The cache synchronisation may be a time consuming operation and thus not
best performed in an interrupt which is a typical context for
vb2_buffer_done() calls. This may consume up to tens of ms on some
machines, depending on the buffer size.
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
---
drivers/media/v4l2-core/videobuf2-core.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/media/v4l2-core/videobuf2-core.c
b/drivers/media/v4l2-core/videobuf2-core.c
index 64fce4d..c5c0707a 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -1177,7 +1177,6 @@ void vb2_buffer_done(struct vb2_buffer *vb, enum
vb2_buffer_state state)
{
struct vb2_queue *q = vb->vb2_queue;
unsigned long flags;
- unsigned int plane;
if (WARN_ON(vb->state != VB2_BUF_STATE_ACTIVE))
return;
@@ -1197,10 +1196,6 @@ void vb2_buffer_done(struct vb2_buffer *vb, enum
vb2_buffer_state state)
dprintk(4, "done processing on buffer %d, state: %d\n",
vb->v4l2_buf.index, state);
- /* sync buffers */
- for (plane = 0; plane < vb->num_planes; ++plane)
- call_void_memop(vb, finish, vb->planes[plane].mem_priv);
-
/* Add the buffer to the done buffers list */
spin_lock_irqsave(&q->done_lock, flags);
vb->state = state;
@@ -2086,7 +2081,7 @@ EXPORT_SYMBOL_GPL(vb2_wait_for_all_buffers);
static void __vb2_dqbuf(struct vb2_buffer *vb)
{
struct vb2_queue *q = vb->vb2_queue;
- unsigned int i;
+ unsigned int plane;
/* nothing to do if the buffer is already dequeued */
if (vb->state == VB2_BUF_STATE_DEQUEUED)
@@ -2094,13 +2089,18 @@ static void __vb2_dqbuf(struct vb2_buffer *vb)
vb->state = VB2_BUF_STATE_DEQUEUED;
+ /* sync buffers */
+ for (plane = 0; plane < vb->num_planes; plane++)
+ call_void_memop(vb, finish, vb->planes[plane].mem_priv);
+
/* unmap DMABUF buffer */
if (q->memory == V4L2_MEMORY_DMABUF)
- for (i = 0; i < vb->num_planes; ++i) {
- if (!vb->planes[i].dbuf_mapped)
+ for (plane = 0; plane < vb->num_planes; ++plane) {
+ if (!vb->planes[plane].dbuf_mapped)
continue;
- call_void_memop(vb, unmap_dmabuf,
vb->planes[i].mem_priv);
- vb->planes[i].dbuf_mapped = 0;
+ call_void_memop(vb, unmap_dmabuf,
+ vb->planes[plane].mem_priv);
+ vb->planes[plane].dbuf_mapped = 0;
}
}
--
2.1.0.231.g7484e3b
--
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