[PATCH 2/2] media: i2c: imx471: Add Sony IMX471 image sensor driver

From: Kate Hsuan

Date: Fri Apr 17 2026 - 04:38:26 EST

Add a new driver for Sony imx471 camera sensor. It is based on
Jimmy Su <jimmy.su@xxxxxxxxx> implementation and the driver can be found
in the following URL.
https://github.com/intel/ipu6-drivers/commits/master/drivers/media/i2c/imx471.c

This sensor can be found on Lenovo X9-14 and X9-15 laptop and it is a part
of IPU7 solution. The driver was tested on Lenovo X9-14 and X9-15 laptops.

Link: https://github.com/intel/ipu6-drivers/blob/master/drivers/media/i2c/imx471.c
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2454119
Signed-off-by: Kate Hsuan <hpa@xxxxxxxxxx>
---
MAINTAINERS | 7 +
drivers/media/i2c/Kconfig | 10 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/imx471.c | 1047 ++++++++++++++++++++++++++++++++++++
4 files changed, 1065 insertions(+)
create mode 100644 drivers/media/i2c/imx471.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 1126fdd639ad..9a2b3cc799e1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -24735,6 +24735,13 @@ T: git git://linuxtv.org/media.git
F: Documentation/devicetree/bindings/media/i2c/sony,imx415.yaml
F: drivers/media/i2c/imx415.c

+SONY IMX471 SENSOR DRIVER
+M: Kate Hsuan <hpa@xxxxxxxxxx>
+L: linux-media@xxxxxxxxxxxxxxx
+S: Maintained
+T: git git://linuxtv.org/media.git
+F: drivers/media/i2c/imx471.c
+
SONY MEMORYSTICK SUBSYSTEM
M: Maxim Levitsky <maximlevitsky@xxxxxxxxx>
M: Alex Dubov <oakad@xxxxxxxxx>
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 5eb1e0e0a87a..1c28c498a9f1 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -287,6 +287,16 @@ config VIDEO_IMX415
To compile this driver as a module, choose M here: the
module will be called imx415.

+config VIDEO_IMX471
+ tristate "Sony IMX471 sensor support"
+ select V4L2_CCI_I2C
+ help
+ This is a Video4Linux2 sensor driver for the Sony
+ IMX471 camera.
+
+ To compile this driver as a module, choose M here: the
+ module will be called imx471.
+
config VIDEO_MAX9271_LIB
tristate

diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index a3a6396df3c4..0539e9171030 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -61,6 +61,7 @@ obj-$(CONFIG_VIDEO_IMX335) += imx335.o
obj-$(CONFIG_VIDEO_IMX355) += imx355.o
obj-$(CONFIG_VIDEO_IMX412) += imx412.o
obj-$(CONFIG_VIDEO_IMX415) += imx415.o
+obj-$(CONFIG_VIDEO_IMX471) += imx471.o
obj-$(CONFIG_VIDEO_IR_I2C) += ir-kbd-i2c.o
obj-$(CONFIG_VIDEO_ISL7998X) += isl7998x.o
obj-$(CONFIG_VIDEO_KS0127) += ks0127.o
diff --git a/drivers/media/i2c/imx471.c b/drivers/media/i2c/imx471.c
new file mode 100644
index 000000000000..32a105a60731
--- /dev/null
+++ b/drivers/media/i2c/imx471.c
@@ -0,0 +1,1047 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2025 Intel Corporation
+
+#include <linux/version.h>
+#include <linux/unaligned.h>
+#include <linux/acpi.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.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 <linux/clk.h>
+#include <linux/delay.h>
+
+#define IMX471_REG_MODE_SELECT CCI_REG8(0x0100)
+#define IMX471_MODE_STANDBY 0x00
+#define IMX471_MODE_STREAMING 0x01
+
+/* Chip ID */
+#define IMX471_REG_CHIP_ID CCI_REG16(0x0016)
+#define IMX471_CHIP_ID 0x0471
+
+/* V_TIMING internal */
+#define IMX471_REG_FLL CCI_REG16(0x0340)
+#define IMX471_FLL_MAX 0xffff
+
+/* Exposure control */
+#define IMX471_REG_EXPOSURE CCI_REG16(0x0202)
+#define IMX471_EXPOSURE_MIN 1
+#define IMX471_EXPOSURE_STEP 1
+#define IMX471_EXPOSURE_DEFAULT 0x04f6
+
+/*
+ * the digital control register for all color control looks like:
+ * +-----------------+------------------+
+ * | [7:0] | [15:8] |
+ * +-----------------+------------------+
+ * | 0x020f | 0x020e |
+ * --------------------------------------
+ * it is used to calculate the digital gain times value(integral + fractional)
+ * the [15:8] bits is the fractional part and [7:0] bits is the integral
+ * calculation equation is:
+ * gain value (unit: times) = REG[15:8] + REG[7:0]/0x100
+ * Only value in 0x0100 ~ 0x0FFF range is allowed.
+ * Analog gain use 10 bits in the registers and allowed range is 0 ~ 960
+ */
+/* Analog gain control */
+#define IMX471_REG_ANALOG_GAIN CCI_REG16(0x0204)
+#define IMX471_ANA_GAIN_MIN 0
+#define IMX471_ANA_GAIN_MAX 960
+#define IMX471_ANA_GAIN_STEP 1
+#define IMX471_ANA_GAIN_DEFAULT 0
+
+/* Digital gain control */
+#define IMX471_REG_DPGA_USE_GLOBAL_GAIN CCI_REG16(0x3ff9)
+#define IMX471_REG_DIG_GAIN_GLOBAL CCI_REG16(0x020e)
+#define IMX471_DGTL_GAIN_MIN 256
+#define IMX471_DGTL_GAIN_MAX 4095
+#define IMX471_DGTL_GAIN_STEP 1
+#define IMX471_DGTL_GAIN_DEFAULT 256
+
+#define IMX471_VALUE_08BIT 1
+
+/* HFLIP and VFLIP control */
+#define IMX471_REG_ORIENTATION CCI_REG8(0x0101)
+#define IMX471_HFLIP_BIT BIT(0)
+#define IMX471_VFLIP_BIT BIT(1)
+
+/* Default exposure margin */
+#define IMX471_EXPOSURE_MARGIN 18
+
+/* Horizontal crop window offset */
+#define IMX471_REG_H_WIN_OFFSET CCI_REG8(0x0409)
+
+/* Vertical crop window offset */
+#define IMX471_REG_V_WIN_OFFSET CCI_REG8(0x034b)
+
+/* Test Pattern Control */
+#define IMX471_REG_TEST_PATTERN CCI_REG8(0x0600)
+#define IMX471_TEST_PATTERN_DISABLED 0
+#define IMX471_TEST_PATTERN_SOLID_COLOR 1
+#define IMX471_TEST_PATTERN_COLOR_BARS 2
+#define IMX471_TEST_PATTERN_GRAY_COLOR_BARS 3
+#define IMX471_TEST_PATTERN_PN9 4
+
+/* default link frequency and external clock */
+#define IMX471_LINK_FREQ_DEFAULT 200000000LL
+#define IMX471_EXT_CLK 19200000
+#define IMX471_LINK_FREQ_INDEX 0
+
+#define to_imx471_data(_sd) container_of_const(_sd, \
+ struct imx471_data, sd)
+
+/* Mode : resolution and related config&values */
+struct imx471_mode {
+ /* Frame width */
+ u32 width;
+ /* Frame height */
+ u32 height;
+
+ /* V-timing */
+ u32 fll_def;
+ u32 fll_min;
+
+ /* H-timing */
+ u32 llp;
+
+ /* index of link frequency */
+ u32 link_freq_index;
+
+ /* Default register values */
+ const struct cci_reg_sequence *default_mode_regs;
+ const int default_mode_regs_length;
+};
+
+struct imx471_data {
+ struct v4l2_subdev sd;
+ struct media_pad pad;
+
+ struct v4l2_ctrl_handler ctrl_handler;
+ /* V4L2 Controls */
+ struct v4l2_ctrl *link_freq;
+ struct v4l2_ctrl *pixel_rate;
+ struct v4l2_ctrl *vblank;
+ struct v4l2_ctrl *hblank;
+ struct v4l2_ctrl *exposure;
+
+ struct gpio_desc *reset_gpio;
+ struct regulator *avdd;
+ struct clk *img_clk;
+
+ struct device *dev;
+ struct regmap *regmap;
+
+ /* Current mode */
+ const struct imx471_mode *cur_mode;
+
+ int streaming;
+ int rotation;
+ int hflip_initialized;
+
+ /*
+ * Mutex for serialized access:
+ * Protect sensor set pad format and start/stop streaming safely.
+ * Protect access to sensor v4l2 controls.
+ */
+ struct mutex lock;
+
+ /* True if the device has been identified */
+ bool identified;
+};
+
+static const struct cci_reg_sequence imx471_global_regs[] = {
+ { CCI_REG8(0x0136), 0x13 },
+ { CCI_REG8(0x0137), 0x33 },
+ { CCI_REG8(0x3c7e), 0x08 },
+ { CCI_REG8(0x3c7f), 0x05 },
+ { CCI_REG8(0x3e35), 0x00 },
+ { CCI_REG8(0x3e36), 0x00 },
+ { CCI_REG8(0x3e37), 0x00 },
+ { CCI_REG8(0x3f7f), 0x01 },
+ { CCI_REG8(0x4431), 0x04 },
+ { CCI_REG8(0x531c), 0x01 },
+ { CCI_REG8(0x531d), 0x02 },
+ { CCI_REG8(0x531e), 0x04 },
+ { CCI_REG8(0x5928), 0x00 },
+ { CCI_REG8(0x5929), 0x2f },
+ { CCI_REG8(0x592a), 0x00 },
+ { CCI_REG8(0x592b), 0x85 },
+ { CCI_REG8(0x592c), 0x00 },
