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media: i2c: adv7180: Add support for the test patterns

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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: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Fabio Estevam 2022-04-27 15:50:25 +02:00 committed by Mauro Carvalho Chehab
parent 7a12903182
commit a76c86f427
1 changed files with 46 additions and 0 deletions
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46
drivers/media/i2c/adv7180.c
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@ -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;