[media] media: ov5642: Add support for arbitrary resolution (171f1a48) · Commits · e / devices / android_kernel_oneplus_sm8150

drivers/media/video/ov5642.c

+167 −73

Original line number	Original line	Diff line number	Diff line
	@@ -14,8 +14,10 @@
	* published by the Free Software Foundation.		* published by the Free Software Foundation.
	*/		*/

			#include <linux/bitops.h>
	#include <linux/delay.h>		#include <linux/delay.h>
	#include <linux/i2c.h>		#include <linux/i2c.h>
			#include <linux/kernel.h>
	#include <linux/slab.h>		#include <linux/slab.h>
	#include <linux/videodev2.h>		#include <linux/videodev2.h>
	#include <linux/module.h>		#include <linux/module.h>
	@@ -45,19 +47,44 @@
	#define REG_OUT_TOTAL_WIDTH_LOW 0x380d		#define REG_OUT_TOTAL_WIDTH_LOW 0x380d
	#define REG_OUT_TOTAL_HEIGHT_HIGH 0x380e		#define REG_OUT_TOTAL_HEIGHT_HIGH 0x380e
	#define REG_OUT_TOTAL_HEIGHT_LOW 0x380f		#define REG_OUT_TOTAL_HEIGHT_LOW 0x380f
			#define REG_OUTPUT_FORMAT 0x4300
			#define REG_ISP_CTRL_01 0x5001
			#define REG_AVG_WINDOW_END_X_HIGH 0x5682
			#define REG_AVG_WINDOW_END_X_LOW 0x5683
			#define REG_AVG_WINDOW_END_Y_HIGH 0x5686
			#define REG_AVG_WINDOW_END_Y_LOW 0x5687

			/* active pixel array size */
			#define OV5642_SENSOR_SIZE_X 2592
			#define OV5642_SENSOR_SIZE_Y 1944

	/*		/*
	* define standard resolution.		* About OV5642 resolution, cropping and binning:
	* Works currently only for up to 720 lines		* This sensor supports it all, at least in the feature description.
	* eg. 320x240, 640x480, 800x600, 1280x720, 2048x720		* Unfortunately, no combination of appropriate registers settings could make
			* the chip work the intended way. As it works with predefined register lists,
			* some undocumented registers are presumably changed there to achieve their
			* goals.
			* This driver currently only works for resolutions up to 720 lines with a
			* 1:1 scale. Hopefully these restrictions will be removed in the future.
	*/		*/
			#define OV5642_MAX_WIDTH OV5642_SENSOR_SIZE_X
			#define OV5642_MAX_HEIGHT 720

	#define OV5642_WIDTH 1280		/* default sizes */
	#define OV5642_HEIGHT 720		#define OV5642_DEFAULT_WIDTH 1280
	#define OV5642_TOTAL_WIDTH 3200		#define OV5642_DEFAULT_HEIGHT OV5642_MAX_HEIGHT
	#define OV5642_TOTAL_HEIGHT 2000
	#define OV5642_SENSOR_SIZE_X 2592		/* minimum extra blanking */
	#define OV5642_SENSOR_SIZE_Y 1944		#define BLANKING_EXTRA_WIDTH 500
			#define BLANKING_EXTRA_HEIGHT 20

			/*
			* the sensor's autoexposure is buggy when setting total_height low.
			* It tries to expose longer than 1 frame period without taking care of it
			* and this leads to weird output. So we set 1000 lines as minimum.
			*/
			#define BLANKING_MIN_HEIGHT 1000

	struct regval_list {		struct regval_list {
	u16 reg_num;		u16 reg_num;
	@@ -582,6 +609,11 @@ struct ov5642_datafmt {
	struct ov5642 {		struct ov5642 {
	struct v4l2_subdev subdev;		struct v4l2_subdev subdev;
	const struct ov5642_datafmt *fmt;		const struct ov5642_datafmt *fmt;
			struct v4l2_rect crop_rect;

