diff mbox

[1/4] v4l: vb2: add prepare/finish callbacks to allocators

Message ID 1348219298-23273-1-git-send-email-federico.vaga@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Federico Vaga Sept. 21, 2012, 9:21 a.m. UTC
This patch adds support for prepare/finish callbacks in VB2 allocators.
These callback are used for buffer flushing.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>
---
 drivers/media/v4l2-core/videobuf2-core.c | 11 +++++++++++
 include/media/videobuf2-core.h           |  7 +++++++
 2 file modificati, 18 inserzioni(+)

Comments

Hans Verkuil Sept. 21, 2012, 9:36 a.m. UTC | #1
On Fri September 21 2012 11:21:35 Federico Vaga wrote:
> This patch adds support for prepare/finish callbacks in VB2 allocators.
> These callback are used for buffer flushing.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Acked-by: Federico Vaga <federico.vaga@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

nitpick: everytime -> every time

> + *		driver, usefull for cache synchronisation, optional
> + * @finish:	called everytime the buffer is passed back from the driver

ditto.

> + *		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);
>  
> 
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Federico Vaga Sept. 21, 2012, 9:54 a.m. UTC | #2
> > 
> > + * @prepare:	called everytime the buffer is passed from userspace
> > to the
> nitpick: everytime -> every time
> 
> > + *		driver, usefull for cache synchronisation, optional
> > + * @finish:	called everytime the buffer is passed back from the
> > driver
> ditto.
> 

This patch come from here: https://patchwork.kernel.org/patch/1323411/

I send it with my patch set because my work require this patch but it is 
not in the next tree. I think it is convenient to fix the original 
patch, probably it will be integrated in the kernel before this one; so 
this patch will be useless.

Anyway, I will apply this comment fix.
diff mbox

Patch

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);