// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 Intel Corporation

#include <asm/unaligned.h>
#include <linux/acpi.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fwnode.h>

#define IMX355_REG_MODE_SELECT		0x0100
#define IMX355_MODE_STANDBY		0x00
#define IMX355_MODE_STREAMING		0x01

/* Chip ID */
#define IMX355_REG_CHIP_ID		0x0016
#define IMX355_CHIP_ID			0x0355

/* V_TIMING internal */
#define IMX355_REG_FLL			0x0340
#define IMX355_FLL_MAX			0xffff

/* Exposure control */
#define IMX355_REG_EXPOSURE		0x0202
#define IMX355_EXPOSURE_MIN		1
#define IMX355_EXPOSURE_STEP		1
#define IMX355_EXPOSURE_DEFAULT		0x0282

/* Analog gain control */
#define IMX355_REG_ANALOG_GAIN		0x0204
#define IMX355_ANA_GAIN_MIN		0
#define IMX355_ANA_GAIN_MAX		960
#define IMX355_ANA_GAIN_STEP		1
#define IMX355_ANA_GAIN_DEFAULT		0

/* Digital gain control */
#define IMX355_REG_DPGA_USE_GLOBAL_GAIN	0x3070
#define IMX355_REG_DIG_GAIN_GLOBAL	0x020e
#define IMX355_DGTL_GAIN_MIN		256
#define IMX355_DGTL_GAIN_MAX		4095
#define IMX355_DGTL_GAIN_STEP		1
#define IMX355_DGTL_GAIN_DEFAULT	256

/* Test Pattern Control */
#define IMX355_REG_TEST_PATTERN		0x0600
#define IMX355_TEST_PATTERN_DISABLED		0
#define IMX355_TEST_PATTERN_SOLID_COLOR		1
#define IMX355_TEST_PATTERN_COLOR_BARS		2
#define IMX355_TEST_PATTERN_GRAY_COLOR_BARS	3
#define IMX355_TEST_PATTERN_PN9			4

/* Flip Control */
#define IMX355_REG_ORIENTATION		0x0101

/* default link frequency and external clock */
#define IMX355_LINK_FREQ_DEFAULT	360000000
#define IMX355_EXT_CLK			19200000
#define IMX355_LINK_FREQ_INDEX		0

struct imx355_reg {
	u16 address;
	u8 val;
};

struct imx355_reg_list {
	u32 num_of_regs;
	const struct imx355_reg *regs;
};

/* Mode : resolution and related config&values */
struct imx355_mode {
	/* Frame width */
	u32 width;
	/* Frame height */
	u32 height;

	/* V-timing */
	u32 fll_def;
	u32 fll_min;

	/* H-timing */
	u32 llp;

	/* index of link frequency */
	u32 link_freq_index;

	/* Default register values */
	struct imx355_reg_list reg_list;
};

struct imx355_hwcfg {
	u32 ext_clk;			/* sensor external clk */
	s64 *link_freqs;		/* CSI-2 link frequencies */
	unsigned int nr_of_link_freqs;
};

struct imx355 {
	struct v4l2_subdev sd;
	struct media_pad pad;

	struct v4l2_ctrl_handler ctrl_handler;
	/* V4L2 Controls */
	struct v4l2_ctrl *link_freq;
	struct v4l2_ctrl *pixel_rate;
	struct v4l2_ctrl *vblank;
	struct v4l2_ctrl *hblank;
	struct v4l2_ctrl *exposure;
	struct v4l2_ctrl *vflip;
	struct v4l2_ctrl *hflip;

	/* Current mode */
	const struct imx355_mode *cur_mode;

	struct imx355_hwcfg *hwcfg;
	s64 link_def_freq;	/* CSI-2 link default frequency */

	/*
	 * Mutex for serialized access:
	 * Protect sensor set pad format and start/stop streaming safely.
	 * Protect access to sensor v4l2 controls.
	 */
	struct mutex mutex;

	/* Streaming on/off */
	bool streaming;
};

static const struct imx355_reg imx355_global_regs[] = {
	{ 0x0136, 0x13 },
	{ 0x0137, 0x33 },
	{ 0x304e, 0x03 },
	{ 0x4348, 0x16 },
	{ 0x4350, 0x19 },
	{ 0x4408, 0x0a },
	{ 0x440c, 0x0b },
	{ 0x4411, 0x5f },
	{ 0x4412, 0x2c },
	{ 0x4623, 0x00 },
	{ 0x462c, 0x0f },
	{ 0x462d, 0x00 },
	{ 0x462e, 0x00 },
	{ 0x4684, 0x54 },
	{ 0x480a, 0x07 },
	{ 0x4908, 0x07 },
	{ 0x4909, 0x07 },
	{ 0x490d, 0x0a },
	{ 0x491e, 0x0f },
	{ 0x4921, 0x06 },
	{ 0x4923, 0x28 },
	{ 0x4924, 0x28 },
	{ 0x4925, 0x29 },
	{ 0x4926, 0x29 },
	{ 0x4927, 0x1f },
	{ 0x4928, 0x20 },
	{ 0x4929, 0x20 },
	{ 0x492a, 0x20 },
	{ 0x492c, 0x05 },
	{ 0x492d, 0x06 },
	{ 0x492e, 0x06 },
	{ 0x492f, 0x06 },
	{ 0x4930, 0x03 },
	{ 0x4931, 0x04 },
	{ 0x4932, 0x04 },
	{ 0x4933, 0x05 },
	{ 0x595e, 0x01 },
	{ 0x5963, 0x01 },
	{ 0x3030, 0x01 },
	{ 0x3031, 0x01 },
	{ 0x3045, 0x01 },
	{ 0x4010, 0x00 },
	{ 0x4011, 0x00 },
	{ 0x4012, 0x00 },
	{ 0x4013, 0x01 },
	{ 0x68a8, 0xfe },
	{ 0x68a9, 0xff },
	{ 0x6888, 0x00 },
	{ 0x6889, 0x00 },
	{ 0x68b0, 0x00 },
	{ 0x3058, 0x00 },
	{ 0x305a, 0x00 },
};

static const struct imx355_reg_list imx355_global_setting = {
	.num_of_regs = ARRAY_SIZE(imx355_global_regs),
	.regs = imx355_global_regs,
};

static const struct imx355_reg mode_3268x2448_regs[] = {
	{ 0x0112, 0x0a },
	{ 0x0113, 0x0a },
	{ 0x0114, 0x03 },
	{ 0x0342, 0x0e },
	{ 0x0343, 0x58 },
	{ 0x0340, 0x0a },
	{ 0x0341, 0x37 },
	{ 0x0344, 0x00 },
	{ 0x0345, 0x08 },
	{ 0x0346, 0x00 },
	{ 0x0347, 0x08 },
	{ 0x0348, 0x0c },
	{ 0x0349, 0xcb },
	{ 0x034a, 0x09 },
	{ 0x034b, 0x97 },
	{ 0x0220, 0x00 },
	{ 0x0222, 0x01 },
	{ 0x0900, 0x00 },
	{ 0x0901, 0x11 },
	{ 0x0902, 0x00 },
	{ 0x034c, 0x0c },
	{ 0x034d, 0xc4 },
	{ 0x034e, 0x09 },
	{ 0x034f, 0x90 },
	{ 0x0301, 0x05 },
	{ 0x0303, 0x01 },
	{ 0x0305, 0x02 },
	{ 0x0306, 0x00 },
	{ 0x0307, 0x78 },
	{ 0x030b, 0x01 },
	{ 0x030d, 0x02 },
	{ 0x030e, 0x00 },
	{ 0x030f, 0x4b },
	{ 0x0310, 0x00 },
	{ 0x0700, 0x00 },
	{ 0x0701, 0x10 },
	{ 0x0820, 0x0b },
	{ 0x0821, 0x40 },
	{ 0x3088, 0x04 },
	{ 0x6813, 0x02 },
	{ 0x6835, 0x07 },
	{ 0x6836, 0x01 },
	{ 0x6837, 0x04 },
	{ 0x684d, 0x07 },
	{ 0x684e, 0x01 },
	{ 0x684f, 0x04 },
};