			/* blanking information */
			int total_width;
			int total_height;
	};		};

	static const struct ov5642_datafmt ov5642_colour_fmts[] = {		static const struct ov5642_datafmt ov5642_colour_fmts[] = {
	@@ -642,6 +674,21 @@ static int reg_write(struct i2c_client *client, u16 reg, u8 val)

	return 0;		return 0;
	}		}

			/*
			* convenience function to write 16 bit register values that are split up
			* into two consecutive high and low parts
			*/
			static int reg_write16(struct i2c_client *client, u16 reg, u16 val16)
			{
			int ret;

			ret = reg_write(client, reg, val16 >> 8);
			if (ret)
			return ret;
			return reg_write(client, reg + 1, val16 & 0x00ff);
			}

	#ifdef CONFIG_VIDEO_ADV_DEBUG		#ifdef CONFIG_VIDEO_ADV_DEBUG
	static int ov5642_get_register(struct v4l2_subdev sd, struct v4l2_dbg_register reg)		static int ov5642_get_register(struct v4l2_subdev sd, struct v4l2_dbg_register reg)
	{		{
	@@ -685,58 +732,55 @@ static int ov5642_write_array(struct i2c_client *client,
	return 0;		return 0;
	}		}

	static int ov5642_set_resolution(struct i2c_client *client)		static int ov5642_set_resolution(struct v4l2_subdev *sd)
	{		{
			struct i2c_client *client = v4l2_get_subdevdata(sd);
			struct ov5642 *priv = to_ov5642(client);
			int width = priv->crop_rect.width;
			int height = priv->crop_rect.height;
			int total_width = priv->total_width;
			int total_height = priv->total_height;
			int start_x = (OV5642_SENSOR_SIZE_X - width) / 2;
			int start_y = (OV5642_SENSOR_SIZE_Y - height) / 2;
	int ret;		int ret;
	u8 start_x_high = ((OV5642_SENSOR_SIZE_X - OV5642_WIDTH) / 2) >> 8;
	u8 start_x_low = ((OV5642_SENSOR_SIZE_X - OV5642_WIDTH) / 2) & 0xff;
	u8 start_y_high = ((OV5642_SENSOR_SIZE_Y - OV5642_HEIGHT) / 2) >> 8;
	u8 start_y_low = ((OV5642_SENSOR_SIZE_Y - OV5642_HEIGHT) / 2) & 0xff;

	u8 width_high = OV5642_WIDTH >> 8;
	u8 width_low = OV5642_WIDTH & 0xff;
	u8 height_high = OV5642_HEIGHT >> 8;
	u8 height_low = OV5642_HEIGHT & 0xff;

	u8 total_width_high = OV5642_TOTAL_WIDTH >> 8;
	u8 total_width_low = OV5642_TOTAL_WIDTH & 0xff;
	u8 total_height_high = OV5642_TOTAL_HEIGHT >> 8;
	u8 total_height_low = OV5642_TOTAL_HEIGHT & 0xff;

	ret = reg_write(client, REG_WINDOW_START_X_HIGH, start_x_high);
	if (!ret)
	ret = reg_write(client, REG_WINDOW_START_X_LOW, start_x_low);
	if (!ret)
	ret = reg_write(client, REG_WINDOW_START_Y_HIGH, start_y_high);
	if (!ret)
	ret = reg_write(client, REG_WINDOW_START_Y_LOW, start_y_low);

