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media: i2c: imx290: Factor out black level setting to a function

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The black level programmed in the BLKLEVEL register depends on the
output format. The black level value computation is currently performed
in imx290_set_ctrl(), in addition to having different black level values
in the output-specific register value tables. Move it to a separate
function to simplify the imx290_set_ctrl() code.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Laurent Pinchart 2023-01-16 15:44:44 +01:00 • committed by Mauro Carvalho Chehab
parent 693b5cb598
commit ee4ce89366
1 changed files with 26 additions and 24 deletions
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50
drivers/media/i2c/imx290.c
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@ -152,6 +152,9 @@
#define IMX290_PIXEL_ARRAY_RECORDING_WIDTH 1920
#define IMX290_PIXEL_ARRAY_RECORDING_HEIGHT 1080
/* Equivalent value for 16bpp */
#define IMX290_BLACK_LEVEL_DEFAULT 3840
#define IMX290_NUM_SUPPLIES 3
struct imx290_regval {
@ -315,7 +318,6 @@ static const struct imx290_regval imx290_10bit_settings[] = {
{ IMX290_ADBIT2, IMX290_ADBIT2_10BIT },
{ IMX290_ADBIT3, IMX290_ADBIT3_10BIT },
{ IMX290_CSI_DT_FMT, IMX290_CSI_DT_FMT_RAW10 },
{ IMX290_BLKLEVEL, 60 },
};
static const struct imx290_regval imx290_12bit_settings[] = {
@ -325,7 +327,6 @@ static const struct imx290_regval imx290_12bit_settings[] = {
{ IMX290_ADBIT2, IMX290_ADBIT2_12BIT },
{ IMX290_ADBIT3, IMX290_ADBIT3_12BIT },
{ IMX290_CSI_DT_FMT, IMX290_CSI_DT_FMT_RAW12 },
{ IMX290_BLKLEVEL, 240 },
};
/* supported link frequencies */
@ -516,35 +517,40 @@ static int imx290_set_data_lanes(struct imx290 *imx290)
return ret;
}
static int imx290_set_black_level(struct imx290 *imx290,
unsigned int black_level, int *err)
{
return imx290_write(imx290, IMX290_BLKLEVEL,
black_level >> (16 - imx290->bpp), err);
}
static int imx290_write_current_format(struct imx290 *imx290)
{
const struct imx290_regval *regs;
unsigned int num_regs;
int ret;
switch (imx290->current_format.code) {
case MEDIA_BUS_FMT_SRGGB10_1X10:
ret = imx290_set_register_array(imx290, imx290_10bit_settings,
ARRAY_SIZE(
imx290_10bit_settings));
if (ret < 0) {
dev_err(imx290->dev, "Could not set format registers\n");
return ret;
}
regs = imx290_10bit_settings;
num_regs = ARRAY_SIZE(imx290_10bit_settings);
break;
case MEDIA_BUS_FMT_SRGGB12_1X12:
ret = imx290_set_register_array(imx290, imx290_12bit_settings,
ARRAY_SIZE(
imx290_12bit_settings));
if (ret < 0) {
dev_err(imx290->dev, "Could not set format registers\n");
return ret;
}
regs = imx290_12bit_settings;
num_regs = ARRAY_SIZE(imx290_12bit_settings);
break;
default:
dev_err(imx290->dev, "Unknown pixel format\n");
return -EINVAL;
}
return 0;
ret = imx290_set_register_array(imx290, regs, num_regs);
if (ret < 0) {
dev_err(imx290->dev, "Could not set format registers\n");
return ret;
}
return imx290_set_black_level(imx290, IMX290_BLACK_LEVEL_DEFAULT, &ret);
}
/* ----------------------------------------------------------------------------
@ -573,7 +579,7 @@ static int imx290_set_ctrl(struct v4l2_ctrl *ctrl)
case V4L2_CID_TEST_PATTERN:
if (ctrl->val) {
imx290_write(imx290, IMX290_BLKLEVEL, 0, &ret);
imx290_set_black_level(imx290, 0, &ret);
usleep_range(10000, 11000);
imx290_write(imx290, IMX290_PGCTRL,
(u8)(IMX290_PGCTRL_REGEN |
@ -582,12 +588,8 @@ static int imx290_set_ctrl(struct v4l2_ctrl *ctrl)
} else {
imx290_write(imx290, IMX290_PGCTRL, 0x00, &ret);
usleep_range(10000, 11000);
if (imx290->bpp == 10)
imx290_write(imx290, IMX290_BLKLEVEL, 0x3c,
&ret);
else /* 12 bits per pixel */
imx290_write(imx290, IMX290_BLKLEVEL, 0xf0,
&ret);
imx290_set_black_level(imx290, IMX290_BLACK_LEVEL_DEFAULT,
&ret);
}
break;
default: