Hi Jacopo,
Thanks for your patch,
On 2018-05-16 14:16:55 +0200, Jacopo Mondi wrote:
> Handle digital subdevices in link_notify callback. If the notified link
> involves a digital subdevice, do not change routing of the VIN-CSI-2
> devices.
>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
> ---
> drivers/media/platform/rcar-vin/rcar-core.c | 30 +++++++++++++++++++++++++++--
> 1 file changed, 28 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/platform/rcar-vin/rcar-core.c b/drivers/media/platform/rcar-vin/rcar-core.c
> index 1003c8c..ea74c55 100644
> --- a/drivers/media/platform/rcar-vin/rcar-core.c
> +++ b/drivers/media/platform/rcar-vin/rcar-core.c
> @@ -168,10 +168,36 @@ static int rvin_group_link_notify(struct media_link *link, u32 flags,
> }
>
> /* Add the new link to the existing mask and check if it works. */
> - csi_id = rvin_group_entity_to_csi_id(group, link->source->entity);
> channel = rvin_group_csi_pad_to_channel(link->source->index);
> - mask_new = mask & rvin_group_get_mask(vin, csi_id, channel);
> + csi_id = rvin_group_entity_to_csi_id(group, link->source->entity);
> + if (csi_id == -ENODEV) {
> + struct v4l2_subdev *sd;
> + unsigned int i;
> +
> + /*
> + * Make sure the source entity subdevice is registered as
> + * a digital input of one of the enabled VINs if it is not
> + * one of the CSI-2 subdevices.
> + *
> + * No hardware configuration required for digital inputs,
> + * we can return here.
> + */
> + sd = media_entity_to_v4l2_subdev(link->source->entity);
> + for (i = 0; i < RCAR_VIN_NUM; i++) {
> + if (group->vin[i] && group->vin[i]->digital &&
> + group->vin[i]->digital->subdev == sd) {
> + ret = 0;
> + goto out;
> + }
> + }
> +
> + vin_err(vin, "Subdevice %s not registered to any VIN\n",
> + link->source->entity->name);
> + ret = -ENODEV;
> + goto out;
> + }
I like this patch, you made it so simple. I feared this would be the
ugly part when adding parallel support to Gen3. All that is missing is
handling of vin->mbus_cfg or how you think we best handle that for the
different input buses.
>
> + mask_new = mask & rvin_group_get_mask(vin, csi_id, channel);
> vin_dbg(vin, "Try link change mask: 0x%x new: 0x%x\n", mask, mask_new);
>
> if (!mask_new) {
> --
> 2.7.4
>
--
Regards,
Niklas Söderlund
