[PATCH v2] media: Add t4ka3 camera sensor driver
From: Kate Hsuan
Date: Fri Oct 04 2024 - 04:49:46 EST
Add the t4ka3 driver from:
https://github.com/kitakar5525/surface3-atomisp-cameras.git
With many cleanups / changes (almost a full rewrite) to make it suitable
for upstream:
* Remove the VCM and VCM-OTP support, the mainline kernel models VCMs and
calibration data eeproms as separate v4l2-subdev-s.
* Remove the integration-factor t4ka3_get_intg_factor() support and IOCTL,
this provided info to userspace through an atomisp private IOCTL.
* Turn atomisp specific exposure/gain IOCTL into standard v4l2 controls.
* Use normal ACPI power-management in combination with runtime-pm support
instead of atomisp specific GMIN power-management code.
* Turn into a standard V4L2 sensor driver using
v4l2_async_register_subdev_sensor().
* Add vblank, hblank, and link-freq controls; drop get_frame_interval().
* Use CCI register helpers.
* Calculate values for modes instead of using fixed register-value lists,
allowing arbritrary modes.
* Add get_selection() and set_selection() support
* Add a CSI2 bus configuration check
This been tested on a Xiaomi Mipad2 tablet which has a T4KA3 sensor with
DW9761 VCM as back sensor.
Co-developed-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Kate Hsuan <hpa@xxxxxxxxxx>
---
Changes in v2:
1. The regmap information was obtained before configuring runtime PM so
probe() can return without disabling runtime PM.
2. In t4ka3_s_stream(), return -EBUSY when the streaming is enabled.
---
drivers/media/i2c/Kconfig | 9 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/t4ka3.c | 1119 ++++++++++++++++++++++++++++++++++++
3 files changed, 1129 insertions(+)
create mode 100644 drivers/media/i2c/t4ka3.c
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 8ba096b8ebca..38aba3624669 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -690,6 +690,15 @@ config VIDEO_S5K6A3
This is a V4L2 sensor driver for Samsung S5K6A3 raw
camera sensor.
+config VIDEO_T4KA3
+ tristate "Toshiba T4KA3 sensor support"
+ depends on ACPI || COMPILE_TEST
+ depends on GPIOLIB
+ select V4L2_CCI_I2C
+ help
+ This is a Video4Linux2 sensor driver for the Toshiba T4KA3 8 MP
+ camera sensor.
+
config VIDEO_VGXY61
tristate "ST VGXY61 sensor support"
select V4L2_CCI_I2C
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index fbb988bd067a..ad67ea33ce37 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -129,6 +129,7 @@ obj-$(CONFIG_VIDEO_SAA717X) += saa717x.o
obj-$(CONFIG_VIDEO_SAA7185) += saa7185.o
obj-$(CONFIG_VIDEO_SONY_BTF_MPX) += sony-btf-mpx.o
obj-$(CONFIG_VIDEO_ST_MIPID02) += st-mipid02.o
+obj-$(CONFIG_VIDEO_T4KA3) += t4ka3.o
obj-$(CONFIG_VIDEO_TC358743) += tc358743.o
obj-$(CONFIG_VIDEO_TC358746) += tc358746.o
obj-$(CONFIG_VIDEO_TDA1997X) += tda1997x.o
diff --git a/drivers/media/i2c/t4ka3.c b/drivers/media/i2c/t4ka3.c
new file mode 100644
index 000000000000..d53820434303
--- /dev/null
+++ b/drivers/media/i2c/t4ka3.c
@@ -0,0 +1,1119 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Support for T4KA3 8M camera sensor.
+ *
+ * Copyright (C) 2015 Intel Corporation. All Rights Reserved.
+ * Copyright (C) 2016 XiaoMi, Inc.
+ * Copyright (C) 2024 Hans de Goede <hansg@xxxxxxxxxx>
+ */
+
+#include <linux/acpi.h>
+#include <linux/bits.h>
+#include <linux/delay.h>
+#include <linux/dev_printk.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/mutex.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+
+#include <media/media-entity.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-cci.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+#define T4KA3_NATIVE_WIDTH 3280
+#define T4KA3_NATIVE_HEIGHT 2464
+#define T4KA3_NATIVE_START_LEFT 0
+#define T4KA3_NATIVE_START_TOP 0
+#define T4KA3_ACTIVE_WIDTH 3280
+#define T4KA3_ACTIVE_HEIGHT 2460
+#define T4KA3_ACTIVE_START_LEFT 0
+#define T4KA3_ACTIVE_START_TOP 2
+#define T4KA3_MIN_CROP_WIDTH 2
+#define T4KA3_MIN_CROP_HEIGHT 2
+
+#define T4KA3_PIXELS_PER_LINE 3440
+#define T4KA3_LINES_PER_FRAME_30FPS 2492
+#define T4KA3_FPS 30
+#define T4KA3_PIXEL_RATE \
+ (T4KA3_PIXELS_PER_LINE * T4KA3_LINES_PER_FRAME_30FPS * T4KA3_FPS)
+
+/*
+ * TODO this really should be derived from the 19.2 MHz xvclk combined
+ * with the PLL settings. But without a datasheet this is the closest
+ * approximation possible.
+ *
+ * link-freq = pixel_rate * bpp / (lanes * 2)
+ * (lanes * 2) because CSI lanes use double-data-rate (DDR) signalling.