static const struct imx355_reg mode_3264x2448_regs[] = {
	{ 0x0112, 0x0a },
	{ 0x0113, 0x0a },
	{ 0x0114, 0x03 },
	{ 0x0342, 0x0e },
	{ 0x0343, 0x58 },
	{ 0x0340, 0x0a },
	{ 0x0341, 0x37 },
	{ 0x0344, 0x00 },
	{ 0x0345, 0x08 },
	{ 0x0346, 0x00 },
	{ 0x0347, 0x08 },
	{ 0x0348, 0x0c },
	{ 0x0349, 0xc7 },
	{ 0x034a, 0x09 },
	{ 0x034b, 0x97 },
	{ 0x0220, 0x00 },
	{ 0x0222, 0x01 },
	{ 0x0900, 0x00 },
	{ 0x0901, 0x11 },
	{ 0x0902, 0x00 },
	{ 0x034c, 0x0c },
	{ 0x034d, 0xc0 },
	{ 0x034e, 0x09 },
	{ 0x034f, 0x90 },
	{ 0x0301, 0x05 },
	{ 0x0303, 0x01 },
	{ 0x0305, 0x02 },
	{ 0x0306, 0x00 },
	{ 0x0307, 0x78 },
	{ 0x030b, 0x01 },
	{ 0x030d, 0x02 },
	{ 0x030e, 0x00 },
	{ 0x030f, 0x4b },
	{ 0x0310, 0x00 },
	{ 0x0700, 0x00 },
	{ 0x0701, 0x10 },
	{ 0x0820, 0x0b },
	{ 0x0821, 0x40 },
	{ 0x3088, 0x04 },
	{ 0x6813, 0x02 },
	{ 0x6835, 0x07 },
	{ 0x6836, 0x01 },
	{ 0x6837, 0x04 },
	{ 0x684d, 0x07 },
	{ 0x684e, 0x01 },
	{ 0x684f, 0x04 },
};

static const struct imx355_reg mode_3280x2464_regs[] = {
	{ 0x0112, 0x0a },
	{ 0x0113, 0x0a },
	{ 0x0114, 0x03 },
	{ 0x0342, 0x0e },
	{ 0x0343, 0x58 },
	{ 0x0340, 0x0a },
	{ 0x0341, 0x37 },
	{ 0x0344, 0x00 },
	{ 0x0345, 0x00 },
	{ 0x0346, 0x00 },
	{ 0x0347, 0x00 },
	{ 0x0348, 0x0c },
	{ 0x0349, 0xcf },
	{ 0x034a, 0x09 },
	{ 0x034b, 0x9f },
	{ 0x0220, 0x00 },
	{ 0x0222, 0x01 },
	{ 0x0900, 0x00 },
	{ 0x0901, 0x11 },
	{ 0x0902, 0x00 },
	{ 0x034c, 0x0c },
	{ 0x034d, 0xd0 },
	{ 0x034e, 0x09 },
	{ 0x034f, 0xa0 },
	{ 0x0301, 0x05 },
	{ 0x0303, 0x01 },
	{ 0x0305, 0x02 },
	{ 0x0306, 0x00 },
	{ 0x0307, 0x78 },
	{ 0x030b, 0x01 },
	{ 0x030d, 0x02 },
	{ 0x030e, 0x00 },
	{ 0x030f, 0x4b },
	{ 0x0310, 0x00 },
	{ 0x0700, 0x00 },
	{ 0x0701, 0x10 },
	{ 0x0820, 0x0b },
	{ 0x0821, 0x40 },
	{ 0x3088, 0x04 },
	{ 0x6813, 0x02 },
	{ 0x6835, 0x07 },
	{ 0x6836, 0x01 },
	{ 0x6837, 0x04 },
	{ 0x684d, 0x07 },
	{ 0x684e, 0x01 },
	{ 0x684f, 0x04 },
};

static const struct imx355_reg mode_1940x1096_regs[] = {
	{ 0x0112, 0x0a },
	{ 0x0113, 0x0a },
	{ 0x0114, 0x03 },
	{ 0x0342, 0x0e },
	{ 0x0343, 0x58 },
	{ 0x0340, 0x05 },
	{ 0x0341, 0x1a },
	{ 0x0344, 0x02 },
	{ 0x0345, 0xa0 },
	{ 0x0346, 0x02 },
	{ 0x0347, 0xac },
	{ 0x0348, 0x0a },
	{ 0x0349, 0x33 },
	{ 0x034a, 0x06 },
	{ 0x034b, 0xf3 },
	{ 0x0220, 0x00 },
	{ 0x0222, 0x01 },
	{ 0x0900, 0x00 },
	{ 0x0901, 0x11 },
	{ 0x0902, 0x00 },
	{ 0x034c, 0x07 },
	{ 0x034d, 0x94 },
	{ 0x034e, 0x04 },
	{ 0x034f, 0x48 },
	{ 0x0301, 0x05 },
	{ 0x0303, 0x01 },
	{ 0x0305, 0x02 },
	{ 0x0306, 0x00 },
	{ 0x0307, 0x78 },
	{ 0x030b, 0x01 },
	{ 0x030d, 0x02 },
	{ 0x030e, 0x00 },
	{ 0x030f, 0x4b },
	{ 0x0310, 0x00 },
	{ 0x0700, 0x00 },
	{ 0x0701, 0x10 },
	{ 0x0820, 0x0b },
	{ 0x0821, 0x40 },
	{ 0x3088, 0x04 },
	{ 0x6813, 0x02 },
	{ 0x6835, 0x07 },
	{ 0x6836, 0x01 },
	{ 0x6837, 0x04 },
	{ 0x684d, 0x07 },
	{ 0x684e, 0x01 },
	{ 0x684f, 0x04 },
};

static const struct imx355_reg mode_1936x1096_regs[] = {
	{ 0x0112, 0x0a },
	{ 0x0113, 0x0a },
	{ 0x0114, 0x03 },
	{ 0x0342, 0x0e },
	{ 0x0343, 0x58 },
	{ 0x0340, 0x05 },
	{ 0x0341, 0x1a },
	{ 0x0344, 0x02 },
	{ 0x0345, 0xa0 },
	{ 0x0346, 0x02 },
	{ 0x0347, 0xac },
	{ 0x0348, 0x0a },
	{ 0x0349, 0x2f },
	{ 0x034a, 0x06 },
	{ 0x034b, 0xf3 },
	{ 0x0220, 0x00 },
	{ 0x0222, 0x01 },
	{ 0x0900, 0x00 },
	{ 0x0901, 0x11 },
	{ 0x0902, 0x00 },
	{ 0x034c, 0x07 },
	{ 0x034d, 0x90 },
	{ 0x034e, 0x04 },
	{ 0x034f, 0x48 },
	{ 0x0301, 0x05 },
	{ 0x0303, 0x01 },
	{ 0x0305, 0x02 },
	{ 0x0306, 0x00 },
	{ 0x0307, 0x78 },
	{ 0x030b, 0x01 },
	{ 0x030d, 0x02 },
	{ 0x030e, 0x00 },
	{ 0x030f, 0x4b },
	{ 0x0310, 0x00 },
	{ 0x0700, 0x00 },
	{ 0x0701, 0x10 },
	{ 0x0820, 0x0b },
	{ 0x0821, 0x40 },
	{ 0x3088, 0x04 },
	{ 0x6813, 0x02 },
	{ 0x6835, 0x07 },
	{ 0x6836, 0x01 },
	{ 0x6837, 0x04 },
	{ 0x684d, 0x07 },
	{ 0x684e, 0x01 },
	{ 0x684f, 0x04 },
};

