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| author | Steve Longerbeam <slongerbeam@gmail.com> | 2019-08-13 19:36:44 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-08-15 08:15:25 -0300 |
| commit | 9bf656e1a6b0709122ec3d71131171c92cf4cdae (patch) | |
| tree | 8078126ed88f85d73c3d3a04ad551680d54215f2 | |
| parent | 24a90c926219505efd9b9ac773bb015e32d5519c (diff) | |
| download | linux-0-day-9bf656e1a6b0709122ec3d71131171c92cf4cdae.tar.gz linux-0-day-9bf656e1a6b0709122ec3d71131171c92cf4cdae.tar.xz | |
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.rst | 10 |
1 files 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 ^^^^^^^^^^^^^^^^^^^^^^^^ |