Hi Prabhakar,
On Thu, Sep 17, 2020 at 06:42:22PM +0100, Lad Prabhakar wrote:
> Parse endpoint properties using v4l2_fwnode_endpoint_alloc_parse()
> to determine the bus type and store it in the driver structure.
>
> Set bus_type to V4L2_MBUS_PARALLEL as it's the only supported one
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
> ---
> drivers/media/i2c/ov772x.c | 34 ++++++++++++++++++++++++++++++++++
> 1 file changed, 34 insertions(+)
>
> diff --git a/drivers/media/i2c/ov772x.c b/drivers/media/i2c/ov772x.c
> index 2cc6a678069a..f61a3f09ad64 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;
> };
>
> /*
> @@ -1348,6 +1350,34 @@ static const struct v4l2_subdev_ops ov772x_subdev_ops = {
> .pad = &ov772x_subdev_pad_ops,
> };
>
> +static int ov772x_parse_dt(struct i2c_client *client,
> + struct ov772x_priv *priv)
> +{
> + struct v4l2_fwnode_endpoint bus_cfg;
> + struct fwnode_handle *ep;
> + int ret;
> +
> + ep = fwnode_graph_get_next_endpoint(dev_fwnode(&client->dev),
> + NULL);
> + if (!ep) {
> + dev_err(&client->dev, "Endpoint node not found\n");
> + return -EINVAL;
> + }
> +
> + bus_cfg.bus_type = V4L2_MBUS_PARALLEL;
Please zero the entire struct, i.e. do this assignment in the declaration.
You can also use v4l2_fwnode_endpoint_parse() if you're not using the link
frequencies --- sensor drivers generally should but you could only add them
as optional at this point (out of scope of this patch).
> + 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);
> +
> +error_fwnode_put:
> + fwnode_handle_put(ep);
> +
> + return ret;
> +}
> +
> /*
> * i2c_driver function
> */
> @@ -1415,6 +1445,10 @@ static int ov772x_probe(struct i2c_client *client)
> goto error_clk_put;
> }
>
> + ret = ov772x_parse_dt(client, priv);
> + if (ret)
> + goto error_clk_put;
> +
> ret = ov772x_video_probe(priv);
> if (ret < 0)
> goto error_gpio_put;
> --
> 2.17.1
>
--
Sakari Ailus
