Commit 114df304 authored by Jacopo Mondi's avatar Jacopo Mondi Committed by Mauro Carvalho Chehab
Browse files

media: ar0521: Add V4L2_CID_ANALOG_GAIN 



Add support for V4L2_CID_ANALOG_GAIN. The control programs the global
gain register which applies to all color channels.

Signed-off-by: default avatarJacopo Mondi <jacopo@jmondi.org>
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@kernel.org>
parent f7910135

drivers/media/i2c/ar0521.c

+16 −0
Original line number Diff line number Diff line
@@ -35,6 +35,11 @@ 
#define AR0521_HEIGHT_BLANKING_MIN     38u /* must be even */

#define AR0521_TOTAL_WIDTH_MIN	     2968u



#define AR0521_ANA_GAIN_MIN		0x00

#define AR0521_ANA_GAIN_MAX		0x3f

#define AR0521_ANA_GAIN_STEP		0x01

#define AR0521_ANA_GAIN_DEFAULT		0x00



/* AR0521 registers */

#define AR0521_REG_VT_PIX_CLK_DIV		0x0300

#define AR0521_REG_FRAME_LENGTH_LINES		0x0340
@@ -50,6 +55,8 @@ 
#define   AR0521_REG_RESET_RESTART		  BIT(1)

#define   AR0521_REG_RESET_INIT			  BIT(0)



#define AR0521_REG_ANA_GAIN_CODE_GLOBAL		0x3028



#define AR0521_REG_GREEN1_GAIN			0x3056

#define AR0521_REG_BLUE_GAIN			0x3058

#define AR0521_REG_RED_GAIN			0x305A
@@ -455,6 +462,10 @@ static int ar0521_s_ctrl(struct v4l2_ctrl *ctrl) 
	case V4L2_CID_VBLANK:

		ret = ar0521_set_geometry(sensor);

		break;

	case V4L2_CID_ANALOGUE_GAIN:

		ret = ar0521_write_reg(sensor, AR0521_REG_ANA_GAIN_CODE_GLOBAL,

				       ctrl->val);

		break;

	case V4L2_CID_GAIN:

	case V4L2_CID_RED_BALANCE:

	case V4L2_CID_BLUE_BALANCE:
@@ -498,6 +509,11 @@ static int ar0521_init_controls(struct ar0521_dev *sensor) 
	/* We can use our own mutex for the ctrl lock */

	hdl->lock = &sensor->lock;



	/* Analog gain */

	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_ANALOGUE_GAIN,

			  AR0521_ANA_GAIN_MIN, AR0521_ANA_GAIN_MAX,

			  AR0521_ANA_GAIN_STEP, AR0521_ANA_GAIN_DEFAULT);



	/* Manual gain */

	ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN, 0, 511, 1, 0);

	ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE,