[PATCH 1/5] v4l: async: Use endpoint node, not device node, for fwnode match

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From: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>

V4L2 async framework can use both device's fwnode and endpoints's fwnode
for matching the async sub-device with the sub-device. In order to proceed
moving towards endpoint matching assign the endpoint to the async
sub-device.

As most async sub-device drivers (and the related hardware) only supports
a single endpoint, use the first endpoint found. This works for all
current drivers --- we only ever supported a single async sub-device per
device to begin with.

For async devices that have no endpoints, continue to use the fwnode
related to the device. This includes e.g. lens devices.

Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
 drivers/media/platform/am437x/am437x-vpfe.c    |  2 +-
 drivers/media/platform/atmel/atmel-isc.c       |  2 +-
 drivers/media/platform/atmel/atmel-isi.c       |  2 +-
 drivers/media/platform/davinci/vpif_capture.c  |  2 +-
 drivers/media/platform/exynos4-is/media-dev.c  | 14 ++++++++++----
 drivers/media/platform/pxa_camera.c            |  2 +-
 drivers/media/platform/qcom/camss-8x16/camss.c |  2 +-
 drivers/media/platform/rcar_drif.c             |  2 +-
 drivers/media/platform/stm32/stm32-dcmi.c      |  2 +-
 drivers/media/platform/ti-vpe/cal.c            |  2 +-
 drivers/media/platform/xilinx/xilinx-vipp.c    | 16 +++++++++++++---
 drivers/media/v4l2-core/v4l2-async.c           |  8 ++++++--
 drivers/media/v4l2-core/v4l2-fwnode.c          |  2 +-
 13 files changed, 39 insertions(+), 19 deletions(-)

diff --git a/drivers/media/platform/am437x/am437x-vpfe.c b/drivers/media/platform/am437x/am437x-vpfe.c
index 0997c64..892d9e9 100644
--- a/drivers/media/platform/am437x/am437x-vpfe.c
+++ b/drivers/media/platform/am437x/am437x-vpfe.c
@@ -2493,7 +2493,7 @@ vpfe_get_pdata(struct platform_device *pdev)
 		if (flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
 			sdinfo->vpfe_param.vdpol = 1;
 
-		rem = of_graph_get_remote_port_parent(endpoint);
+		rem = of_graph_get_remote_endpoint(endpoint);
 		if (!rem) {
 			dev_err(&pdev->dev, "Remote device at %pOF not found\n",
 				endpoint);
diff --git a/drivers/media/platform/atmel/atmel-isc.c b/drivers/media/platform/atmel/atmel-isc.c
index 13f1c1c..c8bb60e 100644
--- a/drivers/media/platform/atmel/atmel-isc.c
+++ b/drivers/media/platform/atmel/atmel-isc.c
@@ -2044,7 +2044,7 @@ static int isc_parse_dt(struct device *dev, struct isc_device *isc)
 		if (!epn)
 			break;
 
-		rem = of_graph_get_remote_port_parent(epn);
+		rem = of_graph_get_remote_endpoint(epn);
 		if (!rem) {
 			dev_notice(dev, "Remote device at %pOF not found\n",
 				   epn);
diff --git a/drivers/media/platform/atmel/atmel-isi.c b/drivers/media/platform/atmel/atmel-isi.c
index e900995..eafdf91 100644
--- a/drivers/media/platform/atmel/atmel-isi.c
+++ b/drivers/media/platform/atmel/atmel-isi.c
@@ -1119,7 +1119,7 @@ static int isi_graph_parse(struct atmel_isi *isi, struct device_node *node)
 		if (!ep)
 			return -EINVAL;
 
-		remote = of_graph_get_remote_port_parent(ep);
+		remote = of_graph_get_remote_endpoint(ep);
 		if (!remote) {
 			of_node_put(ep);
 			return -EINVAL;
diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c
index a89367a..e150d75 100644
--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -1572,7 +1572,7 @@ vpif_capture_get_pdata(struct platform_device *pdev)
 		if (flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
 			chan->vpif_if.vd_pol = 1;
 
-		rem = of_graph_get_remote_port_parent(endpoint);
+		rem = of_graph_get_remote_endpoint(endpoint);
 		if (!rem) {
 			dev_dbg(&pdev->dev, "Remote device at %pOF not found\n",
 				endpoint);
diff --git a/drivers/media/platform/exynos4-is/media-dev.c b/drivers/media/platform/exynos4-is/media-dev.c
index c15596b..c6b0220 100644
--- a/drivers/media/platform/exynos4-is/media-dev.c
+++ b/drivers/media/platform/exynos4-is/media-dev.c
@@ -409,7 +409,7 @@ static int fimc_md_parse_port_node(struct fimc_md *fmd,
 
 	pd->mux_id = (endpoint.base.port - 1) & 0x1;
 
