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media: dt: bindings: media: Document data lane numbering without lane reordering

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Most devices do not support lane reordering and in many cases the
documentation of the data-lanes property is incomplete for such devices.
Document that in case the lane reordering isn't supported, monotonically
incremented values from 0 or 1 shall be used.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Sakari Ailus 2017-09-18 01:20:59 -07:00 committed by Mauro Carvalho Chehab
parent a197c7fccc
commit 7571358dd2
1 changed files with 4 additions and 1 deletions
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5
Documentation/devicetree/bindings/media/video-interfaces.txt
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@ -108,7 +108,10 @@ Optional endpoint properties
determines the logical lane number, while the value of an entry indicates
physical lane, e.g. for 2-lane MIPI CSI-2 bus we could have
"data-lanes = <1 2>;", assuming the clock lane is on hardware lane 0.
This property is valid for serial busses only (e.g. MIPI CSI-2).
If the hardware does not support lane reordering, monotonically
incremented values shall be used from 0 or 1 onwards, depending on
whether or not there is also a clock lane. This property is valid for
serial busses only (e.g. MIPI CSI-2).
- clock-lanes: an array of physical clock lane indexes. Position of an entry
determines the logical lane number, while the value of an entry indicates
physical lane, e.g. for a MIPI CSI-2 bus we could have "clock-lanes = <0>;",