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[media] videobuf2-core.h: document enum vb2_memory

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This enum was not documented. Document it.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Mauro Carvalho Chehab 2016-09-08 14:08:00 -03:00
parent 88b7eb092e
commit 52839f66ed
1 changed files with 14 additions and 0 deletions
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14
include/media/videobuf2-core.h
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@ -20,6 +20,20 @@
#define VB2_MAX_FRAME (32)
#define VB2_MAX_PLANES (8)
/**
* enum vb2_memory - type of memory model used to make the buffers visible
* on userspace.
*
* @VB2_MEMORY_UNKNOWN: Buffer status is unknown or it is not used yet on
* userspace.
* @VB2_MEMORY_MMAP: The buffers are allocated by the Kernel and it is
* memory mapped via mmap() ioctl. This model is
* also used when the user is using the buffers via
* read() or write() system calls.
* @VB2_MEMORY_USERPTR: The buffers was allocated in userspace and it is
* memory mapped via mmap() ioctl.
* @VB2_MEMORY_DMABUF: The buffers are passed to userspace via DMA buffer.
*/
enum vb2_memory {
VB2_MEMORY_UNKNOWN = 0,
VB2_MEMORY_MMAP = 1,