[PATCH 5/7] media: i2c: st-vd55g: Add generic driver and VD55G0 support

[Peter Marshall <pm@petermarshall.ca>]

Rewrite the existing vd55g1 module supporting ST VD55G1 and VD65G4 to
make it generic for ST VD55G family global-shutter camera sensors.

Registers and supported features differ between sensor generations.
Replace the static register addresses and revision-specific branches
with a per-chip info struct.

Add support for the VD55G0 monochrome camera sensor. The VD55G0 has
a native resolution of 644 x 604 pixels and does not support HDR via
internal subtraction.

Add a quirk limiting exposure duty cycle with strobe illumination
enabled to avoid tripping overcurrent protection.

Special thanks to GitHub user @femito1 (Fernando Rimoli) for testing and helping
with bug fixes.

Signed-off-by: Peter Marshall <pm@petermarshall.ca>
---
 drivers/media/i2c/Kconfig  |   11 +
 drivers/media/i2c/Makefile |    1 +
 drivers/media/i2c/vd55g.c  | 2166 ++++++++++++++++++++++++++++++++++++
 3 files changed, 2178 insertions(+)
 create mode 100644 drivers/media/i2c/vd55g.c

diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 5d173e0ec..b2a39ff4b 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -815,6 +815,17 @@ config VIDEO_T4KA3
 	  To compile this driver as a module, choose M here: the
 	  module will be called t4ka3.
 
+config VIDEO_VD55G
+	tristate "ST VD55G family sensor support"
+	select V4L2_CCI_I2C
+	depends on GPIOLIB
+	help
+	  This is a Video4Linux2 sensor driver for the ST VD55G family
+	  of camera sensors.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called vd55g.
+
 config VIDEO_VD55G1
 	tristate "ST VD55G1 sensor support"
 	select V4L2_CCI_I2C
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index e45359efe..d87b64893 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -164,6 +164,7 @@ obj-$(CONFIG_VIDEO_TW9910) += tw9910.o
 obj-$(CONFIG_VIDEO_UDA1342) += uda1342.o
 obj-$(CONFIG_VIDEO_UPD64031A) += upd64031a.o
 obj-$(CONFIG_VIDEO_UPD64083) += upd64083.o
+obj-$(CONFIG_VIDEO_VD55G) += vd55g.o
 obj-$(CONFIG_VIDEO_VD55G1) += vd55g1.o
 obj-$(CONFIG_VIDEO_VD56G3) += vd56g3.o
 obj-$(CONFIG_VIDEO_VGXY61) += vgxy61.o
diff --git a/drivers/media/i2c/vd55g.c b/drivers/media/i2c/vd55g.c
new file mode 100644
index 000000000..627e2d31f
--- /dev/null
+++ b/drivers/media/i2c/vd55g.c
@@ -0,0 +1,2166 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for VD55G family global shutter sensors
+ *
+ * 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 <linux/firmware.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 VD55G_REG_MODEL_ID CCI_REG32_LE(0x0000)
+#define VD55G_REG_REVISION CCI_REG16_LE(0x0004)
+#define VD55G_REG_FWPATCH_START_ADDR CCI_REG8(0x2000)
+#define VD55G_SYSTEM_FSM_READY_TO_BOOT 0x01
+#define VD55G_SYSTEM_FSM_SW_STBY 0x02
+#define VD55G_SYSTEM_FSM_STREAMING 0x03
+#define VD55G_REG_BOOT CCI_REG8(0x0200)
+#define VD55G_BOOT_BOOT 1
+#define VD55G_BOOT_PATCH 2
+#define VD55G_REG_STBY CCI_REG8(0x0201)
+#define VD55G_STBY_START_STREAM 1
+#define VD55G_REG_STREAMING CCI_REG8(0x0202)
+#define VD55G_STREAMING_STOP_STREAM 1
+#define VD55G_REG_EXT_CLOCK CCI_REG32_LE(0x0220)
+#define VD55G_REG_LINE_LENGTH CCI_REG16_LE(0x0300)
+#define VD55G_REG_ORIENTATION CCI_REG8(0x0302)
+#define VD55G_REG_FORMAT_CTRL CCI_REG8(0x030a)
+#define VD55G_REG_OIF_CTRL CCI_REG16_LE(0x030c)
+#define VD55G_REG_OIF_IMG_CTRL CCI_REG8(0x030f)
+#define VD55G_REG_MIPI_DATA_RATE CCI_REG32_LE(0x0224)
+#define VD55G_PATGEN_TYPE_SHIFT 4
+#define VD55G_PATGEN_ENABLE BIT(0)
+#define VD55G_READOUT_CTRL_BIN_MODE_NORMAL 0
+#define VD55G_READOUT_CTRL_BIN_MODE_DIGITAL_X2 1
+#define VD55G_DUSTER_ENABLE BIT(0)
+#define VD55G_DUSTER_DISABLE 0
+#define VD55G_DUSTER_DYN_ENABLE BIT(1)
+#define VD55G_DUSTER_RING_ENABLE BIT(4)
+#define VD55G1_EXPOSURE_USE_CASES_MULTI_CONTEXT BIT(2)
+#define VD55G1_EXPOSURE_MAX_COARSE_SUB 446
+
+#define VD55G_REG_EXP_MODE(sensor, ctx) \
+	CCI_REG8(vd55g_get_ctx_addr(sensor, REG_CTX_EXP_MODE, ctx))
+#define VD55G_REG_FRAME_LENGTH(sensor, ctx) \
+	CCI_REG32_LE(vd55g_get_ctx_addr(sensor, REG_CTX_FRAME_LENGTH, ctx))
+#define VD55G_REG_X_START(sensor, ctx) \
+	CCI_REG16_LE(vd55g_get_ctx_addr(sensor, REG_CTX_X_START, ctx))
+#define VD55G_REG_X_WIDTH_OR_END(sensor, ctx) \
+	CCI_REG16_LE(vd55g_get_ctx_addr(sensor, REG_CTX_X_WIDTH_OR_END, ctx))
+#define VD55G_REG_Y_START(sensor, ctx) \
+	CCI_REG16_LE(vd55g_get_ctx_addr(sensor, REG_CTX_Y_START, ctx))
+#define VD55G_REG_Y_HEIGHT_OR_END(sensor, ctx) \
+	CCI_REG16_LE(vd55g_get_ctx_addr(sensor, REG_CTX_Y_HEIGHT_OR_END, ctx))
+#define VD55G_REG_GPIO_CTRL(sensor, ctx, led) \
+	CCI_REG8(vd55g_get_ctx_addr(sensor, REG_CTX_GPIO_0_CTRL, ctx) + (led))
+#define VD55G_GPIO_MODE_IN 0x01
+#define VD55G_GPIO_MODE_STROBE 0x02
+#define VD55G_REG_VT_MODE(sensor, ctx) \
+	CCI_REG8(vd55g_get_ctx_addr(sensor, REG_CTX_VT_MODE, ctx))
+#define VD55G1_VT_MODE_NORMAL 0
+#define VD55G1_VT_MODE_SUBTRACTION 1
+#define VD55G_REG_MASK_FRAME_CTRL(sensor, ctx) \
+	CCI_REG8(vd55g_get_ctx_addr(sensor, REG_CTX_MASK_FRAME_CTRL, ctx))
+#define VD55G1_MASK_FRAME_CTRL_OUTPUT 0
+#define VD55G1_MASK_FRAME_CTRL_MASK 1
+#define VD55G_REG_EXPOSURE_INSTANCE(sensor, ctx) \
+	CCI_REG32_LE(vd55g_get_ctx_addr(sensor, REG_CTX_EXPOSURE_INSTANCE, ctx))
+
+#define VD55G0_WIDTH 644
+#define VD55G0_HEIGHT 604
+#define VD55G1_WIDTH 804
+#define VD55G1_HEIGHT 704
+#define VD55G_MODE_DEF 0
+#define VD55G_NB_GPIOS 4
+#define VD55G_MBUS_CODE_DEF 0
+#define VD55G_DGAIN_DEF 256
+#define VD55G_AGAIN_DEF 19
+#define VD55G_EXPO_MAX_TERM 64
+#define VD55G_EXPO_DEF 500
+#define VD55G_LINE_LENGTH_MIN 1200
+#define VD55G1_LINE_LENGTH_SUB_MIN 1344
+#define VD55G_VBLANK_MIN 86
+#define VD55G_VBLANK_MAX 0xffff
+#define VD55G_FRAME_LENGTH_DEF 1860 /* 60 fps */
+#define VD55G_MIPI_MARGIN 900
+#define VD55G_XCLK_FREQ_MIN (6 * HZ_PER_MHZ)
+#define VD55G_XCLK_FREQ_MAX (27 * HZ_PER_MHZ)
+#define VD55G1_MIPI_RATE_MIN (250 * MEGA)
+#define VD55G1_MIPI_RATE_MAX (1200 * MEGA)
+#define VD55G0_MIPI_RATE_MIN (750 * MEGA)
+#define VD55G0_MIPI_RATE_MAX (1200 * MEGA)
+
+static const char *const vd55g_tp_menu[] = {
+	"Disabled",
+	"Diagonal Grey Scale",
+	"Pseudo-random Noise",
+};
+
+static const s64 vd55g_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 vd55g_supply_name[] = {
+	"vcore",
+	"vddio",
+	"vana",
+};
+
+enum vd55g1_hdr_mode {
+	VD55G1_NO_HDR,
+	VD55G1_HDR_SUB,
+};
+
+struct vd55g_mode {
+	u32 width;
+	u32 height;
+};
+
+static const u32 vd55g_mbus_formats_mono[] = {
+	MEDIA_BUS_FMT_Y8_1X8,
+	MEDIA_BUS_FMT_Y10_1X10,
+};
+
+/* Format order is : no flip, hflip, vflip, both */
+static const u32 vd55g_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 vd55g_mode vd55g0_supported_modes[] = {
+	{
+		.width = VD55G0_WIDTH,
+		.height = VD55G0_HEIGHT,
+	},
+	{
+		.width = 640,
+		.height = 600,
+	},
+	{
+		.width = 640,
+		.height = 480,
+	},
+	{
+		.width = 320,
+		.height = 240,
+	},
+};
+
+static const struct vd55g_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 vd55g_expo_state {
+	VD55G1_EXP_AUTO,
+	VD55G1_EXP_FREEZE,
+	VD55G1_EXP_MANUAL,
+	VD55G1_EXP_SINGLE_STEP,
+	VD55G1_EXP_BYPASS,
+};
+
+struct vd55g_vblank_limits {
+	u16 min;
+	u16 def;
+	u16 max;
+};
+
+struct vd55g_frame_timings {
+	u16 frame_length;
+	u16 expo_max;
+};
+
+enum vd55g_reg_id {
+	REG_SYSTEM_FSM,
+	REG_ISL_ENABLE,
+	REG_FWPATCH_REVISION,
+	REG_PATGEN_CTRL,
+	REG_READOUT_CTRL,
+	REG_DUSTER_CTRL,
+	REG_AE_TARGET_PERCENTAGE,
+	REG_MANUAL_ANALOG_GAIN,
+	REG_MANUAL_COARSE_EXPOSURE,
+	REG_MANUAL_DIGITAL_GAIN,
+	REG_APPLIED_COARSE_EXPOSURE,
+	REG_APPLIED_ANALOG_GAIN,
+	REG_APPLIED_DIGITAL_GAIN,
+	REG_AE_FORCE_COLDSTART,
+	REG_AE_COLDSTART_EXPOSURE_US,
+	REG_AE_COLDSTART_COARSE_EXPOSURE,
+	/* HDR-specific */
+	REG_NEXT_CTX,
+	REG_EXPOSURE_USE_CASES,
+	REG_EXPOSURE_MAX_COARSE,
+	REG_CTX_REPEAT_COUNT_CTX0,
+	REG_CTX_REPEAT_COUNT_CTX1,
+
+	/* Context-specific register bases */
+	REG_CTX_STRIDE, /* Not a real register, stores the context bank offset */
+	REG_CTX_REPEAT_COUNT,
+	REG_CTX_EXP_MODE,
+	REG_CTX_FRAME_LENGTH,
+	REG_CTX_X_START,
+	REG_CTX_X_WIDTH_OR_END,
+	REG_CTX_Y_START,
+	REG_CTX_Y_HEIGHT_OR_END,
+	REG_CTX_GPIO_0_CTRL,
+	/* HDR-specific */
+	REG_CTX_VT_MODE,
+	REG_CTX_MASK_FRAME_CTRL,
+	REG_CTX_EXPOSURE_INSTANCE,
+
+	REG_MAX_INDEX /* Keeps track of enum size */
+};
+
+static const int vd55g0_reg_map[REG_MAX_INDEX] = {
+	[REG_SYSTEM_FSM] = CCI_REG8(0x002c),
+	[REG_ISL_ENABLE] = CCI_REG8(0x0329),
+	[REG_FWPATCH_REVISION] = CCI_REG16_LE(0x0022),
+	[REG_PATGEN_CTRL] = CCI_REG16_LE(0x0400),
+	[REG_READOUT_CTRL] = CCI_REG8(0x047a),
+	[REG_DUSTER_CTRL] = CCI_REG8(0x0316),
+	[REG_AE_TARGET_PERCENTAGE] = CCI_REG8(0x0440),
+	[REG_MANUAL_ANALOG_GAIN] = CCI_REG8(0x044d),
+	[REG_MANUAL_COARSE_EXPOSURE] = CCI_REG16_LE(0x044e),
+	[REG_MANUAL_DIGITAL_GAIN] = CCI_REG16_LE(0x0450),
+	[REG_APPLIED_COARSE_EXPOSURE] = CCI_REG16_LE(0x0064),
+	[REG_APPLIED_ANALOG_GAIN] = CCI_REG16_LE(0x0066),
+	[REG_APPLIED_DIGITAL_GAIN] = CCI_REG16_LE(0x0068),
+	[REG_AE_FORCE_COLDSTART] = CCI_REG8(0x042c),
+	[REG_AE_COLDSTART_COARSE_EXPOSURE] = CCI_REG32_LE(0x042e),
+	[REG_NEXT_CTX] = CCI_REG16_LE(0x0478),
+	[REG_EXPOSURE_MAX_COARSE] = CCI_REG16_LE(0x096c),
+	[REG_CTX_REPEAT_COUNT_CTX0] = CCI_REG16_LE(0x0476),
+	[REG_CTX_REPEAT_COUNT_CTX1] = CCI_REG16_LE(0x04a6),
+
+	/* Context properties */
+	[REG_CTX_STRIDE] = 0x30,
+	[REG_CTX_EXP_MODE] = 0x044c,
+	[REG_CTX_FRAME_LENGTH] = 0x0458,
+	[REG_CTX_X_START] = 0x045e,
+	[REG_CTX_X_WIDTH_OR_END] = 0x0460,
+	[REG_CTX_Y_START] = 0x0462,
+	[REG_CTX_Y_HEIGHT_OR_END] = 0x0464,
+	[REG_CTX_GPIO_0_CTRL] = 0x0467,
+};
+
+static const int vd55g1_reg_map[REG_MAX_INDEX] = {
+	[REG_SYSTEM_FSM] = CCI_REG8(0x001c),
+	[REG_ISL_ENABLE] = CCI_REG8(0x0326),
+	[REG_FWPATCH_REVISION] = CCI_REG16_LE(0x0012),
+	[REG_PATGEN_CTRL] = CCI_REG16_LE(0x0304),
+	[REG_READOUT_CTRL] = CCI_REG8(0x057e),
+	[REG_DUSTER_CTRL] = CCI_REG8(0x03ae),
+	[REG_AE_TARGET_PERCENTAGE] = CCI_REG8(0x0486),
+	[REG_MANUAL_ANALOG_GAIN] = CCI_REG8(0x0501),
+	[REG_MANUAL_COARSE_EXPOSURE] = CCI_REG16_LE(0x0502),
+	[REG_MANUAL_DIGITAL_GAIN] = CCI_REG16_LE(0x0504),
+	[REG_APPLIED_COARSE_EXPOSURE] = CCI_REG16_LE(0x00e8),
+	[REG_APPLIED_ANALOG_GAIN] = CCI_REG16_LE(0x00ea),
+	[REG_APPLIED_DIGITAL_GAIN] = CCI_REG16_LE(0x00ec),
+	[REG_AE_FORCE_COLDSTART] = CCI_REG8(0x0308),
+	[REG_AE_COLDSTART_EXPOSURE_US] = CCI_REG32_LE(0x0374),
+	[REG_NEXT_CTX] = CCI_REG16_LE(0x03e4),
+	[REG_EXPOSURE_USE_CASES] = CCI_REG8(0x0312),
+	[REG_EXPOSURE_MAX_COARSE] = CCI_REG16_LE(0x0372),
+	[REG_CTX_REPEAT_COUNT_CTX0] = CCI_REG16_LE(0x03dc),
+	[REG_CTX_REPEAT_COUNT_CTX1] = CCI_REG16_LE(0x03de),
+
+	/* Context properties */
+	[REG_CTX_STRIDE] = 0x50,
+	[REG_CTX_EXP_MODE] = 0x0500,
+	[REG_CTX_FRAME_LENGTH] = 0x050c,
+	[REG_CTX_X_START] = 0x0514,
+	[REG_CTX_X_WIDTH_OR_END] = 0x0516,
+	[REG_CTX_Y_START] = 0x0510,
+	[REG_CTX_Y_HEIGHT_OR_END] = 0x0512,
+	[REG_CTX_GPIO_0_CTRL] = 0x051d,
+	[REG_CTX_VT_MODE] = 0x0536,
+	[REG_CTX_MASK_FRAME_CTRL] = 0x0537,
+	[REG_CTX_EXPOSURE_INSTANCE] = 0x052d,
+};
+
+#include "vd55g-fw.h"
+
+struct vd55g_patch_header {
+	__le16 patch_size;
+	u8 minor;
+	u8 major;
+} __packed;
+
+struct vd55g_fw_revision_map {
+	u64 revision;
+	bool needs_patch;
+	const char *fw_name;
+	const struct firmware *builtin_fw;
+};
+
+struct vd55g_chip_info {
+	unsigned int id;
+	const char *name;
