// 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@kernel.org>
* Copyright (C) 2026 Kate Hsuan <hpa@redhat.com>
*/
#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/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(_bin) \
({ \
typeof(_bin) (b) = (_bin); \
((b) << 4) | (b); \
})
#define to_t4ka3_sensor(_sd) container_of_const(_sd, \
struct t4ka3_data, sd)
#define ctrl_to_t4ka3(_ctrl) container_of_const((_ctrl)->handler, \
struct t4ka3_data, \
ctrls.handler)
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 *gain;
struct v4l2_ctrl *test_pattern;
struct v4l2_ctrl *link_freq;
struct v4l2_ctrl *pixel_rate;
};
struct t4ka3_mode {
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;
int streaming;
/* MIPI lane info */
u32 link_freq_index;
u8 mipi_lanes;
};
/* 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 const s64 link_freq_menu_items[] = {
T4KA3_LINK_FREQ,
};
/* 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 void t4ka3_set_bayer_order(struct t4ka3_data *sensor,
struct v4l2_mbus_framefmt *fmt)
{
unsigned 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,
struct v4l2_mbus_framefmt *fmt)
{
int exp_max = 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 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_RAW;
t4ka3_set_bayer_order(sensor, fmt);
}
static void t4ka3_calc_mode(struct t4ka3_data *sensor,
struct v4l2_mbus_framefmt *fmt,
struct v4l2_rect *crop)
{
int width;
int height;
int binning;
width = fmt->width;
height = fmt->height;
if (width <= (crop->width / 2) && height <= (crop->height / 2))
binning = 2;
else
binning = 1;
width *= binning;
height *= binning;
sensor->mode.binning = binning;
sensor->mode.win_x = (crop->left + (crop->width - width) / 2) & ~1;
sensor->mode.win_y = (crop->top + (crop->height - height) / 2) & ~1;
/*
* t4ka3'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,
struct v4l2_subdev_state *state,
int *min, int *max, int *def)
{
struct v4l2_mbus_framefmt *fmt = v4l2_subdev_state_get_format(state, 0);
*min = T4KA3_MIN_VBLANK + (sensor->mode.binning - 1) * fmt->height;
*max = T4KA3_MAX_VBLANK - fmt->height;
*def = T4KA3_LINES_PER_FRAME_30FPS - 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 *fmt = &format->format;
struct v4l2_rect *crop =
v4l2_subdev_state_get_crop(sd_state, format->pad);
unsigned int width, height;
int min, max, def, ret = 0;
/* 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_ACTIVE && sensor->streaming)
return -EBUSY;
*v4l2_subdev_state_get_format(sd_state, 0) = format->format;
if (format->which == V4L2_SUBDEV_FORMAT_TRY)
return 0;
t4ka3_calc_mode(sensor, fmt, crop);
/* vblank range is height dependent adjust and reset to default */
t4ka3_get_vblank_limits(sensor, sd_state, &min, &max, &def);
ret = __v4l2_ctrl_modify_range(sensor->ctrls.vblank, min, max, 1, def);
if (ret)
return ret;
ret = __v4l2_ctrl_s_ctrl(sensor->ctrls.vblank, def);
if (ret)
return ret;
def = T4KA3_PIXELS_PER_LINE - fmt->width;
ret = __v4l2_ctrl_modify_range(sensor->ctrls.hblank, def, def, 1, def);
if (ret)
return ret;
return __v4l2_ctrl_s_ctrl(sensor->ctrls.hblank, def);
}
/* Horizontal or vertically flip the image */
static int t4ka3_update_flip(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *fmt,
