linux-kernel - Re: [PATCH v2 3/3] arm64: dts: qcom: sc8280xp: Enable GPU related nodes

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Date:   Tue, 23 May 2023 05:28:42 -0700
From:   Bjorn Andersson <andersson@...nel.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     Bjorn Andersson <quic_bjorande@...cinc.com>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>,
        Akhil P Oommen <quic_akhilpo@...cinc.com>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, johan@...nel.org, mani@...nel.org
Subject: Re: [PATCH v2 3/3] arm64: dts: qcom: sc8280xp: Enable GPU related
 nodes

On Tue, May 23, 2023 at 10:04:40AM +0200, Konrad Dybcio wrote:
> 
> 
> On 23.05.2023 03:15, Bjorn Andersson wrote:
> > From: Bjorn Andersson <bjorn.andersson@...aro.org>
> > 
> > Add memory reservation for the zap-shader and enable the Adreno SMMU,
> > GPU clock controller, GMU and the GPU nodes for the SC8280XP CRD and the
> > Lenovo ThinkPad X13s.
> > 
> > Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> > Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
> > ---
> > 
> > Changes since v1:
> > - None
> > 
> >  arch/arm64/boot/dts/qcom/sc8280xp-crd.dts     | 26 +++++++++++++++++++
> >  .../qcom/sc8280xp-lenovo-thinkpad-x13s.dts    | 26 +++++++++++++++++++
> >  2 files changed, 52 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
> > index 5b25d54b9591..547277924ea3 100644
> > --- a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
> > +++ b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
> > @@ -210,6 +210,11 @@ vreg_wwan: regulator-wwan {
> >  	};
> >  
> >  	reserved-memory {
> > +		gpu_mem: gpu-mem@...00000 {
> The ZAP region is very seldom moved around, and I wouldn't expect it
> to be uncommon among the very usecase-specific 8280 machines.
> 
> > +			reg = <0 0x8bf00000 0 0x2000>;
> > +			no-map;
> > +		};
> > +
> >  		linux,cma {
> >  			compatible = "shared-dma-pool";
> >  			size = <0x0 0x8000000>;
> > @@ -259,6 +264,10 @@ usb1_sbu_mux: endpoint {
> >  	};
> >  };
> >  
> > +&adreno_smmu {
> > +	status = "okay";
> > +};
> Ugh. Should definitely be enabled by default.
> 
> > +
> >  &apps_rsc {
> >  	regulators-0 {
> >  		compatible = "qcom,pm8350-rpmh-regulators";
> > @@ -376,6 +385,23 @@ &dispcc0 {
> >  	status = "okay";
> >  };
> >  
> > +&gmu {
> > +	status = "okay";
> > +};
> You can keep the GMU enabled by default as well, it won't "probe" on
> its own (the GPU's hw_init calls its registration)
> 
> > +
> > +&gpu {
> > +	status = "okay";
> > +
> > +	zap-shader {
> > +		memory-region = <&gpu_mem>;
> > +		firmware-name = "qcom/sc8280xp/qcdxkmsuc8280.mbn";
> > +	};
> > +};
> > +
> > +&gpucc {
> > +	status = "okay";
> > +};
> Clock controllers have no reason to be off by default.
> 

On sa8295p/sa8540p the GPU is powered differently, so if I leave it
enabled by default I need to disable it (or configure it) for those, or
they won't boot.

Regards,
Bjorn

> Konrad
> > +
> >  &mdss0 {
> >  	status = "okay";
> >  };
> > diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
> > index bdcba719fc38..5ef3f4c07d75 100644
> > --- a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
> > +++ b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
> > @@ -264,6 +264,11 @@ vreg_wwan: regulator-wwan {
> >  	};
> >  
> >  	reserved-memory {
> > +		gpu_mem: gpu-mem@...00000 {
> > +			reg = <0 0x8bf00000 0 0x2000>;
> > +			no-map;
> > +		};
> > +
> >  		linux,cma {
> >  			compatible = "shared-dma-pool";
> >  			size = <0x0 0x8000000>;
> > @@ -359,6 +364,10 @@ usb1_sbu_mux: endpoint {
> >  	};
> >  };
> >  
> > +&adreno_smmu {
> > +	status = "okay";
> > +};
> > +
> >  &apps_rsc {
> >  	regulators-0 {
> >  		compatible = "qcom,pm8350-rpmh-regulators";
> > @@ -518,6 +527,23 @@ &dispcc0 {
> >  	status = "okay";
> >  };
> >  
> > +&gmu {
> > +	status = "okay";
> > +};
> > +
> > +&gpu {
> > +	status = "okay";
> > +
> > +	zap-shader {
> > +		memory-region = <&gpu_mem>;
> > +		firmware-name = "qcom/sc8280xp/LENOVO/21BX/qcdxkmsuc8280.mbn";
> > +	};
> > +};
> > +
> > +&gpucc {
> > +	status = "okay";
> > +};
> > +
> >  &mdss0 {
> >  	status = "okay";
> >  };