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authorFabio Estevam <festevam@gmail.com>2022-04-27 16:50:25 +0300
committerMauro Carvalho Chehab <mchehab@kernel.org>2022-05-17 10:12:23 +0300
commita76c86f4274e224ea8e85f284d0371442f78b13a (patch)
treed1959151182002f63debe0c093044d909c484b42 /drivers/media
parent7a12903182c8c0e3ba61eb9c5bdf160f337686c5 (diff)
downloadlinux-a76c86f4274e224ea8e85f284d0371442f78b13a.tar.xz
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: Fabio Estevam <festevam@gmail.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/i2c/adv7180.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/media/i2c/adv7180.c b/drivers/media/i2c/adv7180.c
index 4f5db195e66d..e3a57c178c6b 100644
--- a/drivers/media/i2c/adv7180.c
+++ b/drivers/media/i2c/adv7180.c
@@ -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;