+	const struct vd55g_mode *modes;
+	u16 num_modes;
+	const int *reg_map;
+	const struct vd55g_fw_revision_map *fw_maps;
+	u16 num_fw_maps;
+	bool needs_patch_boot;
+	u32 mipi_rate_min;
+	u32 mipi_rate_max;
+	u16 width;
+	u16 height;
+	bool bayer;
+	bool hdr;
+	bool absolute_endpoints;
+	bool ae_coldstart_exposure_in_us;
+	bool limit_flash_duty_cycle;
+};
+
+static const struct vd55g_fw_revision_map vd55g0_fw_maps[] = {
+	{
+		.revision = 0x1111,
+		.needs_patch = true,
+		.fw_name = "vd55g0-cut1.bin"
+	},
+	{
+		.revision = 0x1120,
+		.needs_patch = true,
+		.fw_name = "vd55g0-cut2.bin"
+	},
+};
+
+static const struct firmware vd55g1_builtin_fw = {
+	.data = vd55g1_patch_array, .size = ARRAY_SIZE(vd55g1_patch_array)
+};
+
+static const struct vd55g_fw_revision_map vd55g1_fw_maps[] = {
+	{
+		.revision = 0x2020,
+		.needs_patch = true,
+		.fw_name = "vd55g1.bin",
+		.builtin_fw = &vd55g1_builtin_fw
+	},
+};
+
+static const struct vd55g_fw_revision_map vd65g4_fw_maps[] = {
+	{ .revision = 0x3030, .needs_patch = false },
+};
+
+static const struct vd55g_chip_info vd55g0_chip_info = {
+	.id = 0x53354730,
+	.name = "vd55g0",
+	.modes = vd55g0_supported_modes,
+	.num_modes = ARRAY_SIZE(vd55g0_supported_modes),
+	.reg_map = vd55g0_reg_map,
+	.fw_maps = vd55g0_fw_maps,
+	.num_fw_maps = ARRAY_SIZE(vd55g0_fw_maps),
+	.needs_patch_boot = true,
+	.mipi_rate_min = VD55G0_MIPI_RATE_MIN,
+	.mipi_rate_max = VD55G0_MIPI_RATE_MAX,
+	.width = VD55G0_WIDTH,
+	.height = VD55G0_HEIGHT,
+	.bayer = false,
+	.hdr = false,
+	.absolute_endpoints = true,
+	.ae_coldstart_exposure_in_us = false,
+	.limit_flash_duty_cycle = true,
+};
+
+static const struct vd55g_chip_info vd55g1_chip_info = {
+	.id = 0x53354731,
+	.name = "vd55g1",
+	.modes = vd55g1_supported_modes,
+	.num_modes = ARRAY_SIZE(vd55g1_supported_modes),
+	.reg_map = vd55g1_reg_map,
+	.fw_maps = vd55g1_fw_maps,
+	.num_fw_maps = ARRAY_SIZE(vd55g1_fw_maps),
+	.needs_patch_boot = false,
+	.mipi_rate_min = VD55G1_MIPI_RATE_MIN,
+	.mipi_rate_max = VD55G1_MIPI_RATE_MAX,
+	.width = VD55G1_WIDTH,
+	.height = VD55G1_HEIGHT,
+	.bayer = false,
+	.hdr = true,
+	.absolute_endpoints = false,
+	.ae_coldstart_exposure_in_us = true,
+	.limit_flash_duty_cycle = false,
+};
+
+static const struct vd55g_chip_info vd65g4_chip_info = {
+	.id = 0x53354733,
+	.name = "vd65g4",
+	.modes = vd55g1_supported_modes,
+	.num_modes = ARRAY_SIZE(vd55g1_supported_modes),
+	.reg_map = vd55g1_reg_map,
+	.fw_maps = vd65g4_fw_maps,
+	.num_fw_maps = ARRAY_SIZE(vd65g4_fw_maps),
+	.width = VD55G1_WIDTH,
+	.height = VD55G1_HEIGHT,
+	.bayer = true,
+	.hdr = true,
+	.absolute_endpoints = false,
+	.ae_coldstart_exposure_in_us = true,
+	.limit_flash_duty_cycle = false,
+};
+
+struct vd55g {
+	struct device *dev;
+	struct v4l2_subdev sd;
+	struct media_pad pad;
+	struct regulator_bulk_data supplies[ARRAY_SIZE(vd55g_supply_name)];
+	struct gpio_desc *reset_gpio;
+	struct clk *xclk;
+	struct regmap *regmap;
+	const struct vd55g_chip_info *info;
+	u32 xclk_freq;
+	u16 oif_ctrl;
+	u8 gpios[VD55G_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 vd55g *to_vd55g(struct v4l2_subdev *sd)
+{
+	return container_of_const(sd, struct vd55g, sd);
+}
+
+static inline struct vd55g *ctrl_to_vd55g(struct v4l2_ctrl *ctrl)
+{
+	struct v4l2_subdev *sd =
+		&container_of_const(ctrl->handler, struct vd55g, ctrl_handler)
+			 ->sd;
+
+	return to_vd55g(sd);
+}
+
+static inline int vd55g_get_ctx_addr(struct vd55g *sensor,
+				     enum vd55g_reg_id reg, u8 ctx)
+{
+	u16 base_addr = sensor->info->reg_map[reg];
+	u16 stride = sensor->info->reg_map[REG_CTX_STRIDE];
+
+	return base_addr + (stride * ctx);
+}
+
+static unsigned int vd55g_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 vd55g_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 vd55g_get_fmt_code(struct vd55g *sensor, u32 code)
+{
+	unsigned int i, j;
+
+	if (!sensor->info->bayer)
+		return code;
+
+	for (i = 0; i < ARRAY_SIZE(vd55g_mbus_formats_bayer); i++) {
+		for (j = 0; j < ARRAY_SIZE(vd55g_mbus_formats_bayer[i]); j++) {
+			if (vd55g_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 vd55g_mbus_formats_bayer[i][j];
+}
+
+static s32 vd55g_get_pixel_rate(struct vd55g *sensor,
+				struct v4l2_mbus_framefmt *format)
+{
+	return sensor->mipi_rate / vd55g_get_fmt_bpp(format->code);
+}
+
+static unsigned int vd55g_get_hblank_min(struct vd55g *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 * vd55g_get_fmt_bpp(format->code) +
+			      VD55G_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 = VD55G_LINE_LENGTH_MIN;
+	if (sensor->info->hdr)
+		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 vd55g_get_vblank_limits(struct vd55g *sensor,
+				    struct v4l2_rect *crop,
+				    struct vd55g_vblank_limits *limits)
+{
+	limits->min = VD55G_VBLANK_MIN;
+	limits->def = VD55G_FRAME_LENGTH_DEF - crop->height;
+	limits->max = VD55G_VBLANK_MAX - crop->height;
+}
+
+static void vd55g_get_frame_timings(struct vd55g *sensor,
+				    struct v4l2_rect *crop,
+				    struct vd55g_frame_timings *timings)
+{
+	timings->frame_length = crop->height + sensor->vblank_ctrl->val;
+
+	timings->expo_max = timings->frame_length - VD55G_EXPO_MAX_TERM;
+
+	if (sensor->info->limit_flash_duty_cycle &&
+	    sensor->led_ctrl->val == V4L2_FLASH_LED_MODE_FLASH) {
+		timings->expo_max = timings->expo_max / 2;
+	}
+}
+
+#define vd55g_read(sensor, reg, val, err) \
+	cci_read((sensor)->regmap, reg, val, err)
+
+#define vd55g_write(sensor, reg, val, err) \
+	cci_write((sensor)->regmap, reg, val, err)
+
+static int vd55g_cci_read(struct vd55g *sensor, enum vd55g_reg_id reg, u64 *val,
+			  int *err)
+{
+	u32 physical_addr;
+
+	if (err && *err)
