From 9bf656e1a6b0709122ec3d71131171c92cf4cdae Mon Sep 17 00:00:00 2001 From: Steve Longerbeam Date: Tue, 13 Aug 2019 19:36:44 -0300 Subject: 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 Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab --- Documentation/media/kapi/csi2.rst | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/Documentation/media/kapi/csi2.rst b/Documentation/media/kapi/csi2.rst index c67736a15c45b..030a5c41ec75c 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 ^^^^^^^^^^^^^^^^^^^^^^^^ -- cgit v1.2.3