| Message ID | 1604511132-4014-3-git-send-email-hugues.fruchet@st.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | DCMI BT656 parallel bus mode support | expand |
On Wed, 04 Nov 2020 18:32:10 +0100, Hugues Fruchet wrote: > 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> > --- > .../devicetree/bindings/media/st,stm32-dcmi.yaml | 38 ++++++++++++++++++++++ > 1 file changed, 38 insertions(+) > Reviewed-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/media/st,stm32-dcmi.yaml b/Documentation/devicetree/bindings/media/st,stm32-dcmi.yaml index 3fe778c..c18574b 100644 --- a/Documentation/devicetree/bindings/media/st,stm32-dcmi.yaml +++ b/Documentation/devicetree/bindings/media/st,stm32-dcmi.yaml @@ -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>;
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> --- .../devicetree/bindings/media/st,stm32-dcmi.yaml | 38 ++++++++++++++++++++++ 1 file changed, 38 insertions(+)