+ * bpp = 10 and lanes = 4
+ */
+#define T4KA3_LINK_FREQ ((u64)T4KA3_PIXEL_RATE * 10 / 8)
+
+/* For enum_frame_size() full-size + binned-/quarter-size */
+#define T4KA3_FRAME_SIZES 2
+
+
+#define T4KA3_REG_PRODUCT_ID_HIGH CCI_REG8(0x0000)
+#define T4KA3_REG_PRODUCT_ID_LOW CCI_REG8(0x0001)
+#define T4KA3_PRODUCT_ID 0x1490
+
+#define T4KA3_REG_STREAM CCI_REG8(0x0100)
+#define T4KA3_REG_IMG_ORIENTATION CCI_REG8(0x0101)
+#define T4KA3_HFLIP_BIT BIT(0)
+#define T4KA3_VFLIP_BIT BIT(1)
+#define T4KA3_REG_PARAM_HOLD CCI_REG8(0x0104)
+#define T4KA3_REG_COARSE_INTEGRATION_TIME CCI_REG16(0x0202)
+#define T4KA3_COARSE_INTEGRATION_TIME_MARGIN 6
+#define T4KA3_REG_DIGGAIN_GREEN_R CCI_REG16(0x020e)
+#define T4KA3_REG_DIGGAIN_RED CCI_REG16(0x0210)
+#define T4KA3_REG_DIGGAIN_BLUE CCI_REG16(0x0212)
+#define T4KA3_REG_DIGGAIN_GREEN_B CCI_REG16(0x0214)
+#define T4KA3_REG_GLOBAL_GAIN CCI_REG16(0x0234)
+#define T4KA3_MIN_GLOBAL_GAIN_SUPPORTED 0x0080
+#define T4KA3_MAX_GLOBAL_GAIN_SUPPORTED 0x07ff
+#define T4KA3_REG_FRAME_LENGTH_LINES CCI_REG16(0x0340) /* aka VTS */
+/* FIXME: need a datasheet to verify the min + max vblank values */
+#define T4KA3_MIN_VBLANK 4
+#define T4KA3_MAX_VBLANK 0xffff
+#define T4KA3_REG_PIXELS_PER_LINE CCI_REG16(0x0342) /* aka HTS */
+/* These 2 being horz/vert start is a guess (no datasheet), always 0 */
+#define T4KA3_REG_HORZ_START CCI_REG16(0x0344)
+#define T4KA3_REG_VERT_START CCI_REG16(0x0346)
+/* Always 3279 (T4KA3_NATIVE_WIDTH - 1, window is used to crop */
+#define T4KA3_REG_HORZ_END CCI_REG16(0x0348)
+/* Always 2463 (T4KA3_NATIVE_HEIGHT - 1, window is used to crop */
+#define T4KA3_REG_VERT_END CCI_REG16(0x034a)
+/* Output size (after cropping/window) */
+#define T4KA3_REG_HORZ_OUTPUT_SIZE CCI_REG16(0x034c)
+#define T4KA3_REG_VERT_OUTPUT_SIZE CCI_REG16(0x034e)
+/* Window/crop start + size *after* binning */
+#define T4KA3_REG_WIN_START_X CCI_REG16(0x0408)
+#define T4KA3_REG_WIN_START_Y CCI_REG16(0x040a)
+#define T4KA3_REG_WIN_WIDTH CCI_REG16(0x040c)
+#define T4KA3_REG_WIN_HEIGHT CCI_REG16(0x040e)
+#define T4KA3_REG_TEST_PATTERN_MODE CCI_REG8(0x0601)
+/* Unknown register at address 0x0900 */
+#define T4KA3_REG_0900 CCI_REG8(0x0900)
+#define T4KA3_REG_BINNING CCI_REG8(0x0901)
+#define T4KA3_BINNING_VAL(b) (((b) << 4) | (b))
+
+struct t4ka3_ctrls {
+ struct v4l2_ctrl_handler handler;
+ struct v4l2_ctrl *hflip;
+ struct v4l2_ctrl *vflip;
+ struct v4l2_ctrl *vblank;
+ struct v4l2_ctrl *hblank;
+ struct v4l2_ctrl *exposure;
+ struct v4l2_ctrl *test_pattern;
+ struct v4l2_ctrl *link_freq;
+ struct v4l2_ctrl *gain;
+};
+
+struct t4ka3_mode {
+ struct v4l2_rect crop;
+ struct v4l2_mbus_framefmt fmt;
+ int binning;
+ u16 win_x;
+ u16 win_y;
+};
+
+struct t4ka3_data {
+ struct v4l2_subdev sd;
+ struct media_pad pad;
+ struct mutex lock; /* serialize sensor's ioctl */
+ struct t4ka3_ctrls ctrls;
+ struct t4ka3_mode mode;
+ struct device *dev;
+ struct regmap *regmap;
+ struct gpio_desc *powerdown_gpio;
+ struct gpio_desc *reset_gpio;
+ s64 link_freq[1];
+ int streaming;
+};
+
+/* init settings */
+static const struct cci_reg_sequence t4ka3_init_config[] = {
+ {CCI_REG8(0x4136), 0x13},
+ {CCI_REG8(0x4137), 0x33},
+ {CCI_REG8(0x3094), 0x01},
+ {CCI_REG8(0x0233), 0x01},
+ {CCI_REG8(0x4B06), 0x01},
+ {CCI_REG8(0x4B07), 0x01},
+ {CCI_REG8(0x3028), 0x01},
+ {CCI_REG8(0x3032), 0x14},
+ {CCI_REG8(0x305C), 0x0C},
+ {CCI_REG8(0x306D), 0x0A},
+ {CCI_REG8(0x3071), 0xFA},
+ {CCI_REG8(0x307E), 0x0A},
+ {CCI_REG8(0x307F), 0xFC},
+ {CCI_REG8(0x3091), 0x04},
+ {CCI_REG8(0x3092), 0x60},
+ {CCI_REG8(0x3096), 0xC0},
+ {CCI_REG8(0x3100), 0x07},
+ {CCI_REG8(0x3101), 0x4C},
+ {CCI_REG8(0x3118), 0xCC},
+ {CCI_REG8(0x3139), 0x06},
+ {CCI_REG8(0x313A), 0x06},
+ {CCI_REG8(0x313B), 0x04},
+ {CCI_REG8(0x3143), 0x02},
+ {CCI_REG8(0x314F), 0x0E},
+ {CCI_REG8(0x3169), 0x99},
+ {CCI_REG8(0x316A), 0x99},
+ {CCI_REG8(0x3171), 0x05},
+ {CCI_REG8(0x31A1), 0xA7},
+ {CCI_REG8(0x31A2), 0x9C},
+ {CCI_REG8(0x31A3), 0x8F},
+ {CCI_REG8(0x31A4), 0x75},
+ {CCI_REG8(0x31A5), 0xEE},
+ {CCI_REG8(0x31A6), 0xEA},
+ {CCI_REG8(0x31A7), 0xE4},
