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134 lines
3.5 KiB
134 lines
3.5 KiB
#ifndef __UAPI_CAM_SYNC_H__
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#define __UAPI_CAM_SYNC_H__
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#include <linux/videodev2.h>
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#include <linux/types.h>
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#include <linux/ioctl.h>
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#include <linux/media.h>
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#define CAM_SYNC_DEVICE_NAME "cam_sync_device"
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/* V4L event which user space will subscribe to */
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#define CAM_SYNC_V4L_EVENT (V4L2_EVENT_PRIVATE_START + 0)
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/* Specific event ids to get notified in user space */
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#define CAM_SYNC_V4L_EVENT_ID_CB_TRIG 0
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/* Size of opaque payload sent to kernel for safekeeping until signal time */
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#define CAM_SYNC_USER_PAYLOAD_SIZE 2
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/* Device type for sync device needed for device discovery */
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#define CAM_SYNC_DEVICE_TYPE (MEDIA_ENT_F_OLD_BASE)
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#define CAM_SYNC_GET_PAYLOAD_PTR(ev, type) \
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(type *)((char *)ev.u.data + sizeof(struct cam_sync_ev_header))
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#define CAM_SYNC_GET_HEADER_PTR(ev) \
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((struct cam_sync_ev_header *)ev.u.data)
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#define CAM_SYNC_STATE_INVALID 0
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#define CAM_SYNC_STATE_ACTIVE 1
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#define CAM_SYNC_STATE_SIGNALED_SUCCESS 2
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#define CAM_SYNC_STATE_SIGNALED_ERROR 3
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/**
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* struct cam_sync_ev_header - Event header for sync event notification
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*
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* @sync_obj: Sync object
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* @status: Status of the object
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*/
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struct cam_sync_ev_header {
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int32_t sync_obj;
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int32_t status;
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};
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/**
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* struct cam_sync_info - Sync object creation information
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*
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* @name: Optional string representation of the sync object
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* @sync_obj: Sync object returned after creation in kernel
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*/
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struct cam_sync_info {
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char name[64];
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int32_t sync_obj;
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};
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/**
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* struct cam_sync_signal - Sync object signaling struct
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*
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* @sync_obj: Sync object to be signaled
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* @sync_state: State of the sync object to which it should be signaled
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*/
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struct cam_sync_signal {
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int32_t sync_obj;
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uint32_t sync_state;
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};
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/**
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* struct cam_sync_merge - Merge information for sync objects
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*
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* @sync_objs: Pointer to sync objects
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* @num_objs: Number of objects in the array
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* @merged: Merged sync object
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*/
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struct cam_sync_merge {
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__u64 sync_objs;
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uint32_t num_objs;
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int32_t merged;
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};
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/**
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* struct cam_sync_userpayload_info - Payload info from user space
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*
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* @sync_obj: Sync object for which payload has to be registered for
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* @reserved: Reserved
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* @payload: Pointer to user payload
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*/
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struct cam_sync_userpayload_info {
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int32_t sync_obj;
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uint32_t reserved;
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__u64 payload[CAM_SYNC_USER_PAYLOAD_SIZE];
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};
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/**
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* struct cam_sync_wait - Sync object wait information
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*
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* @sync_obj: Sync object to wait on
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* @reserved: Reserved
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* @timeout_ms: Timeout in milliseconds
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*/
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struct cam_sync_wait {
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int32_t sync_obj;
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uint32_t reserved;
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uint64_t timeout_ms;
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};
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/**
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* struct cam_private_ioctl_arg - Sync driver ioctl argument
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*
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* @id: IOCTL command id
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* @size: Size of command payload
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* @result: Result of command execution
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* @reserved: Reserved
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* @ioctl_ptr: Pointer to user data
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*/
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struct cam_private_ioctl_arg {
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__u32 id;
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__u32 size;
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__u32 result;
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__u32 reserved;
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__u64 ioctl_ptr;
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};
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#define CAM_PRIVATE_IOCTL_CMD \
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_IOWR('V', BASE_VIDIOC_PRIVATE, struct cam_private_ioctl_arg)
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#define CAM_SYNC_CREATE 0
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#define CAM_SYNC_DESTROY 1
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#define CAM_SYNC_SIGNAL 2
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#define CAM_SYNC_MERGE 3
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#define CAM_SYNC_REGISTER_PAYLOAD 4
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#define CAM_SYNC_DEREGISTER_PAYLOAD 5
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#define CAM_SYNC_WAIT 6
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#endif /* __UAPI_CAM_SYNC_H__ */
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