root/drivers/media/i2c/vd55g1.c
// SPDX-License-Identifier: GPL-2.0
/*
 * Driver for VD55G1 global shutter sensor family driver
 *
 * Copyright (C) 2025 STMicroelectronics SA
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/unaligned.h>
#include <linux/units.h>

#include <media/mipi-csi2.h>
#include <media/v4l2-async.h>
#include <media/v4l2-cci.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>

/* Register Map */
#define VD55G1_REG_MODEL_ID                             CCI_REG32_LE(0x0000)
#define VD55G1_MODEL_ID_VD55G1                          0x53354731 /* Mono */
#define VD55G1_MODEL_ID_VD65G4                          0x53354733 /* RGB */
#define VD55G1_REG_REVISION                             CCI_REG16_LE(0x0004)
#define VD55G1_REVISION_CCB                             0x2020
#define VD55G1_REVISION_BAYER                           0x3030
#define VD55G1_REG_FWPATCH_REVISION                     CCI_REG16_LE(0x0012)
#define VD55G1_REG_FWPATCH_START_ADDR                   CCI_REG8(0x2000)
#define VD55G1_REG_SYSTEM_FSM                           CCI_REG8(0x001c)
#define VD55G1_SYSTEM_FSM_READY_TO_BOOT                 0x01
#define VD55G1_SYSTEM_FSM_SW_STBY                       0x02
#define VD55G1_SYSTEM_FSM_STREAMING                     0x03
#define VD55G1_REG_BOOT                                 CCI_REG8(0x0200)
#define VD55G1_BOOT_BOOT                                1
#define VD55G1_BOOT_PATCH_AND_BOOT                      2
#define VD55G1_REG_STBY                                 CCI_REG8(0x0201)
#define VD55G1_STBY_START_STREAM                        1
#define VD55G1_REG_STREAMING                            CCI_REG8(0x0202)
#define VD55G1_STREAMING_STOP_STREAM                    1
#define VD55G1_REG_EXT_CLOCK                            CCI_REG32_LE(0x0220)
#define VD55G1_REG_LINE_LENGTH                          CCI_REG16_LE(0x0300)
#define VD55G1_REG_ORIENTATION                          CCI_REG8(0x0302)
#define VD55G1_REG_FORMAT_CTRL                          CCI_REG8(0x030a)
#define VD55G1_REG_OIF_CTRL                             CCI_REG16_LE(0x030c)
#define VD55G1_REG_ISL_ENABLE                           CCI_REG16_LE(0x326)
#define VD55G1_REG_OIF_IMG_CTRL                         CCI_REG8(0x030f)
#define VD55G1_REG_MIPI_DATA_RATE                       CCI_REG32_LE(0x0224)
#define VD55G1_REG_PATGEN_CTRL                          CCI_REG16_LE(0x0304)
#define VD55G1_PATGEN_TYPE_SHIFT                        4
#define VD55G1_PATGEN_ENABLE                            BIT(0)
#define VD55G1_REG_MANUAL_ANALOG_GAIN                   CCI_REG8(0x0501)
#define VD55G1_REG_MANUAL_COARSE_EXPOSURE               CCI_REG16_LE(0x0502)
#define VD55G1_REG_MANUAL_DIGITAL_GAIN                  CCI_REG16_LE(0x0504)
#define VD55G1_REG_APPLIED_COARSE_EXPOSURE              CCI_REG16_LE(0x00e8)
#define VD55G1_REG_APPLIED_ANALOG_GAIN                  CCI_REG16_LE(0x00ea)
#define VD55G1_REG_APPLIED_DIGITAL_GAIN                 CCI_REG16_LE(0x00ec)
#define VD55G1_REG_AE_FORCE_COLDSTART                   CCI_REG8(0x0308)
#define VD55G1_REG_AE_COLDSTART_EXP_TIME                CCI_REG32_LE(0x0374)
#define VD55G1_REG_READOUT_CTRL                         CCI_REG8(0x052e)
#define VD55G1_READOUT_CTRL_BIN_MODE_NORMAL             0
#define VD55G1_READOUT_CTRL_BIN_MODE_DIGITAL_X2         1
#define VD55G1_REG_DUSTER_CTRL                          CCI_REG8(0x03ae)
#define VD55G1_DUSTER_ENABLE                            BIT(0)
#define VD55G1_DUSTER_DISABLE                           0
#define VD55G1_DUSTER_DYN_ENABLE                        BIT(1)
#define VD55G1_DUSTER_RING_ENABLE                       BIT(4)
#define VD55G1_REG_AE_TARGET_PERCENTAGE                 CCI_REG8(0x0486)
#define VD55G1_REG_NEXT_CTX                             CCI_REG16_LE(0x03e4)
#define VD55G1_REG_EXPOSURE_USE_CASES                   CCI_REG8(0x0312)
#define VD55G1_EXPOSURE_USE_CASES_MULTI_CONTEXT         BIT(2)
#define VD55G1_REG_EXPOSURE_MAX_COARSE                  CCI_REG16_LE(0x0372)
#define VD55G1_EXPOSURE_MAX_COARSE_DEF                  0x7fff
#define VD55G1_EXPOSURE_MAX_COARSE_SUB                  446
#define VD55G1_REG_CTX_REPEAT_COUNT_CTX0                CCI_REG16_LE(0x03dc)
#define VD55G1_REG_CTX_REPEAT_COUNT_CTX1                CCI_REG16_LE(0x03de)

#define VD55G1_REG_EXP_MODE(ctx) \
        CCI_REG8(0x0500 + VD55G1_CTX_OFFSET * (ctx))
#define VD55G1_REG_FRAME_LENGTH(ctx) \
        CCI_REG32_LE(0x050c + VD55G1_CTX_OFFSET * (ctx))
#define VD55G1_REG_X_START(ctx) \
        CCI_REG16_LE(0x0514 + VD55G1_CTX_OFFSET * (ctx))
#define VD55G1_REG_X_WIDTH(ctx) \
        CCI_REG16_LE(0x0516 + VD55G1_CTX_OFFSET * (ctx))
#define VD55G1_REG_Y_START(ctx) \
        CCI_REG16_LE(0x0510 + VD55G1_CTX_OFFSET * (ctx))
#define VD55G1_REG_Y_HEIGHT(ctx) \
        CCI_REG16_LE(0x0512 + VD55G1_CTX_OFFSET * (ctx))
#define VD55G1_REG_GPIO_0_CTRL(ctx) \
        CCI_REG8(0x051d + VD55G1_CTX_OFFSET * (ctx))
#define VD55G1_GPIO_MODE_FSYNC_OUT                      0x00
#define VD55G1_GPIO_MODE_IN                             0x01
#define VD55G1_GPIO_MODE_STROBE                         0x02
#define VD55G1_REG_VT_MODE(ctx) \
        CCI_REG8(0x0536 + VD55G1_CTX_OFFSET * (ctx))
#define VD55G1_VT_MODE_NORMAL                           0
#define VD55G1_VT_MODE_SUBTRACTION                      1
#define VD55G1_REG_MASK_FRAME_CTRL(ctx) \
        CCI_REG8(0x0537 + VD55G1_CTX_OFFSET * (ctx))
#define VD55G1_MASK_FRAME_CTRL_OUTPUT                   0
#define VD55G1_MASK_FRAME_CTRL_MASK                     1
#define VD55G1_REG_EXPOSURE_INSTANCE(ctx) \
        CCI_REG32_LE(0x52D + VD55G1_CTX_OFFSET * (ctx))

#define VD55G1_WIDTH                                    804
#define VD55G1_HEIGHT                                   704
#define VD55G1_MODE_DEF                                 0
#define VD55G1_NB_GPIOS                                 4
#define VD55G1_MBUS_CODE_DEF                            0
#define VD55G1_DGAIN_DEF                                256
#define VD55G1_AGAIN_DEF                                19
#define VD55G1_EXPO_MAX_TERM                            64
#define VD55G1_EXPO_DEF                                 500
#define VD55G1_LINE_LENGTH_MIN                          1128
#define VD55G1_LINE_LENGTH_SUB_MIN                      1344
#define VD55G1_VBLANK_MIN                               86
#define VD55G1_VBLANK_MAX                               0xffff
#define VD55G1_FRAME_LENGTH_DEF                         1860 /* 60 fps */
#define VD55G1_MIPI_MARGIN                              900
#define VD55G1_CTX_OFFSET                               0x50
#define VD55G1_FWPATCH_REVISION_MAJOR                   2
#define VD55G1_FWPATCH_REVISION_MINOR                   9
#define VD55G1_XCLK_FREQ_MIN                            (6 * HZ_PER_MHZ)
#define VD55G1_XCLK_FREQ_MAX                            (27 * HZ_PER_MHZ)
#define VD55G1_MIPI_RATE_MIN                            (250 * MEGA)
#define VD55G1_MIPI_RATE_MAX                            (1200 * MEGA)

#define VD55G1_MODEL_ID_NAME(id) \
        ((id) == VD55G1_MODEL_ID_VD55G1 ? "vd55g1" : "vd65g4")

