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

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Message-ID: <19f30d4c-d879-ce2f-1cd7-ebcb941bbcec@linaro.org>
Date:   Tue, 23 May 2023 14:56:25 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Bjorn Andersson <andersson@...nel.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 23.05.2023 14:28, Bjorn Andersson wrote:
> 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.
Another "messed up automotive forks" situation, eh..
Would it take a lot of new code to configure these platforms correctly?

Konrad
> 
> 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";
>>>  };