linux-kernel - Re: [PATCH v1 3/3] arm64: dts: qcom: x1e80100: Add gpu support

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Message-ID: <20240623151630.bskqwqhp25mu3yuf@hu-akhilpo-hyd.qualcomm.com>
Date: Sun, 23 Jun 2024 20:46:30 +0530
From: Akhil P Oommen <quic_akhilpo@...cinc.com>
To: Krzysztof Kozlowski <krzk@...nel.org>
CC: freedreno <freedreno@...ts.freedesktop.org>,
        <dri-devel@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
        Rob Clark
	<robdclark@...il.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Krzysztof
 Kozlowski <krzk+dt@...nel.org>,
        Rob Herring <robh@...nel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 3/3] arm64: dts: qcom: x1e80100: Add gpu support

On Sun, Jun 23, 2024 at 02:53:17PM +0200, Krzysztof Kozlowski wrote:
> On 23/06/2024 14:28, Akhil P Oommen wrote:
> > On Sun, Jun 23, 2024 at 01:17:16PM +0200, Krzysztof Kozlowski wrote:
> >> On 23/06/2024 13:06, Akhil P Oommen wrote:
> >>> Add the necessary dt nodes for gpu support in X1E80100.
> >>>
> >>> Signed-off-by: Akhil P Oommen <quic_akhilpo@...cinc.com>
> >>> ---
> >>> +		gmu: gmu@...a000 {
> >>> +			compatible = "qcom,adreno-gmu-x185.1", "qcom,adreno-gmu";
> >>> +			reg = <0x0 0x03d50000 0x0 0x10000>,
> >>> +			      <0x0 0x03d6a000 0x0 0x35000>,
> >>> +			      <0x0 0x0b280000 0x0 0x10000>;
> >>> +			reg-names =  "rscc", "gmu", "gmu_pdc";
> >>
> >> Really, please start testing your patches. Your internal instructions
> >> tells you to do that, so please follow it carefully. Don't use the
> >> community as the tool, because you do not want to run checks and
> >> investigate results.
> > 
> > This was obviously tested before (and retested now) and everything works. I am
> > confused about what you meant. Could you please elaborate a bit? The device
> > and the compilation/test setup is new for me, so I am wondering if I
> > made any silly mistake!
> 
> Eh, your DTS is not correct, but this could not be pointed out by tests,
> because the binding does not work. :(

I reordered both "reg" and "reg-names" arrays based on the address. Not sure if
that is what we are talking about here. Gpu driver uses platform_get_resource_byname()
to query mmio resources.

I will retest dt-bindings and dts checks after picking the patches you
just posted and report back. Is the schema supposed to enforce strict
order?

-Akhil.
> 
> I'll fix up the binding and then please test on top of my patch (see
> your internal guideline about necessary tests before sending any binding
> or DTS patch).
> 
> Best regards,
> Krzysztof
>