From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
The allocation context is nothing more than a per-plane device pointer
to use when allocating buffers. So just provide a dev pointer in vb2_queue
for that purpose and drivers can skip allocating/releasing/filling in
the allocation context unless they require different per-plane device
pointers as used by some Samsung SoCs.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Cc: Laurent Pinchart <Laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: Sakari Ailus <sakari.ailus@xxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>
Cc: Florian Echtler <floe@xxxxxxxxxxxxxx>
Cc: Federico Vaga <federico.vaga@xxxxxxxxx>
Cc: "Lad, Prabhakar" <prabhakar.csengg@xxxxxxxxx>
Cc: Scott Jiang <scott.jiang.linux@xxxxxxxxx>
Cc: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
Cc: Fabien Dessenne <fabien.dessenne@xxxxxx>
Cc: Benoit Parrot <bparrot@xxxxxx>
Cc: Mikhail Ulyanov <mikhail.ulyanov@xxxxxxxxxxxxxxxxxx>
Cc: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
Cc: Javier Martin <javier.martin@xxxxxxxxxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
Cc: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
Cc: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Cc: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
---
drivers/media/v4l2-core/videobuf2-core.c | 16 +++++++++-------
include/media/videobuf2-core.h | 3 +++
2 files changed, 12 insertions(+), 7 deletions(-)
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index 5d016f4..88b5e48 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -206,8 +206,9 @@ static int __vb2_buf_mem_alloc(struct vb2_buffer *vb)
for (plane = 0; plane < vb->num_planes; ++plane) {
unsigned long size = PAGE_ALIGN(vb->planes[plane].length);
- mem_priv = call_ptr_memop(vb, alloc, q->alloc_ctx[plane],
- size, dma_dir, q->gfp_flags);
+ mem_priv = call_ptr_memop(vb, alloc,
+ q->alloc_ctx[plane] ? : &q->dev,
+ size, dma_dir, q->gfp_flags);
if (IS_ERR_OR_NULL(mem_priv))
goto free;
@@ -1131,9 +1132,10 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const void *pb)
vb->planes[plane].data_offset = 0;
/* Acquire each plane's memory */
- mem_priv = call_ptr_memop(vb, get_userptr, q->alloc_ctx[plane],
- planes[plane].m.userptr,
- planes[plane].length, dma_dir);
+ mem_priv = call_ptr_memop(vb, get_userptr,
+ q->alloc_ctx[plane] ? : &q->dev,
+ planes[plane].m.userptr,
+ planes[plane].length, dma_dir);
if (IS_ERR_OR_NULL(mem_priv)) {
dprintk(1, "failed acquiring userspace "
"memory for plane %d\n", plane);
@@ -1256,8 +1258,8 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const void *pb)
/* Acquire each plane's memory */
mem_priv = call_ptr_memop(vb, attach_dmabuf,
- q->alloc_ctx[plane], dbuf, planes[plane].length,
- dma_dir);
+ q->alloc_ctx[plane] ? : &q->dev,
+ dbuf, planes[plane].length, dma_dir);
if (IS_ERR(mem_priv)) {
dprintk(1, "failed to attach dmabuf\n");
ret = PTR_ERR(mem_priv);
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index 8a0f55b..0f8b97b 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -397,6 +397,8 @@ struct vb2_buf_ops {
* caller. For example, for V4L2, it should match
* the V4L2_BUF_TYPE_* in include/uapi/linux/videodev2.h
* @io_modes: supported io methods (see vb2_io_modes enum)
+ * @dev: device to use for the default allocation context if the driver
+ * doesn't fill in the @alloc_ctx array.
* @fileio_read_once: report EOF after reading the first buffer
* @fileio_write_immediately: queue buffer after each write() call
* @allow_zero_bytesused: allow bytesused == 0 to be passed to the driver
@@ -460,6 +462,7 @@ struct vb2_buf_ops {
struct vb2_queue {
unsigned int type;
unsigned int io_modes;
+ struct device *dev;
unsigned fileio_read_once:1;
unsigned fileio_write_immediately:1;
unsigned allow_zero_bytesused:1;
--
2.8.0.rc3
--
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