linux-kernel - Re: [PATCH v4 5/5] arm64: dts: qcom: Add Lenovo ThinkBook 16 G7 QOY device tree

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Message-ID: <152f5150-30b0-400c-9816-13e4710a4156@oss.qualcomm.com>
Date: Tue, 27 May 2025 12:55:06 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Rob Clark <robdclark@...il.com>,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Aleksandrs Vinarskis <alex.vinarskis@...il.com>,
        jens.glathe@...schoolsolutions.biz,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Douglas Anderson <dianders@...omium.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Jessica Zhang <quic_jesszhan@...cinc.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Johan Hovold <johan+linaro@...nel.org>,
        linux-usb@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v4 5/5] arm64: dts: qcom: Add Lenovo ThinkBook 16 G7 QOY
 device tree

On 5/26/25 5:28 PM, Rob Clark wrote:
> On Mon, May 26, 2025 at 1:36 AM Dmitry Baryshkov
> <dmitry.baryshkov@....qualcomm.com> wrote:
>>
>> On Sun, May 25, 2025 at 09:43:36PM +0200, Aleksandrs Vinarskis wrote:
>>> On Sun, 25 May 2025 at 15:33, Dmitry Baryshkov
>>> <dmitry.baryshkov@....qualcomm.com> wrote:
>>>>

[...]

>> Yes, please. Don't set okay status for the GPU until it gets enabled.
> 
> Drive-by: Shouldn't the dtb describe the hw and not the state of the
> linux kernel's support for the hw?  Ie. if bad things happen if we
> describe hw which is missing driver support, shouldn't we fix that in
> the driver.
> 
> (In the case of the GPU there is the slight wrinkle that we don't have
> a gpu-id yet so there is no compatible in the dtb yet.)

My two cents are that it's okay to enable it, at least in this case..

Konrad