Commit 3e0c2f20 authored by Marek Szyprowski's avatar Marek Szyprowski Committed by Mauro Carvalho Chehab

[media] v4l: vb2: add prepare/finish callbacks to allocators

This patch adds support for prepare/finish callbacks in VB2 allocators. These
callback are used for buffer flushing.
Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Acked-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Tested-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent e15dab75
......@@ -844,6 +844,7 @@ 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;
......@@ -854,6 +855,10 @@ 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;
......@@ -1136,9 +1141,15 @@ static int __qbuf_dmabuf(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);
}
......
......@@ -56,6 +56,10 @@ struct vb2_fileio_data;
* dmabuf
* @unmap_dmabuf: releases access control to the dmabuf - allocator is notified
* that this driver is done using the dmabuf for now
* @prepare: called every time the buffer is passed from userspace to the
* driver, useful for cache synchronisation, optional
* @finish: called every time 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
......@@ -82,6 +86,9 @@ 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 *(*attach_dmabuf)(void *alloc_ctx, struct dma_buf *dbuf,
unsigned long size, int write);
void (*detach_dmabuf)(void *buf_priv);
......
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