pre-div configurable through reg 0x3080, left at its default of 0x02 : 1/2 */
  83 #define OV2680_PLL_PREDIV                       2
  84
  85 /* 66MHz pixel clock: 66MHz / 1704 * 1294 = 30fps */
  86 #define OV2680_PIXELS_PER_LINE                  1704
  87 #define OV2680_LINES_PER_FRAME                  1294
  88
  89 /* If possible send 16 extra rows / lines to the ISP as padding */
  90 #define OV2680_END_MARGIN                       16
  91
  92 /* Max exposure time is VTS - 8 */
  93 #define OV2680_INTEGRATION_TIME_MARGIN          8
  94
  95 #define OV2680_DEFAULT_WIDTH                    800
  96 #define OV2680_DEFAULT_HEIGHT                   600
  97
  98 /* For enum_frame_size() full-size + binned-/quarter-size */
  99 #define OV2680_FRAME_SIZES                      2
 100
 101 static const char * const ov2680_supply_name[] = {
 102         "DOVDD",
 103         "DVDD",
 104         "AVDD",
 105 };
 106
 107 #define OV2680_NUM_SUPPLIES ARRAY_SIZE(ov2680_supply_name)
 108
 109 enum {
 110         OV2680_19_2_MHZ,
 111         OV2680_24_MHZ,
 112 };
 113
 114 static const unsigned long ov2680_xvclk_freqs[] = {
 115         [OV2680_19_2_MHZ] = 19200000,
 116         [OV2680_24_MHZ] = 24000000,
 117 };
 118
 119 static const u8 ov2680_pll_multipliers[] = {
 120         [OV2680_19_2_MHZ] = 69,
 121         [OV2680_24_MHZ] = 55,
 122 };
 123
 124 struct ov2680_ctrls {
 125         struct v4l2_ctrl_handler handler;
 126         struct v4l2_ctrl *exposure;
 127         struct v4l2_ctrl *gain;
 128         struct v4l2_ctrl *hflip;
 129         struct v4l2_ctrl *vflip;
 130         struct v4l2_ctrl *test_pattern;
 131         struct v4l2_ctrl *link_freq;
 132         struct v4l2_ctrl *pixel_rate;
 133 };
 134
 135 struct ov2680_mode {
 136         struct v4l2_rect                crop;
 137         struct v4l2_mbus_framefmt       fmt;
 138         struct v4l2_fract               frame_interval;
 139         bool                            binning;
 140         u16                             h_start;
 141         u16                             v_start;
 142         u16                             h_end;
 143         u16                             v_end;
 144         u16                             h_output_size;
 145         u16                             v_output_size;
 146         u16                             hts;
 147         u16                             vts;
 148 };
 149
 150 struct ov2680_dev {
 151         struct device                   *dev;
 152         struct regmap                   *regmap;
 153         struct v4l2_subdev              sd;
 154
 155         struct media_pad                pad;
 156         struct clk                      *xvclk;
 157         u32                             xvclk_freq;
 158         u8                              pll_mult;
 159         s64                             link_freq[1];
 160         u64                             pixel_rate;
 161         struct regulator_bulk_data      supplies[OV2680_NUM_SUPPLIES];
 162
 163         struct gpio_desc                *pwdn_gpio;
 164         struct mutex                    lock; /* protect members */
 165
 166         bool                            is_streaming;
 167
 168         struct ov2680_ctrls             ctrls;
 169         struct ov2680_mode              mode;
 170 };
 171
 172 static const struct v4l2_rect ov2680_default_crop = {
 173         .left = OV2680_ACTIVE_START_LEFT,
 174         .top = OV2680_ACTIVE_START_TOP,
 175         .width = OV2680_ACTIVE_WIDTH,
 176         .height = OV2680_ACTIVE_HEIGHT,
 177 };
 178
 179 static const char * const test_pattern_menu[] = {
 180         "Disabled",
 181         "Color Bars",
 182         "Random Data",
 183         "Square",
 184         "Black Image",
 185 };
 186
 187 static const int ov2680_hv_flip_bayer_order[] = {
 188         MEDIA_BUS_FMT_SBGGR10_1X10,
 189         MEDIA_BUS_FMT_SGRBG10_1X10,
 190         MEDIA_BUS_FMT_SGBRG10_1X10,
 191         MEDIA_BUS_FMT_SRGGB10_1X10,
 192 };
 193
 194 static const struct reg_sequence ov2680_global_setting[] = {
 195         /* MIPI PHY, 0x10 -> 0x1c enable bp_c_hs_en_lat and bp_d_hs_en_lat */
 196         {0x3016, 0x1c},
 197
 198         /* R MANUAL set exposure and gain to manual (hw does not do auto) */
 199         {0x3503, 0x03},
 200
 201         /* Analog control register tweaks */
 202         {0x3603, 0x39}, /* Reset value 0x99 */
 203         {0x3604, 0x24}, /* Reset value 0x74 */
 204         {0x3621, 0x37}, /* Reset value 0x44 */
 205
 206         /* Sensor control register tweaks */
 207         {0x3701, 0x64}, /* Reset value 0x61 */
 208         {0x3705, 0x3c}, /* Reset value 0x21 */
 209         {0x370c, 0x50}, /* Reset value 0x10 */
 210         {0x370d, 0xc0}, /* Reset value 0x00 */
 211         {0x3718, 0x88}, /* Reset value 0x80 */
 212
 213         /* PSRAM tweaks */
 214         {0x3781, 0x80}, /* Reset value 0x00 */
 215         {0x3784, 0x0c}, /* Reset value 0x00, based on OV2680_R1A_AM10.ovt */
 216         {0x3789, 0x60}, /* Reset value 0x50 */
 217
 218         /* BLC CTRL00 0x01 -> 0x81 set avg_weight to 8 */
 219         {0x4000, 0x81},
 220
 221         /* Set black level compensation range to 0 - 3 (default 0 - 11) */
 222         {0x4008, 0x00},
 223         {0x4009, 0x03},
 224
 225         /* VFIFO R2 0x00 -> 0x02 set Frame reset enable */
 226         {0x4602, 0x02},
 227
 228         /* MIPI ctrl CLK PREPARE MIN change from 0x26 (38) -> 0x36 (54) */
 229         {0x481f, 0x36},
 230
 231         /* MIPI ctrl CLK LPX P MIN change from 0x32 (50) -> 0x36 (54) */
 232         {0x4825, 0x36},
 233
 234         /* R ISP CTRL2 0x20 -> 0x30, set sof_sel bit */
 235         {0x5002, 0x30},
 236
 237         /*
 238          * Window CONTROL 0x00 -> 0x01, enable manual window control,
 239          * this is necessary for full size flip and mirror support.