static const struct imx355_reg mode_1924x1080_regs[] = {
	{ 0x0112, 0x0a },
	{ 0x0113, 0x0a },
	{ 0x0114, 0x03 },
	{ 0x0342, 0x0e },
	{ 0x0343, 0x58 },
	{ 0x0340, 0x05 },
	{ 0x0341, 0x1a },
	{ 0x0344, 0x02 },
	{ 0x0345, 0xa8 },
	{ 0x0346, 0x02 },
	{ 0x0347, 0xb4 },
	{ 0x0348, 0x0a },
	{ 0x0349, 0x2b },
	{ 0x034a, 0x06 },
	{ 0x034b, 0xeb },
	{ 0x0220, 0x00 },
	{ 0x0222, 0x01 },
	{ 0x0900, 0x00 },
	{ 0x0901, 0x11 },
	{ 0x0902, 0x00 },
	{ 0x034c, 0x07 },
	{ 0x034d, 0x84 },
	{ 0x034e, 0x04 },
	{ 0x034f, 0x38 },
	{ 0x0301, 0x05 },
	{ 0x0303, 0x01 },
	{ 0x0305, 0x02 },
	{ 0x0306, 0x00 },
	{ 0x0307, 0x78 },
	{ 0x030b, 0x01 },
	{ 0x030d, 0x02 },
	{ 0x030e, 0x00 },
	{ 0x030f, 0x4b },
	{ 0x0310, 0x00 },
	{ 0x0700, 0x00 },
	{ 0x0701, 0x10 },
	{ 0x0820, 0x0b },
	{ 0x0821, 0x40 },
	{ 0x3088, 0x04 },
	{ 0x6813, 0x02 },
	{ 0x6835, 0x07 },
	{ 0x6836, 0x01 },
	{ 0x6837, 0x04 },
	{ 0x684d, 0x07 },
	{ 0x684e, 0x01 },
	{ 0x684f, 0x04 },
};

static const struct imx355_reg mode_1920x1080_regs[] = {
	{ 0x0112, 0x0a },
	{ 0x0113, 0x0a },
	{ 0x0114, 0x03 },
	{ 0x0342, 0x0e },
	{ 0x0343, 0x58 },
	{ 0x0340, 0x05 },
	{ 0x0341, 0x1a },
	{ 0x0344, 0x02 },
	{ 0x0345, 0xa8 },
	{ 0x0346, 0x02 },
	{ 0x0347, 0xb4 },
	{ 0x0348, 0x0a },
	{ 0x0349, 0x27 },
	{ 0x034a, 0x06 },
	{ 0x034b, 0xeb },
	{ 0x0220, 0x00 },
	{ 0x0222, 0x01 },
	{ 0x0900, 0x00 },
	{ 0x0901, 0x11 },
	{ 0x0902, 0x00 },
	{ 0x034c, 0x07 },
	{ 0x034d, 0x80 },
	{ 0x034e, 0x04 },
	{ 0x034f, 0x38 },
	{ 0x0301, 0x05 },
	{ 0x0303, 0x01 },
	{ 0x0305, 0x02 },
	{ 0x0306, 0x00 },
	{ 0x0307, 0x78 },
	{ 0x030b, 0x01 },
	{ 0x030d, 0x02 },
	{ 0x030e, 0x00 },
	{ 0x030f, 0x4b },
	{ 0x0310, 0x00 },
	{ 0x0700, 0x00 },
	{ 0x0701, 0x10 },
	{ 0x0820, 0x0b },
	{ 0x0821, 0x40 },
	{ 0x3088, 0x04 },
	{ 0x6813, 0x02 },
	{ 0x6835, 0x07 },
	{ 0x6836, 0x01 },
	{ 0x6837, 0x04 },
	{ 0x684d, 0x07 },
	{ 0x684e, 0x01 },
	{ 0x684f, 0x04 },
};

static const struct imx355_reg mode_1640x1232_regs[] = {
	{ 0x0112, 0x0a },
	{ 0x0113, 0x0a },
	{ 0x0114, 0x03 },
	{ 0x0342, 0x07 },
	{ 0x0343, 0x2c },
	{ 0x0340, 0x05 },
	{ 0x0341, 0x1a },
	{ 0x0344, 0x00 },
	{ 0x0345, 0x00 },
	{ 0x0346, 0x00 },
	{ 0x0347, 0x00 },
	{ 0x0348, 0x0c },
	{ 0x0349, 0xcf },
	{ 0x034a, 0x09 },
	{ 0x034b, 0x9f },
	{ 0x0220, 0x00 },
	{ 0x0222, 0x01 },
	{ 0x0900, 0x01 },
	{ 0x0901, 0x22 },
	{ 0x0902, 0x00 },
	{ 0x034c, 0x06 },
	{ 0x034d, 0x68 },
	{ 0x034e, 0x04 },
	{ 0x034f, 0xd0 },
	{ 0x0301, 0x05 },
	{ 0x0303, 0x01 },
	{ 0x0305, 0x02 },
	{ 0x0306, 0x00 },
	{ 0x0307, 0x78 },
	{ 0x030b, 0x01 },
	{ 0x030d, 0x02 },
	{ 0x030e, 0x00 },
	{ 0x030f, 0x4b },
	{ 0x0310, 0x00 },
	{ 0x0700, 0x00 },
	{ 0x0701, 0x10 },
	{ 0x0820, 0x0b },
	{ 0x0821, 0x40 },
	{ 0x3088, 0x04 },
	{ 0x6813, 0x02 },
	{ 0x6835, 0x07 },
	{ 0x6836, 0x01 },
	{ 0x6837, 0x04 },
	{ 0x684d, 0x07 },
	{ 0x684e, 0x01 },
	{ 0x684f, 0x04 },
};

static const struct imx355_reg mode_1640x922_regs[] = {
	{ 0x0112, 0x0a },
	{ 0x0113, 0x0a },
	{ 0x0114, 0x03 },
	{ 0x0342, 0x07 },
	{ 0x0343, 0x2c },
	{ 0x0340, 0x05 },
	{ 0x0341, 0x1a },
	{ 0x0344, 0x00 },
	{ 0x0345, 0x00 },
	{ 0x0346, 0x01 },
	{ 0x0347, 0x30 },
	{ 0x0348, 0x0c },
	{ 0x0349, 0xcf },
	{ 0x034a, 0x08 },
	{ 0x034b, 0x63 },
	{ 0x0220, 0x00 },
	{ 0x0222, 0x01 },
	{ 0x0900, 0x01 },
	{ 0x0901, 0x22 },
	{ 0x0902, 0x00 },
	{ 0x034c, 0x06 },
	{ 0x034d, 0x68 },
	{ 0x034e, 0x03 },
	{ 0x034f, 0x9a },
	{ 0x0301, 0x05 },
	{ 0x0303, 0x01 },
	{ 0x0305, 0x02 },
	{ 0x0306, 0x00 },
	{ 0x0307, 0x78 },
	{ 0x030b, 0x01 },
	{ 0x030d, 0x02 },
	{ 0x030e, 0x00 },
	{ 0x030f, 0x4b },
	{ 0x0310, 0x00 },
	{ 0x0700, 0x00 },
	{ 0x0701, 0x10 },
	{ 0x0820, 0x0b },
	{ 0x0821, 0x40 },
	{ 0x3088, 0x04 },
	{ 0x6813, 0x02 },
	{ 0x6835, 0x07 },
	{ 0x6836, 0x01 },
	{ 0x6837, 0x04 },
	{ 0x684d, 0x07 },
	{ 0x684e, 0x01 },
	{ 0x684f, 0x04 },
};