+ {CCI_REG8(0x31A8), 0xE4},
+ {CCI_REG8(0x31DF), 0x05},
+ {CCI_REG8(0x31EC), 0x1B},
+ {CCI_REG8(0x31ED), 0x1B},
+ {CCI_REG8(0x31EE), 0x1B},
+ {CCI_REG8(0x31F0), 0x1B},
+ {CCI_REG8(0x31F1), 0x1B},
+ {CCI_REG8(0x31F2), 0x1B},
+ {CCI_REG8(0x3204), 0x3F},
+ {CCI_REG8(0x3205), 0x03},
+ {CCI_REG8(0x3210), 0x01},
+ {CCI_REG8(0x3216), 0x68},
+ {CCI_REG8(0x3217), 0x58},
+ {CCI_REG8(0x3218), 0x58},
+ {CCI_REG8(0x321A), 0x68},
+ {CCI_REG8(0x321B), 0x60},
+ {CCI_REG8(0x3238), 0x03},
+ {CCI_REG8(0x3239), 0x03},
+ {CCI_REG8(0x323A), 0x05},
+ {CCI_REG8(0x323B), 0x06},
+ {CCI_REG8(0x3243), 0x03},
+ {CCI_REG8(0x3244), 0x08},
+ {CCI_REG8(0x3245), 0x01},
+ {CCI_REG8(0x3307), 0x19},
+ {CCI_REG8(0x3308), 0x19},
+ {CCI_REG8(0x3320), 0x01},
+ {CCI_REG8(0x3326), 0x15},
+ {CCI_REG8(0x3327), 0x0D},
+ {CCI_REG8(0x3328), 0x01},
+ {CCI_REG8(0x3380), 0x01},
+ {CCI_REG8(0x339E), 0x07},
+ {CCI_REG8(0x3424), 0x00},
+ {CCI_REG8(0x343C), 0x01},
+ {CCI_REG8(0x3398), 0x04},
+ {CCI_REG8(0x343A), 0x10},
+ {CCI_REG8(0x339A), 0x22},
+ {CCI_REG8(0x33B4), 0x00},
+ {CCI_REG8(0x3393), 0x01},
+ {CCI_REG8(0x33B3), 0x6E},
+ {CCI_REG8(0x3433), 0x06},
+ {CCI_REG8(0x3433), 0x00},
+ {CCI_REG8(0x33B3), 0x00},
+ {CCI_REG8(0x3393), 0x03},
+ {CCI_REG8(0x33B4), 0x03},
+ {CCI_REG8(0x343A), 0x00},
+ {CCI_REG8(0x339A), 0x00},
+ {CCI_REG8(0x3398), 0x00}
+};
+
+static const struct cci_reg_sequence t4ka3_pre_mode_set_regs[] = {
+ {CCI_REG8(0x0112), 0x0A},
+ {CCI_REG8(0x0113), 0x0A},
+ {CCI_REG8(0x0114), 0x03},
+ {CCI_REG8(0x4136), 0x13},
+ {CCI_REG8(0x4137), 0x33},
+ {CCI_REG8(0x0820), 0x0A},
+ {CCI_REG8(0x0821), 0x0D},
+ {CCI_REG8(0x0822), 0x00},
+ {CCI_REG8(0x0823), 0x00},
+ {CCI_REG8(0x0301), 0x0A},
+ {CCI_REG8(0x0303), 0x01},
+ {CCI_REG8(0x0305), 0x04},
+ {CCI_REG8(0x0306), 0x02},
+ {CCI_REG8(0x0307), 0x18},
+ {CCI_REG8(0x030B), 0x01},
+};
+
+static const struct cci_reg_sequence t4ka3_post_mode_set_regs[] = {
+ {CCI_REG8(0x0902), 0x00},
+ {CCI_REG8(0x4220), 0x00},
+ {CCI_REG8(0x4222), 0x01},
+ {CCI_REG8(0x3380), 0x01},
+ {CCI_REG8(0x3090), 0x88},
+ {CCI_REG8(0x3394), 0x20},
+ {CCI_REG8(0x3090), 0x08},
+ {CCI_REG8(0x3394), 0x10}
+};
+
+static inline struct t4ka3_data *to_t4ka3_sensor(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct t4ka3_data, sd);
+}
+
+static inline struct t4ka3_data *ctrl_to_t4ka3(struct v4l2_ctrl *ctrl)
+{
+ return container_of(ctrl->handler, struct t4ka3_data, ctrls.handler);
+}
+
+/* T4KA3 default GRBG */
+static const int t4ka3_hv_flip_bayer_order[] = {
+ MEDIA_BUS_FMT_SGRBG10_1X10,
+ MEDIA_BUS_FMT_SBGGR10_1X10,
+ MEDIA_BUS_FMT_SRGGB10_1X10,
+ MEDIA_BUS_FMT_SGBRG10_1X10,
+};
+
+static const struct v4l2_rect t4ka3_default_crop = {
+ .left = T4KA3_ACTIVE_START_LEFT,
+ .top = T4KA3_ACTIVE_START_TOP,
+ .width = T4KA3_ACTIVE_WIDTH,
+ .height = T4KA3_ACTIVE_HEIGHT,
+};
+
+static int t4ka3_detect(struct t4ka3_data *sensor, u16 *id);
+
+static void t4ka3_set_bayer_order(struct t4ka3_data *sensor,
+ struct v4l2_mbus_framefmt *fmt)
+{
+ int hv_flip = 0;
+
+ if (sensor->ctrls.vflip && sensor->ctrls.vflip->val)
+ hv_flip += 1;
+
+ if (sensor->ctrls.hflip && sensor->ctrls.hflip->val)
+ hv_flip += 2;
+
+ fmt->code = t4ka3_hv_flip_bayer_order[hv_flip];
+}
+
+static int t4ka3_update_exposure_range(struct t4ka3_data *sensor)
+{
+ int exp_max = sensor->mode.fmt.height + sensor->ctrls.vblank->val -
+ T4KA3_COARSE_INTEGRATION_TIME_MARGIN;
+
+ return __v4l2_ctrl_modify_range(sensor->ctrls.exposure, 0, exp_max,
+ 1, exp_max);
+}
+
+static struct v4l2_rect *
+__t4ka3_get_pad_crop(struct t4ka3_data *sensor,
+ struct v4l2_subdev_state *state,
+ unsigned int pad,
+ enum v4l2_subdev_format_whence which)
+{
+ if (which == V4L2_SUBDEV_FORMAT_TRY)
+ return v4l2_subdev_state_get_crop(state, pad);
+
+ return &sensor->mode.crop;
+}
+
+static struct v4l2_mbus_framefmt *
+__t4ka3_get_pad_format(struct t4ka3_data *sensor,
+ struct v4l2_subdev_state *sd_state, unsigned int pad,
+ enum v4l2_subdev_format_whence which)
+{
+ if (which == V4L2_SUBDEV_FORMAT_TRY)
+ return v4l2_subdev_state_get_format(sd_state, pad);
+
+ return &sensor->mode.fmt;
+}
+
