linux-kernel - Re: [PATCH v8 19/34] media: Add i.MX media core driver

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Date:   Fri, 09 Jun 2017 15:15:35 +0200
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Steve Longerbeam <slongerbeam@...il.com>
Cc:     robh+dt@...nel.org, mark.rutland@....com, shawnguo@...nel.org,
        kernel@...gutronix.de, fabio.estevam@....com,
        linux@...linux.org.uk, mchehab@...nel.org, hverkuil@...all.nl,
        nick@...anahar.org, markus.heiser@...marIT.de,
        laurent.pinchart+renesas@...asonboard.com, bparrot@...com,
        geert@...ux-m68k.org, arnd@...db.de, sudipm.mukherjee@...il.com,
        minghsiu.tsai@...iatek.com, tiffany.lin@...iatek.com,
        jean-christophe.trotin@...com, horms+renesas@...ge.net.au,
        niklas.soderlund+renesas@...natech.se, robert.jarzmik@...e.fr,
        songjun.wu@...rochip.com, andrew-ct.chen@...iatek.com,
        gregkh@...uxfoundation.org, shuah@...nel.org,
        sakari.ailus@...ux.intel.com, pavel@....cz,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
        devel@...verdev.osuosl.org,
        Steve Longerbeam <steve_longerbeam@...tor.com>,
        Russell King <rmk+kernel@...linux.org.uk>
Subject: Re: [PATCH v8 19/34] media: Add i.MX media core driver

On Wed, 2017-06-07 at 11:33 -0700, Steve Longerbeam wrote:
> Add the core media driver for i.MX SOC.
> 
> Signed-off-by: Steve Longerbeam <steve_longerbeam@...tor.com>
> 
> Switch from the v4l2_of_ APIs to the v4l2_fwnode_ APIs.
> 
> Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de>
> 
> Add the bayer formats to imx-media's list of supported pixel and bus
> formats.
> 
> Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>
> ---
[...]
> diff --git a/drivers/staging/media/imx/imx-media-dev.c b/drivers/staging/media/imx/imx-media-dev.c
> new file mode 100644
> index 0000000..da694f6
> --- /dev/null
> +++ b/drivers/staging/media/imx/imx-media-dev.c
> @@ -0,0 +1,666 @@
[...]
> +/*
> + * adds given video device to given imx-media source pad vdev list.
> + * Continues upstream from the pad entity's sink pads.
> + */
> +static int imx_media_add_vdev_to_pad(struct imx_media_dev *imxmd,
> +				     struct imx_media_video_dev *vdev,
> +				     struct media_pad *srcpad)
> +{
> +	struct media_entity *entity = srcpad->entity;
> +	struct imx_media_subdev *imxsd;
> +	struct imx_media_pad *imxpad;
> +	struct media_link *link;
> +	struct v4l2_subdev *sd;
> +	int i, vdev_idx, ret;
> +
> +	if (!is_media_entity_v4l2_subdev(entity))
> +		return -EINVAL;

Could we make this return 0, to just skip non-v4l2_subdev entities?
Currently, imx_media_probe_complete silently fails with this -EINVAL if
there is a tvp5150 connected due to the separate media entities that the
tvp5150 driver creates for the input connectors (Composite0, for
example).

regards
Philipp