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authorSteve Longerbeam <slongerbeam@gmail.com>2019-08-13 19:36:44 -0300
committerMauro Carvalho Chehab <mchehab+samsung@kernel.org>2019-08-15 08:15:25 -0300
commit9bf656e1a6b0709122ec3d71131171c92cf4cdae (patch)
tree8078126ed88f85d73c3d3a04ad551680d54215f2
parent24a90c926219505efd9b9ac773bb015e32d5519c (diff)
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media: docs-rst: Clarify duration of LP-11 mode
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>
-rw-r--r--Documentation/media/kapi/csi2.rst10
1 files changed, 7 insertions, 3 deletions
diff --git a/Documentation/media/kapi/csi2.rst b/Documentation/media/kapi/csi2.rst
index c67736a15c45..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
^^^^^^^^^^^^^^^^^^^^^^^^