[PATCH v4 1/8] media: adv7180: fix field type

[Steve Longerbeam <slongerbeam@gmail.com>]

From: Steve Longerbeam <slongerbeam@gmail.com>

The ADV7180 and ADV7182 transmit whole fields, bottom field followed
by top (or vice-versa, depending on detected video standard). So
for chips that do not have support for explicitly setting the field
mode via I2P, set the field mode to V4L2_FIELD_ALTERNATE.

Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

---

v4:
- switch V4L2_FIELD_SEQ_TB/V4L2_FIELD_SEQ_BT to V4L2_FIELD_ALTERNATE.
  This is from Niklas Söderlund.
- remove checks for ADV7180_FLAG_I2P when setting field mode, since I2P
  support is planned to be removed.
- move init of state->curr_norm back to its original location, since
  state->field init is no longer dependent on state->curr_norm.

v3: no changes

v2:
- the init of state->curr_norm in probe needs to be moved up, ahead
  of the init of state->field.
---
 drivers/media/i2c/adv7180.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/media/i2c/adv7180.c b/drivers/media/i2c/adv7180.c
index 95cbc85..192eeae 100644
--- a/drivers/media/i2c/adv7180.c
+++ b/drivers/media/i2c/adv7180.c
@@ -679,10 +679,10 @@ static int adv7180_set_pad_format(struct v4l2_subdev *sd,
 	switch (format->format.field) {
 	case V4L2_FIELD_NONE:
 		if (!(state->chip_info->flags & ADV7180_FLAG_I2P))
-			format->format.field = V4L2_FIELD_INTERLACED;
+			format->format.field = V4L2_FIELD_ALTERNATE;
 		break;
 	default:
-		format->format.field = V4L2_FIELD_INTERLACED;
+		format->format.field = V4L2_FIELD_ALTERNATE;
 		break;
 	}
 
@@ -1251,7 +1251,7 @@ static int adv7180_probe(struct i2c_client *client,
 		return -ENOMEM;
 
 	state->client = client;
-	state->field = V4L2_FIELD_INTERLACED;
+	state->field = V4L2_FIELD_ALTERNATE;
 	state->chip_info = (struct adv7180_chip_info *)id->driver_data;
 
 	if (state->chip_info->flags & ADV7180_FLAG_MIPI_CSI2) {
-- 
1.9.1