			/*
			* This should set the starting point for cropping.
			* Doesn't work so far.
			*/
			ret = reg_write16(client, REG_WINDOW_START_X_HIGH, start_x);
	if (!ret)		if (!ret)
	ret = reg_write(client, REG_WINDOW_WIDTH_HIGH, width_high);		ret = reg_write16(client, REG_WINDOW_START_Y_HIGH, start_y);
	if (!ret)		if (!ret) {
	ret = reg_write(client, REG_WINDOW_WIDTH_LOW , width_low);		priv->crop_rect.left = start_x;
	if (!ret)		priv->crop_rect.top = start_y;
	ret = reg_write(client, REG_WINDOW_HEIGHT_HIGH, height_high);		}
	if (!ret)
	ret = reg_write(client, REG_WINDOW_HEIGHT_LOW, height_low);

	if (!ret)		if (!ret)
	ret = reg_write(client, REG_OUT_WIDTH_HIGH, width_high);		ret = reg_write16(client, REG_WINDOW_WIDTH_HIGH, width);
	if (!ret)		if (!ret)
	ret = reg_write(client, REG_OUT_WIDTH_LOW , width_low);		ret = reg_write16(client, REG_WINDOW_HEIGHT_HIGH, height);
	if (!ret)		if (ret)
	ret = reg_write(client, REG_OUT_HEIGHT_HIGH, height_high);		return ret;
			priv->crop_rect.width = width;
			priv->crop_rect.height = height;

			/* Set the output window size. Only 1:1 scale is supported so far. */
			ret = reg_write16(client, REG_OUT_WIDTH_HIGH, width);
	if (!ret)		if (!ret)
	ret = reg_write(client, REG_OUT_HEIGHT_LOW, height_low);		ret = reg_write16(client, REG_OUT_HEIGHT_HIGH, height);

			/* Total width = output size + blanking */
	if (!ret)		if (!ret)
	ret = reg_write(client, REG_OUT_TOTAL_WIDTH_HIGH, total_width_high);		ret = reg_write16(client, REG_OUT_TOTAL_WIDTH_HIGH, total_width);
	if (!ret)		if (!ret)
	ret = reg_write(client, REG_OUT_TOTAL_WIDTH_LOW, total_width_low);		ret = reg_write16(client, REG_OUT_TOTAL_HEIGHT_HIGH, total_height);

			/* Sets the window for AWB calculations */
	if (!ret)		if (!ret)
	ret = reg_write(client, REG_OUT_TOTAL_HEIGHT_HIGH, total_height_high);		ret = reg_write16(client, REG_AVG_WINDOW_END_X_HIGH, width);
	if (!ret)		if (!ret)
	ret = reg_write(client, REG_OUT_TOTAL_HEIGHT_LOW, total_height_low);		ret = reg_write16(client, REG_AVG_WINDOW_END_Y_HIGH, height);

	return ret;		return ret;
	}		}
	@@ -744,18 +788,18 @@ static int ov5642_set_resolution(struct i2c_client *client)
	static int ov5642_try_fmt(struct v4l2_subdev *sd,		static int ov5642_try_fmt(struct v4l2_subdev *sd,
	struct v4l2_mbus_framefmt *mf)		struct v4l2_mbus_framefmt *mf)
	{		{
			struct i2c_client *client = v4l2_get_subdevdata(sd);
			struct ov5642 *priv = to_ov5642(client);
	const struct ov5642_datafmt *fmt = ov5642_find_datafmt(mf->code);		const struct ov5642_datafmt *fmt = ov5642_find_datafmt(mf->code);

	dev_dbg(sd->v4l2_dev->dev, "%s(%u) width: %u heigth: %u\n",		mf->width = priv->crop_rect.width;
	__func__, mf->code, mf->width, mf->height);		mf->height = priv->crop_rect.height;

	if (!fmt) {		if (!fmt) {
	mf->code = ov5642_colour_fmts[0].code;		mf->code = ov5642_colour_fmts[0].code;
	mf->colorspace = ov5642_colour_fmts[0].colorspace;		mf->colorspace = ov5642_colour_fmts[0].colorspace;
	}		}

	mf->width = OV5642_WIDTH;
	mf->height = OV5642_HEIGHT;
	mf->field = V4L2_FIELD_NONE;		mf->field = V4L2_FIELD_NONE;

	return 0;		return 0;
	@@ -767,20 +811,13 @@ static int ov5642_s_fmt(struct v4l2_subdev *sd,
	struct i2c_client *client = v4l2_get_subdevdata(sd);		struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct ov5642 *priv = to_ov5642(client);		struct ov5642 *priv = to_ov5642(client);

	dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);

