linux-kernel - Re: [PATCH v1 3/4] arm64: dts: rockchip: rk3588-rock5b: Enable GPU

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Message-ID: <20240325180117.39d72749@collabora.com>
Date: Mon, 25 Mar 2024 18:01:17 +0100
From: Boris Brezillon <boris.brezillon@...labora.com>
To: Sebastian Reichel <sebastian.reichel@...labora.com>
Cc: Heiko Stuebner <heiko@...ech.de>, linux-rockchip@...ts.infradead.org,
 Rob Herring <robh+dt@...nel.org>, Krzysztof Kozlowski
 <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 kernel@...labora.com
Subject: Re: [PATCH v1 3/4] arm64: dts: rockchip: rk3588-rock5b: Enable GPU

On Mon, 25 Mar 2024 16:58:47 +0100
Sebastian Reichel <sebastian.reichel@...labora.com> wrote:

> Hi,
> 
> On Mon, Mar 25, 2024 at 04:44:41PM +0100, Boris Brezillon wrote:
> > On Mon, 25 Mar 2024 16:37:20 +0100
> > Sebastian Reichel <sebastian.reichel@...labora.com> wrote:
> >   
> > > From: Boris Brezillon <boris.brezillon@...labora.com>
> > > 
> > > Enable the Mali GPU in the Rock 5B.
> > > 
> > > Signed-off-by: Boris Brezillon <boris.brezillon@...labora.com>  
> > 
> > I don't remember writing this patch ;-), maybe I screwed authorship at
> > some point, dunno.  
> 
> mh, I cherry-picked the DT patches from your branch before
> cleaning them up.

Yep,  I probably wrote this patch and asked someone else to test. I
couldn't find any traces of this patch where I'm not flagged as the
author in any of my local branches.

> 
> > > Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
> > > ---
> > >  arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts | 6 ++++++
> > >  1 file changed, 6 insertions(+)
> > > 
> > > diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
> > > index 1fe8b2a0ed75..096ee7a98b89 100644
> > > --- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
> > > +++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
> > > @@ -180,6 +180,11 @@ &cpu_l3 {
> > >  	cpu-supply = <&vdd_cpu_lit_s0>;
> > >  };
> > >  
> > > +&gpu {
> > > +	mali-supply = <&vdd_gpu_s0>;
> > > +	status = "okay";
> > > +};
> > > +
> > >  &i2c0 {
> > >  	pinctrl-names = "default";
> > >  	pinctrl-0 = <&i2c0m2_xfer>;
> > > @@ -470,6 +475,7 @@ rk806_dvs3_null: dvs3-null-pins {
> > >  
> > >  		regulators {
> > >  			vdd_gpu_s0: vdd_gpu_mem_s0: dcdc-reg1 {
> > > +				regulator-always-on;  
> > 
> > Hm, should we mention why the regulator is always on here?  
> 
> In case of the EVB1 it's needed because the generic coupler driver
> cannot handle regulators that are not always on.

Ah, okay. I thought I added that for a different reason.

> I'm not sure why
> it was added for the Rock 5B. I will check if it works without that
> flag.