linux-kernel - Re: [PATCH v2 7/8] arm64: dts: qcom: sa8295p-adp: Enable GPU

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Message-ID: <20231227202130.GA1315173@hu-bjorande-lv.qualcomm.com>
Date: Wed, 27 Dec 2023 12:21:30 -0800
From: Bjorn Andersson <quic_bjorande@...cinc.com>
To: Konrad Dybcio <konrad.dybcio@...aro.org>
CC: Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette
	<mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Rob Herring
	<robh+dt@...nel.org>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, Taniya Das <quic_tdas@...cinc.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Johan Hovold <johan+linaro@...nel.org>,
        Catalin Marinas
	<catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-clk@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 7/8] arm64: dts: qcom: sa8295p-adp: Enable GPU

On Wed, Dec 27, 2023 at 02:09:47AM +0100, Konrad Dybcio wrote:
> On 22.12.2023 05:39, Bjorn Andersson wrote:
> > With the necessary support in place for supplying VDD_GFX from the
> > MAX20411 regulator, enable the GPU clock controller, GMU, Adreno SMMU
> > and the GPU on the SA8295P ADP.
> > 
> > Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
> > ---
> [...]
> 
> > +&gpucc {
> > +	vdd-gfx-supply = <&vdd_gfx>;
> > +	status = "okay";
> > +};
> Already enabled
> 

No, we're disabling these in sa8540p.dtsi, so they need to be re-enabled
here.

I don't remember if it's because the attempt to bring up gfx.lvl or if
it's the attempt to operate the GPU components without adequate VDD_GFX,
that is causing the issue...but either way, we don't survive boot.


It's possible that we could move the max20411 up to sa8540p.dtsi to
avoid the intermediate disable, but I'm not confident that it's "part of
the platform"...

Regards,
Bjorn

> > +
> > +&gmu {
> > +	status = "okay";
> > +};
> > +
> > +&gpu {
> > +	status = "okay";
> > +
> > +	zap-shader {
> > +		memory-region = <&gpu_mem>;
> > +		firmware-name = "qcom/sa8295p/a690_zap.mbn";
> > +	};
> > +};
> > +
> > +&gpu_smmu {
> > +	status = "okay";
> > +};
> Already enabled
> 
> 
> Konrad