[PATCH] media: stm32: dcmi: Register V4L2 subdev nodes

[Marek Vasut]

On 6/19/22 01:20, Laurent Pinchart wrote:
> Hi Marek,
> 
> Thank you for the patch.
> 
> On Sun, Jun 19, 2022 at 12:23:35AM +0200, Marek Vasut wrote:
>> Unless the V4L2 device calls v4l2_device_register_subdev_nodes(),
>> the /dev/v4l-subdev* sub-device nodes are not registered and thus
>> not created. Add the missing call.
> 
> This driver configures the subdevs internally. Exposing the subdev nodes
> to userspace would conflict with driver operation.
> 
> If you need the subdev nodes only to query subdev information, you can
> use v4l2_device_register_ro_subdev_nodes(). Ideally I'd prefer this
> driver to expose subdev nodes to userspace and stop propagating formats
> internally, but that may break applications :-(

I need those subdevs to configure e.g. test pattern on the sensor side.