	/* MIPI CSI could have changed the format, double-check */		/* MIPI CSI could have changed the format, double-check */
	if (!ov5642_find_datafmt(mf->code))		if (!ov5642_find_datafmt(mf->code))
	return -EINVAL;		return -EINVAL;

	ov5642_try_fmt(sd, mf);		ov5642_try_fmt(sd, mf);

	priv->fmt = ov5642_find_datafmt(mf->code);		priv->fmt = ov5642_find_datafmt(mf->code);

	ov5642_write_array(client, ov5642_default_regs_init);
	ov5642_set_resolution(client);
	ov5642_write_array(client, ov5642_default_regs_finalise);

	return 0;		return 0;
	}		}

	@@ -794,8 +831,8 @@ static int ov5642_g_fmt(struct v4l2_subdev *sd,

	mf->code = fmt->code;		mf->code = fmt->code;
	mf->colorspace = fmt->colorspace;		mf->colorspace = fmt->colorspace;
	mf->width = OV5642_WIDTH;		mf->width = priv->crop_rect.width;
	mf->height = OV5642_HEIGHT;		mf->height = priv->crop_rect.height;
	mf->field = V4L2_FIELD_NONE;		mf->field = V4L2_FIELD_NONE;

	return 0;		return 0;
	@@ -828,15 +865,44 @@ static int ov5642_g_chip_ident(struct v4l2_subdev *sd,
	return 0;		return 0;
	}		}

			static int ov5642_s_crop(struct v4l2_subdev sd, struct v4l2_crop a)
			{
			struct i2c_client *client = v4l2_get_subdevdata(sd);
			struct ov5642 *priv = to_ov5642(client);
			struct v4l2_rect *rect = &a->c;
			int ret;

			v4l_bound_align_image(&rect->width, 48, OV5642_MAX_WIDTH, 1,
			&rect->height, 32, OV5642_MAX_HEIGHT, 1, 0);

			priv->crop_rect.width = rect->width;
			priv->crop_rect.height = rect->height;
			priv->total_width = rect->width + BLANKING_EXTRA_WIDTH;
			priv->total_height = max_t(int, rect->height +
			BLANKING_EXTRA_HEIGHT,
			BLANKING_MIN_HEIGHT);
			priv->crop_rect.width = rect->width;
			priv->crop_rect.height = rect->height;

			ret = ov5642_write_array(client, ov5642_default_regs_init);
			if (!ret)
			ret = ov5642_set_resolution(sd);
			if (!ret)
			ret = ov5642_write_array(client, ov5642_default_regs_finalise);

			return ret;
			}

	static int ov5642_g_crop(struct v4l2_subdev sd, struct v4l2_crop a)		static int ov5642_g_crop(struct v4l2_subdev sd, struct v4l2_crop a)
	{		{
			struct i2c_client *client = v4l2_get_subdevdata(sd);
			struct ov5642 *priv = to_ov5642(client);
	struct v4l2_rect *rect = &a->c;		struct v4l2_rect *rect = &a->c;

	a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;		if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
	rect->top = 0;		return -EINVAL;
	rect->left = 0;
	rect->width = OV5642_WIDTH;		*rect = priv->crop_rect;
	rect->height = OV5642_HEIGHT;

	return 0;		return 0;
	}		}
	@@ -845,8 +911,8 @@ static int ov5642_cropcap(struct v4l2_subdev sd, struct v4l2_cropcap a)
	{		{
	a->bounds.left = 0;		a->bounds.left = 0;
	a->bounds.top = 0;		a->bounds.top = 0;
	a->bounds.width = OV5642_WIDTH;		a->bounds.width = OV5642_MAX_WIDTH;
	a->bounds.height = OV5642_HEIGHT;		a->bounds.height = OV5642_MAX_HEIGHT;
	a->defrect = a->bounds;		a->defrect = a->bounds;
	a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;		a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	a->pixelaspect.numerator = 1;		a->pixelaspect.numerator = 1;
	@@ -859,24 +925,43 @@ static int ov5642_g_mbus_config(struct v4l2_subdev *sd,
	struct v4l2_mbus_config *cfg)		struct v4l2_mbus_config *cfg)
	{		{
	cfg->type = V4L2_MBUS_CSI2;		cfg->type = V4L2_MBUS_CSI2;
	cfg->flags = V4L2_MBUS_CSI2_2_LANE \|		cfg->flags = V4L2_MBUS_CSI2_2_LANE \| V4L2_MBUS_CSI2_CHANNEL_0 \|
	V4L2_MBUS_CSI2_CHANNEL_0 \|
	V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;		V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;

	return 0;		return 0;
	}		}

			static int ov5642_s_power(struct v4l2_subdev *sd, int on)
			{
			struct i2c_client *client;
			int ret;

			if (!on)
			return 0;

			client = v4l2_get_subdevdata(sd);
			ret = ov5642_write_array(client, ov5642_default_regs_init);
			if (!ret)
			ret = ov5642_set_resolution(sd);
			if (!ret)
			ret = ov5642_write_array(client, ov5642_default_regs_finalise);

			return ret;
			}

	static struct v4l2_subdev_video_ops ov5642_subdev_video_ops = {		static struct v4l2_subdev_video_ops ov5642_subdev_video_ops = {
	.s_mbus_fmt = ov5642_s_fmt,		.s_mbus_fmt = ov5642_s_fmt,
	.g_mbus_fmt = ov5642_g_fmt,		.g_mbus_fmt = ov5642_g_fmt,
	.try_mbus_fmt = ov5642_try_fmt,		.try_mbus_fmt = ov5642_try_fmt,
	.enum_mbus_fmt = ov5642_enum_fmt,		.enum_mbus_fmt = ov5642_enum_fmt,
			.s_crop = ov5642_s_crop,
	.g_crop = ov5642_g_crop,		.g_crop = ov5642_g_crop,
	.cropcap = ov5642_cropcap,		.cropcap = ov5642_cropcap,
	.g_mbus_config = ov5642_g_mbus_config,		.g_mbus_config = ov5642_g_mbus_config,
	};		};

	static struct v4l2_subdev_core_ops ov5642_subdev_core_ops = {		static struct v4l2_subdev_core_ops ov5642_subdev_core_ops = {
			.s_power = ov5642_s_power,
	.g_chip_ident = ov5642_g_chip_ident,		.g_chip_ident = ov5642_g_chip_ident,
	#ifdef CONFIG_VIDEO_ADV_DEBUG		#ifdef CONFIG_VIDEO_ADV_DEBUG
	.g_register = ov5642_get_register,		.g_register = ov5642_get_register,
	@@ -936,6 +1021,15 @@ static int ov5642_probe(struct i2c_client *client,

	priv->fmt = &ov5642_colour_fmts[0];		priv->fmt = &ov5642_colour_fmts[0];

			priv->crop_rect.width = OV5642_DEFAULT_WIDTH;
			priv->crop_rect.height = OV5642_DEFAULT_HEIGHT;
			priv->crop_rect.left = (OV5642_MAX_WIDTH - OV5642_DEFAULT_WIDTH) / 2;
			priv->crop_rect.top = (OV5642_MAX_HEIGHT - OV5642_DEFAULT_HEIGHT) / 2;
			priv->crop_rect.width = OV5642_DEFAULT_WIDTH;
			priv->crop_rect.height = OV5642_DEFAULT_HEIGHT;
			priv->total_width = OV5642_DEFAULT_WIDTH + BLANKING_EXTRA_WIDTH;
			priv->total_height = BLANKING_MIN_HEIGHT;

	ret = ov5642_video_probe(client);		ret = ov5642_video_probe(client);
	if (ret < 0)		if (ret < 0)
	goto error;		goto error;