static const struct imx355_reg mode_1300x736_regs[] = {
	{ 0x0112, 0x0a },
	{ 0x0113, 0x0a },
	{ 0x0114, 0x03 },
	{ 0x0342, 0x07 },
	{ 0x0343, 0x2c },
	{ 0x0340, 0x05 },
	{ 0x0341, 0x1a },
	{ 0x0344, 0x01 },
	{ 0x0345, 0x58 },
	{ 0x0346, 0x01 },
	{ 0x0347, 0xf0 },
	{ 0x0348, 0x0b },
	{ 0x0349, 0x7f },
	{ 0x034a, 0x07 },
	{ 0x034b, 0xaf },
	{ 0x0220, 0x00 },
	{ 0x0222, 0x01 },
	{ 0x0900, 0x01 },
	{ 0x0901, 0x22 },
	{ 0x0902, 0x00 },
	{ 0x034c, 0x05 },
	{ 0x034d, 0x14 },
	{ 0x034e, 0x02 },
	{ 0x034f, 0xe0 },
	{ 0x0301, 0x05 },
	{ 0x0303, 0x01 },
	{ 0x0305, 0x02 },
	{ 0x0306, 0x00 },
	{ 0x0307, 0x78 },
	{ 0x030b, 0x01 },
	{ 0x030d, 0x02 },
	{ 0x030e, 0x00 },
	{ 0x030f, 0x4b },
	{ 0x0310, 0x00 },
	{ 0x0700, 0x00 },
	{ 0x0701, 0x10 },
	{ 0x0820, 0x0b },
	{ 0x0821, 0x40 },
	{ 0x3088, 0x04 },
	{ 0x6813, 0x02 },
	{ 0x6835, 0x07 },
	{ 0x6836, 0x01 },
	{ 0x6837, 0x04 },
	{ 0x684d, 0x07 },
	{ 0x684e, 0x01 },
	{ 0x684f, 0x04 },
};

static const struct imx355_reg mode_1296x736_regs[] = {
	{ 0x0112, 0x0a },
	{ 0x0113, 0x0a },
	{ 0x0114, 0x03 },
	{ 0x0342, 0x07 },
	{ 0x0343, 0x2c },
	{ 0x0340, 0x05 },
	{ 0x0341, 0x1a },
	{ 0x0344, 0x01 },
	{ 0x0345, 0x58 },
	{ 0x0346, 0x01 },
	{ 0x0347, 0xf0 },
	{ 0x0348, 0x0b },
	{ 0x0349, 0x77 },
	{ 0x034a, 0x07 },
	{ 0x034b, 0xaf },
	{ 0x0220, 0x00 },
	{ 0x0222, 0x01 },
	{ 0x0900, 0x01 },
	{ 0x0901, 0x22 },
	{ 0x0902, 0x00 },
	{ 0x034c, 0x05 },
	{ 0x034d, 0x10 },
	{ 0x034e, 0x02 },
	{ 0x034f, 0xe0 },
	{ 0x0301, 0x05 },
	{ 0x0303, 0x01 },
	{ 0x0305, 0x02 },
	{ 0x0306, 0x00 },
	{ 0x0307, 0x78 },
	{ 0x030b, 0x01 },
	{ 0x030d, 0x02 },
	{ 0x030e, 0x00 },
	{ 0x030f, 0x4b },
	{ 0x0310, 0x00 },
	{ 0x0700, 0x00 },
	{ 0x0701, 0x10 },
	{ 0x0820, 0x0b },
	{ 0x0821, 0x40 },
	{ 0x3088, 0x04 },
	{ 0x6813, 0x02 },
	{ 0x6835, 0x07 },
	{ 0x6836, 0x01 },
	{ 0x6837, 0x04 },
	{ 0x684d, 0x07 },
	{ 0x684e, 0x01 },
	{ 0x684f, 0x04 },
};

static const struct imx355_reg mode_1284x720_regs[] = {
	{ 0x0112, 0x0a },
	{ 0x0113, 0x0a },
	{ 0x0114, 0x03 },
	{ 0x0342, 0x07 },
	{ 0x0343, 0x2c },
	{ 0x0340, 0x05 },
	{ 0x0341, 0x1a },
	{ 0x0344, 0x01 },
	{ 0x0345, 0x68 },
	{ 0x0346, 0x02 },
	{ 0x0347, 0x00 },
	{ 0x0348, 0x0b },
	{ 0x0349, 0x6f },
	{ 0x034a, 0x07 },
	{ 0x034b, 0x9f },
	{ 0x0220, 0x00 },
	{ 0x0222, 0x01 },
	{ 0x0900, 0x01 },
	{ 0x0901, 0x22 },
	{ 0x0902, 0x00 },
	{ 0x034c, 0x05 },
	{ 0x034d, 0x04 },
	{ 0x034e, 0x02 },
	{ 0x034f, 0xd0 },
	{ 0x0301, 0x05 },
	{ 0x0303, 0x01 },
	{ 0x0305, 0x02 },
	{ 0x0306, 0x00 },
	{ 0x0307, 0x78 },
	{ 0x030b, 0x01 },
	{ 0x030d, 0x02 },
	{ 0x030e, 0x00 },
	{ 0x030f, 0x4b },
	{ 0x0310, 0x00 },
	{ 0x0700, 0x00 },
	{ 0x0701, 0x10 },
	{ 0x0820, 0x0b },
	{ 0x0821, 0x40 },
	{ 0x3088, 0x04 },
	{ 0x6813, 0x02 },
	{ 0x6835, 0x07 },
	{ 0x6836, 0x01 },
	{ 0x6837, 0x04 },
	{ 0x684d, 0x07 },
	{ 0x684e, 0x01 },
	{ 0x684f, 0x04 },
};

static const struct imx355_reg mode_1280x720_regs[] = {
	{ 0x0112, 0x0a },
	{ 0x0113, 0x0a },
	{ 0x0114, 0x03 },
	{ 0x0342, 0x07 },
	{ 0x0343, 0x2c },
	{ 0x0340, 0x05 },
	{ 0x0341, 0x1a },
	{ 0x0344, 0x01 },
	{ 0x0345, 0x68 },
	{ 0x0346, 0x02 },
	{ 0x0347, 0x00 },
	{ 0x0348, 0x0b },
	{ 0x0349, 0x67 },
	{ 0x034a, 0x07 },
	{ 0x034b, 0x9f },
	{ 0x0220, 0x00 },
	{ 0x0222, 0x01 },
	{ 0x0900, 0x01 },
	{ 0x0901, 0x22 },
	{ 0x0902, 0x00 },
	{ 0x034c, 0x05 },
	{ 0x034d, 0x00 },
	{ 0x034e, 0x02 },
	{ 0x034f, 0xd0 },
	{ 0x0301, 0x05 },
	{ 0x0303, 0x01 },
	{ 0x0305, 0x02 },
	{ 0x0306, 0x00 },
	{ 0x0307, 0x78 },
	{ 0x030b, 0x01 },
	{ 0x030d, 0x02 },
	{ 0x030e, 0x00 },
	{ 0x030f, 0x4b },
	{ 0x0310, 0x00 },
	{ 0x0700, 0x00 },
	{ 0x0701, 0x10 },
	{ 0x0820, 0x0b },
	{ 0x0821, 0x40 },
	{ 0x3088, 0x04 },
	{ 0x6813, 0x02 },
	{ 0x6835, 0x07 },
	{ 0x6836, 0x01 },
	{ 0x6837, 0x04 },
	{ 0x684d, 0x07 },
	{ 0x684e, 0x01 },
	{ 0x684f, 0x04 },
};

