linux-kernel - Re: [PATCH] ARM: tegra: nyan: Enable GPU node and related supply

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Date:   Tue, 20 Sep 2016 20:17:13 +0200
From:   Paul Kocialkowski <contact@...lk.fr>
To:     Jon Hunter <jonathanh@...dia.com>, linux-kernel@...r.kernel.org,
        Alexandre Courbot <gnurou@...il.com>,
        Thierry Reding <thierry.reding@...il.com>
Cc:     linux-tegra@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, Stephen Warren <swarren@...dotorg.org>
Subject: Re: [PATCH] ARM: tegra: nyan: Enable GPU node and related supply

Le mardi 20 septembre 2016 à 13:24 +0100, Jon Hunter a écrit :
> On 18/09/16 15:13, Paul Kocialkowski wrote:
> > 
> > This enables the GPU node for tegra124 nyan boards, which is required to
> > get graphics acceleration with nouveau on these devices.
> > 
> > Signed-off-by: Paul Kocialkowski <contact@...lk.fr>
> > ---
> >  arch/arm/boot/dts/tegra124-nyan.dtsi | 8 +++++++-
> >  1 file changed, 7 insertions(+), 1 deletion(-)
> > 
> > diff --git a/arch/arm/boot/dts/tegra124-nyan.dtsi
> > b/arch/arm/boot/dts/tegra124-nyan.dtsi
> > index dab9509..225ca77 100644
> > --- a/arch/arm/boot/dts/tegra124-nyan.dtsi
> > +++ b/arch/arm/boot/dts/tegra124-nyan.dtsi
> > @@ -42,6 +42,12 @@
> >  		};
> >  	};
> >  
> > +	gpu@0,57000000 {
> > +		status = "okay";
> > +
> > +		vdd-supply = <&vdd_gpu>;
> > +	};
> > +
> >  	serial@...06000 {
> >  		/* Debug connector on the bottom of the board near SD card.
> > */
> >  		status = "okay";
> > @@ -214,7 +220,7 @@
> >  					regulator-always-on;
> >  				};
> >  
> > -				sd6 {
> > +				vdd_gpu: sd6 {
> >  					regulator-name = "+VDD_GPU_AP";
> >  					regulator-min-microvolt = <650000>;
> >  					regulator-max-microvolt =
> > <1200000>;
> > 
> 
> Looks good to me. I see the following error when booting but looking at the
> code appears to be benign. Thierry, Alex, is this normal/okay?

I have the same messages and asked Alexandre about them the other day. He told
me that it looks normal.

> [    5.715181] nouveau 57000000.gpu: NVIDIA GK20A
> (0ea000a1)                                                                    
>                         
> [    5.720625] nouveau 57000000.gpu: imem: using
> IOMMU                                                                         
>                          
> [    5.803694] nouveau 57000000.gpu: DRM: VRAM: 0
> MiB                                                                           
>                         
> [    5.808501] nouveau 57000000.gpu: DRM: GART: 1048576
> MiB                                                                           
>                   
> [    5.816000] nouveau 57000000.gpu: DRM: failed to create ce channel,
> -22                                                                           
>    
> [    5.924140] nouveau 57000000.gpu: DRM: MM: using GRCE for buffer copies  
> 
> Cheers
> Jon
> 
-- 
Paul Kocialkowski, developer of low-level free software for embedded devices

Website: https://www.paulk.fr/
Coding blog: https://code.paulk.fr/
Git repositories: https://git.paulk.fr/ https://git.code.paulk.fr/
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