+static void t4ka3_fill_format(struct t4ka3_data *sensor,
+ struct v4l2_mbus_framefmt *fmt,
+ unsigned int width, unsigned int height)
+{
+ memset(fmt, 0, sizeof(*fmt));
+ fmt->width = width;
+ fmt->height = height;
+ fmt->field = V4L2_FIELD_NONE;
+ fmt->colorspace = V4L2_COLORSPACE_SRGB;
+ t4ka3_set_bayer_order(sensor, fmt);
+}
+
+static void t4ka3_calc_mode(struct t4ka3_data *sensor)
+{
+ int width = sensor->mode.fmt.width;
+ int height = sensor->mode.fmt.height;
+ int binning;
+
+ if (width <= (sensor->mode.crop.width / 2) &&
+ height <= (sensor->mode.crop.height / 2))
+ binning = 2;
+ else
+ binning = 1;
+
+ width *= binning;
+ height *= binning;
+
+ sensor->mode.binning = binning;
+ sensor->mode.win_x = (sensor->mode.crop.left +
+ (sensor->mode.crop.width - width) / 2) & ~1;
+ sensor->mode.win_y = (sensor->mode.crop.top +
+ (sensor->mode.crop.height - height) / 2) & ~1;
+ /*
+ * t4ka's window is done after binning, but must still be a multiple of 2 ?
+ * Round up to avoid top 2 black lines in 1640x1230 (quarter res) case.
+ */
+ sensor->mode.win_x = DIV_ROUND_UP(sensor->mode.win_x, binning);
+ sensor->mode.win_y = DIV_ROUND_UP(sensor->mode.win_y, binning);
+}
+
+static void t4ka3_get_vblank_limits(struct t4ka3_data *sensor, int *min, int *max, int *def)
+{
+ *min = T4KA3_MIN_VBLANK + (sensor->mode.binning - 1) * sensor->mode.fmt.height;
+ *max = T4KA3_MAX_VBLANK - sensor->mode.fmt.height;
+ *def = T4KA3_LINES_PER_FRAME_30FPS - sensor->mode.fmt.height;
+}
+
+static int t4ka3_set_pad_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_format *format)
+{
+ struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+ struct v4l2_mbus_framefmt *try_fmt;
+ const struct v4l2_rect *crop;
+ unsigned int width, height;
+ int min, max, def, ret = 0;
+
+ crop = __t4ka3_get_pad_crop(sensor, sd_state, format->pad, format->which);
+
+ /* Limit set_fmt max size to crop width / height */
+ width = clamp_val(ALIGN(format->format.width, 2),
+ T4KA3_MIN_CROP_WIDTH, crop->width);
+ height = clamp_val(ALIGN(format->format.height, 2),
+ T4KA3_MIN_CROP_HEIGHT, crop->height);
+ t4ka3_fill_format(sensor, &format->format, width, height);
+
+ if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
+ try_fmt = v4l2_subdev_state_get_format(sd_state, 0);
+ *try_fmt = format->format;
+ return 0;
+ }
+
+ mutex_lock(&sensor->lock);
+
+ if (sensor->streaming) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ sensor->mode.fmt = format->format;
+ t4ka3_calc_mode(sensor);
+
+ /* vblank range is height dependent adjust and reset to default */
+ t4ka3_get_vblank_limits(sensor, &min, &max, &def);
+ ret = __v4l2_ctrl_modify_range(sensor->ctrls.vblank, min, max, 1, def);
+ if (ret)
+ goto unlock;
+
+ ret = __v4l2_ctrl_s_ctrl(sensor->ctrls.vblank, def);
+ if (ret)
+ goto unlock;
+
+ def = T4KA3_ACTIVE_WIDTH - sensor->mode.fmt.width;
+ ret = __v4l2_ctrl_modify_range(sensor->ctrls.hblank, def, def, 1, def);
+ if (ret)
+ goto unlock;
+ ret = __v4l2_ctrl_s_ctrl(sensor->ctrls.hblank, def);
+ if (ret)
+ goto unlock;
+
+ /* exposure range depends on vts which may have changed */
+ ret = t4ka3_update_exposure_range(sensor);
+ if (ret)
+ goto unlock;
+
+unlock:
+ mutex_unlock(&sensor->lock);
+ return ret;
+}
+
+/* Horizontal flip the image. */
+static int t4ka3_t_hflip(struct v4l2_subdev *sd, int value)
+{
+ struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+ int ret;
+ u64 val;
+
+ if (sensor->streaming)
+ return -EBUSY;
+
+ val = value ? T4KA3_HFLIP_BIT : 0;
+
+ ret = cci_update_bits(sensor->regmap, T4KA3_REG_IMG_ORIENTATION,
+ T4KA3_HFLIP_BIT, val, NULL);
+ if (ret)
+ return ret;
+
+ t4ka3_set_bayer_order(sensor, &sensor->mode.fmt);
+ return 0;
+}
+
+/* Vertically flip the image */
+static int t4ka3_t_vflip(struct v4l2_subdev *sd, int value)
+{
+ struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+ int ret;
+ u64 val;
+
+ if (sensor->streaming)
+ return -EBUSY;
+
+ val = value ? T4KA3_VFLIP_BIT : 0;
+
+ ret = cci_update_bits(sensor->regmap, T4KA3_REG_IMG_ORIENTATION,
+ T4KA3_VFLIP_BIT, val, NULL);
+ if (ret)
+ return ret;
