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SubjectRE: [PATCH] media: v4l2-fwnode: Return -EINVAL for invalid bus-type
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Hi Prabhakar,

Thanks for the patch.

> Subject: [PATCH] media: v4l2-fwnode: Return -EINVAL for invalid bus-type
>
> With the current implementation if invalid bus-type is passed via DT
> v4l2_fwnode_endpoint_parse() defaulted the mus-type to

Typo mus-type??

> V4L2_MBUS_PARALLEL instead of returning error.
>
> This Patch adds V4L2_MBUS_INVALID entry to v4l2_mbus_type enum and

This patch ??

> when invalid bus-type is detected in v4l2_fwnode_endpoint_parse() it
> returns -EINVAL to the caller.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
> drivers/media/v4l2-core/v4l2-fwnode.c | 6 +++++-
> include/media/v4l2-mediabus.h | 2 ++
> 2 files changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-
> core/v4l2-fwnode.c
> index a4c3c77c1894..a6f3549eadd3 100644
> --- a/drivers/media/v4l2-core/v4l2-fwnode.c
> +++ b/drivers/media/v4l2-core/v4l2-fwnode.c
> @@ -93,7 +93,7 @@ v4l2_fwnode_bus_type_to_mbus(enum
> v4l2_fwnode_bus_type type)
> const struct v4l2_fwnode_bus_conv *conv =
> get_v4l2_fwnode_bus_conv_by_fwnode_bus(type);
>
> -return conv ? conv->mbus_type : V4L2_MBUS_UNKNOWN;
> +return conv ? conv->mbus_type : V4L2_MBUS_INVALID;
> }
>
> static const char *
> @@ -436,6 +436,10 @@ static int __v4l2_fwnode_endpoint_parse(struct
> fwnode_handle *fwnode,
> v4l2_fwnode_mbus_type_to_string(vep->bus_type),
> vep->bus_type);
> mbus_type = v4l2_fwnode_bus_type_to_mbus(bus_type);
> +if (mbus_type == V4L2_MBUS_INVALID) {
> +pr_debug("unsupported bus type %u\n", bus_type);
> +return -EINVAL;
> +}
>
> if (vep->bus_type != V4L2_MBUS_UNKNOWN) {
> if (mbus_type != V4L2_MBUS_UNKNOWN && diff --git
> a/include/media/v4l2-mediabus.h b/include/media/v4l2-mediabus.h index
> 45f88f0248c4..b4f630783cb7 100644
> --- a/include/media/v4l2-mediabus.h
> +++ b/include/media/v4l2-mediabus.h
> @@ -78,6 +78,7 @@
> * @V4L2_MBUS_CCP2:CCP2 (Compact Camera Port 2)
> * @V4L2_MBUS_CSI2_DPHY: MIPI CSI-2 serial interface, with D-PHY
> * @V4L2_MBUS_CSI2_CPHY: MIPI CSI-2 serial interface, with C-PHY
> + * @V4L2_MBUS_INVALID:invalid bus type (keep it last for sanity)
> */
> enum v4l2_mbus_type {
> V4L2_MBUS_UNKNOWN,
> @@ -87,6 +88,7 @@ enum v4l2_mbus_type {
> V4L2_MBUS_CCP2,
> V4L2_MBUS_CSI2_DPHY,
> V4L2_MBUS_CSI2_CPHY,
> +V4L2_MBUS_INVALID,
> };
>
> /**
> --
> 2.17.1



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