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[media] vb2: add a dev field to use for the default allocation context 

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@cisco.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: Florian Echtler <floe@butterbrot.org>
Cc: Federico Vaga <federico.vaga@gmail.com>
Cc: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
Cc: Scott Jiang <scott.jiang.linux@gmail.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Fabien Dessenne <fabien.dessenne@st.com>
Acked-by: Benoit Parrot <bparrot@ti.com>
Cc: Mikhail Ulyanov <mikhail.ulyanov@cogentembedded.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ludovic Desroches <ludovic.desroches@atmel.com>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Hans Verkuil 2015-12-16 08:30:43 -02:00 committed by Mauro Carvalho Chehab
parent d16e832da2
commit 20be7ab8db
2 changed files with 11 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/media/v4l2-core/videobuf2-core.c
View File

@ -206,7 +206,8 @@ 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],
mem_priv = call_ptr_memop(vb, alloc,
q->alloc_ctx[plane] ? : &q->dev,
q->dma_attrs, 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);

3
include/media/videobuf2-core.h
View File

@ -400,6 +400,8 @@ 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.
* @dma_attrs: DMA attributes to use for the DMA. May be NULL.
* @fileio_read_once: report EOF after reading the first buffer
* @fileio_write_immediately: queue buffer after each write() call
@ -467,6 +469,7 @@ struct vb2_buf_ops {
struct vb2_queue {
unsigned int type;
unsigned int io_modes;
struct device *dev;
const struct dma_attrs *dma_attrs;
unsigned fileio_read_once:1;
unsigned fileio_write_immediately:1;