Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 633 insertions, 0 deletions

diff --git a/drivers/media/platform/xilinx/xilinx-vipp.c b/drivers/media/platform/xilinx/xilinx-vipp.c
new file mode 100644
index 0000000000..996684a730
--- /dev/null
+++ b/drivers/media/platform/xilinx/xilinx-vipp.c
@@ -0,0 +1,633 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx Video IP Composite Device
+ *
+ * Copyright (C) 2013-2015 Ideas on Board
+ * Copyright (C) 2013-2015 Xilinx, Inc.
+ *
+ * Contacts: Hyun Kwon <hyun.kwon@xilinx.com>
+ *           Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <media/v4l2-async.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fwnode.h>
+
+#include "xilinx-dma.h"
+#include "xilinx-vipp.h"
+
+#define XVIPP_DMA_S2MM				0
+#define XVIPP_DMA_MM2S				1
+
+/**
+ * struct xvip_graph_entity - Entity in the video graph
+ * @asd: subdev asynchronous registration information
+ * @entity: media entity, from the corresponding V4L2 subdev
+ * @subdev: V4L2 subdev
+ */
+struct xvip_graph_entity {
+	struct v4l2_async_connection asd; /* must be first */
+	struct media_entity *entity;
+	struct v4l2_subdev *subdev;
+};
+
+static inline struct xvip_graph_entity *
+to_xvip_entity(struct v4l2_async_connection *asd)
+{
+	return container_of(asd, struct xvip_graph_entity, asd);
+}
+
+/* -----------------------------------------------------------------------------
+ * Graph Management
+ */
+
+static struct xvip_graph_entity *
+xvip_graph_find_entity(struct xvip_composite_device *xdev,
+		       const struct fwnode_handle *fwnode)
+{
+	struct xvip_graph_entity *entity;
+	struct v4l2_async_connection *asd;
+	struct list_head *lists[] = {
+		&xdev->notifier.done_list,
+		&xdev->notifier.waiting_list
+	};
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(lists); i++) {
+		list_for_each_entry(asd, lists[i], asc_entry) {
+			entity = to_xvip_entity(asd);
+			if (entity->asd.match.fwnode == fwnode)
+				return entity;
+		}
+	}
+
+	return NULL;
+}
+
+static int xvip_graph_build_one(struct xvip_composite_device *xdev,
+				struct xvip_graph_entity *entity)
+{
+	u32 link_flags = MEDIA_LNK_FL_ENABLED;
+	struct media_entity *local = entity->entity;
+	struct media_entity *remote;
+	struct media_pad *local_pad;
+	struct media_pad *remote_pad;
+	struct xvip_graph_entity *ent;
+	struct v4l2_fwnode_link link;
+	struct fwnode_handle *ep = NULL;
+	int ret = 0;
+
+	dev_dbg(xdev->dev, "creating links for entity %s\n", local->name);
+
+	while (1) {
+		/* Get the next endpoint and parse its link. */
+		ep = fwnode_graph_get_next_endpoint(entity->asd.match.fwnode,
+						    ep);
+		if (ep == NULL)
+			break;
+
+		dev_dbg(xdev->dev, "processing endpoint %p\n", ep);
+
+		ret = v4l2_fwnode_parse_link(ep, &link);
+		if (ret < 0) {
+			dev_err(xdev->dev, "failed to parse link for %p\n",
+				ep);
+			continue;
+		}
+
+		/* Skip sink ports, they will be processed from the other end of
+		 * the link.
