| /* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */ |
| /* |
| * Copyright (c) 2020 Amlogic, Inc. All rights reserved. |
| */ |
| |
| #ifndef __VIDEO_TUNNEL_H |
| #define __VIDEO_TUNNEL_H |
| |
| struct vt_session; |
| |
| /** |
| * vt_session_create() - allocate a vt_session and return it |
| * @name: used for debugging |
| */ |
| struct vt_session *vt_session_create(const char *name); |
| |
| /** |
| * vt_session_destroy() - free's a vt_session and it's all vt_buffers |
| * @session: the vt_session |
| * |
| * Free the provided session and all it's resources. |
| */ |
| void vt_session_destroy(struct vt_session *session); |
| |
| /** |
| * vt_alloc_id() - allocate an unique videotunnel id |
| * @session: the vt_session |
| * @tunnel_id: tunnel id to return |
| * |
| * Return of a value other than 0 means an error has occurred. |
| */ |
| int vt_alloc_id(struct vt_session *session, int *tunnel_id); |
| |
| /** |
| * vt_free_id() - free tunnel id allocated previous |
| * @session: the vt_session |
| * @tunnel_id: tunnel id to free |
| * |
| * Return of a value other than 0 means an error has occurred. |
| */ |
| int vt_free_id(struct vt_session *session, int tunnel_id); |
| |
| /** |
| * vt_producer_connect() - producer connect to a sepecific videotunnel |
| * @session: the vt_session |
| * @tunnel_id: tunnel id on which to connect |
| * |
| * Before queue/deueue bufer, producer need connect to videotunnel. |
| * Return of a value other than 0 means an error has occurred. |
| */ |
| int vt_producer_connect(struct vt_session *session, int tunnel_id); |
| |
| /** |
| * vt_prodecer_disconnect - producer disconnect to a sepecific videotunnel |
| * @session: the vt_session |
| * @tunnel_id: tunnel id on which to disconnect |
| * |
| * All the videotunnel buffer on the disconnected side will be freed. |
| * Return of a value other than 0 means an error has occurred. |
| */ |
| int vt_producer_disconnect(struct vt_session *session, int tunnel_id); |
| |
| /** |
| * vt_queue_buffer - transfer ownership of the buffer to consumer |
| * @session: the vt_session |
| * @tunnel_id: tunnel id on which to queuebuffer |
| * @buffer_fd: buffer fd to transfer |
| * @fence_fd: acquire fence, not used currently |
| * |
| * Return of a value other than 0 means an error has occurred. |
| */ |
| int vt_queue_buffer(struct vt_session *session, int tunnel_id, |
| struct file *buffer_file, |
| int fence_fd, int64_t time_stamp); |
| |
| /** |
| * vt_dequeue_buffer -requests a buffer from videotunnel to use. |
| * @session: the vt_session |
| * @tunnel_id: tunnel id on which to dequeuebuffer |
| * @buffer_fd: buffer fd to get from videotunnel |
| * @fence_fd: release fence not used currently, waited in vt driver |
| * |
| * Ownership of the buffer is transferred to the producer. The returned |
| * buffer is previous queued use vt_queue_buffer. If no buffer is pending, |
| * it returns -EAGAIN with a default 4ms timeout. |
| */ |
| int vt_dequeue_buffer(struct vt_session *session, int tunnel_id, |
| struct file **buffer_file, struct file **fence_file); |
| |
| /** |
| * vt_send_cmd - send videotunnel cmd to server |
| * @session: the vt_session |
| * @tunnel_id: tunnel id on which to send cmd |
| * @cmd: vt cmd |
| * @cmd_data: dmc data |
| */ |
| int vt_send_cmd(struct vt_session *session, int tunnel_id, |
| enum vt_video_cmd_e cmd, int cmd_data); |
| |
| #endif /* __VIDEO_TUNNEL_H */ |