 240          */
 241         {0x5708, 0x01},
 242
 243         /*
 244          * DPC CTRL0 0x14 -> 0x3e, set enable_tail, enable_3x3_cluster
 245          * and enable_general_tail bits based OV2680_R1A_AM10.ovt.
 246          */
 247         {0x5780, 0x3e},
 248
 249         /* DPC MORE CONNECTION CASE THRE 0x0c (12) -> 0x02 (2) */
 250         {0x5788, 0x02},
 251
 252         /* DPC GAIN LIST1 0x0f (15) -> 0x08 (8) */
 253         {0x578e, 0x08},
 254
 255         /* DPC GAIN LIST2 0x3f (63) -> 0x0c (12) */
 256         {0x578f, 0x0c},
 257
 258         /* DPC THRE RATIO 0x04 (4) -> 0x00 (0) */
 259         {0x5792, 0x00},
 260 };
 261
 262 static struct ov2680_dev *to_ov2680_dev(struct v4l2_subdev *sd)
 263 {
 264         return container_of(sd, struct ov2680_dev, sd);
 265 }
 266
 267 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
 268 {
 269         return &container_of(ctrl->handler, struct ov2680_dev,
 270                              ctrls.handler)->sd;
 271 }
 272
 273 static void ov2680_power_up(struct ov2680_dev *sensor)
 274 {
 275         if (!sensor->pwdn_gpio)
 276                 return;
 277
 278         gpiod_set_value(sensor->pwdn_gpio, 0);
 279         usleep_range(5000, 10000);
 280 }
 281
 282 static void ov2680_power_down(struct ov2680_dev *sensor)
 283 {
 284         if (!sensor->pwdn_gpio)
 285                 return;
 286
 287         gpiod_set_value(sensor->pwdn_gpio, 1);
 288         usleep_range(5000, 10000);
 289 }
 290
 291 static void ov2680_set_bayer_order(struct ov2680_dev *sensor,
 292                                    struct v4l2_mbus_framefmt *fmt)
 293 {
 294         int hv_flip = 0;
 295
 296         if (sensor->ctrls.vflip && sensor->ctrls.vflip->val)
 297                 hv_flip += 1;
 298
 299         if (sensor->ctrls.hflip && sensor->ctrls.hflip->val)
 300                 hv_flip += 2;
 301
 302         fmt->code = ov2680_hv_flip_bayer_order[hv_flip];
 303 }
 304
 305 static struct v4l2_mbus_framefmt *
 306 __ov2680_get_pad_format(struct ov2680_dev *sensor,
 307                         struct v4l2_subdev_state *state,
 308                         unsigned int pad,
 309                         enum v4l2_subdev_format_whence which)
 310 {
 311         if (which == V4L2_SUBDEV_FORMAT_TRY)
 312                 return v4l2_subdev_get_try_format(&sensor->sd, state, pad);
 313
 314         return &sensor->mode.fmt;
 315 }
 316
 317 static struct v4l2_rect *
 318 __ov2680_get_pad_crop(struct ov2680_dev *sensor,
 319                       struct v4l2_subdev_state *state,
 320                       unsigned int pad,
 321                       enum v4l2_subdev_format_whence which)
 322 {
 323         if (which == V4L2_SUBDEV_FORMAT_TRY)
 324                 return v4l2_subdev_get_try_crop(&sensor->sd, state, pad);
 325
 326         return &sensor->mode.crop;
 327 }
 328
 329 static void ov2680_fill_format(struct ov2680_dev *sensor,
 330                                struct v4l2_mbus_framefmt *fmt,
 331                                unsigned int width, unsigned int height)
 332 {
 333         memset(fmt, 0, sizeof(*fmt));
 334         fmt->width = width;
 335         fmt->height = height;
 336         fmt->field = V4L2_FIELD_NONE;
 337         fmt->colorspace = V4L2_COLORSPACE_SRGB;
 338         ov2680_set_bayer_order(sensor, fmt);
 339 }
 340
 341 static void ov2680_calc_mode(struct ov2680_dev *sensor)
 342 {
 343         int width = sensor->mode.fmt.width;
 344         int height = sensor->mode.fmt.height;
 345         int orig_width = width;
 346         int orig_height = height;
 347
 348         if (width  <= (sensor->mode.crop.width / 2) &&
 349             height <= (sensor->mode.crop.height / 2)) {
 350                 sensor->mode.binning = true;
 351                 width *= 2;
 352                 height *= 2;
 353         } else {
 354                 sensor->mode.binning = false;
 355         }
 356
 357         sensor->mode.h_start = (sensor->mode.crop.left +
 358                                 (sensor->mode.crop.width - width) / 2) & ~1;
 359         sensor->mode.v_start = (sensor->mode.crop.top +
 360                                 (sensor->mode.crop.height - height) / 2) & ~1;
 361         sensor->mode.h_end =
 362                 min(sensor->mode.h_start + width + OV2680_END_MARGIN - 1,
 363                     OV2680_NATIVE_WIDTH - 1);
 364         sensor->mode.v_end =
 365                 min(sensor->mode.v_start + height + OV2680_END_MARGIN - 1,
 366                     OV2680_NATIVE_HEIGHT - 1);
 367         sensor->mode.h_output_size = orig_width;
 368         sensor->mode.v_output_size = orig_height;
 369         sensor->mode.hts = OV2680_PIXELS_PER_LINE;
 370         sensor->mode.vts = OV2680_LINES_PER_FRAME;
 371 }
 372
 373 static int ov2680_set_mode(struct ov2680_dev *sensor)
 374 {
 375         u8 sensor_ctrl_0a, inc, fmt1, fmt2;
 376         int ret = 0;
 377
 378         if (sensor->mode.binning) {
 379                 sensor_ctrl_0a = 0x23;
 380                 inc = 0x31;
 381                 fmt1 = 0xc2;
 382                 fmt2 = 0x01;
 383         } else {
 384                 sensor_ctrl_0a = 0x21;
 385                 inc = 0x11;
 386                 fmt1 = 0xc0;
 387                 fmt2 = 0x00;
 388         }
 389
 390         cci_write(sensor->regmap, OV2680_REG_SENSOR_CTRL_0A,
 391                   sensor_ctrl_0a, &ret);
 392         cci_write(sensor->regmap, OV2680_REG_HORIZONTAL_START,
 393                   sensor->mode.h_start, &ret);
 394         cci_write(sensor->regmap, OV2680_REG_VERTICAL_START,
 395                   sensor->mode.v_start, &ret);
 396         cci_write(sensor->regmap, OV2680_REG_HORIZONTAL_END,
 397                   sensor->mode.h_end, &ret);
 398         cci_write(sensor->regmap, OV2680_REG_VERTICAL_END,
