1 // SPDX-License-Identifier: GPL-2.0-only
9  * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
20 #include <media/v4l2-device.h>
21 #include <media/v4l2-event.h>
22 #include <media/v4l2-ctrls.h>
23 #include <media/v4l2-fwnode.h>
24 #include <media/v4l2-mediabus.h>
25 #include <media/v4l2-image-sizes.h>
29 MODULE_DESCRIPTION("A low-level driver for OmniVision ov7670 sensors");
34 MODULE_PARM_DESC(debug, "Debug level (0-1)");
67 #define   CLK_EXT	  0x40	  /* Use external clock directly */
68 #define   CLK_SCALE	  0x3f	  /* Mask for internal clock scale */
76 #define	  COM7_RGB	  0x04	  /* bits 0 and 2 - RGB format */
87 #define REG_COM9	0x14	/* Control 9  - gain ceiling */
92 #define   COM10_VS_LEAD	  0x04	  /* VSYNC on clock leading edge */
113 #define   TSLB_YLAST	  0x04	  /* UYVY or VYUY - see com13 */
125 #define   COM13_UVSWAP	  0x01	  /* V before U - w/TSLB */
127 #define   COM14_DCWEN	  0x10	  /* DCW/PCLK-scale enable */
138 #define   COM17_AECWIN	  0xc0	  /* AEC window - must match COM4 */
145  * Order: v-red, v-green, v-blue, u-red, u-green, u-blue
147  * They are nine-bit signed quantities, with the sign bit
148  * stored in 0x58.  Sign for v-red is bit 0, and up from there.
160 #define REG_DBLV	0x6b	/* PLL control an debugging */
161 #define   DBLV_BYPASS	  0x0a	  /* Bypass PLL */
162 #define   DBLV_X4	  0x4a	  /* clock x4 */
163 #define   DBLV_X6	  0x8a	  /* clock x6 */
164 #define   DBLV_X8	  0xca	  /* clock x8 */
250 	int clock_speed;		/* External clock speed (MHz) */
251 	u8 clkrc;			/* Clock divider value */
265 	return &container_of(ctrl->handler, struct ov7670_info, hdl)->sd;  in to_sd()
272  * is really no making sense of most of these - lots of "reserved" values
286  * Clock scale: 3 = 15fps
290 	{ REG_CLKRC, 0x1 },	/* OV: clock scale (30 fps) */
295 	 * make sense - hstop is less than hstart.  But they work...
384 	/* Extra-weird stuff.  Some sort of multiplexor register */
471  * Low-level register I/O.
518 	msg.addr = client->addr;  in ov7670_read_i2c()
522 	ret = i2c_transfer(client->adapter, &msg, 1);  in ov7670_read_i2c()
531 	ret = i2c_transfer(client->adapter, &msg, 1);  in ov7670_read_i2c()
548 	msg.addr = client->addr;  in ov7670_write_i2c()
552 	ret = i2c_transfer(client->adapter, &msg, 1);  in ov7670_write_i2c()
565 	if (info->use_smbus)  in ov7670_read()
576 	if (info->use_smbus)  in ov7670_write()
600 	while (vals->reg_num != 0xff || vals->value != 0xff) {  in ov7670_write_array()
601 		int ret = ov7670_write(sd, vals->reg_num, vals->value);  in ov7670_write_array()
639 		return -ENODEV;  in ov7670_detect()
644 		return -ENODEV;  in ov7670_detect()
652 		return -ENODEV;  in ov7670_detect()
657 		return -ENODEV;  in ov7670_detect()
677 		.cmatrix	= { 128, -128, 0, -34, -94, 128 },
683 		.cmatrix	= { 179, -179, 0, -61, -176, 228 },
689 		.cmatrix	= { 179, -179, 0, -61, -176, 228 },
706  * QCIF mode is done (by OV) in a very strange way - it actually looks like
707  * VGA with weird scaling options - they do *not* use the canned QCIF mode
799 	u32 clkrc = info->clkrc;  in ov7675_get_framerate()
802 	if (info->pll_bypass)  in ov7675_get_framerate()
808 	if (info->fmt->mbus_code == MEDIA_BUS_FMT_SBGGR8_1X8)  in ov7675_get_framerate()
811 	tpf->numerator = 1;  in ov7675_get_framerate()
812 	tpf->denominator = (5 * pll_factor * info->clock_speed) /  in ov7675_get_framerate()
821 	ret = ov7670_write(sd, REG_CLKRC, info->clkrc);  in ov7675_apply_framerate()
826 			    info->pll_bypass ? DBLV_BYPASS : DBLV_X4);  in ov7675_apply_framerate()
843 	if (tpf->numerator == 0 || tpf->denominator == 0) {  in ov7675_set_framerate()
