linux-kernel - Re: [PATCH 3/4] arm64: dts: qcom: sa8775p: add support for video node

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Message-ID: <5qfe4gnjnttnpezj36rdsdbomghnz5ytj3hiecoingj7622o5a@h4tq4tzliwz4>
Date: Sat, 15 Mar 2025 20:32:32 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Cc: Vikash Garodia <quic_vgarodia@...cinc.com>,
        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 3/4] arm64: dts: qcom: sa8775p: add support for video node

On Sat, Mar 15, 2025 at 02:43:30PM +0100, Konrad Dybcio wrote:
> On 3/11/25 1:03 PM, Vikash Garodia wrote:
> > Video node enables video on Qualcomm SA8775P platform.
> > 
> > Signed-off-by: Vikash Garodia <quic_vgarodia@...cinc.com>
> > ---
> >  arch/arm64/boot/dts/qcom/sa8775p.dtsi | 67 +++++++++++++++++++++++++++++++++++
> >  1 file changed, 67 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/qcom/sa8775p.dtsi b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
> > index 3394ae2d13003417a15e64c9e47833725ec779e6..09db8e2eb578f1cada0f4a15e3f844dc097bd46d 100644
> > --- a/arch/arm64/boot/dts/qcom/sa8775p.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
> > @@ -10,6 +10,7 @@
> >  #include <dt-bindings/clock/qcom,sa8775p-dispcc.h>
> >  #include <dt-bindings/clock/qcom,sa8775p-gcc.h>
> >  #include <dt-bindings/clock/qcom,sa8775p-gpucc.h>
> > +#include <dt-bindings/clock/qcom,sa8775p-videocc.h>
> >  #include <dt-bindings/dma/qcom-gpi.h>
> >  #include <dt-bindings/interconnect/qcom,sa8775p-rpmh.h>
> >  #include <dt-bindings/mailbox/qcom-ipcc.h>
> > @@ -3783,6 +3784,72 @@ llcc: system-cache-controller@...0000 {
> >  			interrupts = <GIC_SPI 580 IRQ_TYPE_LEVEL_HIGH>;
> >  		};
> >  
> > +		iris: video-codec@...0000 {
> > +			compatible = "qcom,sa8775p-iris";
> > +
> > +			reg = <0 0x0aa00000 0 0xf0000>;
> > +			interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
> > +
> > +			power-domains = <&videocc VIDEO_CC_MVS0C_GDSC>,
> > +					<&videocc VIDEO_CC_MVS0_GDSC>,
> > +					<&rpmhpd SA8775P_MXC>,
> > +					<&rpmhpd SA8775P_MMCX>;
> > +			power-domain-names = "venus",
> > +					     "vcodec0",
> > +					     "mx",
> > +					     "mmcx";
> > +			operating-points-v2 = <&iris_opp_table>;
> > +
> > +			clocks = <&gcc GCC_VIDEO_AXI0_CLK>,
> > +				 <&videocc VIDEO_CC_MVS0C_CLK>,
> > +				 <&videocc VIDEO_CC_MVS0_CLK>;
> > +			clock-names = "iface",
> > +				      "core",
> > +				      "vcodec0_core";
> > +
> > +			interconnects = <&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ALWAYS
> > +					&config_noc SLAVE_VENUS_CFG QCOM_ICC_TAG_ALWAYS>,
> 
> This path should use QCOM_ICC_TAG_ACTIVE_ONLY on both endpoints
> 
> > +					<&mmss_noc MASTER_VIDEO_P0 QCOM_ICC_TAG_ALWAYS
> > +					&mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>;
> > +			interconnect-names = "cpu-cfg",
> > +					     "video-mem";
> > +
> > +			firmware-name = "qcom/vpu/vpu30_p4_s6.mbn";

Firmware-name should be a part of the board DT file rather than the SoC
DT.

> 
> If it needs different firmware, I have my doubts over why 8550's data
> would be fully reused. Are you sure everything in iris_platform_sm8550.c
> applies?

If I understand correctly, the firmware is different, because the
signature profile is different. The Iris core should be compatible.

> 
> > +			memory-region = <&pil_video_mem>;
> > +
> > +			resets = <&gcc GCC_VIDEO_AXI0_CLK_ARES>;
> > +			reset-names = "bus";
> > +
> > +			iommus = <&apps_smmu 0x0880 0x0400>,
> > +				 <&apps_smmu 0x0887 0x0400>;
> > +			dma-coherent;
> > +
> > +			iris_opp_table: opp-table {
> > +				compatible = "operating-points-v2";
> > +
> > +				opp-366000000 {
> > +					opp-hz = /bits/ 64 <366000000>;
> > +					required-opps = <&rpmhpd_opp_svs_l1>,
> > +							<&rpmhpd_opp_svs_l1>;
> > +				};
> 
> Please add a newline between subsequent subnodes
> 
> Konrad

-- 
With best wishes
Dmitry