This patch adds support for prepare/finish callbacks in VB2 allocators.
These callback are used for buffer flushing.
Signed-off-by: Marek Szyprowski <m.szyprow...@samsung.com>
Acked-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Acked-by: Federico Vaga <federico.v...@gmail.com>
---
drivers/media/v4l2-core/videobuf2-core.c | 11 +++++++++++
include/media/videobuf2-core.h | 7 +++++++
2 file modificati, 18 inserzioni(+)
diff --git a/drivers/media/v4l2-core/videobuf2-core.c
b/drivers/media/v4l2-core/videobuf2-core.c
index 4da3df6..079fa79 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -790,6 +790,7 @@ 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 (vb->state != VB2_BUF_STATE_ACTIVE)
return;
@@ -800,6 +801,10 @@ 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, vb->state);
+ /* sync buffers */
+ for (plane = 0; plane < vb->num_planes; ++plane)
+ call_memop(q, finish, vb->planes[plane].mem_priv);
+
/* Add the buffer to the done buffers list */
spin_lock_irqsave(&q->done_lock, flags);
vb->state = state;
@@ -975,9 +980,15 @@ static int __qbuf_mmap(struct vb2_buffer *vb, const struct
v4l2_buffer *b)
static void __enqueue_in_driver(struct vb2_buffer *vb)
{
struct vb2_queue *q = vb->vb2_queue;
+ unsigned int plane;
vb->state = VB2_BUF_STATE_ACTIVE;
atomic_inc(&q->queued_count);
+
+ /* sync buffers */
+ for (plane = 0; plane < vb->num_planes; ++plane)
+ call_memop(q, prepare, vb->planes[plane].mem_priv);
+
q->ops->buf_queue(vb);
}
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index 8dd9b6c..f374f99 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -41,6 +41,10 @@ struct vb2_fileio_data;
* argument to other ops in this structure
* @put_userptr: inform the allocator that a USERPTR buffer will no longer
* be used
+ * @prepare: called everytime the buffer is passed from userspace to the
+ * driver, usefull for cache synchronisation, optional
+ * @finish: called everytime the buffer is passed back from the driver
+ * to the userspace, also optional
* @vaddr: return a kernel virtual address to a given memory buffer
* associated with the passed private structure or NULL if no
* such mapping exists
@@ -65,6 +69,9 @@ struct vb2_mem_ops {
unsigned long size, int write);
void (*put_userptr)(void *buf_priv);
+ void (*prepare)(void *buf_priv);
+ void (*finish)(void *buf_priv);
+
void *(*vaddr)(void *buf_priv);
void *(*cookie)(void *buf_priv);
--
1.7.11.4
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