Commit 827c7e69 authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Sakari Ailus
Browse files

media: i2c: imx290: Add exposure time control 



Support configuring the exposure time, which is expressed as the
complement of the exposure time (frame period minus integration time).
The frame period is currently fixed.

Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: default avatarAlexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: default avatarDave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
parent 79d99ae8

drivers/media/i2c/imx290.c

+14 −2
Original line number Diff line number Diff line
@@ -103,6 +103,8 @@ 
#define IMX290_PGCTRL_THRU				BIT(1)

#define IMX290_PGCTRL_MODE(n)				((n) << 4)



#define IMX290_VMAX_DEFAULT				1125



static const char * const imx290_supply_name[] = {

	"vdda",

	"vddd",
@@ -176,7 +178,7 @@ static const char * const imx290_test_pattern_menu[] = { 


static const struct imx290_regval imx290_global_init_settings[] = {

	{ IMX290_CTRL_07, IMX290_WINMODE_1080P },

	{ IMX290_VMAX, 1125 },

	{ IMX290_VMAX, IMX290_VMAX_DEFAULT },

	{ IMX290_EXTCK_FREQ, 0x2520 },

	{ IMX290_WINWV_OB, 12 },

	{ IMX290_WINPH, 0 },
@@ -480,6 +482,12 @@ static int imx290_set_ctrl(struct v4l2_ctrl *ctrl) 
	case V4L2_CID_GAIN:

		ret = imx290_write(imx290, IMX290_GAIN, ctrl->val, NULL);

		break;



	case V4L2_CID_EXPOSURE:

		ret = imx290_write(imx290, IMX290_SHS1,

				   IMX290_VMAX_DEFAULT - ctrl->val - 1, NULL);

		break;



	case V4L2_CID_TEST_PATTERN:

		if (ctrl->val) {

			imx290_write(imx290, IMX290_BLKLEVEL, 0, &ret);
@@ -1008,12 +1016,16 @@ static int imx290_probe(struct i2c_client *client) 
	 */

	imx290_entity_init_cfg(&imx290->sd, NULL);



	v4l2_ctrl_handler_init(&imx290->ctrls, 4);

	v4l2_ctrl_handler_init(&imx290->ctrls, 5);

	imx290->ctrls.lock = &imx290->lock;



	v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,

			  V4L2_CID_GAIN, 0, 72, 1, 0);



	v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,

			  V4L2_CID_EXPOSURE, 1, IMX290_VMAX_DEFAULT - 2, 1,

			  IMX290_VMAX_DEFAULT - 2);



	imx290->link_freq =

		v4l2_ctrl_new_int_menu(&imx290->ctrls, &imx290_ctrl_ops,

				       V4L2_CID_LINK_FREQ,