/**
* 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)
{
/*
* Sanity check
*/
if (WARN_ON(!q) ||
WARN_ON(q->timestamp_flags &
~(V4L2_BUF_FLAG_TIMESTAMP_MASK |
V4L2_BUF_FLAG_TSTAMP_SRC_MASK)))
return -EINVAL;
/* Warn that the driver should choose an appropriate timestamp type */
WARN_ON((q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) ==
V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN);
/* Warn that vb2_memory should match with v4l2_memory */
if (WARN_ON(VB2_MEMORY_MMAP != (int)V4L2_MEMORY_MMAP)
|| WARN_ON(VB2_MEMORY_USERPTR != (int)V4L2_MEMORY_USERPTR)
|| WARN_ON(VB2_MEMORY_DMABUF != (int)V4L2_MEMORY_DMABUF))
return -EINVAL;
if (q->buf_struct_size == 0)
q->buf_struct_size = sizeof(struct vb2_v4l2_buffer);
q->buf_ops = &v4l2_buf_ops;
q->is_multiplanar = V4L2_TYPE_IS_MULTIPLANAR(q->type);
q->is_output = V4L2_TYPE_IS_OUTPUT(q->type);
q->copy_timestamp = (q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK)
== V4L2_BUF_FLAG_TIMESTAMP_COPY;
return vb2_core_queue_init(q);
}
/**
* 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)
{
/*
* Sanity check
*/
if (WARN_ON(!q) ||
WARN_ON(q->timestamp_flags &
~(V4L2_BUF_FLAG_TIMESTAMP_MASK |
V4L2_BUF_FLAG_TSTAMP_SRC_MASK)))
return -EINVAL;
/* Warn that the driver should choose an appropriate timestamp type */
WARN_ON((q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) ==
V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN);
/* Warn that vb2_memory should match with v4l2_memory */
if (WARN_ON(VB2_MEMORY_MMAP != (int)V4L2_MEMORY_MMAP)
|| WARN_ON(VB2_MEMORY_USERPTR != (int)V4L2_MEMORY_USERPTR)
|| WARN_ON(VB2_MEMORY_DMABUF != (int)V4L2_MEMORY_DMABUF))
return -EINVAL;
if (q->buf_struct_size == 0)
q->buf_struct_size = sizeof(struct vb2_v4l2_buffer);
q->buf_ops = &v4l2_buf_ops;
q->is_multiplanar = V4L2_TYPE_IS_MULTIPLANAR(q->type);
q->is_output = V4L2_TYPE_IS_OUTPUT(q->type);
q->copy_timestamp = (q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK)
== V4L2_BUF_FLAG_TIMESTAMP_COPY;
/*
* For compatibility with vb1: if QBUF hasn't been called yet, then
* return POLLERR as well. This only affects capture queues, output
* queues will always initialize waiting_for_buffers to false.
*/
q->quirk_poll_must_check_waiting_for_buffers = true;
return vb2_core_queue_init(q);
}
/*
* Videobuf operations
*/
int dvb_vb2_init(struct dvb_vb2_ctx *ctx, const char *name, int nonblocking)
{
struct vb2_queue *q = &ctx->vb_q;
int ret;
memset(ctx, 0, sizeof(struct dvb_vb2_ctx));
q->type = DVB_BUF_TYPE_CAPTURE;
/**capture type*/
q->is_output = 0;
/**only mmap is supported currently*/
q->io_modes = VB2_MMAP;
q->drv_priv = ctx;
q->buf_struct_size = sizeof(struct dvb_buffer);
q->min_buffers_needed = 1;
q->ops = &dvb_vb2_qops;
q->mem_ops = &vb2_vmalloc_memops;
q->buf_ops = &dvb_vb2_buf_ops;
q->num_buffers = 0;
ret = vb2_core_queue_init(q);
if (ret) {
ctx->state = DVB_VB2_STATE_NONE;
dprintk(1, "[%s] errno=%d\n", ctx->name, ret);
return ret;
}
mutex_init(&ctx->mutex);
spin_lock_init(&ctx->slock);
INIT_LIST_HEAD(&ctx->dvb_q);
strscpy(ctx->name, name, DVB_VB2_NAME_MAX);
ctx->nonblocking = nonblocking;
ctx->state = DVB_VB2_STATE_INIT;
dprintk(3, "[%s]\n", ctx->name);
return 0;
}
