media: v4l2-fwnode: link_frequency is an optional property (06f81520) · Commits · 戴 / test

v4l2_fwnode_endpoint_alloc_parse() is intended as a replacement for v4l2_fwnode_endpoint_parse(). It parses the "link-frequency" property and if the property isn't found, it returns an error. However, "link-frequency" is an optional property and if it does not exist is not an error. Instead, the number of link frequencies is simply zero in that case. Signed-off-by:

Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by:

Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Signed-off-by:

Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/v4l2-core/v4l2-fwnode.c

+15 −15

Original line number	Diff line number	Diff line
		@@ -291,11 +291,10 @@ struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse(

		rval = fwnode_property_read_u64_array(fwnode, "link-frequencies",
		NULL, 0);
		if (rval < 0)
		goto out_err;

		if (rval > 0) {
		vep->link_frequencies =
		kmalloc_array(rval, sizeof(*vep->link_frequencies), GFP_KERNEL);
		kmalloc_array(rval, sizeof(*vep->link_frequencies),
		GFP_KERNEL);
		if (!vep->link_frequencies) {
		rval = -ENOMEM;
		goto out_err;
		@@ -303,11 +302,12 @@ struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse(

		vep->nr_of_link_frequencies = rval;

		rval = fwnode_property_read_u64_array(fwnode, "link-frequencies",
		vep->link_frequencies,
		rval = fwnode_property_read_u64_array(
		fwnode, "link-frequencies", vep->link_frequencies,
		vep->nr_of_link_frequencies);
		if (rval < 0)
		goto out_err;
		}

		return vep;

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