diff options
| author | Tarang Raval <tarang.raval@siliconsignals.io> | 2025-10-31 17:18:35 +0530 |
|---|---|---|
| committer | Hans Verkuil <hverkuil+cisco@kernel.org> | 2025-11-13 10:57:52 +0100 |
| commit | 9a9ba098e7ba6b89efaddeabf0716a84a0f54c99 (patch) | |
| tree | 6d5d965af241db039928f12d2d0dac014bf9829d | |
| parent | dff10c7044e8777bd14bba99444ff8a69d9bb2fe (diff) | |
media: i2c: imx219: Replace exposure magic value with named constant
Introduce IMX219_EXPOSURE_OFFSET (4) and use it instead of the literal
'4' when computing the maximum coarse exposure. The IMX219 datasheet
specifies the maximum storage time as frame_length_lines - 4.
(Ref: Datasheet section 5-7-1)
Also fix one indentation issue for consistency.
Signed-off-by: Tarang Raval <tarang.raval@siliconsignals.io>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
| -rw-r--r-- | drivers/media/i2c/imx219.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c index 40693635c0c3..bc55fe2a93b4 100644 --- a/drivers/media/i2c/imx219.c +++ b/drivers/media/i2c/imx219.c @@ -68,6 +68,7 @@ #define IMX219_EXPOSURE_STEP 1 #define IMX219_EXPOSURE_DEFAULT 0x640 #define IMX219_EXPOSURE_MAX 65535 +#define IMX219_EXPOSURE_OFFSET 4 /* V_TIMING internal */ #define IMX219_REG_FRM_LENGTH_A CCI_REG16(0x0160) @@ -450,9 +451,9 @@ static int imx219_set_ctrl(struct v4l2_ctrl *ctrl) int exposure_max, exposure_def; /* Update max exposure while meeting expected vblanking */ - exposure_max = format->height + ctrl->val - 4; + exposure_max = format->height + ctrl->val - IMX219_EXPOSURE_OFFSET; exposure_def = (exposure_max < IMX219_EXPOSURE_DEFAULT) ? - exposure_max : IMX219_EXPOSURE_DEFAULT; + exposure_max : IMX219_EXPOSURE_DEFAULT; ret = __v4l2_ctrl_modify_range(imx219->exposure, imx219->exposure->minimum, exposure_max, @@ -579,9 +580,9 @@ static int imx219_init_controls(struct imx219 *imx219) IMX219_LLP_MIN - mode->width, IMX219_LLP_MAX - mode->width, 1, IMX219_LLP_MIN - mode->width); - exposure_max = mode->fll_def - 4; + exposure_max = mode->fll_def - IMX219_EXPOSURE_OFFSET; exposure_def = (exposure_max < IMX219_EXPOSURE_DEFAULT) ? - exposure_max : IMX219_EXPOSURE_DEFAULT; + exposure_max : IMX219_EXPOSURE_DEFAULT; imx219->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, V4L2_CID_EXPOSURE, IMX219_EXPOSURE_MIN, exposure_max, @@ -900,9 +901,9 @@ static int imx219_set_pad_format(struct v4l2_subdev *sd, return ret; /* Update max exposure while meeting expected vblanking */ - exposure_max = mode->fll_def - 4; + exposure_max = mode->fll_def - IMX219_EXPOSURE_OFFSET; exposure_def = (exposure_max < IMX219_EXPOSURE_DEFAULT) ? - exposure_max : IMX219_EXPOSURE_DEFAULT; + exposure_max : IMX219_EXPOSURE_DEFAULT; ret = __v4l2_ctrl_modify_range(imx219->exposure, imx219->exposure->minimum, exposure_max, |