+ { CCI_REG8(0x592d), 0x32 },
+ { CCI_REG8(0x592e), 0x00 },
+ { CCI_REG8(0x592f), 0x88 },
+ { CCI_REG8(0x5930), 0x00 },
+ { CCI_REG8(0x5931), 0x3d },
+ { CCI_REG8(0x5932), 0x00 },
+ { CCI_REG8(0x5933), 0x93 },
+ { CCI_REG8(0x5938), 0x00 },
+ { CCI_REG8(0x5939), 0x24 },
+ { CCI_REG8(0x593a), 0x00 },
+ { CCI_REG8(0x593b), 0x7a },
+ { CCI_REG8(0x593c), 0x00 },
+ { CCI_REG8(0x593d), 0x24 },
+ { CCI_REG8(0x593e), 0x00 },
+ { CCI_REG8(0x593f), 0x7a },
+ { CCI_REG8(0x5940), 0x00 },
+ { CCI_REG8(0x5941), 0x2f },
+ { CCI_REG8(0x5942), 0x00 },
+ { CCI_REG8(0x5943), 0x85 },
+ { CCI_REG8(0x5f0e), 0x6e },
+ { CCI_REG8(0x5f11), 0xc6 },
+ { CCI_REG8(0x5f17), 0x5e },
+ { CCI_REG8(0x7990), 0x01 },
+ { CCI_REG8(0x7993), 0x5d },
+ { CCI_REG8(0x7994), 0x5d },
+ { CCI_REG8(0x7995), 0xa1 },
+ { CCI_REG8(0x799a), 0x01 },
+ { CCI_REG8(0x799d), 0x00 },
+ { CCI_REG8(0x8169), 0x01 },
+ { CCI_REG8(0x8359), 0x01 },
+ { CCI_REG8(0x9302), 0x1e },
+ { CCI_REG8(0x9306), 0x1f },
+ { CCI_REG8(0x930a), 0x26 },
+ { CCI_REG8(0x930e), 0x23 },
+ { CCI_REG8(0x9312), 0x23 },
+ { CCI_REG8(0x9316), 0x2c },
+ { CCI_REG8(0x9317), 0x19 },
+ { CCI_REG8(0xb046), 0x01 },
+ { CCI_REG8(0xb048), 0x01 },
+};
+
+static const struct cci_reg_sequence mode_1928x1088_regs[] = {
+ { CCI_REG8(0x0101), 0x00 },
+ { CCI_REG8(0x0112), 0x0a },
+ { CCI_REG8(0x0113), 0x0a },
+ { CCI_REG8(0x0114), 0x03 },
+ { CCI_REG8(0x0342), 0x0a },
+ { CCI_REG8(0x0343), 0x00 },
+ { CCI_REG8(0x0340), 0x13 },
+ { CCI_REG8(0x0341), 0xb0 },
+ { CCI_REG8(0x0344), 0x00 },
+ { CCI_REG8(0x0345), 0x00 },
+ { CCI_REG8(0x0346), 0x01 },
+ { CCI_REG8(0x0347), 0xbc },
+ { CCI_REG8(0x0348), 0x12 },
+ { CCI_REG8(0x0349), 0x2f },
+ { CCI_REG8(0x034a), 0x0b },
+ { CCI_REG8(0x034b), 0xeb },
+ { CCI_REG8(0x0381), 0x01 },
+ { CCI_REG8(0x0383), 0x01 },
+ { CCI_REG8(0x0385), 0x01 },
+ { CCI_REG8(0x0387), 0x01 },
+ { CCI_REG8(0x0900), 0x01 },
+ { CCI_REG8(0x0901), 0x22 },
+ { CCI_REG8(0x0902), 0x08 },
+ { CCI_REG8(0x3f4c), 0x81 },
+ { CCI_REG8(0x3f4d), 0x81 },
+ { CCI_REG8(0x0408), 0x00 },
+ { CCI_REG8(0x0409), 0xc8 },
+ { CCI_REG8(0x040a), 0x00 },
+ { CCI_REG8(0x040b), 0x6c },
+ { CCI_REG8(0x040c), 0x07 },
+ { CCI_REG8(0x040d), 0x88 },
+ { CCI_REG8(0x040e), 0x04 },
+ { CCI_REG8(0x040f), 0x40 },
+ { CCI_REG8(0x034c), 0x07 },
+ { CCI_REG8(0x034d), 0x88 },
+ { CCI_REG8(0x034e), 0x04 },
+ { CCI_REG8(0x034f), 0x40 },
+ { CCI_REG8(0x0301), 0x06 },
+ { CCI_REG8(0x0303), 0x02 },
+ { CCI_REG8(0x0305), 0x02 },
+ { CCI_REG8(0x0306), 0x00 },
+ { CCI_REG8(0x0307), 0x79 },
+ { CCI_REG8(0x030b), 0x01 },
+ { CCI_REG8(0x030d), 0x02 },
+ { CCI_REG8(0x030e), 0x00 },
+ { CCI_REG8(0x030f), 0x53 },
+ { CCI_REG8(0x0310), 0x01 },
+ { CCI_REG8(0x0202), 0x13 },
+ { CCI_REG8(0x0203), 0x9e },
+ { CCI_REG8(0x0204), 0x00 },
+ { CCI_REG8(0x0205), 0x00 },
+ { CCI_REG8(0x020e), 0x01 },
+ { CCI_REG8(0x020f), 0x00 },
+ { CCI_REG8(0x3f78), 0x01 },
+ { CCI_REG8(0x3f79), 0x31 },
+ { CCI_REG8(0x3ffe), 0x00 },
+ { CCI_REG8(0x3fff), 0x8a },
+ { CCI_REG8(0x5f0a), 0xb6 },
+};
+
+static const char * const imx471_test_pattern_menu[] = {
+ "Disabled",
+ "Solid Colour",
+ "Eight Vertical Colour Bars",
+ "Colour Bars With Fade to Grey",
+ "Pseudorandom Sequence (PN9)",
+};
+
+/*
+ * When adding more than the one below, make sure the disallowed ones will
+ * actually be disabled in the LINK_FREQ control.
