2179 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * imx274.c - IMX274 CMOS Image Sensor driver4 *5 * Copyright (C) 2017, Leopard Imaging, Inc.6 *7 * Leon Luo <leonl@leopardimaging.com>8 * Edwin Zou <edwinz@leopardimaging.com>9 * Luca Ceresoli <luca@lucaceresoli.net>10 */11 12#include <linux/clk.h>13#include <linux/delay.h>14#include <linux/gpio/consumer.h>15#include <linux/i2c.h>16#include <linux/init.h>17#include <linux/kernel.h>18#include <linux/module.h>19#include <linux/pm_runtime.h>20#include <linux/regmap.h>21#include <linux/regulator/consumer.h>22#include <linux/slab.h>23#include <linux/v4l2-mediabus.h>24#include <linux/videodev2.h>25 26#include <media/v4l2-ctrls.h>27#include <media/v4l2-device.h>28#include <media/v4l2-fwnode.h>29#include <media/v4l2-subdev.h>30 31/*32 * See "SHR, SVR Setting" in datasheet33 */34#define IMX274_DEFAULT_FRAME_LENGTH (4550)35#define IMX274_MAX_FRAME_LENGTH (0x000fffff)36 37/*38 * See "Frame Rate Adjustment" in datasheet39 */40#define IMX274_PIXCLK_CONST1 (72000000)41#define IMX274_PIXCLK_CONST2 (1000000)42 43/*44 * The input gain is shifted by IMX274_GAIN_SHIFT to get45 * decimal number. The real gain is46 * (float)input_gain_value / (1 << IMX274_GAIN_SHIFT)47 */48#define IMX274_GAIN_SHIFT (8)49#define IMX274_GAIN_SHIFT_MASK ((1 << IMX274_GAIN_SHIFT) - 1)50 51/*52 * See "Analog Gain" and "Digital Gain" in datasheet53 * min gain is 1X54 * max gain is calculated based on IMX274_GAIN_REG_MAX55 */56#define IMX274_GAIN_REG_MAX (1957)57#define IMX274_MIN_GAIN (0x01 << IMX274_GAIN_SHIFT)58#define IMX274_MAX_ANALOG_GAIN ((2048 << IMX274_GAIN_SHIFT)\59 / (2048 - IMX274_GAIN_REG_MAX))60#define IMX274_MAX_DIGITAL_GAIN (8)61#define IMX274_DEF_GAIN (20 << IMX274_GAIN_SHIFT)62#define IMX274_GAIN_CONST (2048) /* for gain formula */63 64/*65 * 1 line time in us = (HMAX / 72), minimal is 4 lines66 */67#define IMX274_MIN_EXPOSURE_TIME (4 * 260 / 72)68 69#define IMX274_MAX_WIDTH (3840)70#define IMX274_MAX_HEIGHT (2160)71#define IMX274_MAX_FRAME_RATE (120)72#define IMX274_MIN_FRAME_RATE (5)73#define IMX274_DEF_FRAME_RATE (60)74 75/*76 * register SHR is limited to (SVR value + 1) x VMAX value - 477 */78#define IMX274_SHR_LIMIT_CONST (4)79 80/*81 * Min and max sensor reset delay (microseconds)82 */83#define IMX274_RESET_DELAY1 (2000)84#define IMX274_RESET_DELAY2 (2200)85 86/*87 * shift and mask constants88 */89#define IMX274_SHIFT_8_BITS (8)90#define IMX274_SHIFT_16_BITS (16)91#define IMX274_MASK_LSB_2_BITS (0x03)92#define IMX274_MASK_LSB_3_BITS (0x07)93#define IMX274_MASK_LSB_4_BITS (0x0f)94#define IMX274_MASK_LSB_8_BITS (0x00ff)95 96#define DRIVER_NAME "IMX274"97 98/*99 * IMX274 register definitions100 */101#define IMX274_SHR_REG_MSB 0x300D /* SHR */102#define IMX274_SHR_REG_LSB 0x300C /* SHR */103#define IMX274_SVR_REG_MSB 0x300F /* SVR */104#define IMX274_SVR_REG_LSB 0x300E /* SVR */105#define IMX274_HTRIM_EN_REG 0x3037106#define IMX274_HTRIM_START_REG_LSB 0x3038107#define IMX274_HTRIM_START_REG_MSB 0x3039108#define IMX274_HTRIM_END_REG_LSB 0x303A109#define IMX274_HTRIM_END_REG_MSB 0x303B110#define IMX274_VWIDCUTEN_REG 0x30DD111#define IMX274_VWIDCUT_REG_LSB 0x30DE112#define IMX274_VWIDCUT_REG_MSB 0x30DF113#define IMX274_VWINPOS_REG_LSB 0x30E0114#define IMX274_VWINPOS_REG_MSB 0x30E1115#define IMX274_WRITE_VSIZE_REG_LSB 0x3130116#define IMX274_WRITE_VSIZE_REG_MSB 0x3131117#define IMX274_Y_OUT_SIZE_REG_LSB 0x3132118#define IMX274_Y_OUT_SIZE_REG_MSB 0x3133119#define IMX274_VMAX_REG_1 0x30FA /* VMAX, MSB */120#define IMX274_VMAX_REG_2 0x30F9 /* VMAX */121#define IMX274_VMAX_REG_3 0x30F8 /* VMAX, LSB */122#define IMX274_HMAX_REG_MSB 0x30F7 /* HMAX */123#define IMX274_HMAX_REG_LSB 0x30F6 /* HMAX */124#define IMX274_ANALOG_GAIN_ADDR_LSB 0x300A /* ANALOG GAIN LSB */125#define IMX274_ANALOG_GAIN_ADDR_MSB 0x300B /* ANALOG GAIN MSB */126#define IMX274_DIGITAL_GAIN_REG 0x3012 /* Digital Gain */127#define IMX274_VFLIP_REG 0x301A /* VERTICAL FLIP */128#define IMX274_TEST_PATTERN_REG 0x303D /* TEST PATTERN */129#define IMX274_STANDBY_REG 0x3000 /* STANDBY */130 131#define IMX274_TABLE_WAIT_MS 0132#define IMX274_TABLE_END 1133 134/* regulator supplies */135static const char * const imx274_supply_names[] = {136 "vddl", /* IF (1.2V) supply */137 "vdig", /* Digital Core (1.8V) supply */138 "vana", /* Analog (2.8V) supply */139};140 141#define IMX274_NUM_SUPPLIES ARRAY_SIZE(imx274_supply_names)142 143/*144 * imx274 I2C operation related structure145 */146struct reg_8 {147 u16 addr;148 u8 val;149};150 151static const struct regmap_config imx274_regmap_config = {152 .reg_bits = 16,153 .val_bits = 8,154 .cache_type = REGCACHE_MAPLE,155};156 157/*158 * Parameters for each imx274 readout mode.159 *160 * These are the values to configure the sensor in one of the161 * implemented modes.162 *163 * @init_regs: registers to initialize the mode164 * @wbin_ratio: width downscale factor (e.g. 3 for 1280; 3 = 3840/1280)165 * @hbin_ratio: height downscale factor (e.g. 3 for 720; 3 = 2160/720)166 * @min_frame_len: Minimum frame length for each mode (see "Frame Rate167 * Adjustment (CSI-2)" in the datasheet)168 * @min_SHR: Minimum SHR register value (see "Shutter Setting (CSI-2)" in the169 * datasheet)170 * @max_fps: Maximum frames per second171 * @nocpiop: Number of clocks per internal offset period (see "Integration Time172 * in Each Readout Drive Mode (CSI-2)" in the datasheet)173 */174struct imx274_mode {175 const struct reg_8 *init_regs;176 u8 wbin_ratio;177 u8 hbin_ratio;178 int min_frame_len;179 int min_SHR;180 int max_fps;181 int nocpiop;182};183 184/*185 * imx274 test pattern related structure186 */187enum {188 TEST_PATTERN_DISABLED = 0,189 TEST_PATTERN_ALL_000H,190 TEST_PATTERN_ALL_FFFH,191 TEST_PATTERN_ALL_555H,192 TEST_PATTERN_ALL_AAAH,193 TEST_PATTERN_VSP_5AH, /* VERTICAL STRIPE PATTERN 555H/AAAH */194 TEST_PATTERN_VSP_A5H, /* VERTICAL STRIPE PATTERN AAAH/555H */195 TEST_PATTERN_VSP_05H, /* VERTICAL STRIPE PATTERN 000H/555H */196 TEST_PATTERN_VSP_50H, /* VERTICAL STRIPE PATTERN 555H/000H */197 TEST_PATTERN_VSP_0FH, /* VERTICAL STRIPE PATTERN 000H/FFFH */198 TEST_PATTERN_VSP_F0H, /* VERTICAL STRIPE PATTERN FFFH/000H */199 TEST_PATTERN_H_COLOR_BARS,200 TEST_PATTERN_V_COLOR_BARS,201};202 203static const char * const tp_qmenu[] = {204 "Disabled",205 "All 000h Pattern",206 "All FFFh Pattern",207 "All 555h Pattern",208 "All AAAh Pattern",209 "Vertical Stripe (555h / AAAh)",210 "Vertical Stripe (AAAh / 555h)",211 "Vertical Stripe (000h / 555h)",212 "Vertical Stripe (555h / 000h)",213 "Vertical Stripe (000h / FFFh)",214 "Vertical Stripe (FFFh / 000h)",215 "Vertical Color Bars",216 "Horizontal Color Bars",217};218 219/*220 * All-pixel scan mode (10-bit)221 * imx274 mode1(refer to datasheet) register configuration with222 * 3840x2160 resolution, raw10 data and mipi four lane output223 */224static const struct reg_8 imx274_mode1_3840x2160_raw10[] = {225 {0x3004, 0x01},226 {0x3005, 0x01},227 {0x3006, 0x00},228 {0x3007, 0xa2},229 230 {0x3018, 0xA2}, /* output XVS, HVS */231 232 {0x306B, 0x05},233 {0x30E2, 0x01},234 235 {0x30EE, 0x01},236 {0x3342, 0x0A},237 {0x3343, 0x00},238 {0x3344, 0x16},239 {0x3345, 0x00},240 {0x33A6, 0x01},241 {0x3528, 0x0E},242 {0x3554, 0x1F},243 {0x3555, 0x01},244 {0x3556, 0x01},245 {0x3557, 0x01},246 {0x3558, 0x01},247 {0x3559, 0x00},248 {0x355A, 0x00},249 {0x35BA, 0x0E},250 {0x366A, 0x1B},251 {0x366B, 0x1A},252 {0x366C, 0x19},253 {0x366D, 0x17},254 {0x3A41, 0x08},255 256 {IMX274_TABLE_END, 0x00}257};258 259/*260 * Horizontal/vertical 2/2-line binning261 * (Horizontal and vertical weightedbinning, 10-bit)262 * imx274 mode3(refer to datasheet) register configuration with263 * 1920x1080 resolution, raw10 data and mipi four lane output264 */265static const struct reg_8 imx274_mode3_1920x1080_raw10[] = {266 {0x3004, 0x02},267 {0x3005, 0x21},268 {0x3006, 0x00},269 {0x3007, 0xb1},270 271 {0x3018, 0xA2}, /* output XVS, HVS */272 273 {0x306B, 0x05},274 {0x30E2, 0x02},275 276 {0x30EE, 0x01},277 {0x3342, 0x0A},278 {0x3343, 0x00},279 {0x3344, 0x1A},280 {0x3345, 0x00},281 {0x33A6, 0x01},282 {0x3528, 0x0E},283 {0x3554, 0x00},284 {0x3555, 0x01},285 {0x3556, 0x01},286 {0x3557, 0x01},287 {0x3558, 0x01},288 {0x3559, 0x00},289 {0x355A, 0x00},290 {0x35BA, 0x0E},291 {0x366A, 0x1B},292 {0x366B, 0x1A},293 {0x366C, 0x19},294 {0x366D, 0x17},295 {0x3A41, 0x08},296 297 {IMX274_TABLE_END, 0x00}298};299 300/*301 * Vertical 2/3 subsampling binning horizontal 3 binning302 * imx274 mode5(refer to datasheet) register configuration with303 * 1280x720 resolution, raw10 data and mipi four lane output304 */305static const struct reg_8 imx274_mode5_1280x720_raw10[] = {306 {0x3004, 0x03},307 {0x3005, 0x31},308 {0x3006, 0x00},309 {0x3007, 0xa9},310 311 {0x3018, 0xA2}, /* output XVS, HVS */312 313 {0x306B, 0x05},314 {0x30E2, 0x03},315 316 {0x30EE, 0x01},317 {0x3342, 0x0A},318 {0x3343, 0x00},319 {0x3344, 0x1B},320 {0x3345, 0x00},321 {0x33A6, 0x01},322 {0x3528, 0x0E},323 {0x3554, 0x00},324 {0x3555, 0x01},325 {0x3556, 0x01},326 {0x3557, 0x01},327 {0x3558, 0x01},328 {0x3559, 0x00},329 {0x355A, 0x00},330 {0x35BA, 0x0E},331 {0x366A, 0x1B},332 {0x366B, 0x19},333 {0x366C, 0x17},334 {0x366D, 0x17},335 {0x3A41, 0x04},336 337 {IMX274_TABLE_END, 0x00}338};339 340/*341 * Vertical 2/8 subsampling horizontal 3 binning342 * imx274 mode6(refer to datasheet) register configuration with343 * 1280x540 resolution, raw10 data and mipi four lane output344 */345static const struct reg_8 imx274_mode6_1280x540_raw10[] = {346 {0x3004, 0x04}, /* mode setting */347 {0x3005, 0x31},348 {0x3006, 0x00},349 {0x3007, 0x02}, /* mode setting */350 351 {0x3018, 0xA2}, /* output XVS, HVS */352 353 {0x306B, 0x05},354 {0x30E2, 0x04}, /* mode setting */355 356 {0x30EE, 0x01},357 {0x3342, 0x0A},358 {0x3343, 0x00},359 {0x3344, 0x16},360 {0x3345, 0x00},361 {0x33A6, 0x01},362 {0x3528, 0x0E},363 {0x3554, 0x1F},364 {0x3555, 0x01},365 {0x3556, 0x01},366 {0x3557, 0x01},367 {0x3558, 0x01},368 {0x3559, 0x00},369 {0x355A, 0x00},370 {0x35BA, 0x0E},371 {0x366A, 0x1B},372 {0x366B, 0x1A},373 {0x366C, 0x19},374 {0x366D, 0x17},375 {0x3A41, 0x04},376 377 {IMX274_TABLE_END, 0x00}378};379 380/*381 * imx274 first step register configuration for382 * starting stream383 */384static const struct reg_8 imx274_start_1[] = {385 {IMX274_STANDBY_REG, 0x12},386 387 /* PLRD: clock settings */388 {0x3120, 0xF0},389 {0x3121, 0x00},390 {0x3122, 0x02},391 {0x3129, 0x9C},392 {0x312A, 0x02},393 {0x312D, 0x02},394 395 {0x310B, 0x00},396 397 /* PLSTMG */398 {0x304C, 0x00}, /* PLSTMG01 */399 {0x304D, 0x03},400 {0x331C, 0x1A},401 {0x331D, 0x00},402 {0x3502, 0x02},403 {0x3529, 0x0E},404 {0x352A, 0x0E},405 {0x352B, 0x0E},406 {0x3538, 0x0E},407 {0x3539, 0x0E},408 {0x3553, 0x00},409 {0x357D, 0x05},410 {0x357F, 0x05},411 {0x3581, 0x04},412 {0x3583, 0x76},413 {0x3587, 0x01},414 {0x35BB, 0x0E},415 {0x35BC, 0x0E},416 {0x35BD, 0x0E},417 {0x35BE, 0x0E},418 {0x35BF, 0x0E},419 {0x366E, 0x00},420 {0x366F, 0x00},421 {0x3670, 0x00},422 {0x3671, 0x00},423 424 /* PSMIPI */425 {0x3304, 0x32}, /* PSMIPI1 */426 {0x3305, 0x00},427 {0x3306, 0x32},428 {0x3307, 0x00},429 {0x3590, 0x32},430 {0x3591, 0x00},431 {0x3686, 0x32},432 {0x3687, 0x00},433 434 {IMX274_TABLE_END, 0x00}435};436 437/*438 * imx274 second step register configuration for439 * starting stream440 */441static const struct reg_8 imx274_start_2[] = {442 {IMX274_STANDBY_REG, 0x00},443 {0x303E, 0x02}, /* SYS_MODE = 2 */444 {IMX274_TABLE_END, 0x00}445};446 447/*448 * imx274 third step register configuration for449 * starting stream450 */451static const struct reg_8 imx274_start_3[] = {452 {0x30F4, 0x00},453 {0x3018, 0xA2}, /* XHS VHS OUTPUT */454 {IMX274_TABLE_END, 0x00}455};456 457/*458 * imx274 register configuration for stopping stream459 */460static const struct reg_8 imx274_stop[] = {461 {IMX274_STANDBY_REG, 0x01},462 {IMX274_TABLE_END, 0x00}463};464 465/*466 * imx274 disable test pattern register configuration467 */468static const struct reg_8 imx274_tp_disabled[] = {469 {0x303C, 0x00},470 {0x377F, 0x00},471 {0x3781, 0x00},472 {0x370B, 0x00},473 {IMX274_TABLE_END, 0x00}474};475 476/*477 * imx274 test pattern register configuration478 * reg 0x303D defines the test pattern modes479 */480static const struct reg_8 imx274_tp_regs[] = {481 {0x303C, 0x11},482 {0x370E, 0x01},483 {0x377F, 0x01},484 {0x3781, 0x01},485 {0x370B, 0x11},486 {IMX274_TABLE_END, 0x00}487};488 489/* nocpiop happens to be the same number for the implemented modes */490static const struct imx274_mode imx274_modes[] = {491 {492 /* mode 1, 4K */493 .wbin_ratio = 1, /* 3840 */494 .hbin_ratio = 1, /* 2160 */495 .init_regs = imx274_mode1_3840x2160_raw10,496 .min_frame_len = 4550,497 .min_SHR = 12,498 .max_fps = 60,499 .nocpiop = 112,500 },501 {502 /* mode 3, 1080p */503 .wbin_ratio = 2, /* 1920 */504 .hbin_ratio = 2, /* 1080 */505 .init_regs = imx274_mode3_1920x1080_raw10,506 .min_frame_len = 2310,507 .min_SHR = 8,508 .max_fps = 120,509 .nocpiop = 112,510 },511 {512 /* mode 5, 720p */513 .wbin_ratio = 3, /* 1280 */514 .hbin_ratio = 3, /* 720 */515 .init_regs = imx274_mode5_1280x720_raw10,516 .min_frame_len = 2310,517 .min_SHR = 8,518 .max_fps = 120,519 .nocpiop = 112,520 },521 {522 /* mode 6, 540p */523 .wbin_ratio = 3, /* 1280 */524 .hbin_ratio = 4, /* 540 */525 .init_regs = imx274_mode6_1280x540_raw10,526 .min_frame_len = 2310,527 .min_SHR = 4,528 .max_fps = 120,529 .nocpiop = 112,530 },531};532 533/*534 * struct imx274_ctrls - imx274 ctrl structure535 * @handler: V4L2 ctrl handler structure536 * @exposure: Pointer to expsure ctrl structure537 * @gain: Pointer to gain ctrl structure538 * @vflip: Pointer to vflip ctrl structure539 * @test_pattern: Pointer to test pattern ctrl structure540 */541struct imx274_ctrls {542 struct v4l2_ctrl_handler handler;543 struct v4l2_ctrl *exposure;544 struct v4l2_ctrl *gain;545 struct v4l2_ctrl *vflip;546 struct v4l2_ctrl *test_pattern;547};548 549/*550 * struct stim274 - imx274 device structure551 * @sd: V4L2 subdevice structure552 * @pad: Media pad structure553 * @client: Pointer to I2C client554 * @ctrls: imx274 control structure555 * @crop: rect to be captured556 * @compose: compose rect, i.e. output resolution557 * @format: V4L2 media bus frame format structure558 * (width and height are in sync with the compose rect)559 * @frame_rate: V4L2 frame rate structure560 * @regmap: Pointer to regmap structure561 * @reset_gpio: Pointer to reset gpio562 * @supplies: List of analog and digital supply regulators563 * @inck: Pointer to sensor input clock564 * @lock: Mutex structure565 * @mode: Parameters for the selected readout mode566 */567struct stimx274 {568 struct v4l2_subdev sd;569 struct media_pad pad;570 struct i2c_client *client;571 struct imx274_ctrls ctrls;572 struct