linux-kernel - Re: [PATCH v3 10/10] arm64: dts: qcom: sar2130p: add display nodes

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Message-ID: <96e38ebb-5847-485a-8bf6-50e7b10ce572@oss.qualcomm.com>
Date: Tue, 15 Apr 2025 11:44:19 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <lumag@...nel.org>, 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>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        Krishna Manikandan <quic_mkrishn@...cinc.com>,
        Jonathan Marek <jonathan@...ek.ca>,
        Bjorn Andersson <andersson@...nel.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>, Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, iommu@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 10/10] arm64: dts: qcom: sar2130p: add display nodes

On 4/15/25 11:39 AM, Dmitry Baryshkov wrote:
> From: Dmitry Baryshkov <lumag@...nel.org>
> 
> Add display controller, two DSI hosts, two DSI PHYs and a single DP
> controller. Link DP to the QMP Combo PHY.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> ---

[...]

> +			interconnects = <&mmss_noc MASTER_MDP QCOM_ICC_TAG_ACTIVE_ONLY
> +					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
> +					<&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
> +					 &config_noc SLAVE_DISPLAY_CFG QCOM_ICC_TAG_ACTIVE_ONLY>;
> +			interconnect-names = "mdp0-mem", "cpu-cfg";

The first path should be always on, so that if CPUSS collapses,
the display may stay on

other than that

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Konrad