 399                   sensor->mode.v_end, &ret);
 400         cci_write(sensor->regmap, OV2680_REG_HORIZONTAL_OUTPUT_SIZE,
 401                   sensor->mode.h_output_size, &ret);
 402         cci_write(sensor->regmap, OV2680_REG_VERTICAL_OUTPUT_SIZE,
 403                   sensor->mode.v_output_size, &ret);
 404         cci_write(sensor->regmap, OV2680_REG_TIMING_HTS,
 405                   sensor->mode.hts, &ret);
 406         cci_write(sensor->regmap, OV2680_REG_TIMING_VTS,
 407                   sensor->mode.vts, &ret);
 408         cci_write(sensor->regmap, OV2680_REG_ISP_X_WIN, 0, &ret);
 409         cci_write(sensor->regmap, OV2680_REG_ISP_Y_WIN, 0, &ret);
 410         cci_write(sensor->regmap, OV2680_REG_X_INC, inc, &ret);
 411         cci_write(sensor->regmap, OV2680_REG_Y_INC, inc, &ret);
 412         cci_write(sensor->regmap, OV2680_REG_X_WIN,
 413                   sensor->mode.h_output_size, &ret);
 414         cci_write(sensor->regmap, OV2680_REG_Y_WIN,
 415                   sensor->mode.v_output_size, &ret);
 416         cci_write(sensor->regmap, OV2680_REG_FORMAT1, fmt1, &ret);
 417         cci_write(sensor->regmap, OV2680_REG_FORMAT2, fmt2, &ret);
 418
 419         return ret;
 420 }
 421
 422 static int ov2680_set_vflip(struct ov2680_dev *sensor, s32 val)
 423 {
 424         int ret;
 425
 426         if (sensor->is_streaming)
 427                 return -EBUSY;
 428
 429         ret = cci_update_bits(sensor->regmap, OV2680_REG_FORMAT1,
 430                               BIT(2), val ? BIT(2) : 0, NULL);
 431         if (ret < 0)
 432                 return ret;
 433
 434         ov2680_set_bayer_order(sensor, &sensor->mode.fmt);
 435         return 0;
 436 }
 437
 438 static int ov2680_set_hflip(struct ov2680_dev *sensor, s32 val)
 439 {
 440         int ret;
 441
 442         if (sensor->is_streaming)
 443                 return -EBUSY;
 444
 445         ret = cci_update_bits(sensor->regmap, OV2680_REG_FORMAT2,
 446                               BIT(2), val ? BIT(2) : 0, NULL);
 447         if (ret < 0)
 448                 return ret;
 449
 450         ov2680_set_bayer_order(sensor, &sensor->mode.fmt);
 451         return 0;
 452 }
 453
 454 static int ov2680_test_pattern_set(struct ov2680_dev *sensor, int value)
 455 {
 456         int ret = 0;
 457
 458         if (!value)
 459                 return cci_update_bits(sensor->regmap, OV2680_REG_ISP_CTRL00,
 460                                        BIT(7), 0, NULL);
 461
 462         cci_update_bits(sensor->regmap, OV2680_REG_ISP_CTRL00,
 463                         0x03, value - 1, &ret);
 464         cci_update_bits(sensor->regmap, OV2680_REG_ISP_CTRL00,
 465                         BIT(7), BIT(7), &ret);
 466
 467         return ret;
 468 }
 469
 470 static int ov2680_gain_set(struct ov2680_dev *sensor, u32 gain)
 471 {
 472         return cci_write(sensor->regmap, OV2680_REG_GAIN_PK, gain, NULL);
 473 }
 474
 475 static int ov2680_exposure_set(struct ov2680_dev *sensor, u32 exp)
 476 {
 477         return cci_write(sensor->regmap, OV2680_REG_EXPOSURE_PK, exp << 4,
 478                          NULL);
 479 }
 480
 481 static int ov2680_stream_enable(struct ov2680_dev *sensor)
 482 {
 483         int ret;
 484
 485         ret = cci_write(sensor->regmap, OV2680_REG_PLL_MULTIPLIER,
 486                         sensor->pll_mult, NULL);
 487         if (ret < 0)
 488                 return ret;
 489
 490         ret = regmap_multi_reg_write(sensor->regmap,
 491                                      ov2680_global_setting,
 492                                      ARRAY_SIZE(ov2680_global_setting));
 493         if (ret < 0)
 494                 return ret;
 495
 496         ret = ov2680_set_mode(sensor);
 497         if (ret < 0)
 498                 return ret;
 499
 500         /* Restore value of all ctrls */
 501         ret = __v4l2_ctrl_handler_setup(&sensor->ctrls.handler);
 502         if (ret < 0)
 503                 return ret;
 504
 505         return cci_write(sensor->regmap, OV2680_REG_STREAM_CTRL, 1, NULL);
 506 }
 507
 508 static int ov2680_stream_disable(struct ov2680_dev *sensor)
 509 {
 510         return cci_write(sensor->regmap, OV2680_REG_STREAM_CTRL, 0, NULL);
 511 }
 512
 513 static int ov2680_power_off(struct ov2680_dev *sensor)
 514 {
 515         clk_disable_unprepare(sensor->xvclk);
 516         ov2680_power_down(sensor);
 517         regulator_bulk_disable(OV2680_NUM_SUPPLIES, sensor->supplies);
 518         return 0;
 519 }
 520
 521 static int ov2680_power_on(struct ov2680_dev *sensor)
 522 {
 523         int ret;
 524
 525         ret = regulator_bulk_enable(OV2680_NUM_SUPPLIES, sensor->supplies);
 526         if (ret < 0) {
 527                 dev_err(sensor->dev, "failed to enable regulators: %d\n", ret);
 528                 return ret;
 529         }
 530
 531         if (!sensor->pwdn_gpio) {
 532                 ret = cci_write(sensor->regmap, OV2680_REG_SOFT_RESET, 0x01,
 533                                 NULL);
 534                 if (ret != 0) {
 535                         dev_err(sensor->dev, "sensor soft reset failed\n");
 536                         goto err_disable_regulators;
 537                 }
 538                 usleep_range(1000, 2000);
 539         } else {
 540                 ov2680_power_down(sensor);
 541                 ov2680_power_up(sensor);
 542         }
 543
 544         ret = clk_prepare_enable(sensor->xvclk);
 545         if (ret < 0)
 546                 goto err_disable_regulators;
 547
 548         return 0;
 549
 550 err_disable_regulators:
 551         regulator_bulk_disable(OV2680_NUM_SUPPLIES, sensor->supplies);
 552         return ret;
 553 }
 554
 555 static int ov2680_s_g_frame_interval(struct v4l2_subdev *sd,
 556                                      struct v4l2_subdev_frame_interval *fi)
 557 {
 558         struct ov2680_dev *sensor = to_ov2680_dev(sd);
 559
 560         mutex_lock(&sensor->lock);
 561         fi->interval = sensor->mode.frame_interval;
 562         mutex_unlock(&sensor->lock);
 563
 564         return 0;
 565 }
 566
 567 static int ov2680_s_stream(struct v4l2_subdev *sd, int enable)
 568 {
 569         struct ov2680_dev *sensor = to_ov2680_dev(sd);
 570         int ret = 0;
 571
 572         mutex_lock(&sensor->lock);
 573
 574         if (sensor->is_streaming == !!enable)
 575                 goto unlock;
 576
 577         if (enable) {
 578                 ret = pm_runtime_resume_and_get(sensor->sd.dev);
 579                 if (ret < 0)
 580                         goto unlock;
 581
 582                 ret = ov2680_stream_enable(sensor);
 583                 if (ret < 0) {
 584                         pm_runtime_put(sensor->sd.dev);
 585                         goto unlock;
 586                 }
 587         } else {
 588                 ret = ov2680_stream_disable(sensor);
 589                 pm_runtime_put(sensor->sd.dev);
 590         }
 591
 592         sensor->is_streaming = !!enable;
 593
 594 unlock:
 595         mutex_unlock(&sensor->lock);
 596
 597         return ret;
 598 }
 599
 600 static int ov2680_enum_mbus_code(struct v4l2_subdev *sd,
 601                                  struct v4l2_subdev_state *sd_state,
 602                                  struct v4l2_subdev_mbus_code_enum *code)
 603 {
 604         struct ov2680_dev *sensor = to_ov2680_dev(sd);
 605
 606         if (code->index != 0)
 607                 return -EINVAL;
 608
 609         code->code = sensor->mode.fmt.code;
 610
 611         return 0;
 612 }
 613
 614 static int ov2680_get_fmt(struct v4l2_subdev *sd,
 615                           struct v4l2_subdev_state *sd_state,
 616                           struct v4l2_subdev_format *format)
 617 {
 618         struct ov2680_dev *sensor = to_ov2680_dev(sd);
 619         struct v4l2_mbus_framefmt *fmt;
 620
 621         fmt = __ov2680_get_pad_format(sensor, sd_state, format->pad,
 622                                       format->which);
 623
 624         mutex_lock(&sensor->lock);
 625         format->format = *fmt;
 626         mutex_unlock(&sensor->lock);
 627
 628         return 0;
 629 }
 630
 631 static int ov2680_set_fmt(struct v4l2_subdev *sd,
 632                           struct v4l2_subdev_state *sd_state,
 633                           struct v4l2_subdev_format *format)
 634 {
 635         struct ov2680_dev *sensor = to_ov2680_dev(sd);
 636         struct v4l2_mbus_framefmt *try_fmt;
 637         const struct v4l2_rect *crop;
 638         unsigned int width, height;
 639         int ret = 0;
 640
 641         crop = __ov2680_get_pad_crop(sensor, sd_state, format->pad,
 642                                      format->which);
 643
 644         /* Limit set_fmt max size to crop width / height */
 645         width = clamp_val(ALIGN(format->format.width, 2),
 646                           OV2680_MIN_CROP_WIDTH, crop->width);
 647         height = clamp_val(ALIGN(format->format.height, 2),
 648                            OV2680_MIN_CROP_HEIGHT, crop->height);
 649
 650         ov2680_fill_format(sensor, &format->format, width, height);
 651
 652         if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
 653                 try_fmt = v4l2_subdev_get_try_format(sd, sd_state, 0);
 654                 *try_fmt = format->format;
 655                 return 0;
 656         }
 657
 658         mutex_lock(&sensor->lock);
 659
 660         if (sensor->is_streaming) {
 661                 ret = -EBUSY;
 662                 goto unlock;
 663         }
 664
 665         sensor->mode.fmt = format->format;
 666         ov2680_calc_mode(sensor);
 667
 668 unlock:
 669         mutex_unlock(&sensor->lock);
 670
 671         return ret;
 672 }
 673
 674 static int ov2680_get_selection(struct v4l2_subdev *sd,
 675                                 struct v4l2_subdev_state *state,
 676                                 struct v4l2_subdev_selection *sel)
 677 {
 678         struct ov2680_dev *sensor = to_ov2680_dev(sd);
 679
 680         switch (sel->target) {
 681         case V4L2_SEL_TGT_CROP:
 682                 mutex_lock(&sensor->lock);
 683                 sel->r = *__ov2680_get_pad_crop(sensor, state, sel->pad,
 684                                                 sel->which);
 685                 mutex_unlock(&sensor->lock);
 686                 break;
 687         case V4L2_SEL_TGT_NATIVE_SIZE:
 688         case V4L2_SEL_TGT_CROP_BOUNDS:
 689                 sel->r.top = 0;
 690                 sel->r.left = 0;
 691                 sel->r.width = OV2680_NATIVE_WIDTH;
 692                 sel->r.height = OV2680_NATIVE_HEIGHT;
 693                 break;
 694         case V4L2_SEL_TGT_CROP_DEFAULT:
 695                 sel->r = ov2680_default_crop;
 696                 break;
 697         default:
 698                 return -EINVAL;
 699         }
 700
 701         return 0;
 702 }
 703
 704 static int ov2680_set_selection(struct v4l2_subdev *sd,
 705                                 struct v4l2_subdev_state *state,
 706                                 struct v4l2_subdev_selection *sel)
 707 {
 708         struct ov2680_dev *sensor = to_ov2680_dev(sd);
 709         struct v4l2_mbus_framefmt *format;
 710         struct v4l2_rect *crop;
 711         struct v4l2_rect rect;
 712
 713         if (sel->target != V4L2_SEL_TGT_CROP)
 714                 return -EINVAL;
 715
 716         /*
 717          * Clamp the boundaries of the crop rectangle to the size of the sensor
 718          * pixel array. Align to multiples of 2 to ensure Bayer pattern isn't
 719          * disrupted.
 720          */
 721         rect.left = clamp_val(ALIGN(sel->r.left, 2),
 722                               OV2680_NATIVE_START_LEFT, OV2680_NATIVE_WIDTH);
 723         rect.top = clamp_val(ALIGN(sel->r.top, 2),
 724                              OV2680_NATIVE_START_TOP, OV2680_NATIVE_HEIGHT);
 725         rect.width = clamp_val(ALIGN(sel->r.width, 2),
 726                                OV2680_MIN_CROP_WIDTH, OV2680_NATIVE_WIDTH);
 727         rect.height = clamp_val(ALIGN(sel->r.height, 2),
 728                                 OV2680_MIN_CROP_HEIGHT, OV2680_NATIVE_HEIGHT);
 729
 730         /* Make sure the crop rectangle isn't outside the bounds of the array */
 731         rect.width = min_t(unsigned int, rect.width,
 732                            OV2680_NATIVE_WIDTH - rect.left);
 733         rect.height = min_t(unsigned int, rect.height,
 734                             OV2680_NATIVE_HEIGHT - rect.top);
 735
 736         crop = __ov2680_get_pad_crop(sensor, state, sel->pad, sel->which);
 737
 738         mutex_lock(&sensor->lock);
 739         if (rect.width != crop->width || rect.height != crop->height) {
 740                 /*
 741                  * Reset the output image size if the crop rectangle size has
 742                  * been modified.
 743                  */
 744                 format = __ov2680_get_pad_format(sensor, state, sel->pad,
 745                                                  sel->which);
 746                 format->width = rect.width;
 747                 format->height = rect.height;
 748         }
 749
 750         *crop = rect;
 751         mutex_unlock(&sensor->lock);
 752
 753         sel->r = rect;
 754
 755         return 0;
 756 }
 757
 758 static int ov2680_init_cfg(struct v4l2_subdev *sd,
 759                            struct v4l2_subdev_state *sd_state)
 760 {
 761         struct ov2680_dev *sensor = to_ov2680_dev(sd);
 762
 763         sd_state->pads[0].try_crop = ov2680_default_crop;
 764
 765         ov2680_fill_format(sensor, &sd_state->pads[0].try_fmt,
 766                            OV2680_DEFAULT_WIDTH, OV2680_DEFAULT_HEIGHT);
 767         return 0;
 768 }
 769
 770 static int ov2680_enum_frame_size(struct v4l2_subdev *sd,
 771                                   struct v4l2_subdev_state *sd_state,
 772                                   struct v4l2_subdev_frame_size_enum *fse)
 773 {
 774         struct ov2680_dev *sensor = to_ov2680_dev(sd);
 775         struct v4l2_rect *crop;
 776
 777         if (fse->index >= OV2680_FRAME_SIZES)
 778                 return -EINVAL;
 779
 780         crop = __ov2680_get_pad_crop(sensor, sd_state, fse->pad, fse->which);
 781         if (!crop)
 782                 return -EINVAL;
 783
 784         fse->min_width = crop->width / (fse->index + 1);
 785         fse->min_height = crop->height / (fse->index + 1);
 786         fse->max_width = fse->min_width;
 787         fse->max_height = fse->min_height;
 788
 789         return 0;
 790 }
 791
 792 static bool ov2680_valid_frame_size(struct v4l2_subdev *sd,
 793                                     struct v4l2_subdev_state *sd_state,
 794                                     struct v4l2_subdev_frame_interval_enum *fie)
 795 {
 796         struct v4l2_subdev_frame_size_enum fse = {
 797                 .pad = fie->pad,
 798                 .which = fie->which,
 799         };
 800         int i;
 801
 802         for (i = 0; i < OV2680_FRAME_SIZES; i++) {
 803                 fse.index = i;
 804
 805                 if (ov2680_enum_frame_size(sd, sd_state, &fse))
 806                         return false;
 807
 808                 if (fie->width == fse.min_width &&
 809                     fie->height == fse.min_height)
 810                         return true;
 811         }
 812
 813         return false;
 814 }
 815
 816 static int ov2680_enum_frame_interval(struct v4l2_subdev *sd,
 817                               struct v4l2_subdev_state *sd_state,
 818                               struct v4l2_subdev_frame_interval_enum *fie)
 819 {
 820         struct ov2680_dev *sensor = to_ov2680_dev(sd);
 821
 822         /* Only 1 framerate */
 823         if (fie->index || !ov2680_valid_frame_size(sd, sd_state, fie))
 824                 return -EINVAL;
 825
 826         fie->interval = sensor->mode.frame_interval;
 827
 828         return 0;
 829 }
 830
 831 static int ov2680_s_ctrl(struct v4l2_ctrl *ctrl)
 832 {
 833         struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
 834         struct ov2680_dev *sensor = to_ov2680_dev(sd);
 835         int ret;
 836
 837         /* Only apply changes to the controls if the device is powered up */
 838         if (!pm_runtime_get_if_in_use(sensor->sd.dev)) {
 839                 ov2680_set_bayer_order(sensor, &sensor->mode.fmt);
 840                 return 0;
 841         }
 842
 843         switch (ctrl->id) {
 844         case V4L2_CID_ANALOGUE_GAIN:
 845                 ret = ov2680_gain_set(sensor, ctrl->val);
 846                 break;
 847         case V4L2_CID_EXPOSURE:
 848                 ret = ov2680_exposure_set(sensor, ctrl->val);
 849                 break;
 850         case V4L2_CID_VFLIP:
 851                 ret = ov2680_set_vflip(sensor, ctrl->val);
 852                 break;
 853         case V4L2_CID_HFLIP:
 854                 ret = ov2680_set_hflip(sensor, ctrl->val);
 855                 break;
 856         case V4L2_CID_TEST_PATTERN:
 857                 ret = ov2680_test_pattern_set(sensor, ctrl->val);
 858                 break;
 859         default:
 860                 ret = -EINVAL;
 861                 break;
 862         }
 863
 864         pm_runtime_put(sensor->sd.dev);
 865         return ret;
 866 }
 867
 868 static const struct v4l2_ctrl_ops ov2680_ctrl_ops = {
 869         .s_ctrl = ov2680_s_ctrl,
 870 };
 871
 872 static const struct v4l2_subdev_video_ops ov2680_video_ops = {
 873         .g_frame_interval       = ov2680_s_g_frame_interval,
 874         .s_frame_interval       = ov2680_s_g_frame_interval,
 875         .s_stream               = ov2680_s_stream,
 876 };
 877
 878 static const struct v4l2_subdev_pad_ops ov2680_pad_ops = {
 879         .init_cfg               = ov2680_init_cfg,
 880         .enum_mbus_code         = ov2680_enum_mbus_code,
 881         .enum_frame_size        = ov2680_enum_frame_size,
 882         .enum_frame_interval    = ov2680_enum_frame_interval,
 883         .get_fmt                = ov2680_get_fmt,
 884         .set_fmt                = ov2680_set_fmt,
 885         .get_selection          = ov2680_get_selection,
 886         .set_selection          = ov2680_set_selection,
 887 };
 888
 889 static const struct v4l2_subdev_ops ov2680_subdev_ops = {
 890         .video  = &ov2680_video_ops,
 891         .pad    = &ov2680_pad_ops,
 892 };
 893
 894 static int ov2680_mode_init(struct ov2680_dev *sensor)
 895 {
 896         /* set initial mode */
 897         sensor->mode.crop = ov2680_default_crop;
 898         ov2680_fill_format(sensor, &sensor->mode.fmt,
 899                            OV2680_DEFAULT_WIDTH, OV2680_DEFAULT_HEIGHT);
 900         ov2680_calc_mode(sensor);
 901
 902         sensor->mode.frame_interval.denominator = OV2680_FRAME_RATE;
 903         sensor->mode.frame_interval.numerator = 1;
 904
 905         return 0;
 906 }
 907
 908 static int ov2680_v4l2_register(struct ov2680_dev *sensor)
 909 {
 910         struct i2c_client *client = to_i2c_client(sensor->dev);
 911         const struct v4l2_ctrl_ops *ops = &ov2680_ctrl_ops;
 912         struct ov2680_ctrls *ctrls = &sensor->ctrls;
 913         struct v4l2_ctrl_handler *hdl = &ctrls->handler;
 914         int exp_max = OV2680_LINES_PER_FRAME - OV2680_INTEGRATION_TIME_MARGIN;
 915         int ret = 0;
 916
 917         v4l2_i2c_subdev_init(&sensor->sd, client, &ov2680_subdev_ops);
 918
 919         sensor->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
 920         sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
 921         sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
 922
 923         ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
 924         if (ret < 0)
 925                 return ret;
 926
 927         v4l2_ctrl_handler_init(hdl, 5);
 928
 929         hdl->lock = &sensor->lock;
 930
 931         ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
 932         ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
 933
 934         ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl,
 935                                         &ov2680_ctrl_ops, V4L2_CID_TEST_PATTERN,
 936                                         ARRAY_SIZE(test_pattern_menu) - 1,
 937                                         0, 0, test_pattern_menu);
 938
 939         ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
 940                                             0, exp_max, 1, exp_max);
 941
 942         ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_ANALOGUE_GAIN,
 943                                         0, 1023, 1, 250);
 944
 945         ctrls->link_freq = v4l2_ctrl_new_int_menu(hdl, NULL, V4L2_CID_LINK_FREQ,
 946                                                   0, 0, sensor->link_freq);
 947         ctrls->pixel_rate = v4l2_ctrl_new_std(hdl, NULL, V4L2_CID_PIXEL_RATE,
 948                                               0, sensor->pixel_rate,
 949                                               1, sensor->pixel_rate);
 950
 951         if (hdl->error) {
 952                 ret = hdl->error;
 953                 goto cleanup_entity;
 954         }
 955
 956         ctrls->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
 957         ctrls->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
 958         ctrls->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
 959
 960         sensor->sd.ctrl_handler = hdl;
 961
 962         ret = v4l2_async_register_subdev(&sensor->sd);
 963         if (ret < 0)
 964                 goto cleanup_entity;
 965
 966         return 0;
 967
 968 cleanup_entity:
 969         media_entity_cleanup(&sensor->sd.entity);
 970         v4l2_ctrl_handler_free(hdl);
 971
 972         return ret;
 973 }
 974
 975 static int ov2680_get_regulators(struct ov2680_dev *sensor)
 976 {
 977         int i;
 978
 979         for (i = 0; i < OV2680_NUM_SUPPLIES; i++)
 980                 sensor->supplies[i].supply = ov2680_supply_name[i];
 981
 982         return devm_regulator_bulk_get(sensor->dev,
 983                                        OV2680_NUM_SUPPLIES, sensor->supplies);
 984 }
 985
 986 static int ov2680_check_id(struct ov2680_dev *sensor)
 987 {
 988         u64 chip_id, rev;
 989         int ret = 0;
 990
 991         cci_read(sensor->regmap, OV2680_REG_CHIP_ID, &chip_id, &ret);
 992         cci_read(sensor->regmap, OV2680_REG_SC_CMMN_SUB_ID, &rev, &ret);
 993         if (ret < 0) {
 994                 dev_err(sensor->dev, "failed to read chip id\n");
 995                 return ret;
 996         }
 997
 998         if (chip_id != OV2680_CHIP_ID) {
 999                 dev_err(sensor->dev, "chip id: 0x%04llx does not match expected 0x%04x\n",
1000                         chip_id, OV2680_CHIP_ID);
1001                 return -ENODEV;
1002         }
1003
1004         dev_info(sensor->dev, "sensor_revision id = 0x%llx, rev= %lld\n",
1005                  chip_id, rev & 0x0f);
1006
1007         return 0;
1008 }
1009
1010 static int ov2680_parse_dt(struct ov2680_dev *sensor)
1011 {
1012         struct v4l2_fwnode_endpoint bus_cfg = {
1013                 .bus_type = V4L2_MBUS_CSI2_DPHY,
1014         };
1015         struct device *dev = sensor->dev;
1016         struct fwnode_handle *ep_fwnode;
1017         struct gpio_desc *gpio;
1018         unsigned int rate = 0;
1019         int i, ret;
1020
1021         /*
1022          * Sometimes the fwnode graph is initialized by the bridge driver.