+
+ t4ka3_set_bayer_order(sensor, &sensor->mode.fmt);
+ return 0;
+}
+
+static int t4ka3_test_pattern(struct t4ka3_data *sensor, s32 value)
+{
+ return cci_write(sensor->regmap, T4KA3_REG_TEST_PATTERN_MODE, value, NULL);
+}
+
+static int t4ka3_detect(struct t4ka3_data *sensor, u16 *id)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd);
+ struct i2c_adapter *adapter = client->adapter;
+ u64 high, low;
+ int ret = 0;
+
+ /* i2c check */
+ if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
+ return -ENODEV;
+
+ /* check sensor chip ID */
+ cci_read(sensor->regmap, T4KA3_REG_PRODUCT_ID_HIGH, &high, &ret);
+ cci_read(sensor->regmap, T4KA3_REG_PRODUCT_ID_LOW, &low, &ret);
+ if (ret)
+ return ret;
+
+ *id = (((u8) high) << 8) | (u8) low;
+ if (*id != T4KA3_PRODUCT_ID) {
+ dev_err(sensor->dev, "main sensor t4ka3 ID error\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int
+t4ka3_s_config(struct v4l2_subdev *sd)
+{
+ struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+ u16 sensor_id;
+ int ret;
+
+ ret = pm_runtime_get_sync(sensor->sd.dev);
+ if (ret) {
+ dev_err(sensor->dev, "t4ka3 power-up err");
+ return ret;
+ }
+
+ ret = t4ka3_detect(sensor, &sensor_id);
+ if (ret) {
+ dev_err(sensor->dev, "Failed to detect sensor.\n");
+ goto fail_detect;
+ }
+
+fail_detect:
+ pm_runtime_put(sensor->sd.dev);
+ return ret;
+}
+
+static int t4ka3_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct t4ka3_data *sensor = ctrl_to_t4ka3(ctrl);
+ int ret;
+
+ /* Update exposure range on vblank changes */
+ if (ctrl->id == V4L2_CID_VBLANK) {
+ ret = t4ka3_update_exposure_range(sensor);
+ if (ret)
+ return ret;
+ }
+
+ /* Only apply changes to the controls if the device is powered up */
+ if (!pm_runtime_get_if_in_use(sensor->sd.dev)) {
+ t4ka3_set_bayer_order(sensor, &sensor->mode.fmt);
+ return 0;
+ }
+
+ switch (ctrl->id) {
+ case V4L2_CID_TEST_PATTERN:
+ ret = t4ka3_test_pattern(sensor, ctrl->val);
+ break;
+ case V4L2_CID_VFLIP:
+ ret = t4ka3_t_vflip(&sensor->sd, ctrl->val);
+ break;
+ case V4L2_CID_HFLIP:
+ ret = t4ka3_t_hflip(&sensor->sd, ctrl->val);
+ break;
+ case V4L2_CID_VBLANK:
+ ret = cci_write(sensor->regmap, T4KA3_REG_FRAME_LENGTH_LINES,
+ sensor->mode.fmt.height + ctrl->val, NULL);
+ break;
+ case V4L2_CID_EXPOSURE:
+ ret = cci_write(sensor->regmap, T4KA3_REG_COARSE_INTEGRATION_TIME,
+ ctrl->val, NULL);
+ break;
+ case V4L2_CID_ANALOGUE_GAIN:
+ ret = cci_write(sensor->regmap, T4KA3_REG_GLOBAL_GAIN,
+ ctrl->val, NULL);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ pm_runtime_put(sensor->sd.dev);
+ return ret;
+}
+
+/* Window/crop start + size *after* binning */
+#define T4KA3_REG_WIN_START_X CCI_REG16(0x0408)
+#define T4KA3_REG_WIN_START_Y CCI_REG16(0x040a)
+#define T4KA3_REG_WIN_WIDTH CCI_REG16(0x040c)
+#define T4KA3_REG_WIN_HEIGHT CCI_REG16(0x040e)
+#define T4KA3_REG_TEST_PATTERN_MODE CCI_REG8(0x0601)
+/* Unknown register at address 0x0900 */
+#define T4KA3_REG_0900 CCI_REG8(0x0900)
+static int t4ka3_set_mode(struct t4ka3_data *sensor)
+{
+ int ret = 0;
+
+ cci_write(sensor->regmap, T4KA3_REG_HORZ_OUTPUT_SIZE, sensor->mode.fmt.width, &ret);
+ /* Write mode-height - 2 otherwise things don't work, hw-bug ? */
+ cci_write(sensor->regmap, T4KA3_REG_VERT_OUTPUT_SIZE, sensor->mode.fmt.height - 2, &ret);
+ /* Note overwritten by __v4l2_ctrl_handler_setup() based on vblank ctrl */
+ cci_write(sensor->regmap, T4KA3_REG_FRAME_LENGTH_LINES, T4KA3_LINES_PER_FRAME_30FPS, &ret);
+ cci_write(sensor->regmap, T4KA3_REG_PIXELS_PER_LINE, T4KA3_PIXELS_PER_LINE, &ret);
+ /* Always use the full sensor, using window to crop */
+ cci_write(sensor->regmap, T4KA3_REG_HORZ_START, 0, &ret);
+ cci_write(sensor->regmap, T4KA3_REG_VERT_START, 0, &ret);
+ cci_write(sensor->regmap, T4KA3_REG_HORZ_END, T4KA3_NATIVE_WIDTH - 1, &ret);
+ cci_write(sensor->regmap, T4KA3_REG_VERT_END, T4KA3_NATIVE_HEIGHT - 1, &ret);
+ /* Set window */
+ cci_write(sensor->regmap, T4KA3_REG_WIN_START_X, sensor->mode.win_x, &ret);
+ cci_write(sensor->regmap, T4KA3_REG_WIN_START_Y, sensor->mode.win_y, &ret);
