Commit a76c86f4 authored by Fabio Estevam's avatar Fabio Estevam Committed by Mauro Carvalho Chehab
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media: i2c: adv7180: Add support for the test patterns 



ADV7180 has a built-in mechanism to generate some video patterns,
which is very useful for debug/bring-up activities.

Add support for it.

The test_pattern parameter can be one of the following values:

	0:	"Single color"
	1:	"Color bars"
	2:	"Luma ramp"
	3:	"Boundary box"
	4:	"Disable"

Tested on a imx6q board with an ADV7280.

Signed-off-by: default avatarFabio Estevam <festevam@gmail.com>
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@kernel.org>
parent 7a129031

drivers/media/i2c/adv7180.c

+46 −0
Original line number Diff line number Diff line
@@ -66,6 +66,9 @@ 
#define ADV7180_HUE_DEF		0

#define ADV7180_HUE_MAX		128



#define ADV7180_REG_DEF_VALUE_Y	0x000c

#define ADV7180_DEF_VAL_EN		0x1

#define ADV7180_DEF_VAL_AUTO_EN	0x2

#define ADV7180_REG_CTRL		0x000e

#define ADV7180_CTRL_IRQ_SPACE		0x20
@@ -549,6 +552,40 @@ static int adv7180_s_power(struct v4l2_subdev *sd, int on) 
	return ret;

}



static const char * const test_pattern_menu[] = {

	"Single color",

	"Color bars",

	"Luma ramp",

	"Boundary box",

	"Disable",

};



static int adv7180_test_pattern(struct adv7180_state *state, int value)

{

	unsigned int reg = 0;



	/* Map menu value into register value */

	if (value < 3)

		reg = value;

	if (value == 3)

		reg = 5;



	adv7180_write(state, ADV7180_REG_ANALOG_CLAMP_CTL, reg);



	if (value == ARRAY_SIZE(test_pattern_menu) - 1) {

		reg = adv7180_read(state, ADV7180_REG_DEF_VALUE_Y);

		reg &= ~ADV7180_DEF_VAL_EN;

		adv7180_write(state, ADV7180_REG_DEF_VALUE_Y, reg);

		return 0;

	}



	reg = adv7180_read(state, ADV7180_REG_DEF_VALUE_Y);

	reg |= ADV7180_DEF_VAL_EN | ADV7180_DEF_VAL_AUTO_EN;

	adv7180_write(state, ADV7180_REG_DEF_VALUE_Y, reg);



	return 0;

}



static int adv7180_s_ctrl(struct v4l2_ctrl *ctrl)

{

	struct v4l2_subdev *sd = to_adv7180_sd(ctrl);
@@ -592,6 +629,9 @@ static int adv7180_s_ctrl(struct v4l2_ctrl *ctrl) 
			adv7180_write(state, ADV7180_REG_FLCONTROL, 0x00);

		}

		break;

	case V4L2_CID_TEST_PATTERN:

		ret = adv7180_test_pattern(state, val);

		break;

	default:

		ret = -EINVAL;

	}
@@ -632,6 +672,12 @@ static int adv7180_init_controls(struct adv7180_state *state) 
			  ADV7180_HUE_MAX, 1, ADV7180_HUE_DEF);

	v4l2_ctrl_new_custom(&state->ctrl_hdl, &adv7180_ctrl_fast_switch, NULL);



	v4l2_ctrl_new_std_menu_items(&state->ctrl_hdl, &adv7180_ctrl_ops,

				      V4L2_CID_TEST_PATTERN,

				      ARRAY_SIZE(test_pattern_menu) - 1,

				      0, ARRAY_SIZE(test_pattern_menu) - 1,

				      test_pattern_menu);



	state->sd.ctrl_handler = &state->ctrl_hdl;

	if (state->ctrl_hdl.error) {

		int err = state->ctrl_hdl.error;