+		return *err;
+
+	physical_addr = sensor->info->reg_map[reg];
+
+	if (!physical_addr) {
+		dev_err(sensor->dev,
+			"Register %d not supported on this variant\n", reg);
+		if (err)
+			*err = -EOPNOTSUPP;
+		return -EOPNOTSUPP;
+	}
+
+	return cci_read(sensor->regmap, physical_addr, val, err);
+}
+
+static int vd55g_cci_write(struct vd55g *sensor, enum vd55g_reg_id reg, u32 val,
+			   int *err)
+{
+	u32 physical_addr;
+
+	if (err && *err)
+		return *err;
+
+	physical_addr = sensor->info->reg_map[reg];
+
+	if (!physical_addr) {
+		dev_err(sensor->dev,
+			"Register %d not supported on this variant\n", reg);
+		if (err)
+			*err = -EOPNOTSUPP;
+		return -EOPNOTSUPP;
+	}
+
+	return cci_write(sensor->regmap, physical_addr, val, err);
+}
+
+static int vd55g_write_array(struct vd55g *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 vd55g_poll_reg(struct vd55g *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 vd55g_wait_state(struct vd55g *sensor, int state, int *err)
+{
+	u32 reg = sensor->info->reg_map[REG_SYSTEM_FSM];
+
+	return vd55g_poll_reg(sensor, reg, state, err);
+}
+
+static int vd55g_prepare_clock_tree(struct vd55g *sensor)
+{
+	u32 sys_clk, mipi_div, pixel_div;
+
+	if (sensor->xclk_freq < VD55G_XCLK_FREQ_MIN ||
+	    sensor->xclk_freq > VD55G_XCLK_FREQ_MAX) {
+		dev_err(sensor->dev,
+			"Only %luMhz-%luMhz clock range supported. Provided %lu MHz\n",
+			VD55G_XCLK_FREQ_MIN / HZ_PER_MHZ,
+			VD55G_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 < sensor->info->mipi_rate_min ||
+	    sensor->mipi_rate > sensor->info->mipi_rate_max) {
+		dev_err(sensor->dev,
+			"Only %luMbps-%luMbps data rate range supported. Provided %lu Mbps\n",
+			sensor->info->mipi_rate_min / MEGA,
+			sensor->info->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 vd55g_update_patgen(struct vd55g *sensor, u32 patgen_index)
+{
+	static const u8 index2val[] = { 0x0, 0x22, 0x28 };
+	u32 pattern = index2val[patgen_index];
+	u32 reg = pattern << VD55G_PATGEN_TYPE_SHIFT;
+	u8 duster = VD55G_DUSTER_RING_ENABLE | VD55G_DUSTER_DYN_ENABLE |
+		    VD55G_DUSTER_ENABLE;
+	int ret = 0;
+
+	BUILD_BUG_ON(ARRAY_SIZE(index2val) != ARRAY_SIZE(vd55g_tp_menu));
+
+	if (pattern != 0) {
+		reg |= VD55G_PATGEN_ENABLE;
+		/* Take care of duster to not mess up the test pattern output */
+		duster = VD55G_DUSTER_DISABLE;
+	}
+
+	vd55g_cci_write(sensor, REG_DUSTER_CTRL, duster, &ret);
+	vd55g_cci_write(sensor, REG_PATGEN_CTRL, reg, &ret);
+
+	return ret;
+}
+
+static int vd55g_update_expo_cluster(struct vd55g *sensor, bool is_auto)
+{
+	enum vd55g_expo_state expo_state = is_auto ? VD55G1_EXP_AUTO :
+						     VD55G1_EXP_MANUAL;
+	int ret = 0;
+
+	if (sensor->ae_ctrl->is_new) {
+		vd55g_write(sensor, VD55G_REG_EXP_MODE(sensor, 0), expo_state,
+			    &ret);
+		vd55g_cci_write(sensor, REG_EXPOSURE_MAX_COARSE,
+				sensor->expo_ctrl->maximum, &ret);
+	}
+
+	if (sensor->info->hdr) {
+		if (sensor->hdr_ctrl->val == VD55G1_HDR_SUB &&
+		    sensor->hdr_ctrl->is_new) {
+			vd55g_write(sensor, VD55G_REG_EXP_MODE(sensor, 1),
+				    VD55G1_EXP_BYPASS, &ret);
+			if (ret)
+				return ret;
+		}
+	}
+
+	if (!is_auto && sensor->expo_ctrl->is_new)
+		vd55g_cci_write(sensor, REG_MANUAL_COARSE_EXPOSURE,
+				sensor->expo_ctrl->val, &ret);
+
+	if (!is_auto && sensor->again_ctrl->is_new)
+		vd55g_cci_write(sensor, REG_MANUAL_ANALOG_GAIN,
+				sensor->again_ctrl->val, &ret);
+
+	if (!is_auto && sensor->dgain_ctrl->is_new)
+		vd55g_cci_write(sensor, REG_MANUAL_DIGITAL_GAIN,
+				sensor->dgain_ctrl->val, &ret);
+
+	return ret;
+}
+
+static int vd55g_lock_exposure(struct vd55g *sensor, u32 lock_val)
+{
+	bool ae_lock = lock_val & V4L2_LOCK_EXPOSURE;
+	enum vd55g_expo_state expo_state = ae_lock ? VD55G1_EXP_FREEZE :
+						     VD55G1_EXP_AUTO;
+	int ret = 0;
+
+	if (sensor->ae_ctrl->val == V4L2_EXPOSURE_AUTO)
+		vd55g_write(sensor, VD55G_REG_EXP_MODE(sensor, 0), expo_state,
+			    &ret);
+
+	return ret;
+}
+
+static int vd55g_read_expo_cluster(struct vd55g *sensor)
+{
+	u64 exposure = 0;
+	u64 again = 0;
+	u64 dgain = 0;
+	int ret = 0;
+
+	vd55g_cci_read(sensor, REG_APPLIED_COARSE_EXPOSURE, &exposure, &ret);
+	vd55g_cci_read(sensor, REG_APPLIED_ANALOG_GAIN, &again, &ret);
+	vd55g_cci_read(sensor, 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 vd55g_update_frame_length(struct vd55g *sensor,
+				     unsigned int frame_length)
+{
+	int ret = 0;
+
+	if (sensor->info->hdr)
+		if (sensor->hdr_ctrl->val == VD55G1_HDR_SUB)
+			vd55g_write(sensor, VD55G_REG_FRAME_LENGTH(sensor, 1),
+				    frame_length, &ret);
+	vd55g_write(sensor, VD55G_REG_FRAME_LENGTH(sensor, 0), frame_length,
+		    &ret);
+
+	return ret;
+}
+
+static int vd55g_update_exposure_target(struct vd55g *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 vd55g_cci_write(sensor, REG_AE_TARGET_PERCENTAGE,
+			       exposure_target, NULL);
+}
+
+static int vd55g_apply_cold_start(struct vd55g *sensor, struct v4l2_rect *crop)
+{
+	int ret;
+
+	if (sensor->info->ae_coldstart_exposure_in_us) {
+		/*
+		 * 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;
+		vd55g_cci_write(sensor, REG_AE_COLDSTART_EXPOSURE_US, expo_us,
+				&ret);
+	} else {
+		vd55g_cci_write(sensor, REG_AE_COLDSTART_COARSE_EXPOSURE,
+				sensor->expo_ctrl->val, &ret);
+	}
+
+	vd55g_cci_write(sensor, REG_AE_FORCE_COLDSTART, 1, &ret);
+
+	return ret;
+}
+
+static void vd55g_update_pad_fmt(struct vd55g *sensor,
+				 const struct vd55g_mode *mode, u32 code,
+				 struct v4l2_mbus_framefmt *fmt)
+{
+	fmt->code = vd55g_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 vd55g_update_hdr_mode(struct vd55g *sensor)
+{
+	int ret = 0;
+
+	if (!sensor->info->hdr)
