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media: videodev2.h: add new capabilities for buffer types

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VIDIOC_REQBUFS and VIDIOC_CREATE_BUFFERS will return capabilities
telling userspace what the given buffer type is capable of.

Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Hans Verkuil 2018-08-23 09:56:22 -04:00 • committed by Mauro Carvalho Chehab
parent dc58a553ba
commit f35f5d72e7
3 changed files with 65 additions and 4 deletions
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13
include/uapi/linux/videodev2.h
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@ -856,9 +856,16 @@ struct v4l2_requestbuffers {
__u32 count;
__u32 type; /* enum v4l2_buf_type */
__u32 memory; /* enum v4l2_memory */
__u32 reserved[2];
__u32 capabilities;
__u32 reserved[1];
};
/* capabilities for struct v4l2_requestbuffers and v4l2_create_buffers */
#define V4L2_BUF_CAP_SUPPORTS_MMAP (1 << 0)
#define V4L2_BUF_CAP_SUPPORTS_USERPTR (1 << 1)
#define V4L2_BUF_CAP_SUPPORTS_DMABUF (1 << 2)
#define V4L2_BUF_CAP_SUPPORTS_REQUESTS (1 << 3)
/**
* struct v4l2_plane - plane info for multi-planar buffers
* @bytesused: number of bytes occupied by data in the plane (payload)
@ -2319,6 +2326,7 @@ struct v4l2_dbg_chip_info {
* return: number of created buffers
* @memory: enum v4l2_memory; buffer memory type
* @format: frame format, for which buffers are requested
* @capabilities: capabilities of this buffer type.
* @reserved: future extensions
*/
struct v4l2_create_buffers {
@ -2326,7 +2334,8 @@ struct v4l2_create_buffers {
__u32 count;
__u32 memory;
struct v4l2_format format;
__u32 reserved[8];
__u32 capabilities;
__u32 reserved[7];
};
/*