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Message-ID: <1547032417.4160.2.camel@pengutronix.de>
Subject: Re: [PATCH v6 05/12] media: imx-csi: Input connections to CSI
 should be optional
From:   Philipp Zabel <p.zabel@pengutronix.de>
To:     Steve Longerbeam <slongerbeam@gmail.com>,
        linux-media@vger.kernel.org
Cc:     Mauro Carvalho Chehab <mchehab@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "open list:STAGING SUBSYSTEM" <devel@driverdev.osuosl.org>,
        open list <linux-kernel@vger.kernel.org>
Date:   Wed, 09 Jan 2019 12:13:37 +0100
In-Reply-To: <20190109001551.16113-6-slongerbeam@gmail.com>
References: <20190109001551.16113-1-slongerbeam@gmail.com>
         <20190109001551.16113-6-slongerbeam@gmail.com>
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On Tue, 2019-01-08 at 16:15 -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 endpoint as an error.
> 
> Fixes: c893500a16baf ("media: imx: csi: Register a subdev notifier")
> 
> Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
> ---
>  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 e3a4f39dbf73..b276672cae1d 100644
> --- a/drivers/staging/media/imx/imx-media-csi.c
> +++ b/drivers/staging/media/imx/imx-media-csi.c
> @@ -1815,7 +1815,7 @@ 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)

Is this something that should be applied as a fix, separately from this
series?

regards
Philipp