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media: i2c: ov772x: Add support for BT.656 mode 

Add support to read the bus-type for V4L2_MBUS_BT656 and enable BT.656
mode in the sensor if needed.

For backward compatibility with older DTS where the bus-type property was
not mandatory, assume V4L2_MBUS_PARALLEL as it was the only supported bus
at the time. v4l2_fwnode_endpoint_alloc_parse() will not fail if
'bus-type' is not specified.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Lad Prabhakar 2020-10-03 00:23:22 +02:00 committed by Mauro Carvalho Chehab
parent 8a10b4e360
commit efcb7dda9b
1 changed files with 22 additions and 2 deletions
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24
drivers/media/i2c/ov772x.c
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@ -583,6 +583,14 @@ static int ov772x_s_stream(struct v4l2_subdev *sd, int enable)
if (priv->streaming == enable)
goto done;
if (priv->bus_type == V4L2_MBUS_BT656) {
ret = regmap_update_bits(priv->regmap, COM7, ITU656_ON_OFF,
enable ?
ITU656_ON_OFF : ~ITU656_ON_OFF);
if (ret)
goto done;
}
ret = regmap_update_bits(priv->regmap, COM2, SOFT_SLEEP_MODE,
enable ? 0 : SOFT_SLEEP_MODE);
if (ret)
@ -1365,9 +1373,21 @@ static int ov772x_parse_dt(struct i2c_client *client,
return -EINVAL;
}
/*
* For backward compatibility with older DTS where the
* bus-type property was not mandatory, assume
* V4L2_MBUS_PARALLEL as it was the only supported bus at the
* time. v4l2_fwnode_endpoint_alloc_parse() will not fail if
* 'bus-type' is not specified.
*/
ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
if (ret)
goto error_fwnode_put;
if (ret) {
bus_cfg = (struct v4l2_fwnode_endpoint)
{ .bus_type = V4L2_MBUS_BT656 };
ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
if (ret)
goto error_fwnode_put;
}
priv->bus_type = bus_cfg.bus_type;
v4l2_fwnode_endpoint_free(&bus_cfg);