linux-kernel - Re: [PATCH] dt-bindings: media: venus: Add sc7280 dt schema

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Date:   Wed, 12 May 2021 14:26:56 +0300
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     Dikshita Agarwal <dikshita@...eaurora.org>, andy.gross@...aro.org,
        david.brown@...aro.org, robh+dt@...nel.org, mark.rutland@....com,
        devicetree@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        vgarodia@...eaurora.org
Subject: Re: [PATCH] dt-bindings: media: venus: Add sc7280 dt schema



On 4/26/21 1:21 PM, Dikshita Agarwal wrote:
> Add a schema description for the venus video encoder/decoder on the sc7280.
> 
> Signed-off-by: Dikshita Agarwal <dikshita@...eaurora.org>
> ---
>  .../bindings/media/qcom,sc7280-venus.yaml          | 158 +++++++++++++++++++++
>  1 file changed, 158 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/qcom,sc7280-venus.yaml
> 
> diff --git a/Documentation/devicetree/bindings/media/qcom,sc7280-venus.yaml b/Documentation/devicetree/bindings/media/qcom,sc7280-venus.yaml
> new file mode 100644
> index 0000000..a258d97
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/qcom,sc7280-venus.yaml
> @@ -0,0 +1,158 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/media/qcom,sc7280-venus.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Qualcomm Venus video encode and decode accelerators
> +
> +maintainers:
> +  - Stanimir Varbanov <stanimir.varbanov@...aro.org>
> +
> +description: |
> +  The Venus IP is a video encode and decode accelerator present

Maybe we can mention that this is Venus Iris2 IP?

> +  on Qualcomm platforms
> +
> +properties:
> +  compatible:
> +    const: qcom,sc7280-venus
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  power-domains:
> +    minItems: 2
> +    maxItems: 3
> +
> +  power-domain-names:
> +    minItems: 2
> +    maxItems: 3
> +    items:
> +      - const: venus
> +      - const: vcodec0

The sm8250 (the same Iris2 IP) has one more MX power domain, I guess we
should have it here too?

> +
> +  clocks:
> +    maxItems: 5
> +
> +  clock-names:
> +    items:
> +      - const: core_clk
> +      - const: video_cc_mvsc_ctl_axi
> +      - const: iface_clk
> +      - const: vcodec_clk
> +      - const: video_cc_mvs0_ctl_axi

I'd suggest following names:
	core
	bus
	iface
	vcodec_core
	vcodec_bus

> +
> +  iommus:
> +    maxItems: 2
> +
> +  memory-region:
> +    maxItems: 1
> +
> +  interconnects:
> +    maxItems: 2
> +
> +  interconnect-names:
> +    items:
> +      - const: cpu-cfg
> +      - const: video-mem
> +
> +  video-decoder:
> +    type: object
> +
> +    properties:
> +      compatible:
> +        const: venus-decoder
> +
> +    required:
> +      - compatible
> +
> +    additionalProperties: false
> +
> +  video-encoder:
> +    type: object
> +
> +    properties:
> +      compatible:
> +        const: venus-encoder
> +
> +    required:
> +      - compatible
> +
> +    additionalProperties: false
> +
> +  video-firmware:
> +    type: object
> +
> +    description: |
> +      Firmware subnode is needed when the platform does not
> +      have TrustZone.
> +
> +    properties:
> +      iommus:
> +        maxItems: 1
> +
> +    required:
> +      - iommus
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - power-domains
> +  - power-domain-names
> +  - clocks
> +  - clock-names
> +  - iommus
> +  - memory-region
> +  - video-decoder
> +  - video-encoder
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +        #include <dt-bindings/clock/qcom,videocc-sc7280.h>
> +
> +        venus: video-codec@...0000 {
> +                compatible = "qcom,sc7280-venus";
> +                reg = <0x0aa00000 0xd0600>;
> +                interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
> +
> +                clocks = <&videocc VIDEO_CC_MVSC_CORE_CLK>,
> +                         <&videocc VIDEO_CC_MVSC_CTL_AXI_CLK>,
> +                         <&videocc VIDEO_CC_VENUS_AHB_CLK>,
> +                         <&videocc VIDEO_CC_MVS0_CORE_CLK>,
> +                         <&videocc VIDEO_CC_MVS0_AXI_CLK>;
> +                clock-names = "core_clk", "video_cc_mvsc_ctl_axi",
> +                              "iface_clk", "vcodec_clk",
> +                              "video_cc_mvs0_ctl_axi";
> +
> +                power-domains = <&videocc MVSC_GDSC>,
> +                                <&videocc MVS0_GDSC>;
> +                power-domain-names = "venus", "vcodec0";
> +
> +                interconnects = <&gem_noc MASTER_APPSS_PROC 0 &cnoc2 SLAVE_VENUS_CFG 0>
> +                                <&mmss_noc MASTER_VIDEO_P0 0 &mc_virt SLAVE_EBI1 0>;
> +                interconnect-names = "cpu-cfg", "video-mem";

Do we have sc7280 interconnect binding somewhere?

> +
> +                iommus = <&apps_smmu 0x2180 0x20>,
> +                         <&apps_smmu 0x2184 0x20>;
> +
> +                memory-region = <&video_mem>;
> +
> +                video-decoder {
> +                        compatible = "venus-decoder";
> +                };
> +
> +                video-encoder {
> +                        compatible = "venus-encoder";
> +                };
> +
> +                video-firmware {
> +                        iommus = <&apps_smmu 0x21a2 0x0>;
> +                };
> +        };
> 

-- 
regards,
Stan