linux-kernel - Re: [PATCH v3] arm64: dts: qcom: disable GPU on x1e80100 by default

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Message-ID: <0ef30daf-67c3-4c25-b202-1312a2b23b1b@linaro.org>
Date: Tue, 16 Jul 2024 08:34:40 +0200
From: Caleb Connolly <caleb.connolly@...aro.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konrad.dybcio@...aro.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Akhil P Oommen <quic_akhilpo@...cinc.com>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] arm64: dts: qcom: disable GPU on x1e80100 by default



On 15/07/2024 21:17, Dmitry Baryshkov wrote:
> The GPU on X1E80100 requires ZAP 'shader' file to be useful. Since the
> file is signed by the OEM keys and might be not available by default,
> disable the GPU node and drop the firmware name from the x1e80100.dtsi
> file. Devices not being fused to use OEM keys can specify generic
> location at `qcom/x1e80100/gen70500_zap.mbn` while enabling the GPU.
> 
> The CRD and QCP were lucky enough to work with the default settings, so
> reenable the GPU on those platforms and provide correct firmware-name
> (including the SoC subdir).
> 
> Fixes: 721e38301b79 ("arm64: dts: qcom: x1e80100: Add gpu support")
> Cc: Akhil P Oommen <quic_akhilpo@...cinc.com>
> Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

Reviewed-by: Caleb Connolly <caleb.connolly@...aro.org>
> ---
> Changes in v3:
> - Fix the status property name (Akhil)
> - Also keep the GPU enabled on QCP (Akhil)
> - Link to v2: https://lore.kernel.org/r/20240715-x1e8-zap-name-v2-1-a82488e7f7c1@linaro.org
> 
> Changes in v2:
> - Keep GPU enabled for X1E80100-CRD (Johan)
> - Link to v1: https://lore.kernel.org/r/20240715-x1e8-zap-name-v1-1-b66df09d0b65@linaro.org
> ---
>   arch/arm64/boot/dts/qcom/x1e80100-crd.dts | 8 ++++++++
>   arch/arm64/boot/dts/qcom/x1e80100-qcp.dts | 8 ++++++++
>   arch/arm64/boot/dts/qcom/x1e80100.dtsi    | 3 ++-
>   3 files changed, 18 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/x1e80100-crd.dts b/arch/arm64/boot/dts/qcom/x1e80100-crd.dts
> index 6152bcd0bc1f..81d7ec82a845 100644
> --- a/arch/arm64/boot/dts/qcom/x1e80100-crd.dts
> +++ b/arch/arm64/boot/dts/qcom/x1e80100-crd.dts
> @@ -637,6 +637,14 @@ vreg_l3j_0p8: ldo3 {
>   	};
>   };
>   
> +&gpu {
> +	status = "okay";
> +
> +	zap-shader {
> +		firmware-name = "qcom/x1e80100/gen70500_zap.mbn";
> +	};
> +};
> +
>   &i2c0 {
>   	clock-frequency = <400000>;
>   
> diff --git a/arch/arm64/boot/dts/qcom/x1e80100-qcp.dts b/arch/arm64/boot/dts/qcom/x1e80100-qcp.dts
> index 72a4f4138616..b3521ec4879c 100644
> --- a/arch/arm64/boot/dts/qcom/x1e80100-qcp.dts
> +++ b/arch/arm64/boot/dts/qcom/x1e80100-qcp.dts
> @@ -606,6 +606,14 @@ vreg_l3j_0p8: ldo3 {
>   	};
>   };
>   
> +&gpu {
> +	status = "okay";
> +
> +	zap-shader {
> +		firmware-name = "qcom/x1e80100/gen70500_zap.mbn";
> +	};
> +};
> +
>   &lpass_tlmm {
>   	spkr_01_sd_n_active: spkr-01-sd-n-active-state {
>   		pins = "gpio12";
> diff --git a/arch/arm64/boot/dts/qcom/x1e80100.dtsi b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
> index 7bca5fcd7d52..8df90d01eba8 100644
> --- a/arch/arm64/boot/dts/qcom/x1e80100.dtsi
> +++ b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
> @@ -3155,9 +3155,10 @@ gpu: gpu@...0000 {
>   			interconnects = <&gem_noc MASTER_GFX3D 0 &mc_virt SLAVE_EBI1 0>;
>   			interconnect-names = "gfx-mem";
>   
> +			status = "disabled";
> +
>   			zap-shader {
>   				memory-region = <&gpu_microcode_mem>;
> -				firmware-name = "qcom/gen70500_zap.mbn";
>   			};
>   
>   			gpu_opp_table: opp-table {
> 
> ---
> base-commit: 3fe121b622825ff8cc995a1e6b026181c48188db
> change-id: 20240715-x1e8-zap-name-7b3c79234401
> 
> Best regards,

-- 
// Caleb (they/them)