[media] v4l2-mem2mem.h: document function arguments
There are lots of troubles with the function arguments on this file. Fix them. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Mauro Carvalho Chehab
parent
4781646c1e
commit
dcbd873589
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@ -97,11 +97,16 @@ struct v4l2_m2m_buffer {
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/**
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* v4l2_m2m_get_curr_priv() - return driver private data for the currently
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* running instance or NULL if no instance is running
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*
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* @m2m_dev: pointer to struct &v4l2_m2m_dev
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*/
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void *v4l2_m2m_get_curr_priv(struct v4l2_m2m_dev *m2m_dev);
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/**
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* v4l2_m2m_get_vq() - return vb2_queue for the given type
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*
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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* @type: type of the V4L2 buffer, as defined by enum &v4l2_buf_type
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*/
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struct vb2_queue *v4l2_m2m_get_vq(struct v4l2_m2m_ctx *m2m_ctx,
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enum v4l2_buf_type type);
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@ -109,7 +114,8 @@ struct vb2_queue *v4l2_m2m_get_vq(struct v4l2_m2m_ctx *m2m_ctx,
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/**
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* v4l2_m2m_try_schedule() - check whether an instance is ready to be added to
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* the pending job queue and add it if so.
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* @m2m_ctx: m2m context assigned to the instance to be checked
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*
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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*
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* There are three basic requirements an instance has to meet to be able to run:
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* 1) at least one source buffer has to be queued,
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@ -132,6 +138,9 @@ void v4l2_m2m_try_schedule(struct v4l2_m2m_ctx *m2m_ctx);
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* v4l2_m2m_job_finish() - inform the framework that a job has been finished
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* and have it clean up
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*
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* @m2m_dev: pointer to struct &v4l2_m2m_dev
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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*
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* Called by a driver to yield back the device after it has finished with it.
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* Should be called as soon as possible after reaching a state which allows
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* other instances to take control of the device.
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@ -151,6 +160,10 @@ v4l2_m2m_buf_done(struct vb2_v4l2_buffer *buf, enum vb2_buffer_state state)
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/**
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* v4l2_m2m_reqbufs() - multi-queue-aware REQBUFS multiplexer
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*
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* @file: pointer to struct &file
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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* @reqbufs: pointer to struct &v4l2_requestbuffers
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*/
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int v4l2_m2m_reqbufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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struct v4l2_requestbuffers *reqbufs);
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@ -158,6 +171,10 @@ int v4l2_m2m_reqbufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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/**
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* v4l2_m2m_querybuf() - multi-queue-aware QUERYBUF multiplexer
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*
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* @file: pointer to struct &file
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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* @buf: pointer to struct &v4l2_buffer
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*
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* See v4l2_m2m_mmap() documentation for details.
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*/
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int v4l2_m2m_querybuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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@ -166,6 +183,10 @@ int v4l2_m2m_querybuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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/**
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* v4l2_m2m_qbuf() - enqueue a source or destination buffer, depending on
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* the type
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*
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* @file: pointer to struct &file
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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* @buf: pointer to struct &v4l2_buffer
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*/
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int v4l2_m2m_qbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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struct v4l2_buffer *buf);
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@ -173,6 +194,10 @@ int v4l2_m2m_qbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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/**
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* v4l2_m2m_dqbuf() - dequeue a source or destination buffer, depending on
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* the type
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*
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* @file: pointer to struct &file
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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* @buf: pointer to struct &v4l2_buffer
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*/
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int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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struct v4l2_buffer *buf);
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@ -180,6 +205,10 @@ int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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/**
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* v4l2_m2m_prepare_buf() - prepare a source or destination buffer, depending on
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* the type
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*
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* @file: pointer to struct &file
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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* @buf: pointer to struct &v4l2_buffer
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*/
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int v4l2_m2m_prepare_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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struct v4l2_buffer *buf);
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@ -187,6 +216,10 @@ int v4l2_m2m_prepare_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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/**
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* v4l2_m2m_create_bufs() - create a source or destination buffer, depending
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* on the type
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*
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* @file: pointer to struct &file
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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* @create: pointer to struct &v4l2_create_buffers
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*/
