Re: [PATCH v2 02/13] dt-bindings: media: ti,j721e-csi2rx-shim: Support 32 dma chans

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On 27/06/2024 15:09, Jai Luthra wrote:
> The CSI2RX SHIM IP can support a maximum of 32x DMA channels.
> 
> These can be used to split incoming "streams" of data on the CSI-RX
> port, distinguished by MIPI Virtual Channel (or Data Type), into
> different locations in memory (/dev/videoX nodes).
> 
> Actual number of DMA channels reserved is different for each SoC
> integrating this IP, but a maximum of 32x channels are always available
> in this IP's register space, so set minimum as 1 and maximum as 32.
> 
> Link: https://www.ti.com/lit/pdf/spruiv7
> Signed-off-by: Jai Luthra <j-luthra@xxxxxx>
> ---
>  .../bindings/media/ti,j721e-csi2rx-shim.yaml       | 39 ++++++++++++++++++++--
>  1 file changed, 36 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/media/ti,j721e-csi2rx-shim.yaml b/Documentation/devicetree/bindings/media/ti,j721e-csi2rx-shim.yaml
> index f762fdc05e4d..0e00533c7b68 100644
> --- a/Documentation/devicetree/bindings/media/ti,j721e-csi2rx-shim.yaml
> +++ b/Documentation/devicetree/bindings/media/ti,j721e-csi2rx-shim.yaml
> @@ -20,11 +20,44 @@ properties:
>      const: ti,j721e-csi2rx-shim
>  
>    dmas:
> -    maxItems: 1
> +    minItems: 1
> +    maxItems: 32
>  
>    dma-names:
> +    minItems: 1
>      items:
>        - const: rx0

So all variants now get total random number of DMAs? I don't understand
why this is not constrained.

Best regards,
Krzysztof





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