+ */
+static const s64 link_freq_menu_items[] = {
+ IMX471_LINK_FREQ_DEFAULT,
+};
+
+/* Mode configs */
+static const struct imx471_mode supported_modes[] = {
+ {
+ .width = 1928,
+ .height = 1088,
+ .fll_def = 1308,
+ .fll_min = 1308,
+ .llp = 2328,
+ .link_freq_index = IMX471_LINK_FREQ_INDEX,
+ .default_mode_regs = mode_1928x1088_regs,
+ .default_mode_regs_length = ARRAY_SIZE(mode_1928x1088_regs),
+ },
+};
+
+static int imx471_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct imx471_data *sensor = to_imx471_data(sd);
+ struct v4l2_mbus_framefmt *try_fmt =
+ v4l2_subdev_state_get_format(fh->state, 0);
+
+ /* Initialize try_fmt */
+ try_fmt->width = sensor->cur_mode->width;
+ try_fmt->height = sensor->cur_mode->height;
+ try_fmt->code = MEDIA_BUS_FMT_SRGGB10_1X10;
+ try_fmt->field = V4L2_FIELD_NONE;
+
+ return 0;
+}
+
+static int imx471_update_flip(struct imx471_data *sensor, u32 value,
+ u8 flip_bit)
+{
+ int ret;
+ u64 val = value ? flip_bit : 0;
+
+ if (sensor->streaming)
+ return -EBUSY;
+
+ /* hflip */
+ /*
+ * Some manufacturers mount the sensor upside-down (rotation == 180).
+ * V4L2 sets both h/vflip to 1 for 180-degree rotation, but only the
+ * vflip should actually be applied. Skip the initial hflip write to
+ * preserve correct orientation.
+ */
+ if (flip_bit == IMX471_HFLIP_BIT) {
+ if (sensor->rotation == 180 && !sensor->hflip_initialized) {
+ sensor->hflip_initialized = true;
+ return 0;
+ }
+
+ cci_update_bits(sensor->regmap, IMX471_REG_ORIENTATION,
+ flip_bit, val, &ret);
+
+ return ret;
+ }
+
+ /* vflip */
+ cci_update_bits(sensor->regmap, IMX471_REG_ORIENTATION,
+ flip_bit, val, &ret);
+ if (ret)
+ return ret;
+
+ cci_write(sensor->regmap, IMX471_REG_V_WIN_OFFSET,
+ value ? 0xe0 : 0xeb, &ret);
+ if (ret)
+ return ret;
+
+ cci_update_bits(sensor->regmap, IMX471_REG_H_WIN_OFFSET, 1,
+ value ? 0x01 : 0x00, &ret);
+ return ret;
+}
+
+static int imx471_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct imx471_data *sensor = container_of(ctrl->handler,
+ struct imx471_data,
+ ctrl_handler);
+ s64 max;
+ int ret;
+
+ /* Propagate change of current control to all related controls */
+ if (ctrl->id == V4L2_CID_VBLANK) {
+ /* Update max exposure while meeting expected vblanking */
+ max = sensor->cur_mode->height + ctrl->val -
+ IMX471_EXPOSURE_MARGIN;
+ __v4l2_ctrl_modify_range(sensor->exposure,
+ sensor->exposure->minimum,
+ max, sensor->exposure->step, max);
+ }
+
+ /* V4L2 controls values will be applied only when power is already up */
+ if (!pm_runtime_get_if_in_use(sensor->dev))
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_ANALOGUE_GAIN:
+ cci_write(sensor->regmap, IMX471_REG_ANALOG_GAIN,
+ ctrl->val, &ret);
+ break;
+ case V4L2_CID_DIGITAL_GAIN:
+ cci_write(sensor->regmap, IMX471_REG_DIG_GAIN_GLOBAL,
+ ctrl->val, &ret);
+ break;
+ case V4L2_CID_EXPOSURE:
+ cci_write(sensor->regmap, IMX471_REG_EXPOSURE,
+ ctrl->val, &ret);
+ break;
+ case V4L2_CID_VBLANK:
+ /* Update FLL that meets expected vertical blanking */
+ cci_write(sensor->regmap, IMX471_REG_FLL,
+ sensor->cur_mode->height + ctrl->val, &ret);
+ break;
+ case V4L2_CID_TEST_PATTERN:
+ cci_write(sensor->regmap, IMX471_REG_TEST_PATTERN,
+ ctrl->val, &ret);
+ break;
+
+ case V4L2_CID_HFLIP:
+ ret = imx471_update_flip(sensor, ctrl->val, IMX471_HFLIP_BIT);
+ break;
+
+ case V4L2_CID_VFLIP:
+ ret = imx471_update_flip(sensor, ctrl->val, IMX471_VFLIP_BIT);
+ break;
+
+ default:
+ ret = -EINVAL;
+ dev_info(sensor->dev, "ctrl(id:0x%x,val:0x%x) is not handled",
+ ctrl->id, ctrl->val);
+ break;
+ }
+
+ pm_runtime_put(sensor->dev);
+
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops imx471_ctrl_ops = {
+ .s_ctrl = imx471_set_ctrl,
+};
+
+static int imx471_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_SRGGB10_1X10;
+
+ return 0;
+}
+
+static int imx471_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))
