linux-kernel - [PATCH 3/3] arm64: dts: qcom: sm6350: Add MDSS

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Message-Id: <20250919-sm6350-mdss-reset-v1-3-48dcac917c73@fairphone.com>
Date: Fri, 19 Sep 2025 11:57:25 +0200
From: Luca Weiss <luca.weiss@...rphone.com>
To: Bjorn Andersson <andersson@...nel.org>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Konrad Dybcio <konradybcio@...nel.org>
Cc: ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Luca Weiss <luca.weiss@...rphone.com>
Subject: [PATCH 3/3] arm64: dts: qcom: sm6350: Add MDSS_CORE reset to mdss

Like on other platforms, if the OS does not support recovering the state
left by the bootloader it needs access to MDSS_CORE, so that it can
clear the MDSS configuration. Add a reference to the relevant reset.

This also fixes display init on Linux v6.17.

Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
---
 arch/arm64/boot/dts/qcom/sm6350.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm6350.dtsi b/arch/arm64/boot/dts/qcom/sm6350.dtsi
index ff1eb2c53e7b865350d00ffbfa82d7d1e3cc5aa0..929c8a8b2d446505228531bfc55f3350ef2980b7 100644
--- a/arch/arm64/boot/dts/qcom/sm6350.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm6350.dtsi
@@ -2150,6 +2150,8 @@ &clk_virt SLAVE_EBI_CH0 QCOM_ICC_TAG_ALWAYS>,
 			power-domains = <&dispcc MDSS_GDSC>;
 			iommus = <&apps_smmu 0x800 0x2>;
 
+			resets = <&dispcc DISP_CC_MDSS_CORE_BCR>;
+
 			#address-cells = <2>;
 			#size-cells = <2>;
 			ranges;

-- 
2.51.0