Lines Matching refs:queue
25 * Video buffers queue management.
31 * the videobuf2 queue operations by serializing calls to videobuf2 and a
32 * spinlock to protect the IRQ queue that holds the buffers to be processed by
37 * videobuf2 queue operations
44 struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
45 struct uvc_video *video = container_of(queue, struct uvc_video, queue);
59 struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
69 if (unlikely(queue->flags & UVC_QUEUE_DISCONNECTED))
85 struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
90 spin_lock_irqsave(&queue->irqlock, flags);
92 if (likely(!(queue->flags & UVC_QUEUE_DISCONNECTED))) {
93 list_add_tail(&buf->queue, &queue->irqqueue);
102 spin_unlock_irqrestore(&queue->irqlock, flags);
113 int uvcg_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
118 queue->queue.type = type;
119 queue->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
120 queue->queue.drv_priv = queue;
121 queue->queue.buf_struct_size = sizeof(struct uvc_buffer);
122 queue->queue.ops = &uvc_queue_qops;
123 queue->queue.lock = lock;
124 queue->queue.mem_ops = &vb2_vmalloc_memops;
125 queue->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
127 ret = vb2_queue_init(&queue->queue);
131 spin_lock_init(&queue->irqlock);
132 INIT_LIST_HEAD(&queue->irqqueue);
133 queue->flags = 0;
141 void uvcg_free_buffers(struct uvc_video_queue *queue)
143 vb2_queue_release(&queue->queue);
149 int uvcg_alloc_buffers(struct uvc_video_queue *queue,
154 ret = vb2_reqbufs(&queue->queue, rb);
159 int uvcg_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf)
161 return vb2_querybuf(&queue->queue, buf);
164 int uvcg_queue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf)
169 ret = vb2_qbuf(&queue->queue, NULL, buf);
173 spin_lock_irqsave(&queue->irqlock, flags);
174 ret = (queue->flags & UVC_QUEUE_PAUSED) != 0;
175 queue->flags &= ~UVC_QUEUE_PAUSED;
176 spin_unlock_irqrestore(&queue->irqlock, flags);
184 int uvcg_dequeue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf,
187 return vb2_dqbuf(&queue->queue, buf, nonblocking);
191 * Poll the video queue.
193 * This function implements video queue polling and is intended to be used by
196 __poll_t uvcg_queue_poll(struct uvc_video_queue *queue, struct file *file,
199 return vb2_poll(&queue->queue, file, wait);
202 int uvcg_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma)
204 return vb2_mmap(&queue->queue, vma);
213 unsigned long uvcg_queue_get_unmapped_area(struct uvc_video_queue *queue,
216 return vb2_get_unmapped_area(&queue->queue, 0, 0, pgoff, 0);
221 * Cancel the video buffers queue.
223 * Cancelling the queue marks all buffers on the irq queue as erroneous,
224 * wakes them up and removes them from the queue.
232 void uvcg_queue_cancel(struct uvc_video_queue *queue, int disconnect)
237 spin_lock_irqsave(&queue->irqlock, flags);
238 while (!list_empty(&queue->irqqueue)) {
239 buf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
240 queue);
241 list_del(&buf->queue);
245 queue->buf_used = 0;
251 * state outside the queue code.
254 queue->flags |= UVC_QUEUE_DISCONNECTED;
255 spin_unlock_irqrestore(&queue->irqlock, flags);
259 * Enable or disable the video buffers queue.
261 * The queue must be enabled before starting video acquisition and must be
262 * disabled after stopping it. This ensures that the video buffers queue
266 * Enabling the video queue initializes parameters (such as sequence number,
267 * sync pattern, ...). If the queue is already enabled, return -EBUSY.
269 * Disabling the video queue cancels the queue and removes all buffers from
270 * the main queue.
275 int uvcg_queue_enable(struct uvc_video_queue *queue, int enable)
281 ret = vb2_streamon(&queue->queue, queue->queue.type);
285 queue->sequence = 0;
286 queue->buf_used = 0;
288 ret = vb2_streamoff(&queue->queue, queue->queue.type);
292 spin_lock_irqsave(&queue->irqlock, flags);
293 INIT_LIST_HEAD(&queue->irqqueue);
297 * applications will be able to queue buffers for the next
301 queue->flags &= ~UVC_QUEUE_DISCONNECTED;
302 spin_unlock_irqrestore(&queue->irqlock, flags);
309 struct uvc_buffer *uvcg_queue_next_buffer(struct uvc_video_queue *queue,
314 if ((queue->flags & UVC_QUEUE_DROP_INCOMPLETE) &&
321 list_del(&buf->queue);
322 if (!list_empty(&queue->irqqueue))
323 nextbuf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
324 queue);
329 buf->buf.sequence = queue->sequence++;
338 struct uvc_buffer *uvcg_queue_head(struct uvc_video_queue *queue)
342 if (!list_empty(&queue->irqqueue))
343 buf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
344 queue);
346 queue->flags |= UVC_QUEUE_PAUSED;