--- zzzz-none-000/linux-3.10.107/include/media/videobuf2-core.h 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/include/media/videobuf2-core.h 2021-02-04 17:41:59.000000000 +0000 @@ -1,5 +1,5 @@ /* - * videobuf2-core.h - V4L2 driver helper framework + * videobuf2-core.h - Video Buffer 2 Core Framework * * Copyright (C) 2010 Samsung Electronics * @@ -15,11 +15,21 @@ #include #include #include -#include #include +#define VB2_MAX_FRAME (32) +#define VB2_MAX_PLANES (8) + +enum vb2_memory { + VB2_MEMORY_UNKNOWN = 0, + VB2_MEMORY_MMAP = 1, + VB2_MEMORY_USERPTR = 2, + VB2_MEMORY_DMABUF = 4, +}; + struct vb2_alloc_ctx; struct vb2_fileio_data; +struct vb2_threadio_data; /** * struct vb2_mem_ops - memory handling/memory allocator operations @@ -34,66 +44,72 @@ * usually will result in the allocator freeing the buffer (if * no other users of this buffer are present); the buf_priv * argument is the allocator private per-buffer structure - * previously returned from the alloc callback + * previously returned from the alloc callback. + * @get_dmabuf: acquire userspace memory for a hardware operation; used for + * DMABUF memory types. * @get_userptr: acquire userspace memory for a hardware operation; used for * USERPTR memory types; vaddr is the address passed to the * videobuf layer when queuing a video buffer of USERPTR type; * should return an allocator private per-buffer structure * associated with the buffer on success, NULL on failure; * the returned private structure will then be passed as buf_priv - * argument to other ops in this structure + * argument to other ops in this structure. * @put_userptr: inform the allocator that a USERPTR buffer will no longer - * be used + * be used. * @attach_dmabuf: attach a shared struct dma_buf for a hardware operation; * used for DMABUF memory types; alloc_ctx is the alloc context * dbuf is the shared dma_buf; returns NULL on failure; * allocator private per-buffer structure on success; - * this needs to be used for further accesses to the buffer + * this needs to be used for further accesses to the buffer. * @detach_dmabuf: inform the exporter of the buffer that the current DMABUF * buffer is no longer used; the buf_priv argument is the * allocator private per-buffer structure previously returned - * from the attach_dmabuf callback + * from the attach_dmabuf callback. * @map_dmabuf: request for access to the dmabuf from allocator; the allocator * of dmabuf is informed that this driver is going to use the - * dmabuf + * dmabuf. * @unmap_dmabuf: releases access control to the dmabuf - allocator is notified - * that this driver is done using the dmabuf for now + * that this driver is done using the dmabuf for now. * @prepare: called every time the buffer is passed from userspace to the - * driver, useful for cache synchronisation, optional + * driver, useful for cache synchronisation, optional. * @finish: called every time the buffer is passed back from the driver - * to the userspace, also optional + * to the userspace, also optional. * @vaddr: return a kernel virtual address to a given memory buffer * associated with the passed private structure or NULL if no - * such mapping exists + * such mapping exists. * @cookie: return allocator specific cookie for a given memory buffer * associated with the passed private structure or NULL if not - * available + * available. * @num_users: return the current number of users of a memory buffer; * return 1 if the videobuf layer (or actually the driver using - * it) is the only user + * it) is the only user. * @mmap: setup a userspace mapping for a given memory buffer under - * the provided virtual memory region + * the provided virtual memory region. * * Required ops for USERPTR types: get_userptr, put_userptr. * Required ops for MMAP types: alloc, put, num_users, mmap. - * Required ops for read/write access types: alloc, put, num_users, vaddr + * Required ops