Re: [PATCH v3 4/4] rcar-vin: Always setup controls when opening video device

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Niklas,

Thank you for the patch.

On Thu, Jul 04, 2019 at 03:58:17AM +0200, Niklas Söderlund wrote:
> Now that both Gen2 (device centric) and Gen3 (media device centric)
> modes of this driver have controls it make sens to call

s/sens/sense/

> v4l2_ctrl_handler_setup() unconditionally when opening the video device.

Not only does it make sense, but it's required by 3/4. I think you
should explain why in the commit message. Apart from that,

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> ---
>  drivers/media/platform/rcar-vin/rcar-v4l2.c | 30 ++++++++++-----------
>  1 file changed, 15 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/media/platform/rcar-vin/rcar-v4l2.c b/drivers/media/platform/rcar-vin/rcar-v4l2.c
> index f8b6ec4408b2f5fa..cbf5d8cd6db32d77 100644
> --- a/drivers/media/platform/rcar-vin/rcar-v4l2.c
> +++ b/drivers/media/platform/rcar-vin/rcar-v4l2.c
> @@ -789,26 +789,26 @@ static int rvin_open(struct file *file)
>  	if (ret)
>  		goto err_unlock;
>  
> -	if (vin->info->use_mc) {
> +	if (vin->info->use_mc)
>  		ret = v4l2_pipeline_pm_use(&vin->vdev.entity, 1);
> -		if (ret < 0)
> -			goto err_open;
> -	} else {
> -		if (v4l2_fh_is_singular_file(file)) {
> -			ret = rvin_power_parallel(vin, true);
> -			if (ret < 0)
> -				goto err_open;
> +	else if (v4l2_fh_is_singular_file(file))
> +		ret = rvin_power_parallel(vin, true);
> +
> +	if (ret < 0)
> +		goto err_open;
> +
> +	ret = v4l2_ctrl_handler_setup(&vin->ctrl_handler);
> +	if (ret)
> +		goto err_power;
>  
> -			ret = v4l2_ctrl_handler_setup(&vin->ctrl_handler);
> -			if (ret)
> -				goto err_parallel;
> -		}
> -	}
>  	mutex_unlock(&vin->lock);
>  
>  	return 0;
> -err_parallel:
> -	rvin_power_parallel(vin, false);
> +err_power:
> +	if (vin->info->use_mc)
> +		v4l2_pipeline_pm_use(&vin->vdev.entity, 0);
> +	else if (v4l2_fh_is_singular_file(file))
> +		rvin_power_parallel(vin, false);
>  err_open:
>  	v4l2_fh_release(file);
>  err_unlock:

-- 
Regards,

Laurent Pinchart