1 files changed, 1014 insertions, 0 deletions

diff --git a/drivers/media/i2c/ov01a10.c b/drivers/media/i2c/ov01a10.c
new file mode 100644
index 0000000000..9afe9bf503
--- /dev/null
+++ b/drivers/media/i2c/ov01a10.c
@@ -0,0 +1,1014 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2023 Intel Corporation.
+ */
+
+#include <asm/unaligned.h>
+
+#include <linux/acpi.h>
+#include <linux/bitfield.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-fwnode.h>
+
+#define OV01A10_LINK_FREQ_400MHZ	400000000ULL
+#define OV01A10_SCLK			40000000LL
+#define OV01A10_DATA_LANES		1
+
+#define OV01A10_REG_CHIP_ID		0x300a
+#define OV01A10_CHIP_ID			0x560141
+
+#define OV01A10_REG_MODE_SELECT		0x0100
+#define OV01A10_MODE_STANDBY		0x00
+#define OV01A10_MODE_STREAMING		0x01
+
+/* pixel array */
+#define OV01A10_PIXEL_ARRAY_WIDTH	1296
+#define OV01A10_PIXEL_ARRAY_HEIGHT	816
+#define OV01A10_ACITVE_WIDTH		1280
+#define OV01A10_ACITVE_HEIGHT		800
+
+/* vertical and horizontal timings */
+#define OV01A10_REG_VTS			0x380e
+#define OV01A10_VTS_DEF			0x0380
+#define OV01A10_VTS_MIN			0x0380
+#define OV01A10_VTS_MAX			0xffff
+#define OV01A10_HTS_DEF			1488
+
+/* exposure controls */
+#define OV01A10_REG_EXPOSURE		0x3501
+#define OV01A10_EXPOSURE_MIN		4
+#define OV01A10_EXPOSURE_MAX_MARGIN	8
+#define OV01A10_EXPOSURE_STEP		1
+
+/* analog gain controls */
+#define OV01A10_REG_ANALOG_GAIN		0x3508
+#define OV01A10_ANAL_GAIN_MIN		0x100
+#define OV01A10_ANAL_GAIN_MAX		0xffff
+#define OV01A10_ANAL_GAIN_STEP		1
+
+/* digital gain controls */
+#define OV01A10_REG_DIGITAL_GAIN_B	0x350a
+#define OV01A10_REG_DIGITAL_GAIN_GB	0x3510
+#define OV01A10_REG_DIGITAL_GAIN_GR	0x3513
+#define OV01A10_REG_DIGITAL_GAIN_R	0x3516
+#define OV01A10_DGTL_GAIN_MIN		0
+#define OV01A10_DGTL_GAIN_MAX		0x3ffff
+#define OV01A10_DGTL_GAIN_STEP		1
+#define OV01A10_DGTL_GAIN_DEFAULT	1024
+
+/* test pattern control */
+#define OV01A10_REG_TEST_PATTERN	0x4503
+#define OV01A10_TEST_PATTERN_ENABLE	BIT(7)
+#define OV01A10_LINK_FREQ_400MHZ_INDEX	0
+
+/* flip and mirror control */
+#define OV01A10_REG_FORMAT1		0x3820
+#define OV01A10_VFLIP_MASK		BIT(4)
+#define OV01A10_HFLIP_MASK		BIT(3)
+
+/* window offset */
+#define OV01A10_REG_X_WIN		0x3811
+#define OV01A10_REG_Y_WIN		0x3813
+
+struct ov01a10_reg {
+	u16 address;
+	u8 val;
+};
+
+struct ov01a10_reg_list {
+	u32 num_of_regs;
+	const struct ov01a10_reg *regs;
+};
+
+struct ov01a10_link_freq_config {
+	const struct ov01a10_reg_list reg_list;
+};
+
+struct ov01a10_mode {
+	u32 width;
+	u32 height;
+	u32 hts;
+	u32 vts_def;
+	u32 vts_min;
+	u32 link_freq_index;
+
+	const struct ov01a10_reg_list reg_list;
+};
+
+static const struct ov01a10_reg mipi_data_rate_720mbps[] = {
+	{0x0103, 0x01},
+	{0x0302, 0x00},
+	{0x0303, 0x06},
+	{0x0304, 0x01},
+	{0x0305, 0xe0},
+	{0x0306, 0x00},
+	{0x0308, 0x01},
+	{0x0309, 0x00},
+	{0x030c, 0x01},
+	{0x0322, 0x01},
+	{0x0323, 0x06},
+	{0x0324, 0x01},
+	{0x0325, 0x68},
+};
+
+static const struct ov01a10_reg sensor_1280x800_setting[] = {
+	{0x3002, 0xa1},
+	{0x301e, 0xf0},
+	{0x3022, 0x01},
+	{0x3501, 0x03},
+	{0x3502, 0x78},
+	{0x3504, 0x0c},
+	{0x3508, 0x01},
+	{0x3509, 0x00},
+	{0x3601, 0xc0},
+	{0x3603, 0x71},
