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| author | Jiri Kosina <jkosina@suse.cz> | 2020-12-16 13:41:05 +0300 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2020-12-16 13:41:05 +0300 |
| commit | e77bc7dc9af0ec53996367b2053dfafee83b7edb (patch) | |
| tree | 7850cb0cc9e0d7308992b2b983052c5f209245bd /Documentation/userspace-api/media/v4l/func-write.rst | |
| parent | 105856b36c0cefc2fa1c1e649d75da71e2e38c31 (diff) | |
| parent | 82514ecd61435c2d47c235e1343872b38db17be4 (diff) | |
| download | linux-e77bc7dc9af0ec53996367b2053dfafee83b7edb.tar.xz | |
Merge branch 'for-5.11/elecom' into for-linus
- support for EX-G M-XGL20DLBK device, from YOSHIOKA Takuma
Diffstat (limited to 'Documentation/userspace-api/media/v4l/func-write.rst')
| -rw-r--r-- | Documentation/userspace-api/media/v4l/func-write.rst | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/Documentation/userspace-api/media/v4l/func-write.rst b/Documentation/userspace-api/media/v4l/func-write.rst index 37683611df04..49f5a0f4275f 100644 --- a/Documentation/userspace-api/media/v4l/func-write.rst +++ b/Documentation/userspace-api/media/v4l/func-write.rst @@ -1,4 +1,5 @@ .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: V4L .. _func-write: @@ -11,7 +12,6 @@ Name v4l2-write - Write to a V4L2 device - Synopsis ======== @@ -19,15 +19,13 @@ Synopsis #include <unistd.h> - .. c:function:: ssize_t write( int fd, void *buf, size_t count ) - :name: v4l2-write Arguments ========= ``fd`` - File descriptor returned by :ref:`open() <func-open>`. + File descriptor returned by :c:func:`open()`. ``buf`` Buffer with data to be written @@ -38,10 +36,10 @@ Arguments Description =========== -:ref:`write() <func-write>` writes up to ``count`` bytes to the device +:c:func:`write()` writes up to ``count`` bytes to the device referenced by the file descriptor ``fd`` from the buffer starting at ``buf``. When the hardware outputs are not active yet, this function -enables them. When ``count`` is zero, :ref:`write() <func-write>` returns 0 +enables them. When ``count`` is zero, :c:func:`write()` returns 0 without any other effect. When the application does not provide more data in time, the previous @@ -49,7 +47,6 @@ video frame, raw VBI image, sliced VPS or WSS data is displayed again. Sliced Teletext or Closed Caption data is not repeated, the driver inserts a blank line instead. - Return Value ============ @@ -80,5 +77,5 @@ EIO I/O error. This indicates some hardware problem. EINVAL - The :ref:`write() <func-write>` function is not supported by this driver, + The :c:func:`write()` function is not supported by this driver, not on this device, or generally not on this type of device. |