for read/write access types: alloc, put, num_users, vaddr. * Required ops for DMABUF types: attach_dmabuf, detach_dmabuf, map_dmabuf, * unmap_dmabuf. */ struct vb2_mem_ops { - void *(*alloc)(void *alloc_ctx, unsigned long size, gfp_t gfp_flags); + void *(*alloc)(void *alloc_ctx, unsigned long size, + enum dma_data_direction dma_dir, + gfp_t gfp_flags); void (*put)(void *buf_priv); - struct dma_buf *(*get_dmabuf)(void *buf_priv); + struct dma_buf *(*get_dmabuf)(void *buf_priv, unsigned long flags); void *(*get_userptr)(void *alloc_ctx, unsigned long vaddr, - unsigned long size, int write); + unsigned long size, + enum dma_data_direction dma_dir); void (*put_userptr)(void *buf_priv); void (*prepare)(void *buf_priv); void (*finish)(void *buf_priv); void *(*attach_dmabuf)(void *alloc_ctx, struct dma_buf *dbuf, - unsigned long size, int write); + unsigned long size, + enum dma_data_direction dma_dir); void (*detach_dmabuf)(void *buf_priv); int (*map_dmabuf)(void *buf_priv); void (*unmap_dmabuf)(void *buf_priv); @@ -106,10 +122,40 @@ int (*mmap)(void *buf_priv, struct vm_area_struct *vma); }; +/** + * struct vb2_plane - plane information + * @mem_priv: private data with this plane + * @dbuf: dma_buf - shared buffer object + * @dbuf_mapped: flag to show whether dbuf is mapped or not + * @bytesused: number of bytes occupied by data in the plane (payload) + * @length: size of this plane (NOT the payload) in bytes + * @offset: when memory in the associated struct vb2_buffer is + * VB2_MEMORY_MMAP, equals the offset from the start of + * the device memory for this plane (or is a "cookie" that + * should be passed to mmap() called on the video node) + * @userptr: when memory is VB2_MEMORY_USERPTR, a userspace pointer + * pointing to this plane + * @fd: when memory is VB2_MEMORY_DMABUF, a userspace file + * descriptor associated with this plane + * @m: Union with memtype-specific data (@offset, @userptr or + * @fd). + * @data_offset: offset in the plane to the start of data; usually 0, + * unless there is a header in front of the data + * Should contain enough information to be able to cover all the fields + * of struct v4l2_plane at videodev2.h + */ struct vb2_plane { void *mem_priv; struct dma_buf *dbuf; unsigned int dbuf_mapped; + unsigned int bytesused; + unsigned int length; + union { + unsigned int offset; + unsigned long userptr; + int fd; + } m; + unsigned int data_offset; }; /** @@ -129,21 +175,12 @@ }; /** - * enum vb2_fileio_flags - flags for selecting a mode of the file io emulator, - * by default the 'streaming' style is used by the file io emulator - * @VB2_FILEIO_READ_ONCE: report EOF after reading the first buffer - * @VB2_FILEIO_WRITE_IMMEDIATELY: queue buffer after each write() call - */ -enum vb2_fileio_flags { - VB2_FILEIO_READ_ONCE = (1 << 0), - VB2_FILEIO_WRITE_IMMEDIATELY = (1 << 1), -}; - -/** * enum vb2_buffer_state - current video buffer state * @VB2_BUF_STATE_DEQUEUED: buffer under userspace control + * @VB2_BUF_STATE_PREPARING: buffer is being prepared in videobuf * @VB2_BUF_STATE_PREPARED: buffer prepared in videobuf and by the driver * @VB2_BUF_STATE_QUEUED: buffer queued in videobuf, but not in driver + * @VB2_BUF_STATE_REQUEUEING: re-queue a buffer to the driver * @VB2_BUF_STATE_ACTIVE: buffer queued in driver and possibly used * in a hardware operation * @VB2_BUF_STATE_DONE: buffer returned from driver to videobuf, but @@ -154,8 +191,10 @@ */ enum vb2_buffer_state { VB2_BUF_STATE_DEQUEUED, + VB2_BUF_STATE_PREPARING, VB2_BUF_STATE_PREPARED, VB2_BUF_STATE_QUEUED, + VB2_BUF_STATE_REQUEUEING, VB2_BUF_STATE_ACTIVE, VB2_BUF_STATE_DONE, VB2_BUF_STATE_ERROR, @@ -165,42 +204,64 @@ /** * struct vb2_buffer - represents a video buffer - * @v4l2_buf: struct v4l2_buffer associated with this buffer; can - * be read by the driver and relevant entries can be - * changed by the driver in case of CAPTURE types - * (such as