q->ops->queue_setup此函数允许我们的驱动函数自定义分配空间的大小 __vb2_queue_alloc 分配vivi_buffer结构体的空间(缓存区头部信息), 如果使用的是V4L2_MEMORY_MMAP类型则 调用==>__vb2_buf_mem_alloc ==> q->mem_ops->alloc 即vb2_vmalloc_alloc 分配空间,将分配的空间指向vb2_buffer->planes[0].mem_...
this patch moves the initialization of vb2 queue and the DMA context to probe() and clean up in remove() callback respectively. Signed-off-by: Lad, Prabhakar <prabhakar.cse...@gmail.com> --- drivers/media/platform/davinci/vpbe_display.c | 128 +++++++--- 1 file changed, 60 insertio...
* The vb2 queue ops. */ static const struct vb2_ops skel_qops = { .queue_setup = queue_setup, .buf_prepare = buffer_prepare, .buf_queue = buffer_queue, .start_streaming = start_streaming, .stop_streaming = stop_streaming, .wait_prepare = vb2_ops_wait_prepare, ...
this patch drops setting of vb2 buffer state to VB2_BUF_STATE_ACTIVE, as any buffer queued to the driver is marked ACTIVE by the vb2 core.
void fun(queue Q) { stack S; // Say it creates an empty stack S // Run while Q is not empty while (!Q.empty()) { S.push(Q.front()); Q.pop(); } // Run while Stack S i... A. 将队列中的最后一个元素删除 B. 保持Q中的内容不变 C. 清空Q中的内容 D. ...
static int msm_vb2_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt, unsigned int *num_buffers, unsigned int *num_planes, unsigned int sizes[], void *alloc_ctxs[]) { for (i = 0; i < data->num_planes; i++) ...
All the above-mentioned algorithms have optimal queue length. These algorithms also extend to higher-dimensional meshes. 展开 关键词: Connected parallel computers Algorithms DOI: 10.1006/JAGM.1995.1042 年份: 1995 收藏 引用 批量引用 报错 分享 ...
In the method, incoming data units are received and stored in a logical queue in a buffer (BF) comprising a plurality of memory... K Kilkki - EP 被引量: 7发表: 1998年 METHOD FOR AN IMPROVED TRAFFIC SHAPING AND/OR MANAGEMENT OF IP TRAFFIC IN A PACKET PROCESSING SYSTEM, ...
this patch makes use of vb2_ops_wait_prepare/finish helper functions. Signed-off-by: Lad, Prabhakar <prabhakar.cse...@gmail.com> --- drivers/media/platform/davinci/vpbe_display.c | 20 +++--- 1 file changed, 3 insertions(+), 17 deletions(-)...