Commit c6f9d67e authored by Krzysztof Kozlowski's avatar Krzysztof Kozlowski Committed by Mauro Carvalho Chehab
Browse files

media: i2c: imx258: add HDR control 



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: default avatarKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent dd90caa0

drivers/media/i2c/imx258.c

+28 −0
Original line number Diff line number Diff line
@@ -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,