timestamp) - * @v4l2_planes: struct v4l2_planes associated with this buffer; can - * be read by the driver and relevant entries can be - * changed by the driver in case of CAPTURE types - * (such as bytesused); NOTE that even for single-planar - * types, the v4l2_planes[0] struct should be used - * instead of v4l2_buf for filling bytesused - drivers - * should use the vb2_set_plane_payload() function for that * @vb2_queue: the queue to which this driver belongs + * @index: id number of the buffer + * @type: buffer type + * @memory: the method, in which the actual data is passed * @num_planes: number of planes in the buffer * on an internal driver queue - * @state: current buffer state; do not change - * @queued_entry: entry on the queued buffers list, which holds all - * buffers queued from userspace - * @done_entry: entry on the list that stores all buffers ready to - * be dequeued to userspace * @planes: private per-plane information; do not change */ struct vb2_buffer { - struct v4l2_buffer v4l2_buf; - struct v4l2_plane v4l2_planes[VIDEO_MAX_PLANES]; - struct vb2_queue *vb2_queue; - + unsigned int index; + unsigned int type; + unsigned int memory; unsigned int num_planes; + struct vb2_plane planes[VB2_MAX_PLANES]; -/* Private: internal use only */ + /* private: internal use only + * + * state: current buffer state; do not change + * queued_entry: entry on the queued buffers list, which holds + * all buffers queued from userspace + * done_entry: entry on the list that stores all buffers ready + * to be dequeued to userspace + */ enum vb2_buffer_state state; struct list_head queued_entry; struct list_head done_entry; +#ifdef CONFIG_VIDEO_ADV_DEBUG + /* + * Counters for how often these buffer-related ops are + * called. Used to check for unbalanced ops. + */ + u32 cnt_mem_alloc; + u32 cnt_mem_put; + u32 cnt_mem_get_dmabuf; + u32 cnt_mem_get_userptr; + u32 cnt_mem_put_userptr; + u32 cnt_mem_prepare; + u32 cnt_mem_finish; + u32 cnt_mem_attach_dmabuf; + u32 cnt_mem_detach_dmabuf; + u32 cnt_mem_map_dmabuf; + u32 cnt_mem_unmap_dmabuf; + u32 cnt_mem_vaddr; + u32 cnt_mem_cookie; + u32 cnt_mem_num_users; + u32 cnt_mem_mmap; + + u32 cnt_buf_init; + u32 cnt_buf_prepare; + u32 cnt_buf_finish; + u32 cnt_buf_cleanup; + u32 cnt_buf_queue; - struct vb2_plane planes[VIDEO_MAX_PLANES]; + /* This counts the number of calls to vb2_buffer_done() */ + u32 cnt_buf_done; +#endif }; /** @@ -219,51 +280,71 @@ * configured format and *num_buffers is the total number * of buffers, that are being allocated. When called from * VIDIOC_CREATE_BUFS, fmt != NULL and it describes the - * target frame format. In this case *num_buffers are being - * allocated additionally to q->num_buffers. + * target frame format (if the format isn't valid the + * callback must return -EINVAL). In this case *num_buffers + * are being allocated additionally to q->num_buffers. * @wait_prepare: release any locks taken while calling vb2 functions; * it is called before an ioctl needs to wait for a new * buffer to arrive; required to avoid a deadlock in - * blocking access type + * blocking access type. * @wait_finish: reacquire all locks released in the previous callback; * required to continue operation after sleeping while - * waiting for a new buffer to arrive + * waiting for a new buffer to arrive. * @buf_init: called once after allocating a buffer (in MMAP case) * or after acquiring a new USERPTR buffer; drivers may * perform additional buffer-related initialization; * initialization failure (return != 0) will prevent - * queue setup from completing successfully; optional + * queue setup from completing successfully; optional. * @buf_prepare: called every time the buffer is queued from userspace * and from the VIDIOC_PREPARE_BUF ioctl; drivers may - * perform any initialization required before each hardware - * operation in this callback; if an error is returned, the - * buffer will not be