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// SPDX-License-Identifier: GPL-2.0+
/*
* Media driver for Freescale i.MX5/6 SOC
*
* Open Firmware parsing.
*
* Copyright (c) 2016 Mentor Graphics Inc.
*/
#include <linux/of_platform.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>
#include <media/videobuf2-dma-contig.h>
#include <linux/of_graph.h>
#include <video/imx-ipu-v3.h>
#include "imx-media.h"
static int imx_media_of_add_csi(struct imx_media_dev *imxmd,
struct device_node *csi_np)
{
struct v4l2_async_subdev *asd;
int ret = 0;
if (!of_device_is_available(csi_np)) {
dev_dbg(imxmd->md.dev, "%s: %pOFn not enabled\n", __func__,
csi_np);
return -ENODEV;
}
/* add CSI fwnode to async notifier */
asd = v4l2_async_nf_add_fwnode(&imxmd->notifier,
of_fwnode_handle(csi_np),
struct v4l2_async_subdev);
if (IS_ERR(asd)) {
ret = PTR_ERR(asd);
if (ret == -EEXIST)
dev_dbg(imxmd->md.dev, "%s: already added %pOFn\n",
__func__, csi_np);
}
return ret;
}
int imx_media_add_of_subdevs(struct imx_media_dev *imxmd,
struct device_node *np)
{
struct device_node *csi_np;
int i, ret;
for (i = 0; ; i++) {
csi_np = of_parse_phandle(np, "ports", i);
if (!csi_np)
break;
ret = imx_media_of_add_csi(imxmd, csi_np);
if (ret) {
/* unavailable or already added is not an error */
if (ret == -ENODEV || ret == -EEXIST) {
of_node_put(csi_np);
continue;
}
/* other error, can't continue */
goto err_out;
}
}
return 0;
err_out:
of_node_put(csi_np);
return ret;
}
EXPORT_SYMBOL_GPL(imx_media_add_of_subdevs);
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