Commit e2881c64 authored by Hugues Fruchet's avatar Hugues Fruchet Committed by Mauro Carvalho Chehab
Browse files

media: dt-bindings: media: st,stm32-dcmi: add support of BT656 bus 



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: default avatarHugues Fruchet <hugues.fruchet@st.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent d3f863a6

Documentation/devicetree/bindings/media/st,stm32-dcmi.yaml

+38 −0
Original line number Diff line number Diff line
@@ -44,6 +44,43 @@ properties: 
      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
@@ -75,6 +112,7 @@ examples: 
        port {

             dcmi_0: endpoint {

                   remote-endpoint = <&ov5640_0>;

                   bus-type = <5>;

                   bus-width = <8>;

                   hsync-active = <0>;

                   vsync-active = <0>;