queued in driver; optional + * perform any initialization required before each + * hardware operation in this callback; drivers can + * access/modify the buffer here as it is still synced for + * the CPU; drivers that support VIDIOC_CREATE_BUFS must + * also validate the buffer size; if an error is returned, + * the buffer will not be queued in driver; optional. * @buf_finish: called before every dequeue of the buffer back to - * userspace; drivers may perform any operations required - * before userspace accesses the buffer; optional + * userspace; the buffer is synced for the CPU, so drivers + * can access/modify the buffer contents; drivers may + * perform any operations required before userspace + * accesses the buffer; optional. The buffer state can be + * one of the following: DONE and ERROR occur while + * streaming is in progress, and the PREPARED state occurs + * when the queue has been canceled and all pending + * buffers are being returned to their default DEQUEUED + * state. Typically you only have to do something if the + * state is VB2_BUF_STATE_DONE, since in all other cases + * the buffer contents will be ignored anyway. * @buf_cleanup: called once before the buffer is freed; drivers may - * perform any additional cleanup; optional + * perform any additional cleanup; optional. * @start_streaming: called once to enter 'streaming' state; the driver may * receive buffers with @buf_queue callback before * @start_streaming is called; the driver gets the number * of already queued buffers in count parameter; driver - * can return an error if hardware fails or not enough - * buffers has been queued, in such case all buffers that - * have been already given by the @buf_queue callback are - * invalidated. + * can return an error if hardware fails, in that case all + * buffers that have been already given by the @buf_queue + * callback are to be returned by the driver by calling + * @vb2_buffer_done(VB2_BUF_STATE_QUEUED). + * If you need a minimum number of buffers before you can + * start streaming, then set @min_buffers_needed in the + * vb2_queue structure. If that is non-zero then + * start_streaming won't be called until at least that + * many buffers have been queued up by userspace. * @stop_streaming: called when 'streaming' state must be disabled; driver * should stop any DMA transactions or wait until they * finish and give back all buffers it got from buf_queue() - * callback; may use vb2_wait_for_all_buffers() function + * callback by calling @vb2_buffer_done() with either + * VB2_BUF_STATE_DONE or VB2_BUF_STATE_ERROR; may use + * vb2_wait_for_all_buffers() function * @buf_queue: passes buffer vb to the driver; driver may start * hardware operation on this buffer; driver should give * the buffer back by calling vb2_buffer_done() function; * it is allways called after calling STREAMON ioctl; * might be called before start_streaming callback if user - * pre-queued buffers before calling STREAMON + * pre-queued buffers before calling STREAMON. */ struct vb2_ops { - int (*queue_setup)(struct vb2_queue *q, const struct v4l2_format *fmt, + int (*queue_setup)(struct vb2_queue *q, const void *parg, unsigned int *num_buffers, unsigned int *num_planes, unsigned int sizes[], void *alloc_ctxs[]); @@ -272,23 +353,33 @@ int (*buf_init)(struct vb2_buffer *vb); int (*buf_prepare)(struct vb2_buffer *vb); - int (*buf_finish)(struct vb2_buffer *vb); + void (*buf_finish)(struct vb2_buffer *vb); void (*buf_cleanup)(struct vb2_buffer *vb); int (*start_streaming)(struct vb2_queue *q, unsigned int count); - int (*stop_streaming)(struct vb2_queue *q); + void (*stop_streaming)(struct vb2_queue *q); void (*buf_queue)(struct vb2_buffer *vb); }; -struct v4l2_fh; +struct vb2_buf_ops { + int (*verify_planes_array)(struct vb2_buffer *vb, const void *pb); + int (*fill_user_buffer)(struct vb2_buffer *vb, void *pb); + int (*fill_vb2_buffer)(struct