+	{0x3610, 0x68},
+	{0x3611, 0x86},
+	{0x3640, 0x10},
+	{0x3641, 0x80},
+	{0x3642, 0xdc},
+	{0x3646, 0x55},
+	{0x3647, 0x57},
+	{0x364b, 0x00},
+	{0x3653, 0x10},
+	{0x3655, 0x00},
+	{0x3656, 0x00},
+	{0x365f, 0x0f},
+	{0x3661, 0x45},
+	{0x3662, 0x24},
+	{0x3663, 0x11},
+	{0x3664, 0x07},
+	{0x3709, 0x34},
+	{0x370b, 0x6f},
+	{0x3714, 0x22},
+	{0x371b, 0x27},
+	{0x371c, 0x67},
+	{0x371d, 0xa7},
+	{0x371e, 0xe7},
+	{0x3730, 0x81},
+	{0x3733, 0x10},
+	{0x3734, 0x40},
+	{0x3737, 0x04},
+	{0x3739, 0x1c},
+	{0x3767, 0x00},
+	{0x376c, 0x81},
+	{0x3772, 0x14},
+	{0x37c2, 0x04},
+	{0x37d8, 0x03},
+	{0x37d9, 0x0c},
+	{0x37e0, 0x00},
+	{0x37e1, 0x08},
+	{0x37e2, 0x10},
+	{0x37e3, 0x04},
+	{0x37e4, 0x04},
+	{0x37e5, 0x03},
+	{0x37e6, 0x04},
+	{0x3800, 0x00},
+	{0x3801, 0x00},
+	{0x3802, 0x00},
+	{0x3803, 0x00},
+	{0x3804, 0x05},
+	{0x3805, 0x0f},
+	{0x3806, 0x03},
+	{0x3807, 0x2f},
+	{0x3808, 0x05},
+	{0x3809, 0x00},
+	{0x380a, 0x03},
+	{0x380b, 0x20},
+	{0x380c, 0x02},
+	{0x380d, 0xe8},
+	{0x380e, 0x03},
+	{0x380f, 0x80},
+	{0x3810, 0x00},
+	{0x3811, 0x08},
+	{0x3812, 0x00},
+	{0x3813, 0x08},
+	{0x3814, 0x01},
+	{0x3815, 0x01},
+	{0x3816, 0x01},
+	{0x3817, 0x01},
+	{0x3820, 0xa0},
+	{0x3822, 0x13},
+	{0x3832, 0x28},
+	{0x3833, 0x10},
+	{0x3b00, 0x00},
+	{0x3c80, 0x00},
+	{0x3c88, 0x02},
+	{0x3c8c, 0x07},
+	{0x3c8d, 0x40},
+	{0x3cc7, 0x80},
+	{0x4000, 0xc3},
+	{0x4001, 0xe0},
+	{0x4003, 0x40},
+	{0x4008, 0x02},
+	{0x4009, 0x19},
+	{0x400a, 0x01},
+	{0x400b, 0x6c},
+	{0x4011, 0x00},
+	{0x4041, 0x00},
+	{0x4300, 0xff},
+	{0x4301, 0x00},
+	{0x4302, 0x0f},
+	{0x4503, 0x00},
+	{0x4601, 0x50},
+	{0x4800, 0x64},
+	{0x481f, 0x34},
+	{0x4825, 0x33},
+	{0x4837, 0x11},
+	{0x4881, 0x40},
+	{0x4883, 0x01},
+	{0x4890, 0x00},
+	{0x4901, 0x00},
+	{0x4902, 0x00},
+	{0x4b00, 0x2a},
+	{0x4b0d, 0x00},
+	{0x450a, 0x04},
+	{0x450b, 0x00},
+	{0x5000, 0x65},
+	{0x5200, 0x18},
+	{0x5004, 0x00},
+	{0x5080, 0x40},
+	{0x0305, 0xf4},
+	{0x0325, 0xc2},
+};
+
+static const char * const ov01a10_test_pattern_menu[] = {
+	"Disabled",
+	"Color Bar",
+	"Top-Bottom Darker Color Bar",
+	"Right-Left Darker Color Bar",
+	"Color Bar type 4",
+};
+
+static const s64 link_freq_menu_items[] = {
+	OV01A10_LINK_FREQ_400MHZ,
+};
+
+static const struct ov01a10_link_freq_config link_freq_configs[] = {
+	[OV01A10_LINK_FREQ_400MHZ_INDEX] = {
+		.reg_list = {
+			.num_of_regs = ARRAY_SIZE(mipi_data_rate_720mbps),
+			.regs = mipi_data_rate_720mbps,
+		}
+	},
+};
+
+static const struct ov01a10_mode supported_modes[] = {
+	{
+		.width = OV01A10_ACITVE_WIDTH,
+		.height = OV01A10_ACITVE_HEIGHT,
+		.hts = OV01A10_HTS_DEF,
+		.vts_def = OV01A10_VTS_DEF,
+		.vts_min = OV01A10_VTS_MIN,
+		.reg_list = {
+			.num_of_regs = ARRAY_SIZE(sensor_1280x800_setting),
+			.regs = sensor_1280x800_setting,
+		},
+		.link_freq_index = OV01A10_LINK_FREQ_400MHZ_INDEX,
+	},
+};
+
+struct ov01a10 {
+	struct v4l2_subdev sd;
+	struct media_pad pad;
+	struct v4l2_ctrl_handler ctrl_handler;
+
+	/* v4l2 controls */
+	struct v4l2_ctrl *link_freq;
+	struct v4l2_ctrl *pixel_rate;
+	struct v4l2_ctrl *vblank;
+	struct v4l2_ctrl *hblank;
+	struct v4l2_ctrl *exposure;
+
+	const struct ov01a10_mode *cur_mode;
+