static const struct imx355_reg mode_820x616_regs[] = {
	{ 0x0112, 0x0a },
	{ 0x0113, 0x0a },
	{ 0x0114, 0x03 },
	{ 0x0342, 0x0e },
	{ 0x0343, 0x58 },
	{ 0x0340, 0x02 },
	{ 0x0341, 0x8c },
	{ 0x0344, 0x00 },
	{ 0x0345, 0x00 },
	{ 0x0346, 0x00 },
	{ 0x0347, 0x00 },
	{ 0x0348, 0x0c },
	{ 0x0349, 0xcf },
	{ 0x034a, 0x09 },
	{ 0x034b, 0x9f },
	{ 0x0220, 0x00 },
	{ 0x0222, 0x01 },
	{ 0x0900, 0x01 },
	{ 0x0901, 0x44 },
	{ 0x0902, 0x00 },
	{ 0x034c, 0x03 },
	{ 0x034d, 0x34 },
	{ 0x034e, 0x02 },
	{ 0x034f, 0x68 },
	{ 0x0301, 0x05 },
	{ 0x0303, 0x01 },
	{ 0x0305, 0x02 },
	{ 0x0306, 0x00 },
	{ 0x0307, 0x78 },
	{ 0x030b, 0x01 },
	{ 0x030d, 0x02 },
	{ 0x030e, 0x00 },
	{ 0x030f, 0x4b },
	{ 0x0310, 0x00 },
	{ 0x0700, 0x02 },
	{ 0x0701, 0x78 },
	{ 0x0820, 0x0b },
	{ 0x0821, 0x40 },
	{ 0x3088, 0x04 },
	{ 0x6813, 0x02 },
	{ 0x6835, 0x07 },
	{ 0x6836, 0x01 },
	{ 0x6837, 0x04 },
	{ 0x684d, 0x07 },
	{ 0x684e, 0x01 },
	{ 0x684f, 0x04 },
};

static const char * const imx355_test_pattern_menu[] = {
	"Disabled",
	"Solid Colour",
	"Eight Vertical Colour Bars",
	"Colour Bars With Fade to Grey",
	"Pseudorandom Sequence (PN9)",
};

/* supported link frequencies */
static const s64 link_freq_menu_items[] = {
	IMX355_LINK_FREQ_DEFAULT,
};

/* Mode configs */
static const struct imx355_mode supported_modes[] = {
	{
		.width = 3280,
		.height = 2464,
		.fll_def = 2615,
		.fll_min = 2615,
		.llp = 3672,
		.link_freq_index = IMX355_LINK_FREQ_INDEX,
		.reg_list = {
			.num_of_regs = ARRAY_SIZE(mode_3280x2464_regs),
			.regs = mode_3280x2464_regs,
		},
	},
	{
		.width = 3268,
		.height = 2448,
		.fll_def = 2615,
		.fll_min = 2615,
		.llp = 3672,
		.link_freq_index = IMX355_LINK_FREQ_INDEX,
		.reg_list = {
			.num_of_regs = ARRAY_SIZE(mode_3268x2448_regs),
			.regs = mode_3268x2448_regs,
		},
	},
	{
		.width = 3264,
		.height = 2448,
		.fll_def = 2615,
		.fll_min = 2615,
		.llp = 3672,
		.link_freq_index = IMX355_LINK_FREQ_INDEX,
		.reg_list = {
			.num_of_regs = ARRAY_SIZE(mode_3264x2448_regs),
			.regs = mode_3264x2448_regs,
		},
	},
	{
		.width = 1940,
		.height = 1096,
		.fll_def = 1306,
		.fll_min = 1306,
		.llp = 3672,
		.link_freq_index = IMX355_LINK_FREQ_INDEX,
		.reg_list = {
			.num_of_regs = ARRAY_SIZE(mode_1940x1096_regs),
			.regs = mode_1940x1096_regs,
		},
	},
	{
		.width = 1936,
		.height = 1096,
		.fll_def = 1306,
		.fll_min = 1306,
		.llp = 3672,
		.link_freq_index = IMX355_LINK_FREQ_INDEX,
		.reg_list = {
			.num_of_regs = ARRAY_SIZE(mode_1936x1096_regs),
			.regs = mode_1936x1096_regs,
		},
	},
	{
		.width = 1924,
		.height = 1080,
		.fll_def = 1306,
		.fll_min = 1306,
		.llp = 3672,
		.link_freq_index = IMX355_LINK_FREQ_INDEX,
		.reg_list = {
			.num_of_regs = ARRAY_SIZE(mode_1924x1080_regs),
			.regs = mode_1924x1080_regs,
		},
	},
	{
		.width = 1920,
		.height = 1080,
		.fll_def = 1306,
		.fll_min = 1306,
		.llp = 3672,
		.link_freq_index = IMX355_LINK_FREQ_INDEX,
		.reg_list = {
			.num_of_regs = ARRAY_SIZE(mode_1920x1080_regs),
			.regs = mode_1920x1080_regs,
		},
	},
	{
		.width = 1640,
		.height = 1232,
		.fll_def = 1306,
		.fll_min = 1306,
		.llp = 1836,
		.link_freq_index = IMX355_LINK_FREQ_INDEX,
		.reg_list = {
			.num_of_regs = ARRAY_SIZE(mode_1640x1232_regs),
			.regs = mode_1640x1232_regs,
		},
	},
	{
		.width = 1640,
		.height = 922,
		.fll_def = 1306,
		.fll_min = 1306,
		.llp = 1836,
		.link_freq_index = IMX355_LINK_FREQ_INDEX,
		.reg_list = {
			.num_of_regs = ARRAY_SIZE(mode_1640x922_regs),
			.regs = mode_1640x922_regs,
		},
	},
	{
		.width = 1300,
		.height = 736,
		.fll_def = 1306,
		.fll_min = 1306,
		.llp = 1836,
		.link_freq_index = IMX355_LINK_FREQ_INDEX,
		.reg_list = {
			.num_of_regs = ARRAY_SIZE(mode_1300x736_regs),
			.regs = mode_1300x736_regs,
		},
	},
	{
		.width = 1296,
		.height = 736,
		.fll_def = 1306,
		.fll_min = 1306,
		.llp = 1836,
		.link_freq_index = IMX355_LINK_FREQ_INDEX,
		.reg_list = {
			.num_of_regs = ARRAY_SIZE(mode_1296x736_regs),
			.regs = mode_1296x736_regs,
		},
	},
	{
		.width = 1284,
		.height = 720,
		.fll_def = 1306,
		.fll_min = 1306,
		.llp = 1836,
		.link_freq_index = IMX355_LINK_FREQ_INDEX,
		.reg_list = {
			.num_of_regs = ARRAY_SIZE(mode_1284x720_regs),
			.regs = mode_1284x720_regs,
		},
	},
	{
		.width = 1280,
		.height = 720,
		.fll_def = 1306,
		.fll_min = 1306,
		.llp = 1836,
		.link_freq_index = IMX355_LINK_FREQ_INDEX,
		.reg_list = {
			.num_of_regs = ARRAY_SIZE(mode_1280x720_regs),
			.regs = mode_1280x720_regs,
		},
	},
	{
		.width = 820,
		.height = 616,
		.fll_def = 652,
		.fll_min = 652,
		.llp = 3672,
		.link_freq_index = IMX355_LINK_FREQ_INDEX,
		.reg_list = {
			.num_of_regs = ARRAY_SIZE(mode_820x616_regs),
			.regs = mode_820x616_regs,
		},
	},
};

static inline struct imx355 *to_imx355(struct v4l2_subdev *_sd)
{
	return container_of(_sd, struct imx355, sd);
}

/* Get bayer order based on flip setting. */
static u32 imx355_get_format_code(struct imx355 *imx355)
{
	/*
	 * Only one bayer order is supported.
	 * It depends on the flip settings.
	 */
	u32 code;
	static const u32 codes[2][2] = {
		{ MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10, },
		{ MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10, },
	};

	lockdep_assert_held(&imx355->mutex);
	code = codes[imx355->vflip->val][imx355->hflip->val];

	return code;
}

/* Read registers up to 4 at a time */
static int imx355_read_reg(struct imx355 *imx355, u16 reg, u32 len, u32 *val)
{
	struct i2c_client *client = v4l2_get_subdevdata(&imx355->sd);
	struct i2c_msg msgs[2];
	u8 addr_buf[2];
	u8 data_buf[4] = { 0 };
	int ret;

	if (len > 4)
		return -EINVAL;

	put_unaligned_be16(reg, addr_buf);
	/* Write register address */
	msgs[0].addr = client->addr;
	msgs[0].flags = 0;
	msgs[0].len = ARRAY_SIZE(addr_buf);
	msgs[0].buf = addr_buf;

