aboutsummaryrefslogtreecommitdiff
path: root/Documentation/driver-api
diff options
context:
space:
mode:
authorGreg Kroah-Hartman2022-11-21 10:21:53 +0100
committerGreg Kroah-Hartman2022-11-21 10:21:53 +0100
commit05df6ab8eba625a1d97eb67ee06d786b8e460685 (patch)
tree7fed59b7f49fd8d816475ca6b20c95c7f837ca6f /Documentation/driver-api
parent1d926e259d8f8195fdfaeea7951149001894b473 (diff)
parenteb7081409f94a9a8608593d0fb63a1aa3d6f95d8 (diff)
Merge 6.1-rc6 into driver-core-next
We need the kernfs changes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/driver-api')
-rw-r--r--Documentation/driver-api/basics.rst3
-rw-r--r--Documentation/driver-api/driver-model/devres.rst1
-rw-r--r--Documentation/driver-api/media/mc-core.rst19
-rw-r--r--Documentation/driver-api/miscellaneous.rst5
4 files changed, 18 insertions, 10 deletions
diff --git a/Documentation/driver-api/basics.rst b/Documentation/driver-api/basics.rst
index 3e2dae954898..4b4d8e28d3be 100644
--- a/Documentation/driver-api/basics.rst
+++ b/Documentation/driver-api/basics.rst
@@ -107,9 +107,6 @@ Kernel utility functions
.. kernel-doc:: kernel/panic.c
:export:
-.. kernel-doc:: include/linux/overflow.h
- :internal:
-
Device Resource Management
--------------------------
diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst
index ac9b9ff37f50..47a14aa2fad8 100644
--- a/Documentation/driver-api/driver-model/devres.rst
+++ b/Documentation/driver-api/driver-model/devres.rst
@@ -279,6 +279,7 @@ GPIO
devm_gpio_request_one()
I2C
+ devm_i2c_add_adapter()
devm_i2c_new_dummy_device()
IIO
diff --git a/Documentation/driver-api/media/mc-core.rst b/Documentation/driver-api/media/mc-core.rst
index 84aa7cdb5341..400b8ca29367 100644
--- a/Documentation/driver-api/media/mc-core.rst
+++ b/Documentation/driver-api/media/mc-core.rst
@@ -214,18 +214,29 @@ Link properties can be modified at runtime by calling
Pipelines and media streams
^^^^^^^^^^^^^^^^^^^^^^^^^^^
+A media stream is a stream of pixels or metadata originating from one or more
+source devices (such as a sensors) and flowing through media entity pads
+towards the final sinks. The stream can be modified on the route by the
+devices (e.g. scaling or pixel format conversions), or it can be split into
+multiple branches, or multiple branches can be merged.
+
+A media pipeline is a set of media streams which are interdependent. This
+interdependency can be caused by the hardware (e.g. configuration of a second
+stream cannot be changed if the first stream has been enabled) or by the driver
+due to the software design. Most commonly a media pipeline consists of a single
+stream which does not branch.
+
When starting streaming, drivers must notify all entities in the pipeline to
prevent link states from being modified during streaming by calling
:c:func:`media_pipeline_start()`.
-The function will mark all entities connected to the given entity through
-enabled links, either directly or indirectly, as streaming.
+The function will mark all the pads which are part of the pipeline as streaming.
The struct media_pipeline instance pointed to by
-the pipe argument will be stored in every entity in the pipeline.
+the pipe argument will be stored in every pad in the pipeline.
Drivers should embed the struct media_pipeline
in higher-level pipeline structures and can then access the
-pipeline through the struct media_entity
+pipeline through the struct media_pad
pipe field.
Calls to :c:func:`media_pipeline_start()` can be nested.
diff --git a/Documentation/driver-api/miscellaneous.rst b/Documentation/driver-api/miscellaneous.rst
index 304ffb146cf9..4a5104a368ac 100644
--- a/Documentation/driver-api/miscellaneous.rst
+++ b/Documentation/driver-api/miscellaneous.rst
@@ -16,12 +16,11 @@ Parallel Port Devices
16x50 UART Driver
=================
-.. kernel-doc:: drivers/tty/serial/serial_core.c
- :export:
-
.. kernel-doc:: drivers/tty/serial/8250/8250_core.c
:export:
+See serial/driver.rst for related APIs.
+
Pulse-Width Modulation (PWM)
============================