Re: [RFC] dt-bindings: media: video-interfaces: How to describe physical lanes for CSI-2 C-PHY

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Hejssan Niklas,

On Sun, May 26, 2024 at 12:07:47AM +0200, Niklas Söderlund wrote:
> 1. We could add a new generic property to fulfill the 'lane-polarities' 
>    function for C-PHY, 'lane-polarities-mipi-cphy'. That would only be 
>    valid for C-PHY buses.
> 
>    The structure would be the same as for lane-polarities but the items 
>    enum would allow a value from 0-5 for each entry in the array. And we 
>    could define mappings in dt-bindings/media/video-interfaces.h to 
>    allow names in DTS, MEDIA_BUS_CSI2_CPHY_{ABC,CBA,ACB,CAB,BAC,BCA}?
> 
>    This feels wrong as we already have 'lane-polarities' and it is used 
>    for CSI-2 D-PHY configurations already.

Could you add a property for this called "line-orders" with matching data
line order in MIPI DisCo for Imaging specification
<URL:https://www.mipi.org/specifications/mipi-disco-imaging>?

The polarity isn't a right term here as it's not a differential pair as on
D-PHY.

-- 
Hälsningar,

Sakari Ailus




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