On Fri, Jan 27, 2023 at 06:50:03PM +0100, Jacopo Mondi wrote:
> On Fri, Jan 27, 2023 at 04:12:44PM +0100, Marcel Ziswiler wrote:
> > From: Aishwarya Kothari <aishwarya.kothari@xxxxxxxxxxx>
> >
> > Implement the introduced get_mbus_config operation to report the
> > number of used data lanes on the MIPI CSI-2 interface.
> >
>
> OV5640 can operate in parallel mode too.
>
> You can check how it currently configured with ov5640_is_csi2() and
> populate struct v4l2_mbus_config accordingly.
I'm also wondering which CSI-2 receiver needs .get_mbus_config() for the
ov5640. The number of lanes is usually specified in DT, on both sides of
the link. It's only when selecting a number of lanes dynamically at
runtime that .get_mbus_config() is needed.
> > Signed-off-by: Aishwarya Kothari <aishwarya.kothari@xxxxxxxxxxx>
> > Signed-off-by: Marcel Ziswiler <marcel.ziswiler@xxxxxxxxxxx>
> >
> > ---
> >
> > drivers/media/i2c/ov5640.c | 14 ++++++++++++++
> > 1 file changed, 14 insertions(+)
> >
> > diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
> > index e0f908af581b..42d43f0d1e1c 100644
> > --- a/drivers/media/i2c/ov5640.c
> > +++ b/drivers/media/i2c/ov5640.c
> > @@ -3733,6 +3733,19 @@ static int ov5640_init_cfg(struct v4l2_subdev *sd,
> > return 0;
> > }
> >
> > +static int ov5640_get_mbus_config(struct v4l2_subdev *sd,
> > + unsigned int pad,
> > + struct v4l2_mbus_config *cfg)
> > +{
> > + struct ov5640_dev *sensor = to_ov5640_dev(sd);
> > +
> > + cfg->type = V4L2_MBUS_CSI2_DPHY;
> > + cfg->bus.mipi_csi2.num_data_lanes = sensor->ep.bus.mipi_csi2.num_data_lanes;
> > + cfg->bus.mipi_csi2.flags = 0;
> > +
> > + return 0;
> > +}
> > +
> > static const struct v4l2_subdev_core_ops ov5640_core_ops = {
> > .log_status = v4l2_ctrl_subdev_log_status,
> > .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
> > @@ -3753,6 +3766,7 @@ static const struct v4l2_subdev_pad_ops ov5640_pad_ops = {
> > .get_selection = ov5640_get_selection,
> > .enum_frame_size = ov5640_enum_frame_size,
> > .enum_frame_interval = ov5640_enum_frame_interval,
> > + .get_mbus_config = ov5640_get_mbus_config,
> > };
> >
> > static const struct v4l2_subdev_ops ov5640_subdev_ops = {
--
Regards,
Laurent Pinchart
