diff options
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/v4l2-mem2mem.h | 93 |
1 files changed, 80 insertions, 13 deletions
diff --git a/include/media/v4l2-mem2mem.h b/include/media/v4l2-mem2mem.h index e5449a2c8475..00410bd14772 100644 --- a/include/media/v4l2-mem2mem.h +++ b/include/media/v4l2-mem2mem.h @@ -97,11 +97,16 @@ struct v4l2_m2m_buffer { /** * v4l2_m2m_get_curr_priv() - return driver private data for the currently * running instance or NULL if no instance is running + * + * @m2m_dev: pointer to struct &v4l2_m2m_dev */ void *v4l2_m2m_get_curr_priv(struct v4l2_m2m_dev *m2m_dev); /** * v4l2_m2m_get_vq() - return vb2_queue for the given type + * + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * @type: type of the V4L2 buffer, as defined by enum &v4l2_buf_type */ struct vb2_queue *v4l2_m2m_get_vq(struct v4l2_m2m_ctx *m2m_ctx, enum v4l2_buf_type type); @@ -109,7 +114,8 @@ struct vb2_queue *v4l2_m2m_get_vq(struct v4l2_m2m_ctx *m2m_ctx, /** * v4l2_m2m_try_schedule() - check whether an instance is ready to be added to * the pending job queue and add it if so. - * @m2m_ctx: m2m context assigned to the instance to be checked + * + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * * There are three basic requirements an instance has to meet to be able to run: * 1) at least one source buffer has to be queued, @@ -132,6 +138,9 @@ void v4l2_m2m_try_schedule(struct v4l2_m2m_ctx *m2m_ctx); * v4l2_m2m_job_finish() - inform the framework that a job has been finished * and have it clean up * + * @m2m_dev: pointer to struct &v4l2_m2m_dev + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * * Called by a driver to yield back the device after it has finished with it. * Should be called as soon as possible after reaching a state which allows * other instances to take control of the device. @@ -151,6 +160,10 @@ v4l2_m2m_buf_done(struct vb2_v4l2_buffer *buf, enum vb2_buffer_state state) /** * v4l2_m2m_reqbufs() - multi-queue-aware REQBUFS multiplexer + * + * @file: pointer to struct &file + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * @reqbufs: pointer to struct &v4l2_requestbuffers */ int v4l2_m2m_reqbufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_requestbuffers *reqbufs); @@ -158,6 +171,10 @@ int v4l2_m2m_reqbufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, /** * v4l2_m2m_querybuf() - multi-queue-aware QUERYBUF multiplexer * + * @file: pointer to struct &file + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * @buf: pointer to struct &v4l2_buffer + * * See v4l2_m2m_mmap() documentation for details. */ int v4l2_m2m_querybuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, @@ -166,6 +183,10 @@ int v4l2_m2m_querybuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, /** * v4l2_m2m_qbuf() - enqueue a source or destination buffer, depending on * the type + * + * @file: pointer to struct &file + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * @buf: pointer to struct &v4l2_buffer */ int v4l2_m2m_qbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_buffer *buf); @@ -173,6 +194,10 @@ int v4l2_m2m_qbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, /** * v4l2_m2m_dqbuf() - dequeue a source or destination buffer, depending on * the type + * + * @file: pointer to struct &file + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * @buf: pointer to struct &v4l2_buffer */ int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_buffer *buf); @@ -180,6 +205,10 @@ int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, /** * v4l2_m2m_prepare_buf() - prepare a source or destination buffer, depending on * the type + * + * @file: pointer to struct &file + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * @buf: pointer to struct &v4l2_buffer */ int v4l2_m2m_prepare_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_buffer *buf); @@ -187,6 +216,10 @@ int v4l2_m2m_prepare_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, /** * v4l2_m2m_create_bufs() - create