diff options
Diffstat (limited to 'Documentation/media/kapi')
| -rw-r--r-- | Documentation/media/kapi/csi2.rst | 17 | ||||
| -rw-r--r-- | Documentation/media/kapi/v4l2-dev.rst | 1 |
2 files changed, 15 insertions, 3 deletions
diff --git a/Documentation/media/kapi/csi2.rst b/Documentation/media/kapi/csi2.rst index a7e75e2eba85..030a5c41ec75 100644 --- a/Documentation/media/kapi/csi2.rst +++ b/Documentation/media/kapi/csi2.rst @@ -49,9 +49,13 @@ where The transmitter drivers must, if possible, configure the CSI-2 transmitter to *LP-11 mode* whenever the transmitter is powered on but -not active. Some transmitters do this automatically but some have to -be explicitly programmed to do so, and some are unable to do so -altogether due to hardware constraints. +not active, and maintain *LP-11 mode* until stream on. Only at stream +on should the transmitter activate the clock on the clock lane and +transition to *HS mode*. + +Some transmitters do this automatically but some have to be explicitly +programmed to do so, and some are unable to do so altogether due to +hardware constraints. Stopping the transmitter ^^^^^^^^^^^^^^^^^^^^^^^^ @@ -72,3 +76,10 @@ the transmitter up by using the :c:type:`v4l2_subdev_core_ops`->s_power() callback. This may take place either indirectly by using :c:func:`v4l2_pipeline_pm_use` or directly. + +Formats +------- + +The media bus pixel codes document parallel formats. Should the pixel data be +transported over a serial bus, the media bus pixel code that describes a +parallel format that transfers a sample on a single clock cycle is used. diff --git a/Documentation/media/kapi/v4l2-dev.rst b/Documentation/media/kapi/v4l2-dev.rst index b359f1804bbe..4c5a15c53dbf 100644 --- a/Documentation/media/kapi/v4l2-dev.rst +++ b/Documentation/media/kapi/v4l2-dev.rst @@ -288,6 +288,7 @@ Mask Description 0x08 Log the read and write file operations and the VIDIOC_QBUF and VIDIOC_DQBUF ioctls. 0x10 Log the poll file operation. +0x20 Log error and messages in the control operations. ===== ================================================================ Video device cleanup |