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[media] dt-bindings: add TI VPIF documentation
Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kevin Hilman <khilman@baylibre.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Texas Instruments VPIF | ||
---------------------- | ||
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The TI Video Port InterFace (VPIF) is the primary component for video | ||
capture and display on the DA850/AM18x family of TI DaVinci/Sitara | ||
SoCs. | ||
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TI Document reference: SPRUH82C, Chapter 35 | ||
http://www.ti.com/lit/pdf/spruh82 | ||
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Required properties: | ||
- compatible: must be "ti,da850-vpif" | ||
- reg: physical base address and length of the registers set for the device; | ||
- interrupts: should contain IRQ line for the VPIF | ||
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Video Capture: | ||
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VPIF has a 16-bit parallel bus input, supporting 2 8-bit channels or a | ||
single 16-bit channel. It should contain at least one port child node | ||
with child 'endpoint' node. Please refer to the bindings defined in | ||
Documentation/devicetree/bindings/media/video-interfaces.txt. | ||
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Example using 2 8-bit input channels, one of which is connected to an | ||
I2C-connected TVP5147 decoder: | ||
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vpif: vpif@217000 { | ||
compatible = "ti,da850-vpif"; | ||
reg = <0x217000 0x1000>; | ||
interrupts = <92>; | ||
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port { | ||
vpif_ch0: endpoint@0 { | ||
reg = <0>; | ||
bus-width = <8>; | ||
remote-endpoint = <&composite>; | ||
}; | ||
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vpif_ch1: endpoint@1 { | ||
reg = <1>; | ||
bus-width = <8>; | ||
data-shift = <8>; | ||
}; | ||
}; | ||
}; | ||
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[ ... ] | ||
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&i2c0 { | ||
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tvp5147@5d { | ||
compatible = "ti,tvp5147"; | ||
reg = <0x5d>; | ||
status = "okay"; | ||
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port { | ||
composite: endpoint { | ||
hsync-active = <1>; | ||
vsync-active = <1>; | ||
pclk-sample = <0>; | ||
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/* VPIF channel 0 (lower 8-bits) */ | ||
remote-endpoint = <&vpif_ch0>; | ||
bus-width = <8>; | ||
}; | ||
}; | ||
}; | ||
}; | ||
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Alternatively, an example when the bus is configured as a single | ||
16-bit input (e.g. for raw-capture mode): | ||
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vpif: vpif@217000 { | ||
compatible = "ti,da850-vpif"; | ||
reg = <0x217000 0x1000>; | ||
interrupts = <92>; | ||
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port { | ||
vpif_ch0: endpoint { | ||
bus-width = <16>; | ||
}; | ||
}; | ||
}; |