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media: docs-rst: Clarify duration of LP-11 mode

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Add a sentence that makes it more clear when the CSI-2 transmitter
must, if possible, exit LP-11 mode. That is, maintain LP-11 mode
until stream on, at which point the transmitter activates the clock
lane and transition to HS mode.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Steve Longerbeam 2019-08-13 19:36:44 -03:00 committed by Mauro Carvalho Chehab
parent 24a90c9262
commit 9bf656e1a6
1 changed files with 7 additions and 3 deletions
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10
Documentation/media/kapi/csi2.rst
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@ -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
^^^^^^^^^^^^^^^^^^^^^^^^