#define IMX258_HDR_RATIO_STEP 1
#define IMX258_HDR_RATIO_DEFAULT 0x0
+/* Long exposure multiplier */
+#define IMX258_LONG_EXP_SHIFT_MAX 7
+#define IMX258_LONG_EXP_SHIFT_REG 0x3002
+
/* Test Pattern Control */
#define IMX258_REG_TEST_PATTERN 0x0600
struct v4l2_ctrl *exposure;
struct v4l2_ctrl *hflip;
struct v4l2_ctrl *vflip;
+ /* Current long exposure factor in use. Set through V4L2_CID_VBLANK */
+ unsigned int long_exp_shift;
/* Current mode */
const struct imx258_mode *cur_mode;
exposure_def);
}
+static int imx258_set_frame_length(struct imx258 *imx258, unsigned int val)
+{
+ int ret;
+
+ imx258->long_exp_shift = 0;
+
+ while (val > IMX258_VTS_MAX) {
+ imx258->long_exp_shift++;
+ val >>= 1;
+ }
+
+ ret = imx258_write_reg(imx258, IMX258_REG_VTS,
+ IMX258_REG_VALUE_16BIT, val);
+ if (ret)
+ return ret;
+
+ return imx258_write_reg(imx258, IMX258_LONG_EXP_SHIFT_REG,
+ IMX258_REG_VALUE_08BIT, imx258->long_exp_shift);
+}
+
static int imx258_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct imx258 *imx258 =
case V4L2_CID_EXPOSURE:
ret = imx258_write_reg(imx258, IMX258_REG_EXPOSURE,
IMX258_REG_VALUE_16BIT,
- ctrl->val);
+ ctrl->val >> imx258->long_exp_shift);
break;
case V4L2_CID_DIGITAL_GAIN:
ret = imx258_update_digital_gain(imx258, IMX258_REG_VALUE_16BIT,
}
break;
case V4L2_CID_VBLANK:
- ret = imx258_write_reg(imx258, IMX258_REG_VTS,
- IMX258_REG_VALUE_16BIT,
- imx258->cur_mode->height + ctrl->val);
+ ret = imx258_set_frame_length(imx258,
+ imx258->cur_mode->height + ctrl->val);
break;
case V4L2_CID_VFLIP:
case V4L2_CID_HFLIP:
imx258->cur_mode->height;
__v4l2_ctrl_modify_range(
imx258->vblank, vblank_min,
- IMX258_VTS_MAX - imx258->cur_mode->height, 1,
- vblank_def);
+ ((1 << IMX258_LONG_EXP_SHIFT_MAX) * IMX258_VTS_MAX) -
+ imx258->cur_mode->height,
+ 1, vblank_def);
__v4l2_ctrl_s_ctrl(imx258->vblank, vblank_def);
h_blank =
imx258->link_freq_configs[mode->link_freq_index].pixels_per_line