linux-kernel - Re: [PATCH] media: imx-csi: Input connections to CSI should be optional

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Date:   Thu, 10 Jan 2019 11:54:49 +0100
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Steve Longerbeam <slongerbeam@...il.com>,
        linux-media@...r.kernel.org
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "open list:STAGING SUBSYSTEM" <devel@...verdev.osuosl.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] media: imx-csi: Input connections to CSI should be
 optional

On Wed, 2019-01-09 at 10:34 -0800, Steve Longerbeam wrote:
> Some imx platforms do not have fwnode connections to all CSI input
> ports, and should not be treated as an error. This includes the
> imx6q SabreAuto, which has no connections to ipu1_csi1 and ipu2_csi0.
> Return -ENOTCONN in imx_csi_parse_endpoint() so that v4l2-fwnode
> endpoint parsing will not treat an unconnected CSI input port as
> an error.
> 
> Fixes: c893500a16baf ("media: imx: csi: Register a subdev notifier")
> 
> Signed-off-by: Steve Longerbeam <slongerbeam@...il.com>

Reviewed-by: Philipp Zabel <p.zabel@...gutronix.de>

regards
Philipp

> ---
>  drivers/staging/media/imx/imx-media-csi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.c
> index 4223f8d418ae..30b1717982ae 100644
> --- a/drivers/staging/media/imx/imx-media-csi.c
> +++ b/drivers/staging/media/imx/imx-media-csi.c
> @@ -1787,7 +1787,7 @@ static int imx_csi_parse_endpoint(struct device *dev,
>  				  struct v4l2_fwnode_endpoint *vep,
>  				  struct v4l2_async_subdev *asd)
>  {
> -	return fwnode_device_is_available(asd->match.fwnode) ? 0 : -EINVAL;
> +	return fwnode_device_is_available(asd->match.fwnode) ? 0 : -ENOTCONN;
>  }
>  
>  static int imx_csi_async_register(struct csi_priv *priv)