static const u8 vd55g1_patch_array[] = {
        0x44, 0x03, 0x09, 0x02, 0xe6, 0x01, 0x42, 0x00, 0xea, 0x01, 0x42, 0x00,
        0xf0, 0x01, 0x42, 0x00, 0xe6, 0x01, 0x42, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x4c, 0x00, 0x00, 0xfa, 0x68, 0x40, 0x00, 0xe8,
        0x09, 0xbe, 0x4c, 0x08, 0x00, 0xf2, 0x93, 0xdd, 0x1c, 0x00, 0xc0, 0xe2,
        0x93, 0xdd, 0xc3, 0xc1, 0x0c, 0x04, 0x00, 0xfa, 0x6b, 0x80, 0x98, 0x7f,
        0xfc, 0xef, 0x11, 0xc1, 0x0f, 0x82, 0x69, 0xbe, 0x0f, 0xac, 0x58, 0x40,
        0x00, 0xe8, 0x0c, 0x0c, 0x00, 0xf2, 0x93, 0xdd, 0x1c, 0x00, 0x40, 0xe3,
        0x93, 0xdd, 0xc3, 0xc1, 0x0c, 0x04, 0x84, 0xfa, 0x46, 0x0e, 0xe8, 0xe0,
        0x08, 0xde, 0x4a, 0x40, 0x84, 0xe0, 0xa5, 0x86, 0xa8, 0x7d, 0xfc, 0xef,
        0x6b, 0x80, 0x01, 0xbf, 0x28, 0x77, 0x0c, 0xef, 0x0b, 0x0e, 0x21, 0x78,
        0x06, 0xc0, 0x0b, 0xa5, 0xb5, 0x84, 0x06, 0x42, 0x98, 0xe1, 0x01, 0x81,
        0x01, 0x42, 0x38, 0xe0, 0x0c, 0xc4, 0x0e, 0x84, 0x46, 0x02, 0x84, 0xe0,
        0x0c, 0x84, 0x11, 0x81, 0x21, 0x81, 0x31, 0x81, 0x41, 0x81, 0x51, 0x81,
        0xc1, 0x81, 0x05, 0x83, 0x0c, 0x0c, 0x84, 0xf2, 0x93, 0xdd, 0x06, 0x40,
        0x98, 0xe1, 0xc8, 0x80, 0x58, 0x82, 0x48, 0xc0, 0x38, 0xc2, 0x29, 0x00,
        0x10, 0xe0, 0x19, 0x00, 0x14, 0xe0, 0x09, 0x00, 0x38, 0xe0, 0x5f, 0xb8,
        0x5f, 0xa8, 0x5f, 0xa6, 0x5f, 0xa4, 0x5f, 0xa2, 0x5f, 0xa0, 0x56, 0x41,
        0x98, 0xe1, 0x18, 0x82, 0x28, 0x80, 0x38, 0xc0, 0x5f, 0xa2, 0x19, 0x00,
        0x20, 0xf8, 0x5f, 0xa4, 0x28, 0xc2, 0x5f, 0xa6, 0x39, 0x00, 0x10, 0xe0,
        0x5f, 0xa2, 0x19, 0x00, 0x14, 0xe0, 0x5f, 0xa4, 0x29, 0x00, 0x18, 0xe0,
        0x5f, 0xa6, 0x39, 0x00, 0x40, 0xe0, 0x5f, 0xa2, 0x19, 0x00, 0x44, 0xe0,
        0x5f, 0xa4, 0x29, 0x00, 0x1c, 0xe0, 0x5f, 0xa6, 0x39, 0x00, 0x38, 0xe0,
        0x5f, 0xa2, 0x19, 0x00, 0x20, 0xe0, 0x5f, 0xa4, 0x29, 0x00, 0x24, 0xe0,
        0x5f, 0xa6, 0x39, 0x00, 0x28, 0xe0, 0x5f, 0xa2, 0x19, 0x00, 0x2c, 0xe0,
        0x5f, 0xa4, 0x29, 0x00, 0x30, 0xe0, 0x5f, 0xa6, 0x09, 0x00, 0x34, 0xe0,
        0x5f, 0xa2, 0x5f, 0xa4, 0x5f, 0xa0, 0x4a, 0x0a, 0xfc, 0xfb, 0xe5, 0x82,
        0x08, 0xde, 0x4a, 0x40, 0x88, 0xe0, 0xf6, 0x40, 0x00, 0xe0, 0x01, 0x4e,
        0x99, 0x78, 0x0a, 0xc0, 0x85, 0x80, 0x98, 0x40, 0x00, 0xe8, 0x35, 0x81,
        0xa8, 0x40, 0x00, 0xe8, 0x0b, 0x8c, 0x0c, 0x0c, 0x84, 0xf2, 0xd5, 0xed,
        0x83, 0xc1, 0x13, 0xc5, 0x93, 0xdd, 0xc3, 0xc1, 0x83, 0xc1, 0x13, 0xc3,
        0x93, 0xdd, 0xc3, 0xc1, 0x4c, 0x04, 0x04, 0xfa, 0xc6, 0x0f, 0x94, 0xe0,
        0x19, 0x0e, 0xc9, 0x65, 0x01, 0xc0, 0x28, 0xde, 0x0a, 0x42, 0x80, 0xe0,
        0x24, 0x02, 0x00, 0xfc, 0x16, 0xde, 0xa5, 0x8a, 0x19, 0x00, 0xb8, 0xe0,
        0x10, 0x02, 0x0c, 0xec, 0x1d, 0xe6, 0x14, 0x02, 0x88, 0x80, 0x4e, 0x04,
        0x01, 0x00, 0x10, 0x80, 0x25, 0x02, 0x08, 0x9c, 0x86, 0x02, 0x00, 0x80,
        0x08, 0x44, 0x00, 0x98, 0x55, 0x81, 0x11, 0x85, 0x45, 0x81, 0x11, 0x89,
        0x25, 0x81, 0x11, 0x83, 0x2b, 0x00, 0x24, 0xe0, 0x64, 0xc2, 0x0b, 0x84,
        0x08, 0x51, 0x00, 0xef, 0x2b, 0x80, 0x01, 0x83, 0x1b, 0x8c, 0x38, 0x7d,
        0x5c, 0xef, 0x18, 0xde, 0x0b, 0xa1, 0x25, 0x82, 0x0b, 0x0e, 0x88, 0xf9,
        0x0a, 0x00, 0x00, 0xe8, 0x10, 0x42, 0x04, 0x9c, 0x11, 0x4e, 0x0c, 0x80,
        0x10, 0x40, 0x04, 0xf0, 0x4e, 0x05, 0x01, 0x60, 0x10, 0xc0, 0x06, 0x88,
        0x10, 0x40, 0xf8, 0xf3, 0x06, 0xde, 0x4c, 0x0c, 0x04, 0xf2, 0x93, 0xdd,
        0x0c, 0x04, 0x1c, 0xfe, 0xf6, 0x0f, 0x94, 0xe0, 0x38, 0x9c, 0x46, 0x51,
        0xfc, 0xe0, 0x46, 0x49, 0x38, 0xe2, 0x30, 0x46, 0xf8, 0xf3, 0x36, 0x9c,
        0xc6, 0x46, 0x0c, 0xe1, 0x34, 0x8c, 0x94, 0xa0, 0x4e, 0xa0, 0x39, 0x06,
        0x80, 0xe0, 0x4a, 0x46, 0x94, 0xe0, 0x05, 0x8c, 0x6a, 0x40, 0x80, 0xe0,
        0x2c, 0x0c, 0x00, 0xe2, 0x0b, 0x8c, 0xb8, 0x7c, 0x5c, 0xef, 0x0b, 0x8c,
        0x9e, 0xa0, 0xf8, 0x40, 0x60, 0xef, 0x0b, 0xa1, 0x5a, 0x40, 0x80, 0xe0,
        0x65, 0x88, 0x28, 0x02, 0x01, 0x40, 0x00, 0x80, 0x2a, 0x42, 0x9c, 0xe1,
        0x28, 0x49, 0x60, 0xef, 0x96, 0x4d, 0x9c, 0xe1, 0x01, 0x81, 0x06, 0x98,
        0xd5, 0x81, 0x09, 0x0e, 0xa1, 0x64, 0x01, 0xc0, 0x4a, 0x40, 0x88, 0xe0,
        0x85, 0x80, 0xb8, 0x77, 0xfc, 0xef, 0x35, 0x81, 0xc8, 0x77, 0xfc, 0xef,
        0x08, 0x98, 0x4a, 0x00, 0xfc, 0xfb, 0x55, 0xfc, 0xe8, 0x4a, 0x60, 0xef,
        0x1a, 0x44, 0x9c, 0xe1, 0x35, 0x81, 0x1a, 0x4e, 0x9c, 0xe9, 0x1c, 0x00,
        0x00, 0xe2, 0x0c, 0x0c, 0x1c, 0xf6, 0x93, 0xdd, 0x0d, 0xc3, 0x1a, 0x41,
        0x08, 0xe4, 0x0a, 0x40, 0x84, 0xe1, 0x0c, 0x00, 0x00, 0xe2, 0x93, 0xdd,
        0x4c, 0x04, 0x1c, 0xfa, 0x86, 0x52, 0xec, 0xe1, 0x08, 0xa6, 0x65, 0x12,
        0x24, 0xf8, 0x0e, 0x02, 0x99, 0x7a, 0x00, 0xc0, 0x00, 0x40, 0xa0, 0xf3,
        0x06, 0xa6, 0x0b, 0x8c, 0x08, 0x49, 0x00, 0xef, 0x85, 0x12, 0x28, 0xf8,
        0x02, 0x02, 0xfc, 0xed, 0xf6, 0x47, 0xfd, 0x6f, 0xe0, 0xff, 0x04, 0xe2,
        0x14, 0x04, 0xc0, 0xe0, 0x0f, 0x86, 0x2f, 0xa0, 0x0b, 0x8c, 0x2e, 0xe2,
        0x08, 0x48, 0x00, 0xef, 0x86, 0x02, 0x84, 0xfe, 0x0e, 0x05, 0x09, 0x7d,
        0x00, 0xc0, 0x05, 0x52, 0x08, 0xf8, 0x18, 0x7d, 0xfc, 0xef, 0x4a, 0x40,
        0x80, 0xe0, 0x09, 0x12, 0x04, 0xc0, 0x65, 0x12, 0x20, 0xf8, 0x00, 0x40,
        0x40, 0xdc, 0x01, 0x52, 0x04, 0xc0, 0x0e, 0x00, 0x41, 0x78, 0xf5, 0xc5,
        0x6d, 0xc0, 0xb5, 0x82, 0x05, 0x10, 0x10, 0xe0, 0x11, 0xf1, 0x0f, 0x82,
        0x05, 0x50, 0x10, 0xe0, 0x05, 0x10, 0x10, 0xe0, 0xfe, 0x02, 0xf0, 0xff,
        0x0f, 0x82, 0x85, 0x83, 0x15, 0x10, 0x10, 0xe0, 0x16, 0x00, 0x91, 0x6e,
        0x69, 0xcd, 0x21, 0xf1, 0x6d, 0xc1, 0x01, 0x83, 0x2f, 0x82, 0x26, 0x00,
        0x00, 0x80, 0x2f, 0xa0, 0x25, 0x50, 0x10, 0xe0, 0x05, 0x10, 0x10, 0xe0,
        0x11, 0xa1, 0xfe, 0x04, 0xf0, 0xff, 0x06, 0x42, 0x00, 0x80, 0x0f, 0x84,
        0x0f, 0xa2, 0x05, 0x50, 0x10, 0xe0, 0x16, 0x00, 0x91, 0x6e, 0x69, 0xcd,
        0x6d, 0xc1, 0x71, 0x8d, 0x16, 0x00, 0x79, 0x61, 0x2d, 0xcb, 0x86, 0x0e,
        0x00, 0x80, 0x6d, 0xc1, 0x56, 0x0e, 0x00, 0xc0, 0x0b, 0x8c, 0x1b, 0x8e,
        0x71, 0x52, 0x0c, 0xf8, 0x08, 0x43, 0x00, 0xef, 0x05, 0x52, 0x14, 0xf8,
        0x15, 0x10, 0x28, 0xe0, 0x70, 0x04, 0x04, 0xec, 0x31, 0xe1, 0x29, 0x9e,
        0x1f, 0x86, 0x1f, 0xa4, 0x15, 0x50, 0x28, 0xe0, 0x86, 0x42, 0x3c, 0xe0,
        0x0e, 0x04, 0x9d, 0x64, 0x9b, 0xc2, 0x05, 0x52, 0x1c, 0xf8, 0x78, 0xa6,
        0x48, 0x77, 0xfc, 0xef, 0x4a, 0x40, 0x80, 0xe0, 0x70, 0x4e, 0x10, 0xdc,
        0x1e, 0x00, 0x81, 0x70, 0xeb, 0xcb, 0x70, 0x4e, 0xec, 0x93, 0x6d, 0xc1,
        0x11, 0x85, 0x36, 0x02, 0x00, 0x80, 0x76, 0xa6, 0x11, 0x52, 0x10, 0xf8,
        0x05, 0x10, 0x40, 0xe0, 0xfe, 0x47, 0x0c, 0xff, 0x14, 0x04, 0xa0, 0xe0,
        0x0f, 0x86, 0x0f, 0xa4, 0x05, 0x50, 0x40, 0xe0, 0x05, 0x10, 0x28, 0xe0,
        0xfe, 0x47, 0xfd, 0x7f, 0xe3, 0xff, 0x14, 0x04, 0xd0, 0xe0, 0x0f, 0x86,
        0x2f, 0xa0, 0x20, 0x00, 0x01, 0x6c, 0x00, 0xd0, 0x05, 0x50, 0x28, 0xe0,
        0x0b, 0x8c, 0xf8, 0x7e, 0xfc, 0xee, 0x0e, 0x03, 0x59, 0x78, 0xf5, 0xc5,
        0x0d, 0xc2, 0x05, 0x52, 0x0c, 0xf8, 0x08, 0xa6, 0x46, 0x42, 0xb4, 0xe0,
        0x18, 0x84, 0x00, 0x40, 0xf4, 0x93, 0x00, 0x40, 0x08, 0xdc, 0x1b, 0xa1,
        0x06, 0xa6, 0x05, 0x10, 0x40, 0x80, 0x04, 0x00, 0x50, 0x9c, 0x65, 0x8a,
        0x05, 0x10, 0x44, 0xe0, 0xf6, 0x43, 0xfd, 0x6f, 0x00, 0xf8, 0x0f, 0x82,
        0x06, 0x02, 0x01, 0x60, 0x1e, 0xc0, 0x0f, 0xa2, 0x05, 0x50, 0x44, 0xe0,
        0x05, 0x10, 0x44, 0xe0, 0x0e, 0x02, 0x00, 0xf8, 0x0f, 0x82, 0x09, 0xf6,
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        0x80, 0xfb, 0x2b, 0x8c, 0x68, 0x51, 0x74, 0xef, 0xc5, 0x87, 0x20, 0x44,
        0xe1, 0x73, 0xff, 0xc0, 0x27, 0xc7, 0x23, 0x82, 0x23, 0x52, 0x18, 0xf8,
        0x24, 0x02, 0x80, 0xfb, 0x04, 0x00, 0x80, 0xfb, 0x2b, 0x8c, 0x78, 0x57,
        0x74, 0xef, 0x1b, 0x12, 0x1c, 0xf8, 0x2a, 0xfc, 0x0c, 0xe4, 0x17, 0xc7,
        0x13, 0x84, 0x13, 0x52, 0x1c, 0xf8, 0x0b, 0x12, 0x04, 0xf8, 0x14, 0x02,
        0x80, 0xfb, 0x2b, 0x8c, 0x88, 0x56, 0x74, 0xef, 0xe5, 0x83, 0x20, 0x44,
        0xf1, 0x73, 0xff, 0xc0, 0x27, 0xc5, 0x23, 0x82, 0x23, 0x52, 0x18, 0xf8,
        0x24, 0x02, 0x80, 0xfb, 0x04, 0x00, 0x80, 0xfb, 0x2b, 0x8c, 0x18, 0x52,
        0x74, 0xef, 0x1b, 0x12, 0x1c, 0xf8, 0x2a, 0xfc, 0x0c, 0xe4, 0x17, 0xc5,
        0x13, 0x84, 0x13, 0x52, 0x1c, 0xf8, 0x0b, 0x12, 0x04, 0xf8, 0x14, 0x02,
        0x80, 0xfb, 0x2b, 0x8c, 0x28, 0x51, 0x74, 0xef, 0x7b, 0x80, 0x7c, 0xa4,
        0x08, 0x91, 0xa3, 0x52, 0x1c, 0xe0, 0xa3, 0x52, 0x24, 0xe0, 0x0b, 0xa1,
        0x83, 0x52, 0x1c, 0x80, 0x83, 0x52, 0x24, 0x80, 0x89, 0x12, 0x78, 0xf8,
        0xf6, 0x57, 0xfc, 0xef, 0x6b, 0x12, 0x1c, 0xf8, 0xab, 0x12, 0x18, 0xf8,
        0xd6, 0x57, 0xfc, 0x8f, 0x8b, 0xa3, 0xa0, 0x40, 0x00, 0x9c, 0xa5, 0x86,
        0x64, 0x00, 0x80, 0xfb, 0x1b, 0x90, 0xf8, 0x7d, 0xf8, 0xee, 0x6b, 0x80,
        0xa4, 0x00, 0x80, 0xfb, 0x1b, 0x90, 0x98, 0x7d, 0xf8, 0xee, 0x15, 0x12,
        0x28, 0xf8, 0x19, 0x02, 0xb8, 0xe0, 0x1b, 0xad, 0x95, 0x82, 0x1a, 0xa6,
        0xa0, 0x44, 0xf9, 0x73, 0xff, 0xc0, 0x27, 0xc3, 0x13, 0x94, 0x10, 0x02,
        0x08, 0xec, 0x1c, 0xe4, 0x23, 0x52, 0x18, 0xf8, 0x1b, 0x12, 0x04, 0xf8,
        0x03, 0x96, 0x03, 0x52, 0x28, 0xe0, 0x1c, 0xe6, 0x0a, 0xa6, 0x1a, 0xe4,
        0x63, 0x96, 0x63, 0x52, 0x20, 0xe0, 0x73, 0x52, 0x10, 0xe0, 0x03, 0x52,
        0x14, 0xe0, 0x13, 0x52, 0x18, 0xe0, 0x98, 0x52, 0x74, 0xef, 0x09, 0x12,
        0x8c, 0xe0, 0x0b, 0xa1, 0x01, 0x81, 0x01, 0x52, 0x90, 0xe0, 0x65, 0x82,
        0x05, 0x12, 0x30, 0xf8, 0x09, 0x00, 0xa8, 0xe0, 0x0a, 0x00, 0x0c, 0xf8,
        0x16, 0x00, 0x00, 0xc0, 0x01, 0x52, 0x90, 0xc0, 0x46, 0x41, 0x84, 0xe0,
        0x0a, 0x80, 0x0a, 0x4e, 0x9c, 0xe9, 0x1a, 0x00, 0x08, 0xe0, 0x38, 0x01,
        0x01, 0x20, 0x00, 0xc0, 0x0b, 0x12, 0x1c, 0xe0, 0x1b, 0x12, 0x24, 0xe0,
        0x2b, 0x12, 0x28, 0xe0, 0x03, 0x52, 0x2c, 0xe0, 0x0b, 0x12, 0x20, 0xe0,
        0x13, 0x52, 0x34, 0xe0, 0x23, 0x52, 0x38, 0xe0, 0x03, 0x52, 0x30, 0xe0,
        0x0c, 0x00, 0x00, 0xe2, 0xf1, 0x98, 0x0c, 0x0c, 0x7c, 0xf2, 0x93, 0xdd,
        0x13, 0xa9, 0x00, 0x00, 0xa8, 0xc1, 0x40, 0x00, 0x68, 0x04, 0xa0, 0xe0,
        0x40, 0x6c, 0x40, 0x00, 0xe8, 0x34, 0xc8, 0xe0, 0xfc, 0x91, 0x40, 0x00,
        0x68, 0x1f, 0xb8, 0xe0, 0x30, 0x16, 0x41, 0x00, 0x28, 0x39, 0x74, 0xe0,
        0xb0, 0x7e, 0x40, 0x00, 0xe8, 0x38, 0xc0, 0xe0, 0x30, 0x04, 0x41, 0x00,
        0x48, 0x1b, 0x80, 0xe0, 0x30, 0x2e, 0x40, 0x00, 0x88, 0x0c, 0xec, 0xe0,
        0x10, 0x9f, 0x40, 0x00, 0x88, 0x08, 0xb4, 0xe0, 0x10, 0x01, 0x41, 0x00,
        0x68, 0x01, 0x84, 0xe0, 0x54, 0xd6, 0x40, 0x00, 0xc8, 0x1a, 0x98, 0xe0,
        0xd0, 0xc8, 0x40, 0x00, 0x68, 0x08, 0xa0, 0xe0, 0x80, 0xdb, 0x40, 0x00,
        0xe8, 0x35, 0x94, 0xe0, 0x74, 0xff, 0x40, 0x00, 0xa8, 0x11, 0x80, 0xe0,
        0xf8, 0x89, 0x40, 0x00, 0x88, 0x16, 0xbc, 0xe0, 0x00, 0x90, 0x40, 0x00,
        0x08, 0x35, 0xb8, 0xe0, 0x7c, 0x73, 0x40, 0x00, 0x88, 0x1b, 0xc8, 0xe0,
        0xf4, 0xff, 0x40, 0x00, 0x68, 0x39, 0x80, 0xe0, 0xa4, 0xa4, 0x40, 0x00,
        0xa8, 0x16, 0xb0, 0xe0, 0x50, 0xc9, 0x40, 0x00, 0x28, 0x3a, 0x98, 0xe0,
        0x00, 0xb9, 0x00, 0x00, 0xb6, 0x85, 0x00, 0x00,
};