+		return -EINVAL;
+
+	switch (sensor->hdr_ctrl->val) {
+	case VD55G1_NO_HDR:
+		vd55g_cci_write(sensor, REG_EXPOSURE_MAX_COARSE,
+				sensor->expo_ctrl->maximum, &ret);
+		vd55g_cci_write(sensor, REG_EXPOSURE_USE_CASES, 0, &ret);
+		vd55g_cci_write(sensor, REG_NEXT_CTX, 0x0, &ret);
+
+		vd55g_cci_write(sensor, REG_CTX_REPEAT_COUNT_CTX0, 0, &ret);
+
+		vd55g_write(sensor, VD55G_REG_VT_MODE(sensor, 0),
+			    VD55G1_VT_MODE_NORMAL, &ret);
+		vd55g_write(sensor, VD55G_REG_MASK_FRAME_CTRL(sensor, 0),
+			    VD55G1_MASK_FRAME_CTRL_OUTPUT, &ret);
+		break;
+	case VD55G1_HDR_SUB:
+		vd55g_cci_write(sensor, REG_EXPOSURE_MAX_COARSE,
+				VD55G1_EXPOSURE_MAX_COARSE_SUB, &ret);
+		vd55g_cci_write(sensor, REG_EXPOSURE_USE_CASES,
+				VD55G1_EXPOSURE_USE_CASES_MULTI_CONTEXT, &ret);
+		vd55g_cci_write(sensor, REG_NEXT_CTX, 0x0001, &ret);
+
+		vd55g_cci_write(sensor, REG_CTX_REPEAT_COUNT_CTX0, 1, &ret);
+		vd55g_cci_write(sensor, REG_CTX_REPEAT_COUNT_CTX1, 1, &ret);
+
+		vd55g_write(sensor, VD55G_REG_VT_MODE(sensor, 0),
+			    VD55G1_VT_MODE_NORMAL, &ret);
+		vd55g_write(sensor, VD55G_REG_MASK_FRAME_CTRL(sensor, 0),
+			    VD55G1_MASK_FRAME_CTRL_MASK, &ret);
+		vd55g_write(sensor, VD55G_REG_EXPOSURE_INSTANCE(sensor, 0), 0,
+			    &ret);
+		vd55g_write(sensor, VD55G_REG_VT_MODE(sensor, 1),
+			    VD55G1_VT_MODE_SUBTRACTION, &ret);
+		vd55g_write(sensor, VD55G_REG_MASK_FRAME_CTRL(sensor, 1),
+			    VD55G1_MASK_FRAME_CTRL_OUTPUT, &ret);
+		vd55g_write(sensor, VD55G_REG_EXPOSURE_INSTANCE(sensor, 1), 1,
+			    &ret);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int vd55g_set_framefmt(struct vd55g *sensor,
+			      struct v4l2_mbus_framefmt *format,
+			      struct v4l2_rect *crop)
+{
+	u8 binning;
+	int ret = 0;
+	int x_val, y_val;
+
+	vd55g_write(sensor, VD55G_REG_FORMAT_CTRL,
+		    vd55g_get_fmt_bpp(format->code), &ret);
+	vd55g_write(sensor, VD55G_REG_OIF_IMG_CTRL,
+		    vd55g_get_fmt_data_type(format->code), &ret);
+
+	switch (crop->width / format->width) {
+	case 1:
+	default:
+		binning = VD55G_READOUT_CTRL_BIN_MODE_NORMAL;
+		break;
+	case 2:
+		binning = VD55G_READOUT_CTRL_BIN_MODE_DIGITAL_X2;
+		break;
+	}
+	vd55g_cci_write(sensor, REG_READOUT_CTRL, binning, &ret);
+
+	if (sensor->info->absolute_endpoints) {
+		x_val = crop->left + crop->width - 1;
+		y_val = crop->top + crop->height - 1;
+	} else {
+		x_val = crop->width;
+		y_val = crop->height;
+	}
+
+	vd55g_write(sensor, VD55G_REG_X_START(sensor, 0), crop->left, &ret);
+	vd55g_write(sensor, VD55G_REG_X_WIDTH_OR_END(sensor, 0), x_val, &ret);
+	vd55g_write(sensor, VD55G_REG_Y_START(sensor, 0), crop->top, &ret);
+	vd55g_write(sensor, VD55G_REG_Y_HEIGHT_OR_END(sensor, 0), y_val, &ret);
+
+	if (sensor->info->hdr) {
+		vd55g_write(sensor, VD55G_REG_X_START(sensor, 1), crop->left,
+			    &ret);
+		vd55g_write(sensor, VD55G_REG_X_WIDTH_OR_END(sensor, 1), x_val,
+			    &ret);
+		vd55g_write(sensor, VD55G_REG_Y_START(sensor, 1), crop->top,
+			    &ret);
+		vd55g_write(sensor, VD55G_REG_Y_HEIGHT_OR_END(sensor, 1), y_val,
+			    &ret);
+	}
+
+	return ret;
+}
+
+static int vd55g_update_gpios(struct vd55g *sensor, unsigned long gpio_mask)
+{
+	unsigned long io;
+	u8 gpio_val;
+	int ret = 0;
+
+	for_each_set_bit(io, &gpio_mask, VD55G_NB_GPIOS) {
+		gpio_val = sensor->gpios[io];
+
+		if (gpio_val == VD55G_GPIO_MODE_STROBE &&
+		    sensor->led_ctrl->val == V4L2_FLASH_LED_MODE_NONE) {
+			gpio_val = VD55G_GPIO_MODE_IN;
+			if (sensor->info->hdr) {
+				if (sensor->hdr_ctrl->val == VD55G1_HDR_SUB) {
+					/* Make its context 1 counterpart strobe too */
+					vd55g_write(sensor,
+						    VD55G_REG_GPIO_CTRL(sensor,
+									1, io),
+						    gpio_val, &ret);
+				}
+			}
+		}
+
+		ret = vd55g_write(sensor, VD55G_REG_GPIO_CTRL(sensor, 0, io),
+				  gpio_val, &ret);
+	}
+
+	return ret;
+}
+
+static int vd55g_ro_ctrls_setup(struct vd55g *sensor, struct v4l2_rect *crop)
+{
+	return vd55g_write(sensor, VD55G_REG_LINE_LENGTH,
+			   crop->width + sensor->hblank_ctrl->val, NULL);
+}
+
+static void vd55g_grab_ctrls(struct vd55g *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 vd55g_enable_streams(struct v4l2_subdev *sd,
+				struct v4l2_subdev_state *state, u32 pad,
+				u64 streams_mask)
+{
+	struct vd55g *sensor = to_vd55g(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 */
+	vd55g_write(sensor, VD55G_REG_MIPI_DATA_RATE, sensor->mipi_rate, &ret);
+	vd55g_write(sensor, VD55G_REG_OIF_CTRL, sensor->oif_ctrl, &ret);
+	vd55g_cci_write(sensor, REG_ISL_ENABLE, 0, &ret);
+	if (ret)
+		goto err_rpm_put;
+
+	ret = vd55g_set_framefmt(sensor, format, crop);
+	if (ret)
+		goto err_rpm_put;
+
+	/* Setup default GPIO values; could be overridden by V4L2 ctrl setup */
+	ret = vd55g_update_gpios(sensor, GENMASK(VD55G_NB_GPIOS - 1, 0));
+	if (ret)
+		goto err_rpm_put;
+
+	ret = vd55g_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 = vd55g_ro_ctrls_setup(sensor, crop);
+	if (ret)
+		goto err_rpm_put;
+
+	/* Start streaming */
+	vd55g_write(sensor, VD55G_REG_STBY, VD55G_STBY_START_STREAM, &ret);
+	vd55g_poll_reg(sensor, VD55G_REG_STBY, 0, &ret);
+	vd55g_wait_state(sensor, VD55G_SYSTEM_FSM_STREAMING, &ret);
+	if (ret)
+		goto err_rpm_put;
+
+	vd55g_grab_ctrls(sensor, true);
+
+	return 0;
+
+err_rpm_put:
+	pm_runtime_put(sensor->dev);
+	return -EINVAL;
+}
+
+static int vd55g_disable_streams(struct v4l2_subdev *sd,
+				 struct v4l2_subdev_state *state, u32 pad,
+				 u64 streams_mask)
+{
+	struct vd55g *sensor = to_vd55g(sd);
+	int ret = 0;
+
+	/* Retrieve Expo cluster to enable coldstart of AE */
+	ret = vd55g_read_expo_cluster(sensor);
+
+	vd55g_write(sensor, VD55G_REG_STREAMING, VD55G_STREAMING_STOP_STREAM,