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int v4l2_m2m_create_bufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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struct v4l2_create_buffers *create);
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@ -194,18 +227,30 @@ int v4l2_m2m_create_bufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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/**
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* v4l2_m2m_expbuf() - export a source or destination buffer, depending on
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* the type
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*
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* @file: pointer to struct &file
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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* @eb: pointer to struct &v4l2_exportbuffer
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*/
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int v4l2_m2m_expbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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struct v4l2_exportbuffer *eb);
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/**
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* v4l2_m2m_streamon() - turn on streaming for a video queue
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*
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* @file: pointer to struct &file
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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* @type: type of the V4L2 buffer, as defined by enum &v4l2_buf_type
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*/
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int v4l2_m2m_streamon(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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enum v4l2_buf_type type);
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/**
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* v4l2_m2m_streamoff() - turn off streaming for a video queue
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*
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* @file: pointer to struct &file
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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* @type: type of the V4L2 buffer, as defined by enum &v4l2_buf_type
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*/
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int v4l2_m2m_streamoff(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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enum v4l2_buf_type type);
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@ -213,6 +258,10 @@ int v4l2_m2m_streamoff(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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/**
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* v4l2_m2m_poll() - poll replacement, for destination buffers only
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*
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* @file: pointer to struct &file
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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* @wait: pointer to struct &poll_table_struct
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*
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* Call from the driver's poll() function. Will poll both queues. If a buffer
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* is available to dequeue (with dqbuf) from the source queue, this will
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* indicate that a non-blocking write can be performed, while read will be
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@ -224,6 +273,10 @@ unsigned int v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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/**
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* v4l2_m2m_mmap() - source and destination queues-aware mmap multiplexer
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*
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* @file: pointer to struct &file
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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* @vma: pointer to struct &vm_area_struct
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*
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* Call from driver's mmap() function. Will handle mmap() for both queues
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* seamlessly for videobuffer, which will receive normal per-queue offsets and
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* proper videobuf queue pointers. The differentiation is made outside videobuf
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@ -237,6 +290,8 @@ int v4l2_m2m_mmap(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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/**
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* v4l2_m2m_init() - initialize per-driver m2m data
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*
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* @m2m_ops: pointer to struct v4l2_m2m_ops
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*
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* Usually called from driver's probe() function.
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*/
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struct v4l2_m2m_dev *v4l2_m2m_init(const struct v4l2_m2m_ops *m2m_ops);
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@ -244,16 +299,19 @@ struct v4l2_m2m_dev *v4l2_m2m_init(const struct v4l2_m2m_ops *m2m_ops);
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/**
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* v4l2_m2m_release() - cleans up and frees a m2m_dev structure
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*
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* @m2m_dev: pointer to struct &v4l2_m2m_dev
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*
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* Usually called from driver's remove() function.
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*/
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void v4l2_m2m_release(struct v4l2_m2m_dev *m2m_dev);
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/**
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* v4l2_m2m_ctx_init() - allocate and initialize a m2m context
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* @priv - driver's instance private data
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* @m2m_dev - a previously initialized m2m_dev struct
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* @vq_init - a callback for queue type-specific initialization function to be
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* used for initializing videobuf_queues
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*
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* @m2m_dev: a previously initialized m2m_dev struct
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* @drv_priv: driver's instance private data
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* @queue_init: a callback for queue type-specific initialization function
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* to be used for initializing videobuf_queues
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*
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* Usually called from driver's open() function.
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*/
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@ -276,6 +334,8 @@ static inline void v4l2_m2m_set_dst_buffered(struct v4l2_m2m_ctx *m2m_ctx,
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/**
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* v4l2_m2m_ctx_release() - release m2m context
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*
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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*
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* Usually called from driver's release() function.
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*/
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void v4l2_m2m_ctx_release(struct v4l2_m2m_ctx *m2m_ctx);
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@ -283,6 +343,9 @@ void v4l2_m2m_ctx_release(struct v4l2_m2m_ctx *m2m_ctx);
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/**
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* v4l2_m2m_buf_queue() - add a buffer to the proper ready buffers list.
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*
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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* @vbuf: pointer to struct &vb2_v4l2_buffer
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*
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* Call from buf_queue(), videobuf_queue_ops callback.
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*/
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void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx,
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@ -292,7 +355,7 @@ void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx,
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* v4l2_m2m_num_src_bufs_ready() - return the number of source buffers ready for
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* use
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*
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* @m2m_ctx: pointer to struct v4l2_m2m_ctx
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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*/
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static inline
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unsigned int v4l2_m2m_num_src_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx)
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@ -304,7 +367,7 @@ unsigned int v4l2_m2m_num_src_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx)
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* v4l2_m2m_num_src_bufs_ready() - return the number of destination buffers
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* ready for use
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*
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* @m2m_ctx: pointer to struct v4l2_m2m_ctx
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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*/
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static inline
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unsigned int v4l2_m2m_num_dst_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx)
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@ -314,6 +377,8 @@ unsigned int v4l2_m2m_num_dst_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx)
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/**
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* v4l2_m2m_next_buf() - return next buffer from the list of ready buffers
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*
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* @q_ctx: pointer to struct @v4l2_m2m_queue_ctx
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*/
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void *v4l2_m2m_next_buf(struct v4l2_m2m_queue_ctx *q_ctx);
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@ -321,7 +386,7 @@ void *v4l2_m2m_next_buf(struct v4l2_m2m_queue_ctx *q_ctx);
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* v4l2_m2m_next_src_buf() - return next source buffer from the list of ready
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* buffers
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*
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* @m2m_ctx: pointer to struct v4l2_m2m_ctx
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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*/
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static inline void *v4l2_m2m_next_src_buf(struct v4l2_m2m_ctx *m2m_ctx)
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{
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@ -332,7 +397,7 @@ static inline void *v4l2_m2m_next_src_buf(struct v4l2_m2m_ctx *m2m_ctx)
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* v4l2_m2m_next_dst_buf() - return next destination buffer from the list of
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* ready buffers
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*
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* @m2m_ctx: pointer to struct v4l2_m2m_ctx
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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*/
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static inline void *v4l2_m2m_next_dst_buf(struct v4l2_m2m_ctx *m2m_ctx)
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{
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@ -342,7 +407,7 @@ static inline void *v4l2_m2m_next_dst_buf(struct v4l2_m2m_ctx *m2m_ctx)
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/**
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* v4l2_m2m_get_src_vq() - return vb2_queue for source buffers
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*
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* @m2m_ctx: pointer to struct v4l2_m2m_ctx
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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*/
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static inline
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struct vb2_queue *v4l2_m2m_get_src_vq(struct v4l2_m2m_ctx *m2m_ctx)
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@ -353,7 +418,7 @@ struct vb2_queue *v4l2_m2m_get_src_vq(struct v4l2_m2m_ctx *m2m_ctx)
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/**
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* v4l2_m2m_get_dst_vq() - return vb2_queue for destination buffers
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*
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* @m2m_ctx: pointer to struct v4l2_m2m_ctx
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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*/
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static inline
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struct vb2_queue *v4l2_m2m_get_dst_vq(struct v4l2_m2m_ctx *m2m_ctx)
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@ -364,6 +429,8 @@ struct vb2_queue *v4l2_m2m_get_dst_vq(struct v4l2_m2m_ctx *m2m_ctx)
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/**
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* v4l2_m2m_buf_remove() - take off a buffer from the list of ready buffers and
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* return it
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*
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* @q_ctx: pointer to struct @v4l2_m2m_queue_ctx
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*/
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void *v4l2_m2m_buf_remove(struct v4l2_m2m_queue_ctx *q_ctx);
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@ -371,7 +438,7 @@ void *v4l2_m2m_buf_remove(struct v4l2_m2m_queue_ctx *q_ctx);
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* v4l2_m2m_src_buf_remove() - take off a source buffer from the list of ready
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* buffers and return it
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*
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* @m2m_ctx: pointer to struct v4l2_m2m_ctx
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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*/
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static inline void *v4l2_m2m_src_buf_remove(struct v4l2_m2m_ctx *m2m_ctx)
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{
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@ -382,7 +449,7 @@ static inline void *v4l2_m2m_src_buf_remove(struct v4l2_m2m_ctx *m2m_ctx)
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* v4l2_m2m_dst_buf_remove() - take off a destination buffer from the list of
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* ready buffers and return it
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*
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* @m2m_ctx: pointer to struct v4l2_m2m_ctx
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
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*/
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static inline void *v4l2_m2m_dst_buf_remove(struct v4l2_m2m_ctx *m2m_ctx)
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{
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