static const char * const vd55g1_tp_menu[] = {
        "Disabled",
        "Diagonal Grey Scale",
        "Pseudo-random Noise",
};

static const s64 vd55g1_ev_bias_menu[] = {
        -3000, -2500, -2000, -1500, -1000, -500,
            0,
          500,  1000,  1500,  2000,  2500, 3000,
};

static const char * const vd55g1_hdr_menu[] = {
        "No HDR",
        /*
         * This mode acquires 2 frames on the sensor, the first one is ditched
         * out and only used for auto exposure data, the second one is output to
         * the host
         */
        "Internal subtraction",
};

static const char * const vd55g1_supply_name[] = {
        "vcore",
        "vddio",
        "vana",
};

enum vd55g1_hdr_mode {
        VD55G1_NO_HDR,
        VD55G1_HDR_SUB,
};

struct vd55g1_mode {
        u32 width;
        u32 height;
};

static const u32 vd55g1_mbus_formats_mono[] = {
        MEDIA_BUS_FMT_Y8_1X8,
        MEDIA_BUS_FMT_Y10_1X10,
};

/* Format order is : no flip, hflip, vflip, both */
static const u32 vd55g1_mbus_formats_bayer[][4] = {
        {
                MEDIA_BUS_FMT_SRGGB8_1X8,
                MEDIA_BUS_FMT_SGRBG8_1X8,
                MEDIA_BUS_FMT_SGBRG8_1X8,
                MEDIA_BUS_FMT_SBGGR8_1X8,
        },
        {
                MEDIA_BUS_FMT_SRGGB10_1X10,
                MEDIA_BUS_FMT_SGRBG10_1X10,
                MEDIA_BUS_FMT_SGBRG10_1X10,
                MEDIA_BUS_FMT_SBGGR10_1X10,
        },
};

static const struct vd55g1_mode vd55g1_supported_modes[] = {
        {
                .width = VD55G1_WIDTH,
                .height = VD55G1_HEIGHT,
        },
        {
                .width = 800,
                .height = VD55G1_HEIGHT,
        },
        {
                .width = 800,
                .height = 600,
        },
        {
                .width = 640,
                .height = 480,
        },
        {
                .width = 320,
                .height = 240,
        },
};

enum vd55g1_expo_state {
        VD55G1_EXP_AUTO,
        VD55G1_EXP_FREEZE,
        VD55G1_EXP_MANUAL,
        VD55G1_EXP_SINGLE_STEP,
        VD55G1_EXP_BYPASS,
};

struct vd55g1_vblank_limits {
        u16 min;
        u16 def;
        u16 max;
};

struct vd55g1 {
        struct device *dev;
        unsigned int id;
        struct v4l2_subdev sd;
        struct media_pad pad;
        struct regulator_bulk_data supplies[ARRAY_SIZE(vd55g1_supply_name)];
        struct gpio_desc *reset_gpio;
        struct clk *xclk;
        struct regmap *regmap;
        u32 xclk_freq;
        u16 oif_ctrl;
        u8 gpios[VD55G1_NB_GPIOS];
        unsigned long ext_leds_mask;
        u32 mipi_rate;
        u32 pixel_clock;
        u64 link_freq;
        struct v4l2_ctrl_handler ctrl_handler;
        struct v4l2_ctrl *pixel_rate_ctrl;
        struct v4l2_ctrl *vblank_ctrl;
        struct v4l2_ctrl *hblank_ctrl;
        struct {
                struct v4l2_ctrl *hflip_ctrl;
                struct v4l2_ctrl *vflip_ctrl;
        };
        struct v4l2_ctrl *patgen_ctrl;
        struct {
                struct v4l2_ctrl *ae_ctrl;
                struct v4l2_ctrl *expo_ctrl;
                struct v4l2_ctrl *again_ctrl;
                struct v4l2_ctrl *dgain_ctrl;
        };
        struct v4l2_ctrl *ae_lock_ctrl;
        struct v4l2_ctrl *ae_bias_ctrl;
        struct v4l2_ctrl *led_ctrl;
        struct v4l2_ctrl *hdr_ctrl;
};

