diff options
| -rw-r--r-- | include/media/videobuf2-core.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index 68f93dacb38f..65eeca83687a 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -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, |