u32 flags;--标志位,V4L2_SUBDEV_FL_HAS_DEVNODE表示要为此subdev创建一个设备节点。structv4l2_device *v4l2_dev;conststructv4l2_subdev_ops *ops;--v4l2_subdev私有的操作函数差异体现在v4l2_subdev_ops中。conststructv4l2_subdev_internal_ops *in
/drivers/media/v4l2-core/v4l2-subdev.c 在linux内核中,许多驱动程序需要与子设备通信,这些子设备用于完成一些子任务,最常见的是:处理音频或视频的播放、编码或解码。例如:对于网络摄像机来说,常用的子设备是:传感器和摄像机控制器。这些设备通常是I2C设备(但也不全是)。为了给驱动程序提供与这些子设备一致的接口...
->v4l2_subdev_init--注册操作函数集为csi2_subdev_ops的subdev,设备名称为"rockchip-mipi-csi2"。V4L2_SUBDEV_FL_HAS_DEVNODE表示需要创建device node。->devm_request_irq--获取中断并注册中断处理函数。 ->rk_csirx_irq1_handler--中断1的处理函数。 ->rk_csirx_irq2_handler--中断2的处理函数。 ->csi...
v4l2_subdev_init(sd, &rkisp_csi_ops); sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; //是否需要子节点 sd->entity.ops = &rkisp_csi_media_ops; sd->entity.function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN; snprintf(sd->name, sizeof(sd->name), CSI_DEV_NAME);//名字前缀,#define CSI_DEV_NAME...
void (*notify)(struct v4l2_subdev *sd, unsigned int notification, void *arg); //函数指针,报告一些子设备调用的回调函数 struct v4l2_ctrl_handler *ctrl_handler; //控制处理数据结构 struct v4l2_prio_state prio; //优先级状态 struct kref ref; //计数 ...
[include/media/v4l2-subdev.h]#define V4L2_SUBDEV_FL_IS_I2C (1U << 0) // 从设备是I2C设备#define V4L2_SUBDEV_FL_IS_SPI (1U << 1) // 从设备是SPI设备#define V4L2_SUBDEV_FL_HAS_DEVNODE (1U << 2) // 从设备需要设备节点#define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3) // 从设备会...
v4l2_i2c_subdev_init(&sensor->subdev, client, &ar0330_subdev_ops); Then you can fill up the _HAS_DEVNODE flag, which tells V4L2 that your device wishes to expose the /dev/v4l-subdevX: sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; sensor->subdev.grp_id = 678; And only then...
rkisp_register_csi_subdev(){ …… v4l2_subdev_init(sd, &rkisp_csi_ops); sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;//是否需要子节点sd->entity.ops = &rkisp_csi_media_ops; sd->entity.function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;snprintf(sd->name,sizeof(sd->name), CSI_DEV_NAME);//...
v4l-subdev0 v4l-subdev2 video1 video3 video5 video7 v4l-subdev1 video0 video2 video4 video6 video8 rk3568_r:/# cat sys/class/video4linux/video0/dev cat sys/class/video4linux/video0/dev81:0rk3568_r:/# cat sys/class/video4linux/video0/name ...
641 + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | 642 + V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_STREAMS; 643 + sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER; 644 + sd->entity.ops = &formatter_entity_ops; ...