v4l2_rect crop;573 struct v4l2_mbus_framefmt format;574 struct v4l2_fract frame_interval;575 struct regmap *regmap;576 struct gpio_desc *reset_gpio;577 struct regulator_bulk_data supplies[IMX274_NUM_SUPPLIES];578 struct clk *inck;579 struct mutex lock; /* mutex lock for operations */580 const struct imx274_mode *mode;581};582 583#define IMX274_ROUND(dim, step, flags) \584 ((flags) & V4L2_SEL_FLAG_GE \585 ? roundup((dim), (step)) \586 : ((flags) & V4L2_SEL_FLAG_LE \587 ? rounddown((dim), (step)) \588 : rounddown((dim) + (step) / 2, (step))))589 590/*591 * Function declaration592 */593static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl);594static int imx274_set_exposure(struct stimx274 *priv, int val);595static int imx274_set_vflip(struct stimx274 *priv, int val);596static int imx274_set_test_pattern(struct stimx274 *priv, int val);597static int __imx274_set_frame_interval(struct stimx274 *priv,598 struct v4l2_fract frame_interval);599 600static inline void msleep_range(unsigned int delay_base)601{602 usleep_range(delay_base * 1000, delay_base * 1000 + 500);603}604 605/*606 * v4l2_ctrl and v4l2_subdev related operations607 */608static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)609{610 return &container_of(ctrl->handler,611 struct stimx274, ctrls.handler)->sd;612}613 614static inline struct stimx274 *to_imx274(struct v4l2_subdev *sd)615{616 return container_of(sd, struct stimx274, sd);617}618 619/*620 * Writing a register table621 *622 * @priv: Pointer to device623 * @table: Table containing register values (with optional delays)624 *625 * This is used to write register table into sensor's reg map.626 *627 * Return: 0 on success, errors otherwise628 */629static int imx274_write_table(struct stimx274 *priv, const struct reg_8 table[])630{631 struct regmap *regmap = priv->regmap;632 int err = 0;633 const struct reg_8 *next;634 u8 val;635 636 int range_start = -1;637 int range_count = 0;638 u8 range_vals[16];639 int max_range_vals = ARRAY_SIZE(range_vals);640 641 for (next = table;; next++) {642 if ((next->addr != range_start + range_count) ||643 (next->addr == IMX274_TABLE_END) ||644 (next->addr == IMX274_TABLE_WAIT_MS) ||645 (range_count == max_range_vals)) {646 if (range_count == 1)647 err = regmap_write(regmap,648 range_start, range_vals[0]);649 else if (range_count > 1)650 err = regmap_bulk_write(regmap, range_start,651 &range_vals[0],652 range_count);653 else654 err = 0;655 656 if (err)657 return err;658 659 range_start = -1;660 range_count = 0;661 662 /* Handle special address values */663 if (next->addr == IMX274_TABLE_END)664 break;665 666 if (next->addr == IMX274_TABLE_WAIT_MS) {667 msleep_range(next->val);668 continue;669 }670 }671 672 val = next->val;673 674 if (range_start == -1)675 range_start = next->addr;676 677 range_vals[range_count++] = val;678 }679 return 0;680}681 682static inline int imx274_write_reg(struct stimx274 *priv, u16 addr, u8 val)683{684 int err;685 686 err = regmap_write(priv->regmap, addr, val);687 if (err)688 dev_err(&priv->client->dev,689 "%s : i2c write failed, %x = %x\n", __func__,690 addr, val);691 else692 dev_dbg(&priv->client->dev,693 "%s : addr 0x%x, val=0x%x\n", __func__,694 addr, val);695 return err;696}697 698/**699 * imx274_read_mbreg - Read a multibyte register.700 *701 * Uses a bulk read where possible.702 *703 * @priv: Pointer to device structure704 * @addr: Address of the LSB register. Other registers must be705 * consecutive, least-to-most significant.706 * @val: Pointer to store the register value (cpu endianness)707 * @nbytes: Number of bytes to read (range: [1..3]).708 * Other bytes are zet to 0.709 *710 * Return: 0 on success, errors otherwise711 */712static int imx274_read_mbreg(struct stimx274 *priv, u16 addr, u32 *val,713 size_t nbytes)714{715 __le32 val_le = 0;716 int err;717 718 err = regmap_bulk_read(priv->regmap, addr, &val_le, nbytes);719 if (err) {720 dev_err(&priv->client->dev,721 "%s : i2c bulk read failed, %x (%zu bytes)\n",722 __func__, addr, nbytes);723 } else {724 *val = le32_to_cpu(val_le);725 dev_dbg(&priv->client->dev,726 "%s : addr 0x%x, val=0x%x (%zu bytes)\n",727 __func__, addr, *val, nbytes);728 }729 730 return err;731}732 733/**734 * imx274_write_mbreg - Write a multibyte register.735 *736 * Uses a bulk write where possible.737 *738 * @priv: Pointer to device structure739 * @addr: Address of the LSB register. Other registers must be740 * consecutive, least-to-most significant.741 * @val: Value to be written to the register (cpu endianness)742 * @nbytes: Number of bytes to write (range: [1..3])743 */744static int imx274_write_mbreg(struct stimx274 *priv, u16 addr, u32 val,745 size_t nbytes)746{747 __le32 val_le = cpu_to_le32(val);748 int err;749 750 err = regmap_bulk_write(priv->regmap, addr, &val_le, nbytes);751 if (err)752 dev_err(&priv->client->dev,753 "%s : i2c bulk write failed, %x = %x (%zu bytes)\n",754 __func__, addr, val, nbytes);755 else756 dev_dbg(&priv->client->dev,757 "%s : addr 0x%x, val=0x%x (%zu bytes)\n",758 __func__, addr, val, nbytes);759 return err;760}761 762/*763 * Set mode registers to start stream.764 * @priv: Pointer to device structure765 *766 * Return: 0 on success, errors otherwise767 */768static int imx274_mode_regs(struct stimx274 *priv)769{770 int err = 0;771 772 err = imx274_write_table(priv, imx274_start_1);773 if (err)774 return err;775 776 err = imx274_write_table(priv, priv->mode->init_regs);777 778 return err;779}780 781/*782 * imx274_start_stream - Function for starting stream per mode index783 * @priv: Pointer to device structure784 *785 * Return: 0 on success, errors otherwise786 */787static int imx274_start_stream(struct stimx274 *priv)788{789 int err = 0;790 791 err = __v4l2_ctrl_handler_setup(&priv->ctrls.handler);792 if (err) {793 dev_err(&priv->client->dev, "Error %d setup controls\n", err);794 return err;795 }796 797 /*798 * Refer to "Standby Cancel Sequence when using CSI-2" in799 * imx274 datasheet, it should wait 10ms or more here.800 * give it 1 extra ms for margin801 */802 msleep_range(11);803 err = imx274_write_table(priv, imx274_start_2);804 if (err)805 return err;806 807 /*808 * Refer to "Standby Cancel Sequence when using CSI-2" in809 * imx274 datasheet, it should wait 7ms or more here.810 * give it 1 extra ms for margin811 */812 msleep_range(8);813 err = imx274_write_table(priv, imx274_start_3);814 if (err)815 return err;816 817 return 0;818}819 820/*821 * imx274_reset - Function called to reset the sensor822 * @priv: Pointer to device structure823 * @rst: Input value for determining the sensor's end state after reset824 *825 * Set the senor in reset and then826 * if rst = 0, keep it in reset;827 * if rst = 1, bring it out of reset.828 *829 */830static void imx274_reset(struct stimx274 *priv, int rst)831{832 gpiod_set_value_cansleep(priv->reset_gpio, 0);833 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2);834 gpiod_set_value_cansleep(priv->reset_gpio, !!rst);835 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2);836}837 838static int imx274_power_on(struct device *dev)839{840 struct i2c_client *client = to_i2c_client(dev);841 struct v4l2_subdev *sd = i2c_get_clientdata(client);842 struct stimx274 *imx274 = to_imx274(sd);843 int ret;844 845 /* keep sensor in reset before power on */846 imx274_reset(imx274, 0);847 848 ret = clk_prepare_enable(imx274->inck);849 