+ cci_write(sensor->regmap, T4KA3_REG_WIN_WIDTH, sensor->mode.fmt.width, &ret);
+ cci_write(sensor->regmap, T4KA3_REG_WIN_HEIGHT, sensor->mode.fmt.height, &ret);
+ /* Write 1 to unknown register 0x0900 */
+ cci_write(sensor->regmap, T4KA3_REG_0900, 1, &ret);
+ cci_write(sensor->regmap, T4KA3_REG_BINNING, T4KA3_BINNING_VAL(sensor->mode.binning), &ret);
+
+ return ret;
+}
+
+static int t4ka3_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+ int ret;
+
+ mutex_lock(&sensor->lock);
+
+ if (sensor->streaming == enable) {
+ dev_warn(sensor->dev, "Stream already %s\n", enable ? "started" : "stopped");
+ ret = -EBUSY;
+ goto error_unlock;
+ }
+
+ if (enable) {
+ ret = pm_runtime_get_sync(sensor->sd.dev);
+ if (ret) {
+ dev_err(sensor->dev, "power-up err.\n");
+ goto error_unlock;
+ }
+
+ cci_multi_reg_write(sensor->regmap, t4ka3_init_config,
+ ARRAY_SIZE(t4ka3_init_config), &ret);
+ /* enable group hold */
+ cci_write(sensor->regmap, T4KA3_REG_PARAM_HOLD, 1, &ret);
+ cci_multi_reg_write(sensor->regmap, t4ka3_pre_mode_set_regs,
+ ARRAY_SIZE(t4ka3_pre_mode_set_regs), &ret);
+ if (ret)
+ goto error_powerdown;
+
+ ret = t4ka3_set_mode(sensor);
+ if (ret)
+ goto error_powerdown;
+
+ ret = cci_multi_reg_write(sensor->regmap, t4ka3_post_mode_set_regs,
+ ARRAY_SIZE(t4ka3_post_mode_set_regs), NULL);
+ if (ret)
+ goto error_powerdown;
+
+ /* Restore value of all ctrls */
+ ret = __v4l2_ctrl_handler_setup(&sensor->ctrls.handler);
+ if (ret)
+ goto error_powerdown;
+
+ /* disable group hold */
+ cci_write(sensor->regmap, T4KA3_REG_PARAM_HOLD, 0, &ret);
+ cci_write(sensor->regmap, T4KA3_REG_STREAM, 1, &ret);
+ if (ret)
+ goto error_powerdown;
+
+ sensor->streaming = 1;
+ } else {
+ ret = cci_write(sensor->regmap, T4KA3_REG_STREAM, 0, NULL);
+ if (ret)
+ goto error_powerdown;
+
+ ret = pm_runtime_put(sensor->sd.dev);
+ if (ret)
+ goto error_unlock;
+
+ sensor->streaming = 0;
+ }
+
+ mutex_unlock(&sensor->lock);
+ return ret;
+
+error_powerdown:
+ pm_runtime_put(sensor->sd.dev);
+error_unlock:
+ mutex_unlock(&sensor->lock);
+ return ret;
+}
+
+static int t4ka3_get_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_selection *sel)
+{
+ struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+
+ switch (sel->target) {
+ case V4L2_SEL_TGT_CROP:
+ mutex_lock(&sensor->lock);
+ sel->r = *__t4ka3_get_pad_crop(sensor, state, sel->pad,
+ sel->which);
+ mutex_unlock(&sensor->lock);
+ break;
+ case V4L2_SEL_TGT_NATIVE_SIZE:
+ case V4L2_SEL_TGT_CROP_BOUNDS:
+ sel->r.top = 0;
+ sel->r.left = 0;
+ sel->r.width = T4KA3_NATIVE_WIDTH;
+ sel->r.height = T4KA3_NATIVE_HEIGHT;
+ break;
+ case V4L2_SEL_TGT_CROP_DEFAULT:
+ sel->r = t4ka3_default_crop;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int t4ka3_set_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_selection *sel)
+{
+ struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+ struct v4l2_mbus_framefmt *format;
+ struct v4l2_rect *crop;
+ struct v4l2_rect rect;
+
+ if (sel->target != V4L2_SEL_TGT_CROP)
+ return -EINVAL;
+
+ /*
+ * Clamp the boundaries of the crop rectangle to the size of the sensor
+ * pixel array. Align to multiples of 2 to ensure Bayer pattern isn't
+ * disrupted.
+ */
+ rect.left = clamp_val(ALIGN(sel->r.left, 2),
+ T4KA3_NATIVE_START_LEFT, T4KA3_NATIVE_WIDTH);
+ rect.top = clamp_val(ALIGN(sel->r.top, 2),
+ T4KA3_NATIVE_START_TOP, T4KA3_NATIVE_HEIGHT);
+ rect.width = clamp_val(ALIGN(sel->r.width, 2),
+ T4KA3_MIN_CROP_WIDTH, T4KA3_NATIVE_WIDTH);
+ rect.height = clamp_val(ALIGN(sel->r.height, 2),
+ T4KA3_MIN_CROP_HEIGHT, T4KA3_NATIVE_HEIGHT);
+
+ /* Make sure the crop rectangle isn't outside the bounds of the array */
+ rect.width = min_t(unsigned int, rect.width,
+ T4KA3_NATIVE_WIDTH - rect.left);
+ rect.height = min_t(unsigned int, rect.height,
+ T4KA3_NATIVE_HEIGHT - rect.top);
+
+ crop = __t4ka3_get_pad_crop(sensor, state, sel->pad, sel->which);
+
+ mutex_lock(&sensor->lock);
+
+ *crop = rect;
+
+ if (rect.width != crop->width || rect.height != crop->height) {
+ /*
+ * Reset the output image size if the crop rectangle size has
+ * been modified.
