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drivers/video: add unlink api to release driver private data after supporing multi instance

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Signed-off-by: yuexinyi <yuexinyi@xiaomi.com>
This commit is contained in:
yuexinyi 2023-07-04 22:21:50 +08:00 committed by Xiang Xiao
parent 96ea877490
commit 52859fe10f
1 changed files with 44 additions and 6 deletions
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50
drivers/video/video.c
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@ -187,6 +187,9 @@ struct video_mng_s
enum v4l2_scene_mode video_scene_mode;
uint8_t video_scence_num;
FAR video_scene_params_t *video_scene_param[V4L2_SCENE_MODE_MAX];
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
bool unlinked;
#endif
};
typedef struct video_mng_s video_mng_t;
@ -208,7 +211,9 @@ static int video_mmap(FAR struct file *filep,
FAR struct mm_map_entry_s *map);
static int video_poll(FAR struct file *filep, FAR struct pollfd *fds,
bool setup);
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
static int video_unlink(FAR struct inode *inode);
#endif
/* Common function */
static FAR video_type_inf_t *
@ -310,6 +315,9 @@ static const struct file_operations g_video_fops =
video_mmap, /* mmap */
NULL, /* truncate */
video_poll, /* poll */
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
video_unlink, /* unlink */
#endif
};
static bool g_video_initialized = false;
@ -1074,17 +1082,24 @@ static int video_close(FAR struct file *filep)
FAR video_mng_t *priv = (FAR video_mng_t *)inode->i_private;
nxmutex_lock(&priv->lock_open_num);
if (priv->open_num == 0)
{
nxmutex_unlock(&priv->lock_open_num);
return OK;
}
if (--priv->open_num == 0)
{
cleanup_resources(priv);
IMGSENSOR_UNINIT(priv->imgsensor);
IMGDATA_UNINIT(priv->imgdata);
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
if (priv->unlinked)
{
nxmutex_unlock(&priv->lock_open_num);
nxmutex_destroy(&priv->lock_open_num);
kmm_free(priv->devpath);
kmm_free(priv);
inode->i_private = NULL;
return OK;
}
#endif
}
nxmutex_unlock(&priv->lock_open_num);
@ -1103,6 +1118,29 @@ static ssize_t video_write(FAR struct file *filep,
return -ENOTSUP;
}
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
static int video_unlink(FAR struct inode *inode)
{
FAR video_mng_t *priv = (FAR video_mng_t *)inode->i_private;
nxmutex_lock(&priv->lock_open_num);
if (priv->open_num == 0)
{
nxmutex_unlock(&priv->lock_open_num);
nxmutex_destroy(&priv->lock_open_num);
kmm_free(priv->devpath);
kmm_free(priv);
inode->i_private = NULL;
}
else
{
priv->unlinked = true;
nxmutex_unlock(&priv->lock_open_num);
}
return OK;
}
#endif
static int video_querycap(FAR video_mng_t *vmng,
FAR struct v4l2_capability *cap)
{