	/* Read data from register */
	msgs[1].addr = client->addr;
	msgs[1].flags = I2C_M_RD;
	msgs[1].len = len;
	msgs[1].buf = &data_buf[4 - len];

	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
	if (ret != ARRAY_SIZE(msgs))
		return -EIO;

	*val = get_unaligned_be32(data_buf);

	return 0;
}

/* Write registers up to 4 at a time */
static int imx355_write_reg(struct imx355 *imx355, u16 reg, u32 len, u32 val)
{
	struct i2c_client *client = v4l2_get_subdevdata(&imx355->sd);
	u8 buf[6];

	if (len > 4)
		return -EINVAL;

	put_unaligned_be16(reg, buf);
	put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
	if (i2c_master_send(client, buf, len + 2) != len + 2)
		return -EIO;

	return 0;
}

/* Write a list of registers */
static int imx355_write_regs(struct imx355 *imx355,
			     const struct imx355_reg *regs, u32 len)
{
	struct i2c_client *client = v4l2_get_subdevdata(&imx355->sd);
	int ret;
	u32 i;

	for (i = 0; i < len; i++) {
		ret = imx355_write_reg(imx355, regs[i].address, 1, regs[i].val);
		if (ret) {
			dev_err_ratelimited(&client->dev,
					    "write reg 0x%4.4x return err %d",
					    regs[i].address, ret);

			return ret;
		}
	}

	return 0;
}

/* Open sub-device */
static int imx355_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
	struct imx355 *imx355 = to_imx355(sd);
	struct v4l2_mbus_framefmt *try_fmt =
		v4l2_subdev_get_try_format(sd, fh->state, 0);

	mutex_lock(&imx355->mutex);

	/* Initialize try_fmt */
	try_fmt->width = imx355->cur_mode->width;
	try_fmt->height = imx355->cur_mode->height;
	try_fmt->code = imx355_get_format_code(imx355);
	try_fmt->field = V4L2_FIELD_NONE;

	mutex_unlock(&imx355->mutex);

	return 0;
}

static int imx355_set_ctrl(struct v4l2_ctrl *ctrl)
{
	struct imx355 *imx355 = container_of(ctrl->handler,
					     struct imx355, ctrl_handler);
	struct i2c_client *client = v4l2_get_subdevdata(&imx355->sd);
	s64 max;
	int ret;

	/* Propagate change of current control to all related controls */
	switch (ctrl->id) {
	case V4L2_CID_VBLANK:
		/* Update max exposure while meeting expected vblanking */
		max = imx355->cur_mode->height + ctrl->val - 10;
		__v4l2_ctrl_modify_range(imx355->exposure,
					 imx355->exposure->minimum,
					 max, imx355->exposure->step, max);
		break;
	}

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

	switch (ctrl->id) {
	case V4L2_CID_ANALOGUE_GAIN:
		/* Analog gain = 1024/(1024 - ctrl->val) times */
		ret = imx355_write_reg(imx355, IMX355_REG_ANALOG_GAIN, 2,
				       ctrl->val);
		break;
	case V4L2_CID_DIGITAL_GAIN:
		ret = imx355_write_reg(imx355, IMX355_REG_DIG_GAIN_GLOBAL, 2,
				       ctrl->val);
		break;
	case V4L2_CID_EXPOSURE:
		ret = imx355_write_reg(imx355, IMX355_REG_EXPOSURE, 2,
				       ctrl->val);
		break;
	case V4L2_CID_VBLANK:
		/* Update FLL that meets expected vertical blanking */
		ret = imx355_write_reg(imx355, IMX355_REG_FLL, 2,
				       imx355->cur_mode->height + ctrl->val);
		break;
	case V4L2_CID_TEST_PATTERN:
		ret = imx355_write_reg(imx355, IMX355_REG_TEST_PATTERN,
				       2, ctrl->val);
		break;
	case V4L2_CID_HFLIP:
	case V4L2_CID_VFLIP:
		ret = imx355_write_reg(imx355, IMX355_REG_ORIENTATION, 1,
				       imx355->hflip->val |
				       imx355->vflip->val << 1);
		break;
	default:
		ret = -EINVAL;
		dev_info(&client->dev, "ctrl(id:0x%x,val:0x%x) is not handled",
			 ctrl->id, ctrl->val);
		break;
	}

	pm_runtime_put(&client->dev);

	return ret;
}

static const struct v4l2_ctrl_ops imx355_ctrl_ops = {
	.s_ctrl = imx355_set_ctrl,
};

static int imx355_enum_mbus_code(struct v4l2_subdev *sd,
				 struct v4l2_subdev_state *sd_state,
				 struct v4l2_subdev_mbus_code_enum *code)
{
	struct imx355 *imx355 = to_imx355(sd);

	if (code->index > 0)
		return -EINVAL;

	mutex_lock(&imx355->mutex);
	code->code = imx355_get_format_code(imx355);
	mutex_unlock(&imx355->mutex);

	return 0;
}

static int imx355_enum_frame_size(struct v4l2_subdev *sd,
				  struct v4l2_subdev_state *sd_state,
				  struct v4l2_subdev_frame_size_enum *fse)
{
	struct imx355 *imx355 = to_imx355(sd);

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

	mutex_lock(&imx355->mutex);
	if (fse->code != imx355_get_format_code(imx355)) {
		mutex_unlock(&imx355->mutex);
		return -EINVAL;
	}
	mutex_unlock(&imx355->mutex);

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

	return 0;
}

static void imx355_update_pad_format(struct imx355 *imx355,
				     const struct imx355_mode *mode,
				     struct v4l2_subdev_format *fmt)
{
	fmt->format.width = mode->width;
	fmt->format.height = mode->height;
	fmt->format.code = imx355_get_format_code(imx355);
	fmt->format.field = V4L2_FIELD_NONE;
}

static int imx355_do_get_pad_format(struct imx355 *imx355,
				    struct v4l2_subdev_state *sd_state,
				    struct v4l2_subdev_format *fmt)
{
	struct v4l2_mbus_framefmt *framefmt;
	struct v4l2_subdev *sd = &imx355->sd;

	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
		framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
		fmt->format = *framefmt;
	} else {
		imx355_update_pad_format(imx355, imx355->cur_mode, fmt);
	}

	return 0;
}

static int imx355_get_pad_format(struct v4l2_subdev *sd,
				 struct v4l2_subdev_state *sd_state,
				 struct v4l2_subdev_format *fmt)
{
	struct imx355 *imx355 = to_imx355(sd);
	int ret;

	mutex_lock(&imx355->mutex);
	ret = imx355_do_get_pad_format(imx355, sd_state, fmt);
	mutex_unlock(&imx355->mutex);

	return ret;
}

static int
imx355_set_pad_format(struct v4l2_subdev *sd,
		      struct v4l2_subdev_state *sd_state,
		      struct v4l2_subdev_format *fmt)
{
	struct imx355 *imx355 = to_imx355(sd);
	const struct imx355_mode *mode;
	struct v4l2_mbus_framefmt *framefmt;
	s32 vblank_def;
	s32 vblank_min;
	s64 h_blank;
	u64 pixel_rate;
	u32 height;

	mutex_lock(&imx355->mutex);

