diff options
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/videobuf2-core.h | 59 |
1 files changed, 29 insertions, 30 deletions
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index ef9b64398c8c..5f4df060affb 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -69,7 +69,7 @@ struct vb2_threadio_data; * argument to other ops in this structure. * @put_userptr: inform the allocator that a USERPTR buffer will no longer * be used. - * @attach_dmabuf: attach a shared struct dma_buf for a hardware operation; + * @attach_dmabuf: attach a shared &struct dma_buf for a hardware operation; * used for DMABUF memory types; dev is the alloc device * dbuf is the shared dma_buf; returns ERR_PTR() on failure; * allocator private per-buffer structure on success; @@ -153,20 +153,19 @@ struct vb2_mem_ops { * @length: size of this plane (NOT the payload) in bytes * @min_length: minimum required size of this plane (NOT the payload) in bytes. * @length is always greater or equal to @min_length. - * @offset: when memory in the associated struct vb2_buffer is - * VB2_MEMORY_MMAP, equals the offset from the start of + * @m: Union with memtype-specific data + * @m.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 + * @m.userptr: when memory is %VB2_MEMORY_USERPTR, a userspace pointer * pointing to this plane - * @fd: when memory is VB2_MEMORY_DMABUF, a userspace file + * @m.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 + * of &struct v4l2_plane at videodev2.h */ struct vb2_plane { void *mem_priv; @@ -356,7 +355,7 @@ struct vb2_buffer { * driver 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() with %VB2_BUF_STATE_QUEUED. + * by calling vb2_buffer_done() with %%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 @@ -366,7 +365,7 @@ struct vb2_buffer { * should stop any DMA transactions or wait until they * finish and give back all buffers it got from &buf_queue * callback by calling vb2_buffer_done() with either - * %VB2_BUF_STATE_DONE or %VB2_BUF_STATE_ERROR; may use + * %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 @@ -401,13 +400,13 @@ struct vb2_ops { * @verify_planes_array: Verify that a given user space structure contains * enough planes for the buffer. This is called * for each dequeued buffer. - * @fill_user_buffer: given a vb2_buffer fill in the userspace structure. + * @fill_user_buffer: given a &vb2_buffer fill in the userspace structure. * For V4L2 this is a struct v4l2_buffer. - * @fill_vb2_buffer: given a userspace structure, fill in the vb2_buffer. + * @fill_vb2_buffer: given a userspace structure, fill in the &vb2_buffer. * If the userspace structure is invalid, then this op * will return an error. * @copy_timestamp: copy the timestamp from a userspace structure to - * the vb2_buffer struct. + * the &vb2_buffer struct. */ struct vb2_buf_ops { int (*verify_planes_array)(struct vb2_buffer *vb, const void *pb); @@ -428,10 +427,10 @@ struct vb2_buf_ops { * doesn't fill in the @alloc_devs array. * @dma_attrs: DMA attributes to use for the DMA. * @bidirectional: when this flag is set the DMA direction for the buffers of - * this queue will be overridden with DMA_BIDIRECTIONAL direction. + * this queue will be overridden with %DMA_BIDIRECTIONAL direction. * This is useful in cases where the hardware (firmware) writes to - * a buffer which is mapped as read (DMA_TO_DEVICE), or reads from - * buffer which is mapped for write (DMA_FROM_DEVICE) in order + * a buffer which is mapped as read (%DMA_TO_DEVICE), or reads from + * buffer which is mapped for write (%DMA_FROM_DEVICE) in order * to satisfy some internal hardware restrictions or adds a padding * needed by the processing algorithm. In case the DMA mapping is * not bidirectional but the hardware (firmware) trying to access @@ -440,10 +439,10 @@ struct vb2_buf_ops { * @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 - * @quirk_poll_must_check_waiting_for_buffers: Return POLLERR at poll when QBUF + * @quirk_poll_must_check_waiting_for_buffers: Return %POLLERR at poll when QBUF * has not been called. This is a vb1 idiom that has been adopted * also by vb2. - * @lock: pointer to a mutex that protects the vb2_queue struct. The + * @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 * itself, then this