linux-kernel - Re: [PATCH v4 3/4] arm64: dts: qcom: sm8550: add missing cpu-cfg interconnect path in the mdss node

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Message-ID: <pgwuzwohvnvrw7ism5zuaigjjsljvqylej2tyjxeo7cpcsycfk@lusbxdvvbetz>
Date: Thu, 13 Feb 2025 19:00:07 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Neil Armstrong <neil.armstrong@...aro.org>
Cc: Rob Clark <robdclark@...il.com>, 
	Abhinav Kumar <quic_abhinavk@...cinc.com>, Sean Paul <sean@...rly.run>, 
	Marijn Suijten <marijn.suijten@...ainline.org>, David Airlie <airlied@...il.com>, 
	Simona Vetter <simona@...ll.ch>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
	Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>, 
	Konrad Dybcio <konradybcio@...nel.org>, linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
	freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: Re: [PATCH v4 3/4] arm64: dts: qcom: sm8550: add missing cpu-cfg
 interconnect path in the mdss node

On Thu, Feb 13, 2025 at 05:27:58PM +0100, Neil Armstrong wrote:
> The bindings requires the mdp0-mem and the cpu-cfg interconnect path,
> add the missing cpu-cfg path to fix the dtbs check error.

I'd say that this is not just to 'fix dtbs check', but also to ensure
that MDSS has enough bandwidth to let HLOS write config registers.

> 
> Fixes: b8591df49cde ("arm64: dts: qcom: sm8550: correct MDSS interconnects")
> Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> ---
>  arch/arm64/boot/dts/qcom/sm8550.dtsi | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

-- 
With best wishes
Dmitry