	/*
	 * Only one bayer order is supported.
	 * It depends on the flip settings.
	 */
	fmt->format.code = imx355_get_format_code(imx355);

	mode = v4l2_find_nearest_size(supported_modes,
				      ARRAY_SIZE(supported_modes),
				      width, height,
				      fmt->format.width, fmt->format.height);
	imx355_update_pad_format(imx355, mode, fmt);
	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
		framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
		*framefmt = fmt->format;
	} else {
		imx355->cur_mode = mode;
		pixel_rate = imx355->link_def_freq * 2 * 4;
		do_div(pixel_rate, 10);
		__v4l2_ctrl_s_ctrl_int64(imx355->pixel_rate, pixel_rate);
		/* Update limits and set FPS to default */
		height = imx355->cur_mode->height;
		vblank_def = imx355->cur_mode->fll_def - height;
		vblank_min = imx355->cur_mode->fll_min - height;
		height = IMX355_FLL_MAX - height;
		__v4l2_ctrl_modify_range(imx355->vblank, vblank_min, height, 1,
					 vblank_def);
		__v4l2_ctrl_s_ctrl(imx355->vblank, vblank_def);
		h_blank = mode->llp - imx355->cur_mode->width;
		/*
		 * Currently hblank is not changeable.
		 * So FPS control is done only by vblank.
		 */
		__v4l2_ctrl_modify_range(imx355->hblank, h_blank,
					 h_blank, 1, h_blank);
	}

	mutex_unlock(&imx355->mutex);

	return 0;
}

/* Start streaming */
static int imx355_start_streaming(struct imx355 *imx355)
{
	struct i2c_client *client = v4l2_get_subdevdata(&imx355->sd);
	const struct imx355_reg_list *reg_list;
	int ret;

	/* Global Setting */
	reg_list = &imx355_global_setting;
	ret = imx355_write_regs(imx355, reg_list->regs, reg_list->num_of_regs);
	if (ret) {
		dev_err(&client->dev, "failed to set global settings");
		return ret;
	}

	/* Apply default values of current mode */
	reg_list = &imx355->cur_mode->reg_list;
	ret = imx355_write_regs(imx355, reg_list->regs, reg_list->num_of_regs);
	if (ret) {
		dev_err(&client->dev, "failed to set mode");
		return ret;
	}

	/* set digital gain control to all color mode */
	ret = imx355_write_reg(imx355, IMX355_REG_DPGA_USE_GLOBAL_GAIN, 1, 1);
	if (ret)
		return ret;

	/* Apply customized values from user */
	ret =  __v4l2_ctrl_handler_setup(imx355->sd.ctrl_handler);
	if (ret)
		return ret;

	return imx355_write_reg(imx355, IMX355_REG_MODE_SELECT,
				1, IMX355_MODE_STREAMING);
}

/* Stop streaming */
static int imx355_stop_streaming(struct imx355 *imx355)
{
	return imx355_write_reg(imx355, IMX355_REG_MODE_SELECT,
				1, IMX355_MODE_STANDBY);
}

static int imx355_set_stream(struct v4l2_subdev *sd, int enable)
{
	struct imx355 *imx355 = to_imx355(sd);
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	int ret = 0;

	mutex_lock(&imx355->mutex);
	if (imx355->streaming == enable) {
		mutex_unlock(&imx355->mutex);
		return 0;
	}

	if (enable) {
		ret = pm_runtime_resume_and_get(&client->dev);
		if (ret < 0)
			goto err_unlock;

		/*
		 * Apply default & customized values
		 * and then start streaming.
		 */
		ret = imx355_start_streaming(imx355);
		if (ret)
			goto err_rpm_put;
	} else {
		imx355_stop_streaming(imx355);
		pm_runtime_put(&client->dev);
	}

	imx355->streaming = enable;

	/* vflip and hflip cannot change during streaming */
	__v4l2_ctrl_grab(imx355->vflip, enable);
	__v4l2_ctrl_grab(imx355->hflip, enable);

	mutex_unlock(&imx355->mutex);

	return ret;

err_rpm_put:
	pm_runtime_put(&client->dev);
err_unlock:
	mutex_unlock(&imx355->mutex);

	return ret;
}

static int __maybe_unused imx355_suspend(struct device *dev)
{
	struct v4l2_subdev *sd = dev_get_drvdata(dev);
	struct imx355 *imx355 = to_imx355(sd);

	if (imx355->streaming)
		imx355_stop_streaming(imx355);

	return 0;
}

static int __maybe_unused imx355_resume(struct device *dev)
{
	struct v4l2_subdev *sd = dev_get_drvdata(dev);
	struct imx355 *imx355 = to_imx355(sd);
	int ret;

	if (imx355->streaming) {
		ret = imx355_start_streaming(imx355);
		if (ret)
			goto error;
	}

	return 0;

error:
	imx355_stop_streaming(imx355);
	imx355->streaming = 0;
	return ret;
}

/* Verify chip ID */
static int imx355_identify_module(struct imx355 *imx355)
{
	struct i2c_client *client = v4l2_get_subdevdata(&imx355->sd);
	int ret;
	u32 val;

	ret = imx355_read_reg(imx355, IMX355_REG_CHIP_ID, 2, &val);
	if (ret)
		return ret;

	if (val != IMX355_CHIP_ID) {
		dev_err(&client->dev, "chip id mismatch: %x!=%x",
			IMX355_CHIP_ID, val);
		return -EIO;
	}
	return 0;
}

static const struct v4l2_subdev_core_ops imx355_subdev_core_ops = {
	.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
	.unsubscribe_event = v4l2_event_subdev_unsubscribe,
};

static const struct v4l2_subdev_video_ops imx355_video_ops = {
	.s_stream = imx355_set_stream,
};

static const struct v4l2_subdev_pad_ops imx355_pad_ops = {
	.enum_mbus_code = imx355_enum_mbus_code,
	.get_fmt = imx355_get_pad_format,
	.set_fmt = imx355_set_pad_format,
	.enum_frame_size = imx355_enum_frame_size,
};

static const struct v4l2_subdev_ops imx355_subdev_ops = {
	.core = &imx355_subdev_core_ops,
	.video = &imx355_video_ops,
	.pad = &imx355_pad_ops,
};

static const struct media_entity_operations imx355_subdev_entity_ops = {
	.link_validate = v4l2_subdev_link_validate,
};

static const struct v4l2_subdev_internal_ops imx355_internal_ops = {
	.open = imx355_open,
};

/* Initialize control handlers */
static int imx355_init_controls(struct imx355 *imx355)
{
	struct i2c_client *client = v4l2_get_subdevdata(&imx355->sd);
	struct v4l2_ctrl_handler *ctrl_hdlr;
	s64 exposure_max;
	s64 vblank_def;
	s64 vblank_min;
	s64 hblank;
	u64 pixel_rate;
	const struct imx355_mode *mode;
	u32 max;
	int ret;

	ctrl_hdlr = &imx355->ctrl_handler;
	ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10);
	if (ret)
		return ret;

	ctrl_hdlr->lock = &imx355->mutex;
	max = ARRAY_SIZE(link_freq_menu_items) - 1;
	imx355->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &imx355_ctrl_ops,
						   V4L2_CID_LINK_FREQ, max, 0,
						   link_freq_menu_items);
	if (imx355->link_freq)
		imx355->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;

	/* pixel_rate = link_freq * 2 * nr_of_lanes / bits_per_sample */
	pixel_rate = imx355->link_def_freq * 2 * 4;
	do_div(pixel_rate, 10);
	/* By default, PIXEL_RATE is read only */
	imx355->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx355_ctrl_ops,
					       V4L2_CID_PIXEL_RATE, pixel_rate,
					       pixel_rate, 1, pixel_rate);

	/* Initialize vblank/hblank/exposure parameters based on current mode */
	mode = imx355->cur_mode;
	vblank_def = mode->fll_def - mode->height;
	vblank_min = mode->fll_min - mode->height;
	imx355->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx355_ctrl_ops,
					   V4L2_CID_VBLANK, vblank_min,
					   IMX355_FLL_MAX - mode->height,
					   1, vblank_def);

	hblank = mode->llp - mode->width;
	imx355->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx355_ctrl_ops,
					   V4L2_CID_HBLANK, hblank, hblank,
					   1, hblank);
	if (imx355->hblank)
		imx355->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;

	/* fll >= exposure time + adjust parameter (default value is 10) */
	exposure_max = mode->fll_def - 10;
	imx355->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &imx355_ctrl_ops,
					     V4L2_CID_EXPOSURE,
					     IMX355_EXPOSURE_MIN, exposure_max,
					     IMX355_EXPOSURE_STEP,
					     IMX355_EXPOSURE_DEFAULT);

	imx355->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx355_ctrl_ops,
					  V4L2_CID_HFLIP, 0, 1, 1, 0);
	if (imx355->hflip)
		imx355->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
	imx355->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx355_ctrl_ops,
					  V4L2_CID_VFLIP, 0, 1, 1, 0);
	if (imx355->vflip)
		imx355->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;

	v4l2_ctrl_new_std(ctrl_hdlr, &imx355_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
			  IMX355_ANA_GAIN_MIN, IMX355_ANA_GAIN_MAX,
			  IMX355_ANA_GAIN_STEP, IMX355_ANA_GAIN_DEFAULT);

	/* Digital gain */
	v4l2_ctrl_new_std(ctrl_hdlr, &imx355_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
			  IMX355_DGTL_GAIN_MIN, IMX355_DGTL_GAIN_MAX,
			  IMX355_DGTL_GAIN_STEP, IMX355_DGTL_GAIN_DEFAULT);

	v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &imx355_ctrl_ops,
				     V4L2_CID_TEST_PATTERN,
				     ARRAY_SIZE(imx355_test_pattern_menu) - 1,
				     0, 0, imx355_test_pattern_menu);
	if (ctrl_hdlr->error) {
		ret = ctrl_hdlr->error;
		dev_err(&client->dev, "control init failed: %d", ret);
		goto error;
	}

	imx355->sd.ctrl_handler = ctrl_hdlr;

	return 0;

error:
	v4l2_ctrl_handler_free(ctrl_hdlr);

	return ret;
}

static struct imx355_hwcfg *imx355_get_hwcfg(struct device *dev)
{
	struct imx355_hwcfg *cfg;
	struct v4l2_fwnode_endpoint bus_cfg = {
		.bus_type = V4L2_MBUS_CSI2_DPHY
	};
	struct fwnode_handle *ep;
	struct fwnode_handle *fwnode = dev_fwnode(dev);
	unsigned int i;
	int ret;

	if (!fwnode)
		return NULL;

	ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
	if (!ep)
		return NULL;

	ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
	if (ret)
		goto out_err;

	cfg = devm_kzalloc(dev, sizeof(*cfg), GFP_KERNEL);
	if (!cfg)
		goto out_err;

	ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency",
				       &cfg->ext_clk);
	if (ret) {
		dev_err(dev, "can't get clock frequency");
		goto out_err;
	}

	dev_dbg(dev, "ext clk: %d", cfg->ext_clk);
	if (cfg->ext_clk != IMX355_EXT_CLK) {
		dev_err(dev, "external clock %d is not supported",
			cfg->ext_clk);
		goto out_err;
	}

	dev_dbg(dev, "num of link freqs: %d", bus_cfg.nr_of_link_frequencies);
	if (!bus_cfg.nr_of_link_frequencies) {
		dev_warn(dev, "no link frequencies defined");
		goto out_err;
	}

	cfg->nr_of_link_freqs = bus_cfg.nr_of_link_frequencies;
	cfg->link_freqs = devm_kcalloc(dev,
				       bus_cfg.nr_of_link_frequencies + 1,
				       sizeof(*cfg->link_freqs), GFP_KERNEL);
	if (!cfg->link_freqs)
		goto out_err;

	for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++) {
		cfg->link_freqs[i] = bus_cfg.link_frequencies[i];
		dev_dbg(dev, "link_freq[%d] = %lld", i, cfg->link_freqs[i]);
	}

	v4l2_fwnode_endpoint_free(&bus_cfg);
	fwnode_handle_put(ep);
	return cfg;

out_err:
	v4l2_fwnode_endpoint_free(&bus_cfg);
	fwnode_handle_put(ep);
	return NULL;
}

static int imx355_probe(struct i2c_client *client)
{
	struct imx355 *imx355;
	int ret;
	u32 i;

	imx355 = devm_kzalloc(&client->dev, sizeof(*imx355), GFP_KERNEL);
	if (!imx355)
		return -ENOMEM;

	mutex_init(&imx355->mutex);

	/* Initialize subdev */
	v4l2_i2c_subdev_init(&imx355->sd, client, &imx355_subdev_ops);

	/* Check module identity */
	ret = imx355_identify_module(imx355);
	if (ret) {
		dev_err(&client->dev, "failed to find sensor: %d", ret);
		goto error_probe;
	}

	imx355->hwcfg = imx355_get_hwcfg(&client->dev);
	if (!imx355->hwcfg) {
		dev_err(&client->dev, "failed to get hwcfg");
		ret = -ENODEV;
		goto error_probe;
	}

	imx355->link_def_freq = link_freq_menu_items[IMX355_LINK_FREQ_INDEX];
	for (i = 0; i < imx355->hwcfg->nr_of_link_freqs; i++) {
		if (imx355->hwcfg->link_freqs[i] == imx355->link_def_freq) {
			dev_dbg(&client->dev, "link freq index %d matched", i);
			break;
		}
	}

	if (i == imx355->hwcfg->nr_of_link_freqs) {
		dev_err(&client->dev, "no link frequency supported");
		ret = -EINVAL;
		goto error_probe;
	}

	/* Set default mode to max resolution */
	imx355->cur_mode = &supported_modes[0];

	ret = imx355_init_controls(imx355);
	if (ret) {
		dev_err(&client->dev, "failed to init controls: %d", ret);
		goto error_probe;
	}

	/* Initialize subdev */
	imx355->sd.internal_ops = &imx355_internal_ops;
	imx355->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
		V4L2_SUBDEV_FL_HAS_EVENTS;
	imx355->sd.entity.ops = &imx355_subdev_entity_ops;
	imx355->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;

	/* Initialize source pad */
	imx355->pad.flags = MEDIA_PAD_FL_SOURCE;
	ret = media_entity_pads_init(&imx355->sd.entity, 1, &imx355->pad);
	if (ret) {
		dev_err(&client->dev, "failed to init entity pads: %d", ret);
		goto error_handler_free;
	}

	ret = v4l2_async_register_subdev_sensor(&imx355->sd);
	if (ret < 0)
		goto error_media_entity;

	/*
	 * Device is already turned on by i2c-core with ACPI domain PM.
	 * Enable runtime PM and turn off the device.
	 */
	pm_runtime_set_active(&client->dev);
	pm_runtime_enable(&client->dev);
	pm_runtime_idle(&client->dev);

	return 0;

error_media_entity:
	media_entity_cleanup(&imx355->sd.entity);

error_handler_free:
	v4l2_ctrl_handler_free(imx355->sd.ctrl_handler);

error_probe:
	mutex_destroy(&imx355->mutex);

	return ret;
}

static void imx355_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct imx355 *imx355 = to_imx355(sd);

	v4l2_async_unregister_subdev(sd);
	media_entity_cleanup(&sd->entity);
	v4l2_ctrl_handler_free(sd->ctrl_handler);

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

	mutex_destroy(&imx355->mutex);
}

static const struct dev_pm_ops imx355_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(imx355_suspend, imx355_resume)
};

static const struct acpi_device_id imx355_acpi_ids[] __maybe_unused = {
	{ "SONY355A" },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(acpi, imx355_acpi_ids);

static struct i2c_driver imx355_i2c_driver = {
	.driver = {
		.name = "imx355",
		.pm = &imx355_pm_ops,
		.acpi_match_table = ACPI_PTR(imx355_acpi_ids),
	},
	.probe = imx355_probe,
	.remove = imx355_remove,
};
module_i2c_driver(imx355_i2c_driver);

MODULE_AUTHOR("Qiu, Tianshu <tian.shu.qiu@intel.com>");
MODULE_AUTHOR("Rapolu, Chiranjeevi");
MODULE_AUTHOR("Bingbu Cao <bingbu.cao@intel.com>");
MODULE_AUTHOR("Yang, Hyungwoo");
MODULE_DESCRIPTION("Sony imx355 sensor driver");
MODULE_LICENSE("GPL v2");
