linux-kernel - Re: [PATCH v4] arm64: dts: qcom: sc7280: Add venus DT node

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Date:   Tue, 15 Jun 2021 03:02:46 +0200
From:   Konrad Dybcio <konrad.dybcio@...ainline.org>
To:     Dikshita Agarwal <dikshita@...eaurora.org>, david.brown@...aro.org,
        robh+dt@...nel.org, mark.rutland@....com,
        devicetree@...r.kernel.org, stanimir.varbanov@...aro.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        vgarodia@...eaurora.org
Subject: Re: [PATCH v4] arm64: dts: qcom: sc7280: Add venus DT node

Hi,


> @@ -850,6 +855,76 @@
>  			interrupts = <GIC_SPI 582 IRQ_TYPE_LEVEL_HIGH>;
>  		};
>  
> +		venus: video-codec@...00000 {

Please remove the leading 0 after the "@" sign



> +			compatible = "qcom,sc7280-venus";
> +			reg = <0 0x0aa00000 0 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", "bus", "iface",
> +				      "vcodec_core", "vcodec_bus";
> +
> +			power-domains = <&videocc MVSC_GDSC>,
> +					<&videocc MVS0_GDSC>;
> +					<&rpmhpd SC7280_CX>;
> +			power-domain-names = "venus", "vcodec0", "cx";

Unless there was a newer revision of [1], the cx pd will most likely

be unused due to it not being specified under opp_pmdomain.



> +			operating-points-v2 = <&venus_opp_table>;
> +
> +			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";
> +
> +			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>;
> +			};
> +
> +			venus_opp_table: venus-opp-table {
> +				compatible = "operating-points-v2";
> +
> +				opp-133330000 {
> +					opp-hz = /bits/ 64 <133330000>;
> +					required-opps = <&rpmhpd_opp_low_svs>;
> +				};
> +
> +				opp-240000000 {
> +					opp-hz = /bits/ 64 <240000000>;
> +					required-opps = <&rpmhpd_opp_svs>;
> +				};
> +
> +				opp-335000000 {
> +					opp-hz = /bits/ 64 <335000000>;
> +					required-opps = <&rpmhpd_opp_svs_l1>;
> +				};
> +
> +				opp-424000000 {
> +					opp-hz = /bits/ 64 <424000000>;
> +					required-opps = <&rpmhpd_opp_nom>;
> +				};
> +
> +				opp-460000000 {
> +					opp-hz = /bits/ 64 <460000000>;
> +					required-opps = <&rpmhpd_opp_turbo>;
> +				};
> +			};
> +
> +		};
>
>
Is there a downstream kernel source available for sc7280 to compare against?

I don't see it in sm8350 releases and it's hard to tell out of thin air what values

should be in there.. Unless qcom decides to share some documentation ;)


Besides that, I don't see the driver part being merged neither in linux-next, nor media-next but I may be looking at the wrong tree.


[1] https://lkml.org/lkml/2021/5/19/364


Konrad