Add support of BT656 embedded synchronization bus mode in DCMI driver.
Add "bus-type" property and make it required so that there is no
ambiguity between parallel mode (bus-type=5) and BT656 mode (bus-type=6).
BT656 mode allows to save hardware synchro lines hsync & vsync by replacing
them with synchro codes embedded in data stream, hence hsync-active &
vsync-active properties are useless in this mode.
With DCMI, BT656 bus mode is only compatible with 8 bits width data bus.
Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
bindings defined in
Documentation/devicetree/bindings/media/video-interfaces.txt.
+ properties:
+ endpoint:
+ type: object
+
+ properties:
+ bus-type:
+ enum: [5, 6]
+ default: 5
+
+ bus-width:
+ enum: [8, 10, 12, 14]
+ default: 8
+
+ remote-endpoint: true
+
+ allOf:
+ - if:
+ properties:
+ bus-type:
+ const: 6
+
+ then:
+ properties:
+ hsync-active: false
+ vsync-active: false
+ bus-width:
+ enum: [8]
+
+ required:
+ - remote-endpoint
+ - bus-type
+ - pclk-sample
+
+ unevaluatedProperties: false
+
+ additionalProperties: false
+
required:
- compatible
- reg
port {
dcmi_0: endpoint {
remote-endpoint = <&ov5640_0>;
+ bus-type = <5>;
bus-width = <8>;
hsync-active = <0>;
vsync-active = <0>;