846 		pll_factor = info->pll_bypass ? 1 : PLL_FACTOR;  in ov7675_set_framerate()
847 		clkrc = (5 * pll_factor * info->clock_speed * tpf->numerator) /  in ov7675_set_framerate()
848 			(4 * tpf->denominator);  in ov7675_set_framerate()
849 		if (info->fmt->mbus_code == MEDIA_BUS_FMT_SBGGR8_1X8)  in ov7675_set_framerate()
851 		clkrc--;  in ov7675_set_framerate()
855 	 * The datasheet claims that clkrc = 0 will divide the input clock by 1  in ov7675_set_framerate()
863 	info->clkrc = clkrc;  in ov7675_set_framerate()
871 	 * the framerate will be restored right after power-up.  in ov7675_set_framerate()
873 	if (info->on)  in ov7675_set_framerate()
884 	tpf->numerator = 1;  in ov7670_get_framerate_legacy()
885 	tpf->denominator = info->clock_speed;  in ov7670_get_framerate_legacy()
886 	if ((info->clkrc & CLK_EXT) == 0 && (info->clkrc & CLK_SCALE) > 1)  in ov7670_get_framerate_legacy()
887 		tpf->denominator /= (info->clkrc & CLK_SCALE);  in ov7670_get_framerate_legacy()
896 	if (tpf->numerator == 0 || tpf->denominator == 0)  in ov7670_set_framerate_legacy()
899 		div = (tpf->numerator * info->clock_speed) / tpf->denominator;  in ov7670_set_framerate_legacy()
904 	info->clkrc = (info->clkrc & 0x80) | div;  in ov7670_set_framerate_legacy()
905 	tpf->numerator = 1;  in ov7670_set_framerate_legacy()
906 	tpf->denominator = info->clock_speed / div;  in ov7670_set_framerate_legacy()
911 	 * the framerate will be restored right after power-up.  in ov7670_set_framerate_legacy()
913 	if (info->on)  in ov7670_set_framerate_legacy()
914 		return ov7670_write(sd, REG_CLKRC, info->clkrc);  in ov7670_set_framerate_legacy()
966 	if (code->pad || code->index >= N_OV7670_FMTS)  in ov7670_enum_mbus_code()
967 		return -EINVAL;  in ov7670_enum_mbus_code()
969 	code->code = ov7670_formats[code->index].mbus_code;  in ov7670_enum_mbus_code()
981 	unsigned int n_win_sizes = info->devtype->n_win_sizes;  in ov7670_try_fmt_internal()
985 		if (ov7670_formats[index].mbus_code == fmt->code)  in ov7670_try_fmt_internal()
990 		fmt->code = ov7670_formats[0].mbus_code;  in ov7670_try_fmt_internal()
997 	fmt->field = V4L2_FIELD_NONE;  in ov7670_try_fmt_internal()
1003 	if (info->min_width || info->min_height)  in ov7670_try_fmt_internal()
1005 			wsize = info->devtype->win_sizes + i;  in ov7670_try_fmt_internal()
1007 			if (wsize->width < info->min_width ||  in ov7670_try_fmt_internal()
1008 				wsize->height < info->min_height) {  in ov7670_try_fmt_internal()
1017 	for (wsize = info->devtype->win_sizes;  in ov7670_try_fmt_internal()
1018 	     wsize < info->devtype->win_sizes + win_sizes_limit; wsize++)  in ov7670_try_fmt_internal()
1019 		if (fmt->width >= wsize->width && fmt->height >= wsize->height)  in ov7670_try_fmt_internal()
1021 	if (wsize >= info->devtype->win_sizes + win_sizes_limit)  in ov7670_try_fmt_internal()
1022 		wsize--;   /* Take the smallest one */  in ov7670_try_fmt_internal()
1028 	fmt->width = wsize->width;  in ov7670_try_fmt_internal()
1029 	fmt->height = wsize->height;  in ov7670_try_fmt_internal()
1030 	fmt->colorspace = ov7670_formats[index].colorspace;  in ov7670_try_fmt_internal()
1032 	info->format = *fmt;  in ov7670_try_fmt_internal()
1040 	struct ov7670_win_size *wsize = info->wsize;  in ov7670_apply_fmt()
1047 	 * to set it absolutely here, as long as the format-specific  in ov7670_apply_fmt()
1050 	com7 = info->fmt->regs[0].value;  in ov7670_apply_fmt()
1051 	com7 |= wsize->com7_bit;  in ov7670_apply_fmt()
1059 	if (info->mbus_config & V4L2_MBUS_VSYNC_ACTIVE_LOW)  in ov7670_apply_fmt()
1061 	if (info->mbus_config & V4L2_MBUS_HSYNC_ACTIVE_LOW)  in ov7670_apply_fmt()