+ 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 void imx471_update_pad_format(struct imx471_data *sensor,
+ const struct imx471_mode *mode,
+ struct v4l2_subdev_format *fmt)
+{
+ fmt->format.width = mode->width;
+ fmt->format.height = mode->height;
+ fmt->format.code = MEDIA_BUS_FMT_SRGGB10_1X10;
+ fmt->format.field = V4L2_FIELD_NONE;
+}
+
+static int
+imx471_set_pad_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_format *fmt)
+{
+ struct imx471_data *sensor = to_imx471_data(sd);
+ const struct imx471_mode *mode;
+ s32 vblank_def;
+ s32 vblank_min;
+ s64 h_blank;
+ u64 pixel_rate;
+ u32 height;
+
+ fmt->format.code = MEDIA_BUS_FMT_SRGGB10_1X10;
+
+ mode = v4l2_find_nearest_size(supported_modes,
+ ARRAY_SIZE(supported_modes),
+ width, height,
+ fmt->format.width, fmt->format.height);
+
+ imx471_update_pad_format(sensor, mode, fmt);
+
+ *v4l2_subdev_state_get_format(sd_state, fmt->pad) = fmt->format;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
+ return 0;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE && sensor->streaming)
+ return -EBUSY;
+
+ sensor->cur_mode = mode;
+ pixel_rate = IMX471_LINK_FREQ_DEFAULT * 2 * 4;
+ do_div(pixel_rate, 10);
+ __v4l2_ctrl_s_ctrl_int64(sensor->pixel_rate, pixel_rate);
+
+ /* Update limits and set FPS to default */
+ height = sensor->cur_mode->height;
+ vblank_def = sensor->cur_mode->fll_def - height;
+ vblank_min = sensor->cur_mode->fll_min - height;
+ height = IMX471_FLL_MAX - height;
+
+ __v4l2_ctrl_modify_range(sensor->vblank, vblank_min, height, 1,
+ vblank_def);
+ __v4l2_ctrl_s_ctrl(sensor->vblank, vblank_def);
+ h_blank = mode->llp - sensor->cur_mode->width;
+ /*
+ * Currently hblank is not changeable.
+ * So FPS control is done only by vblank.
+ */
+ __v4l2_ctrl_modify_range(sensor->hblank, h_blank,
+ h_blank, 1, h_blank);
+
+ return 0;
+}
+
+static int imx471_identify_module(struct imx471_data *sensor)
+{
+ int ret;
+ u64 val;
+
+ if (sensor->identified)
+ return 0;
+
+ ret = cci_read(sensor->regmap, IMX471_REG_CHIP_ID, &val, NULL);
+ if (ret)
+ return dev_err_probe(sensor->dev, ret,
+ "failed to read chip id\n");
+
+ if (val != IMX471_CHIP_ID)
+ return dev_err_probe(sensor->dev, -EIO,
+ "chip id mismatch: %x!=%llx\n",
+ IMX471_CHIP_ID, val);
+
+ sensor->identified = true;
+
+ return 0;
+}
+
+static int imx471_pm_suspend(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct imx471_data *sensor = to_imx471_data(sd);
+
+ clk_disable_unprepare(sensor->img_clk);
+ gpiod_set_value_cansleep(sensor->reset_gpio, 1);
+ if (sensor->avdd)
+ regulator_disable(sensor->avdd);
+
+ return 0;
+}
+
+static int imx471_pm_resume(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct imx471_data *sensor = to_imx471_data(sd);
+ int ret;
+
+ if (sensor->avdd) {
+ ret = regulator_enable(sensor->avdd);
+ if (ret < 0) {
+ dev_err(dev, "failed to enable avdd: %d", ret);
+ return ret;
+ }
+ }
+
+ ret = clk_prepare_enable(sensor->img_clk);
+ if (ret < 0) {
+ dev_err(dev, "failed to enable imaging clock: %d", ret);
+ return ret;
+ }
+
+ gpiod_set_value_cansleep(sensor->reset_gpio, 0);
+
+ usleep_range(10000, 15000);
+
+ return 0;
+}
+
+/* Start streaming */
+static int imx471_enable_stream(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ u32 pad, u64 streams_mask)
+{
+ struct imx471_data *sensor = to_imx471_data(sd);
+ int ret;
+
+ ret = pm_runtime_resume_and_get(sensor->dev);
+ if (ret) {
+ dev_err(sensor->dev, "power-up err.\n");
+ goto error_powerdown;
+ }
+
+ ret = imx471_identify_module(sensor);
+ if (ret)
+ return ret;
+
+ /* Global Setting */
+ cci_multi_reg_write(sensor->regmap, imx471_global_regs,
+ ARRAY_SIZE(imx471_global_regs), &ret);
+ if (ret) {
+ dev_err(sensor->dev, "failed to set global settings");
+ goto error_powerdown;
+ }
+
+ /* Apply default values of current mode */
+ cci_multi_reg_write(sensor->regmap, sensor->cur_mode->default_mode_regs,
