I forgot the sign-off and just discovered checkpatch errors. I'll
repost the fixed version. Sorry for spam.
2011/9/6 Bastian Hecht <hechtb@xxxxxxxxxxxxxx>:
> This patch adds the ability to get arbitrary resolutions with a width
> up to 2592 and a height up to 720 pixels instead of the standard 1280x720
> only.
>
> ---
> diff --git a/drivers/media/video/ov5642.c b/drivers/media/video/ov5642.c
> index 6410bda..3d7038c 100644
> --- a/drivers/media/video/ov5642.c
> +++ b/drivers/media/video/ov5642.c
> @@ -14,8 +14,10 @@
> * published by the Free Software Foundation.
> */
>
> +#include <linux/bitops.h>
> #include <linux/delay.h>
> #include <linux/i2c.h>
> +#include <linux/kernel.h>
> #include <linux/slab.h>
> #include <linux/videodev2.h>
>
> @@ -34,7 +36,7 @@
> #define REG_WINDOW_START_Y_LOW 0x3803
> #define REG_WINDOW_WIDTH_HIGH 0x3804
> #define REG_WINDOW_WIDTH_LOW 0x3805
> -#define REG_WINDOW_HEIGHT_HIGH 0x3806
> +#define REG_WINDOW_HEIGHT_HIGH 0x3806
> #define REG_WINDOW_HEIGHT_LOW 0x3807
> #define REG_OUT_WIDTH_HIGH 0x3808
> #define REG_OUT_WIDTH_LOW 0x3809
> @@ -44,19 +46,44 @@
> #define REG_OUT_TOTAL_WIDTH_LOW 0x380d
> #define REG_OUT_TOTAL_HEIGHT_HIGH 0x380e
> #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.
> - * Works currently only for up to 720 lines
> - * eg. 320x240, 640x480, 800x600, 1280x720, 2048x720
> + * About OV5642 resolution, cropping and binning:
> + * This sensor supports it all, at least in the feature description.
> + * 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
> -#define OV5642_HEIGHT 720
> -#define OV5642_TOTAL_WIDTH 3200
> -#define OV5642_TOTAL_HEIGHT 2000
> -#define OV5642_SENSOR_SIZE_X 2592
> -#define OV5642_SENSOR_SIZE_Y 1944
> +/* default sizes */
> +#define OV5642_DEFAULT_WIDTH 1280
> +#define OV5642_DEFAULT_HEIGHT OV5642_MAX_HEIGHT
> +
> +/* minimum extra blanking */
> +#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 {
> u16 reg_num;
> @@ -581,6 +608,11 @@ struct ov5642_datafmt {
> struct ov5642 {
> struct v4l2_subdev subdev;
> 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[] = {
> @@ -641,6 +673,21 @@ static int reg_write(struct i2c_client *client, u16 reg, u8 val)
>
> 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
> static int ov5642_get_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
> {
> @@ -684,58 +731,55 @@ static int ov5642_write_array(struct i2c_client *client,
> 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;
> - 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)
> - ret = reg_write(client, REG_WINDOW_WIDTH_HIGH, width_high);
> - if (!ret)
> - ret = reg_write(client, REG_WINDOW_WIDTH_LOW , width_low);
> - if (!ret)
> - ret = reg_write(client, REG_WINDOW_HEIGHT_HIGH, height_high);
> - if (!ret)
> - ret = reg_write(client, REG_WINDOW_HEIGHT_LOW, height_low);
> + ret = reg_write16(client, REG_WINDOW_START_Y_HIGH, start_y);
> + if (!ret) {
> + priv->crop_rect.left = start_x;
> + priv->crop_rect.top = start_y;
> + }
>
> if (!ret)
> - ret = reg_write(client, REG_OUT_WIDTH_HIGH, width_high);
> + ret = reg_write16(client, REG_WINDOW_WIDTH_HIGH, width);
> if (!ret)
> - ret = reg_write(client, REG_OUT_WIDTH_LOW , width_low);
> - if (!ret)
> - ret = reg_write(client, REG_OUT_HEIGHT_HIGH, height_high);
> + ret = reg_write16(client, REG_WINDOW_HEIGHT_HIGH, height);
> + if (ret)
> + 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)
> - 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)
> - 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)
> - 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)
> - 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)
> - 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;
> }
> @@ -743,18 +787,18 @@ static int ov5642_set_resolution(struct i2c_client *client)
> static int ov5642_try_fmt(struct v4l2_subdev *sd,
> 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);
>
