linux-kernel - Re: [PATCH] ARM: dts: imx6sl: Add vivante gpu nodes

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Date:   Thu, 12 Jul 2018 15:54:28 +0200
From:   Lucas Stach <l.stach@...gutronix.de>
To:     Leonard Crestez <leonard.crestez@....com>,
        Shawn Guo <shawnguo@...nel.org>
Cc:     Russell King <linux+etnaviv@...linux.org.uk>,
        Christian Gmeiner <christian.gmeiner@...il.com>,
        Fabio Estevam <fabio.estevam@....com>,
        Marius Vlad <marius-cristian.vlad@....com>,
        etnaviv@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-imx@....com, kernel@...gutronix.de
Subject: Re: [PATCH] ARM: dts: imx6sl: Add vivante gpu nodes

Am Donnerstag, den 12.07.2018, 16:37 +0300 schrieb Leonard Crestez:
> The imx6sl soc has gpu_2d and gpu_vg, no 3d support:
> 
> etnaviv-gpu 2200000.gpu: model: GC320, revision: 5007
> etnaviv-gpu 2204000.gpu: model: GC355, revision: 1215
> 
> The IP blocks are close enough to supported hardware that they "just
> work" with etnaviv and x11.

According to the kernel log above, they aren't just close enough, but
actually the same revision as the cores on the i.MX6Q.

> Signed-off-by: Leonard Crestez <leonard.crestez@....com>

I think this DT is ordered by unit address, so both GPU nodes should
move to the end of the dts file, right?

With this fixed:
Reviewed-by: Lucas Stach <l.stach@...gutronix.de>

> 
> ---
>  arch/arm/boot/dts/imx6sl.dtsi | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> Tested by using yocto fsl community bsp built in "mainline" mode.
> This
> patch makes x11 start up and turning on drm.debug shows that the
> etnaviv
> driver is being used.
> 
> I don't know if such a patch requires much more testing: all it
> really
> does is "describe the hardware".
> 
> Patch is against shawguo/imx/dt, it depends on newly accepted
> commit 13211eec7b0e ("ARM: dts: imx6sl: Convert gpc to new bindings")
> This is only because of the way it references the PU power domain.
> 
> diff --git a/arch/arm/boot/dts/imx6sl.dtsi
> b/arch/arm/boot/dts/imx6sl.dtsi
> index a6bc21433839..49a56b4fd393 100644
> --- a/arch/arm/boot/dts/imx6sl.dtsi
> +++ b/arch/arm/boot/dts/imx6sl.dtsi
> @@ -130,10 +130,30 @@
>  			cache-level = <2>;
>  			arm,tag-latency = <4 2 3>;
>  			arm,data-latency = <4 2 3>;
>  		};
>  
> +		gpu_2d: gpu@...0000 {
> +			compatible = "vivante,gc";
> +			reg = <0x02200000 0x4000>;
> +			interrupts = <0 10 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&clks IMX6SL_CLK_MMDC_ROOT>,
> +				 <&clks IMX6SL_CLK_GPU2D_OVG>;
> +			clock-names = "bus", "core";
> +			power-domains = <&pd_pu>;
> +		};
> +
> +		gpu_vg: gpu@...4000 {
> +			compatible = "vivante,gc";
> +			reg = <0x02204000 0x4000>;
> +			interrupts = <0 11 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&clks IMX6SL_CLK_MMDC_ROOT>,
> +				 <&clks IMX6SL_CLK_GPU2D_OVG>;
> +			clock-names = "bus", "core";
> +			power-domains = <&pd_pu>;
> +		};
> +
>  		aips1: aips-bus@...0000 {
>  			compatible = "fsl,aips-bus", "simple-bus";
>  			#address-cells = <1>;
>  			#size-cells = <1>;
>  			reg = <0x02000000 0x100000>;