+	/* streaming state */
+	bool streaming;
+};
+
+static inline struct ov01a10 *to_ov01a10(struct v4l2_subdev *subdev)
+{
+	return container_of(subdev, struct ov01a10, sd);
+}
+
+static int ov01a10_read_reg(struct ov01a10 *ov01a10, u16 reg, u16 len, u32 *val)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&ov01a10->sd);
+	struct i2c_msg msgs[2];
+	u8 addr_buf[2];
+	u8 data_buf[4] = {0};
+	int ret = 0;
+
+	if (len > sizeof(data_buf))
+		return -EINVAL;
+
+	put_unaligned_be16(reg, addr_buf);
+	msgs[0].addr = client->addr;
+	msgs[0].flags = 0;
+	msgs[0].len = sizeof(addr_buf);
+	msgs[0].buf = addr_buf;
+	msgs[1].addr = client->addr;
+	msgs[1].flags = I2C_M_RD;
+	msgs[1].len = len;
+	msgs[1].buf = &data_buf[sizeof(data_buf) - len];
+
+	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+
+	if (ret != ARRAY_SIZE(msgs))
+		return ret < 0 ? ret : -EIO;
+
+	*val = get_unaligned_be32(data_buf);
+
+	return 0;
+}
+
+static int ov01a10_write_reg(struct ov01a10 *ov01a10, u16 reg, u16 len, u32 val)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&ov01a10->sd);
+	u8 buf[6];
+	int ret = 0;
+
+	if (len > 4)
+		return -EINVAL;
+
+	put_unaligned_be16(reg, buf);
+	put_unaligned_be32(val << 8 * (4 - len), buf + 2);
+
+	ret = i2c_master_send(client, buf, len + 2);
+	if (ret != len + 2)
+		return ret < 0 ? ret : -EIO;
+
+	return 0;
+}
+
+static int ov01a10_write_reg_list(struct ov01a10 *ov01a10,
+				  const struct ov01a10_reg_list *r_list)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&ov01a10->sd);
+	unsigned int i;
+	int ret = 0;
+
+	for (i = 0; i < r_list->num_of_regs; i++) {
+		ret = ov01a10_write_reg(ov01a10, r_list->regs[i].address, 1,
+					r_list->regs[i].val);
+		if (ret) {
+			dev_err_ratelimited(&client->dev,
+					    "write reg 0x%4.4x err = %d\n",
+					    r_list->regs[i].address, ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int ov01a10_update_digital_gain(struct ov01a10 *ov01a10, u32 d_gain)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&ov01a10->sd);
+	u32 real = d_gain << 6;
+	int ret = 0;
+
+	ret = ov01a10_write_reg(ov01a10, OV01A10_REG_DIGITAL_GAIN_B, 3, real);
+	if (ret) {
+		dev_err(&client->dev, "failed to set DIGITAL_GAIN_B\n");
+		return ret;
+	}
+
+	ret = ov01a10_write_reg(ov01a10, OV01A10_REG_DIGITAL_GAIN_GB, 3, real);
+	if (ret) {
+		dev_err(&client->dev, "failed to set DIGITAL_GAIN_GB\n");
+		return ret;
+	}
+
+	ret = ov01a10_write_reg(ov01a10, OV01A10_REG_DIGITAL_GAIN_GR, 3, real);
+	if (ret) {
+		dev_err(&client->dev, "failed to set DIGITAL_GAIN_GR\n");
+		return ret;
+	}
+
+	ret = ov01a10_write_reg(ov01a10, OV01A10_REG_DIGITAL_GAIN_R, 3, real);
+	if (ret)
+		dev_err(&client->dev, "failed to set DIGITAL_GAIN_R\n");
+
+	return ret;
+}
+
+static int ov01a10_test_pattern(struct ov01a10 *ov01a10, u32 pattern)
+{
+	if (!pattern)
+		return 0;
+
+	pattern = (pattern - 1) | OV01A10_TEST_PATTERN_ENABLE;
+
+	return ov01a10_write_reg(ov01a10, OV01A10_REG_TEST_PATTERN, 1, pattern);
+}
+
+/* for vflip and hflip, use 0x9 as window offset to keep the bayer */
+static int ov01a10_set_hflip(struct ov01a10 *ov01a10, u32 hflip)
+{
+	int ret;
+	u32 val, offset;
+
+	offset = hflip ? 0x9 : 0x8;
