linux-kernel - [PATCH 02/20] arm64: dts: qcom: sa8775p: mark MDP interconnects as ALWAYS on

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Message-Id: <20250415-drm-msm-dts-fixes-v1-2-90cd91bdd138@oss.qualcomm.com>
Date: Tue, 15 Apr 2025 13:26:00 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: cros-qcom-dts-watchers@...omium.org,
        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>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: [PATCH 02/20] arm64: dts: qcom: sa8775p: mark MDP interconnects as
 ALWAYS on

Change the tag for MDP interconnects to QCOM_ICC_TAG_ALWAYS, so that if
CPUSS collapses, the display may stay on.

Suggested-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/sa8775p.dtsi | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sa8775p.dtsi b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
index a904960359d731d2f0b6659a8ae99bff0e1bafb4..4da50c5ec612688a78b42543e23625b5a9801f2f 100644
--- a/arch/arm64/boot/dts/qcom/sa8775p.dtsi
+++ b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
@@ -3959,10 +3959,10 @@ mdss0: display-subsystem@...0000 {
 			reg-names = "mdss";
 
 			/* same path used twice */
-			interconnects = <&mmss_noc MASTER_MDP0 QCOM_ICC_TAG_ACTIVE_ONLY
-					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
-					<&mmss_noc MASTER_MDP1 QCOM_ICC_TAG_ACTIVE_ONLY
-					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ACTIVE_ONLY>,
+			interconnects = <&mmss_noc MASTER_MDP0 QCOM_ICC_TAG_ALWAYS
+					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>,
+					<&mmss_noc MASTER_MDP1 QCOM_ICC_TAG_ALWAYS
+					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>,
 					<&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ACTIVE_ONLY
 					 &config_noc SLAVE_DISPLAY_CFG QCOM_ICC_TAG_ACTIVE_ONLY>;
 			interconnect-names = "mdp0-mem",

-- 
2.39.5