In preparation for Gen3 support move the subdevice initialization and
clean up from rvin_v4l2_{register,unregister}() directly to the async
callbacks. This simplifies the addition of Gen3 support as the
rvin_v4l2_register() can be shared for both Gen2 and Gen3 while direct
subdevice control are only used on Gen2.
While moving this code drop a large comment which is copied from the
framework documentation and fold rvin_mbus_supported() into its only
caller. Also move the initialization and cleanup code to separate
functions to increase readability.
Signed-off-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
---
drivers/media/platform/rcar-vin/rcar-core.c | 108 +++++++++++++++++++---------
drivers/media/platform/rcar-vin/rcar-v4l2.c | 35 ---------
2 files changed, 74 insertions(+), 69 deletions(-)
diff --git a/drivers/media/platform/rcar-vin/rcar-core.c
b/drivers/media/platform/rcar-vin/rcar-core.c
index 47f06acde2e698f2..663309ca9c04f208 100644
--- a/drivers/media/platform/rcar-vin/rcar-core.c
+++ b/drivers/media/platform/rcar-vin/rcar-core.c
@@ -46,46 +46,88 @@ static int rvin_find_pad(struct v4l2_subdev *sd, int
direction)
return -EINVAL;
}
-static bool rvin_mbus_supported(struct rvin_graph_entity *entity)
+/* The vin lock shuld be held when calling the subdevice attach and detach */
+static int rvin_digital_subdevice_attach(struct rvin_dev *vin,
+ struct v4l2_subdev *subdev)
{
- struct v4l2_subdev *sd = entity->subdev;
struct v4l2_subdev_mbus_code_enum code = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
+ int ret;
+ /* Find source and sink pad of remote subdevice */
+ ret = rvin_find_pad(subdev, MEDIA_PAD_FL_SOURCE);
+ if (ret < 0)
+ return ret;
+ vin->digital->source_pad = ret;
+
+ ret = rvin_find_pad(subdev, MEDIA_PAD_FL_SINK);
+ vin->digital->sink_pad = ret < 0 ? 0 : ret;
+
+ /* Find compatible subdevices mbus format */
+ vin->digital->code = 0;
code.index = 0;
- code.pad = entity->source_pad;
- while (!v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code)) {
+ code.pad = vin->digital->source_pad;
+ while (!vin->digital->code &&
+ !v4l2_subdev_call(subdev, pad, enum_mbus_code, NULL, &code)) {
code.index++;
switch (code.code) {
case MEDIA_BUS_FMT_YUYV8_1X16:
case MEDIA_BUS_FMT_UYVY8_2X8:
case MEDIA_BUS_FMT_UYVY10_2X10:
case MEDIA_BUS_FMT_RGB888_1X24:
- entity->code = code.code;
- return true;
+ vin->digital->code = code.code;
+ vin_dbg(vin, "Found media bus format for %s: %d\n",
+ subdev->name, vin->digital->code);
+ break;
default:
break;
}
}
- return false;
-}
-
-static int rvin_digital_notify_complete(struct v4l2_async_notifier *notifier)
-{
- struct rvin_dev *vin = notifier_to_vin(notifier);
- int ret;
-
- /* Verify subdevices mbus format */
- if (!rvin_mbus_supported(vin->digital)) {
+ if (!vin->digital->code) {
vin_err(vin, "Unsupported media bus format for %s\n",
- vin->digital->subdev->name);
+ subdev->name);
return -EINVAL;
}
- vin_dbg(vin, "Found media bus format for %s: %d\n",
- vin->digital->subdev->name, vin->digital->code);
+ /* Read tvnorms */
+ ret = v4l2_subdev_call(subdev, video, g_tvnorms, &vin->vdev.tvnorms);
+ if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
+ return ret;
+
+ /* Add the controls */
+ ret = v4l2_ctrl_handler_init(&vin->ctrl_handler, 16);
+ if (ret < 0)
+ return ret;
+
+ ret = v4l2_ctrl_add_handler(&vin->ctrl_handler, subdev->ctrl_handler,
+ NULL);
+ if (ret < 0) {
+ v4l2_ctrl_handler_free(&vin->ctrl_handler);
+ return ret;
+ }
+
+ vin->vdev.ctrl_handler = &vin->ctrl_handler;
+
+ vin->digital->subdev = subdev;
+
+ return 0;
+}
+
+static void rvin_digital_subdevice_detach(struct rvin_dev *vin)
+{
+ rvin_v4l2_unregister(vin);
+ v4l2_ctrl_handler_free(&vin->ctrl_handler);
+
+ vin->vdev.ctrl_handler = NULL;
+ vin->digital->subdev = NULL;
+}
+
+static int rvin_digital_notify_complete(struct v4l2_async_notifier *notifier)
+{
+ struct rvin_dev *vin = notifier_to_vin(notifier);
+ int ret;
ret = v4l2_device_register_subdev_nodes(&vin->v4l2_dev);
if (ret < 0) {
@@ -103,8 +145,10 @@ static void rvin_digital_notify_unbind(struct
v4l2_async_notifier *notifier,
struct rvin_dev *vin = notifier_to_vin(notifier);
vin_dbg(vin, "unbind digital subdev %s\n", subdev->name);
- rvin_v4l2_unregister(vin);
- vin->digital->subdev = NULL;
+
+ mutex_lock(&vin->lock);
+ rvin_digital_subdevice_detach(vin);
+ mutex_unlock(&vin->lock);
}
static int rvin_digital_notify_bound(struct v4l2_async_notifier *notifier,
@@ -114,33 +158,27 @@ static int rvin_digital_notify_bound(struct
v4l2_async_notifier *notifier,
struct rvin_dev *vin = notifier_to_vin(notifier);
int ret;
+ mutex_lock(&vin->lock);
+ ret = rvin_digital_subdevice_attach(vin, subdev);
+ mutex_unlock(&vin->lock);
+ if (ret)
+ return ret;
+
v4l2_set_subdev_hostdata(subdev, vin);
- /* Find source and sink pad of remote subdevice */
-
- ret = rvin_find_pad(subdev, MEDIA_PAD_FL_SOURCE);
- if (ret < 0)
- return ret;
- vin->digital->source_pad = ret;
-
- ret = rvin_find_pad(subdev, MEDIA_PAD_FL_SINK);
- vin->digital->sink_pad = ret < 0 ? 0 : ret;
-
- vin->digital->subdev = subdev;
-
vin_dbg(vin, "bound subdev %s source pad: %u sink pad: %u\n",
subdev->name, vin->digital->source_pad,
vin->digital->sink_pad);
return 0;
}
+
static const struct v4l2_async_notifier_operations rvin_digital_notify_ops = {
.bound = rvin_digital_notify_bound,
.unbind = rvin_digital_notify_unbind,
.complete = rvin_digital_notify_complete,
};
-
static int rvin_digital_parse_v4l2(struct device *dev,
struct v4l2_fwnode_endpoint *vep,
struct v4l2_async_subdev *asd)
@@ -277,6 +315,8 @@ static int rcar_vin_remove(struct platform_device *pdev)
v4l2_async_notifier_unregister(&vin->notifier);
v4l2_async_notifier_cleanup(&vin->notifier);
+ v4l2_ctrl_handler_free(&vin->ctrl_handler);
+
rvin_dma_unregister(vin);
return 0;
diff --git a/drivers/media/platform/rcar-vin/rcar-v4l2.c
b/drivers/media/platform/rcar-vin/rcar-v4l2.c
index 32a658214f48fa49..4a0610a6b4503501 100644
--- a/drivers/media/platform/rcar-vin/rcar-v4l2.c
+++ b/drivers/media/platform/rcar-vin/rcar-v4l2.c
@@ -847,9 +847,6 @@ void rvin_v4l2_unregister(struct rvin_dev *vin)
v4l2_info(&vin->v4l2_dev, "Removing %s\n",
video_device_node_name(&vin->vdev));
- /* Checks internaly if handlers have been init or not */
- v4l2_ctrl_handler_free(&vin->ctrl_handler);
-
/* Checks internaly if vdev have been init or not */
video_unregister_device(&vin->vdev);
}
@@ -872,41 +869,10 @@ static void rvin_notify(struct v4l2_subdev *sd,
int rvin_v4l2_register(struct rvin_dev *vin)
{
struct video_device *vdev = &vin->vdev;
- struct v4l2_subdev *sd = vin_to_source(vin);
int ret;
- v4l2_set_subdev_hostdata(sd, vin);
-
vin->v4l2_dev.notify = rvin_notify;
- ret = v4l2_subdev_call(sd, video, g_tvnorms, &vin->vdev.tvnorms);
- if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
- return ret;
-
- if (vin->vdev.tvnorms == 0) {
- /* Disable the STD API if there are no tvnorms defined */
- v4l2_disable_ioctl(&vin->vdev, VIDIOC_G_STD);
- v4l2_disable_ioctl(&vin->vdev, VIDIOC_S_STD);
- v4l2_disable_ioctl(&vin->vdev, VIDIOC_QUERYSTD);
- v4l2_disable_ioctl(&vin->vdev, VIDIOC_ENUMSTD);
- }
-
- /* Add the controls */
- /*
- * Currently the subdev with the largest number of controls (13) is
- * ov6550. So let's pick 16 as a hint for the control handler. Note
- * that this is a hint only: too large and you waste some memory, too
- * small and there is a (very) small performance hit when looking up
- * controls in the internal hash.
- */
- ret = v4l2_ctrl_handler_init(&vin->ctrl_handler, 16);
- if (ret < 0)
- return ret;
-
- ret = v4l2_ctrl_add_handler(&vin->ctrl_handler, sd->ctrl_handler, NULL);
- if (ret < 0)
- return ret;
-
/* video node */
vdev->fops = &rvin_fops;
vdev->v4l2_dev = &vin->v4l2_dev;
@@ -915,7 +881,6 @@ int rvin_v4l2_register(struct rvin_dev *vin)
vdev->release = video_device_release_empty;
vdev->ioctl_ops = &rvin_ioctl_ops;
vdev->lock = &vin->lock;
- vdev->ctrl_handler = &vin->ctrl_handler;
vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
V4L2_CAP_READWRITE;
--
2.16.1