a source or destination buffer, depending * on the type + * + * @file: pointer to struct &file + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * @create: pointer to struct &v4l2_create_buffers */ int v4l2_m2m_create_bufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_create_buffers *create); @@ -194,18 +227,30 @@ int v4l2_m2m_create_bufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, /** * v4l2_m2m_expbuf() - export a source or destination buffer, depending on * the type + * + * @file: pointer to struct &file + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * @eb: pointer to struct &v4l2_exportbuffer */ int v4l2_m2m_expbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_exportbuffer *eb); /** * v4l2_m2m_streamon() - turn on streaming for a video queue + * + * @file: pointer to struct &file + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * @type: type of the V4L2 buffer, as defined by enum &v4l2_buf_type */ int v4l2_m2m_streamon(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, enum v4l2_buf_type type); /** * v4l2_m2m_streamoff() - turn off streaming for a video queue + * + * @file: pointer to struct &file + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * @type: type of the V4L2 buffer, as defined by enum &v4l2_buf_type */ int v4l2_m2m_streamoff(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, enum v4l2_buf_type type); @@ -213,6 +258,10 @@ int v4l2_m2m_streamoff(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, /** * v4l2_m2m_poll() - poll replacement, for destination buffers only * + * @file: pointer to struct &file + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * @wait: pointer to struct &poll_table_struct + * * Call from the driver's poll() function. Will poll both queues. If a buffer * is available to dequeue (with dqbuf) from the source queue, this will * indicate that a non-blocking write can be performed, while read will be @@ -224,6 +273,10 @@ unsigned int v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, /** * v4l2_m2m_mmap() - source and destination queues-aware mmap multiplexer * + * @file: pointer to struct &file + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * @vma: pointer to struct &vm_area_struct + * * Call from driver's mmap() function. Will handle mmap() for both queues * seamlessly for videobuffer, which will receive normal per-queue offsets and * proper videobuf queue pointers. The differentiation is made outside videobuf @@ -237,6 +290,8 @@ int v4l2_m2m_mmap(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, /** * v4l2_m2m_init() - initialize per-driver m2m data * + * @m2m_ops: pointer to struct v4l2_m2m_ops + * * Usually called from driver's probe() function. */ struct v4l2_m2m_dev *v4l2_m2m_init(const struct v4l2_m2m_ops *m2m_ops); @@ -244,16 +299,19 @@ struct v4l2_m2m_dev *v4l2_m2m_init(const struct v4l2_m2m_ops *m2m_ops); /** * v4l2_m2m_release() - cleans up and frees a m2m_dev structure * + * @m2m_dev: pointer to struct &v4l2_m2m_dev + * * Usually called from driver's remove() function. */ void v4l2_m2m_release(struct v4l2_m2m_dev *m2m_dev); /** * v4l2_m2m_ctx_init() - allocate and initialize a m2m context - * @priv - driver's instance private data - * @m2m_dev - a previously initialized m2m_dev struct - * @vq_init - a callback for queue type-specific initialization function to be - * used for initializing videobuf_queues + * + * @m2m_dev: a previously initialized m2m_dev struct + * @drv_priv: driver's instance private data + * @queue_init: a callback for queue type-specific initialization function + * to be used for initializing videobuf_queues * * Usually called from driver's open() function. */ @@ -276,6 +334,8 @@ static inline void v4l2_m2m_set_dst_buffered(struct v4l2_m2m_ctx *m2m_ctx, /** * v4l2_m2m_ctx_release() - release m2m context * + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * * Usually called from driver's release() function. */ void