+	ret = ov01a10_write_reg(ov01a10, OV01A10_REG_X_WIN, 1, offset);
+	if (ret)
+		return ret;
+
+	ret = ov01a10_read_reg(ov01a10, OV01A10_REG_FORMAT1, 1, &val);
+	if (ret)
+		return ret;
+
+	val = hflip ? val | FIELD_PREP(OV01A10_HFLIP_MASK, 0x1) :
+		val & ~OV01A10_HFLIP_MASK;
+
+	return ov01a10_write_reg(ov01a10, OV01A10_REG_FORMAT1, 1, val);
+}
+
+static int ov01a10_set_vflip(struct ov01a10 *ov01a10, u32 vflip)
+{
+	int ret;
+	u32 val, offset;
+
+	offset = vflip ? 0x9 : 0x8;
+	ret = ov01a10_write_reg(ov01a10, OV01A10_REG_Y_WIN, 1, offset);
+	if (ret)
+		return ret;
+
+	ret = ov01a10_read_reg(ov01a10, OV01A10_REG_FORMAT1, 1, &val);
+	if (ret)
+		return ret;
+
+	val = vflip ? val | FIELD_PREP(OV01A10_VFLIP_MASK, 0x1) :
+		val & ~OV01A10_VFLIP_MASK;
+
+	return ov01a10_write_reg(ov01a10, OV01A10_REG_FORMAT1, 1, val);
+}
+
+static int ov01a10_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct ov01a10 *ov01a10 = container_of(ctrl->handler,
+					       struct ov01a10, ctrl_handler);
+	struct i2c_client *client = v4l2_get_subdevdata(&ov01a10->sd);
+	s64 exposure_max;
+	int ret = 0;
+
+	if (ctrl->id == V4L2_CID_VBLANK) {
+		exposure_max = ov01a10->cur_mode->height + ctrl->val -
+			OV01A10_EXPOSURE_MAX_MARGIN;
+		__v4l2_ctrl_modify_range(ov01a10->exposure,
+					 ov01a10->exposure->minimum,
+					 exposure_max, ov01a10->exposure->step,
+					 exposure_max);
+	}
+
+	if (!pm_runtime_get_if_in_use(&client->dev))
+		return 0;
+
+	switch (ctrl->id) {
+	case V4L2_CID_ANALOGUE_GAIN:
+		ret = ov01a10_write_reg(ov01a10, OV01A10_REG_ANALOG_GAIN, 2,
+					ctrl->val);
+		break;
+
+	case V4L2_CID_DIGITAL_GAIN:
+		ret = ov01a10_update_digital_gain(ov01a10, ctrl->val);
+		break;
+
+	case V4L2_CID_EXPOSURE:
+		ret = ov01a10_write_reg(ov01a10, OV01A10_REG_EXPOSURE, 2,
+					ctrl->val);
+		break;
+
+	case V4L2_CID_VBLANK:
+		ret = ov01a10_write_reg(ov01a10, OV01A10_REG_VTS, 2,
+					ov01a10->cur_mode->height + ctrl->val);
+		break;
+
+	case V4L2_CID_TEST_PATTERN:
+		ret = ov01a10_test_pattern(ov01a10, ctrl->val);
+		break;
+
+	case V4L2_CID_HFLIP:
+		ov01a10_set_hflip(ov01a10, ctrl->val);
+		break;
+
+	case V4L2_CID_VFLIP:
+		ov01a10_set_vflip(ov01a10, ctrl->val);
+		break;
+
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	pm_runtime_put(&client->dev);
+
+	return ret;
+}
+
+static const struct v4l2_ctrl_ops ov01a10_ctrl_ops = {
+	.s_ctrl = ov01a10_set_ctrl,
+};
+
+static int ov01a10_init_controls(struct ov01a10 *ov01a10)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&ov01a10->sd);
+	struct v4l2_fwnode_device_properties props;
+	u32 vblank_min, vblank_max, vblank_default;
+	struct v4l2_ctrl_handler *ctrl_hdlr;
+	const struct ov01a10_mode *cur_mode;
+	s64 exposure_max, h_blank;
+	int ret = 0;
+	int size;
+
+	ret = v4l2_fwnode_device_parse(&client->dev, &props);
+	if (ret)
+		return ret;
+
+	ctrl_hdlr = &ov01a10->ctrl_handler;
+	ret = v4l2_ctrl_handler_init(ctrl_hdlr, 12);
+	if (ret)
+		return ret;
+
+	cur_mode = ov01a10->cur_mode;
+	size = ARRAY_SIZE(link_freq_menu_items);
+
+	ov01a10->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr,
+						    &ov01a10_ctrl_ops,
+						    V4L2_CID_LINK_FREQ,
+						    size - 1, 0,
+						    link_freq_menu_items);
+	if (ov01a10->link_freq)
+		ov01a10->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	ov01a10->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov01a10_ctrl_ops,
+						V4L2_CID_PIXEL_RATE, 0,
+						OV01A10_SCLK, 1, OV01A10_SCLK);
+
+	vblank_min = cur_mode->vts_min - cur_mode->height;
+	vblank_max = OV01A10_VTS_MAX - cur_mode->height;
+	vblank_default = cur_mode->vts_def - cur_mode->height;
+	ov01a10->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov01a10_ctrl_ops,
+					    V4L2_CID_VBLANK, vblank_min,
+					    vblank_max, 1, vblank_default);
+
+	h_blank = cur_mode->hts - cur_mode->width;
+	ov01a10->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov01a10_ctrl_ops,
+					    V4L2_CID_HBLANK, h_blank, h_blank,
+					    1, h_blank);
+	if (ov01a10->hblank)
+		ov01a10->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	v4l2_ctrl_new_std(ctrl_hdlr, &ov01a10_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
+			  OV01A10_ANAL_GAIN_MIN, OV01A10_ANAL_GAIN_MAX,
+			  OV01A10_ANAL_GAIN_STEP, OV01A10_ANAL_GAIN_MIN);
+	v4l2_ctrl_new_std(ctrl_hdlr, &ov01a10_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
+			  OV01A10_DGTL_GAIN_MIN, OV01A10_DGTL_GAIN_MAX,
+			  OV01A10_DGTL_GAIN_STEP, OV01A10_DGTL_GAIN_DEFAULT);
+
+	exposure_max = cur_mode->vts_def - OV01A10_EXPOSURE_MAX_MARGIN;
+	ov01a10->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov01a10_ctrl_ops,
+					      V4L2_CID_EXPOSURE,
+					      OV01A10_EXPOSURE_MIN,
+					      exposure_max,
+					      OV01A10_EXPOSURE_STEP,
+					      exposure_max);
+
+	v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov01a10_ctrl_ops,
+				     V4L2_CID_TEST_PATTERN,
+				     ARRAY_SIZE(ov01a10_test_pattern_menu) - 1,
+				     0, 0, ov01a10_test_pattern_menu);
+
+	v4l2_ctrl_new_std(ctrl_hdlr, &ov01a10_ctrl_ops, V4L2_CID_HFLIP,
+			  0, 1, 1, 0);
+	v4l2_ctrl_new_std(ctrl_hdlr, &ov01a10_ctrl_ops, V4L2_CID_VFLIP,
+			  0, 1, 1, 0);
+
+	ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &ov01a10_ctrl_ops,
+					      &props);
+	if (ret)
+		goto fail;
+
+	if (ctrl_hdlr->error) {
+		ret = ctrl_hdlr->error;
+		goto fail;
+	}
+
+	ov01a10->sd.ctrl_handler = ctrl_hdlr;
+
+	return 0;
+fail:
+	v4l2_ctrl_handler_free(ctrl_hdlr);
+
+	return ret;
+}
+
+static void ov01a10_update_pad_format(const struct ov01a10_mode *mode,
+				      struct v4l2_mbus_framefmt *fmt)
+{
+	fmt->width = mode->width;
+	fmt->height = mode->height;
+	fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10;
+	fmt->field = V4L2_FIELD_NONE;
+	fmt->colorspace = V4L2_COLORSPACE_RAW;
+}
+
+static int ov01a10_start_streaming(struct ov01a10 *ov01a10)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&ov01a10->sd);
+	const struct ov01a10_reg_list *reg_list;
+	int link_freq_index;
+	int ret = 0;
+
+	link_freq_index = ov01a10->cur_mode->link_freq_index;
+	reg_list = &link_freq_configs[link_freq_index].reg_list;
+	ret = ov01a10_write_reg_list(ov01a10, reg_list);
+	if (ret) {
+		dev_err(&client->dev, "failed to set plls\n");
+		return ret;
+	}
+
+	reg_list = &ov01a10->cur_mode->reg_list;
+	ret = ov01a10_write_reg_list(ov01a10, reg_list);
+	if (ret) {