+ sensor->cur_mode->default_mode_regs_length, &ret);
+ if (ret) {
+ dev_err(sensor->dev, "failed to set mode");
+ goto error_powerdown;
+ }
+
+ /* set digital gain control to all color mode */
+ cci_write(sensor->regmap, IMX471_REG_DPGA_USE_GLOBAL_GAIN, 1, &ret);
+ if (ret)
+ goto error_powerdown;
+
+ /* Apply customized values from user */
+ ret = __v4l2_ctrl_handler_setup(&sensor->ctrl_handler);
+ if (ret)
+ goto error_powerdown;
+
+ cci_write(sensor->regmap, IMX471_REG_MODE_SELECT,
+ IMX471_MODE_STREAMING, &ret);
+ if (ret)
+ goto error_powerdown;
+
+ sensor->streaming = 1;
+
+ return ret;
+
+error_powerdown:
+ pm_runtime_put(sensor->dev);
+
+ return ret;
+}
+
+/* Stop streaming */
+static int imx471_disable_stream(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ u32 pad, u64 streams_mask)
+{
+ struct imx471_data *sensor = to_imx471_data(sd);
+ int ret;
+
+ cci_write(sensor->regmap, IMX471_REG_MODE_SELECT,
+ IMX471_MODE_STANDBY, &ret);
+ pm_runtime_put(sensor->dev);
+ sensor->streaming = 0;
+ sensor->hflip_initialized = false;
+
+ if (ret)
+ dev_err(sensor->dev,
+ "failed to disable stream with return value: %d\n",
+ ret);
+
+ return 0;
+}
+
+static const struct v4l2_subdev_core_ops imx471_subdev_core_ops = {
+ .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+ .unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
+static const struct v4l2_subdev_video_ops imx471_video_ops = {
+ .s_stream = v4l2_subdev_s_stream_helper,
+};
+
+static const struct v4l2_subdev_pad_ops imx471_pad_ops = {
+ .enum_mbus_code = imx471_enum_mbus_code,
+ .get_fmt = v4l2_subdev_get_fmt,
+ .set_fmt = imx471_set_pad_format,
+ .enum_frame_size = imx471_enum_frame_size,
+ .enable_streams = imx471_enable_stream,
+ .disable_streams = imx471_disable_stream,
+};
+
+static const struct v4l2_subdev_ops imx471_subdev_ops = {
+ .core = &imx471_subdev_core_ops,
+ .video = &imx471_video_ops,
+ .pad = &imx471_pad_ops,
+};
+
+static const struct media_entity_operations imx471_subdev_entity_ops = {
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+static const struct v4l2_subdev_internal_ops imx471_internal_ops = {
+ .open = imx471_open,
+};
+
+/* Initialize control handlers */
+static int imx471_init_controls(struct imx471_data *sensor)
+{
+ struct v4l2_ctrl_handler *ctrl_hdlr;
+ struct v4l2_fwnode_device_properties props;
+
+ s64 exposure_max;
+ s64 vblank_def;
+ s64 vblank_min;
+ s64 hblank;
+ u64 pixel_rate;
+ const struct imx471_mode *mode;
+ u32 max;
+ int ret;
+
+ ctrl_hdlr = &sensor->ctrl_handler;
+ ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10);
+ if (ret)
+ return ret;
+
+ ctrl_hdlr->lock = &sensor->lock;
+ max = ARRAY_SIZE(link_freq_menu_items) - 1;
+ sensor->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &imx471_ctrl_ops,
+ V4L2_CID_LINK_FREQ, max, 0,
+ link_freq_menu_items);
+ if (sensor->link_freq)
+ sensor->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+ /* pixel_rate = link_freq * 2 * nr_of_lanes / bits_per_sample */
+ pixel_rate = IMX471_LINK_FREQ_DEFAULT * 2 * 4;
+ do_div(pixel_rate, 10);
+ /* By default, PIXEL_RATE is read only */
+ sensor->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx471_ctrl_ops,
+ V4L2_CID_PIXEL_RATE, pixel_rate,
+ pixel_rate, 1, pixel_rate);
+
+ /* Initial vblank/hblank/exposure parameters based on current mode */
+ mode = sensor->cur_mode;
+ vblank_def = mode->fll_def - mode->height;
+ vblank_min = mode->fll_min - mode->height;
+ sensor->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx471_ctrl_ops,
+ V4L2_CID_VBLANK, vblank_min,
+ IMX471_FLL_MAX - mode->height,
+ 1, vblank_def);
+
+ hblank = mode->llp - mode->width;
+ sensor->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx471_ctrl_ops,
+ V4L2_CID_HBLANK, hblank, hblank,
+ 1, hblank);
+ if (sensor->hblank)
+ sensor->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+ /* fll >= exposure time + adjust parameter (default value is 18) */