> - dev_dbg(sd->v4l2_dev->dev, "%s(%u) width: %u heigth: %u\n",
> - __func__, mf->code, mf->width, mf->height);
> + mf->width = priv->crop_rect.width;
> + mf->height = priv->crop_rect.height;
>
> if (!fmt) {
> mf->code = ov5642_colour_fmts[0].code;
> mf->colorspace = ov5642_colour_fmts[0].colorspace;
> }
>
> - mf->width = OV5642_WIDTH;
> - mf->height = OV5642_HEIGHT;
> mf->field = V4L2_FIELD_NONE;
>
> return 0;
> @@ -766,20 +810,13 @@ static int ov5642_s_fmt(struct v4l2_subdev *sd,
> struct i2c_client *client = v4l2_get_subdevdata(sd);
> 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 */
> if (!ov5642_find_datafmt(mf->code))
> return -EINVAL;
>
> ov5642_try_fmt(sd, mf);
> -
> 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;
> }
>
> @@ -793,8 +830,8 @@ static int ov5642_g_fmt(struct v4l2_subdev *sd,
>
> mf->code = fmt->code;
> mf->colorspace = fmt->colorspace;
> - mf->width = OV5642_WIDTH;
> - mf->height = OV5642_HEIGHT;
> + mf->width = priv->crop_rect.width;
> + mf->height = priv->crop_rect.height;
> mf->field = V4L2_FIELD_NONE;
>
> return 0;
> @@ -827,15 +864,44 @@ static int ov5642_g_chip_ident(struct v4l2_subdev *sd,
> 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)
> {
> + struct i2c_client *client = v4l2_get_subdevdata(sd);
> + struct ov5642 *priv = to_ov5642(client);
> struct v4l2_rect *rect = &a->c;
> +
> + if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
> + return -EINVAL;
>
> - a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> - rect->top = 0;
> - rect->left = 0;
> - rect->width = OV5642_WIDTH;
> - rect->height = OV5642_HEIGHT;
> + *rect = priv->crop_rect;
>
> return 0;
> }
> @@ -844,8 +910,8 @@ static int ov5642_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
> {
> a->bounds.left = 0;
> a->bounds.top = 0;
> - a->bounds.width = OV5642_WIDTH;
> - a->bounds.height = OV5642_HEIGHT;
> + a->bounds.width = OV5642_MAX_WIDTH;
> + a->bounds.height = OV5642_MAX_HEIGHT;
> a->defrect = a->bounds;
> a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> a->pixelaspect.numerator = 1;
> @@ -858,24 +924,37 @@ static int ov5642_g_mbus_config(struct v4l2_subdev *sd,
> struct v4l2_mbus_config *cfg)
> {
> cfg->type = V4L2_MBUS_CSI2;
> - cfg->flags = V4L2_MBUS_CSI2_2_LANE |
> - V4L2_MBUS_CSI2_CHANNEL_0 |
> - V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
> + cfg->flags = V4L2_MBUS_CSI2_2_LANE | V4L2_MBUS_CSI2_CHANNEL_0 |
> + V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
>
> return 0;
> }
>
> +static int ov5642_s_power(struct v4l2_subdev *sd, int on)
> +{
> + struct i2c_client *client = v4l2_get_subdevdata(sd);
> + int 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 = {
> .s_mbus_fmt = ov5642_s_fmt,
> .g_mbus_fmt = ov5642_g_fmt,
> .try_mbus_fmt = ov5642_try_fmt,
> .enum_mbus_fmt = ov5642_enum_fmt,
> + .s_crop = ov5642_s_crop,
> .g_crop = ov5642_g_crop,
> .cropcap = ov5642_cropcap,
> .g_mbus_config = ov5642_g_mbus_config,
> };
>
> static struct v4l2_subdev_core_ops ov5642_subdev_core_ops = {
> + .s_power = ov5642_s_power,
> .g_chip_ident = ov5642_g_chip_ident,
> #ifdef CONFIG_VIDEO_ADV_DEBUG
> .g_register = ov5642_get_register,
> @@ -941,8 +1020,17 @@ static int ov5642_probe(struct i2c_client *client,
>
> v4l2_i2c_subdev_init(&priv->subdev, client, &ov5642_subdev_ops);
>
> - icd->ops = NULL;
> - priv->fmt = &ov5642_colour_fmts[0];
> + icd->ops = NULL;
> + 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(icd, client);
> if (ret < 0)
> @@ -951,6 +1039,7 @@ static int ov5642_probe(struct i2c_client *client,
> return 0;
>
> error:
> + icd->ops = NULL;
> kfree(priv);
> return ret;
> }
> @@ -961,6 +1050,7 @@ static int ov5642_remove(struct i2c_client *client)
> struct soc_camera_device *icd = client->dev.platform_data;
> struct soc_camera_link *icl = to_soc_camera_link(icd);
>
> + icd->ops = NULL;
> if (icl->free_bus)
> icl->free_bus(icl);
> kfree(priv);
>
--
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