1063 	if (info->pclk_hb_disable)  in ov7670_apply_fmt()
1072 	ret = ov7670_write_array(sd, info->fmt->regs + 1);  in ov7670_apply_fmt()
1076 	ret = ov7670_set_hw(sd, wsize->hstart, wsize->hstop, wsize->vstart,  in ov7670_apply_fmt()
1077 			    wsize->vstop);  in ov7670_apply_fmt()
1081 	if (wsize->regs) {  in ov7670_apply_fmt()
1082 		ret = ov7670_write_array(sd, wsize->regs);  in ov7670_apply_fmt()
1097 	ret = ov7670_write(sd, REG_CLKRC, info->clkrc);  in ov7670_apply_fmt()
1117 	if (format->pad)  in ov7670_set_fmt()
1118 		return -EINVAL;  in ov7670_set_fmt()
1120 	if (format->which == V4L2_SUBDEV_FORMAT_TRY) {  in ov7670_set_fmt()
1121 		ret = ov7670_try_fmt_internal(sd, &format->format, NULL, NULL);  in ov7670_set_fmt()
1126 						      format->pad);  in ov7670_set_fmt()
1127 		*mbus_fmt = format->format;  in ov7670_set_fmt()
1132 	ret = ov7670_try_fmt_internal(sd, &format->format, &info->fmt, &info->wsize);  in ov7670_set_fmt()
1139 	 * the frame format will be restored right after power-up.  in ov7670_set_fmt()
1141 	if (info->on)  in ov7670_set_fmt()
1156 	if (format->which == V4L2_SUBDEV_FORMAT_TRY) {  in ov7670_get_fmt()
1159 		format->format = *mbus_fmt;  in ov7670_get_fmt()
1162 		return -EINVAL;  in ov7670_get_fmt()
1165 		format->format = info->format;  in ov7670_get_fmt()
1181 	info->devtype->get_framerate(sd, &ival->interval);  in ov7670_g_frame_interval()
1189 	struct v4l2_fract *tpf = &ival->interval;  in ov7670_s_frame_interval()
1193 	return info->devtype->set_framerate(sd, tpf);  in ov7670_s_frame_interval()
1198  * Frame intervals.  Since frame rates are controlled with the clock
1210 	unsigned int n_win_sizes = info->devtype->n_win_sizes;  in ov7670_enum_frame_interval()
1213 	if (fie->pad)  in ov7670_enum_frame_interval()
1214 		return -EINVAL;  in ov7670_enum_frame_interval()
1215 	if (fie->index >= ARRAY_SIZE(ov7670_frame_rates))  in ov7670_enum_frame_interval()
1216 		return -EINVAL;  in ov7670_enum_frame_interval()
1225 		struct ov7670_win_size *win = &info->devtype->win_sizes[i];  in ov7670_enum_frame_interval()
1227 		if (info->min_width && win->width < info->min_width)  in ov7670_enum_frame_interval()
1229 		if (info->min_height && win->height < info->min_height)  in ov7670_enum_frame_interval()
1231 		if (fie->width == win->width && fie->height == win->height)  in ov7670_enum_frame_interval()
1235 		return -EINVAL;  in ov7670_enum_frame_interval()
1236 	fie->interval.numerator = 1;  in ov7670_enum_frame_interval()
1237 	fie->interval.denominator = ov7670_frame_rates[fie->index];  in ov7670_enum_frame_interval()
1250 	int num_valid = -1;  in ov7670_enum_frame_size()
1251 	__u32 index = fse->index;  in ov7670_enum_frame_size()
1252 	unsigned int n_win_sizes = info->devtype->n_win_sizes;  in ov7670_enum_frame_size()
1254 	if (fse->pad)  in ov7670_enum_frame_size()
1255 		return -EINVAL;  in ov7670_enum_frame_size()
1262 		struct ov7670_win_size *win = &info->devtype->win_sizes[i];  in ov7670_enum_frame_size()
1264 		if (info->min_width && win->width < info->min_width)  in ov7670_enum_frame_size()
1266 		if (info->min_height && win->height < info->min_height)  in ov7670_enum_frame_size()
1269 			fse->min_width = fse->max_width = win->width;  in ov7670_enum_frame_size()
1270 			fse->min_height = fse->max_height = win->height;  in ov7670_enum_frame_size()
1275 	return -EINVAL;  in ov7670_enum_frame_size()
1300 			if (matrix[i] < -255)  in ov7670_store_cmatrix()
1303 				raw = (-1 * matrix[i]) & 0xff;  in ov7670_store_cmatrix()
1321  * So here is a simple table of sine values, 0-90 degrees, in steps
1325  * carefully limited to -180 <= theta <= 180.