+ */
+ format = __t4ka3_get_pad_format(sensor, state, sel->pad,
+ sel->which);
+ format->width = rect.width;
+ format->height = rect.height;
+ if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE)
+ t4ka3_calc_mode(sensor);
+ }
+
+ mutex_unlock(&sensor->lock);
+
+ sel->r = rect;
+
+ return 0;
+}
+
+static int
+t4ka3_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->index)
+ return -EINVAL;
+
+ code->code = MEDIA_BUS_FMT_SGRBG10_1X10;
+ return 0;
+}
+
+static int t4ka3_enum_frame_size(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+ struct v4l2_rect *crop;
+
+ if (fse->index >= T4KA3_FRAME_SIZES)
+ return -EINVAL;
+
+ crop = __t4ka3_get_pad_crop(sensor, sd_state, fse->pad, fse->which);
+ if (!crop)
+ return -EINVAL;
+
+ fse->min_width = crop->width / (fse->index + 1);
+ fse->min_height = crop->height / (fse->index + 1);
+ fse->max_width = fse->min_width;
+ fse->max_height = fse->min_height;
+
+ return 0;
+}
+
+static int
+t4ka3_get_pad_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_format *fmt)
+{
+ struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+ struct v4l2_mbus_framefmt *format =
+ __t4ka3_get_pad_format(sensor, sd_state, fmt->pad, fmt->which);
+
+ fmt->format = *format;
+ return 0;
+}
+
+static int t4ka3_check_hwcfg(struct t4ka3_data *sensor)
+{
+ struct fwnode_handle *fwnode = dev_fwnode(sensor->dev);
+ struct v4l2_fwnode_endpoint bus_cfg = {
+ .bus_type = V4L2_MBUS_CSI2_DPHY,
+ };
+ struct fwnode_handle *endpoint;
+ unsigned int i;
+ int ret;
+
+ /*
+ * Sometimes the fwnode graph is initialized by the bridge driver.
+ * Bridge drivers doing this may also add GPIO mappings, wait for this.
+ */
+ endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL);
+ if (!endpoint)
+ return dev_err_probe(sensor->dev, -EPROBE_DEFER,
+ "waiting for fwnode graph endpoint\n");
+
+ ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg);
+ fwnode_handle_put(endpoint);
+ if (ret)
+ return ret;
+
+ if (bus_cfg.bus.mipi_csi2.num_data_lanes != 4) {
+ dev_err(sensor->dev, "only a 4-lane CSI2 config is supported");
+ ret = -EINVAL;
+ goto out_free_bus_cfg;
+ }
+
+ if (!bus_cfg.nr_of_link_frequencies) {
+ dev_err(sensor->dev, "no link frequencies defined\n");
+ ret = -EINVAL;
+ goto out_free_bus_cfg;
+ }
+
+ for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++) {
+ if (bus_cfg.link_frequencies[i] == T4KA3_LINK_FREQ)
+ break;
+ }
+
+ if (i == bus_cfg.nr_of_link_frequencies) {
+ dev_err(sensor->dev, "supported link freq %llu not found\n",
+ T4KA3_LINK_FREQ);
+ ret = -EINVAL;
+ goto out_free_bus_cfg;
+ }
+
+out_free_bus_cfg:
+ v4l2_fwnode_endpoint_free(&bus_cfg);
+
+ return ret;
+}
+
+static int t4ka3_init_state(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state)
+{
+ struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+
+ *v4l2_subdev_state_get_crop(sd_state, 0) = t4ka3_default_crop;
+
+ t4ka3_fill_format(sensor, v4l2_subdev_state_get_format(sd_state, 0),
+ T4KA3_ACTIVE_WIDTH, T4KA3_ACTIVE_HEIGHT);
+ return 0;
+}
+
+static const struct v4l2_ctrl_ops t4ka3_ctrl_ops = {
+ .s_ctrl = t4ka3_s_ctrl,
+};
+
+static const struct v4l2_subdev_video_ops t4ka3_video_ops = {
+ .s_stream = t4ka3_s_stream,
+};
+
+static const struct v4l2_subdev_pad_ops t4ka3_pad_ops = {
+ .enum_mbus_code = t4ka3_enum_mbus_code,
+ .enum_frame_size = t4ka3_enum_frame_size,
+ .get_fmt = t4ka3_get_pad_format,
+ .set_fmt = t4ka3_set_pad_format,
+ .get_selection = t4ka3_get_selection,
+ .set_selection = t4ka3_set_selection,
+};
+
+static const struct v4l2_subdev_ops t4ka3_ops = {
+ .video = &t4ka3_video_ops,
+ .pad = &t4ka3_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops t4ka3_internal_ops = {
+ .init_state = t4ka3_init_state,
+};
+
+static void t4ka3_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+
+ v4l2_async_unregister_subdev(&sensor->sd);
+ media_entity_cleanup(&sensor->sd.entity);
+ v4l2_ctrl_handler_free(&sensor->ctrls.handler);
+ pm_runtime_disable(&client->dev);
+}
+
+static int t4ka3_init_controls(struct t4ka3_data *sensor)
+{
+ const struct v4l2_ctrl_ops *ops = &t4ka3_ctrl_ops;
+ struct t4ka3_ctrls *ctrls = &sensor->ctrls;
+ struct v4l2_ctrl_handler *hdl = &ctrls->handler;
+ int min, max, def;
+ static const char * const test_pattern_menu[] = {
+ "Disabled",
+ "Solid White",
+ "Color Bars",
+ "Gradient",
+ "Random Data",
+ };
+
+ v4l2_ctrl_handler_init(hdl, 4);
+
+ hdl->lock = &sensor->lock;
+
+ ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
+ ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
+
+ ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl, ops,
