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media: v4l2-fwnode: Switch to v4l2_async_notifier_add_subdev

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The fwnode endpoint and reference parsing functions in v4l2-fwnode.c
are modified to make use of v4l2_async_notifier_add_subdev().
As a result the notifier->subdevs array is no longer allocated or
re-allocated, and by extension the max_subdevs value is also no
longer needed.

Callers of the fwnode endpoint and reference parsing functions must now
first initialize the notifier with a call to v4l2_async_notifier_init().
This includes the function v4l2_async_register_subdev_sensor_common(),
and the intel-ipu3, omap3isp, and rcar-vin drivers.

Since the notifier->subdevs array is no longer allocated in the
fwnode endpoint and reference parsing functions, the callers of
those functions must never reference that array, since it is now
NULL. Of the drivers that make use of the fwnode/ref parsing,
only the intel-ipu3 driver references the ->subdevs[] array,
(in the notifier completion callback), so that driver has been
modified to iterate through the notifier->asd_list instead.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Steve Longerbeam
2018-09-29 15:54:08 -04:00
committed by Mauro Carvalho Chehab
parent 23989b43f1
commit eae2aed1ea
7 changed files with 54 additions and 127 deletions
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1
drivers/media/platform/omap3isp/isp.c
View File

@@ -2220,6 +2220,7 @@ static int isp_probe(struct platform_device *pdev)
mutex_init(&isp->isp_mutex);
spin_lock_init(&isp->stat_lock);
v4l2_async_notifier_init(&isp->notifier);
ret = v4l2_async_notifier_parse_fwnode_endpoints(
&pdev->dev, &isp->notifier, sizeof(struct isp_async_subdev),

4
drivers/media/platform/rcar-vin/rcar-core.c
View File

@@ -610,6 +610,8 @@ static int rvin_parallel_init(struct rvin_dev *vin)
{
int ret;
v4l2_async_notifier_init(&vin->notifier);
ret = v4l2_async_notifier_parse_fwnode_endpoints_by_port(
vin->dev, &vin->notifier, sizeof(struct rvin_parallel_entity),
0, rvin_parallel_parse_v4l2);
@@ -802,6 +804,8 @@ static int rvin_mc_parse_of_graph(struct rvin_dev *vin)
return 0;
}
v4l2_async_notifier_init(&vin->group->notifier);
/*
* Have all VIN's look for CSI-2 subdevices. Some subdevices will
* overlap but the parser function can handle it, so each subdevice