+		dev_err(&client->dev, "failed to set mode\n");
+		return ret;
+	}
+
+	ret = __v4l2_ctrl_handler_setup(ov01a10->sd.ctrl_handler);
+	if (ret)
+		return ret;
+
+	ret = ov01a10_write_reg(ov01a10, OV01A10_REG_MODE_SELECT, 1,
+				OV01A10_MODE_STREAMING);
+	if (ret)
+		dev_err(&client->dev, "failed to start streaming\n");
+
+	return ret;
+}
+
+static void ov01a10_stop_streaming(struct ov01a10 *ov01a10)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&ov01a10->sd);
+	int ret = 0;
+
+	ret = ov01a10_write_reg(ov01a10, OV01A10_REG_MODE_SELECT, 1,
+				OV01A10_MODE_STANDBY);
+	if (ret)
+		dev_err(&client->dev, "failed to stop streaming\n");
+}
+
+static int ov01a10_set_stream(struct v4l2_subdev *sd, int enable)
+{
+	struct ov01a10 *ov01a10 = to_ov01a10(sd);
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+	struct v4l2_subdev_state *state;
+	int ret = 0;
+
+	state = v4l2_subdev_lock_and_get_active_state(sd);
+	if (ov01a10->streaming == enable)
+		goto unlock;
+
+	if (enable) {
+		ret = pm_runtime_resume_and_get(&client->dev);
+		if (ret < 0)
+			goto unlock;
+
+		ret = ov01a10_start_streaming(ov01a10);
+		if (ret) {
+			pm_runtime_put(&client->dev);
+			goto unlock;
+		}
+
+		goto done;
+	}
+
+	ov01a10_stop_streaming(ov01a10);
+	pm_runtime_put(&client->dev);
+done:
+	ov01a10->streaming = enable;
+unlock:
+	v4l2_subdev_unlock_state(state);
+
+	return ret;
+}
+
+static int __maybe_unused ov01a10_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct ov01a10 *ov01a10 = to_ov01a10(sd);
+	struct v4l2_subdev_state *state;
+
+	state = v4l2_subdev_lock_and_get_active_state(sd);
+	if (ov01a10->streaming)
+		ov01a10_stop_streaming(ov01a10);
+
+	v4l2_subdev_unlock_state(state);
+
+	return 0;
+}
+
+static int __maybe_unused ov01a10_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct ov01a10 *ov01a10 = to_ov01a10(sd);
+	struct v4l2_subdev_state *state;
+	int ret = 0;
+
+	state = v4l2_subdev_lock_and_get_active_state(sd);
+	if (!ov01a10->streaming)
+		goto exit;
+
+	ret = ov01a10_start_streaming(ov01a10);
+	if (ret) {
+		ov01a10->streaming = false;
+		ov01a10_stop_streaming(ov01a10);
+	}
+
+exit:
+	v4l2_subdev_unlock_state(state);
+
+	return ret;
+}
+
+static int ov01a10_set_format(struct v4l2_subdev *sd,
+			      struct v4l2_subdev_state *sd_state,
+			      struct v4l2_subdev_format *fmt)
+{
+	struct ov01a10 *ov01a10 = to_ov01a10(sd);
+	const struct ov01a10_mode *mode;
+	struct v4l2_mbus_framefmt *format;
+	s32 vblank_def, h_blank;
+
+	mode = v4l2_find_nearest_size(supported_modes,
+				      ARRAY_SIZE(supported_modes), width,
+				      height, fmt->format.width,
+				      fmt->format.height);
+
+	ov01a10_update_pad_format(mode, &fmt->format);
+
+	if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
+		ov01a10->cur_mode = mode;
+		__v4l2_ctrl_s_ctrl(ov01a10->link_freq, mode->link_freq_index);
+		__v4l2_ctrl_s_ctrl_int64(ov01a10->pixel_rate, OV01A10_SCLK);
+
+		vblank_def = mode->vts_def - mode->height;
+		__v4l2_ctrl_modify_range(ov01a10->vblank,
+					 mode->vts_min - mode->height,
+					 OV01A10_VTS_MAX - mode->height, 1,
+					 vblank_def);
+		__v4l2_ctrl_s_ctrl(ov01a10->vblank, vblank_def);
+		h_blank = mode->hts - mode->width;