vb2_buffer *vb, const void *pb, + struct vb2_plane *planes); + int (*set_timestamp)(struct vb2_buffer *vb, const void *pb); +}; /** * struct vb2_queue - a videobuf queue * - * @type: queue type (see V4L2_BUF_TYPE_* in linux/videodev2.h + * @type: private buffer type whose content is defined by the vb2-core + * caller. For example, for V4L2, it should match + * the V4L2_BUF_TYPE_* in include/uapi/linux/videodev2.h * @io_modes: supported io methods (see vb2_io_modes enum) - * @io_flags: additional io flags (see vb2_fileio_flags enum) + * @fileio_read_once: report EOF after reading the first buffer + * @fileio_write_immediately: queue buffer after each write() call + * @allow_zero_bytesused: allow bytesused == 0 to be passed to the driver * @lock: pointer to a mutex that protects the vb2_queue struct. The * driver can set this to a mutex to let the v4l2 core serialize * the queuing ioctls. If the driver wants to handle locking @@ -300,86 +391,138 @@ * drivers to easily associate an owner filehandle with the queue. * @ops: driver-specific callbacks * @mem_ops: memory allocator specific callbacks + * @buf_ops: callbacks to deliver buffer information + * between user-space and kernel-space * @drv_priv: driver private data * @buf_struct_size: size of the driver-specific buffer structure; * "0" indicates the driver doesn't want to use a custom buffer - * structure type, so sizeof(struct vb2_buffer) will is used + * structure type. for example, sizeof(struct vb2_v4l2_buffer) + * will be used for v4l2. + * @timestamp_flags: Timestamp flags; V4L2_BUF_FLAG_TIMESTAMP_* and + * V4L2_BUF_FLAG_TSTAMP_SRC_* * @gfp_flags: additional gfp flags used when allocating the buffers. * Typically this is 0, but it may be e.g. GFP_DMA or __GFP_DMA32 * to force the buffer allocation to a specific memory zone. - * + * @min_buffers_needed: the minimum number of buffers needed before + * start_streaming() can be called. Used when a DMA engine + * cannot be started unless at least this number of buffers + * have been queued into the driver. + */ +/* + * Private elements (won't appear at the DocBook): + * @mmap_lock: private mutex used when buffers are allocated/freed/mmapped * @memory: current memory type used * @bufs: videobuf buffer structures * @num_buffers: number of allocated/used buffers * @queued_list: list of buffers currently queued from userspace - * @queued_count: number of buffers owned by the driver + * @queued_count: number of buffers queued and ready for streaming. + * @owned_by_drv_count: number of buffers owned by the driver * @done_list: list of buffers ready to be dequeued to userspace * @done_lock: lock to protect done_list list * @done_wq: waitqueue for processes waiting for buffers ready to be dequeued * @alloc_ctx: memory type/allocator-specific contexts for each plane * @streaming: current streaming state + * @start_streaming_called: start_streaming() was called successfully and we + * started streaming. + * @error: a fatal error occurred on the queue * @waiting_for_buffers: used in poll() to check if vb2 is still waiting for * buffers. Only set for capture queues if qbuf has not yet been * called since poll() needs to return POLLERR in that situation. + * @is_multiplanar: set if buffer type is multiplanar + * @is_output: set if buffer type is output + * @last_buffer_dequeued: used in poll() and DQBUF to immediately return if the + * last decoded buffer was already dequeued. Set for capture queues + * when a buffer with the V4L2_BUF_FLAG_LAST is dequeued. * @fileio: file io emulator internal data, used only if emulator is active + * @threadio: thread io internal data, used only if thread is active */ struct vb2_queue { - enum v4l2_buf_type type; + unsigned int type; unsigned int io_modes; - unsigned int io_flags; + unsigned fileio_read_once:1; + unsigned fileio_write_immediately:1; + unsigned allow_zero_bytesused:1; + struct mutex *lock; - struct