Hi,
On Tue, May 29, 2018 at 10:48:04AM +0200, Jacopo Mondi wrote:
> The rcar-vin driver so far had a mutually exclusive code path for
> handling parallel and CSI-2 video input subdevices, with only the CSI-2
> use case supporting media-controller. As we add support for parallel
> inputs to Gen3 media-controller compliant code path now parse both port@0
> and port@1, handling the media-controller use case in the parallel
> bound/unbind notifier operations.
>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
>
> ---
> v4 -> v5:
> - Re-group rvin_mc_init() function
> - Add error_group_unreg error path to clean up group registration
> - Change rvin_parallel_init() return type to make sure Gen2 works as before
>
> v3 -> v4:
> - Change the mc/parallel initialization order. Initialize mc first, then
> parallel
> - As a consequence no need to delay parallel notifiers registration, the
> media controller is set up already when parallel input got parsed,
> this greatly simplify the group notifier complete callback.
>
> ---
> drivers/media/platform/rcar-vin/rcar-core.c | 53 +++++++++++++++++++++--------
> 1 file changed, 38 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/media/platform/rcar-vin/rcar-core.c b/drivers/media/platform/rcar-vin/rcar-core.c
> index fc98986..c1d6feb 100644
> --- a/drivers/media/platform/rcar-vin/rcar-core.c
> +++ b/drivers/media/platform/rcar-vin/rcar-core.c
> @@ -399,6 +399,11 @@ static int rvin_parallel_subdevice_attach(struct rvin_dev *vin,
> ret = rvin_find_pad(subdev, MEDIA_PAD_FL_SINK);
> vin->parallel->sink_pad = ret < 0 ? 0 : ret;
>
> + if (vin->info->use_mc) {
> + vin->parallel->subdev = subdev;
> + return 0;
> + }
> +
> /* Find compatible subdevices mbus format */
> vin->mbus_code = 0;
> code.index = 0;
> @@ -460,10 +465,12 @@ static int rvin_parallel_subdevice_attach(struct rvin_dev *vin,
> static void rvin_parallel_subdevice_detach(struct rvin_dev *vin)
> {
> rvin_v4l2_unregister(vin);
> - v4l2_ctrl_handler_free(&vin->ctrl_handler);
> -
> - vin->vdev.ctrl_handler = NULL;
> vin->parallel->subdev = NULL;
> +
> + if (!vin->info->use_mc) {
> + v4l2_ctrl_handler_free(&vin->ctrl_handler);
> + vin->vdev.ctrl_handler = NULL;
> + }
> }
>
> static int rvin_parallel_notify_complete(struct v4l2_async_notifier *notifier)
> @@ -552,18 +559,19 @@ static int rvin_parallel_parse_v4l2(struct device *dev,
> return 0;
> }
>
> -static int rvin_parallel_graph_init(struct rvin_dev *vin)
> +static int rvin_parallel_init(struct rvin_dev *vin)
> {
> int ret;
>
> - ret = v4l2_async_notifier_parse_fwnode_endpoints(
> - vin->dev, &vin->notifier,
> - sizeof(struct rvin_parallel_entity), rvin_parallel_parse_v4l2);
> + ret = v4l2_async_notifier_parse_fwnode_endpoints_by_port(
> + vin->dev, &vin->notifier, sizeof(struct rvin_parallel_entity),
> + 0, rvin_parallel_parse_v4l2);
> if (ret)
> return ret;
>
> + /* If using mc, it's fine not to have any input registered. */
> if (!vin->parallel)
> - return -ENODEV;
> + return vin->info->use_mc ? 0 : -ENODEV;
>
> vin_dbg(vin, "Found parallel subdevice %pOF\n",
> to_of_node(vin->parallel->asd.match.fwnode));
> @@ -1084,20 +1092,35 @@ static int rcar_vin_probe(struct platform_device *pdev)
> return ret;
>
> platform_set_drvdata(pdev, vin);
> - if (vin->info->use_mc)
> +
> + if (vin->info->use_mc) {
> ret = rvin_mc_init(vin);
> - else
> - ret = rvin_parallel_graph_init(vin);
> - if (ret < 0)
> - goto error;
> + if (ret)
> + goto error_dma_unregister;
> + }
> +
> + ret = rvin_parallel_init(vin);
> + if (ret)
> + goto error_group_unregister;
>
> pm_suspend_ignore_children(&pdev->dev, true);
> pm_runtime_enable(&pdev->dev);
>
> return 0;
> -error:
> +
> +error_group_unreg:
I just noticed I forgot to add a change before formatting out patches.
This label name is wrong.
I'll wait for other comments, and will send v6 with this fixed. Sorry
about that.
Thanks
j
> + if (vin->info->use_mc) {
> + mutex_lock(&vin->group->lock);
> + if (&vin->v4l2_dev == vin->group->notifier.v4l2_dev) {
> + v4l2_async_notifier_unregister(&vin->group->notifier);
> + v4l2_async_notifier_cleanup(&vin->group->notifier);
> + }
> + mutex_unlock(&vin->group->lock);
> + rvin_group_put(vin);
> + }
> +
> +error_dma_unreg:
> rvin_dma_unregister(vin);
> - v4l2_async_notifier_cleanup(&vin->notifier);
>
> return ret;
> }
> --
> 2.7.4
>
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