+		__v4l2_ctrl_modify_range(ov01a10->hblank, h_blank, h_blank, 1,
+					 h_blank);
+	}
+
+	format = v4l2_subdev_get_pad_format(sd, sd_state, fmt->stream);
+	*format = fmt->format;
+
+	return 0;
+}
+
+static int ov01a10_init_cfg(struct v4l2_subdev *sd,
+			    struct v4l2_subdev_state *state)
+{
+	struct v4l2_subdev_format fmt = {
+		.which = V4L2_SUBDEV_FORMAT_TRY,
+		.format = {
+			.width = OV01A10_ACITVE_WIDTH,
+			.height = OV01A10_ACITVE_HEIGHT,
+		},
+	};
+
+	ov01a10_set_format(sd, state, &fmt);
+
+	return 0;
+}
+
+static int ov01a10_enum_mbus_code(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_state *sd_state,
+				  struct v4l2_subdev_mbus_code_enum *code)
+{
+	if (code->index > 0)
+		return -EINVAL;
+
+	code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
+
+	return 0;
+}
+
+static int ov01a10_enum_frame_size(struct v4l2_subdev *sd,
+				   struct v4l2_subdev_state *sd_state,
+				   struct v4l2_subdev_frame_size_enum *fse)
+{
+	if (fse->index >= ARRAY_SIZE(supported_modes) ||
+	    fse->code != MEDIA_BUS_FMT_SBGGR10_1X10)
+		return -EINVAL;
+
+	fse->min_width = supported_modes[fse->index].width;
+	fse->max_width = fse->min_width;
+	fse->min_height = supported_modes[fse->index].height;
+	fse->max_height = fse->min_height;
+
+	return 0;
+}
+
+static int ov01a10_get_selection(struct v4l2_subdev *sd,
+				 struct v4l2_subdev_state *state,
+				 struct v4l2_subdev_selection *sel)
+{
+	if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
+		return -EINVAL;
+
+	switch (sel->target) {
+	case V4L2_SEL_TGT_NATIVE_SIZE:
+	case V4L2_SEL_TGT_CROP_BOUNDS:
+		sel->r.top = 0;
+		sel->r.left = 0;
+		sel->r.width = OV01A10_PIXEL_ARRAY_WIDTH;
+		sel->r.height = OV01A10_PIXEL_ARRAY_HEIGHT;
+		return 0;
+	case V4L2_SEL_TGT_CROP:
+	case V4L2_SEL_TGT_CROP_DEFAULT:
+		sel->r.top = (OV01A10_PIXEL_ARRAY_HEIGHT -
+			      OV01A10_ACITVE_HEIGHT) / 2;
+		sel->r.left = (OV01A10_PIXEL_ARRAY_WIDTH -
+			       OV01A10_ACITVE_WIDTH) / 2;
+		sel->r.width = OV01A10_ACITVE_WIDTH;
+		sel->r.height = OV01A10_ACITVE_HEIGHT;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+static const struct v4l2_subdev_core_ops ov01a10_core_ops = {
+	.log_status = v4l2_ctrl_subdev_log_status,
+	.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+	.unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
+static const struct v4l2_subdev_video_ops ov01a10_video_ops = {
+	.s_stream = ov01a10_set_stream,
+};
+
+static const struct v4l2_subdev_pad_ops ov01a10_pad_ops = {
+	.init_cfg = ov01a10_init_cfg,
+	.set_fmt = ov01a10_set_format,
+	.get_fmt = v4l2_subdev_get_fmt,
+	.get_selection = ov01a10_get_selection,
+	.enum_mbus_code = ov01a10_enum_mbus_code,
+	.enum_frame_size = ov01a10_enum_frame_size,
+};
+
+static const struct v4l2_subdev_ops ov01a10_subdev_ops = {
+	.core = &ov01a10_core_ops,
+	.video = &ov01a10_video_ops,
+	.pad = &ov01a10_pad_ops,
+};
+
+static const struct media_entity_operations ov01a10_subdev_entity_ops = {
+	.link_validate = v4l2_subdev_link_validate,
+};
+
+static int ov01a10_identify_module(struct ov01a10 *ov01a10)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&ov01a10->sd);
+	int ret;
+	u32 val;
+