1341 		theta = -theta;  in ov7670_sine()
1342 		chs = -1;  in ov7670_sine()
1347 		theta -= 90;  in ov7670_sine()
1348 		sine = 1000 - ov7670_sin_table[theta/SIN_STEP];  in ov7670_sine()
1355 	theta = 90 - theta;  in ov7670_cosine()
1357 		theta -= 360;  in ov7670_cosine()
1358 	else if (theta < -180)  in ov7670_cosine()
1374 		matrix[i] = (info->fmt->cmatrix[i] * sat) >> 7;  in ov7670_calc_cmatrix()
1388 		matrix[3] = (matrix[3]*costh - matrix[0]*sinth)/1000;  in ov7670_calc_cmatrix()
1389 		matrix[4] = (matrix[4]*costh - matrix[1]*sinth)/1000;  in ov7670_calc_cmatrix()
1390 		matrix[5] = (matrix[5]*costh - matrix[2]*sinth)/1000;  in ov7670_calc_cmatrix()
1414 	return (128 - v) | 0x80;  in ov7670_abs_to_sm()
1563 	"8-bar color bar",
1585 	switch (ctrl->id) {  in ov7670_g_volatile_ctrl()
1587 		return ov7670_g_gain(sd, &info->gain->val);  in ov7670_g_volatile_ctrl()
1589 	return -EINVAL;  in ov7670_g_volatile_ctrl()
1597 	switch (ctrl->id) {  in ov7670_s_ctrl()
1599 		return ov7670_s_brightness(sd, ctrl->val);  in ov7670_s_ctrl()
1601 		return ov7670_s_contrast(sd, ctrl->val);  in ov7670_s_ctrl()
1604 				info->saturation->val, info->hue->val);  in ov7670_s_ctrl()
1606 		return ov7670_s_vflip(sd, ctrl->val);  in ov7670_s_ctrl()
1608 		return ov7670_s_hflip(sd, ctrl->val);  in ov7670_s_ctrl()
1612 		if (!ctrl->val) {  in ov7670_s_ctrl()
1614 			return ov7670_s_gain(sd, info->gain->val);  in ov7670_s_ctrl()
1616 		return ov7670_s_autogain(sd, ctrl->val);  in ov7670_s_ctrl()
1620 		if (ctrl->val == V4L2_EXPOSURE_MANUAL) {  in ov7670_s_ctrl()
1622 			return ov7670_s_exp(sd, info->exposure->val);  in ov7670_s_ctrl()
1624 		return ov7670_s_autoexp(sd, ctrl->val);  in ov7670_s_ctrl()
1626 		return ov7670_s_test_pattern(sd, ctrl->val);  in ov7670_s_ctrl()
1628 	return -EINVAL;  in ov7670_s_ctrl()
1642 	ret = ov7670_read(sd, reg->reg & 0xff, &val);  in ov7670_g_register()
1643 	reg->val = val;  in ov7670_g_register()
1644 	reg->size = 1;  in ov7670_g_register()
1650 	ov7670_write(sd, reg->reg & 0xff, reg->val & 0xff);  in ov7670_s_register()
1659 	if (info->on)  in ov7670_power_on()
1662 	clk_prepare_enable(info->clk);  in ov7670_power_on()
1664 	if (info->pwdn_gpio)  in ov7670_power_on()
1665 		gpiod_set_value(info->pwdn_gpio, 0);  in ov7670_power_on()
1666 	if (info->resetb_gpio) {  in ov7670_power_on()
1667 		gpiod_set_value(info->resetb_gpio, 1);  in ov7670_power_on()
1669 		gpiod_set_value(info->resetb_gpio, 0);  in ov7670_power_on()
1671 	if (info->pwdn_gpio || info->resetb_gpio || info->clk)  in ov7670_power_on()
1674 	info->on = true;  in ov7670_power_on()
1681 	if (!info->on)  in ov7670_power_off()
1684 	clk_disable_unprepare(info->clk);  in ov7670_power_off()
1686 	if (info->pwdn_gpio)  in ov7670_power_off()
1687 		gpiod_set_value(info->pwdn_gpio, 1);  in ov7670_power_off()
1689 	info->on = false;  in ov7670_power_off()
1696 	if (info->on == on)  in ov7670_s_power()
1704 		v4l2_ctrl_handler_setup(&info->hdl);  in ov7670_s_power()
1717 	format->width = info->devtype->win_sizes[0].width;  in ov7670_get_default_format()
