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

[Laurent Pinchart]

On Sun, Jun 19, 2022 at 02:28:55AM +0200, Marek Vasut wrote:
> 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.

Doesn't the dcmi driver expose the sensor controls on the video node ?

-- 
Regards,

Laurent Pinchart