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media: i2c: imx258: add HDR control

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The IMX258 supports High Dynamic Range with 5 levels of low/high
exposure ratio.  Add a V4L2 control for HDR (WIDE_DYNAMIC_RANGE).

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Krzysztof Kozlowski 2020-10-05 17:15:58 +02:00 committed by Mauro Carvalho Chehab
parent dd90caa011
commit c6f9d67e2a
1 changed files with 28 additions and 0 deletions
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28
drivers/media/i2c/imx258.c
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@ -61,6 +61,15 @@
#define IMX258_DGTL_GAIN_DEFAULT 1024
#define IMX258_DGTL_GAIN_STEP 1
/* HDR control */
#define IMX258_REG_HDR 0x0220
#define IMX258_HDR_ON BIT(0)
#define IMX258_REG_HDR_RATIO 0x0222
#define IMX258_HDR_RATIO_MIN 0
#define IMX258_HDR_RATIO_MAX 5
#define IMX258_HDR_RATIO_STEP 1
#define IMX258_HDR_RATIO_DEFAULT 0x0
/* Test Pattern Control */
#define IMX258_REG_TEST_PATTERN 0x0600
@ -777,6 +786,22 @@ static int imx258_set_ctrl(struct v4l2_ctrl *ctrl)
!ctrl->val ? REG_CONFIG_MIRROR_FLIP :
REG_CONFIG_FLIP_TEST_PATTERN);
break;
case V4L2_CID_WIDE_DYNAMIC_RANGE:
if (!ctrl->val) {
ret = imx258_write_reg(imx258, IMX258_REG_HDR,
IMX258_REG_VALUE_08BIT,
IMX258_HDR_RATIO_MIN);
} else {
ret = imx258_write_reg(imx258, IMX258_REG_HDR,
IMX258_REG_VALUE_08BIT,
IMX258_HDR_ON);
if (ret)
break;
ret = imx258_write_reg(imx258, IMX258_REG_HDR_RATIO,
IMX258_REG_VALUE_08BIT,
BIT(IMX258_HDR_RATIO_MAX));
}
break;
default:
dev_info(&client->dev,
"ctrl(id:0x%x,val:0x%x) is not handled\n",
@ -1193,6 +1218,9 @@ static int imx258_init_controls(struct imx258 *imx258)
IMX258_DGTL_GAIN_STEP,
IMX258_DGTL_GAIN_DEFAULT);
v4l2_ctrl_new_std(ctrl_hdlr, &imx258_ctrl_ops, V4L2_CID_WIDE_DYNAMIC_RANGE,
0, 1, 1, IMX258_HDR_RATIO_DEFAULT);
v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &imx258_ctrl_ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(imx258_test_pattern_menu) - 1,