int value, u8 flip_bit)
{
struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
int ret;
u64 val;
if (sensor->streaming)
return -EBUSY;
val = value ? flip_bit : 0;
ret = cci_update_bits(sensor->regmap, T4KA3_REG_IMG_ORIENTATION,
flip_bit, val, NULL);
if (ret)
return ret;
t4ka3_set_bayer_order(sensor, 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_ctrl(struct v4l2_ctrl *ctrl)
{
struct t4ka3_data *sensor = ctrl_to_t4ka3(ctrl);
struct v4l2_subdev_state *state =
v4l2_subdev_get_locked_active_state(&sensor->sd);
struct v4l2_mbus_framefmt *fmt =
v4l2_subdev_state_get_format(state, 0);
int ret;
/* Update exposure range on vblank changes */
if (ctrl->id == V4L2_CID_VBLANK) {
ret = t4ka3_update_exposure_range(sensor, fmt);
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))
return 0;
switch (ctrl->id) {
case V4L2_CID_TEST_PATTERN:
ret = t4ka3_test_pattern(sensor, ctrl->val);
break;
case V4L2_CID_VFLIP:
ret = t4ka3_update_flip(&sensor->sd, fmt,
ctrl->val, T4KA3_VFLIP_BIT);
break;
case V4L2_CID_HFLIP:
ret = t4ka3_update_flip(&sensor->sd, fmt,
ctrl->val, T4KA3_HFLIP_BIT);
break;
case V4L2_CID_VBLANK:
ret = cci_write(sensor->regmap, T4KA3_REG_FRAME_LENGTH_LINES,
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;
}
static int t4ka3_set_mode(struct t4ka3_data *sensor,
struct v4l2_subdev_state *state)
{
struct v4l2_mbus_framefmt *fmt = v4l2_subdev_state_get_format(state, 0);
int ret = 0;
cci_write(sensor->regmap, T4KA3_REG_HORZ_OUTPUT_SIZE, fmt->width, &ret);
/* Write mode-height - 2 otherwise things don't work, hw-bug ? */
cci_write(sensor->regmap, T4KA3_REG_VERT_OUTPUT_SIZE,
fmt->height - 2, &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, fmt->width, &ret);
cci_write(sensor->regmap, T4KA3_REG_WIN_HEIGHT, 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_enable_stream(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
u32 pad, u64 streams_mask)
{
struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
int ret;
ret = pm_runtime_get_sync(sensor->sd.dev);
if (ret < 0) {
dev_err(sensor->dev, "power-up err.\n");
goto error_powerdown;
}
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, state);
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;
return ret;
error_powerdown:
pm_runtime_put(sensor->sd.dev);
return ret;
}
static int t4ka3_disable_stream(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
u32 pad, u64 streams_mask)
{
struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
int ret;
ret = cci_write(sensor->regmap, T4KA3_REG_STREAM, 0, NULL);
pm_runtime_put(sensor->sd.dev);
sensor->streaming = 0;
if (ret)
dev_err(sensor->dev,
"failed to disable stream with return value: %d\n",
ret);
return 0;
}
static int t4ka3_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
struct v4l2_subdev_selection *sel)
{
switch (sel->target) {
case V4L2_SEL_TGT_CROP:
sel->r = *v4l2_subdev_state_get_crop(state, sel->pad);
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.left);
rect.height = clamp_val(ALIGN(sel->r.height, 2), T4KA3_MIN_CROP_HEIGHT,
T4KA3_NATIVE_HEIGHT - rect.top);
crop = v4l2_subdev_state_get_crop(state, sel->pad);
if (rect.width != crop->width || rect.height != crop->height) {
/*
* Reset the output image size if the crop rectangle size has
* been modified.
*/
format = v4l2_subdev_state_get_format(state, sel->pad);
format->width = rect.width;
format->height = rect.height;
if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE)
t4ka3_calc_mode(sensor, format, crop);
}
sel->r = *crop = 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 v4l2_rect *crop;
if (fse->index >= T4KA3_FRAME_SIZES)
return -EINVAL;
crop = v4l2_subdev_state_get_crop(sd_state, fse->pad);
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_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 long link_freq_bitmap;
int ret;
endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL);
ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg);
fwnode_handle_put(endpoint);
if (ret)
return ret;
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 < 0)
goto out_free_bus_cfg;
sensor->link_freq_index = ffs(link_freq_bitmap) - 1;
/* 4 MIPI lanes */
if (bus_cfg.bus.mipi_csi2.num_data_lanes != 4) {
ret = dev_err_probe(sensor->dev, -EINVAL,
"number of CSI2 data lanes %u is not supported\n",
bus_cfg.bus.mipi_csi2.num_data_lanes);
goto out_free_bus_cfg;
}
sensor->mipi_lanes = bus_cfg.bus.mipi_csi2.num_data_lanes;
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 = v4l2_subdev_s_stream_helper,
};
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 = v4l2_subdev_get_fmt,
.set_fmt = t4ka3_set_pad_format,
.get_selection = t4ka3_get_selection,
.set_selection = t4ka3_set_selection,
.enable_streams = t4ka3_enable_stream,
.disable_streams = t4ka3_disable_stream,
};
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 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_subdev_state *state;
struct v4l2_mbus_framefmt *fmt;
struct v4l2_rect *crop;
struct v4l2_ctrl_handler *hdl = &ctrls->handler;
struct v4l2_fwnode_device_properties props;
int ret, min, max, def;
static const char * const test_pattern_menu[] = {
"Disabled",
"Solid White",
"Color Bars",
"Gradient",
"Random Data",
};
v4l2_ctrl_handler_init(hdl, 11);
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, link_freq_menu_items);
ctrls->pixel_rate = v4l2_ctrl_new_std(hdl, NULL, V4L2_CID_PIXEL_RATE,
0, T4KA3_PIXEL_RATE,
1, T4KA3_PIXEL_RATE);
state = v4l2_subdev_lock_and_get_active_state(&sensor->sd);
fmt = v4l2_subdev_state_get_format(state, 0);
crop = v4l2_subdev_state_get_crop(state, 0);
t4ka3_calc_mode(sensor, fmt, crop);
t4ka3_get_vblank_limits(sensor, state, &min, &max, &def);
v4l2_subdev_unlock_state(state);
ctrls->vblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VBLANK,
min, max, 1, def);
def = T4KA3_PIXELS_PER_LINE - T4KA3_ACTIVE_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);
ret = v4l2_fwnode_device_parse(sensor->dev, &props);
if (ret)
return ret;
v4l2_ctrl_new_fwnode_properties(hdl, ops, &props);
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 */
fsleep(20000);
ret = t4ka3_detect(sensor, &sensor_id);
if (ret) {
dev_err(sensor->dev, "sensor detect failed\n");
gpiod_set_value_cansleep(sensor->powerdown_gpio, 1);
gpiod_set_value_cansleep(sensor->reset_gpio, 1);
return ret;
}
return 0;
}
static DEFINE_RUNTIME_DEV_PM_OPS(t4ka3_pm_ops, t4ka3_pm_suspend,
t4ka3_pm_resume, NULL);
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);
v4l2_ctrl_handler_free(&sensor->ctrls.handler);
v4l2_subdev_cleanup(sd);
media_entity_cleanup(&sensor->sd.entity);
/*
* Disable runtime PM. In case runtime PM is disabled in the kernel,
* make sure to turn power off manually.
*/
pm_runtime_disable(&client->dev);
if (!pm_runtime_status_suspended(&client->dev))
t4ka3_pm_suspend(&client->dev);
pm_runtime_set_suspended(&client->dev);
}
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);
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);
ret = t4ka3_pm_resume(sensor->dev);
if (ret)
return ret;
pm_runtime_set_active(&client->dev);
pm_runtime_enable(&client->dev);
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 = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
if (ret)
goto err_pm_disable;
sensor->sd.state_lock = sensor->ctrls.handler.lock;
ret = v4l2_subdev_init_finalize(&sensor->sd);
if (ret < 0) {
dev_err(&client->dev, "failed to init subdev: %d", ret);
goto err_media_entity;
}
ret = t4ka3_init_controls(sensor);
if (ret)
goto err_controls;
ret = v4l2_async_register_subdev_sensor(&sensor->sd);
if (ret)
goto err_controls;
pm_runtime_set_autosuspend_delay(&client->dev, 1000);
pm_runtime_idle(&client->dev);
return 0;
err_controls:
v4l2_ctrl_handler_free(&sensor->ctrls.handler);
v4l2_subdev_cleanup(&sensor->sd);
err_media_entity:
media_entity_cleanup(&sensor->sd.entity);
err_pm_disable:
pm_runtime_disable(&client->dev);
pm_runtime_put_noidle(&client->dev);
t4ka3_pm_suspend(&client->dev);
return ret;
}
static const 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@intel.com>");
MODULE_AUTHOR("Kate Hsuan <hpa@redhat.com>");
MODULE_LICENSE("GPL");