static inline struct vd55g1 *to_vd55g1(struct v4l2_subdev *sd)
{
        return container_of_const(sd, struct vd55g1, sd);
}

static inline struct vd55g1 *ctrl_to_vd55g1(struct v4l2_ctrl *ctrl)
{
        struct v4l2_subdev *sd = &container_of_const(ctrl->handler,
                                                     struct vd55g1,
                                                     ctrl_handler)->sd;

        return to_vd55g1(sd);
}

static unsigned int vd55g1_get_fmt_bpp(u32 code)
{
        switch (code) {
        case MEDIA_BUS_FMT_Y8_1X8:
        case MEDIA_BUS_FMT_SRGGB8_1X8:
        case MEDIA_BUS_FMT_SGRBG8_1X8:
        case MEDIA_BUS_FMT_SGBRG8_1X8:
        case MEDIA_BUS_FMT_SBGGR8_1X8:
        default:
                return 8;

        case MEDIA_BUS_FMT_Y10_1X10:
        case MEDIA_BUS_FMT_SRGGB10_1X10:
        case MEDIA_BUS_FMT_SGRBG10_1X10:
        case MEDIA_BUS_FMT_SGBRG10_1X10:
        case MEDIA_BUS_FMT_SBGGR10_1X10:
                return 10;
        }
}

static unsigned int vd55g1_get_fmt_data_type(u32 code)
{
        switch (code) {
        case MEDIA_BUS_FMT_Y8_1X8:
        case MEDIA_BUS_FMT_SRGGB8_1X8:
        case MEDIA_BUS_FMT_SGRBG8_1X8:
        case MEDIA_BUS_FMT_SGBRG8_1X8:
        case MEDIA_BUS_FMT_SBGGR8_1X8:
        default:
                return MIPI_CSI2_DT_RAW8;

        case MEDIA_BUS_FMT_Y10_1X10:
        case MEDIA_BUS_FMT_SRGGB10_1X10:
        case MEDIA_BUS_FMT_SGRBG10_1X10:
        case MEDIA_BUS_FMT_SGBRG10_1X10:
        case MEDIA_BUS_FMT_SBGGR10_1X10:
                return MIPI_CSI2_DT_RAW10;
        }
}

static u32 vd55g1_get_fmt_code(struct vd55g1 *sensor, u32 code)
{
        unsigned int i, j;

        if (sensor->id == VD55G1_MODEL_ID_VD55G1)
                return code;

        for (i = 0; i < ARRAY_SIZE(vd55g1_mbus_formats_bayer); i++) {
                for (j = 0; j < ARRAY_SIZE(vd55g1_mbus_formats_bayer[i]); j++) {
                        if (vd55g1_mbus_formats_bayer[i][j] == code)
                                goto adapt_bayer_pattern;
                }
        }
        dev_warn(sensor->dev, "Unsupported mbus format\n");

        return code;

adapt_bayer_pattern:
        j = 0;
        /* In first init_state() call, controls might not be initialized yet */
        if (sensor->hflip_ctrl && sensor->vflip_ctrl) {
                j = (sensor->hflip_ctrl->val ? 1 : 0) +
                        (sensor->vflip_ctrl->val ? 2 : 0);
        }

        return vd55g1_mbus_formats_bayer[i][j];
}

static s32 vd55g1_get_pixel_rate(struct vd55g1 *sensor,
                                 struct v4l2_mbus_framefmt *format)
{
        return sensor->mipi_rate / vd55g1_get_fmt_bpp(format->code);
}

static unsigned int vd55g1_get_hblank_min(struct vd55g1 *sensor,
                                          struct v4l2_mbus_framefmt *format,
                                          struct v4l2_rect *crop)
{
        u32 mipi_req_line_time;
        u32 mipi_req_line_length;
        u32 min_line_length;

        /* MIPI required time */
        mipi_req_line_time = (crop->width *
                              vd55g1_get_fmt_bpp(format->code) +
                              VD55G1_MIPI_MARGIN) /
                              (sensor->mipi_rate / MEGA);
        mipi_req_line_length = mipi_req_line_time * sensor->pixel_clock /
                               HZ_PER_MHZ;

        /* Absolute time required for ADCs to convert pixels */
        min_line_length = VD55G1_LINE_LENGTH_MIN;
        if (sensor->hdr_ctrl->val == VD55G1_HDR_SUB)
                min_line_length = VD55G1_LINE_LENGTH_SUB_MIN;

        /* Respect both constraint */
        min_line_length = max(min_line_length, mipi_req_line_length);

        return min_line_length - crop->width;
}

static void vd55g1_get_vblank_limits(struct vd55g1 *sensor,
                                     struct v4l2_rect *crop,
                                     struct vd55g1_vblank_limits *limits)
{
        limits->min = VD55G1_VBLANK_MIN;
        limits->def = VD55G1_FRAME_LENGTH_DEF - crop->height;
        limits->max = VD55G1_VBLANK_MAX - crop->height;
}

#define vd55g1_read(sensor, reg, val, err) \
        cci_read((sensor)->regmap, reg, val, err)

#define vd55g1_write(sensor, reg, val, err) \
        cci_write((sensor)->regmap, reg, val, err)

static int vd55g1_write_array(struct vd55g1 *sensor, u32 reg, unsigned int len,
                              const u8 *array, int *err)
{
        unsigned int chunk_sz = 1024;
        unsigned int sz;
        int ret = 0;

        if (err && *err)
                return *err;

        /*
         * This loop isn't necessary but in certains conditions (platforms, cpu
         * load, etc.) it has been observed that the bulk write could timeout.
         */
        while (len) {
                sz = min(len, chunk_sz);
                ret = regmap_bulk_write(sensor->regmap, reg, array, sz);
                if (ret < 0)
                        goto out;
                len -= sz;
                reg += sz;
                array += sz;
        }

out:
        if (ret && err)
                *err = ret;

        return ret;
}

static int vd55g1_poll_reg(struct vd55g1 *sensor, u32 reg, u8 poll_val,
                           int *err)
{
        unsigned int val = 0;
        int ret;

        if (err && *err)
                return *err;

        ret = regmap_read_poll_timeout(sensor->regmap, CCI_REG_ADDR(reg), val,
                                       (val == poll_val), 2000,
                                       500 * USEC_PER_MSEC);

        if (ret && err)
                *err = ret;

        return ret;
}

static int vd55g1_wait_state(struct vd55g1 *sensor, int state, int *err)
{
        return vd55g1_poll_reg(sensor, VD55G1_REG_SYSTEM_FSM, state, err);
}

static int vd55g1_prepare_clock_tree(struct vd55g1 *sensor)
{
        u32 sys_clk, mipi_div, pixel_div;

        if (sensor->xclk_freq < VD55G1_XCLK_FREQ_MIN ||
            sensor->xclk_freq > VD55G1_XCLK_FREQ_MAX) {
                dev_err(sensor->dev,
                        "Only %luMhz-%luMhz clock range supported. Provided %lu MHz\n",
                        VD55G1_XCLK_FREQ_MIN / HZ_PER_MHZ,
                        VD55G1_XCLK_FREQ_MAX / HZ_PER_MHZ,
                        sensor->xclk_freq / HZ_PER_MHZ);
                return -EINVAL;
        }

        /* MIPI bus is double data rate */
        sensor->mipi_rate = sensor->link_freq * 2;

        if (sensor->mipi_rate < VD55G1_MIPI_RATE_MIN ||
            sensor->mipi_rate > VD55G1_MIPI_RATE_MAX) {
                dev_err(sensor->dev,
                        "Only %luMbps-%luMbps data rate range supported. Provided %lu Mbps\n",
                        VD55G1_MIPI_RATE_MIN / MEGA,
                        VD55G1_MIPI_RATE_MAX / MEGA,
                        sensor->mipi_rate / MEGA);
                return -EINVAL;
        }

        if (sensor->mipi_rate <= 300 * MEGA)
                mipi_div = 4;
        else if (sensor->mipi_rate <= 600 * MEGA)
                mipi_div = 2;
        else
                mipi_div = 1;

        sys_clk = sensor->mipi_rate * mipi_div;

        if (sys_clk <= 780 * HZ_PER_MHZ)
                pixel_div = 5;
        else if (sys_clk <= 900 * HZ_PER_MHZ)
                pixel_div = 6;
        else
                pixel_div = 8;

        sensor->pixel_clock = sys_clk / pixel_div;

        return 0;
}

static int vd55g1_update_patgen(struct vd55g1 *sensor, u32 patgen_index)
{
        static const u8 index2val[] = {
                0x0, 0x22, 0x28
        };
        u32 pattern = index2val[patgen_index];
        u32 reg = pattern << VD55G1_PATGEN_TYPE_SHIFT;
        u8 duster = VD55G1_DUSTER_RING_ENABLE | VD55G1_DUSTER_DYN_ENABLE |
                    VD55G1_DUSTER_ENABLE;
        int ret = 0;

        BUILD_BUG_ON(ARRAY_SIZE(index2val) != ARRAY_SIZE(vd55g1_tp_menu));

        if (pattern != 0) {
                reg |= VD55G1_PATGEN_ENABLE;
                /* Take care of duster to not mess up the test pattern output */
                duster = VD55G1_DUSTER_DISABLE;
        }

        vd55g1_write(sensor, VD55G1_REG_DUSTER_CTRL, duster, &ret);
        vd55g1_write(sensor, VD55G1_REG_PATGEN_CTRL, reg, &ret);

        return ret;
}

static int vd55g1_update_expo_cluster(struct vd55g1 *sensor, bool is_auto)
{
        enum vd55g1_expo_state expo_state = is_auto ? VD55G1_EXP_AUTO :
                                                      VD55G1_EXP_MANUAL;
        int ret = 0;

        if (sensor->ae_ctrl->is_new)
                vd55g1_write(sensor, VD55G1_REG_EXP_MODE(0), expo_state, &ret);

        if (sensor->hdr_ctrl->val == VD55G1_HDR_SUB &&
            sensor->hdr_ctrl->is_new) {
                vd55g1_write(sensor, VD55G1_REG_EXP_MODE(1), VD55G1_EXP_BYPASS,
                             &ret);
                if (ret)
                        return ret;
        }

        if (!is_auto && sensor->expo_ctrl->is_new)
                vd55g1_write(sensor, VD55G1_REG_MANUAL_COARSE_EXPOSURE,
                             sensor->expo_ctrl->val, &ret);

        if (!is_auto && sensor->again_ctrl->is_new)
                vd55g1_write(sensor, VD55G1_REG_MANUAL_ANALOG_GAIN,
                             sensor->again_ctrl->val, &ret);

        if (!is_auto && sensor->dgain_ctrl->is_new)
                vd55g1_write(sensor, VD55G1_REG_MANUAL_DIGITAL_GAIN,
                             sensor->dgain_ctrl->val, &ret);

        return ret;
}

static int vd55g1_lock_exposure(struct vd55g1 *sensor, u32 lock_val)
{
        bool ae_lock = lock_val & V4L2_LOCK_EXPOSURE;
        enum vd55g1_expo_state expo_state = ae_lock ? VD55G1_EXP_FREEZE :
                                                      VD55G1_EXP_AUTO;
        int ret = 0;