v4l2_m2m_ctx_release(struct v4l2_m2m_ctx *m2m_ctx); @@ -283,6 +343,9 @@ void v4l2_m2m_ctx_release(struct v4l2_m2m_ctx *m2m_ctx); /** * v4l2_m2m_buf_queue() - add a buffer to the proper ready buffers list. * + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx + * @vbuf: pointer to struct &vb2_v4l2_buffer + * * Call from buf_queue(), videobuf_queue_ops callback. */ void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx, @@ -292,7 +355,7 @@ void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx, * v4l2_m2m_num_src_bufs_ready() - return the number of source buffers ready for * use * - * @m2m_ctx: pointer to struct v4l2_m2m_ctx + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx */ static inline unsigned int v4l2_m2m_num_src_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx) @@ -304,7 +367,7 @@ unsigned int v4l2_m2m_num_src_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx) * v4l2_m2m_num_src_bufs_ready() - return the number of destination buffers * ready for use * - * @m2m_ctx: pointer to struct v4l2_m2m_ctx + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx */ static inline unsigned int v4l2_m2m_num_dst_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx) @@ -314,6 +377,8 @@ unsigned int v4l2_m2m_num_dst_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx) /** * v4l2_m2m_next_buf() - return next buffer from the list of ready buffers + * + * @q_ctx: pointer to struct @v4l2_m2m_queue_ctx */ void *v4l2_m2m_next_buf(struct v4l2_m2m_queue_ctx *q_ctx); @@ -321,7 +386,7 @@ void *v4l2_m2m_next_buf(struct v4l2_m2m_queue_ctx *q_ctx); * v4l2_m2m_next_src_buf() - return next source buffer from the list of ready * buffers * - * @m2m_ctx: pointer to struct v4l2_m2m_ctx + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx */ static inline void *v4l2_m2m_next_src_buf(struct v4l2_m2m_ctx *m2m_ctx) { @@ -332,7 +397,7 @@ static inline void *v4l2_m2m_next_src_buf(struct v4l2_m2m_ctx *m2m_ctx) * v4l2_m2m_next_dst_buf() - return next destination buffer from the list of * ready buffers * - * @m2m_ctx: pointer to struct v4l2_m2m_ctx + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx */ static inline void *v4l2_m2m_next_dst_buf(struct v4l2_m2m_ctx *m2m_ctx) { @@ -342,7 +407,7 @@ static inline void *v4l2_m2m_next_dst_buf(struct v4l2_m2m_ctx *m2m_ctx) /** * v4l2_m2m_get_src_vq() - return vb2_queue for source buffers * - * @m2m_ctx: pointer to struct v4l2_m2m_ctx + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx */ static inline struct vb2_queue *v4l2_m2m_get_src_vq(struct v4l2_m2m_ctx *m2m_ctx) @@ -353,7 +418,7 @@ struct vb2_queue *v4l2_m2m_get_src_vq(struct v4l2_m2m_ctx *m2m_ctx) /** * v4l2_m2m_get_dst_vq() - return vb2_queue for destination buffers * - * @m2m_ctx: pointer to struct v4l2_m2m_ctx + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx */ static inline struct vb2_queue *v4l2_m2m_get_dst_vq(struct v4l2_m2m_ctx *m2m_ctx) @@ -364,6 +429,8 @@ struct vb2_queue *v4l2_m2m_get_dst_vq(struct v4l2_m2m_ctx *m2m_ctx) /** * v4l2_m2m_buf_remove() - take off a buffer from the list of ready buffers and * return it + * + * @q_ctx: pointer to struct @v4l2_m2m_queue_ctx */ void *v4l2_m2m_buf_remove(struct v4l2_m2m_queue_ctx *q_ctx); @@ -371,7 +438,7 @@ void *v4l2_m2m_buf_remove(struct v4l2_m2m_queue_ctx *q_ctx); * v4l2_m2m_src_buf_remove() - take off a source buffer from the list of ready * buffers and return it * - * @m2m_ctx: pointer to struct v4l2_m2m_ctx + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx */ static inline void *v4l2_m2m_src_buf_remove(struct v4l2_m2m_ctx *m2m_ctx) { @@ -382,7 +449,7 @@ static inline void *v4l2_m2m_src_buf_remove(struct v4l2_m2m_ctx *m2m_ctx) * v4l2_m2m_dst_buf_remove() - take off a destination buffer from the list of * ready buffers and return it * - * @m2m_ctx: pointer to struct v4l2_m2m_ctx + * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx */ static inline void *v4l2_m2m_dst_buf_remove(struct v4l2_m2m_ctx *m2m_ctx) { |