1718 	format->height = info->devtype->win_sizes[0].height;  in ov7670_get_default_format()
1719 	format->colorspace = info->fmt->colorspace;  in ov7670_get_default_format()
1720 	format->code = info->fmt->mbus_code;  in ov7670_get_default_format()
1721 	format->field = V4L2_FIELD_NONE;  in ov7670_get_default_format()
1728 				v4l2_subdev_get_try_format(sd, fh->state, 0);  in ov7670_open()
1736 /* ----------------------------------------------------------------------- */
1776 /* ----------------------------------------------------------------------- */
1795 	info->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "powerdown",  in ov7670_init_gpio()
1797 	if (IS_ERR(info->pwdn_gpio)) {  in ov7670_init_gpio()
1798 		dev_info(&client->dev, "can't get %s GPIO\n", "powerdown");  in ov7670_init_gpio()
1799 		return PTR_ERR(info->pwdn_gpio);  in ov7670_init_gpio()
1802 	info->resetb_gpio = devm_gpiod_get_optional(&client->dev, "reset",  in ov7670_init_gpio()
1804 	if (IS_ERR(info->resetb_gpio)) {  in ov7670_init_gpio()
1805 		dev_info(&client->dev, "can't get %s GPIO\n", "reset");  in ov7670_init_gpio()
1806 		return PTR_ERR(info->resetb_gpio);  in ov7670_init_gpio()
1815  * ov7670_parse_dt() - Parse device tree to collect mbus configuration
1827 		return -EINVAL;  in ov7670_parse_dt()
1829 	info->pclk_hb_disable = false;  in ov7670_parse_dt()
1830 	if (fwnode_property_present(fwnode, "ov7670,pclk-hb-disable"))  in ov7670_parse_dt()
1831 		info->pclk_hb_disable = true;  in ov7670_parse_dt()
1835 		return -EINVAL;  in ov7670_parse_dt()
1846 	info->mbus_config = bus_cfg.bus.parallel.flags;  in ov7670_parse_dt()
1859 	info = devm_kzalloc(&client->dev, sizeof(*info), GFP_KERNEL);  in ov7670_probe()
1861 		return -ENOMEM;  in ov7670_probe()
1862 	sd = &info->sd;  in ov7670_probe()
1866 	sd->internal_ops = &ov7670_subdev_internal_ops;  in ov7670_probe()
1867 	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;  in ov7670_probe()
1870 	info->clock_speed = 30; /* default: a guess */  in ov7670_probe()
1872 	if (dev_fwnode(&client->dev)) {  in ov7670_probe()
1873 		ret = ov7670_parse_dt(&client->dev, info);  in ov7670_probe()
1877 	} else if (client->dev.platform_data) {  in ov7670_probe()
1878 		struct ov7670_config *config = client->dev.platform_data;  in ov7670_probe()
1884 		info->min_width = config->min_width;  in ov7670_probe()
1885 		info->min_height = config->min_height;  in ov7670_probe()
1886 		info->use_smbus = config->use_smbus;  in ov7670_probe()
1888 		if (config->clock_speed)  in ov7670_probe()
1889 			info->clock_speed = config->clock_speed;  in ov7670_probe()
1891 		if (config->pll_bypass)  in ov7670_probe()
1892 			info->pll_bypass = true;  in ov7670_probe()
1894 		if (config->pclk_hb_disable)  in ov7670_probe()
1895 			info->pclk_hb_disable = true;  in ov7670_probe()
1898 	info->clk = devm_clk_get(&client->dev, "xclk"); /* optional */  in ov7670_probe()
1899 	if (IS_ERR(info->clk)) {  in ov7670_probe()
1900 		ret = PTR_ERR(info->clk);  in ov7670_probe()