should be set to NULL. This lock is not used @@ -464,7 +463,7 @@ struct vb2_buf_ops { * @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 + * 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 @@ -491,13 +490,13 @@ struct vb2_buf_ops { * @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. + * 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 * @copy_timestamp: set if vb2-core should set timestamps * @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. + * 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 */ @@ -569,7 +568,7 @@ struct vb2_queue { /** * vb2_plane_vaddr() - Return a kernel virtual address of a given plane - * @vb: vb2_buffer to which the plane in question belongs to + * @vb: &vb2_buffer to which the plane in question belongs to * @plane_no: plane number for which the address is to be returned * * This function returns a kernel virtual address of a given plane if @@ -579,7 +578,7 @@ void *vb2_plane_vaddr(struct vb2_buffer *vb, unsigned int plane_no); /** * vb2_plane_cookie() - Return allocator specific cookie for the given plane - * @vb: vb2_buffer to which the plane in question belongs to + * @vb: &vb2_buffer to which the plane in question belongs to * @plane_no: plane number for which the cookie is to be returned * * This function returns an allocator specific cookie for a given plane if @@ -644,7 +643,7 @@ int vb2_wait_for_all_buffers(struct vb2_queue *q); * @index: id number of the buffer * @pb: buffer struct passed from userspace * - * Should be called from vidioc_querybuf ioctl handler in driver. + * Should be called from &vidioc_querybuf ioctl handler in driver. * The passed buffer should have been verified. * This function fills the relevant information for the userspace. */ @@ -656,7 +655,7 @@ void vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb); * @memory: memory type * @count: requested buffer count * - * Should be called from vidioc_reqbufs ioctl handler of a driver. + * Should be called from &vidioc_reqbufs ioctl handler of a driver. * * This function: * @@ -664,7 +663,7 @@ void vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb); * #) sets up the queue, * #) negotiates number of buffers and planes per buffer with the driver * to be used during streaming, - * #) allocates internal buffer structures (struct vb2_buffer), according to + * #) allocates internal buffer structures (&struct vb2_buffer), according to * the agreed parameters, * #) for MMAP memory type, allocates actual video memory, using the * memory handling/allocation routines provided during queue initialization @@ -779,7 +778,7 @@ int vb2_core_streamoff(struct vb2_queue *q, unsigned int type); * @type: buffer type * @index: id number of the buffer * @plane: index of the plane to be exported, 0 for single plane queues - * @flags: flags for newly created file, currently only O_CLOEXEC is + * @flags: flags for newly created file, currently only %O_CLOEXEC is * supported, refer to manual of open syscall for more details * * The return values from this function are intended to be directly returned @@ -792,7 +791,7 @@ int vb2_core_expbuf(struct vb2_queue *q, int *fd, unsigned int type, * vb2_core_queue_init() - initialize a videobuf2 queue * @q: videobuf2 queue; this structure should be allocated in driver * - * The vb2_queue structure should be allocated by the driver. The driver is + * The &vb2_queue structure should be allocated by the driver. The driver is * responsible of clearing it's content and setting initial values for some * required entries before calling this function. * q->ops, q->mem_ops, q->type and q->io_modes are mandatory. Please refer @@ -819,8 +818,8 @@ void vb2_core_queue_release(struct vb2_queue *q); * waiting on the queue. Polling will now set POLLERR and queuing and dequeuing * buffers will return -EIO. * - * The error flag will be cleared when cancelling the queue, either from - * vb2_streamoff or vb2_queue_release. Drivers should thus not call this + * The error flag will be cleared when canceling the queue, either from + * vb2_streamoff() or vb2_queue_release(). Drivers should thus not call this * function before starting the stream, otherwise the error flag will remain set * until the queue is released when closing the device node. */ |