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Subject: media: i2c: imx214: Explain some magic numbers
Author: André Apitzsch <g...@apitzsch.eu>
Date: Wed Dec 6 23:33:55 2023 +0100
Code refinement, no functional changes.
Reviewed-by: Ricardo Ribalda <riba...@chromium.org>
Reviewed-by: Kieran Bingham <kieran.bing...@ideasonboard.com>
Signed-off-by: André Apitzsch <g...@apitzsch.eu>
[Sakari Ailus: The control handler remains in the context struct still.]
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
drivers/media/i2c/imx214.c | 22 ++++++++++++++++++----
1 file changed, 18 insertions(+), 4 deletions(-)
---
diff --git a/drivers/media/i2c/imx214.c b/drivers/media/i2c/imx214.c
index 474c95572bf6..b3cb034c382f 100644
--- a/drivers/media/i2c/imx214.c
+++ b/drivers/media/i2c/imx214.c
@@ -19,12 +19,23 @@
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>
+#define IMX214_REG_MODE_SELECT 0x0100
+#define IMX214_MODE_STANDBY 0x00
+#define IMX214_MODE_STREAMING 0x01
+
#define IMX214_DEFAULT_CLK_FREQ 24000000
#define IMX214_DEFAULT_LINK_FREQ 480000000
#define IMX214_DEFAULT_PIXEL_RATE ((IMX214_DEFAULT_LINK_FREQ * 8LL) / 10)
#define IMX214_FPS 30
#define IMX214_MBUS_CODE MEDIA_BUS_FMT_SRGGB10_1X10
+/* Exposure control */
+#define IMX214_REG_EXPOSURE 0x0202
+#define IMX214_EXPOSURE_MIN 0
+#define IMX214_EXPOSURE_MAX 3184
+#define IMX214_EXPOSURE_STEP 1
+#define IMX214_EXPOSURE_DEFAULT 3184
+
static const char * const imx214_supply_name[] = {
"vdda",
"vddd",
@@ -665,7 +676,7 @@ static int imx214_set_ctrl(struct v4l2_ctrl *ctrl)
case V4L2_CID_EXPOSURE:
vals[1] = ctrl->val;
vals[0] = ctrl->val >> 8;
- ret = regmap_bulk_write(imx214->regmap, 0x202, vals, 2);
+ ret = regmap_bulk_write(imx214->regmap, IMX214_REG_EXPOSURE,
vals, 2);
if (ret < 0)
dev_err(imx214->dev, "Error %d\n", ret);
ret = 0;
@@ -743,7 +754,7 @@ static int imx214_start_streaming(struct imx214 *imx214)
dev_err(imx214->dev, "could not sync v4l2 controls\n");
goto error;
}
- ret = regmap_write(imx214->regmap, 0x100, 1);
+ ret = regmap_write(imx214->regmap, IMX214_REG_MODE_SELECT,
IMX214_MODE_STREAMING);
if (ret < 0) {
dev_err(imx214->dev, "could not sent start table %d\n", ret);
goto error;
@@ -761,7 +772,7 @@ static int imx214_stop_streaming(struct imx214 *imx214)
{
int ret;
- ret = regmap_write(imx214->regmap, 0x100, 0);
+ ret = regmap_write(imx214->regmap, IMX214_REG_MODE_SELECT,
IMX214_MODE_STANDBY);
if (ret < 0)
dev_err(imx214->dev, "could not sent stop table %d\n", ret);
@@ -997,7 +1008,10 @@ static int imx214_probe(struct i2c_client *client)
*/
imx214->exposure = v4l2_ctrl_new_std(&imx214->ctrls, &imx214_ctrl_ops,
V4L2_CID_EXPOSURE,
- 0, 3184, 1, 0x0c70);
+ IMX214_EXPOSURE_MIN,
+ IMX214_EXPOSURE_MAX,
+ IMX214_EXPOSURE_STEP,
+ IMX214_EXPOSURE_DEFAULT);
imx214->unit_size = v4l2_ctrl_new_std_compound(&imx214->ctrls,
NULL,
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