+		    &ret);
+	vd55g_poll_reg(sensor, VD55G_REG_STREAMING, 0, &ret);
+	vd55g_wait_state(sensor, VD55G_SYSTEM_FSM_SW_STBY, &ret);
+
+	if (ret)
+		dev_warn(sensor->dev, "Can't disable stream\n");
+
+	vd55g_grab_ctrls(sensor, false);
+
+	pm_runtime_put_autosuspend(sensor->dev);
+
+	return ret;
+}
+
+static int vd55g_load_and_apply_patch(struct vd55g *sensor,
+				      const struct vd55g_fw_revision_map *fw_info)
+{
+	const struct firmware *fw;
+	const struct vd55g_patch_header *hdr;
+	u16 payload_len;
+	u64 hardware_version;
+	int ret;
+
+	ret = request_firmware(&fw, fw_info->fw_name, sensor->dev);
+
+	if (ret == -ENOENT && fw_info->builtin_fw) {
+		dev_info(sensor->dev,
+			 "External firmware %s not found, using built-in defaults\n",
+			 fw_info->fw_name);
+		fw = fw_info->builtin_fw;
+	} else if (ret) {
+		dev_err(sensor->dev,
+			"Failed to load required firmware %s: %d\n",
+			fw_info->fw_name,
+			ret);
+		return ret;
+	}
+
+	if (fw->size < sizeof(*hdr)) {
+		dev_err(sensor->dev,
+			"Patch file is too small to contain a header\n");
+		return -EINVAL;
+	}
+
+	hdr = (const struct vd55g_patch_header *)fw->data;
+	payload_len = le16_to_cpu(hdr->patch_size);
+
+	if (payload_len > fw->size) {
+		dev_err(sensor->dev,
+			"Patch payload length mismatch in header\n");
+		return -EINVAL;
+	}
+
+	vd55g_write_array(sensor, VD55G_REG_FWPATCH_START_ADDR, fw->size,
+			  fw->data, &ret);
+	vd55g_write(sensor, VD55G_REG_BOOT, VD55G_BOOT_PATCH, &ret);
+	vd55g_poll_reg(sensor, VD55G_REG_BOOT, 0, &ret);
+	if (ret) {
+		dev_err(sensor->dev, "Failed to apply patch\n");
+		return ret;
+	}
+
+	ret = vd55g_cci_read(sensor, REG_FWPATCH_REVISION, &hardware_version,
+			     &ret);
+	if (ret)
+		return ret;
+
+	if ((hardware_version & 0xFFFF) != ((hdr->major << 8) | hdr->minor)) {
+		dev_err(sensor->dev,
+			"Bad patch version expected %d.%d got %d.%d\n",
+			hdr->major, hdr->minor, (u8)(hardware_version >> 8),
+			(u8)(hardware_version & 0xff));
+		return -ENODEV;
+	}
+
+	dev_dbg(sensor->dev, "patch %d.%d applied\n",
+		(u8)(hardware_version >> 8), (u8)(hardware_version & 0xff));
+	return 0;
+}
+
+static int vd55g_get_firmware_name(struct vd55g *sensor, u64 revision,
+				   const struct vd55g_fw_revision_map **fw_info)
+{
+	for (int i = 0; i < sensor->info->num_fw_maps; i++) {
+		const struct vd55g_fw_revision_map *map = &sensor->info->fw_maps[i];
+
+		if (map->revision == revision) {
+			*fw_info = map;
+			return 0;
+		}
+	}
+
+	return -ENOENT;
+}
+
+static int vd55g_boot(struct vd55g *sensor)
+{
+	int ret = 0;
+	u64 rev;
+	const struct vd55g_fw_revision_map *fw_info;
+
+	ret = vd55g_read(sensor, VD55G_REG_REVISION, &rev, NULL);
+	if (ret)
+		return ret;
+
+	ret = vd55g_get_firmware_name(sensor, rev, &fw_info);
+	if (ret == -ENOENT) {
+		dev_err(sensor->dev,
+			"Unsupported sensor revision 0x%x for sensor %s\n",
+			(u16)rev, sensor->info->name);
+		return -ENODEV;
+	}
+
+	if (fw_info->needs_patch)
+		vd55g_load_and_apply_patch(sensor, fw_info);
+
+	if (!fw_info->needs_patch || sensor->info->needs_patch_boot) {
+		vd55g_write(sensor, VD55G_REG_BOOT, VD55G_BOOT_BOOT, &ret);
+		vd55g_poll_reg(sensor, VD55G_REG_BOOT, 0, &ret);
+		if (ret) {
+			dev_err(sensor->dev, "Failed to boot\n");
+			return ret;
+		}
+	}
+
+	ret = vd55g_wait_state(sensor, VD55G_SYSTEM_FSM_SW_STBY, NULL);
+	if (ret) {
+		dev_err(sensor->dev, "Sensor waiting after boot failed\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int vd55g_get_selection(struct v4l2_subdev *sd,
+			       struct v4l2_subdev_state *sd_state,
+			       struct v4l2_subdev_selection *sel)
+{
+	struct vd55g *sensor = to_vd55g(sd);
+	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 = sensor->info->width;
+		sel->r.height = sensor->info->height;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+static int vd55g_enum_mbus_code(struct v4l2_subdev *sd,
+				struct v4l2_subdev_state *sd_state,
+				struct v4l2_subdev_mbus_code_enum *code)
+{
+	struct vd55g *sensor = to_vd55g(sd);
+	u32 base_code;
+
+	if (!sensor->info->bayer) {
+		if (code->index >= ARRAY_SIZE(vd55g_mbus_formats_mono))
+			return -EINVAL;
+		base_code = vd55g_mbus_formats_mono[code->index];
+	} else {
+		if (code->index >= ARRAY_SIZE(vd55g_mbus_formats_bayer))
+			return -EINVAL;
+		base_code = vd55g_mbus_formats_bayer[code->index][0];
+	}
+	code->code = vd55g_get_fmt_code(sensor, base_code);
+
+	return 0;
+}
+
+static int vd55g_new_format_change_controls(struct vd55g *sensor,
+					    struct v4l2_mbus_framefmt *format,
+					    struct v4l2_rect *crop)
+{
+	struct vd55g_vblank_limits vblank;
+	struct vd55g_frame_timings timings;
+	unsigned int hblank;
+	int ret;
+
+	/* Reset vblank and frame length to default */
+	vd55g_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 */
+	vd55g_get_frame_timings(sensor, crop, &timings);
+	ret = __v4l2_ctrl_modify_range(sensor->expo_ctrl, 0, timings.expo_max,
+				       1, VD55G_EXPO_DEF);
+	if (ret)
+		return ret;
+
+	/* Update pixel rate to reflect new bpp */
+	ret = __v4l2_ctrl_s_ctrl_int64(sensor->pixel_rate_ctrl,
+				       vd55g_get_pixel_rate(sensor, format));
+	if (ret)
+		return ret;
+
+	/* Update hblank according to new width */
+	hblank = vd55g_get_hblank_min(sensor, format, crop);
+	ret = __v4l2_ctrl_modify_range(sensor->hblank_ctrl, hblank, hblank, 1,
+				       hblank);
+
+	return ret;
+}
+
+static int vd55g_set_pad_fmt(struct v4l2_subdev *sd,
+			     struct v4l2_subdev_state *sd_state,
+			     struct v4l2_subdev_format *sd_fmt)
+{
+	struct vd55g *sensor = to_vd55g(sd);
+	const struct vd55g_mode *new_mode;
+	struct v4l2_mbus_framefmt *format;
+	struct v4l2_rect pad_crop;