        if (sensor->ae_ctrl->val == V4L2_EXPOSURE_AUTO)
                vd55g1_write(sensor, VD55G1_REG_EXP_MODE(0), expo_state, &ret);

        return ret;
}

static int vd55g1_read_expo_cluster(struct vd55g1 *sensor)
{
        u64 exposure = 0;
        u64 again = 0;
        u64 dgain = 0;
        int ret = 0;

        vd55g1_read(sensor, VD55G1_REG_APPLIED_COARSE_EXPOSURE, &exposure,
                    &ret);
        vd55g1_read(sensor, VD55G1_REG_APPLIED_ANALOG_GAIN, &again, &ret);
        vd55g1_read(sensor, VD55G1_REG_APPLIED_DIGITAL_GAIN, &dgain, &ret);
        if (ret)
                return ret;

        sensor->expo_ctrl->cur.val = exposure;
        sensor->again_ctrl->cur.val = again;
        sensor->dgain_ctrl->cur.val = dgain;

        return 0;
}

static int vd55g1_update_frame_length(struct vd55g1 *sensor,
                                      unsigned int frame_length)
{
        int ret = 0;

        if (sensor->hdr_ctrl->val == VD55G1_HDR_SUB)
                vd55g1_write(sensor, VD55G1_REG_FRAME_LENGTH(1), frame_length,
                             &ret);
        vd55g1_write(sensor, VD55G1_REG_FRAME_LENGTH(0), frame_length, &ret);

        return ret;
}

static int vd55g1_update_exposure_target(struct vd55g1 *sensor, int index)
{
        /*
         * Find auto exposure target with: default target exposure * 2^EV
         * Defaut target exposure being 27 for the sensor.
         */
        static const unsigned int index2exposure_target[] = {
                3, 5, 7, 10, 14, 19, 27, 38, 54, 76, 108, 153, 216,
        };
        int exposure_target = index2exposure_target[index];

        return vd55g1_write(sensor, VD55G1_REG_AE_TARGET_PERCENTAGE,
                            exposure_target, NULL);
}

static int vd55g1_apply_cold_start(struct vd55g1 *sensor,
                                   struct v4l2_rect *crop)
{
        /*
         * Cold start register is a single register expressed as exposure time
         * in us. This differ from status registers being a combination of
         * exposure, digital gain, and analog gain, requiring the following
         * format conversion.
         */
        unsigned int line_length = crop->width + sensor->hblank_ctrl->val;
        unsigned int line_time_us = DIV_ROUND_UP(line_length * MEGA,
                                                 sensor->pixel_clock);
        u8 d_gain = DIV_ROUND_CLOSEST(sensor->dgain_ctrl->val, 1 << 8);
        u8 a_gain = DIV_ROUND_CLOSEST(32, (32 - sensor->again_ctrl->val));
        unsigned int expo_us = sensor->expo_ctrl->val * d_gain * a_gain *
                               line_time_us;
        int ret = 0;

        vd55g1_write(sensor, VD55G1_REG_AE_FORCE_COLDSTART, 1, &ret);
        vd55g1_write(sensor, VD55G1_REG_AE_COLDSTART_EXP_TIME, expo_us, &ret);

        return ret;
}

static void vd55g1_update_pad_fmt(struct vd55g1 *sensor,
                                  const struct vd55g1_mode *mode, u32 code,
                                  struct v4l2_mbus_framefmt *fmt)
{
        fmt->code = vd55g1_get_fmt_code(sensor, code);
        fmt->width = mode->width;
        fmt->height = mode->height;
        fmt->colorspace = V4L2_COLORSPACE_RAW;
        fmt->field = V4L2_FIELD_NONE;
        fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
        fmt->quantization = V4L2_QUANTIZATION_DEFAULT;
        fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT;
}

static int vd55g1_update_hdr_mode(struct vd55g1 *sensor)
{
        int ret = 0;

        switch (sensor->hdr_ctrl->val) {
        case VD55G1_NO_HDR:
                vd55g1_write(sensor, VD55G1_REG_EXPOSURE_MAX_COARSE,
                             VD55G1_EXPOSURE_MAX_COARSE_DEF, &ret);
                vd55g1_write(sensor, VD55G1_REG_EXPOSURE_USE_CASES, 0, &ret);
                vd55g1_write(sensor, VD55G1_REG_NEXT_CTX, 0x0, &ret);

                vd55g1_write(sensor, VD55G1_REG_CTX_REPEAT_COUNT_CTX0, 0, &ret);

                vd55g1_write(sensor, VD55G1_REG_VT_MODE(0),
                             VD55G1_VT_MODE_NORMAL, &ret);
                vd55g1_write(sensor, VD55G1_REG_MASK_FRAME_CTRL(0),
                             VD55G1_MASK_FRAME_CTRL_OUTPUT, &ret);
                break;
        case VD55G1_HDR_SUB:
                vd55g1_write(sensor, VD55G1_REG_EXPOSURE_MAX_COARSE,
                             VD55G1_EXPOSURE_MAX_COARSE_SUB, &ret);
                vd55g1_write(sensor, VD55G1_REG_EXPOSURE_USE_CASES,
                             VD55G1_EXPOSURE_USE_CASES_MULTI_CONTEXT, &ret);
                vd55g1_write(sensor, VD55G1_REG_NEXT_CTX, 0x0001, &ret);

                vd55g1_write(sensor, VD55G1_REG_CTX_REPEAT_COUNT_CTX0, 1, &ret);
                vd55g1_write(sensor, VD55G1_REG_CTX_REPEAT_COUNT_CTX1, 1, &ret);

                vd55g1_write(sensor, VD55G1_REG_VT_MODE(0),
                             VD55G1_VT_MODE_NORMAL, &ret);
                vd55g1_write(sensor, VD55G1_REG_MASK_FRAME_CTRL(0),
                             VD55G1_MASK_FRAME_CTRL_MASK, &ret);
                vd55g1_write(sensor, VD55G1_REG_EXPOSURE_INSTANCE(0), 0, &ret);
                vd55g1_write(sensor, VD55G1_REG_VT_MODE(1),
                             VD55G1_VT_MODE_SUBTRACTION, &ret);
                vd55g1_write(sensor, VD55G1_REG_MASK_FRAME_CTRL(1),
                             VD55G1_MASK_FRAME_CTRL_OUTPUT, &ret);
                vd55g1_write(sensor, VD55G1_REG_EXPOSURE_INSTANCE(1), 1, &ret);
                break;
        default:
                ret = -EINVAL;
        }

        return ret;
}

static int vd55g1_set_framefmt(struct vd55g1 *sensor,
                               struct v4l2_mbus_framefmt *format,
                               struct v4l2_rect *crop)
{
        u8 binning;
        int ret = 0;

        vd55g1_write(sensor, VD55G1_REG_FORMAT_CTRL,
                     vd55g1_get_fmt_bpp(format->code), &ret);
        vd55g1_write(sensor, VD55G1_REG_OIF_IMG_CTRL,
                     vd55g1_get_fmt_data_type(format->code), &ret);

        switch (crop->width / format->width) {
        case 1:
        default:
                binning = VD55G1_READOUT_CTRL_BIN_MODE_NORMAL;
                break;
        case 2:
                binning = VD55G1_READOUT_CTRL_BIN_MODE_DIGITAL_X2;
                break;
        }
        vd55g1_write(sensor, VD55G1_REG_READOUT_CTRL, binning, &ret);

        vd55g1_write(sensor, VD55G1_REG_X_START(0), crop->left, &ret);
        vd55g1_write(sensor, VD55G1_REG_X_WIDTH(0), crop->width, &ret);
        vd55g1_write(sensor, VD55G1_REG_Y_START(0), crop->top, &ret);
        vd55g1_write(sensor, VD55G1_REG_Y_HEIGHT(0), crop->height, &ret);

        vd55g1_write(sensor, VD55G1_REG_X_START(1), crop->left, &ret);
        vd55g1_write(sensor, VD55G1_REG_X_WIDTH(1), crop->width, &ret);
        vd55g1_write(sensor, VD55G1_REG_Y_START(1), crop->top, &ret);
        vd55g1_write(sensor, VD55G1_REG_Y_HEIGHT(1), crop->height, &ret);

        return ret;
}

static int vd55g1_update_gpios(struct vd55g1 *sensor, unsigned long gpio_mask)
{
        unsigned long io;
        u8 gpio_val;
        int ret = 0;

        for_each_set_bit(io, &gpio_mask, VD55G1_NB_GPIOS) {
                gpio_val = sensor->gpios[io];

                if (gpio_val == VD55G1_GPIO_MODE_STROBE &&
                    sensor->led_ctrl->val == V4L2_FLASH_LED_MODE_NONE) {
                        gpio_val = VD55G1_GPIO_MODE_IN;
                        if (sensor->hdr_ctrl->val == VD55G1_HDR_SUB) {
                                /* Make its context 1 counterpart strobe too */
                                vd55g1_write(sensor,
                                             VD55G1_REG_GPIO_0_CTRL(1) + io,
                                             gpio_val, &ret);
                        }
                }

                ret = vd55g1_write(sensor, VD55G1_REG_GPIO_0_CTRL(0) + io,
                                   gpio_val, &ret);
        }

        return ret;
}

static int vd55g1_ro_ctrls_setup(struct vd55g1 *sensor, struct v4l2_rect *crop)
{
        return vd55g1_write(sensor, VD55G1_REG_LINE_LENGTH,
                            crop->width + sensor->hblank_ctrl->val, NULL);
}

static void vd55g1_grab_ctrls(struct vd55g1 *sensor, bool enable)
{
        /* These settings cannot change during stream */
        v4l2_ctrl_grab(sensor->hflip_ctrl, enable);
        v4l2_ctrl_grab(sensor->vflip_ctrl, enable);
        v4l2_ctrl_grab(sensor->patgen_ctrl, enable);
        v4l2_ctrl_grab(sensor->hdr_ctrl, enable);
}

static int vd55g1_enable_streams(struct v4l2_subdev *sd,
                                 struct v4l2_subdev_state *state, u32 pad,
                                 u64 streams_mask)
{
        struct vd55g1 *sensor = to_vd55g1(sd);
        struct v4l2_rect *crop =
                v4l2_subdev_state_get_crop(state, 0);
        struct v4l2_mbus_framefmt *format =
                v4l2_subdev_state_get_format(state, 0);
        int ret;

        ret = pm_runtime_resume_and_get(sensor->dev);
        if (ret < 0)
                return ret;

        /* Configure output */
        vd55g1_write(sensor, VD55G1_REG_MIPI_DATA_RATE,
                     sensor->mipi_rate, &ret);
        vd55g1_write(sensor, VD55G1_REG_OIF_CTRL, sensor->oif_ctrl, &ret);
        vd55g1_write(sensor, VD55G1_REG_ISL_ENABLE, 0, &ret);
        if (ret)
                goto err_rpm_put;

        ret = vd55g1_set_framefmt(sensor, format, crop);
        if (ret)
                goto err_rpm_put;

        /* Setup default GPIO values; could be overridden by V4L2 ctrl setup */
        ret = vd55g1_update_gpios(sensor, GENMASK(VD55G1_NB_GPIOS - 1, 0));
        if (ret)
                goto err_rpm_put;

        ret = vd55g1_apply_cold_start(sensor, crop);
        if (ret)
                goto err_rpm_put;

