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authorLinus Torvalds <torvalds@linux-foundation.org>2020-03-30 12:45:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-03-30 12:45:23 -0700
commit481ed297d900af0ce395f6ca8975903b76a5a59e (patch)
treee3862e9993cd8e2245c5a6d632f45dd3f77d1d62 /Documentation/media/kapi/v4l2-controls.rst
parente59cd88028dbd41472453e5883f78330aa73c56e (diff)
parentabcb1e021ae5a36374c635eeaba5cec733169b78 (diff)
Merge tag 'docs-5.7' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet: "This has been a busy cycle for documentation work. Highlights include: - Lots of RST conversion work by Mauro, Daniel ALmeida, and others. Maybe someday we'll get to the end of this stuff...maybe... - Some organizational work to bring some order to the core-api manual. - Various new docs and additions to the existing documentation. - Typo fixes, warning fixes, ..." * tag 'docs-5.7' of git://git.lwn.net/linux: (123 commits) Documentation: x86: exception-tables: document CONFIG_BUILDTIME_TABLE_SORT MAINTAINERS: adjust to filesystem doc ReST conversion docs: deprecated.rst: Add BUG()-family doc: zh_CN: add translation for virtiofs doc: zh_CN: index files in filesystems subdirectory docs: locking: Drop :c:func: throughout docs: locking: Add 'need' to hardirq section docs: conf.py: avoid thousands of duplicate label warning on Sphinx docs: prevent warnings due to autosectionlabel docs: fix reference to core-api/namespaces.rst docs: fix pointers to io-mapping.rst and io_ordering.rst files Documentation: Better document the softlockup_panic sysctl docs: hw-vuln: tsx_async_abort.rst: get rid of an unused ref docs: perf: imx-ddr.rst: get rid of a warning docs: filesystems: fuse.rst: supress a Sphinx warning docs: translations: it: avoid duplicate refs at programming-language.rst docs: driver.rst: supress two ReSt warnings docs: trace: events.rst: convert some new stuff to ReST format Documentation: Add io_ordering.rst to driver-api manual Documentation: Add io-mapping.rst to driver-api manual ...
Diffstat (limited to 'Documentation/media/kapi/v4l2-controls.rst')
-rw-r--r--Documentation/media/kapi/v4l2-controls.rst8
1 files changed, 4 insertions, 4 deletions
diff --git a/Documentation/media/kapi/v4l2-controls.rst b/Documentation/media/kapi/v4l2-controls.rst
index b20800cae3f2..5129019afb49 100644
--- a/Documentation/media/kapi/v4l2-controls.rst
+++ b/Documentation/media/kapi/v4l2-controls.rst
@@ -291,8 +291,8 @@ and QUERYMENU. And G/S_CTRL as well as G/TRY/S_EXT_CTRLS are automatically suppo
In practice the basic usage as described above is sufficient for most drivers.
-Inheriting Controls
--------------------
+Inheriting Sub-device Controls
+------------------------------
When a sub-device is registered with a V4L2 driver by calling
v4l2_device_register_subdev() and the ctrl_handler fields of both v4l2_subdev
@@ -757,8 +757,8 @@ attempting to find another control from the same handler will deadlock.
It is recommended not to use this function from inside the control ops.
-Inheriting Controls
--------------------
+Preventing Controls inheritance
+-------------------------------
When one control handler is added to another using v4l2_ctrl_add_handler, then
by default all controls from one are merged to the other. But a subdev might