+	unsigned int binning;
+
+	new_mode = v4l2_find_nearest_size(sensor->info->modes,
+					  sensor->info->num_modes, width,
+					  height, sd_fmt->format.width,
+					  sd_fmt->format.height);
+
+	vd55g_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(sensor->info->width / sd_fmt->format.width,
+		      sensor->info->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 = (sensor->info->width - pad_crop.width) / 2;
+	pad_crop.top = (sensor->info->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 vd55g_new_format_change_controls(sensor, &sd_fmt->format,
+							&pad_crop);
+
+	return 0;
+}
+
+static int vd55g_init_state(struct v4l2_subdev *sd,
+			    struct v4l2_subdev_state *sd_state)
+{
+	struct vd55g *sensor = to_vd55g(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;
+
+	vd55g_update_pad_fmt(sensor, &sensor->info->modes[VD55G_MODE_DEF],
+			     vd55g_get_fmt_code(sensor, VD55G_MBUS_CODE_DEF),
+			     &fmt.format);
+
+	return vd55g_set_pad_fmt(sd, sd_state, &fmt);
+}
+
+static int vd55g_enum_frame_size(struct v4l2_subdev *sd,
+				 struct v4l2_subdev_state *sd_state,
+				 struct v4l2_subdev_frame_size_enum *fse)
+{
+	struct vd55g *sensor = to_vd55g(sd);
+	u32 code;
+
+	if (fse->index >= sensor->info->num_modes)
+		return -EINVAL;
+
+	code = vd55g_get_fmt_code(sensor, fse->code);
+	if (fse->code != code)
+		return -EINVAL;
+
+	fse->min_width = sensor->info->modes[fse->index].width;
+	fse->max_width = fse->min_width;
+	fse->min_height = sensor->info->modes[fse->index].height;
+	fse->max_height = fse->min_height;
+
+	return 0;
+}
+
+static const struct v4l2_subdev_internal_ops vd55g_internal_ops = {
+	.init_state = vd55g_init_state,
+};
+
+static const struct v4l2_subdev_pad_ops vd55g_pad_ops = {
+	.enum_mbus_code = vd55g_enum_mbus_code,
+	.get_fmt = v4l2_subdev_get_fmt,
+	.set_fmt = vd55g_set_pad_fmt,
+	.get_selection = vd55g_get_selection,
+	.enum_frame_size = vd55g_enum_frame_size,
+	.enable_streams = vd55g_enable_streams,
+	.disable_streams = vd55g_disable_streams,
+};
+
+static const struct v4l2_subdev_video_ops vd55g_video_ops = {
+	.s_stream = v4l2_subdev_s_stream_helper,
+};
+
+static const struct v4l2_subdev_ops vd55g_subdev_ops = {
+	.video = &vd55g_video_ops,
+	.pad = &vd55g_pad_ops,
+};
+
+static int vd55g_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct vd55g *sensor = ctrl_to_vd55g(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 = vd55g_read_expo_cluster(sensor);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	pm_runtime_put_autosuspend(sensor->dev);
+
+	return ret;
+}
+
+static int vd55g_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct vd55g *sensor = ctrl_to_vd55g(ctrl);
+	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 = vd55g_get_hblank_min(sensor, format, crop);
+	struct vd55g_frame_timings timings;
+	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:
+	case V4L2_CID_FLASH_LED_MODE:
+		vd55g_get_frame_timings(sensor, crop, &timings);
+		ret = __v4l2_ctrl_modify_range(sensor->expo_ctrl, 0,
+					       timings.expo_max, 1,
+					       VD55G_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 = vd55g_write(sensor, VD55G_REG_ORIENTATION,
+				  sensor->hflip_ctrl->val |
+					  (sensor->vflip_ctrl->val << 1),
+				  NULL);
+		break;
+	case V4L2_CID_TEST_PATTERN:
+		ret = vd55g_update_patgen(sensor, ctrl->val);
+		break;
+	case V4L2_CID_EXPOSURE_AUTO:
+		ret = vd55g_update_expo_cluster(sensor, is_auto);
+		break;
+	case V4L2_CID_3A_LOCK:
+		ret = vd55g_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 = vd55g_update_exposure_target(sensor, ctrl->val);
+		break;
+	case V4L2_CID_VBLANK:
+		ret = vd55g_update_frame_length(sensor, timings.frame_length);
+		break;
+	case V4L2_CID_FLASH_LED_MODE:
+		ret = vd55g_update_gpios(sensor, sensor->ext_leds_mask);
+		break;
+	case V4L2_CID_HDR_SENSOR_MODE:
+		ret = vd55g_update_hdr_mode(sensor);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	pm_runtime_put_autosuspend(sensor->dev);
+
+	return ret;
+}
+
+static const struct v4l2_ctrl_ops vd55g_ctrl_ops = {
+	.g_volatile_ctrl = vd55g_g_volatile_ctrl,
+	.s_ctrl = vd55g_s_ctrl,
+};
+
+static int vd55g_init_ctrls(struct vd55g *sensor)
+{
+	const struct v4l2_ctrl_ops *ops = &vd55g_ctrl_ops;
+	struct v4l2_ctrl_handler *hdl = &sensor->ctrl_handler;
+	struct v4l2_ctrl *ctrl;
+	struct v4l2_fwnode_device_properties fwnode_props;
+	struct vd55g_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 = vd55g_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, VD55G_AGAIN_DEF);
+	sensor->dgain_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_DIGITAL_GAIN,
+					       256, 0xffff, 1, VD55G_DGAIN_DEF);
+	sensor->expo_ctrl =
+		v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE, 0,
+				  VD55G_FRAME_LENGTH_DEF - VD55G_EXPO_MAX_TERM,
+				  1, VD55G_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(vd55g_tp_menu) - 1, 0,
+					     0, vd55g_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(vd55g_ev_bias_menu) - 1,
+				       ARRAY_SIZE(vd55g_ev_bias_menu) / 2,
+				       vd55g_ev_bias_menu);
+	if (sensor->info->hdr) {
+		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 = vd55g_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;
+	vd55g_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 vd55g_detect(struct vd55g *sensor)
+{
+	const struct vd55g_chip_info *info;
+	u64 id;
+	int ret;
+
+	info = device_get_match_data(sensor->dev);
+
+	sensor->info = info;
+
+	ret = vd55g_wait_state(sensor, VD55G_SYSTEM_FSM_READY_TO_BOOT, NULL);
+	if (ret)
+		return ret;
+
+	ret = vd55g_read(sensor, VD55G_REG_MODEL_ID, &id, NULL);
+	if (ret)
+		return ret;
+
+	if (id != sensor->info->id) {