        /* Apply settings from V4L2 ctrls */
        ret = __v4l2_ctrl_handler_setup(&sensor->ctrl_handler);
        if (ret)
                goto err_rpm_put;

        /* Also apply settings from read-only V4L2 ctrls */
        ret = vd55g1_ro_ctrls_setup(sensor, crop);
        if (ret)
                goto err_rpm_put;

        /* Start streaming */
        vd55g1_write(sensor, VD55G1_REG_STBY, VD55G1_STBY_START_STREAM, &ret);
        vd55g1_poll_reg(sensor, VD55G1_REG_STBY, 0, &ret);
        vd55g1_wait_state(sensor, VD55G1_SYSTEM_FSM_STREAMING, &ret);
        if (ret)
                goto err_rpm_put;

        vd55g1_grab_ctrls(sensor, true);

        return 0;

err_rpm_put:
        pm_runtime_put(sensor->dev);
        return -EINVAL;
}

static int vd55g1_disable_streams(struct v4l2_subdev *sd,
                                  struct v4l2_subdev_state *state, u32 pad,
                                  u64 streams_mask)
{
        struct vd55g1 *sensor = to_vd55g1(sd);
        int ret = 0;

        /* Retrieve Expo cluster to enable coldstart of AE */
        ret = vd55g1_read_expo_cluster(sensor);

        vd55g1_write(sensor, VD55G1_REG_STREAMING, VD55G1_STREAMING_STOP_STREAM,
                     &ret);
        vd55g1_poll_reg(sensor, VD55G1_REG_STREAMING, 0, &ret);
        vd55g1_wait_state(sensor, VD55G1_SYSTEM_FSM_SW_STBY, &ret);

        if (ret)
                dev_warn(sensor->dev, "Can't disable stream\n");

        vd55g1_grab_ctrls(sensor, false);

        pm_runtime_put_autosuspend(sensor->dev);

        return ret;
}

static int vd55g1_patch(struct vd55g1 *sensor)
{
        u64 patch;
        int ret = 0;

        /* vd55g1 needs a patch while vd65g4 does not */
        if (sensor->id == VD55G1_MODEL_ID_VD55G1) {
                vd55g1_write_array(sensor, VD55G1_REG_FWPATCH_START_ADDR,
                                   sizeof(vd55g1_patch_array),
                                   vd55g1_patch_array, &ret);
                vd55g1_write(sensor, VD55G1_REG_BOOT,
                             VD55G1_BOOT_PATCH_AND_BOOT, &ret);
                vd55g1_poll_reg(sensor, VD55G1_REG_BOOT, 0, &ret);
                if (ret) {
                        dev_err(sensor->dev, "Failed to apply patch\n");
                        return ret;
                }

                vd55g1_read(sensor, VD55G1_REG_FWPATCH_REVISION, &patch, &ret);
                if (patch != (VD55G1_FWPATCH_REVISION_MAJOR << 8) +
                    VD55G1_FWPATCH_REVISION_MINOR) {
                        dev_err(sensor->dev, "Bad patch version expected %d.%d got %d.%d\n",
                                VD55G1_FWPATCH_REVISION_MAJOR,
                                VD55G1_FWPATCH_REVISION_MINOR,
                                (u8)(patch >> 8), (u8)(patch & 0xff));
                        return -ENODEV;
                }
                dev_dbg(sensor->dev, "patch %d.%d applied\n",
                        (u8)(patch >> 8), (u8)(patch & 0xff));

        } else {
                vd55g1_write(sensor, VD55G1_REG_BOOT, VD55G1_BOOT_BOOT, &ret);
                vd55g1_poll_reg(sensor, VD55G1_REG_BOOT, 0, &ret);
                if (ret) {
                        dev_err(sensor->dev, "Failed to boot\n");
                        return ret;
                }
        }

        ret = vd55g1_wait_state(sensor, VD55G1_SYSTEM_FSM_SW_STBY, NULL);
        if (ret) {
                dev_err(sensor->dev, "Sensor waiting after boot failed\n");
                return ret;
        }

        return 0;
}

static int vd55g1_get_selection(struct v4l2_subdev *sd,
                                struct v4l2_subdev_state *sd_state,
                                struct v4l2_subdev_selection *sel)
{
        const struct v4l2_rect *crop = v4l2_subdev_state_get_crop(sd_state, 0);

        switch (sel->target) {
        case V4L2_SEL_TGT_CROP:
                sel->r = *crop;
                return 0;
        case V4L2_SEL_TGT_NATIVE_SIZE:
        case V4L2_SEL_TGT_CROP_DEFAULT:
        case V4L2_SEL_TGT_CROP_BOUNDS:
                sel->r.top = 0;
                sel->r.left = 0;
                sel->r.width = VD55G1_WIDTH;
                sel->r.height = VD55G1_HEIGHT;
                return 0;
        }

        return -EINVAL;
}

static int vd55g1_enum_mbus_code(struct v4l2_subdev *sd,
                                 struct v4l2_subdev_state *sd_state,
                                 struct v4l2_subdev_mbus_code_enum *code)
{
        struct vd55g1 *sensor = to_vd55g1(sd);
        u32 base_code;

        if (sensor->id == VD55G1_MODEL_ID_VD55G1) {
                if (code->index >= ARRAY_SIZE(vd55g1_mbus_formats_mono))
                        return -EINVAL;
                base_code = vd55g1_mbus_formats_mono[code->index];
        } else {
                if (code->index >= ARRAY_SIZE(vd55g1_mbus_formats_bayer))
                        return -EINVAL;
                base_code = vd55g1_mbus_formats_bayer[code->index][0];
        }
        code->code = vd55g1_get_fmt_code(sensor, base_code);

        return 0;
}

static int vd55g1_new_format_change_controls(struct vd55g1 *sensor,
                                             struct v4l2_mbus_framefmt *format,
                                             struct v4l2_rect *crop)
{
        struct vd55g1_vblank_limits vblank;
        unsigned int hblank;
        unsigned int frame_length = 0;
        unsigned int expo_max;
        int ret;

        /* Reset vblank and frame length to default */
        vd55g1_get_vblank_limits(sensor, crop, &vblank);
        ret = __v4l2_ctrl_modify_range(sensor->vblank_ctrl, vblank.min,
                                       vblank.max, 1, vblank.def);
        if (ret)
                return ret;

        /* Max exposure changes with vblank */
        frame_length = crop->height + sensor->vblank_ctrl->val;
        expo_max = frame_length - VD55G1_EXPO_MAX_TERM;
        ret = __v4l2_ctrl_modify_range(sensor->expo_ctrl, 0, expo_max, 1,
                                       VD55G1_EXPO_DEF);
        if (ret)
                return ret;

        /* Update pixel rate to reflect new bpp */
        ret = __v4l2_ctrl_s_ctrl_int64(sensor->pixel_rate_ctrl,
                                       vd55g1_get_pixel_rate(sensor, format));
        if (ret)
                return ret;

        /* Update hblank according to new width */
        hblank = vd55g1_get_hblank_min(sensor, format, crop);
        ret = __v4l2_ctrl_modify_range(sensor->hblank_ctrl, hblank, hblank, 1,
                                       hblank);

        return ret;
}

static int vd55g1_set_pad_fmt(struct v4l2_subdev *sd,
                              struct v4l2_subdev_state *sd_state,
                              struct v4l2_subdev_format *sd_fmt)
{
        struct vd55g1 *sensor = to_vd55g1(sd);
        const struct vd55g1_mode *new_mode;
        struct v4l2_mbus_framefmt *format;
        struct v4l2_rect pad_crop;
        unsigned int binning;

        new_mode = v4l2_find_nearest_size(vd55g1_supported_modes,
                                          ARRAY_SIZE(vd55g1_supported_modes),
                                          width, height, sd_fmt->format.width,
                                          sd_fmt->format.height);

        vd55g1_update_pad_fmt(sensor, new_mode, sd_fmt->format.code,
                              &sd_fmt->format);

        /*
         * Use binning to maximize the crop rectangle size, and centre it in the
         * sensor.
         */
        binning = min(VD55G1_WIDTH / sd_fmt->format.width,
                      VD55G1_HEIGHT / sd_fmt->format.height);
        binning = min(binning, 2U);
        pad_crop.width = sd_fmt->format.width * binning;
        pad_crop.height = sd_fmt->format.height * binning;
        pad_crop.left = (VD55G1_WIDTH - pad_crop.width) / 2;
        pad_crop.top = (VD55G1_HEIGHT - pad_crop.height) / 2;

        format = v4l2_subdev_state_get_format(sd_state, sd_fmt->pad);

        *format = sd_fmt->format;

        *v4l2_subdev_state_get_crop(sd_state, sd_fmt->pad) = pad_crop;
        if (sd_fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE)
                return vd55g1_new_format_change_controls(sensor,
                                                         &sd_fmt->format,
                                                         &pad_crop);

        return 0;
}

static int vd55g1_init_state(struct v4l2_subdev *sd,
                             struct v4l2_subdev_state *sd_state)
{
        struct vd55g1 *sensor = to_vd55g1(sd);
        struct v4l2_subdev_format fmt = { 0 };
        struct v4l2_subdev_route routes[] = {
                { .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE }
        };
        struct v4l2_subdev_krouting routing = {
            .num_routes = ARRAY_SIZE(routes),
            .routes = routes,
        };
        int ret;

        /* Needed by v4l2_subdev_s_stream_helper(), even with 1 stream only */
        ret = v4l2_subdev_set_routing(sd, sd_state, &routing);
        if (ret)
                return ret;

        vd55g1_update_pad_fmt(sensor, &vd55g1_supported_modes[VD55G1_MODE_DEF],
                              vd55g1_get_fmt_code(sensor, VD55G1_MBUS_CODE_DEF),
                              &fmt.format);

        return vd55g1_set_pad_fmt(sd, sd_state, &fmt);
}

static int vd55g1_enum_frame_size(struct v4l2_subdev *sd,
                                  struct v4l2_subdev_state *sd_state,
                                  struct v4l2_subdev_frame_size_enum *fse)
{
        struct vd55g1 *sensor = to_vd55g1(sd);
        u32 code;

        if (fse->index >= ARRAY_SIZE(vd55g1_supported_modes))
                return -EINVAL;

        code = vd55g1_get_fmt_code(sensor, fse->code);
        if (fse->code != code)
                return -EINVAL;

        fse->min_width = vd55g1_supported_modes[fse->index].width;
        fse->max_width = fse->min_width;
        fse->min_height = vd55g1_supported_modes[fse->index].height;
        fse->max_height = fse->min_height;

        return 0;
}

static const struct v4l2_subdev_internal_ops vd55g1_internal_ops = {
        .init_state = vd55g1_init_state,
};

static const struct v4l2_subdev_pad_ops vd55g1_pad_ops = {
        .enum_mbus_code = vd55g1_enum_mbus_code,
        .get_fmt = v4l2_subdev_get_fmt,
        .set_fmt = vd55g1_set_pad_fmt,
        .get_selection = vd55g1_get_selection,
        .enum_frame_size = vd55g1_enum_frame_size,
        .enable_streams = vd55g1_enable_streams,
        .disable_streams = vd55g1_disable_streams,
};

static const struct v4l2_subdev_video_ops vd55g1_video_ops = {
        .s_stream = v4l2_subdev_s_stream_helper,
};

static const struct v4l2_subdev_ops vd55g1_subdev_ops = {
        .video = &vd55g1_video_ops,
        .pad = &vd55g1_pad_ops,
};

static int vd55g1_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
        struct vd55g1 *sensor = ctrl_to_vd55g1(ctrl);
        int ret = 0;

