Each data lane on a CSI-2 C-PHY bus uses three phase encoding and is
constructed from three physical wires. The wires are referred to as A, B
and C and their default order is ABC. However to ease hardware design
the specification allows for the wires to be switched in any order.
Add a vendor neutral property to describe the line order used. The
property name 'line-orders', the possible values it can be assigned and
there names are taken from the MIPI Discovery and Configuration (DisCo)
Specification for Imaging.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
---
* Changes since v1
- Add missing 'items' node.
- Improve usage of should and must it the property description as
suggested by Sakari, thanks!
---
.../bindings/media/video-interfaces.yaml | 21 +++++++++++++++++++
include/dt-bindings/media/video-interfaces.h | 7 +++++++
2 files changed, 28 insertions(+)
diff --git a/Documentation/devicetree/bindings/media/video-interfaces.yaml b/Documentation/devicetree/bindings/media/video-interfaces.yaml
index 26e3e7d7c67b..038e85b45bef 100644
--- a/Documentation/devicetree/bindings/media/video-interfaces.yaml
+++ b/Documentation/devicetree/bindings/media/video-interfaces.yaml
@@ -210,6 +210,27 @@ properties:
lane-polarities property is omitted, the value must be interpreted as 0
(normal). This property is valid for serial busses only.
+ line-orders:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ minItems: 1
+ maxItems: 8
+ items:
+ enum:
+ - 0 # ABC
+ - 1 # ACB
+ - 2 # BAC
+ - 3 # BCA
+ - 4 # CAB
+ - 5 # CBA
+ description:
+ An array of line orders of the CSI-2 C-PHY data lanes. The order of the
+ lanes are the same as in data-lanes property. Valid values are 0-5 as
+ defined in the MIPI Discovery and Configuration (DisCo) Specification for
+ Imaging. The length of the array must be the same length as the
+ data-lanes property. If the line-orders property is omitted, the value
+ shall be interpreted as 0 (ABC). This property is valid for CSI-2 C-PHY
+ busses only.
+
strobe:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [ 0, 1 ]
diff --git a/include/dt-bindings/media/video-interfaces.h b/include/dt-bindings/media/video-interfaces.h
index 68ac4e05e37f..88b9d05d8075 100644
--- a/include/dt-bindings/media/video-interfaces.h
+++ b/include/dt-bindings/media/video-interfaces.h
@@ -13,4 +13,11 @@
#define MEDIA_BUS_TYPE_PARALLEL 5
#define MEDIA_BUS_TYPE_BT656 6
+#define MEDIA_BUS_CSI2_CPHY_LINE_ORDER_ABC 0
+#define MEDIA_BUS_CSI2_CPHY_LINE_ORDER_ACB 1
+#define MEDIA_BUS_CSI2_CPHY_LINE_ORDER_BAC 2
+#define MEDIA_BUS_CSI2_CPHY_LINE_ORDER_BCA 3
+#define MEDIA_BUS_CSI2_CPHY_LINE_ORDER_CAB 4
+#define MEDIA_BUS_CSI2_CPHY_LINE_ORDER_CBA 5
+
#endif /* __DT_BINDINGS_MEDIA_VIDEO_INTERFACES_H__ */
--
2.47.0