+		 */
+		if (link.local_port >= local->num_pads) {
+			dev_err(xdev->dev, "invalid port number %u for %p\n",
+				link.local_port, link.local_node);
+			v4l2_fwnode_put_link(&link);
+			ret = -EINVAL;
+			break;
+		}
+
+		local_pad = &local->pads[link.local_port];
+
+		if (local_pad->flags & MEDIA_PAD_FL_SINK) {
+			dev_dbg(xdev->dev, "skipping sink port %p:%u\n",
+				link.local_node, link.local_port);
+			v4l2_fwnode_put_link(&link);
+			continue;
+		}
+
+		/* Skip DMA engines, they will be processed separately. */
+		if (link.remote_node == of_fwnode_handle(xdev->dev->of_node)) {
+			dev_dbg(xdev->dev, "skipping DMA port %p:%u\n",
+				link.local_node, link.local_port);
+			v4l2_fwnode_put_link(&link);
+			continue;
+		}
+
+		/* Find the remote entity. */
+		ent = xvip_graph_find_entity(xdev, link.remote_node);
+		if (ent == NULL) {
+			dev_err(xdev->dev, "no entity found for %p\n",
+				link.remote_node);
+			v4l2_fwnode_put_link(&link);
+			ret = -ENODEV;
+			break;
+		}
+
+		remote = ent->entity;
+
+		if (link.remote_port >= remote->num_pads) {
+			dev_err(xdev->dev, "invalid port number %u on %p\n",
+				link.remote_port, link.remote_node);
+			v4l2_fwnode_put_link(&link);
+			ret = -EINVAL;
+			break;
+		}
+
+		remote_pad = &remote->pads[link.remote_port];
+
+		v4l2_fwnode_put_link(&link);
+
+		/* Create the media link. */
+		dev_dbg(xdev->dev, "creating %s:%u -> %s:%u link\n",
+			local->name, local_pad->index,
+			remote->name, remote_pad->index);
+
+		ret = media_create_pad_link(local, local_pad->index,
+					       remote, remote_pad->index,
+					       link_flags);
+		if (ret < 0) {
+			dev_err(xdev->dev,
+				"failed to create %s:%u -> %s:%u link\n",
+				local->name, local_pad->index,
+				remote->name, remote_pad->index);
+			break;
+		}
+	}
+
+	fwnode_handle_put(ep);
+	return ret;
+}
+
+static struct xvip_dma *
+xvip_graph_find_dma(struct xvip_composite_device *xdev, unsigned int port)
+{
+	struct xvip_dma *dma;
+
+	list_for_each_entry(dma, &xdev->dmas, list) {
+		if (dma->port == port)
+			return dma;
+	}
+
+	return NULL;
+}
+
+static int xvip_graph_build_dma(struct xvip_composite_device *xdev)
+{
+	u32 link_flags = MEDIA_LNK_FL_ENABLED;
+	struct device_node *node = xdev->dev->of_node;
+	struct media_entity *source;
+	struct media_entity *sink;
+	struct media_pad *source_pad;
+	struct media_pad *sink_pad;
+	struct xvip_graph_entity *ent;
+	struct v4l2_fwnode_link link;
+	struct device_node *ep = NULL;
+	struct xvip_dma *dma;
+	int ret = 0;
+
+	dev_dbg(xdev->dev, "creating links for DMA engines\n");
+
+	while (1) {
+		/* Get the next endpoint and parse its link. */
+		ep = of_graph_get_next_endpoint(node, ep);
+		if (ep == NULL)
+			break;
+
+		dev_dbg(xdev->dev, "processing endpoint %pOF\n", ep);
+
+		ret = v4l2_fwnode_parse_link(of_fwnode_handle(ep), &link);
+		if (ret < 0) {
+			dev_err(xdev->dev, "failed to parse link for %pOF\n",
+				ep);
+			continue;
+		}
+
+		/* Find the DMA engine. */
+		dma = xvip_graph_find_dma(xdev, link.local_port);
+		if (dma == NULL) {
+			dev_err(xdev->dev, "no DMA engine found for port %u\n",
+				link.local_port);
+			v4l2_fwnode_put_link(&link);
+			ret = -EINVAL;
+			break;
+		}
+
+		dev_dbg(xdev->dev, "creating link for DMA engine %s\n",
+			dma->video.name);
+
+		/* Find the remote entity. */
+		ent = xvip_graph_find_entity(xdev, link.remote_node);
+		if (ent == NULL) {
+			dev_err(xdev->dev, "no entity found for %pOF\n",
+				to_of_node(link.remote_node));
+			v4l2_fwnode_put_link(&link);
+			ret = -ENODEV;
+			break;
+		}
+
+		if (link.remote_port >= ent->entity->num_pads) {
+			dev_err(xdev->dev, "invalid port number %u on %pOF\n",
+				link.remote_port,
+				to_of_node(link.remote_node));
+			v4l2_fwnode_put_link(&link);