        /* Interact with HW only when it is powered ON */
        if (!pm_runtime_get_if_in_use(sensor->dev))
                return 0;

        switch (ctrl->id) {
        case V4L2_CID_EXPOSURE_AUTO:
                ret = vd55g1_read_expo_cluster(sensor);
                break;
        default:
                ret = -EINVAL;
                break;
        }

        pm_runtime_put_autosuspend(sensor->dev);

        return ret;
}

static int vd55g1_s_ctrl(struct v4l2_ctrl *ctrl)
{
        struct vd55g1 *sensor = ctrl_to_vd55g1(ctrl);
        unsigned int frame_length = 0;
        unsigned int expo_max;
        struct v4l2_subdev_state *state =
                v4l2_subdev_get_locked_active_state(&sensor->sd);
        struct v4l2_rect *crop =
                v4l2_subdev_state_get_crop(state, 0);
        struct v4l2_mbus_framefmt *format =
                v4l2_subdev_state_get_format(state, 0);
        unsigned int hblank = vd55g1_get_hblank_min(sensor, format, crop);
        bool is_auto = false;
        int ret = 0;

        if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
                return 0;

        /* Update controls state, range, etc. whatever the state of the HW */
        switch (ctrl->id) {
        case V4L2_CID_VBLANK:
                frame_length = crop->height + ctrl->val;
                expo_max = frame_length - VD55G1_EXPO_MAX_TERM;
                ret = __v4l2_ctrl_modify_range(sensor->expo_ctrl, 0, expo_max,
                                               1, VD55G1_EXPO_DEF);
                break;
        case V4L2_CID_EXPOSURE_AUTO:
                is_auto = (ctrl->val == V4L2_EXPOSURE_AUTO);
                __v4l2_ctrl_grab(sensor->ae_lock_ctrl, !is_auto);
                __v4l2_ctrl_grab(sensor->ae_bias_ctrl, !is_auto);
                break;
        case V4L2_CID_HDR_SENSOR_MODE:
                /* Discriminate if the userspace changed the control value */
                if (ctrl->val != ctrl->cur.val) {
                        /* Max horizontal blanking changes with hdr mode */
                        ret = __v4l2_ctrl_modify_range(sensor->hblank_ctrl,
                                                       hblank, hblank, 1,
                                                       hblank);
                }
                break;
        default:
                break;
        }

        /* Don't modify hardware if controls modification failed */
        if (ret)
                return ret;

        /* Interact with HW only when it is powered ON */
        if (!pm_runtime_get_if_in_use(sensor->dev))
                return 0;

        switch (ctrl->id) {
        case V4L2_CID_HFLIP:
                ret = vd55g1_write(sensor, VD55G1_REG_ORIENTATION,
                                   sensor->hflip_ctrl->val |
                                           (sensor->vflip_ctrl->val << 1),
                                   NULL);
                break;
        case V4L2_CID_TEST_PATTERN:
                ret = vd55g1_update_patgen(sensor, ctrl->val);
                break;
        case V4L2_CID_EXPOSURE_AUTO:
                ret = vd55g1_update_expo_cluster(sensor, is_auto);
                break;
        case V4L2_CID_3A_LOCK:
                ret = vd55g1_lock_exposure(sensor, ctrl->val);
                break;
        case V4L2_CID_AUTO_EXPOSURE_BIAS:
                /*
                 * We use auto exposure target percentage register to control
                 * exposure bias for more precision.
                 */
                ret = vd55g1_update_exposure_target(sensor, ctrl->val);
                break;
        case V4L2_CID_VBLANK:
                ret = vd55g1_update_frame_length(sensor, frame_length);
                break;
        case V4L2_CID_FLASH_LED_MODE:
                ret = vd55g1_update_gpios(sensor, sensor->ext_leds_mask);
                break;
        case V4L2_CID_HDR_SENSOR_MODE:
                ret = vd55g1_update_hdr_mode(sensor);
                break;
        default:
                ret = -EINVAL;
                break;
        }

        pm_runtime_put_autosuspend(sensor->dev);

        return ret;
}

static const struct v4l2_ctrl_ops vd55g1_ctrl_ops = {
        .g_volatile_ctrl = vd55g1_g_volatile_ctrl,
        .s_ctrl = vd55g1_s_ctrl,
};

static int vd55g1_init_ctrls(struct vd55g1 *sensor)
{
        const struct v4l2_ctrl_ops *ops = &vd55g1_ctrl_ops;
        struct v4l2_ctrl_handler *hdl = &sensor->ctrl_handler;
        struct v4l2_ctrl *ctrl;
        struct v4l2_fwnode_device_properties fwnode_props;
        struct vd55g1_vblank_limits vblank;
        unsigned int hblank;
        struct v4l2_subdev_state *state =
                v4l2_subdev_lock_and_get_active_state(&sensor->sd);
        struct v4l2_rect *crop =
                v4l2_subdev_state_get_crop(state, 0);
        struct v4l2_mbus_framefmt *format =
                v4l2_subdev_state_get_format(state, 0);
        s32 pixel_rate = vd55g1_get_pixel_rate(sensor, format);
        int ret;

        v4l2_ctrl_handler_init(hdl, 16);

        /* Flip cluster */
        sensor->hflip_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP,
                                               0, 1, 1, 0);
        if (sensor->hflip_ctrl)
                sensor->hflip_ctrl->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
        sensor->vflip_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP,
                                               0, 1, 1, 0);
        if (sensor->vflip_ctrl)
                sensor->vflip_ctrl->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
        v4l2_ctrl_cluster(2, &sensor->hflip_ctrl);

        /* Exposition cluster */
        sensor->ae_ctrl = v4l2_ctrl_new_std_menu(hdl, ops,
                                                 V4L2_CID_EXPOSURE_AUTO, 1,
                                                 ~0x3, V4L2_EXPOSURE_AUTO);
        sensor->again_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_ANALOGUE_GAIN,
                                               0, 0x1c, 1, VD55G1_AGAIN_DEF);
        sensor->dgain_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_DIGITAL_GAIN,
                                               256, 0xffff, 1,
                                               VD55G1_DGAIN_DEF);
        sensor->expo_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE, 0,
                                              VD55G1_FRAME_LENGTH_DEF -
                                              VD55G1_EXPO_MAX_TERM,
                                              1, VD55G1_EXPO_DEF);
        v4l2_ctrl_auto_cluster(4, &sensor->ae_ctrl, V4L2_EXPOSURE_MANUAL, true);

        sensor->patgen_ctrl =
                v4l2_ctrl_new_std_menu_items(hdl, ops, V4L2_CID_TEST_PATTERN,
                                             ARRAY_SIZE(vd55g1_tp_menu) - 1, 0,
                                             0, vd55g1_tp_menu);
        ctrl = v4l2_ctrl_new_int_menu(hdl, ops, V4L2_CID_LINK_FREQ,
                                      0, 0, &sensor->link_freq);
        if (ctrl)
                ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
        sensor->pixel_rate_ctrl = v4l2_ctrl_new_std(hdl, ops,
                                                    V4L2_CID_PIXEL_RATE, 1,
                                                    INT_MAX, 1,
                                                    pixel_rate);
        if (sensor->pixel_rate_ctrl)
                sensor->pixel_rate_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
        sensor->ae_lock_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_3A_LOCK,
                                                 0, 1, 0, 0);
        sensor->ae_bias_ctrl =
                v4l2_ctrl_new_int_menu(hdl, ops,
                                       V4L2_CID_AUTO_EXPOSURE_BIAS,
                                       ARRAY_SIZE(vd55g1_ev_bias_menu) - 1,
                                       ARRAY_SIZE(vd55g1_ev_bias_menu) / 2,
                                       vd55g1_ev_bias_menu);
        sensor->hdr_ctrl =
                v4l2_ctrl_new_std_menu_items(hdl, ops,
                                             V4L2_CID_HDR_SENSOR_MODE,
                                             ARRAY_SIZE(vd55g1_hdr_menu) - 1, 0,
                                             VD55G1_NO_HDR, vd55g1_hdr_menu);
        hblank = vd55g1_get_hblank_min(sensor, format, crop);
        sensor->hblank_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HBLANK,
                                                hblank, hblank, 1, hblank);
        if (sensor->hblank_ctrl)
                sensor->hblank_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
        vd55g1_get_vblank_limits(sensor, crop, &vblank);
        sensor->vblank_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VBLANK,
                                                vblank.min, vblank.max,
                                                1, vblank.def);

        /* Additional controls based on device tree properties */
        if (sensor->ext_leds_mask) {
                sensor->led_ctrl =
                        v4l2_ctrl_new_std_menu(hdl, ops,
                                               V4L2_CID_FLASH_LED_MODE,
                                               V4L2_FLASH_LED_MODE_FLASH, 0,
                                               V4L2_FLASH_LED_MODE_NONE);
        }

        ret = v4l2_fwnode_device_parse(sensor->dev, &fwnode_props);
        if (ret)
                goto free_ctrls;

        ret = v4l2_ctrl_new_fwnode_properties(hdl, ops, &fwnode_props);
        if (ret)
                goto free_ctrls;

        sensor->sd.ctrl_handler = hdl;
        goto unlock_state;

free_ctrls:
        v4l2_ctrl_handler_free(hdl);
unlock_state:
        v4l2_subdev_unlock_state(state);
        return ret;
}

static int vd55g1_detect(struct vd55g1 *sensor)
{
        unsigned int dt_id = (uintptr_t)device_get_match_data(sensor->dev);
        u64 rev, id;
        int ret;

        ret = vd55g1_read(sensor, VD55G1_REG_MODEL_ID, &id, NULL);
        if (ret)
                return ret;

        if (id != VD55G1_MODEL_ID_VD55G1 && id != VD55G1_MODEL_ID_VD65G4) {
                dev_warn(sensor->dev, "Unsupported sensor id 0x%x\n",
                         (u32)id);
                return -ENODEV;
        }
        if (id != dt_id) {
                dev_err(sensor->dev, "Probed sensor %s and device tree definition (%s) mismatch",
                        VD55G1_MODEL_ID_NAME(id), VD55G1_MODEL_ID_NAME(dt_id));
                return -ENODEV;
        }
        sensor->id = id;

        ret = vd55g1_read(sensor, VD55G1_REG_REVISION, &rev, NULL);
        if (ret)
                return ret;

        if ((id == VD55G1_MODEL_ID_VD55G1 && rev != VD55G1_REVISION_CCB) &&
            (id == VD55G1_MODEL_ID_VD65G4 && rev != VD55G1_REVISION_BAYER)) {
                dev_err(sensor->dev, "Unsupported sensor revision 0x%x for sensor %s\n",
                        (u16)rev, VD55G1_MODEL_ID_NAME(id));
                return -ENODEV;
        }

        return 0;
}

static int vd55g1_power_on(struct device *dev)
{
        struct v4l2_subdev *sd = dev_get_drvdata(dev);
        struct vd55g1 *sensor = to_vd55g1(sd);
        int ret;

        ret = regulator_bulk_enable(ARRAY_SIZE(vd55g1_supply_name),
                                    sensor->supplies);
        if (ret) {
                dev_err(dev, "Failed to enable regulators %d\n", ret);
                return ret;
        }

        ret = clk_prepare_enable(sensor->xclk);
        if (ret) {
                dev_err(dev, "Failed to enable clock %d\n", ret);
                goto disable_bulk;
        }

        gpiod_set_value_cansleep(sensor->reset_gpio, 0);
        usleep_range(5000, 10000);
        ret = vd55g1_wait_state(sensor, VD55G1_SYSTEM_FSM_READY_TO_BOOT, NULL);
        if (ret) {
                dev_err(dev, "Sensor reset failed %d\n", ret);
                goto disable_clock;
        }

        ret = vd55g1_detect(sensor);
        if (ret) {
                dev_err(dev, "Sensor detect failed %d\n", ret);
                goto disable_clock;
        }