if (ret) {850 dev_err(&imx274->client->dev,851 "Failed to enable input clock: %d\n", ret);852 return ret;853 }854 855 ret = regulator_bulk_enable(IMX274_NUM_SUPPLIES, imx274->supplies);856 if (ret) {857 dev_err(&imx274->client->dev,858 "Failed to enable regulators: %d\n", ret);859 goto fail_reg;860 }861 862 udelay(2);863 imx274_reset(imx274, 1);864 865 return 0;866 867fail_reg:868 clk_disable_unprepare(imx274->inck);869 return ret;870}871 872static int imx274_power_off(struct device *dev)873{874 struct i2c_client *client = to_i2c_client(dev);875 struct v4l2_subdev *sd = i2c_get_clientdata(client);876 struct stimx274 *imx274 = to_imx274(sd);877 878 imx274_reset(imx274, 0);879 880 regulator_bulk_disable(IMX274_NUM_SUPPLIES, imx274->supplies);881 882 clk_disable_unprepare(imx274->inck);883 884 return 0;885}886 887static int imx274_regulators_get(struct device *dev, struct stimx274 *imx274)888{889 unsigned int i;890 891 for (i = 0; i < IMX274_NUM_SUPPLIES; i++)892 imx274->supplies[i].supply = imx274_supply_names[i];893 894 return devm_regulator_bulk_get(dev, IMX274_NUM_SUPPLIES,895 imx274->supplies);896}897 898/**899 * imx274_s_ctrl - This is used to set the imx274 V4L2 controls900 * @ctrl: V4L2 control to be set901 *902 * This function is used to set the V4L2 controls for the imx274 sensor.903 *904 * Return: 0 on success, errors otherwise905 */906static int imx274_s_ctrl(struct v4l2_ctrl *ctrl)907{908 struct v4l2_subdev *sd = ctrl_to_sd(ctrl);909 struct stimx274 *imx274 = to_imx274(sd);910 int ret = -EINVAL;911 912 if (!pm_runtime_get_if_in_use(&imx274->client->dev))913 return 0;914 915 dev_dbg(&imx274->client->dev,916 "%s : s_ctrl: %s, value: %d\n", __func__,917 ctrl->name, ctrl->val);918 919 switch (ctrl->id) {920 case V4L2_CID_EXPOSURE:921 dev_dbg(&imx274->client->dev,922 "%s : set V4L2_CID_EXPOSURE\n", __func__);923 ret = imx274_set_exposure(imx274, ctrl->val);924 break;925 926 case V4L2_CID_GAIN:927 dev_dbg(&imx274->client->dev,928 "%s : set V4L2_CID_GAIN\n", __func__);929 ret = imx274_set_gain(imx274, ctrl);930 break;931 932 case V4L2_CID_VFLIP:933 dev_dbg(&imx274->client->dev,934 "%s : set V4L2_CID_VFLIP\n", __func__);935 ret = imx274_set_vflip(imx274, ctrl->val);936 break;937 938 case V4L2_CID_TEST_PATTERN:939 dev_dbg(&imx274->client->dev,940 "%s : set V4L2_CID_TEST_PATTERN\n", __func__);941 ret = imx274_set_test_pattern(imx274, ctrl->val);942 break;943 }944 945 pm_runtime_put(&imx274->client->dev);946 947 return ret;948}949 950static int imx274_binning_goodness(struct stimx274 *imx274,951 int w, int ask_w,952 int h, int ask_h, u32 flags)953{954 struct device *dev = &imx274->client->dev;955 const int goodness = 100000;956 int val = 0;957 958 if (flags & V4L2_SEL_FLAG_GE) {959 if (w < ask_w)960 val -= goodness;961 if (h < ask_h)962 val -= goodness;963 }964 965 if (flags & V4L2_SEL_FLAG_LE) {966 if (w > ask_w)967 val -= goodness;968 if (h > ask_h)969 val -= goodness;970 }971 972 val -= abs(w - ask_w);973 val -= abs(h - ask_h);974 975 dev_dbg(dev, "%s: ask %dx%d, size %dx%d, goodness %d\n",976 __func__, ask_w, ask_h, w, h, val);977 978 return val;979}980 981/**982 * __imx274_change_compose - Helper function to change binning and set both983 * compose and format.984 *985 * We have two entry points to change binning: set_fmt and986 * set_selection(COMPOSE). Both have to compute the new output size987 * and set it in both the compose rect and the frame format size. We988 * also need to do the same things after setting cropping to restore989 * 1:1 binning.990 *991 * This function contains the common code for these three cases, it992 * has many arguments in order to accommodate the needs of all of993 * them.994 *995 * Must be called with imx274->lock locked.996 *997 * @imx274: The device object998 * @sd_state: The subdev state we are editing for TRY requests999 * @which: V4L2_SUBDEV_FORMAT_ACTIVE or V4L2_SUBDEV_FORMAT_TRY from the caller1000 * @width: Input-output parameter: set to the desired width before1001 * the call, contains the chosen value after returning successfully1002 * @height: Input-output parameter for height (see @width)1003 * @flags: Selection flags from struct v4l2_subdev_selection, or 0 if not1004 * available (when called from set_fmt)1005 */1006static int __imx274_change_compose(struct stimx274 *imx274,1007 struct v4l2_subdev_state *sd_state,1008 u32 which,1009 u32 *width,1010 u32 *height,1011 u32 flags)1012{1013 struct device *dev = &imx274->client->dev;1014 const struct v4l2_rect *cur_crop;1015 struct v4l2_mbus_framefmt *tgt_fmt;1016 unsigned int i;1017 const struct imx274_mode *best_mode = &imx274_modes[0];1018 int best_goodness = INT_MIN;1019 1020 if (which == V4L2_SUBDEV_FORMAT_TRY) {1021 cur_crop = v4l2_subdev_state_get_crop(sd_state, 0);1022 tgt_fmt = v4l2_subdev_state_get_format(sd_state, 0);1023 } else {1024 cur_crop = &imx274->crop;1025 tgt_fmt = &imx274->format;1026 }1027 1028 for (i = 0; i < ARRAY_SIZE(imx274_modes); i++) {1029 u8 wratio = imx274_modes[i].wbin_ratio;1030 u8 hratio = imx274_modes[i].hbin_ratio;1031 1032 int goodness = imx274_binning_goodness(1033 imx274,1034 cur_crop->width / wratio, *width,1035 cur_crop->height / hratio, *height,1036 flags);1037 1038 if (goodness >= best_goodness) {1039 best_goodness = goodness;1040 best_mode = &imx274_modes[i];1041 }1042 }1043 1044 *width = cur_crop->width / best_mode->wbin_ratio;1045 *height = cur_crop->height / best_mode->hbin_ratio;1046 1047 if (which == V4L2_SUBDEV_FORMAT_ACTIVE)1048 imx274->mode = best_mode;1049 1050 dev_dbg(dev, "%s: selected %ux%u binning\n",1051 __func__, best_mode->wbin_ratio, best_mode->hbin_ratio);1052 1053 tgt_fmt->width = *width;1054 tgt_fmt->height = *height;1055 tgt_fmt->field = V4L2_FIELD_NONE;1056 1057 return 0;1058}1059 1060/**1061 * imx274_get_fmt - Get the pad format1062 * @sd: Pointer to V4L2 Sub device structure1063 * @sd_state: Pointer to sub device state structure1064 * @fmt: Pointer to pad level media bus format1065 *1066 * This function is used to get the pad format information.1067 *1068 * Return: 0 on success1069 */1070static int imx274_get_fmt(struct v4l2_subdev *sd,1071 struct v4l2_subdev_state *sd_state,1072 struct v4l2_subdev_format *fmt)1073{1074 struct stimx274 *imx274 = to_imx274(sd);1075 1076 mutex_lock(&imx274->lock);1077 fmt->format = imx274->format;1078 mutex_unlock(&imx274->lock);1079 return 0;1080}1081 1082/**1083 * imx274_set_fmt - This is used to set the pad format1084 * @sd: Pointer to V4L2 Sub device structure1085 * @sd_state: Pointer to sub device state information structure1086 * @format: Pointer to pad level media bus format1087 *1088 * This function is used to set the pad format.1089 *1090 * Return: 0 on success1091 */1092static int imx274_set_fmt(struct v4l2_subdev *sd,1093 struct v4l2_subdev_state *sd_state,1094 struct v4l2_subdev_format *format)1095{1096 struct v4l2_mbus_framefmt *fmt = &format->format;1097 struct stimx274 *imx274 = to_imx274(sd);1098 int err = 0;1099 1100 mutex_lock(&imx274->lock);1101 1102 err = __imx274_change_compose(imx274, sd_state, format->which,1103 &fmt->width, &fmt->height, 0);1104 1105 if (err)1106 goto out;1107 1108 /*1109 * __imx274_change_compose already set width and height in the1110 * applicable format, but we need to keep all other format1111 * values, so do a full copy here1112 */1113 fmt->field = V4L2_FIELD_NONE;1114 