+ exposure_max = mode->fll_def - IMX471_EXPOSURE_MARGIN;
+ sensor->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &imx471_ctrl_ops,
+ V4L2_CID_EXPOSURE,
+ IMX471_EXPOSURE_MIN, exposure_max,
+ IMX471_EXPOSURE_STEP,
+ IMX471_EXPOSURE_DEFAULT);
+
+ v4l2_ctrl_new_std(ctrl_hdlr, &imx471_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
+ IMX471_ANA_GAIN_MIN, IMX471_ANA_GAIN_MAX,
+ IMX471_ANA_GAIN_STEP, IMX471_ANA_GAIN_DEFAULT);
+
+ /* Digital gain */
+ v4l2_ctrl_new_std(ctrl_hdlr, &imx471_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
+ IMX471_DGTL_GAIN_MIN, IMX471_DGTL_GAIN_MAX,
+ IMX471_DGTL_GAIN_STEP, IMX471_DGTL_GAIN_DEFAULT);
+
+ v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &imx471_ctrl_ops,
+ V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(imx471_test_pattern_menu) - 1,
+ 0, 0, imx471_test_pattern_menu);
+
+ /* HFLIP & VFLIP */
+ v4l2_ctrl_new_std(ctrl_hdlr, &imx471_ctrl_ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+
+ v4l2_ctrl_new_std(ctrl_hdlr, &imx471_ctrl_ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+
+ if (ctrl_hdlr->error) {
+ ret = ctrl_hdlr->error;
+ dev_err(sensor->dev, "%s control init failed: %d",
+ __func__, ret);
+ goto error;
+ }
+
+ ret = v4l2_fwnode_device_parse(sensor->dev, &props);
+ if (ret) {
+ dev_err(sensor->dev, "failed to parse fwnode: %d", ret);
+ return ret;
+ }
+
+ sensor->rotation = props.rotation;
+
+ v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &imx471_ctrl_ops, &props);
+ if (ctrl_hdlr->error)
+ return ctrl_hdlr->error;
+
+ sensor->sd.ctrl_handler = ctrl_hdlr;
+
+ return 0;
+
+error:
+ v4l2_ctrl_handler_free(ctrl_hdlr);
+
+ return ret;
+}
+
+static int imx471_get_pm_resources(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct imx471_data *sensor = to_imx471_data(sd);
+
+ 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");
+ }
+
+ fsleep(1000);
+
+ sensor->avdd = devm_regulator_get(dev, "avdd");
+ if (IS_ERR(sensor->avdd)) {
+ return dev_err_probe(dev, PTR_ERR(sensor->avdd),
+ "failed to get avdd regulator\n");
+ }
+
+ sensor->img_clk = devm_clk_get_optional(dev, NULL);
+ if (IS_ERR(sensor->img_clk))
+ return dev_err_probe(dev, PTR_ERR(sensor->img_clk),
+ "failed to get imaging clock\n");
+
+ return 0;
+}
+
+static int imx471_check_hwcfg(struct imx471_data *sensor)
+{
+ struct v4l2_fwnode_endpoint bus_cfg = {
+ .bus_type = V4L2_MBUS_CSI2_DPHY,
+ };
+ struct fwnode_handle *ep, *fwnode = dev_fwnode(sensor->dev);
+ unsigned long link_freq_bitmap;
+ int ret;
+ u32 ext_clk;
+
+ /*
+ * The fwnode graph may be initialized by the bridge driver,
+ * wait for this.
+ */
+ ep = fwnode_graph_get_endpoint_by_id(fwnode, 0, 0, 0);
+ if (!ep)
+ return dev_err_probe(sensor->dev, -EPROBE_DEFER,
+ "waiting for fwnode graph endpoint\n");
+
+ ret = fwnode_property_read_u32(dev_fwnode(sensor->dev),
+ "clock-frequency", &ext_clk);
+ if (ret) {
+ fwnode_handle_put(ep);
+ return dev_err_probe(sensor->dev, ret,
+ "can't get clock frequency\n");
+ }
+
+ if (ext_clk != IMX471_EXT_CLK) {
+ fwnode_handle_put(ep);
+ return dev_err_probe(sensor->dev, -EINVAL,
+ "external clock %u is not supported\n",
+ ext_clk);
+ }
+
+ ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
+ fwnode_handle_put(ep);
+ if (ret)
+ return dev_err_probe(sensor->dev, ret,
+ "parsing endpoint failed");
+
+ ret = v4l2_link_freq_to_bitmap(sensor->dev, bus_cfg.link_frequencies,
+ bus_cfg.nr_of_link_frequencies,
+ link_freq_menu_items,
+ ARRAY_SIZE(link_freq_menu_items),
+ &link_freq_bitmap);
+
+ if (ret == -ENOENT)
+ goto check_hwcfg_error;
+
+ if (ret == -ENODATA)
+ goto check_hwcfg_error;
+
+check_hwcfg_error:
+ v4l2_fwnode_endpoint_free(&bus_cfg);
+
+ return ret;
+}
+
+static int imx471_probe(struct i2c_client *client)
+{
+ struct imx471_data *sensor;
+ bool full_power;
+ int ret;
+
+ sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL);
+ if (!sensor)
