linux-kernel - [PATCH AUTOSEL 6.8 16/68] arm64: dts: qcom: qrb2210-rb1: disable cluster power domains

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Date: Fri, 29 Mar 2024 08:25:12 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	konrad.dybcio@...aro.org,
	robh@...nel.org,
	krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org,
	linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: [PATCH AUTOSEL 6.8 16/68] arm64: dts: qcom: qrb2210-rb1: disable cluster power domains

From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

[ Upstream commit 7f492d48f08207e4ee23edc926b11de9f720aa61 ]

If cluster domain idle state is enabled on the RB1, the board becomes
significantly less responsive. Under certain circumstances (if some of
the devices are disabled in kernel config) the board can even lock up.

It seems this is caused by the MPM not updating wakeup timer during CPU
idle (in the same way the RPMh updates it when cluster idle state is
entered).

Disable cluster domain idle for the RB1 board until MPM driver is fixed
to cooperate with the CPU idle states.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Link: https://lore.kernel.org/r/20240130-rb1-suspend-cluster-v2-1-5bc1109b0869@linaro.org
Signed-off-by: Bjorn Andersson <andersson@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm64/boot/dts/qcom/qrb2210-rb1.dts | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts b/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts
index aa53b6af6d9cb..9a0308ef8b0f8 100644
--- a/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts
+++ b/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts
@@ -177,6 +177,24 @@ vph_pwr: regulator-vph-pwr {
 	};
 };
 
+&CPU_PD0 {
+	/delete-property/ power-domains;
+};
+
+&CPU_PD1 {
+	/delete-property/ power-domains;
+};
+
+&CPU_PD2 {
+	/delete-property/ power-domains;
+};
+
+&CPU_PD3 {
+	/delete-property/ power-domains;
+};
+
+/delete-node/ &CLUSTER_PD;
+
 &gpi_dma0 {
 	status = "okay";
 };
-- 
2.43.0