Hi Rob,
Rob Herring <robh@xxxxxxxxxx> writes:
> On Tue, Nov 22, 2016 at 07:52:44AM -0800, Kevin Hilman wrote:
>> Signed-off-by: Kevin Hilman <khilman@xxxxxxxxxxxx>
>> ---
>> .../bindings/media/ti,da850-vpif-capture.txt | 65 ++++++++++++++++++++++
>> .../devicetree/bindings/media/ti,da850-vpif.txt | 8 +++
>> 2 files changed, 73 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt
>> create mode 100644 Documentation/devicetree/bindings/media/ti,da850-vpif.txt
>>
>> diff --git a/Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt b/Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt
>> new file mode 100644
>> index 000000000000..c447ac482c1d
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/media/ti,da850-vpif-capture.txt
>> @@ -0,0 +1,65 @@
>> +Texas Instruments VPIF Capture
>> +------------------------------
>> +
>> +The TI Video Port InterFace (VPIF) capture component is the primary
>> +component for video capture on the DA850 family of TI DaVinci SoCs.
>> +
>> +TI Document number reference: SPRUH82C
>> +
>> +Required properties:
>> +- compatible: must be "ti,da850-vpif-capture"
>> +- reg: physical base address and length of the registers set for the device;
>> +- interrupts: should contain IRQ line for the VPIF
>> +
>> +VPIF capture 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.
>> +
>> +Example using 2 8-bit input channels, one of which is connected to an
>> +I2C-connected TVP5147 decoder:
>> +
>> + vpif_capture: video-capture@0x00217000 {
>> + reg = <0x00217000 0x1000>;
>> + interrupts = <92>;
>> +
>> + port {
>> + vpif_ch0: endpoint@0 {
>> + reg = <0>;
>> + bus-width = <8>;
>> + remote-endpoint = <&composite>;
>> + };
>> +
>> + vpif_ch1: endpoint@1 {
>
> I think probably channels here should be ports rather than endpoints.
> AIUI, having multiple endpoints is for cases like a mux or 1 to many
> connections. There's only one data flow, but multiple sources or sinks.
Looking at this closer... , I used an endpoint because it's bascially a
16-bit parallel bus, that can be configured as (up to) 2 8-bit
"channels. So, based on the video-interfaces.txt doc, I configured this
as a single port, with (up to) 2 endpoints. That also allows me to
connect output of the decoder directly, using the remote-endpoint
property.
So I guess I'm not fully understanding your suggestion.
Kevin
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