[media] mt9v032: Fix binning configuration
The sensor can scale the image down using binning by 1, 2 or 4 in both directions. Update size enumeration and ratio and binning factor computation accordingly. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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@ -127,6 +127,8 @@ struct mt9v032 {
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struct v4l2_mbus_framefmt format;
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struct v4l2_rect crop;
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unsigned int hratio;
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unsigned int vratio;
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struct v4l2_ctrl_handler ctrls;
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struct {
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@ -311,22 +313,20 @@ static int mt9v032_s_stream(struct v4l2_subdev *subdev, int enable)
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| MT9V032_CHIP_CONTROL_SEQUENTIAL;
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struct i2c_client *client = v4l2_get_subdevdata(subdev);
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struct mt9v032 *mt9v032 = to_mt9v032(subdev);
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struct v4l2_mbus_framefmt *format = &mt9v032->format;
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struct v4l2_rect *crop = &mt9v032->crop;
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unsigned int hratio;
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unsigned int vratio;
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unsigned int hbin;
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unsigned int vbin;
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int ret;
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if (!enable)
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return mt9v032_set_chip_control(mt9v032, mode, 0);
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/* Configure the window size and row/column bin */
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hratio = DIV_ROUND_CLOSEST(crop->width, format->width);
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vratio = DIV_ROUND_CLOSEST(crop->height, format->height);
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hbin = fls(mt9v032->hratio) - 1;
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vbin = fls(mt9v032->vratio) - 1;
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ret = mt9v032_write(client, MT9V032_READ_MODE,
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(hratio - 1) << MT9V032_READ_MODE_ROW_BIN_SHIFT |
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(vratio - 1) << MT9V032_READ_MODE_COLUMN_BIN_SHIFT);
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hbin << MT9V032_READ_MODE_COLUMN_BIN_SHIFT |
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vbin << MT9V032_READ_MODE_ROW_BIN_SHIFT);
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if (ret < 0)
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return ret;
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@ -369,12 +369,12 @@ static int mt9v032_enum_frame_size(struct v4l2_subdev *subdev,
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struct v4l2_subdev_fh *fh,
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struct v4l2_subdev_frame_size_enum *fse)
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{
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if (fse->index >= 8 || fse->code != V4L2_MBUS_FMT_SGRBG10_1X10)
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if (fse->index >= 3 || fse->code != V4L2_MBUS_FMT_SGRBG10_1X10)
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return -EINVAL;
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fse->min_width = MT9V032_WINDOW_WIDTH_DEF / fse->index;
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fse->min_width = MT9V032_WINDOW_WIDTH_DEF / (1 << fse->index);
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fse->max_width = fse->min_width;
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fse->min_height = MT9V032_WINDOW_HEIGHT_DEF / fse->index;
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fse->min_height = MT9V032_WINDOW_HEIGHT_DEF / (1 << fse->index);
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fse->max_height = fse->min_height;
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return 0;
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@ -391,18 +391,30 @@ static int mt9v032_get_format(struct v4l2_subdev *subdev,
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return 0;
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}
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static void mt9v032_configure_pixel_rate(struct mt9v032 *mt9v032,
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unsigned int hratio)
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static void mt9v032_configure_pixel_rate(struct mt9v032 *mt9v032)
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{
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struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
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int ret;
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ret = v4l2_ctrl_s_ctrl_int64(mt9v032->pixel_rate,
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mt9v032->sysclk / hratio);
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mt9v032->sysclk / mt9v032->hratio);
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if (ret < 0)
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dev_warn(&client->dev, "failed to set pixel rate (%d)\n", ret);
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}
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static unsigned int mt9v032_calc_ratio(unsigned int input, unsigned int output)
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{
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/* Compute the power-of-two binning factor closest to the input size to
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* output size ratio. Given that the output size is bounded by input/4
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* and input, a generic implementation would be an ineffective luxury.
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*/
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if (output * 3 > input * 2)
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return 1;
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if (output * 3 > input)
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return 2;
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return 4;
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}
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static int mt9v032_set_format(struct v4l2_subdev *subdev,
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struct v4l2_subdev_fh *fh,
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struct v4l2_subdev_format *format)
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@ -420,21 +432,25 @@ static int mt9v032_set_format(struct v4l2_subdev *subdev,
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/* Clamp the width and height to avoid dividing by zero. */
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width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
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max(__crop->width / 8, MT9V032_WINDOW_WIDTH_MIN),
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max(__crop->width / 4, MT9V032_WINDOW_WIDTH_MIN),
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__crop->width);
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height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
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max(__crop->height / 8, MT9V032_WINDOW_HEIGHT_MIN),
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max(__crop->height / 4, MT9V032_WINDOW_HEIGHT_MIN),
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__crop->height);
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hratio = DIV_ROUND_CLOSEST(__crop->width, width);
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vratio = DIV_ROUND_CLOSEST(__crop->height, height);
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hratio = mt9v032_calc_ratio(__crop->width, width);
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vratio = mt9v032_calc_ratio(__crop->height, height);
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__format = __mt9v032_get_pad_format(mt9v032, fh, format->pad,
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format->which);
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__format->width = __crop->width / hratio;
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__format->height = __crop->height / vratio;
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if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
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mt9v032_configure_pixel_rate(mt9v032, hratio);
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if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
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mt9v032->hratio = hratio;
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mt9v032->vratio = vratio;
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mt9v032_configure_pixel_rate(mt9v032);
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}
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format->format = *__format;
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@ -490,8 +506,11 @@ static int mt9v032_set_crop(struct v4l2_subdev *subdev,
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crop->which);
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__format->width = rect.width;
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__format->height = rect.height;
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if (crop->which == V4L2_SUBDEV_FORMAT_ACTIVE)
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mt9v032_configure_pixel_rate(mt9v032, 1);
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if (crop->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
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mt9v032->hratio = 1;
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mt9v032->vratio = 1;
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mt9v032_configure_pixel_rate(mt9v032);
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}
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}
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*__crop = rect;
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@ -665,7 +684,7 @@ static int mt9v032_registered(struct v4l2_subdev *subdev)
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dev_info(&client->dev, "MT9V032 detected at address 0x%02x\n",
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client->addr);
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mt9v032_configure_pixel_rate(mt9v032, 1);
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mt9v032_configure_pixel_rate(mt9v032);
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return ret;
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}
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@ -824,6 +843,9 @@ static int mt9v032_probe(struct i2c_client *client,
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mt9v032->format.field = V4L2_FIELD_NONE;
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mt9v032->format.colorspace = V4L2_COLORSPACE_SRGB;
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mt9v032->hratio = 1;
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mt9v032->vratio = 1;
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mt9v032->aec_agc = MT9V032_AEC_ENABLE | MT9V032_AGC_ENABLE;
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mt9v032->hblank = MT9V032_HORIZONTAL_BLANKING_DEF;
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mt9v032->sysclk = MT9V032_SYSCLK_FREQ_DEF;
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