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media: v4l: add API to clear unready device

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Change-Id: I497719e6e8f2ef25a9d6402c16733bf4318d06d7
Signed-off-by: Cai YiWei <cyw@rock-chips.com>
This commit is contained in:
Cai YiWei
2021-08-17 11:01:16 +08:00
committed by Tao Huang
parent f463bdf4d8
commit a2d74ca47b
2 changed files with 69 additions and 0 deletions
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54
drivers/media/v4l2-core/v4l2-async.c
View File

@@ -555,6 +555,60 @@ int v4l2_async_notifier_register(struct v4l2_device *v4l2_dev,
}
EXPORT_SYMBOL(v4l2_async_notifier_register);
#if IS_ENABLED(CONFIG_NO_GKI)
static int __v4l2_async_notifier_clr_unready_dev(
struct v4l2_async_notifier *notifier)
{
struct v4l2_subdev *sd, *tmp;
int clr_num = 0;
list_for_each_entry_safe(sd, tmp, &notifier->done, async_list) {
struct v4l2_async_notifier *subdev_notifier =
v4l2_async_find_subdev_notifier(sd);
if (subdev_notifier)
clr_num += __v4l2_async_notifier_clr_unready_dev(
subdev_notifier);
}
list_for_each_entry_safe(sd, tmp, &notifier->waiting, async_list) {
list_del_init(&sd->async_list);
sd->asd = NULL;
sd->dev = NULL;
clr_num++;
}
return clr_num;
}
int v4l2_async_notifier_clr_unready_dev(struct v4l2_async_notifier *notifier)
{
int ret = 0;
int clr_num = 0;
mutex_lock(&list_lock);
while (notifier->parent)
notifier = notifier->parent;
if (!notifier->v4l2_dev)
goto out;
clr_num = __v4l2_async_notifier_clr_unready_dev(notifier);
dev_info(notifier->v4l2_dev->dev,
"clear unready subdev num: %d\n", clr_num);
if (clr_num > 0)
ret = v4l2_async_notifier_try_complete(notifier);
out:
mutex_unlock(&list_lock);
return ret;
}
EXPORT_SYMBOL(v4l2_async_notifier_clr_unready_dev);
#endif
int v4l2_async_subdev_notifier_register(struct v4l2_subdev *sd,
struct v4l2_async_notifier *notifier)
{

15
include/media/v4l2-async.h
View File

@@ -265,6 +265,21 @@ int v4l2_async_notifier_register(struct v4l2_device *v4l2_dev,
int v4l2_async_subdev_notifier_register(struct v4l2_subdev *sd,
struct v4l2_async_notifier *notifier);
/**
* v4l2_async_notifier_clr_unready_dev - remove unready subdevice
*
* @notifier: pointer to &struct v4l2_async_notifier
*/
#if IS_ENABLED(CONFIG_NO_GKI)
int v4l2_async_notifier_clr_unready_dev(struct v4l2_async_notifier *notifier);
#else
static inline int
v4l2_async_notifier_clr_unready_dev(struct v4l2_async_notifier *notifier)
{
return 0;
}
#endif
/**
* v4l2_async_notifier_unregister - unregisters a subdevice
* asynchronous notifier