linux-kernel - Re: [PATCH] arm64: dts: imx8mp-venice*: enable NPU support

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Message-ID: <CAJ+vNU0zZMcg3fFqZinx5cs0WGV4LGVByj=XEqn3mGt-Qa=xrg@mail.gmail.com>
Date: Tue, 10 Sep 2024 13:14:34 -0700
From: Tim Harvey <tharvey@...eworks.com>
To: Frieder Schrempf <frieder.schrempf@...tron.de>
Cc: Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
	Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>, Li Yang <leoyang.li@....com>, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, imx@...ts.linux.dev, 
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] arm64: dts: imx8mp-venice*: enable NPU support

On Mon, Sep 9, 2024 at 11:50 PM Frieder Schrempf
<frieder.schrempf@...tron.de> wrote:
>
> Hi Tim,
>
> On 09.09.24 11:53 PM, Tim Harvey wrote:
> > The IMX8MP has a VeriSilicon (Vivante VIP8000) NPU which
> > is supported by the etnaviv driver. Enable it.
> >
> > Signed-off-by: Tim Harvey <tharvey@...eworks.com>
> > ---
> >  arch/arm64/boot/dts/freescale/imx8mp-venice-gw702x.dtsi | 4 ++++
> >  arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts  | 4 ++++
> >  2 files changed, 8 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mp-venice-gw702x.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-venice-gw702x.dtsi
> > index 6c75a5ecf56b..f0211a96855b 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mp-venice-gw702x.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8mp-venice-gw702x.dtsi
> > @@ -393,6 +393,10 @@ &i2c3 {
> >       status = "okay";
> >  };
> >
> > +&npu {
> > +     status = "okay";
> > +};
> > +
> >  /* off-board header */
> >  &uart1 {
> >       pinctrl-names = "default";
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts b/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts
> > index 9885948952b4..8a04b66a4afc 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts
> > +++ b/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts
> > @@ -666,6 +666,10 @@ &i2c4 {
> >       status = "okay";
> >  };
> >
> > +&npu {
> > +     status = "okay";
> > +};
> > +
> >  &pcie_phy {
> >       fsl,refclk-pad-mode = <IMX8_PCIE_REFCLK_PAD_INPUT>;
> >       fsl,clkreq-unsupported;
>
> I think there is no need for this patch as the NPU is already enabled by
> default in imx8mp.dtsi (same as the GPUs). Or do you disable it in some
> intermediate devicetree include file?
>

Frieder,

Thanks for pointing this out... you are correct. I'm not sure why I
thought it needed to be explicitly enabled.

Please ignore this patch.

Best Regards,

Tim