1901 		if (ret == -ENOENT)  in ov7670_probe()
1902 			info->clk = NULL;  in ov7670_probe()
1913 	if (info->clk) {  in ov7670_probe()
1914 		info->clock_speed = clk_get_rate(info->clk) / 1000000;  in ov7670_probe()
1915 		if (info->clock_speed < 10 || info->clock_speed > 48) {  in ov7670_probe()
1916 			ret = -EINVAL;  in ov7670_probe()
1926 			client->addr << 1, client->adapter->name);  in ov7670_probe()
1930 			client->addr << 1, client->adapter->name);  in ov7670_probe()
1932 	info->devtype = &ov7670_devdata[id->driver_data];  in ov7670_probe()
1933 	info->fmt = &ov7670_formats[0];  in ov7670_probe()
1934 	info->wsize = &info->devtype->win_sizes[0];  in ov7670_probe()
1936 	ov7670_get_default_format(sd, &info->format);  in ov7670_probe()
1938 	info->clkrc = 0;  in ov7670_probe()
1943 	info->devtype->set_framerate(sd, &tpf);  in ov7670_probe()
1945 	v4l2_ctrl_handler_init(&info->hdl, 10);  in ov7670_probe()
1946 	v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,  in ov7670_probe()
1948 	v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,  in ov7670_probe()
1950 	v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,  in ov7670_probe()
1952 	v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,  in ov7670_probe()
1954 	info->saturation = v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,  in ov7670_probe()
1956 	info->hue = v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,  in ov7670_probe()
1957 			V4L2_CID_HUE, -180, 180, 5, 0);  in ov7670_probe()
1958 	info->gain = v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,  in ov7670_probe()
1960 	info->auto_gain = v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,  in ov7670_probe()
1962 	info->exposure = v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,  in ov7670_probe()
1964 	info->auto_exposure = v4l2_ctrl_new_std_menu(&info->hdl, &ov7670_ctrl_ops,  in ov7670_probe()
1967 	v4l2_ctrl_new_std_menu_items(&info->hdl, &ov7670_ctrl_ops,  in ov7670_probe()
1969 			ARRAY_SIZE(ov7670_test_pattern_menu) - 1, 0, 0,  in ov7670_probe()
1971 	sd->ctrl_handler = &info->hdl;  in ov7670_probe()
1972 	if (info->hdl.error) {  in ov7670_probe()
1973 		ret = info->hdl.error;  in ov7670_probe()
1981 	v4l2_ctrl_auto_cluster(2, &info->auto_gain, 0, true);  in ov7670_probe()
1982 	v4l2_ctrl_auto_cluster(2, &info->auto_exposure,  in ov7670_probe()
1984 	v4l2_ctrl_cluster(2, &info->saturation);  in ov7670_probe()
1987 	info->pad.flags = MEDIA_PAD_FL_SOURCE;  in ov7670_probe()
1988 	info->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;  in ov7670_probe()
1989 	ret = media_entity_pads_init(&info->sd.entity, 1, &info->pad);  in ov7670_probe()
1994 	v4l2_ctrl_handler_setup(&info->hdl);  in ov7670_probe()
1996 	ret = v4l2_async_register_subdev(&info->sd);  in ov7670_probe()
2004 	media_entity_cleanup(&info->sd.entity);  in ov7670_probe()
2006 	v4l2_ctrl_handler_free(&info->hdl);  in ov7670_probe()
2018 	v4l2_ctrl_handler_free(&info->hdl);  in ov7670_remove()
2019 	media_entity_cleanup(&info->sd.entity);  in ov7670_remove()