linux-kernel - Re: [PATCH v6 4/8] arm64: dts: Add DT node for the VIPNano-QI on the A311D

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Date:   Mon, 2 Jan 2023 11:17:02 +0100
From:   Tomeu Vizoso <tomeu.vizoso@...labora.com>
To:     neil.armstrong@...aro.org
Cc:     italonicola@...labora.com, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list:ARM/Amlogic Meson SoC support" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Amlogic Meson SoC support" 
        <linux-amlogic@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 4/8] arm64: dts: Add DT node for the VIPNano-QI on the
 A311D

On 1/2/23 10:53, Neil Armstrong wrote:
> On 02/12/2022 12:52, Tomeu Vizoso wrote:
>> This "NPU" is very similar to the Vivante GPUs and Etnaviv works well
>> with it with just a few small changes.
>>
>> v2: Add reference to RESET_NNA (Neil)
>> v3: Fix indentation (Neil)
>>
>> Signed-off-by: Tomeu Vizoso <tomeu.vizoso@...labora.com>
>> Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>
>> ---
>>   arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi     | 11 +++++++++++
>>   .../boot/dts/amlogic/meson-g12b-a311d-khadas-vim3.dts |  4 ++++
>>   2 files changed, 15 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi 
>> b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
>> index 45947c1031c4..61c8461df614 100644
>> --- a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
>> +++ b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
>> @@ -11,6 +11,7 @@
>>   #include <dt-bindings/interrupt-controller/arm-gic.h>
>>   #include <dt-bindings/reset/amlogic,meson-g12a-reset.h>
>>   #include <dt-bindings/thermal/thermal.h>
>> +#include <dt-bindings/power/meson-g12a-power.h>
>>   / {
>>       interrupt-parent = <&gic>;
>> @@ -2484,4 +2485,14 @@ xtal: xtal-clk {
>>           #clock-cells = <0>;
>>       };
>> +    npu: npu@...00000 {
>> +        compatible = "vivante,gc";
>> +        reg = <0x0 0xff100000 0x0 0x20000>;
>> +        interrupts = <0 147 4>;
>> +        clocks = <&clkc CLKID_NNA_CORE_CLK>,
>> +             <&clkc CLKID_NNA_AXI_CLK>;
>> +        clock-names = "core", "bus";
>> +        resets = <&reset RESET_NNA>;
>> +        power-domains = <&pwrc PWRC_G12A_NNA_ID>;
> 
> A status = "disable" is missing here.
> 
>> +    };
>>   };
>> diff --git 
>> a/arch/arm64/boot/dts/amlogic/meson-g12b-a311d-khadas-vim3.dts 
>> b/arch/arm64/boot/dts/amlogic/meson-g12b-a311d-khadas-vim3.dts
>> index 124a80901084..73f3d87dcefd 100644
>> --- a/arch/arm64/boot/dts/amlogic/meson-g12b-a311d-khadas-vim3.dts
>> +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-a311d-khadas-vim3.dts
>> @@ -15,6 +15,10 @@ / {
>>       compatible = "khadas,vim3", "amlogic,a311d", "amlogic,g12b";
>>   };
>> +&npu {
>> +    status = "okay";
> 
> Tomeu, I think until the user-space stack is clean this should be removed
> and left disabled.

Sounds good to me, we can easily carry a patch in Mesa CI in the meantime.

> I can fix this while applying if you want,

I would appreciate it, thanks!

Tomeu

> Neil
> 
>> +};
>> +
>>   /*
>>    * The VIM3 on-board  MCU can mux the PCIe/USB3.0 shared differential
>>    * lines using a FUSB340TMX USB 3.1 SuperSpeed Data Switch between
>