linux-kernel - RE: [PATCH v3 1/4] dt-bindings: qcom,qcs615-venus: add support for video hardware

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Message-ID: <18cc654b4377463e8783de0b4659a27d@quicinc.com>
Date: Mon, 25 Nov 2024 15:49:31 +0000
From: "Renjiang Han (QUIC)" <quic_renjiang@...cinc.com>
To: Krzysztof Kozlowski <krzk@...nel.org>
CC: Stanimir Varbanov <stanimir.k.varbanov@...il.com>,
        "Vikash Garodia (QUIC)"
	<quic_vgarodia@...cinc.com>,
        "bryan.odonoghue@...aro.org"
	<bryan.odonoghue@...aro.org>,
        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-media@...r.kernel.org"
	<linux-media@...r.kernel.org>,
        "linux-arm-msm@...r.kernel.org"
	<linux-arm-msm@...r.kernel.org>,
        "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v3 1/4] dt-bindings: qcom,qcs615-venus: add support for
 video hardware

On Mon 11/25/2024 3:50 PM, Krzysztof Kozlowski wrote:
> On Mon, Nov 25, 2024 at 11:04:49AM +0530, Renjiang Han wrote:
> > Add support for Qualcomm video acceleration hardware used for video 
> > stream decoding and encoding on QCOM QCS615.
> > 
> > Signed-off-by: Renjiang Han <quic_renjiang@...cinc.com> >
> > ---
> >  .../bindings/media/qcom,qcs615-venus.yaml          | 182 +++++++++++++++++++++
> >  1 file changed, 182 insertions(+)
> > 
> > diff --git 
> > a/Documentation/devicetree/bindings/media/qcom,qcs615-venus.yaml 
> > b/Documentation/devicetree/bindings/media/qcom,qcs615-venus.yaml

> Dependency for this patch must be mentioned here.

> Amount of dependencies make it unmergeable and untesteable.
> I suggest decoupling dependencies by removing clock constants.

Thanks for your comment, I will try to remove the clock constants
and use clock id instead.

> > new file mode 100644
> > index 
> > 0000000000000000000000000000000000000000..7a3a01ff06d8b62bc2424a0a2485
> > 7c86c6865f89
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/qcom,qcs615-venus.yaml
> > @@ -0,0 +1,182 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) %YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/media/qcom,qcs615-venus.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Qualcomm QCS615 Venus video encode and decode accelerators
> > +
> > +maintainers:
> > +  - Stanimir Varbanov <stanimir.k.varbanov@...il.com> >
> > +  - Vikash Garodia <quic_vgarodia@...cinc.com> >
> > +
> > +description:
> > +  The Venus IP is a video encode and decode accelerator present
> > +  on Qualcomm platforms
> > +
> > +allOf:
> > +  - $ref: qcom,venus-common.yaml#
> > +
> > +properties:
> > +  compatible:
> > +    const: qcom,qcs615-venus
> > +
> > +  power-domains:
> > +    minItems: 2
> > +    maxItems: 3
> > +
> > +  power-domain-names:
> > +    minItems: 2
> > +    items:
> > +      - const: venus
> > +      - const: vcodec0
> > +      - const: cx
> > +
> > +  clocks:
> > +    maxItems: 5
> > +
> > +  clock-names:
> > +    items:
> > +      - const: core
> > +      - const: iface
> > +      - const: bus
> > +      - const: vcodec0_core
> > +      - const: vcodec0_bus
> > +
> > +  iommus:
> > +    maxItems: 1
> > +
> > +  memory-region:
> > +    maxItems: 1
> > +
> > +  interconnects:
> > +    maxItems: 2
> > +
> > +  interconnect-names:
> > +    items:
> > +      - const: video-mem
> > +      - const: cpu-cfg
> > +
> > +  operating-points-v2: true
> > +
> > +  opp-table:
> > +    type: object
> > +
> > +  video-decoder:
> > +    type: object
> > +
> > +    additionalProperties: false
> > +
> > +    properties:
> > +      compatible:
> > +        const: venus-decoder
> > +
> > +    required:
> > +      - compatible
> > +
> > +  video-encoder:
> > +    type: object

> Both nodes are useless - no resources here, nothing to control.
> Do not add nodes just to instantiate Linux drivers. Drop them.
Do you mean I should remove video-decoder and video-encoder from here?
If so, do I also need to remove these two nodes from the dtsi file and add
them in the qcs615-ride.dts file?

> Best regards,
> Krzysztof