if (format->which == V4L2_SUBDEV_FORMAT_TRY)1115 *v4l2_subdev_state_get_format(sd_state, 0) = *fmt;1116 else1117 imx274->format = *fmt;1118 1119out:1120 mutex_unlock(&imx274->lock);1121 1122 return err;1123}1124 1125static int imx274_get_selection(struct v4l2_subdev *sd,1126 struct v4l2_subdev_state *sd_state,1127 struct v4l2_subdev_selection *sel)1128{1129 struct stimx274 *imx274 = to_imx274(sd);1130 const struct v4l2_rect *src_crop;1131 const struct v4l2_mbus_framefmt *src_fmt;1132 int ret = 0;1133 1134 if (sel->pad != 0)1135 return -EINVAL;1136 1137 if (sel->target == V4L2_SEL_TGT_CROP_BOUNDS) {1138 sel->r.left = 0;1139 sel->r.top = 0;1140 sel->r.width = IMX274_MAX_WIDTH;1141 sel->r.height = IMX274_MAX_HEIGHT;1142 return 0;1143 }1144 1145 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {1146 src_crop = v4l2_subdev_state_get_crop(sd_state, 0);1147 src_fmt = v4l2_subdev_state_get_format(sd_state, 0);1148 } else {1149 src_crop = &imx274->crop;1150 src_fmt = &imx274->format;1151 }1152 1153 mutex_lock(&imx274->lock);1154 1155 switch (sel->target) {1156 case V4L2_SEL_TGT_CROP:1157 sel->r = *src_crop;1158 break;1159 case V4L2_SEL_TGT_COMPOSE_BOUNDS:1160 sel->r.top = 0;1161 sel->r.left = 0;1162 sel->r.width = src_crop->width;1163 sel->r.height = src_crop->height;1164 break;1165 case V4L2_SEL_TGT_COMPOSE:1166 sel->r.top = 0;1167 sel->r.left = 0;1168 sel->r.width = src_fmt->width;1169 sel->r.height = src_fmt->height;1170 break;1171 default:1172 ret = -EINVAL;1173 }1174 1175 mutex_unlock(&imx274->lock);1176 1177 return ret;1178}1179 1180static int imx274_set_selection_crop(struct stimx274 *imx274,1181 struct v4l2_subdev_state *sd_state,1182 struct v4l2_subdev_selection *sel)1183{1184 struct v4l2_rect *tgt_crop;1185 struct v4l2_rect new_crop;1186 bool size_changed;1187 1188 /*1189 * h_step could be 12 or 24 depending on the binning. But we1190 * won't know the binning until we choose the mode later in1191 * __imx274_change_compose(). Thus let's be safe and use the1192 * most conservative value in all cases.1193 */1194 const u32 h_step = 24;1195 1196 new_crop.width = min_t(u32,1197 IMX274_ROUND(sel->r.width, h_step, sel->flags),1198 IMX274_MAX_WIDTH);1199 1200 /* Constraint: HTRIMMING_END - HTRIMMING_START >= 144 */1201 if (new_crop.width < 144)1202 new_crop.width = 144;1203 1204 new_crop.left = min_t(u32,1205 IMX274_ROUND(sel->r.left, h_step, 0),1206 IMX274_MAX_WIDTH - new_crop.width);1207 1208 new_crop.height = min_t(u32,1209 IMX274_ROUND(sel->r.height, 2, sel->flags),1210 IMX274_MAX_HEIGHT);1211 1212 new_crop.top = min_t(u32, IMX274_ROUND(sel->r.top, 2, 0),1213 IMX274_MAX_HEIGHT - new_crop.height);1214 1215 sel->r = new_crop;1216 1217 if (sel->which == V4L2_SUBDEV_FORMAT_TRY)1218 tgt_crop = v4l2_subdev_state_get_crop(sd_state, 0);1219 else1220 tgt_crop = &imx274->crop;1221 1222 mutex_lock(&imx274->lock);1223 1224 size_changed = (new_crop.width != tgt_crop->width ||1225 new_crop.height != tgt_crop->height);1226 1227 /* __imx274_change_compose needs the new size in *tgt_crop */1228 *tgt_crop = new_crop;1229 1230 /* if crop size changed then reset the output image size */1231 if (size_changed)1232 __imx274_change_compose(imx274, sd_state, sel->which,1233 &new_crop.width, &new_crop.height,1234 sel->flags);1235 1236 mutex_unlock(&imx274->lock);1237 1238 return 0;1239}1240 1241static int imx274_set_selection(struct v4l2_subdev *sd,1242 struct v4l2_subdev_state *sd_state,1243 struct v4l2_subdev_selection *sel)1244{1245 struct stimx274 *imx274 = to_imx274(sd);1246 1247 if (sel->pad != 0)1248 return -EINVAL;1249 1250 if (sel->target == V4L2_SEL_TGT_CROP)1251 return imx274_set_selection_crop(imx274, sd_state, sel);1252 1253 if (sel->target == V4L2_SEL_TGT_COMPOSE) {1254 int err;1255 1256 mutex_lock(&imx274->lock);1257 err = __imx274_change_compose(imx274, sd_state, sel->which,1258 &sel->r.width, &sel->r.height,1259 sel->flags);1260 mutex_unlock(&imx274->lock);1261 1262 /*1263 * __imx274_change_compose already set width and1264 * height in set->r, we still need to set top-left1265 */1266 if (!err) {1267 sel->r.top = 0;1268 sel->r.left = 0;1269 }1270 1271 return err;1272 }1273 1274 return -EINVAL;1275}1276 1277static int imx274_apply_trimming(struct stimx274 *imx274)1278{1279 u32 h_start;1280 u32 h_end;1281 u32 hmax;1282 u32 v_cut;1283 s32 v_pos;1284 u32 write_v_size;1285 u32 y_out_size;1286 int err;1287 1288 h_start = imx274->crop.left + 12;1289 h_end = h_start + imx274->crop.width;1290 1291 /* Use the minimum allowed value of HMAX */1292 /* Note: except in mode 1, (width / 16 + 23) is always < hmax_min */1293 /* Note: 260 is the minimum HMAX in all implemented modes */1294 hmax = max_t(u32, 260, (imx274->crop.width) / 16 + 23);1295 1296 /* invert v_pos if VFLIP */1297 v_pos = imx274->ctrls.vflip->cur.val ?1298 (-imx274->crop.top / 2) : (imx274->crop.top / 2);1299 v_cut = (IMX274_MAX_HEIGHT - imx274->crop.height) / 2;1300 write_v_size = imx274->crop.height + 22;1301 y_out_size = imx274->crop.height;1302 1303 err = imx274_write_mbreg(imx274, IMX274_HMAX_REG_LSB, hmax, 2);1304 if (!err)1305 err = imx274_write_mbreg(imx274, IMX274_HTRIM_EN_REG, 1, 1);1306 if (!err)1307 err = imx274_write_mbreg(imx274, IMX274_HTRIM_START_REG_LSB,1308 h_start, 2);1309 if (!err)1310 err = imx274_write_mbreg(imx274, IMX274_HTRIM_END_REG_LSB,1311 h_end, 2);1312 if (!err)1313 err = imx274_write_mbreg(imx274, IMX274_VWIDCUTEN_REG, 1, 1);1314 if (!err)1315 err = imx274_write_mbreg(imx274, IMX274_VWIDCUT_REG_LSB,1316 v_cut, 2);1317 if (!err)1318 err = imx274_write_mbreg(imx274, IMX274_VWINPOS_REG_LSB,1319 v_pos, 2);1320 if (!err)1321 err = imx274_write_mbreg(imx274, IMX274_WRITE_VSIZE_REG_LSB,1322 write_v_size, 2);1323 if (!err)1324 err = imx274_write_mbreg(imx274, IMX274_Y_OUT_SIZE_REG_LSB,1325 y_out_size, 2);1326 1327 return err;1328}1329 1330static int imx274_get_frame_interval(struct v4l2_subdev *sd,1331 struct v4l2_subdev_state *sd_state,1332 struct v4l2_subdev_frame_interval *fi)1333{1334 struct stimx274 *imx274 = to_imx274(sd);1335 1336 /*1337 * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L21338 * subdev active state API.1339 */1340 if (fi->which != V4L2_SUBDEV_FORMAT_ACTIVE)1341 return -EINVAL;1342 1343 fi->interval = imx274->frame_interval;1344 dev_dbg(&imx274->client->dev, "%s frame rate = %d / %d\n",1345 __func__, imx274->frame_interval.numerator,1346 imx274->frame_interval.denominator);1347 1348 return 0;1349}1350 1351static int imx274_set_frame_interval(struct v4l2_subdev *sd,1352 struct v4l2_subdev_state *sd_state,1353 struct v4l2_subdev_frame_interval *fi)1354{1355 struct stimx274 *imx274 = to_imx274(sd);1356 struct v4l2_ctrl *ctrl = imx274->ctrls.exposure;1357 int min, max, def;1358 int ret;1359 1360 /*1361 * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L21362 * subdev active state API.1363 */1364 if (fi->which != V4L2_SUBDEV_FORMAT_ACTIVE)1365 return -EINVAL;1366 1367 ret = pm_runtime_resume_and_get(&imx274->client->dev);1368 if (ret < 0)1369 return ret;1370 1371 mutex_lock(&imx274->lock);1372 ret = __imx274_set_frame_interval(imx274, fi->interval);1373 1374 if (!ret) {1375 fi->interval = imx274->frame_interval;1376 1377 /*1378 * exposure time range is decided by frame interval1379 * need to update it after frame interval changes1380 */1381 min = IMX274_MIN_EXPOSURE_TIME;1382 max = fi->interval.numerator * 10000001383 / fi->interval.denominator;1384 def = max;1385 ret = __v4l2_ctrl_modify_range(ctrl, min, max, 1, def);1386 if (ret) {1387 dev_err(&imx274->client->dev,1388 "Exposure ctrl range update failed\n");1389 goto unlock;1390 }1391 1392 /* update exposure time accordingly */1393 imx274_set_exposure(imx274, ctrl->val);1394 1395 dev_dbg(&imx274->client->dev, "set frame interval to %uus\n",1396 fi->interval.numerator * 10000001397 / fi->interval.denominator);1398 }1399 1400unlock:1401 mutex_unlock(&imx274->lock);1402 pm_runtime_put(&imx274->client->dev);1403 1404 return ret;1405}1406 1407/**1408 * imx274_load_default - load default control values1409 * @priv: Pointer to device structure1410 *1411 * Return: 0 on success, errors otherwise1412 */1413static void imx274_load_default(struct stimx274 *priv)1414{1415 /* load default control values */1416 priv->frame_interval.numerator = 1;1417 priv->frame_interval.denominator = IMX274_DEF_FRAME_RATE;1418 priv->ctrls.exposure->val = 1000000 / IMX274_DEF_FRAME_RATE;1419 priv->ctrls.gain->val = IMX274_DEF_GAIN;1420 priv->ctrls.vflip->val = 0;1421 priv->ctrls.test_pattern->val = TEST_PATTERN_DISABLED;1422}1423 1424/**1425 * imx274_s_stream - It is used to start/stop the streaming.1426 * @sd: V4L2 Sub device1427 * @on: Flag (True / False)1428 *1429 * This function controls the start or stop of streaming for the1430 * imx274 sensor.1431 *1432 * Return: 0 on success, errors otherwise1433 */1434static int imx274_s_stream(struct v4l2_subdev *sd, int on)1435{1436 struct stimx274 *imx274 = to_imx274(sd);1437 int ret = 0;1438 1439 dev_dbg(&imx274->client->dev, "%s : %s, mode index = %td\n", __func__,1440 on ? "Stream Start" : "Stream Stop",1441 imx274->mode - &imx274_modes[0]);1442 1443 mutex_lock(&imx274->lock);1444 1445 if (on) {1446 ret = pm_runtime_resume_and_get(&imx274->client->dev);1447 if (ret < 0) {1448 mutex_unlock(&imx274->lock);1449 return ret;1450 }1451 1452 /* load mode registers */1453 ret = imx274_mode_regs(imx274);1454 if (ret)1455 goto fail;1456 1457 ret = imx274_apply_trimming(imx274);1458 if (ret)1459 goto fail;1460 1461 /*1462 * update frame rate & exposure. if the last mode is different,1463 * HMAX could be changed. As the result, frame rate & exposure1464 * are changed.1465 * gain is not affected.1466 */1467 ret = __imx274_set_frame_interval(imx274,1468 imx274->frame_interval);1469 if (ret)1470 goto fail;1471 1472 /* start stream */1473 ret = imx274_start_stream(imx274);1474 if (ret)1475 goto fail;1476 } else {1477 /* stop stream */1478 ret = imx274_write_table(imx274, imx274_stop);1479 if (ret)1480 goto fail;1481 1482 pm_runtime_put(&imx274->client->dev);1483 }1484 1485 mutex_unlock(&imx274->lock);1486 dev_dbg(&imx274->client->dev, "%s : Done\n", __func__);1487 return 0;1488 1489fail:1490 pm_runtime_put(&imx274->client->dev);1491 mutex_unlock(&imx274->lock);1492 dev_err(&imx274->client->dev, "s_stream failed\n");1493 return ret;1494}1495 1496/*1497 * imx274_get_frame_length - Function for obtaining current frame length1498 * @priv: Pointer to device structure1499 * @val: Pointer to obtained value1500 *1501 * frame_length = vmax x (svr + 1), in unit of hmax.1502 *1503 * Return: 0 on success1504 */1505static int imx274_get_frame_length(struct stimx274 *priv, u32 *val)1506{1507 int err;1508 u32 svr;1509 u32 vmax;1510 1511 err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2);1512 if (err)1513 goto fail;1514 1515 err = imx274_read_mbreg(priv, IMX274_VMAX_REG_3, &vmax, 3);1516 if (err)1517 goto fail;1518 1519 *val = vmax * (svr + 1);1520 1521 return 0;1522 1523fail:1524 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);1525 return err;1526}1527 1528static int imx274_clamp_coarse_time(struct stimx274 *priv, u32 *val,1529 u32 *frame_length)1530{1531 int err;1532 1533 err = imx274_get_frame_length(priv, frame_length);1534 if (err)1535 return err;1536 1537 if (*frame_length < priv->mode->min_frame_len)1538 *frame_length = priv->mode->min_frame_len;1539 1540 *val = *frame_length - *val; /* convert to raw shr */1541 if (*val > *frame_length - IMX274_SHR_LIMIT_CONST)1542 *val = *frame_length - IMX274_SHR_LIMIT_CONST;1543 else if (*val < priv->mode->min_SHR)1544 *val = priv->mode->min_SHR;1545 1546 return 0;1547}1548 1549/*1550 * imx274_set_digital gain - Function called when setting digital gain1551 * @priv: Pointer to device structure1552 * @dgain: Value of digital gain.1553 *1554 * Digital gain has only 4 steps: 1x, 2x, 4x, and 8x1555 *1556 * Return: 0 on success1557 */1558static int imx274_set_digital_gain(struct stimx274 *priv, u32 dgain)1559{1560 u8 reg_val;1561 1562 reg_val = ffs(dgain);1563 1564 if (reg_val)1565 reg_val--;1566 1567 reg_val = clamp(reg_val, (u8)0, (u8)3);1568 1569 return imx274_write_reg(priv, IMX274_DIGITAL_GAIN_REG,1570 reg_val & IMX274_MASK_LSB_4_BITS);1571}1572 1573/*1574 * imx274_set_gain - Function called when setting gain1575 * @priv: Pointer to device structure1576 * @val: Value of gain. the real value = val << IMX274_GAIN_SHIFT;1577 * @ctrl: v4l2 control pointer1578 *1579 * Set the gain based on input value.1580 * The caller should hold the mutex lock imx274->lock if necessary1581 *1582 * Return: 0 on success1583 */1584static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl)1585{1586 int err;1587 u32 gain, analog_gain, digital_gain, gain_reg;1588 1589 gain = (u32)(ctrl->val);1590 1591 dev_dbg(&priv->client->dev,1592 "%s : input gain = %d.%d\n", __func__,1593 gain >> IMX274_GAIN_SHIFT,1594 ((gain & IMX274_GAIN_SHIFT_MASK) * 100) >> IMX274_GAIN_SHIFT);1595 1596 if (gain > IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN)1597 gain = IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN;1598 else if (gain < IMX274_MIN_GAIN)1599 gain = IMX274_MIN_GAIN;1600 1601 if (gain <= IMX274_MAX_ANALOG_GAIN)1602 digital_gain = 1;1603 else if (gain <= IMX274_MAX_ANALOG_GAIN * 2)1604 digital_gain = 2;1605 else if (gain <= IMX274_MAX_ANALOG_GAIN * 4)1606 digital_gain = 4;1607 else1608 digital_gain = IMX274_MAX_DIGITAL_GAIN;1609 1610 analog_gain = gain / digital_gain;1611 1612 dev_dbg(&priv->client->dev,1613 "%s : digital gain = %d, analog gain = %d.%d\n",1614 __func__, digital_gain, analog_gain >> IMX274_GAIN_SHIFT,1615 ((analog_gain & IMX274_GAIN_SHIFT_MASK) * 100)1616 >> IMX274_GAIN_SHIFT);1617 1618 err = imx274_set_digital_gain(priv, digital_gain);1619 if (err)1620 goto fail;1621 1622 /* convert to register value, refer to imx274 datasheet */1623 gain_reg = (u32)IMX274_GAIN_CONST -1624 (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) / analog_gain;1625 if (gain_reg > IMX274_GAIN_REG_MAX)1626 gain_reg = IMX274_GAIN_REG_MAX;1627 1628 err = imx274_write_mbreg(priv, IMX274_ANALOG_GAIN_ADDR_LSB, gain_reg,1629 2);1630 if (err)1631 goto fail;1632 1633 if (IMX274_GAIN_CONST - gain_reg == 0) {1634 err = -EINVAL;1635 goto fail;1636 }1637 1638 /* convert register value back to gain value */1639 ctrl->val = (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT)1640 / (IMX274_GAIN_CONST - gain_reg) * digital_gain;1641 1642 dev_dbg(&priv->client->dev,1643 "%s : GAIN control success, gain_reg = %d, new gain = %d\n",1644 __func__, gain_reg, ctrl->val);1645 1646 return 0;1647 1648fail:1649 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);1650 return err;1651}1652 1653/*1654 * imx274_set_coarse_time - Function called when setting SHR value1655 * @priv: Pointer to device structure1656 * @val: Value for exposure time in number of line_length, or [HMAX]1657 *1658 * Set SHR value based on input value.1659 *1660 * Return: 0 on success1661 */1662static int imx274_set_coarse_time(struct stimx274 *priv, u32 *val)1663{1664 int err;1665 u32 coarse_time, frame_length;1666 1667 coarse_time = *val;1668 1669 /* convert exposure_time to appropriate SHR value */1670 err = imx274_clamp_coarse_time(priv, &coarse_time, &frame_length);1671 if (err)1672 goto fail;1673 1674 err = imx274_write_mbreg(priv, IMX274_SHR_REG_LSB, coarse_time, 2);1675 if (err)1676 goto fail;1677 1678 *val = frame_length - coarse_time;1679 return 0;1680 1681fail:1682 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);1683 return err;1684}1685 1686/*1687 * imx274_set_exposure - Function called when setting exposure time1688 * @priv: Pointer to device structure1689 * @val: Variable for exposure time, in the unit of micro-second1690 *1691 * Set exposure time based on input value.1692 * The caller should hold the mutex lock imx274->lock if necessary1693 *1694 * Return: 0 on success1695 */1696static int imx274_set_exposure(struct stimx274 *priv, int val)1697{1698 int err;1699 u32 hmax;1700 u32 coarse_time; /* exposure time in unit of line (HMAX)*/1701 1702 dev_dbg(&priv->client->dev,1703 "%s : EXPOSURE control input = %d\n", __func__, val);1704 1705 /* step 1: convert input exposure_time (val) into number of 1[HMAX] */1706 1707 err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2);1708 if (err)1709 goto fail;1710 1711 if (hmax == 0) {1712 err = -EINVAL;1713 goto fail;1714 }1715 1716 coarse_time = (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2 * val1717 - priv->mode->nocpiop) / hmax;1718 1719 /* step 2: convert exposure_time into SHR value */1720 1721 /* set SHR */1722 err = imx274_set_coarse_time(priv, &coarse_time);1723 if (err)1724 goto fail;1725 1726 priv->ctrls.exposure->val =1727 (coarse_time * hmax + priv->mode->nocpiop)1728 / (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2);1729 1730 dev_dbg(&priv->client->dev,1731 "%s : EXPOSURE control success\n", __func__);1732 return 0;1733 1734fail:1735 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);1736 1737 return err;1738}1739 1740/*1741 * imx274_set_vflip - Function called when setting vertical flip1742 * @priv: Pointer to device structure1743 * @val: Value for vflip setting1744 *1745 * Set vertical flip based on input value.1746 * val = 0: normal, no vertical flip1747 * val = 1: vertical flip enabled1748 * The caller should hold the mutex lock imx274->lock if necessary1749 *1750 * Return: 0 on success1751 */1752static int imx274_set_vflip(struct stimx274 *priv, int val)1753{1754 int err;1755 1756 err = imx274_write_reg(priv, IMX274_VFLIP_REG, val);1757 if (err) {1758 dev_err(&priv->client->dev, "VFLIP control error\n");1759 return err;1760 }1761 1762 dev_dbg(&priv->client->dev,1763 "%s : VFLIP control success\n", __func__);1764 1765 return 0;1766}1767 1768/*1769 * imx274_set_test_pattern - Function called when setting test pattern1770 * @priv: Pointer to device structure1771 * @val: Variable for test pattern1772 *1773 * Set to different test patterns based on input value.1774 *1775 * Return: 0 on success1776 */1777static int imx274_set_test_pattern(struct stimx274 *priv, int val)1778{1779 int err = 0;1780 1781 if (val == TEST_PATTERN_DISABLED) {1782 err = imx274_write_table(priv, imx274_tp_disabled);1783 } else if (val <= TEST_PATTERN_V_COLOR_BARS) {1784 err = imx274_write_reg(priv, IMX274_TEST_PATTERN_REG, val - 1);1785 if (!err)1786 err = imx274_write_table(priv, imx274_tp_regs);1787 } else {1788 err = -EINVAL;1789 }1790 1791 if (!err)1792 dev_dbg(&priv->client->dev,1793 "%s : TEST PATTERN control success\n", __func__);1794 else1795 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);1796 1797 return err;1798}1799 1800/*1801 * imx274_set_frame_length - Function called when setting frame length1802 * @priv: Pointer to device structure1803 * @val: Variable for frame length (= VMAX, i.e. vertical drive period length)1804 *1805 * Set frame length based on input value.1806 *1807 * Return: 0 on success1808 */1809static int imx274_set_frame_length(struct stimx274 *priv, u32 val)1810{1811 int err;1812 u32 frame_length;1813 1814 dev_dbg(&priv->client->dev, "%s : input length = %d\n",1815 __func__, val);1816 1817 frame_length = (u32)val;1818 1819 err = imx274_write_mbreg(priv, IMX274_VMAX_REG_3, frame_length, 3);1820 if (err)1821 goto fail;1822 1823 return 0;1824 1825fail:1826 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);1827 return err;1828}1829 1830/*1831 * __imx274_set_frame_interval - Function called when setting frame interval1832 * @priv: Pointer to device structure1833 * @frame_interval: Variable for frame interval1834 *1835 * Change frame interval by updating VMAX value1836 * The caller should hold the mutex lock imx274->lock if necessary1837 *1838 * Return: 0 on success1839 */1840static int __imx274_set_frame_interval(struct stimx274 *priv,1841 struct v4l2_fract frame_interval)1842{1843 int err;1844 u32 frame_length, req_frame_rate;1845 u32 svr;1846 u32 hmax;1847 1848 dev_dbg(&priv->client->dev, "%s: input frame interval = %d / %d",1849 __func__, frame_interval.numerator,1850 frame_interval.denominator);1851 1852 if (frame_interval.numerator == 0 || frame_interval.denominator == 0) {1853 frame_interval.denominator = IMX274_DEF_FRAME_RATE;1854 frame_interval.numerator = 1;1855 }1856 1857 req_frame_rate = (u32)(frame_interval.denominator1858 / frame_interval.numerator);1859 1860 /* boundary check */1861 if (req_frame_rate > priv->mode->max_fps) {1862 frame_interval.numerator = 1;1863 frame_interval.denominator = priv->mode->max_fps;1864 } else if (req_frame_rate < IMX274_MIN_FRAME_RATE) {1865 frame_interval.numerator = 1;1866 frame_interval.denominator = IMX274_MIN_FRAME_RATE;1867 }1868 1869 /*1870 * VMAX = 1/frame_rate x 72M / (SVR+1) / HMAX1871 * frame_length (i.e. VMAX) = (frame_interval) x 72M /(SVR+1) / HMAX1872 */1873 1874 err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2);1875 if (err)1876 goto fail;1877 1878 dev_dbg(&priv->client->dev,1879 "%s : register SVR = %d\n", __func__, svr);1880 1881 err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2);1882 if (err)1883 goto fail;1884 1885 dev_dbg(&priv->client->dev,1886 "%s : register HMAX = %d\n", __func__, hmax);1887 1888 if (hmax == 0 || frame_interval.denominator == 0) {1889 err = -EINVAL;1890 goto fail;1891 }1892 1893 frame_length = IMX274_PIXCLK_CONST1 / (svr + 1) / hmax1894 * frame_interval.numerator1895 / frame_interval.denominator;1896 1897 err = imx274_set_frame_length(priv, frame_length);1898 if (err)1899 goto fail;1900 1901 priv->frame_interval = frame_interval;1902 return 0;1903 1904fail:1905 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);1906 return err;1907}1908 1909static int imx274_enum_mbus_code(struct v4l2_subdev *sd,1910 struct v4l2_subdev_state *sd_state,1911 struct v4l2_subdev_mbus_code_enum *code)1912{1913 if (code->index > 0)1914 return -EINVAL;1915 1916 /* only supported format in the driver is Raw 10 bits SRGGB */1917 code->code = MEDIA_BUS_FMT_SRGGB10_1X10;1918 1919 return 0;1920}1921 1922static const struct v4l2_subdev_pad_ops imx274_pad_ops = {1923 .enum_mbus_code = imx274_enum_mbus_code,1924 .get_fmt = imx274_get_fmt,1925 .set_fmt = imx274_set_fmt,1926 .get_selection = imx274_get_selection,1927 .set_selection = imx274_set_selection,1928 .get_frame_interval = imx274_get_frame_interval,1929 .set_frame_interval = imx274_set_frame_interval,1930};1931 1932static const struct v4l2_subdev_video_ops imx274_video_ops = {1933 .s_stream = imx274_s_stream,1934};1935 1936static const struct v4l2_subdev_ops imx274_subdev_ops = {1937 .pad = &imx274_pad_ops,1938 .video = &imx274_video_ops,1939};1940 1941static const struct v4l2_ctrl_ops imx274_ctrl_ops = {1942 .s_ctrl = imx274_s_ctrl,1943};1944 1945static const struct of_device_id imx274_of_id_table[] = {1946 { .compatible = "sony,imx274" },1947 { }1948};1949MODULE_DEVICE_TABLE(of, imx274_of_id_table);1950 1951static const struct i2c_device_id imx274_id[] = {1952 { "IMX274" },1953 { }1954};1955MODULE_DEVICE_TABLE(i2c, imx274_id);1956 1957static int imx274_fwnode_parse(struct device *dev)1958{1959 struct fwnode_handle *endpoint;1960 /* Only CSI2 is supported */1961 struct v4l2_fwnode_endpoint ep = {1962 .bus_type = V4L2_MBUS_CSI2_DPHY1963 };1964 int ret;1965 1966 endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);1967 if (!endpoint) {1968 dev_err(dev, "Endpoint node not found\n");1969 return -EINVAL;1970 }1971 1972 ret = v4l2_fwnode_endpoint_parse(endpoint, &ep);1973 fwnode_handle_put(endpoint);1974 if (ret == -ENXIO) {1975 dev_err(dev, "Unsupported bus type, should be CSI2\n");1976 return ret;1977 } else if (ret) {1978 dev_err(dev, "Parsing endpoint node failed %d\n", ret);1979 return ret;1980 }1981 1982 /* Check number of data lanes, only 4 lanes supported */1983 if (ep.bus.mipi_csi2.num_data_lanes != 4) {1984 dev_err(dev, "Invalid data lanes: %d\n",1985 ep.bus.mipi_csi2.num_data_lanes);1986 return -EINVAL;1987 }1988 1989 return 0;1990}1991 1992static int imx274_probe(struct i2c_client *client)1993{1994 struct v4l2_subdev *sd;1995 struct stimx274 *imx274;1996 struct device *dev = &client->dev;1997 int ret;1998 1999 /* initialize imx274 */2000 imx274 = devm_kzalloc(dev, sizeof(*imx274), GFP_KERNEL);2001 if (!imx274)2002 return -ENOMEM;2003 2004 mutex_init(&imx274->lock);2005 2006 ret = imx274_fwnode_parse(dev);2007 if (ret)2008 return ret;2009 2010 imx274->inck = devm_clk_get_optional(dev, "inck");2011 if (IS_ERR(imx274->inck))2012 return PTR_ERR(imx274->inck);2013 2014 ret = imx274_regulators_get(dev, imx274);2015 if (ret) {2016 dev_err(dev, "Failed to get power regulators, err: %d\n", ret);2017 return ret;2018 }2019 2020 /* initialize format */2021 imx274->mode = &imx274_modes[0];2022 imx274->crop.width = IMX274_MAX_WIDTH;2023 imx274->crop.height = IMX274_MAX_HEIGHT;2024 imx274->format.width = imx274->crop.width / imx274->mode->wbin_ratio;2025 imx274->format.height = imx274->crop.height / imx274->mode->hbin_ratio;2026 imx274->format.field = V4L2_FIELD_NONE;2027 imx274->format.code = MEDIA_BUS_FMT_SRGGB10_1X10;2028 imx274->format.colorspace = V4L2_COLORSPACE_SRGB;2029 imx274->frame_interval.numerator = 1;2030 imx274->frame_interval.denominator = IMX274_DEF_FRAME_RATE;2031 2032 /* initialize regmap */2033 imx274->regmap = devm_regmap_init_i2c(client, &imx274_regmap_config);2034 if (IS_ERR(imx274->regmap)) {2035 dev_err(dev,2036 "regmap init failed: %ld\n", PTR_ERR(imx274->regmap));2037 ret = -ENODEV;2038 goto err_regmap;2039 }2040 2041 /* initialize subdevice */2042 imx274->client = client;2043 sd = &imx274->sd;2044 v4l2_i2c_subdev_init(sd, client, &imx274_subdev_ops);2045 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;2046 2047 /* initialize subdev media pad */2048 imx274->pad.flags = MEDIA_PAD_FL_SOURCE;2049 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;2050 ret = media_entity_pads_init(&sd->entity, 1, &imx274->pad);2051 if (ret < 0) {2052 dev_err(dev,2053 "%s : media entity init Failed %d\n", __func__, ret);2054 goto err_regmap;2055 }2056 2057 /* initialize sensor reset gpio */2058 imx274->reset_gpio = devm_gpiod_get_optional(dev, "reset",2059 GPIOD_OUT_HIGH);2060 if (IS_ERR(imx274->reset_gpio)) {2061 ret = dev_err_probe(dev, PTR_ERR(imx274->reset_gpio),2062 "Reset GPIO not setup in DT\n");2063 goto err_me;2064 }2065 2066 /* power on the sensor */2067 ret = imx274_power_on(dev);2068 if (ret < 0) {2069 dev_err(dev, "%s : imx274 power on failed\n", __func__);2070 goto err_me;2071 }2072 2073 /* initialize controls */2074 ret = v4l2_ctrl_handler_init(&imx274->ctrls.handler, 4);2075 if (ret < 0) {2076 dev_err(dev, "%s : ctrl handler init Failed\n", __func__);2077 goto err_power_off;2078 }2079 2080 imx274->ctrls.handler.lock = &imx274->lock;2081 2082 /* add new controls */2083 imx274->ctrls.test_pattern = v4l2_ctrl_new_std_menu_items(2084 &imx274->ctrls.handler, &imx274_ctrl_ops,2085 V4L2_CID_TEST_PATTERN,2086 ARRAY_SIZE(tp_qmenu) - 1, 0, 0, tp_qmenu);2087 2088 imx274->ctrls.gain = v4l2_ctrl_new_std(2089 &imx274->ctrls.handler,2090 &imx274_ctrl_ops,2091 V4L2_CID_GAIN, IMX274_MIN_GAIN,2092 IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN, 1,2093 IMX274_DEF_GAIN);2094 2095 imx274->ctrls.exposure = v4l2_ctrl_new_std(2096 &imx274->ctrls.handler,2097 &imx274_ctrl_ops,2098 V4L2_CID_EXPOSURE, IMX274_MIN_EXPOSURE_TIME,2099 1000000 / IMX274_DEF_FRAME_RATE, 1,2100 IMX274_MIN_EXPOSURE_TIME);2101 2102 imx274->ctrls.vflip = v4l2_ctrl_new_std(2103 &imx274->ctrls.handler,2104 &imx274_ctrl_ops,2105 V4L2_CID_VFLIP, 0, 1, 1, 0);2106 2107 imx274->sd.ctrl_handler = &imx274->ctrls.handler;2108 if (imx274->ctrls.handler.error) {2109 ret = imx274->ctrls.handler.error;2110 goto err_ctrls;2111 }2112 2113 /* load default control values */2114 imx274_load_default(imx274);2115 2116 /* register subdevice */2117 ret = v4l2_async_register_subdev(sd);2118 if (ret < 0) {2119 dev_err(dev, "%s : v4l2_async_register_subdev failed %d\n",2120 __func__, ret);2121 goto err_ctrls;2122 }2123 2124 pm_runtime_set_active(dev);2125 pm_runtime_enable(dev);2126 pm_runtime_idle(dev);2127 2128 dev_info(dev, "imx274 : imx274 probe success !\n");2129 return 0;2130 2131err_ctrls:2132 v4l2_ctrl_handler_free(&imx274->ctrls.handler);2133err_power_off:2134 imx274_power_off(dev);2135err_me:2136 media_entity_cleanup(&sd->entity);2137err_regmap:2138 mutex_destroy(&imx274->lock);2139 return ret;2140}2141 2142static void imx274_remove(struct i2c_client *client)2143{2144 struct v4l2_subdev *sd = i2c_get_clientdata(client);2145 struct stimx274 *imx274 = to_imx274(sd);2146 2147 pm_runtime_disable(&client->dev);2148 if (!pm_runtime_status_suspended(&client->dev))2149 imx274_power_off(&client->dev);2150 pm_runtime_set_suspended(&client->dev);2151 2152 v4l2_async_unregister_subdev(sd);2153 v4l2_ctrl_handler_free(&imx274->ctrls.handler);2154 2155 media_entity_cleanup(&sd->entity);2156 mutex_destroy(&imx274->lock);2157}2158 2159static const struct dev_pm_ops imx274_pm_ops = {2160 SET_RUNTIME_PM_OPS(imx274_power_off, imx274_power_on, NULL)2161};2162 2163static struct i2c_driver imx274_i2c_driver = {2164 .driver = {2165 .name = DRIVER_NAME,2166 .pm = &imx274_pm_ops,2167 .of_match_table = imx274_of_id_table,2168 },2169 .probe = imx274_probe,2170 .remove = imx274_remove,2171 .id_table = imx274_id,2172};2173 2174module_i2c_driver(imx274_i2c_driver);2175 2176MODULE_AUTHOR("Leon Luo <leonl@leopardimaging.com>");2177MODULE_DESCRIPTION("IMX274 CMOS Image Sensor driver");2178MODULE_LICENSE("GPL v2");2179