+		dev_err(sensor->dev,
+			"Expected %s (0x%x), but detected mismatched sensor id 0x%x\n",
+			sensor->info->name, (u32)sensor->info->id, (u32)id);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int vd55g_power_on(struct device *dev)
+{
+	struct v4l2_subdev *sd = dev_get_drvdata(dev);
+	struct vd55g *sensor = to_vd55g(sd);
+	int ret;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(vd55g_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 = vd55g_detect(sensor);
+	if (ret) {
+		dev_err(dev, "Sensor detect failed %d\n", ret);
+		goto disable_clock;
+	}
+
+	ret = vd55g_prepare_clock_tree(sensor);
+	if (ret)
+		goto disable_clock;
+
+	/* Setup clock now to advance through system FSM states */
+	vd55g_write(sensor, VD55G_REG_EXT_CLOCK, sensor->xclk_freq, &ret);
+
+	ret = vd55g_boot(sensor);
+	if (ret) {
+		dev_err(dev, "Sensor boot 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(vd55g_supply_name), sensor->supplies);
+
+	return ret;
+}
+
+static int vd55g_power_off(struct device *dev)
+{
+	struct v4l2_subdev *sd = dev_get_drvdata(dev);
+	struct vd55g *sensor = to_vd55g(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 vd55g_check_csi_conf(struct vd55g *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);
+	fwnode_handle_put(endpoint);
+	if (ret)
+		return ret;
+
+	/* 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 vd55g_parse_dt_gpios_array(struct vd55g *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] >= VD55G_NB_GPIOS) {
+			dev_err(sensor->dev, "Invalid GPIO number %d\n",
+				array[i]);
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static int vd55g_parse_dt_gpios(struct vd55g *sensor)
+{
+	u32 led_gpios[VD55G_NB_GPIOS];
+	int nb_gpios_leds;
+	unsigned int i;
+	int ret;
+
+	/* Initialize GPIOs to default */
+	for (i = 0; i < VD55G_NB_GPIOS; i++)
+		sensor->gpios[i] = VD55G_GPIO_MODE_IN;
+	sensor->ext_leds_mask = 0;
+
+	/* Take into account optional 'st,leds' output for GPIOs */
+	ret = vd55g_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]] = VD55G_GPIO_MODE_STROBE;
+		set_bit(led_gpios[i], &sensor->ext_leds_mask);
+	}
+
+	if (nb_gpios_leds == 0) {
+		sensor->gpios[1] = VD55G_GPIO_MODE_STROBE;
+		set_bit(1, &sensor->ext_leds_mask);
+	}
+
+	return 0;
+}
+
+static int vd55g_parse_dt(struct vd55g *sensor)
+{
+	struct fwnode_handle *endpoint;
+	int ret;
+
+	endpoint =
+		fwnode_graph_get_next_endpoint(dev_fwnode(sensor->dev), NULL);
+	if (!endpoint)
+		return dev_err_probe(sensor->dev, -EPROBE_DEFER,
+				     "waiting for fwnode graph endpoint\n");
+
+	ret = vd55g_check_csi_conf(sensor, endpoint);
+	if (ret)
+		return ret;
+
+	return vd55g_parse_dt_gpios(sensor);
+}
+
+static int vd55g_subdev_init(struct vd55g *sensor)
+{
+	int ret;
+
+	/* Init sub device */
+	sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+	sensor->sd.internal_ops = &vd55g_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 = vd55g_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 vd55g_subdev_cleanup(struct vd55g *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 vd55g_get_regulators(struct vd55g *sensor)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(vd55g_supply_name); i++)
+		sensor->supplies[i].supply = vd55g_supply_name[i];
+
+	return devm_regulator_bulk_get(sensor->dev,
+				       ARRAY_SIZE(vd55g_supply_name),
+				       sensor->supplies);
+}
+
+static int vd55g_probe(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	struct vd55g *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, &vd55g_subdev_ops);
+
+	ret = vd55g_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 = vd55g_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);
+
+	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 = vd55g_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 = vd55g_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:
+	vd55g_subdev_cleanup(sensor);
+err_power_off:
+	pm_runtime_disable(dev);
+	pm_runtime_put_noidle(dev);
+	pm_runtime_dont_use_autosuspend(dev);
+	vd55g_power_off(dev);
+
+	return ret;
+}
+
+static void vd55g_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct vd55g *sensor = to_vd55g(sd);
+
+	vd55g_subdev_cleanup(sensor);
+
+	pm_runtime_disable(&client->dev);
+	if (!pm_runtime_status_suspended(&client->dev))
+		vd55g_power_off(&client->dev);
+	pm_runtime_set_suspended(&client->dev);
+	pm_runtime_dont_use_autosuspend(&client->dev);
+}
+
+static const struct acpi_device_id vd55g_acpi_match[] = {
+	{ "SMO55F0", (kernel_ulong_t)&vd55g0_chip_info },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(acpi, vd55g_acpi_match);
+
+static const struct of_device_id vd55g_dt_ids[] = {
+	{ .compatible = "st,vd55g0", .data = &vd55g0_chip_info },
+	{ .compatible = "st,vd55g1", .data = &vd55g1_chip_info },
+	{ .compatible = "st,vd65g4", .data = &vd65g4_chip_info },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, vd55g_dt_ids);
+
+static const struct dev_pm_ops vd55g_pm_ops = {
+	SET_RUNTIME_PM_OPS(vd55g_power_off, vd55g_power_on, NULL)
+};
+
+static struct i2c_driver vd55g_i2c_driver = {
+	.driver = {
+		.name  = "vd55g",
+		.acpi_match_table = vd55g_acpi_match,
+		.of_match_table = vd55g_dt_ids,
+		.pm = &vd55g_pm_ops,
+		},
+	.probe = vd55g_probe,
+	.remove = vd55g_remove,
+};
+
+module_i2c_driver(vd55g_i2c_driver);
+
+MODULE_AUTHOR("Peter Marshall <pm@petermarshall.ca>");
+MODULE_AUTHOR("Benjamin Mugnier <benjamin.mugnier@foss.st.com>");
+MODULE_AUTHOR("Sylvain Petinot <sylvain.petinot@foss.st.com>");
+MODULE_DESCRIPTION("VD55G camera subdev driver");
+MODULE_FIRMWARE("vd55g0-cut1.bin");
+MODULE_FIRMWARE("vd55g0-cut2.bin");
+MODULE_FIRMWARE("vd55g1.bin");
+MODULE_LICENSE("GPL");
-- 
2.55.0