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Subject[PATCH v5 1/3] media: i2c: ov772x: Parse endpoint properties
Date
Parse endpoint properties using v4l2_fwnode_endpoint_alloc_parse()
to determine bus-type and store it locally in priv data.

v4l2_fwnode_endpoint_alloc_parse() with bus_type set to
V4L2_MBUS_PARALLEL falls back to V4L2_MBUS_PARALLEL thus handling
backward compatibility with existing DT where bus-type isn't specified.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
drivers/media/i2c/ov772x.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)

diff --git a/drivers/media/i2c/ov772x.c b/drivers/media/i2c/ov772x.c
index 2cc6a678069a..4ab4b3c883d0 100644
--- a/drivers/media/i2c/ov772x.c
+++ b/drivers/media/i2c/ov772x.c
@@ -31,6 +31,7 @@
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
+#include <media/v4l2-fwnode.h>
#include <media/v4l2-image-sizes.h>
#include <media/v4l2-subdev.h>

@@ -434,6 +435,7 @@ struct ov772x_priv {
#ifdef CONFIG_MEDIA_CONTROLLER
struct media_pad pad;
#endif
+ enum v4l2_mbus_type bus_type;
};

/*
@@ -1354,6 +1356,8 @@ static const struct v4l2_subdev_ops ov772x_subdev_ops = {

static int ov772x_probe(struct i2c_client *client)
{
+ struct v4l2_fwnode_endpoint bus_cfg;
+ struct fwnode_handle *ep;
struct ov772x_priv *priv;
int ret;
static const struct regmap_config ov772x_regmap_config = {
@@ -1415,6 +1419,27 @@ static int ov772x_probe(struct i2c_client *client)
goto error_clk_put;
}

+ ep = fwnode_graph_get_next_endpoint(dev_fwnode(&client->dev),
+ NULL);
+ if (!ep) {
+ dev_err(&client->dev, "endpoint node not found\n");
+ ret = -EINVAL;
+ goto error_clk_put;
+ }
+
+ /* For backward compatibility with the existing DT where
+ * bus-type isn't specified v4l2_fwnode_endpoint_alloc_parse()
+ * with bus_type set to V4L2_MBUS_PARALLEL falls back to
+ * V4L2_MBUS_PARALLEL
+ */
+ bus_cfg.bus_type = V4L2_MBUS_PARALLEL;
+ ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
+ priv->bus_type = bus_cfg.bus_type;
+ v4l2_fwnode_endpoint_free(&bus_cfg);
+ fwnode_handle_put(ep);
+ if (ret)
+ goto error_clk_put;
+
ret = ov772x_video_probe(priv);
if (ret < 0)
goto error_gpio_put;
--
2.17.1
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