        /* Setup clock now to advance through system FSM states */
        vd55g1_write(sensor, VD55G1_REG_EXT_CLOCK, sensor->xclk_freq, &ret);

        ret = vd55g1_patch(sensor);
        if (ret) {
                dev_err(dev, "Sensor patch failed %d\n", ret);
                goto disable_clock;
        }

        return 0;

disable_clock:
        gpiod_set_value_cansleep(sensor->reset_gpio, 1);
        clk_disable_unprepare(sensor->xclk);
disable_bulk:
        regulator_bulk_disable(ARRAY_SIZE(vd55g1_supply_name),
                               sensor->supplies);

        return ret;
}

static int vd55g1_power_off(struct device *dev)
{
        struct v4l2_subdev *sd = dev_get_drvdata(dev);
        struct vd55g1 *sensor = to_vd55g1(sd);

        gpiod_set_value_cansleep(sensor->reset_gpio, 1);
        clk_disable_unprepare(sensor->xclk);
        regulator_bulk_disable(ARRAY_SIZE(sensor->supplies), sensor->supplies);

        return 0;
}

static int vd55g1_check_csi_conf(struct vd55g1 *sensor,
                                 struct fwnode_handle *endpoint)
{
        struct v4l2_fwnode_endpoint ep = { .bus_type = V4L2_MBUS_CSI2_DPHY };
        u8 n_lanes;
        int ret;

        ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &ep);
        if (ret)
                return -EINVAL;

        /* Check lanes number */
        n_lanes = ep.bus.mipi_csi2.num_data_lanes;
        if (n_lanes != 1) {
                dev_err(sensor->dev, "Sensor only supports 1 lane, found %d\n",
                        n_lanes);
                ret = -EINVAL;
                goto done;
        }

        /* Clock lane must be first */
        if (ep.bus.mipi_csi2.clock_lane != 0) {
                dev_err(sensor->dev, "Clock lane must be mapped to lane 0\n");
                ret = -EINVAL;
                goto done;
        }

        /* Handle polarities in sensor configuration */
        sensor->oif_ctrl = (ep.bus.mipi_csi2.lane_polarities[0] << 3) |
                           (ep.bus.mipi_csi2.lane_polarities[1] << 6);

        /* Check the link frequency set in device tree */
        if (!ep.nr_of_link_frequencies) {
                dev_err(sensor->dev, "link-frequency property not found in DT\n");
                ret = -EINVAL;
                goto done;
        }
        if (ep.nr_of_link_frequencies != 1) {
                dev_err(sensor->dev, "Multiple link frequencies not supported\n");
                ret = -EINVAL;
                goto done;
        }
        sensor->link_freq = ep.link_frequencies[0];

done:
        v4l2_fwnode_endpoint_free(&ep);

        return ret;
}

static int vd55g1_parse_dt_gpios_array(struct vd55g1 *sensor,
                                       char *prop_name, u32 *array, int *nb)
{
        unsigned int i;
        int ret;

        *nb = device_property_count_u32(sensor->dev, prop_name);
        if (*nb == -EINVAL) {
                /* Property not found */
                *nb = 0;
                return 0;
        }

        ret = device_property_read_u32_array(sensor->dev,
                                             prop_name, array, *nb);
        if (ret) {
                dev_err(sensor->dev, "Failed to read %s prop\n", prop_name);
                return ret;
        }
        for (i = 0; i < *nb;  i++) {
                if (array[i] >= VD55G1_NB_GPIOS) {
                        dev_err(sensor->dev, "Invalid GPIO number %d\n",
                                array[i]);
                        return -EINVAL;
                }
        }

        return 0;
}

static int vd55g1_parse_dt_gpios(struct vd55g1 *sensor)
{
        u32 led_gpios[VD55G1_NB_GPIOS];
        int nb_gpios_leds;
        unsigned int i;
        int ret;

        /* Initialize GPIOs to default */
        for (i = 0; i < VD55G1_NB_GPIOS; i++)
                sensor->gpios[i] = VD55G1_GPIO_MODE_IN;
        sensor->ext_leds_mask = 0;

        /* Take into account optional 'st,leds' output for GPIOs */
        ret = vd55g1_parse_dt_gpios_array(sensor, "st,leds", led_gpios,
                                          &nb_gpios_leds);
        if (ret)
                return ret;

        for (i = 0; i < nb_gpios_leds; i++) {
                sensor->gpios[led_gpios[i]] = VD55G1_GPIO_MODE_STROBE;
                set_bit(led_gpios[i], &sensor->ext_leds_mask);
        }

        return 0;
}

static int vd55g1_parse_dt(struct vd55g1 *sensor)
{
        struct fwnode_handle *endpoint;
        int ret;

        endpoint = fwnode_graph_get_endpoint_by_id(dev_fwnode(sensor->dev),
                                                   0, 0, 0);
        if (!endpoint) {
                dev_err(sensor->dev, "Endpoint node not found\n");
                return -EINVAL;
        }

        ret = vd55g1_check_csi_conf(sensor, endpoint);
        fwnode_handle_put(endpoint);
        if (ret)
                return ret;

        return vd55g1_parse_dt_gpios(sensor);
}

static int vd55g1_subdev_init(struct vd55g1 *sensor)
{
        int ret;

        /* Init sub device */
        sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
        sensor->sd.internal_ops = &vd55g1_internal_ops;

        /* Init source pad */
        sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
        sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
        ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
        if (ret) {
                dev_err(sensor->dev, "Failed to init media entity: %d\n", ret);
                return ret;
        }

        sensor->sd.state_lock = sensor->ctrl_handler.lock;
        ret = v4l2_subdev_init_finalize(&sensor->sd);
        if (ret) {
                dev_err(sensor->dev, "Subdev init error: %d\n", ret);
                goto err_ctrls;
        }

        /*
         * Initialize controls after v4l2_subdev_init_finalize() to make sure
         * active state is set
         */
        ret = vd55g1_init_ctrls(sensor);
        if (ret) {
                dev_err(sensor->dev, "Controls initialization failed %d\n",
                        ret);
                goto err_media;
        }

        return 0;

err_ctrls:
        v4l2_ctrl_handler_free(sensor->sd.ctrl_handler);

err_media:
        media_entity_cleanup(&sensor->sd.entity);
        return ret;
}

static void vd55g1_subdev_cleanup(struct vd55g1 *sensor)
{
        v4l2_async_unregister_subdev(&sensor->sd);
        v4l2_subdev_cleanup(&sensor->sd);
        media_entity_cleanup(&sensor->sd.entity);
        v4l2_ctrl_handler_free(sensor->sd.ctrl_handler);
}

static int vd55g1_get_regulators(struct vd55g1 *sensor)
{
        unsigned int i;

        for (i = 0; i < ARRAY_SIZE(vd55g1_supply_name); i++)
                sensor->supplies[i].supply = vd55g1_supply_name[i];

        return devm_regulator_bulk_get(sensor->dev,
                                       ARRAY_SIZE(vd55g1_supply_name),
                                       sensor->supplies);
}

static int vd55g1_probe(struct i2c_client *client)
{
        struct device *dev = &client->dev;
        struct vd55g1 *sensor;
        int ret;

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

        v4l2_i2c_subdev_init(&sensor->sd, client, &vd55g1_subdev_ops);

        ret = vd55g1_parse_dt(sensor);
        if (ret)
                return dev_err_probe(dev, ret, "Failed to parse Device Tree\n");

        /* Get (and check) resources : power regs, ext clock, reset gpio */
        ret = vd55g1_get_regulators(sensor);
        if (ret)
                return dev_err_probe(dev, ret, "Failed to get regulators\n");

        sensor->xclk = devm_v4l2_sensor_clk_get(dev, NULL);
        if (IS_ERR(sensor->xclk))
                return dev_err_probe(dev, PTR_ERR(sensor->xclk),
                                     "Failed to get xclk\n");

        sensor->xclk_freq = clk_get_rate(sensor->xclk);
        ret = vd55g1_prepare_clock_tree(sensor);
        if (ret)
                return ret;

        sensor->reset_gpio = devm_gpiod_get_optional(dev, "reset",
                                                     GPIOD_OUT_HIGH);
        if (IS_ERR(sensor->reset_gpio))
                return dev_err_probe(dev, PTR_ERR(sensor->reset_gpio),
                                     "Failed to get reset gpio\n");

        sensor->regmap = devm_cci_regmap_init_i2c(client, 16);
        if (IS_ERR(sensor->regmap))
                return dev_err_probe(dev, PTR_ERR(sensor->regmap),
                                     "Failed to init regmap\n");

        /* Detect if sensor is present and if its revision is supported */
        ret = vd55g1_power_on(dev);
        if (ret)
                return ret;

        /* Enable pm_runtime and power off the sensor */
        pm_runtime_set_active(dev);
        pm_runtime_get_noresume(dev);
        pm_runtime_enable(dev);
        pm_runtime_set_autosuspend_delay(dev, 4000);
        pm_runtime_use_autosuspend(dev);
        pm_runtime_put_autosuspend(dev);

        ret = vd55g1_subdev_init(sensor);
        if (ret) {
                dev_err(dev, "V4l2 init failed: %d\n", ret);
                goto err_power_off;
        }

        ret = v4l2_async_register_subdev(&sensor->sd);
        if (ret) {
                dev_err(dev, "async subdev register failed %d\n", ret);
                goto err_subdev;
        }

        return 0;

err_subdev:
        vd55g1_subdev_cleanup(sensor);
err_power_off:
        pm_runtime_disable(dev);
        pm_runtime_put_noidle(dev);
        pm_runtime_dont_use_autosuspend(dev);
        vd55g1_power_off(dev);

        return ret;
}

static void vd55g1_remove(struct i2c_client *client)
{
        struct v4l2_subdev *sd = i2c_get_clientdata(client);
        struct vd55g1 *sensor = to_vd55g1(sd);

        vd55g1_subdev_cleanup(sensor);

        pm_runtime_disable(&client->dev);
        if (!pm_runtime_status_suspended(&client->dev))
                vd55g1_power_off(&client->dev);
        pm_runtime_set_suspended(&client->dev);
        pm_runtime_dont_use_autosuspend(&client->dev);
}

static const struct of_device_id vd55g1_dt_ids[] = {
        { .compatible = "st,vd55g1", .data = (void *)VD55G1_MODEL_ID_VD55G1 },
        { .compatible = "st,vd65g4", .data = (void *)VD55G1_MODEL_ID_VD65G4 },
        { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, vd55g1_dt_ids);

static const struct dev_pm_ops vd55g1_pm_ops = {
        SET_RUNTIME_PM_OPS(vd55g1_power_off, vd55g1_power_on, NULL)
};

static struct i2c_driver vd55g1_i2c_driver = {
        .driver = {
                .name  = "vd55g1",
                .of_match_table = vd55g1_dt_ids,
                .pm = &vd55g1_pm_ops,
        },
        .probe = vd55g1_probe,
        .remove = vd55g1_remove,
};

module_i2c_driver(vd55g1_i2c_driver);

MODULE_AUTHOR("Benjamin Mugnier <benjamin.mugnier@foss.st.com>");
MODULE_AUTHOR("Sylvain Petinot <sylvain.petinot@foss.st.com>");
MODULE_DESCRIPTION("VD55G1 camera subdev driver");
MODULE_LICENSE("GPL");