linux-kernel - Re: [PATCH 2/4] dt-bindings: media: qcom,sm8550-iris: document SA8775p IRIS accelerator

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Message-ID: <ngzl7q3fli3bpuo5gjvppfrsnmlw6viy26ieqwhpfokgue2uxm@whomn2h6h3a7>
Date: Tue, 11 Mar 2025 17:31:57 +0200
From: Dmitry Baryshkov <lumag@...nel.org>
To: Vikash Garodia <quic_vgarodia@...cinc.com>
Cc: Dikshita Agarwal <quic_dikshita@...cinc.com>, 
	Abhinav Kumar <quic_abhinavk@...cinc.com>, Mauro Carvalho Chehab <mchehab@...nel.org>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>, 
	Konrad Dybcio <konradybcio@...nel.org>, linux-arm-msm@...r.kernel.org, linux-media@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] dt-bindings: media: qcom,sm8550-iris: document
 SA8775p IRIS accelerator

On Tue, Mar 11, 2025 at 05:33:54PM +0530, Vikash Garodia wrote:
> Document the IRIS video decoder and encoder accelerator found in the
> SA8775P platform. SA8775P has collapsible MX compared to SM8550.

How compatible is SA8775P to SM8550? Should it be using a fallback
compatible?

This kind of comes as a more generic question: is there anything like
'IP version' or 'core version'? It would be really nice to determine the
'baseline' SoCs and make other instances compatible with the baseline.

> 
> Signed-off-by: Vikash Garodia <quic_vgarodia@...cinc.com>
> ---
>  Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml b/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml
> index 440a0d7cdfe19a1ccedefc207d96b26eed5d6630..20ac596638ba33f49cce9e42d70d31a8aaa7c36e 100644
> --- a/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml
> +++ b/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml
> @@ -19,7 +19,9 @@ allOf:
>  
>  properties:
>    compatible:
> -    const: qcom,sm8550-iris
> +    enum:
> +      - qcom,sm8550-iris
> +      - qcom,sa8775p-iris
>  
>    power-domains:
>      maxItems: 4
> 
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry