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| author | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-09-02 22:32:15 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-09-05 12:24:45 +0200 |
| commit | d39d7085222f78035b49bc48eb1c0f6180d085b9 (patch) | |
| tree | 925d79ef9ef9a56229ef52821f0a3192ce717d9c /Documentation/media | |
| parent | media: v4l uAPI: add descriptions for arguments to all ioctls (diff) | |
| download | linux-d39d7085222f78035b49bc48eb1c0f6180d085b9.tar.xz linux-d39d7085222f78035b49bc48eb1c0f6180d085b9.zip | |
media: vidioc-querycap: use a more realistic value for KERNEL_VERSION
In the past, V4L2 versions were 0.x.y, but that changed years
ago. Since Kernel 3.1, however, the numbering schema was changed
to match the Kernel version.
However, the presented example still uses the old numerating
schema, with is a misleading information.
So, update it to the new schema.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'Documentation/media')
| -rw-r--r-- | Documentation/media/uapi/v4l/vidioc-querycap.rst | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/media/uapi/v4l/vidioc-querycap.rst b/Documentation/media/uapi/v4l/vidioc-querycap.rst index 9494af96bae7..7553b44692b4 100644 --- a/Documentation/media/uapi/v4l/vidioc-querycap.rst +++ b/Documentation/media/uapi/v4l/vidioc-querycap.rst @@ -92,12 +92,13 @@ specification the ioctl returns an ``EINVAL`` error code. stack from a newer kernel. The version number is formatted using the ``KERNEL_VERSION()`` - macro: + macro. For example if the media stack corresponds to the V4L2 + version shipped with Kernel 4.14, it would be equivalent to: * - :cspan:`2` ``#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))`` - ``__u32 version = KERNEL_VERSION(0, 8, 1);`` + ``__u32 version = KERNEL_VERSION(4, 14, 0);`` ``printf ("Version: %u.%u.%u\\n",`` |