+ V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(test_pattern_menu) - 1,
+ 0, 0, test_pattern_menu);
+ ctrls->link_freq = v4l2_ctrl_new_int_menu(hdl, NULL, V4L2_CID_LINK_FREQ,
+ 0, 0, sensor->link_freq);
+
+ t4ka3_get_vblank_limits(sensor, &min, &max, &def);
+ ctrls->vblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VBLANK, min, max, 1, def);
+
+ def = T4KA3_PIXELS_PER_LINE - sensor->mode.fmt.width;
+ ctrls->hblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HBLANK,
+ def, def, 1, def);
+
+ max = T4KA3_LINES_PER_FRAME_30FPS - T4KA3_COARSE_INTEGRATION_TIME_MARGIN;
+ ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
+ 0, max, 1, max);
+
+ ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_ANALOGUE_GAIN,
+ T4KA3_MIN_GLOBAL_GAIN_SUPPORTED,
+ T4KA3_MAX_GLOBAL_GAIN_SUPPORTED,
+ 1, T4KA3_MIN_GLOBAL_GAIN_SUPPORTED);
+
+ if (hdl->error)
+ return hdl->error;
+
+ ctrls->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
+ ctrls->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
+ ctrls->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+ ctrls->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+ sensor->sd.ctrl_handler = hdl;
+ return 0;
+}
+
+static int t4ka3_pm_suspend(struct device *dev)
+{
+ struct t4ka3_data *sensor = dev_get_drvdata(dev);
+
+ gpiod_set_value_cansleep(sensor->powerdown_gpio, 1);
+ gpiod_set_value_cansleep(sensor->reset_gpio, 1);
+
+ return 0;
+}
+
+static int t4ka3_pm_resume(struct device *dev)
+{
+ struct t4ka3_data *sensor = dev_get_drvdata(dev);
+ u16 sensor_id;
+ int ret;
+
+ usleep_range(5000, 6000);
+
+ gpiod_set_value_cansleep(sensor->powerdown_gpio, 0);
+ gpiod_set_value_cansleep(sensor->reset_gpio, 0);
+
+ /* waiting for the sensor after powering up */
+ msleep(20);
+
+ ret = t4ka3_detect(sensor, &sensor_id);
+ if (ret) {
+ dev_err(sensor->dev, "sensor detect failed\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static DEFINE_RUNTIME_DEV_PM_OPS(t4ka3_pm_ops, t4ka3_pm_suspend, t4ka3_pm_resume, NULL);
+
+static int t4ka3_probe(struct i2c_client *client)
+{
+ struct t4ka3_data *sensor;
+ int ret;
+
+ /* allocate sensor device & init sub device */
+ sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL);
+ if (!sensor)
+ return -ENOMEM;
+
+ sensor->dev = &client->dev;
+
+ ret = t4ka3_check_hwcfg(sensor);
+ if (ret)
+ return ret;
+
+ mutex_init(&sensor->lock);
+
+ sensor->link_freq[0] = T4KA3_LINK_FREQ;
+ sensor->mode.crop = t4ka3_default_crop;
+ t4ka3_fill_format(sensor, &sensor->mode.fmt, T4KA3_ACTIVE_WIDTH, T4KA3_ACTIVE_HEIGHT);
+ t4ka3_calc_mode(sensor);
+
+ v4l2_i2c_subdev_init(&(sensor->sd), client, &t4ka3_ops);
+ sensor->sd.internal_ops = &t4ka3_internal_ops;
+
+ sensor->powerdown_gpio = devm_gpiod_get(&client->dev, "powerdown",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(sensor->powerdown_gpio))
+ return dev_err_probe(&client->dev, PTR_ERR(sensor->powerdown_gpio),
+ "getting powerdown GPIO\n");
+
+ sensor->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(sensor->reset_gpio))
+ return dev_err_probe(&client->dev, PTR_ERR(sensor->reset_gpio),
+ "getting reset GPIO\n");
+
+ sensor->regmap = devm_cci_regmap_init_i2c(client, 16);
+ if (IS_ERR(sensor->regmap))
+ return PTR_ERR(sensor->regmap);
+
+ pm_runtime_set_suspended(&client->dev);
+ pm_runtime_enable(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev, 1000);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ ret = t4ka3_s_config(&sensor->sd);
+ if (ret)
+ goto err_pm_runtime;
+
+ sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
+ sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+
+ ret = t4ka3_init_controls(sensor);
+ if (ret)
+ goto err_controls;
+
+ ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
+ if (ret)
+ goto err_controls;
+
+ ret = v4l2_async_register_subdev_sensor(&sensor->sd);
+ if (ret)
+ goto err_media_entity;
+
+ return 0;
+
+err_media_entity:
+ media_entity_cleanup(&sensor->sd.entity);
+err_controls:
+ v4l2_ctrl_handler_free(&sensor->ctrls.handler);
+err_pm_runtime:
+ pm_runtime_disable(&client->dev);
+ return ret;
+}
+
+static struct acpi_device_id t4ka3_acpi_match[] = {
+ { "XMCC0003" },
+ {}
+};
+MODULE_DEVICE_TABLE(acpi, t4ka3_acpi_match);
+
+static struct i2c_driver t4ka3_driver = {
+ .driver = {
+ .name = "t4ka3",
+ .acpi_match_table = ACPI_PTR(t4ka3_acpi_match),
+ .pm = pm_sleep_ptr(&t4ka3_pm_ops),
+ },
+ .probe = t4ka3_probe,
+ .remove = t4ka3_remove,
+};
+module_i2c_driver(t4ka3_driver)
+
+MODULE_DESCRIPTION("A low-level driver for T4KA3 sensor");
+MODULE_AUTHOR("HARVEY LV <harvey.lv@xxxxxxxxx>");
+MODULE_LICENSE("GPL");
--
2.46.2