+			ret = -EINVAL;
+			break;
+		}
+
+		if (dma->pad.flags & MEDIA_PAD_FL_SOURCE) {
+			source = &dma->video.entity;
+			source_pad = &dma->pad;
+			sink = ent->entity;
+			sink_pad = &sink->pads[link.remote_port];
+		} else {
+			source = ent->entity;
+			source_pad = &source->pads[link.remote_port];
+			sink = &dma->video.entity;
+			sink_pad = &dma->pad;
+		}
+
+		v4l2_fwnode_put_link(&link);
+
+		/* Create the media link. */
+		dev_dbg(xdev->dev, "creating %s:%u -> %s:%u link\n",
+			source->name, source_pad->index,
+			sink->name, sink_pad->index);
+
+		ret = media_create_pad_link(source, source_pad->index,
+					       sink, sink_pad->index,
+					       link_flags);
+		if (ret < 0) {
+			dev_err(xdev->dev,
+				"failed to create %s:%u -> %s:%u link\n",
+				source->name, source_pad->index,
+				sink->name, sink_pad->index);
+			break;
+		}
+	}
+
+	of_node_put(ep);
+	return ret;
+}
+
+static int xvip_graph_notify_complete(struct v4l2_async_notifier *notifier)
+{
+	struct xvip_composite_device *xdev =
+		container_of(notifier, struct xvip_composite_device, notifier);
+	struct xvip_graph_entity *entity;
+	struct v4l2_async_connection *asd;
+	int ret;
+
+	dev_dbg(xdev->dev, "notify complete, all subdevs registered\n");
+
+	/* Create links for every entity. */
+	list_for_each_entry(asd, &xdev->notifier.done_list, asc_entry) {
+		entity = to_xvip_entity(asd);
+		ret = xvip_graph_build_one(xdev, entity);
+		if (ret < 0)
+			return ret;
+	}
+
+	/* Create links for DMA channels. */
+	ret = xvip_graph_build_dma(xdev);
+	if (ret < 0)
+		return ret;
+
+	ret = v4l2_device_register_subdev_nodes(&xdev->v4l2_dev);
+	if (ret < 0)
+		dev_err(xdev->dev, "failed to register subdev nodes\n");
+
+	return media_device_register(&xdev->media_dev);
+}
+
+static int xvip_graph_notify_bound(struct v4l2_async_notifier *notifier,
+				   struct v4l2_subdev *subdev,
+				   struct v4l2_async_connection *asc)
+{
+	struct xvip_graph_entity *entity = to_xvip_entity(asc);
+
+	entity->entity = &subdev->entity;
+	entity->subdev = subdev;
+
+	return 0;
+}
+
+static const struct v4l2_async_notifier_operations xvip_graph_notify_ops = {
+	.bound = xvip_graph_notify_bound,
+	.complete = xvip_graph_notify_complete,
+};
+
+static int xvip_graph_parse_one(struct xvip_composite_device *xdev,
+				struct fwnode_handle *fwnode)
+{
+	struct fwnode_handle *remote;
+	struct fwnode_handle *ep = NULL;
+	int ret = 0;
+
+	dev_dbg(xdev->dev, "parsing node %p\n", fwnode);
+
+	while (1) {
+		struct xvip_graph_entity *xge;
+
+		ep = fwnode_graph_get_next_endpoint(fwnode, ep);
+		if (ep == NULL)
+			break;
+
+		dev_dbg(xdev->dev, "handling endpoint %p\n", ep);
+
+		remote = fwnode_graph_get_remote_port_parent(ep);
+		if (remote == NULL) {
+			ret = -EINVAL;
+			goto err_notifier_cleanup;
+		}
+
+		fwnode_handle_put(ep);
+
+		/* Skip entities that we have already processed. */
+		if (remote == of_fwnode_handle(xdev->dev->of_node) ||
+		    xvip_graph_find_entity(xdev, remote)) {
+			fwnode_handle_put(remote);
+			continue;
+		}
+
+		xge = v4l2_async_nf_add_fwnode(&xdev->notifier, remote,
+					       struct xvip_graph_entity);
+		fwnode_handle_put(remote);
+		if (IS_ERR(xge)) {
+			ret = PTR_ERR(xge);
+			goto err_notifier_cleanup;
+		}
+	}
+
+	return 0;
+
+err_notifier_cleanup:
+	v4l2_async_nf_cleanup(&xdev->notifier);
+	fwnode_handle_put(ep);
+	return ret;
+}
+
+static int xvip_graph_parse(struct xvip_composite_device *xdev)
+{
+	struct xvip_graph_entity *entity;
+	struct v4l2_async_connection *asd;
+	int ret;
+
+	/*
+	 * Walk the links to parse the full graph. Start by parsing the
+	 * composite node and then parse entities in turn. The list_for_each
+	 * loop will handle entities added at the end of the list while walking
+	 * the links.
