diff options
Diffstat (limited to 'drivers/media/v4l2-core/videobuf2-v4l2.c')
| -rw-r--r-- | drivers/media/v4l2-core/videobuf2-v4l2.c | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-v4l2.c b/drivers/media/v4l2-core/videobuf2-v4l2.c index 9cfbb6e4bc28..52ef8833f6b6 100644 --- a/drivers/media/v4l2-core/videobuf2-v4l2.c +++ b/drivers/media/v4l2-core/videobuf2-v4l2.c @@ -483,13 +483,6 @@ int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b) } EXPORT_SYMBOL(vb2_querybuf); -/** - * vb2_reqbufs() - Wrapper for vb2_core_reqbufs() that also verifies - * the memory and type values. - * @q: videobuf2 queue - * @req: struct passed from userspace to vidioc_reqbufs handler - * in driver - */ int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req) { int ret = vb2_verify_memory_type(q, req->memory, req->type); @@ -498,21 +491,6 @@ int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req) } EXPORT_SYMBOL_GPL(vb2_reqbufs); -/** - * vb2_prepare_buf() - Pass ownership of a buffer from userspace to the kernel - * @q: videobuf2 queue - * @b: buffer structure passed from userspace to vidioc_prepare_buf - * handler in driver - * - * Should be called from vidioc_prepare_buf ioctl handler of a driver. - * This function: - * 1) verifies the passed buffer, - * 2) calls buf_prepare callback in the driver (if provided), in which - * driver-specific buffer initialization can be performed, - * - * The return values from this function are intended to be directly returned - * from vidioc_prepare_buf handler in driver. - */ int vb2_prepare_buf(struct vb2_queue *q, struct v4l2_buffer *b) { int ret; @@ -528,13 +506,6 @@ int vb2_prepare_buf(struct vb2_queue *q, struct v4l2_buffer *b) } EXPORT_SYMBOL_GPL(vb2_prepare_buf); -/** - * vb2_create_bufs() - Wrapper for vb2_core_create_bufs() that also verifies - * the memory and type values. - * @q: videobuf2 queue - * @create: creation parameters, passed from userspace to vidioc_create_bufs - * handler in driver - */ int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create) { unsigned requested_planes = 1; @@ -586,23 +557,6 @@ int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create) } EXPORT_SYMBOL_GPL(vb2_create_bufs); -/** - * vb2_qbuf() - Queue a buffer from userspace - * @q: videobuf2 queue - * @b: buffer structure passed from userspace to vidioc_qbuf handler - * in driver - * - * Should be called from vidioc_qbuf ioctl handler of a driver. - * This function: - * 1) verifies the passed buffer, - * 2) if necessary, calls buf_prepare callback in the driver (if provided), in - * which driver-specific buffer initialization can be performed, - * 3) if streaming is on, queues the buffer in driver by the means of buf_queue - * callback for processing. - * - * The return values from this function are intended to be directly returned - * from vidioc_qbuf handler in driver. - */ int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b) { int ret; @@ -617,27 +571,6 @@ int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b) } EXPORT_SYMBOL_GPL(vb2_qbuf); -/** - * vb2_dqbuf() - Dequeue a buffer to the userspace - * @q: videobuf2 queue - * @b: buffer structure passed from userspace to vidioc_dqbuf handler - * in driver - * @nonblocking: if true, this call will not sleep waiting for a buffer if no - * buffers ready for dequeuing are present. Normally the driver - * would be passing (file->f_flags & O_NONBLOCK) here - * - * Should be called from vidioc_dqbuf ioctl handler of a driver. - * This function: - * 1) verifies the passed buffer, - * 2) calls buf_finish callback in the driver (if provided), in which - * driver can perform any additional operations that may be required before - * returning the buffer to userspace, such as cache sync, - * 3) the buffer struct members are filled with relevant information for - * the userspace. - * - * The return values from this function are intended to be directly returned - * from vidioc_dqbuf handler in driver. - */ int vb2_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool nonblocking) { int ret; @@ -664,19 +597,6 @@ int vb2_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool nonblocking) } EXPORT_SYMBOL_GPL(vb2_dqbuf); -/** - * vb2_streamon - start streaming - * @q: videobuf2 queue - * @type: type argument passed from userspace to vidioc_streamon handler - * - * Should be called from vidioc_streamon handler of a driver. - * This function: - * 1) verifies current state - * 2) passes any previously queued buffers to the driver and starts streaming - * - * The return values from this function are intended to be directly returned - * from vidioc_streamon handler in the driver. - */ int vb2_streamon(struct vb2_queue *q, enum v4l2_buf_type type) { if (vb2_fileio_is_active(q)) { @@ -687,21 +607,6 @@ int vb2_streamon(struct vb2_queue *q, enum v4l2_buf_type type) } EXPORT_SYMBOL_GPL(vb2_streamon); -/** - * vb2_streamoff - stop streaming - * @q: videobuf2 queue - * @type: type argument passed from userspace to vidioc_streamoff handler - * - * Should be called from vidioc_streamoff handler of a driver. - * This function: - * 1) verifies current state, - * 2) stop streaming and dequeues any queued buffers, including those previously - * passed to the driver (after waiting for the driver to finish). - * - * This call can be used for pausing playback. - * The return values from this function are intended to be directly returned - * from vidioc_streamoff handler in the driver - */ int vb2_streamoff(struct vb2_queue *q, enum v4l2_buf_type type) { if (vb2_fileio_is_active(q)) { @@ -712,15 +617,6 @@ int vb2_streamoff(struct vb2_queue *q, enum v4l2_buf_type type) } EXPORT_SYMBOL_GPL(vb2_streamoff); -/** - * vb2_expbuf() - Export a buffer as a file descriptor - * @q: videobuf2 queue - * @eb: export buffer structure passed from userspace to vidioc_expbuf - * handler in driver - * - * The return values from this function are intended to be directly returned - * from vidioc_expbuf handler in driver. - */ int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb) { return vb2_core_expbuf(q, &eb->fd, eb->type, eb->index, @@ -728,17 +624,6 @@ int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb) } EXPORT_SYMBOL_GPL(vb2_expbuf); -/** - * vb2_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 - * 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 - * to the struct vb2_queue description in include/media/videobuf2-core.h - * for more information. - */ int vb2_queue_init(struct vb2_queue *q) { /* @@ -779,39 +664,12 @@ int vb2_queue_init(struct vb2_queue *q) } EXPORT_SYMBOL_GPL(vb2_queue_init); -/** - * vb2_queue_release() - stop streaming, release the queue and free memory - * @q: videobuf2 queue - * - * This function stops streaming and performs necessary clean ups, including - * freeing video buffer memory. The driver is responsible for freeing - * the vb2_queue structure itself. - */ void vb2_queue_release(struct vb2_queue *q) { vb2_core_queue_release(q); } EXPORT_SYMBOL_GPL(vb2_queue_release); -/** - * vb2_poll() - implements poll userspace operation - * @q: videobuf2 queue - * @file: file argument passed to the poll file operation handler - * @wait: wait argument passed to the poll file operation handler - * - * This function implements poll file operation handler for a driver. - * For CAPTURE queues, if a buffer is ready to be dequeued, the userspace will - * be informed that the file descriptor of a video device is available for - * reading. - * For OUTPUT queues, if a buffer is ready to be dequeued, the file descriptor - * will be reported as available for writing. - * - * If the driver uses struct v4l2_fh, then vb2_poll() will also check for any - * pending events. - * - * The return values from this function are intended to be directly returned - * from poll handler in driver. - */ unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait) { struct video_device *vfd = video_devdata(file); |