+	ret = ov01a10_read_reg(ov01a10, OV01A10_REG_CHIP_ID, 3, &val);
+	if (ret)
+		return ret;
+
+	if (val != OV01A10_CHIP_ID) {
+		dev_err(&client->dev, "chip id mismatch: %x!=%x\n",
+			OV01A10_CHIP_ID, val);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static void ov01a10_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+	v4l2_async_unregister_subdev(sd);
+	media_entity_cleanup(&sd->entity);
+	v4l2_ctrl_handler_free(sd->ctrl_handler);
+
+	pm_runtime_disable(&client->dev);
+	pm_runtime_set_suspended(&client->dev);
+}
+
+static int ov01a10_probe(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	struct ov01a10 *ov01a10;
+	int ret = 0;
+
+	ov01a10 = devm_kzalloc(dev, sizeof(*ov01a10), GFP_KERNEL);
+	if (!ov01a10)
+		return -ENOMEM;
+
+	v4l2_i2c_subdev_init(&ov01a10->sd, client, &ov01a10_subdev_ops);
+
+	ret = ov01a10_identify_module(ov01a10);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "failed to find sensor\n");
+
+	ov01a10->cur_mode = &supported_modes[0];
+
+	ret = ov01a10_init_controls(ov01a10);
+	if (ret) {
+		dev_err(dev, "failed to init controls: %d\n", ret);
+		return ret;
+	}
+
+	ov01a10->sd.state_lock = ov01a10->ctrl_handler.lock;
+	ov01a10->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
+		V4L2_SUBDEV_FL_HAS_EVENTS;
+	ov01a10->sd.entity.ops = &ov01a10_subdev_entity_ops;
+	ov01a10->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+	ov01a10->pad.flags = MEDIA_PAD_FL_SOURCE;
+
+	ret = media_entity_pads_init(&ov01a10->sd.entity, 1, &ov01a10->pad);
+	if (ret) {
+		dev_err(dev, "Failed to init entity pads: %d\n", ret);
+		goto err_handler_free;
+	}
+
+	ret = v4l2_subdev_init_finalize(&ov01a10->sd);
+	if (ret) {
+		dev_err(dev, "Failed to allocate subdev state: %d\n", ret);
+		goto err_media_entity_cleanup;
+	}
+
+	/*
+	 * Device is already turned on by i2c-core with ACPI domain PM.
+	 * Enable runtime PM and turn off the device.
+	 */
+	pm_runtime_set_active(&client->dev);
+	pm_runtime_enable(dev);
+	pm_runtime_idle(dev);
+
+	ret = v4l2_async_register_subdev_sensor(&ov01a10->sd);
+	if (ret < 0) {
+		dev_err(dev, "Failed to register subdev: %d\n", ret);
+		goto err_pm_disable;
+	}
+
+	return 0;
+
+err_pm_disable:
+	pm_runtime_disable(dev);
+	pm_runtime_set_suspended(&client->dev);
+
+err_media_entity_cleanup:
+	media_entity_cleanup(&ov01a10->sd.entity);
+
+err_handler_free:
+	v4l2_ctrl_handler_free(ov01a10->sd.ctrl_handler);
+
+	return ret;
+}
+
+static const struct dev_pm_ops ov01a10_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(ov01a10_suspend, ov01a10_resume)
+};
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id ov01a10_acpi_ids[] = {
+	{ "OVTI01A0" },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(acpi, ov01a10_acpi_ids);
+#endif
+
+static struct i2c_driver ov01a10_i2c_driver = {
+	.driver = {
+		.name = "ov01a10",
+		.pm = &ov01a10_pm_ops,
+		.acpi_match_table = ACPI_PTR(ov01a10_acpi_ids),
+	},
+	.probe = ov01a10_probe,
+	.remove = ov01a10_remove,
+};
+
+module_i2c_driver(ov01a10_i2c_driver);
+
+MODULE_AUTHOR("Bingbu Cao <bingbu.cao@intel.com>");
+MODULE_AUTHOR("Wang Yating <yating.wang@intel.com>");
+MODULE_DESCRIPTION("OmniVision OV01A10 sensor driver");
+MODULE_LICENSE("GPL");