+	 */
+	ret = xvip_graph_parse_one(xdev, of_fwnode_handle(xdev->dev->of_node));
+	if (ret < 0)
+		return 0;
+
+	list_for_each_entry(asd, &xdev->notifier.waiting_list, asc_entry) {
+		entity = to_xvip_entity(asd);
+		ret = xvip_graph_parse_one(xdev, entity->asd.match.fwnode);
+		if (ret < 0) {
+			v4l2_async_nf_cleanup(&xdev->notifier);
+			break;
+		}
+	}
+
+	return ret;
+}
+
+static int xvip_graph_dma_init_one(struct xvip_composite_device *xdev,
+				   struct device_node *node)
+{
+	struct xvip_dma *dma;
+	enum v4l2_buf_type type;
+	const char *direction;
+	unsigned int index;
+	int ret;
+
+	ret = of_property_read_string(node, "direction", &direction);
+	if (ret < 0)
+		return ret;
+
+	if (strcmp(direction, "input") == 0)
+		type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	else if (strcmp(direction, "output") == 0)
+		type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+	else
+		return -EINVAL;
+
+	of_property_read_u32(node, "reg", &index);
+
+	dma = devm_kzalloc(xdev->dev, sizeof(*dma), GFP_KERNEL);
+	if (dma == NULL)
+		return -ENOMEM;
+
+	ret = xvip_dma_init(xdev, dma, type, index);
+	if (ret < 0) {
+		dev_err(xdev->dev, "%pOF initialization failed\n", node);
+		return ret;
+	}
+
+	list_add_tail(&dma->list, &xdev->dmas);
+
+	xdev->v4l2_caps |= type == V4L2_BUF_TYPE_VIDEO_CAPTURE
+			 ? V4L2_CAP_VIDEO_CAPTURE : V4L2_CAP_VIDEO_OUTPUT;
+
+	return 0;
+}
+
+static int xvip_graph_dma_init(struct xvip_composite_device *xdev)
+{
+	struct device_node *ports;
+	struct device_node *port;
+	int ret = 0;
+
+	ports = of_get_child_by_name(xdev->dev->of_node, "ports");
+	if (ports == NULL) {
+		dev_err(xdev->dev, "ports node not present\n");
+		return -EINVAL;
+	}
+
+	for_each_child_of_node(ports, port) {
+		ret = xvip_graph_dma_init_one(xdev, port);
+		if (ret) {
+			of_node_put(port);
+			break;
+		}
+	}
+
+	of_node_put(ports);
+	return ret;
+}
+
+static void xvip_graph_cleanup(struct xvip_composite_device *xdev)
+{
+	struct xvip_dma *dmap;
+	struct xvip_dma *dma;
+
+	v4l2_async_nf_unregister(&xdev->notifier);
+	v4l2_async_nf_cleanup(&xdev->notifier);
+
+	list_for_each_entry_safe(dma, dmap, &xdev->dmas, list) {
+		xvip_dma_cleanup(dma);
+		list_del(&dma->list);
+	}
+}
+
+static int xvip_graph_init(struct xvip_composite_device *xdev)
+{
+	int ret;
+
+	/* Init the DMA channels. */
+	ret = xvip_graph_dma_init(xdev);
+	if (ret < 0) {
+		dev_err(xdev->dev, "DMA initialization failed\n");
+		goto done;
+	}
+
+	v4l2_async_nf_init(&xdev->notifier, &xdev->v4l2_dev);
+
+	/* Parse the graph to extract a list of subdevice DT nodes. */
+	ret = xvip_graph_parse(xdev);
+	if (ret < 0) {
+		dev_err(xdev->dev, "graph parsing failed\n");
+		goto done;
+	}
+
+	if (list_empty(&xdev->notifier.waiting_list)) {
