Add a device tree boolean property "bt656-4" to allow setting
the ITU-R BT.656-4 compatible bit.
Signed-off-by: Steve Longerbeam <steve_longerb...@mentor.com>
---
drivers/media/i2c/adv7180.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/media/i2c/adv7180.c b/drivers/media/i2c/adv7180.c
index 92e2f37..fff887c 100644
--- a/drivers/media/i2c/adv7180.c
+++ b/drivers/media/i2c/adv7180.c
@@ -58,7 +58,7 @@
#define ADV7180_REG_OUTPUT_CONTROL 0x0003
#define ADV7180_REG_EXTENDED_OUTPUT_CONTROL 0x0004
-#define ADV7180_EXTENDED_OUTPUT_CONTROL_NTSCDIS 0xC5
+#define ADV7180_EXTENDED_OUTPUT_CONTROL_BT656_4 0x80
#define ADV7180_REG_AUTODETECT_ENABLE 0x0007
#define ADV7180_AUTODETECT_DEFAULT 0x7f
@@ -216,6 +216,7 @@ struct adv7180_state {
struct gpio_desc *pwdn_gpio;
v4l2_std_id curr_norm;
bool autodetect;
+ bool bt656_4; /* use bt.656-4 standard for NTSC */
bool powered;
u8 input;
@@ -1281,6 +1282,17 @@ static int init_device(struct adv7180_state *state)
if (ret)
goto out_unlock;
+ if (state->bt656_4) {
+ ret = adv7180_read(state, ADV7180_REG_EXTENDED_OUTPUT_CONTROL);
+ if (ret < 0)
+ goto out_unlock;
+ ret |= ADV7180_EXTENDED_OUTPUT_CONTROL_BT656_4;
+ ret = adv7180_write(state, ADV7180_REG_EXTENDED_OUTPUT_CONTROL,
+ ret);
+ if (ret < 0)
+ goto out_unlock;
+ }
+
ret = adv7180_program_std(state);
if (ret)
goto out_unlock;
@@ -1332,6 +1344,10 @@ static int adv7180_of_parse(struct adv7180_state *state)
return PTR_ERR(state->pwdn_gpio);
}
+ /* select ITU-R BT.656-4 compatible? */
+ if (of_property_read_bool(client->dev.of_node, "bt656-4"))
+ state->bt656_4 = true;
+
return 0;
}
--
1.9.1
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