v4l2_fh *owner; + void *owner; const struct vb2_ops *ops; const struct vb2_mem_ops *mem_ops; + const struct vb2_buf_ops *buf_ops; + void *drv_priv; unsigned int buf_struct_size; - u32 timestamp_type; + u32 timestamp_flags; gfp_t gfp_flags; + u32 min_buffers_needed; -/* private: internal use only */ - enum v4l2_memory memory; - struct vb2_buffer *bufs[VIDEO_MAX_FRAME]; + /* private: internal use only */ + struct mutex mmap_lock; + unsigned int memory; + struct vb2_buffer *bufs[VB2_MAX_FRAME]; unsigned int num_buffers; struct list_head queued_list; + unsigned int queued_count; - atomic_t queued_count; + atomic_t owned_by_drv_count; struct list_head done_list; spinlock_t done_lock; wait_queue_head_t done_wq; - void *alloc_ctx[VIDEO_MAX_PLANES]; - unsigned int plane_sizes[VIDEO_MAX_PLANES]; + void *alloc_ctx[VB2_MAX_PLANES]; + unsigned int plane_sizes[VB2_MAX_PLANES]; unsigned int streaming:1; + unsigned int start_streaming_called:1; + unsigned int error:1; unsigned int waiting_for_buffers:1; + unsigned int is_multiplanar:1; + unsigned int is_output:1; + unsigned int last_buffer_dequeued:1; struct vb2_fileio_data *fileio; + struct vb2_threadio_data *threadio; + +#ifdef CONFIG_VIDEO_ADV_DEBUG + /* + * Counters for how often these queue-related ops are + * called. Used to check for unbalanced ops. + */ + u32 cnt_queue_setup; + u32 cnt_wait_prepare; + u32 cnt_wait_finish; + u32 cnt_start_streaming; + u32 cnt_stop_streaming; +#endif }; void *vb2_plane_vaddr(struct vb2_buffer *vb, unsigned int plane_no); void *vb2_plane_cookie(struct vb2_buffer *vb, unsigned int plane_no); void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state); +void vb2_discard_done(struct vb2_queue *q); int vb2_wait_for_all_buffers(struct vb2_queue *q); -int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b); -int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req); - -int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create); -int vb2_prepare_buf(struct vb2_queue *q, struct v4l2_buffer *b); +int vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb); +int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, + unsigned int *count); +int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, + unsigned int *count, const void *parg); +int vb2_core_prepare_buf(struct vb2_queue *q, unsigned int index, void *pb); +int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb); +int vb2_core_dqbuf(struct vb2_queue *q, void *pb, bool nonblocking); + +int vb2_core_streamon(struct vb2_queue *q, unsigned int type); +int vb2_core_streamoff(struct vb2_queue *q, unsigned int type); -int __must_check vb2_queue_init(struct vb2_queue *q); +int vb2_core_expbuf(struct vb2_queue *q, int *fd, unsigned int type, + unsigned int index, unsigned int plane, unsigned int flags); -void vb2_queue_release(struct vb2_queue *q); +int vb2_core_queue_init(struct vb2_queue *q); +void vb2_core_queue_release(struct vb2_queue *q); -int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b); -int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb); -int vb2_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool nonblocking); - -int vb2_streamon(struct vb2_queue *q, enum v4l2_buf_type type); -int vb2_streamoff(struct vb2_queue *q, enum v4l2_buf_type type); +void vb2_queue_error(struct vb2_queue *q); int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma); #ifndef CONFIG_MMU @@ -389,11 +532,6 @@ unsigned long pgoff, unsigned long flags); #endif -unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait); -size_t vb2_read(struct vb2_queue *q, char __user *data, size_t count, - loff_t *ppos, int nonblock); -size_t vb2_write(struct vb2_queue *q, char __user *data, size_t count, - loff_t *ppos, int nonblock); /** * vb2_is_streaming() - return streaming status of the queue @@ -405,6 +543,23 @@ } /** + * vb2_fileio_is_active() - return true if fileio is active. + * @q: videobuf queue + * + * This returns true if read() or write() is used to stream the data + * as opposed to stream I/O. This is almost never an important distinction, + * except in rare cases. One such case is that using read() or write() to + * stream a format using V4L2_FIELD_ALTERNATE is not allowed since there + * is no way you can pass the field information of each buffer to/from + * userspace. A driver that supports this field format should check for + * this in the queue_setup op and reject it if this function returns true. + */ +static inline bool vb2_fileio_is_active(struct vb2_queue *q) +{ + return q->fileio; +} + +/** * vb2_is_busy() - return busy status of the queue * @q: videobuf queue * @@ -434,20 +589,19 @@ unsigned int plane_no, unsigned long size) { if (plane_no < vb->num_planes) - vb->v4l2_planes[plane_no].bytesused = size; + vb->planes[plane_no].bytesused = size; } /** * vb2_get_plane_payload() - get bytesused for the plane plane_no * @vb: buffer for which plane payload should be set * @plane_no: plane number for which payload should be set - * @size: payload in bytes */ static inline unsigned long vb2_get_plane_payload(struct vb2_buffer *vb, unsigned int plane_no) { if (plane_no < vb->num_planes) - return vb->v4l2_planes[plane_no].bytesused; + return vb->planes[plane_no].bytesused; return 0; } @@ -460,51 +614,26 @@ vb2_plane_size(struct vb2_buffer *vb, unsigned int plane_no) { if (plane_no < vb->num_planes) - return vb->v4l2_planes[plane_no].length; + return vb->planes[plane_no].length; return 0; } -/* - * The following functions are not part of the vb2 core API, but are simple - * helper functions that you can use in your struct v4l2_file_operations, - * struct v4l2_ioctl_ops and struct vb2_ops. They will serialize if vb2_queue->lock - * or video_device->lock is set, and they will set and test vb2_queue->owner - * to check if the calling filehandle is permitted to do the queuing operation. - */ - -/* struct v4l2_ioctl_ops helpers */ - -int vb2_ioctl_reqbufs(struct file *file, void *priv, - struct v4l2_requestbuffers *p); -int vb2_ioctl_create_bufs(struct file *file, void *priv, - struct v4l2_create_buffers *p); -int vb2_ioctl_prepare_buf(struct file *file, void *priv, - struct v4l2_buffer *p); -int vb2_ioctl_querybuf(struct file *file, void *priv, struct v4l2_buffer *p); -int vb2_ioctl_qbuf(struct file *file, void *priv, struct v4l2_buffer *p); -int vb2_ioctl_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p); -int vb2_ioctl_streamon(struct file *file, void *priv, enum v4l2_buf_type i); -int vb2_ioctl_streamoff(struct file *file, void *priv, enum v4l2_buf_type i); -int vb2_ioctl_expbuf(struct file *file, void *priv, - struct v4l2_exportbuffer *p); - -/* struct v4l2_file_operations helpers */ - -int vb2_fop_mmap(struct file *file, struct vm_area_struct *vma); -int vb2_fop_release(struct file *file); -ssize_t vb2_fop_write(struct file *file, char __user *buf, - size_t count, loff_t *ppos); -ssize_t vb2_fop_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos); -unsigned int vb2_fop_poll(struct file *file, poll_table *wait); -#ifndef CONFIG_MMU -unsigned long vb2_fop_get_unmapped_area(struct file *file, unsigned long addr, - unsigned long len, unsigned long pgoff, unsigned long flags); -#endif - -/* struct vb2_ops helpers, only use if vq->lock is non-NULL. */ +/** + * vb2_start_streaming_called() - return streaming status of driver + * @q: videobuf queue + */ +static inline bool vb2_start_streaming_called(struct vb2_queue *q) +{ + return q->start_streaming_called; +} -void vb2_ops_wait_prepare(struct vb2_queue *vq); -void vb2_ops_wait_finish(struct vb2_queue *vq); +/** + * vb2_clear_last_buffer_dequeued() - clear last buffer dequeued flag of queue + * @q: videobuf queue + */ +static inline void vb2_clear_last_buffer_dequeued(struct vb2_queue *q) +{ + q->last_buffer_dequeued = false; +} #endif /* _MEDIA_VIDEOBUF2_CORE_H */