+		dev_err(xdev->dev, "no subdev found in graph\n");
+		ret = -ENOENT;
+		goto done;
+	}
+
+	/* Register the subdevices notifier. */
+	xdev->notifier.ops = &xvip_graph_notify_ops;
+
+	ret = v4l2_async_nf_register(&xdev->notifier);
+	if (ret < 0) {
+		dev_err(xdev->dev, "notifier registration failed\n");
+		goto done;
+	}
+
+	ret = 0;
+
+done:
+	if (ret < 0)
+		xvip_graph_cleanup(xdev);
+
+	return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * Media Controller and V4L2
+ */
+
+static void xvip_composite_v4l2_cleanup(struct xvip_composite_device *xdev)
+{
+	v4l2_device_unregister(&xdev->v4l2_dev);
+	media_device_unregister(&xdev->media_dev);
+	media_device_cleanup(&xdev->media_dev);
+}
+
+static int xvip_composite_v4l2_init(struct xvip_composite_device *xdev)
+{
+	int ret;
+
+	xdev->media_dev.dev = xdev->dev;
+	strscpy(xdev->media_dev.model, "Xilinx Video Composite Device",
+		sizeof(xdev->media_dev.model));
+	xdev->media_dev.hw_revision = 0;
+
+	media_device_init(&xdev->media_dev);
+
+	xdev->v4l2_dev.mdev = &xdev->media_dev;
+	ret = v4l2_device_register(xdev->dev, &xdev->v4l2_dev);
+	if (ret < 0) {
+		dev_err(xdev->dev, "V4L2 device registration failed (%d)\n",
+			ret);
+		media_device_cleanup(&xdev->media_dev);
+		return ret;
+	}
+
+	return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * Platform Device Driver
+ */
+
+static int xvip_composite_probe(struct platform_device *pdev)
+{
+	struct xvip_composite_device *xdev;
+	int ret;
+
+	xdev = devm_kzalloc(&pdev->dev, sizeof(*xdev), GFP_KERNEL);
+	if (!xdev)
+		return -ENOMEM;
+
+	xdev->dev = &pdev->dev;
+	INIT_LIST_HEAD(&xdev->dmas);
+
+	ret = xvip_composite_v4l2_init(xdev);
+	if (ret < 0)
+		return ret;
+
+	ret = xvip_graph_init(xdev);
+	if (ret < 0)
+		goto error;
+
+	platform_set_drvdata(pdev, xdev);
+
+	dev_info(xdev->dev, "device registered\n");
+
+	return 0;
+
+error:
+	xvip_composite_v4l2_cleanup(xdev);
+	return ret;
+}
+
+static void xvip_composite_remove(struct platform_device *pdev)
+{
+	struct xvip_composite_device *xdev = platform_get_drvdata(pdev);
+
+	xvip_graph_cleanup(xdev);
+	xvip_composite_v4l2_cleanup(xdev);
+}
+
+static const struct of_device_id xvip_composite_of_id_table[] = {
+	{ .compatible = "xlnx,video" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, xvip_composite_of_id_table);
+
+static struct platform_driver xvip_composite_driver = {
+	.driver = {
+		.name = "xilinx-video",
+		.of_match_table = xvip_composite_of_id_table,
+	},
+	.probe = xvip_composite_probe,
+	.remove_new = xvip_composite_remove,
+};
+
+module_platform_driver(xvip_composite_driver);
+
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_DESCRIPTION("Xilinx Video IP Composite Driver");
+MODULE_LICENSE("GPL v2");