linux-kernel - Re: [PATCH 2/4] arm64: dts: rockchip: Add RGA support to the PX30

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Date:   Thu, 16 Apr 2020 15:24:42 +0200
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     Johan Jonker <jbx6244@...il.com>
Cc:     linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Jacob Chen <jacob-chen@...wrt.com>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Heiko Stuebner <heiko@...ech.de>,
        Hans Verkuil <hansverk@...co.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH 2/4] arm64: dts: rockchip: Add RGA support to the PX30

Hi,

On Thu 16 Apr 20, 15:02, Johan Jonker wrote:
> Hi Paul,
> 
> The conversion of rockchip-rga.txt to rockchip-rga.yaml by myself just
> has been approved by robh.

Huh, I looked around for ongoing related work but missed it.
I'll definitely rebase on top of your series and use the yaml description
instead. Thanks!

> Maybe place dts patches at the end of a patch serie.
> Could you include a &rga patch if your device is supported in mainline,
> so we can test with:
> make ARCH=arm64 dtbs_check
> DT_SCHEMA_FILES=Documentation/devicetree/bindings/media/rockchip-rga.yaml

I tested with the PX30 EVB so I can surely add a node there if that turns
out necessary (see below).

> Johan
> 
> On 4/16/20 1:50 PM, Paul Kocialkowski wrote:
> > The PX30 features a RGA block: add the necessary node to support it.
> > 
> > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
> > ---
> >  arch/arm64/boot/dts/rockchip/px30.dtsi | 11 +++++++++++
> >  1 file changed, 11 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/rockchip/px30.dtsi b/arch/arm64/boot/dts/rockchip/px30.dtsi
> > index 75908c587511..4bfbee9d4123 100644
> > --- a/arch/arm64/boot/dts/rockchip/px30.dtsi
> > +++ b/arch/arm64/boot/dts/rockchip/px30.dtsi
> > @@ -1104,6 +1104,17 @@ vopl_mmu: iommu@...70f00 {
> >  		status = "disabled";
> >  	};
> >  
> > +	rga: rga@...80000 {
> > +		compatible = "rockchip,px30-rga";
> > +		reg = <0x0 0xff480000 0x0 0x10000>;
> > +		interrupts = <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH 0>;
> > +		clocks = <&cru ACLK_RGA>, <&cru HCLK_RGA>, <&cru SCLK_RGA_CORE>;
> > +		clock-names = "aclk", "hclk", "sclk";
> > +		resets = <&cru SRST_RGA>, <&cru SRST_RGA_A>, <&cru SRST_RGA_H>;
> > +		reset-names = "core", "axi", "ahb";
> > +		power-domains = <&power PX30_PD_VO>;
> 
> 		status = "disabled";

As of 5.6, the rk3399 has the node enabled by default. Did that change?

Since it's a standalone block that has no I/O dependency, I don't really see
the point of disabling it by default.

What do you think?

Cheers,

Paul

> > +	};
> > +
> >  	qos_gmac: qos@...18000 {
> >  		compatible = "syscon";
> >  		reg = <0x0 0xff518000 0x0 0x20>;
> > 
> 

-- 
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

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