1023          * Bridge drivers doing this may also add GPIO mappings, wait for this.
1024          */
1025         ep_fwnode = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
1026         if (!ep_fwnode)
1027                 return dev_err_probe(dev, -EPROBE_DEFER,
1028                                      "waiting for fwnode graph endpoint\n");
1029
1030         ret = v4l2_fwnode_endpoint_alloc_parse(ep_fwnode, &bus_cfg);
1031         fwnode_handle_put(ep_fwnode);
1032         if (ret)
1033                 return ret;
1034
1035         /*
1036          * The pin we want is named XSHUTDN in the datasheet. Linux sensor
1037          * drivers have standardized on using "powerdown" as con-id name
1038          * for powerdown or shutdown pins. Older DTB files use "reset",
1039          * so fallback to that if there is no "powerdown" pin.
1040          */
1041         gpio = devm_gpiod_get_optional(dev, "powerdown", GPIOD_OUT_HIGH);
1042         if (!gpio)
1043                 gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
1044
1045         ret = PTR_ERR_OR_ZERO(gpio);
1046         if (ret < 0) {
1047                 dev_dbg(dev, "error while getting reset gpio: %d\n", ret);
1048                 goto out_free_bus_cfg;
1049         }
1050
1051         sensor->pwdn_gpio = gpio;
1052
1053         sensor->xvclk = devm_clk_get_optional(dev, "xvclk");
1054         if (IS_ERR(sensor->xvclk)) {
1055                 ret = dev_err_probe(dev, PTR_ERR(sensor->xvclk),
1056                                     "xvclk clock missing or invalid\n");
1057                 goto out_free_bus_cfg;
1058         }
1059
1060         /*
1061          * We could have either a 24MHz or 19.2MHz clock rate from either DT or
1062          * ACPI... but we also need to support the weird IPU3 case which will
1063          * have an external clock AND a clock-frequency property. Check for the
1064          * clock-frequency property and if found, set that rate if we managed
1065          * to acquire a clock. This should cover the ACPI case. If the system
1066          * uses devicetree then the configured rate should already be set, so
1067          * we can just read it.
1068          */
1069         ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency",
1070                                        &rate);
1071         if (ret && !sensor->xvclk) {
1072                 dev_err_probe(dev, ret, "invalid clock config\n");
1073                 goto out_free_bus_cfg;
1074         }
1075
1076         if (!ret && sensor->xvclk) {
1077                 ret = clk_set_rate(sensor->xvclk, rate);
1078                 if (ret) {
1079                         dev_err_probe(dev, ret, "failed to set clock rate\n");
1080                         goto out_free_bus_cfg;
1081                 }
1082         }
1083
1084         sensor->xvclk_freq = rate ?: clk_get_rate(sensor->xvclk);
1085
1086         for (i = 0; i < ARRAY_SIZE(ov2680_xvclk_freqs); i++) {
1087                 if (sensor->xvclk_freq == ov2680_xvclk_freqs[i])
1088                         break;
1089         }
1090
1091         if (i == ARRAY_SIZE(ov2680_xvclk_freqs)) {
1092                 ret = dev_err_probe(dev, -EINVAL,
1093                                     "unsupported xvclk frequency %d Hz\n",
1094                                     sensor->xvclk_freq);
1095                 goto out_free_bus_cfg;
1096         }
1097
1098         sensor->pll_mult = ov2680_pll_multipliers[i];
1099
1100         sensor->link_freq[0] = sensor->xvclk_freq / OV2680_PLL_PREDIV0 /
1101                                OV2680_PLL_PREDIV * sensor->pll_mult;
1102
1103         /* CSI-2 is double data rate, bus-format is 10 bpp */
1104         sensor->pixel_rate = sensor->link_freq[0] * 2;
1105         do_div(sensor->pixel_rate, 10);
1106
1107         /* Verify bus cfg */
1108         if (bus_cfg.bus.mipi_csi2.num_data_lanes != 1) {
1109                 ret = dev_err_probe(dev, -EINVAL,
1110                                     "only a 1-lane CSI2 config is supported");
1111                 goto out_free_bus_cfg;
1112         }
1113
1114         for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
1115                 if (bus_cfg.link_frequencies[i] == sensor->link_freq[0])
1116                         break;
1117
1118         if (bus_cfg.nr_of_link_frequencies == 0 ||
1119             bus_cfg.nr_of_link_frequencies == i) {
1120                 ret = dev_err_probe(dev, -EINVAL,
1121                                     "supported link freq %lld not found\n",
1122                                     sensor->link_freq[0]);
1123                 goto out_free_bus_cfg;
1124         }
1125
1126 out_free_bus_cfg:
1127         v4l2_fwnode_endpoint_free(&bus_cfg);
1128         return ret;
1129 }
1130
1131 static int ov2680_probe(struct i2c_client *client)
1132 {
1133         struct device *dev = &client->dev;
1134         struct ov2680_dev *sensor;
1135         int ret;
1136
1137         sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
1138         if (!sensor)
1139                 return -ENOMEM;
1140
1141         sensor->dev = &client->dev;
1142
1143         sensor->regmap = devm_cci_regmap_init_i2c(client, 16);
1144         if (IS_ERR(sensor->regmap))
1145                 return PTR_ERR(sensor->regmap);
1146
1147         ret = ov2680_parse_dt(sensor);
1148         if (ret < 0)
1149                 return ret;
1150
1151         ret = ov2680_mode_init(sensor);
1152         if (ret < 0)
1153                 return ret;
1154
1155         ret = ov2680_get_regulators(sensor);
1156         if (ret < 0) {
1157                 dev_err(dev, "failed to get regulators\n");
1158                 return ret;
1159         }
1160
1161         mutex_init(&sensor->lock);
1162
1163         /*
1164          * Power up and verify the chip now, so that if runtime pm is
1165          * disabled the chip is left on and streaming will work.
1166          */
1167         ret = ov2680_power_on(sensor);
1168         if (ret < 0)
1169                 goto lock_destroy;
1170
1171         ret = ov2680_check_id(sensor);
1172         if (ret < 0)
1173                 goto err_powerdown;
1174
1175         pm_runtime_set_active(&client->dev);
1176         pm_runtime_get_noresume(&client->dev);
1177         pm_runtime_enable(&client->dev);
1178
1179         ret = ov2680_v4l2_register(sensor);
1180         if (ret < 0)
1181                 goto err_pm_runtime;
1182
1183         pm_runtime_set_autosuspend_delay(&client->dev, 1000);
1184         pm_runtime_use_autosuspend(&client->dev);
1185         pm_runtime_put_autosuspend(&client->dev);
1186
1187         return 0;
1188
1189 err_pm_runtime:
1190         pm_runtime_disable(&client->dev);
1191         pm_runtime_put_noidle(&client->dev);
1192 err_powerdown:
1193         ov2680_power_off(sensor);
1194 lock_destroy:
1195         dev_err(dev, "ov2680 init fail: %d\n", ret);
1196         mutex_destroy(&sensor->lock);
1197
1198         return ret;
1199 }
1200
1201 static void ov2680_remove(struct i2c_client *client)
1202 {
1203         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1204         struct ov2680_dev *sensor = to_ov2680_dev(sd);
1205
1206         v4l2_async_unregister_subdev(&sensor->sd);
1207         mutex_destroy(&sensor->lock);
1208         media_entity_cleanup(&sensor->sd.entity);
1209         v4l2_ctrl_handler_free(&sensor->ctrls.handler);
1210
1211         /*
1212          * Disable runtime PM. In case runtime PM is disabled in the kernel,
1213          * make sure to turn power off manually.
1214          */
1215         pm_runtime_disable(&client->dev);
1216         if (!pm_runtime_status_suspended(&client->dev))
1217                 ov2680_power_off(sensor);
1218         pm_runtime_set_suspended(&client->dev);
1219 }
1220
1221 static int ov2680_suspend(struct device *dev)
1222 {
1223         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1224         struct ov2680_dev *sensor = to_ov2680_dev(sd);
1225
1226         if (sensor->is_streaming)
1227                 ov2680_stream_disable(sensor);
1228
1229         return ov2680_power_off(sensor);
1230 }
1231
1232 static int ov2680_resume(struct device *dev)
1233 {
1234         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1235         struct ov2680_dev *sensor = to_ov2680_dev(sd);
1236         int ret;
1237
1238         ret = ov2680_power_on(sensor);
1239         if (ret < 0)
1240                 goto stream_disable;
1241
1242         if (sensor->is_streaming) {
1243                 ret = ov2680_stream_enable(sensor);
1244                 if (ret < 0)
1245                         goto stream_disable;
1246         }
1247
1248         return 0;
1249
1250 stream_disable:
1251         ov2680_stream_disable(sensor);
1252         sensor->is_streaming = false;
1253
1254         return ret;
1255 }
1256
1257 static DEFINE_RUNTIME_DEV_PM_OPS(ov2680_pm_ops, ov2680_suspend, ov2680_resume,
1258                                  NULL);
1259
1260 static const struct of_device_id ov2680_dt_ids[] = {
1261         { .compatible = "ovti,ov2680" },
1262         { /* sentinel */ },
1263 };
1264 MODULE_DEVICE_TABLE(of, ov2680_dt_ids);
1265
1266 static const struct acpi_device_id ov2680_acpi_ids[] = {
1267         { "OVTI2680" },
1268         { /* sentinel */ }
1269 };
1270 MODULE_DEVICE_TABLE(acpi, ov2680_acpi_ids);
1271
1272 static struct i2c_driver ov2680_i2c_driver = {
1273         .driver = {
1274                 .name  = "ov2680",
1275                 .pm = pm_sleep_ptr(&ov2680_pm_ops),
1276                 .of_match_table = ov2680_dt_ids,
1277                 .acpi_match_table = ov2680_acpi_ids,
1278         },
1279         .probe          = ov2680_probe,
1280         .remove         = ov2680_remove,
1281 };
1282 module_i2c_driver(ov2680_i2c_driver);
1283
1284 MODULE_AUTHOR("Rui Miguel Silva <rui.silva@linaro.org>");
1285 MODULE_DESCRIPTION("OV2680 CMOS Image Sensor driver");
1286 MODULE_LICENSE("GPL v2");