Hi Hans,
On Fri, Mar 10, 2017 at 11:26:11AM +0100, Hans Verkuil wrote:
> From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
>
> The MC support is needed by the em28xx driver.
>
> Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
> ---
> drivers/media/i2c/ov2640.c | 21 +++++++++++++++++++--
> 1 file changed, 19 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/i2c/ov2640.c b/drivers/media/i2c/ov2640.c
> index 0445963c5fae..00df042fd6f1 100644
> --- a/drivers/media/i2c/ov2640.c
> +++ b/drivers/media/i2c/ov2640.c
> @@ -282,6 +282,9 @@ struct ov2640_win_size {
>
> struct ov2640_priv {
> struct v4l2_subdev subdev;
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> + struct media_pad pad;
> +#endif
> struct v4l2_ctrl_handler hdl;
> u32 cfmt_code;
> struct clk *clk;
> @@ -1073,19 +1076,30 @@ static int ov2640_probe(struct i2c_client *client,
> ret = priv->hdl.error;
> goto err_hdl;
> }
As this is a sensor the format etc. should be accessible from the user
space, shouldn't you have V4L2_SUBDEV_FL_HAS_DEVNODE flag for the
sub-device as well?
The device node isn't exposed unless v4l2_device_register_subdev_nodes() is
called anyway.
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> + priv->pad.flags = MEDIA_PAD_FL_SOURCE;
> + priv->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
> + ret = media_entity_pads_init(&priv->subdev.entity, 1, &priv->pad);
> + if (ret < 0)
> + goto err_hdl;
> +#endif
>
> ret = ov2640_video_probe(client);
> if (ret < 0)
> - goto err_hdl;
> + goto err_videoprobe;
>
> ret = v4l2_async_register_subdev(&priv->subdev);
> if (ret < 0)
> - goto err_hdl;
> + goto err_videoprobe;
>
> dev_info(&adapter->dev, "OV2640 Probed\n");
>
> return 0;
>
> +err_videoprobe:
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> + media_entity_cleanup(&priv->subdev.entity);
I believe you can call media_entity_cleanup() as the function does nothing
right now. In general, we should provide nop variants if MC is disabled.
> +#endif
> err_hdl:
> v4l2_ctrl_handler_free(&priv->hdl);
> err_clk:
> @@ -1099,6 +1113,9 @@ static int ov2640_remove(struct i2c_client *client)
>
> v4l2_async_unregister_subdev(&priv->subdev);
> v4l2_ctrl_handler_free(&priv->hdl);
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> + media_entity_cleanup(&priv->subdev.entity);
> +#endif
> v4l2_device_unregister_subdev(&priv->subdev);
> clk_disable_unprepare(priv->clk);
> return 0;
--
Regards,
Sakari Ailus
e-mail: sakari.ailus@xxxxxx XMPP: sailus@xxxxxxxxxxxxxx
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