-	rem = of_graph_get_remote_port_parent(ep);
+	rem = of_graph_get_remote_endpoint(ep);
 	of_node_put(ep);
 	if (rem == NULL) {
 		v4l2_info(&fmd->v4l2_dev, "Remote device at %pOF not found\n",
@@ -1360,11 +1360,17 @@ static int subdev_notifier_bound(struct v4l2_async_notifier *notifier,
 	int i;
 
 	/* Find platform data for this sensor subdev */
-	for (i = 0; i < ARRAY_SIZE(fmd->sensor); i++)
-		if (fmd->sensor[i].asd.match.fwnode.fwnode ==
-		    of_fwnode_handle(subdev->dev->of_node))
+	for (i = 0; i < ARRAY_SIZE(fmd->sensor); i++) {
+		struct fwnode_handle *fwnode =
+			fwnode_graph_get_port_parent(
+				of_fwnode_handle(subdev->dev->of_node));
+
+		if (fmd->sensor[i].asd.match.fwnode.fwnode == fwnode)
 			si = &fmd->sensor[i];
 
+		fwnode_handle_put(fwnode);
+	}
+
 	if (si == NULL)
 		return -EINVAL;
 
diff --git a/drivers/media/platform/pxa_camera.c b/drivers/media/platform/pxa_camera.c
index 9d3f0cb..33d7ef8 100644
--- a/drivers/media/platform/pxa_camera.c
+++ b/drivers/media/platform/pxa_camera.c
@@ -2331,7 +2331,7 @@ static int pxa_camera_pdata_from_dt(struct device *dev,
 		pcdev->platform_flags |= PXA_CAMERA_PCLK_EN;
 
 	asd->match_type = V4L2_ASYNC_MATCH_FWNODE;
-	remote = of_graph_get_remote_port(np);
+	remote = of_graph_get_remote_endpoint(np);
 	if (remote) {
 		asd->match.fwnode.fwnode = of_fwnode_handle(remote);
 		of_node_put(remote);
diff --git a/drivers/media/platform/qcom/camss-8x16/camss.c b/drivers/media/platform/qcom/camss-8x16/camss.c
index 390a42c..73cac63 100644
--- a/drivers/media/platform/qcom/camss-8x16/camss.c
+++ b/drivers/media/platform/qcom/camss-8x16/camss.c
@@ -332,7 +332,7 @@ static int camss_of_parse_ports(struct device *dev,
 			return ret;
 		}
 
-		remote = of_graph_get_remote_port_parent(node);
+		remote = of_graph_get_remote_endpoint(node);
 		of_node_put(node);
 
 		if (!remote) {
diff --git a/drivers/media/platform/rcar_drif.c b/drivers/media/platform/rcar_drif.c
index 63c94f4..f6e0a08 100644
--- a/drivers/media/platform/rcar_drif.c
+++ b/drivers/media/platform/rcar_drif.c
@@ -1228,7 +1228,7 @@ static int rcar_drif_parse_subdevs(struct rcar_drif_sdr *sdr)
 		return 0;
 
 	notifier->subdevs[notifier->num_subdevs] = &sdr->ep.asd;
-	fwnode = fwnode_graph_get_remote_port_parent(ep);
+	fwnode = fwnode_graph_get_remote_endpoint(ep);
 	if (!fwnode) {
 		dev_warn(sdr->dev, "bad remote port parent\n");
 		fwnode_handle_put(ep);
diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c
index ac4c450..18e0aa8 100644
--- a/drivers/media/platform/stm32/stm32-dcmi.c
+++ b/drivers/media/platform/stm32/stm32-dcmi.c
@@ -1511,7 +1511,7 @@ static int dcmi_graph_parse(struct stm32_dcmi *dcmi, struct device_node *node)
 		if (!ep)
 			return -EINVAL;
 
-		remote = of_graph_get_remote_port_parent(ep);
+		remote = of_graph_get_remote_endpoint(ep);
 		if (!remote) {
 			of_node_put(ep);
 			return -EINVAL;
diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c
index 8b586c8..9b29706 100644
--- a/drivers/media/platform/ti-vpe/cal.c
+++ b/drivers/media/platform/ti-vpe/cal.c
@@ -1699,7 +1699,7 @@ static int of_cal_create_instance(struct cal_ctx *ctx, int inst)
 		goto cleanup_exit;
 	}
 
