Hi Jacopo,
On Wed, Jun 24, 2020 at 09:53:07AM +0200, Jacopo Mondi wrote:
> On Tue, Jun 16, 2020 at 12:00:15PM +0200, Ramzi BEN MEFTAH wrote:
> > From: Steve Longerbeam <steve_longerbeam@xxxxxxxxxx>
>
> +Niklas, +Laurent
>
> Niklas, Laurent, how does this play with CAP_IO_MC ?
I don't think it's related to CAP_IO_MC, but I don't think it's a good
idea either :-) Routing doesn't go through the subdev [gs]_input
operations in MC-based drivers. It should be configured through link
setup instead. This patch goes in the wrong direction, sorry Steve.
> > This commit enables VIDIOC_ENUMINPUT, VIDIOC_G_INPUT, and VIDIOC_S_INPUT
> > ioctls for use via v4l2 subdevice node.
> >
> > This commit should probably not be pushed upstream, because the (old)
> > idea of video inputs conflicts with the newer concept of establishing
> > media links between src->sink pads.
> >
> > However it might make sense for some subdevices to support enum/get/set
> > inputs. One example would be the analog front end subdevice for the
> > ADV748x. By providing these ioctls, selecting the ADV748x analog inputs
> > can be done without requiring the implementation of media entities that
> > would define the analog source for which to establish a media link.
> >
> > Signed-off-by: Steve Longerbeam <steve_longerbeam@xxxxxxxxxx>
> > ---
> > drivers/media/v4l2-core/v4l2-subdev.c | 9 +++++++++
> > include/media/v4l2-subdev.h | 11 +++++++++++
> > 2 files changed, 20 insertions(+)
> >
> > diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
> > index 6b989fe..73fbfe9 100644
> > --- a/drivers/media/v4l2-core/v4l2-subdev.c
> > +++ b/drivers/media/v4l2-core/v4l2-subdev.c
> > @@ -378,6 +378,15 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
> > return -ENOTTY;
> > return v4l2_querymenu(vfh->ctrl_handler, arg);
> >
> > + case VIDIOC_ENUMINPUT:
> > + return v4l2_subdev_call(sd, video, enuminput, arg);
> > +
> > + case VIDIOC_G_INPUT:
> > + return v4l2_subdev_call(sd, video, g_input, arg);
> > +
> > + case VIDIOC_S_INPUT:
> > + return v4l2_subdev_call(sd, video, s_input, *(u32 *)arg);
> > +
> > case VIDIOC_G_CTRL:
> > if (!vfh->ctrl_handler)
> > return -ENOTTY;
> > diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
> > index f7fe78a..6e1a9cd 100644
> > --- a/include/media/v4l2-subdev.h
> > +++ b/include/media/v4l2-subdev.h
> > @@ -383,6 +383,14 @@ struct v4l2_mbus_frame_desc {
> > * @g_input_status: get input status. Same as the status field in the
> > * &struct &v4l2_input
> > *
> > + * @enuminput: enumerate inputs. Should return the same input status as
> > + * @g_input_status if the passed input index is the currently active
> > + * input.
> > + *
> > + * @g_input: returns the currently active input index.
> > + *
> > + * @s_input: set the active input.
> > + *
> > * @s_stream: used to notify the driver that a video stream will start or has
> > * stopped.
> > *
> > @@ -423,6 +431,9 @@ struct v4l2_subdev_video_ops {
> > int (*g_tvnorms)(struct v4l2_subdev *sd, v4l2_std_id *std);
> > int (*g_tvnorms_output)(struct v4l2_subdev *sd, v4l2_std_id *std);
> > int (*g_input_status)(struct v4l2_subdev *sd, u32 *status);
> > + int (*enuminput)(struct v4l2_subdev *sd, struct v4l2_input *input);
> > + int (*g_input)(struct v4l2_subdev *sd, u32 *index);
> > + int (*s_input)(struct v4l2_subdev *sd, u32 index);
> > int (*s_stream)(struct v4l2_subdev *sd, int enable);
> > int (*g_pixelaspect)(struct v4l2_subdev *sd, struct v4l2_fract *aspect);
> > int (*g_frame_interval)(struct v4l2_subdev *sd,
--
Regards,
Laurent Pinchart