+ return dev_err_probe(&client->dev, -ENOMEM,
+ "failed to allocate memory\n");
+
+ sensor->dev = &client->dev;
+
+ /* Check HW config */
+ ret = imx471_check_hwcfg(sensor);
+ if (ret)
+ return dev_err_probe(sensor->dev, ret,
+ "failed to check hwcfg: %d\n", ret);
+
+ mutex_init(&sensor->lock);
+
+ /* Initialize subdev */
+ v4l2_i2c_subdev_init(&sensor->sd, client, &imx471_subdev_ops);
+
+ ret = imx471_get_pm_resources(sensor->dev);
+ if (ret)
+ return dev_err_probe(sensor->dev, ret,
+ "failed to get pm resources\n");
+
+ /* Initialize regmap */
+ sensor->regmap = devm_cci_regmap_init_i2c(client, 16);
+ if (IS_ERR(sensor->regmap))
+ return PTR_ERR(sensor->regmap);
+
+ ret = imx471_pm_resume(sensor->dev);
+ if (ret)
+ return dev_err_probe(sensor->dev, ret,
+ "failed to power on\n");
+
+ /* Check module identity */
+ ret = imx471_identify_module(sensor);
+ if (ret) {
+ dev_err(&client->dev, "failed to find sensor: %d", ret);
+ goto probe_error_power_off;
+ }
+
+ /* Set default mode to max resolution */
+ sensor->cur_mode = &supported_modes[0];
+
+ ret = imx471_init_controls(sensor);
+ if (ret) {
+ dev_err(sensor->dev, "failed to init controls: %d", ret);
+ goto probe_error_power_off;
+ }
+
+ /* Initialize subdev */
+ sensor->sd.internal_ops = &imx471_internal_ops;
+ sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
+ V4L2_SUBDEV_FL_HAS_EVENTS;
+ sensor->sd.entity.ops = &imx471_subdev_entity_ops;
+ sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+
+ /* Initialize source pad */
+ sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
+ ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
+ if (ret) {
+ dev_err(&client->dev, "failed to init entity pads: %d", ret);
+ goto probe_error_v4l2_ctrl_handler_free;
+ }
+
+ sensor->sd.state_lock = sensor->ctrl_handler.lock;
+ ret = v4l2_subdev_init_finalize(&sensor->sd);
+ if (ret < 0) {
+ dev_err(&client->dev, "failed to init subdev: %d", ret);
+ goto probe_error_media_entity_pm;
+ }
+
+ /* Set the device's state to active if it's in D0 state. */
+ if (full_power)
+ pm_runtime_set_active(sensor->dev);
+ pm_runtime_enable(sensor->dev);
+ pm_runtime_idle(sensor->dev);
+
+ ret = v4l2_async_register_subdev_sensor(&sensor->sd);
+ if (ret < 0)
+ goto probe_error_v4l2_subdev_cleanup;
+
+ return 0;
+
+probe_error_v4l2_subdev_cleanup:
+ pm_runtime_disable(sensor->dev);
+ pm_runtime_set_suspended(sensor->dev);
+ v4l2_subdev_cleanup(&sensor->sd);
+
+probe_error_media_entity_pm:
+ media_entity_cleanup(&sensor->sd.entity);
+
+probe_error_v4l2_ctrl_handler_free:
+ v4l2_ctrl_handler_free(sensor->sd.ctrl_handler);
+
+probe_error_power_off:
+ imx471_pm_suspend(sensor->dev);
+
+ return ret;
+}
+
+static void imx471_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct imx471_data *sensor = to_imx471_data(sd);
+
+ v4l2_async_unregister_subdev(sd);
+ v4l2_subdev_cleanup(sd);
+ media_entity_cleanup(&sd->entity);
+ v4l2_ctrl_handler_free(sd->ctrl_handler);
+
+ pm_runtime_disable(&client->dev);
+
+ if (!pm_runtime_status_suspended(sensor->dev)) {
+ imx471_pm_suspend(sensor->dev);
+ pm_runtime_set_suspended(sensor->dev);
+ }
+}
+
+static DEFINE_RUNTIME_DEV_PM_OPS(imx471_pm_ops, imx471_pm_suspend,
+ imx471_pm_resume, NULL);
+
+static const struct acpi_device_id imx471_acpi_ids[] __maybe_unused = {
+ { "SONY471A" },
+ { "TBE20A0" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(acpi, imx471_acpi_ids);
+
+static struct i2c_driver imx471_i2c_driver = {
+ .driver = {
+ .name = "imx471",
+ .acpi_match_table = ACPI_PTR(imx471_acpi_ids),
+ .pm = pm_sleep_ptr(&imx471_pm_ops),
+ },
+ .probe = imx471_probe,
+ .remove = imx471_remove,
+};
+module_i2c_driver(imx471_i2c_driver);
+
+MODULE_AUTHOR("Jimmy Su <jimmy.su@xxxxxxxxx>");
+MODULE_AUTHOR("Serin Yeh <serin.yeh@xxxxxxxxx>");
+MODULE_AUTHOR("Kate Hsuan <hpa@xxxxxxxxxx>");
+MODULE_DESCRIPTION("Sony imx471 sensor driver");
+MODULE_LICENSE("GPL");
--
2.53.0