-	sensor_node = of_graph_get_remote_port_parent(ep_node);
+	sensor_node = of_graph_get_remote_endpoint(ep_node);
 	if (!sensor_node) {
 		ctx_dbg(3, ctx, "can't get remote parent\n");
 		goto cleanup_exit;
diff --git a/drivers/media/platform/xilinx/xilinx-vipp.c b/drivers/media/platform/xilinx/xilinx-vipp.c
index d881cf0..17d4ac0 100644
--- a/drivers/media/platform/xilinx/xilinx-vipp.c
+++ b/drivers/media/platform/xilinx/xilinx-vipp.c
@@ -82,6 +82,8 @@ static int xvip_graph_build_one(struct xvip_composite_device *xdev,
 	dev_dbg(xdev->dev, "creating links for entity %s\n", local->name);
 
 	while (1) {
+		struct fwnode_handle *fwnode;
+
 		/* Get the next endpoint and parse its link. */
 		next = of_graph_get_next_endpoint(entity->node, ep);
 		if (next == NULL)
@@ -121,8 +123,11 @@ static int xvip_graph_build_one(struct xvip_composite_device *xdev,
 			continue;
 		}
 
+		fwnode = fwnode_graph_get_port_parent(link.remote_node);
+		fwnode_handle_put(fwnode);
+
 		/* Skip DMA engines, they will be processed separately. */
-		if (link.remote_node == of_fwnode_handle(xdev->dev->of_node)) {
+		if (fwnode == of_fwnode_handle(xdev->dev->of_node)) {
 			dev_dbg(xdev->dev, "skipping DMA port %pOF:%u\n",
 				to_of_node(link.local_node),
 				link.local_port);
@@ -367,20 +372,25 @@ static int xvip_graph_parse_one(struct xvip_composite_device *xdev,
 	dev_dbg(xdev->dev, "parsing node %pOF\n", node);
 
 	while (1) {
+		struct fwnode_handle *fwnode;
+
 		ep = of_graph_get_next_endpoint(node, ep);
 		if (ep == NULL)
 			break;
 
 		dev_dbg(xdev->dev, "handling endpoint %pOF\n", ep);
 
-		remote = of_graph_get_remote_port_parent(ep);
+		remote = of_graph_get_remote_endpoint(ep);
 		if (remote == NULL) {
 			ret = -EINVAL;
 			break;
 		}
 
+		fwnode = fwnode_graph_get_port_parent(of_fwnode_handle(remote));
+		fwnode_handle_put(fwnode);
+
 		/* Skip entities that we have already processed. */
-		if (remote == xdev->dev->of_node ||
+		if (fwnode == xdev->dev->of_node ||
 		    xvip_graph_find_entity(xdev, remote)) {
 			of_node_put(remote);
 			continue;
diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
index a7c3464..a6bddff 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -539,8 +539,12 @@ int v4l2_async_register_subdev(struct v4l2_subdev *sd)
 	 * (struct v4l2_subdev.dev), and async sub-device does not
 	 * exist independently of the device at any point of time.
 	 */
-	if (!sd->fwnode && sd->dev)
-		sd->fwnode = dev_fwnode(sd->dev);
+	if (!sd->fwnode && sd->dev) {
+		sd->fwnode = fwnode_graph_get_next_endpoint(
+			dev_fwnode(sd->dev), NULL);
+		if (!sd->fwnode)
+			sd->fwnode = dev_fwnode(sd->dev);
+	}
 
 	mutex_lock(&list_lock);
 
diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c
index 681b192..a5a47e1 100644
--- a/drivers/media/v4l2-core/v4l2-fwnode.c
+++ b/drivers/media/v4l2-core/v4l2-fwnode.c
@@ -360,7 +360,7 @@ static int v4l2_async_notifier_fwnode_parse_endpoint(
 
 	asd->match_type = V4L2_ASYNC_MATCH_FWNODE;
 	asd->match.fwnode.fwnode =
-		fwnode_graph_get_remote_port_parent(endpoint);
+		fwnode_graph_get_remote_endpoint(endpoint);
 	if (!asd->match.fwnode.fwnode) {
 		dev_warn(dev, "bad remote port parent\n");
 		ret = -EINVAL;
-- 
2.7.4




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