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| author |   Fabio Estevam <festevam@gmail.com> | 2022-04-27 15:50:25 +0200 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab@kernel.org> | 2022-05-17 09:12:23 +0200 |
| commit | a76c86f4274e224ea8e85f284d0371442f78b13a (patch) | |
| tree | d1959151182002f63debe0c093044d909c484b42 /drivers/media | |
| parent | media: ti: cal: use frame desc to get vc and dt (diff) | |
| download | linux-dev-a76c86f4274e224ea8e85f284d0371442f78b13a.tar.xz linux-dev-a76c86f4274e224ea8e85f284d0371442f78b13a.zip | |
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.c | 46 |
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; |