linux-kernel - [PATCH] arm64: dts: rockchip: Add missing power-domains for rk356x vop

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Message-Id: <20240702-rk356x-fix-vop-mmu-v1-1-a66d1a0c45ea@collabora.com>
Date: Tue, 02 Jul 2024 04:12:52 +0300
From: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>, 
 Sascha Hauer <s.hauer@...gutronix.de>
Cc: kernel@...labora.com, devicetree@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, 
 linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: rockchip: Add missing power-domains for rk356x
 vop_mmu

The iommu@...43e00 on RK356x SoC shares the VOP power domain, but the
power-domains property was not provided when the node has been added.

The consequence is that an attempt to reload the rockchipdrm module will
freeze the entire system.  That is because on probe time,
pm_runtime_get_suppliers() gets called for vop@...40000, which blocks
when pm_runtime_get_sync() is being invoked for iommu@...43e00.

Fix the issue by adding the missing property.

Fixes: 9d6c6d978f97 ("arm64: dts: rockchip: rk356x: Add VOP2 nodes")
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
---
 arch/arm64/boot/dts/rockchip/rk356x.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk356x.dtsi b/arch/arm64/boot/dts/rockchip/rk356x.dtsi
index d8543b5557ee..3e2a8bfcafea 100644
--- a/arch/arm64/boot/dts/rockchip/rk356x.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk356x.dtsi
@@ -790,6 +790,7 @@ vop_mmu: iommu@...43e00 {
 		clocks = <&cru ACLK_VOP>, <&cru HCLK_VOP>;
 		clock-names = "aclk", "iface";
 		#iommu-cells = <0>;
+		power-domains = <&power RK3568_PD_VO>;
 		status = "disabled";
 	};
 

---
base-commit: 1eb586a9782cde8e5091b9de74603e0a8386b09e
change-id: 20240702-rk356x-fix-vop-mmu-a235d68a734a