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media: dt-bindings: media: rcar-vin: Describe optional ep properties

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Describe the optional endpoint properties for endpoint nodes of the R-Car
VIN interface device tree bindings documentation.

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Acked-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Rob Herring <robh@kernel.org>
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:
Jacopo Mondi 2018-07-09 10:19:17 -04:00 committed by Mauro Carvalho Chehab
parent 4c471ffe2c
commit 3ab7801dfa
1 changed files with 17 additions and 0 deletions
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17
Documentation/devicetree/bindings/media/rcar_vin.txt
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@ -45,6 +45,17 @@ The per-board settings Gen2 platforms:
Only the first one will be considered as each vin interface has one
input port.
- Optional properties for endpoint nodes:
- hsync-active: see [1] for description. Default is active high.
- vsync-active: see [1] for description. Default is active high.
If both HSYNC and VSYNC polarities are not specified, embedded
synchronization is selected.
- field-active-even: see [1] for description. Default is active high.
- bus-width: see [1] for description. The selected bus width depends on
the SoC type and selected input image format.
Valid values are: 8, 10, 12, 16, 24 and 32.
- data-shift: see [1] for description. Valid values are 0 and 8.
The per-board settings Gen3 platforms:
Gen3 platforms can support both a single connected parallel input source
@ -57,6 +68,10 @@ from local SoC CSI-2 receivers (port@1) depending on SoC.
from external SoC pins as described in video-interfaces.txt[1].
Describing more than one endpoint in port@0 is invalid. Only VIN
instances that are connected to external pins should have port@0.
Endpoint nodes of port@0 support the optional properties listed in
the Gen2 per-board settings description.
- port@1 - sub-nodes describing one or more endpoints connected to
the VIN from local SoC CSI-2 receivers. The endpoint numbers must
use the following schema.
@ -66,6 +81,8 @@ from local SoC CSI-2 receivers (port@1) depending on SoC.
- endpoint@2 - sub-node describing the endpoint connected to CSI40
- endpoint@3 - sub-node describing the endpoint connected to CSI41
Endpoint nodes of port@1 do not support any optional endpoint property.
Device node example for Gen2 platforms
--------------------------------------