The SMMU architecture requires wired interrupts to be edge triggered,
which does not align with the DT description for the RK3588. This leads
to interrupt storms, as the SMMU continues to hold the pin high and only
pulls it down for a short amount when issuing an IRQ. Update the DT
description to be in line with the spec and perceived reality.
Signed-off-by: Patrick Wildt <patrick@xxxxxxxxx>
---
arch/arm64/boot/dts/rockchip/rk3588-base.dtsi | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi
index 8cfa30837ce7..520d0814a4de 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi
@@ -549,10 +549,10 @@ usb_host2_xhci: usb@fcd00000 {
mmu600_pcie: iommu@fc900000 {
compatible = "arm,smmu-v3";
reg = <0x0 0xfc900000 0x0 0x200000>;
- interrupts = <GIC_SPI 369 IRQ_TYPE_LEVEL_HIGH 0>,
- <GIC_SPI 371 IRQ_TYPE_LEVEL_HIGH 0>,
- <GIC_SPI 374 IRQ_TYPE_LEVEL_HIGH 0>,
- <GIC_SPI 367 IRQ_TYPE_LEVEL_HIGH 0>;
+ interrupts = <GIC_SPI 369 IRQ_TYPE_EDGE_RISING 0>,
+ <GIC_SPI 371 IRQ_TYPE_EDGE_RISING 0>,
+ <GIC_SPI 374 IRQ_TYPE_EDGE_RISING 0>,
+ <GIC_SPI 367 IRQ_TYPE_EDGE_RISING 0>;
interrupt-names = "eventq", "gerror", "priq", "cmdq-sync";
#iommu-cells = <1>;
};
@@ -560,10 +560,10 @@ mmu600_pcie: iommu@fc900000 {
mmu600_php: iommu@fcb00000 {
compatible = "arm,smmu-v3";
reg = <0x0 0xfcb00000 0x0 0x200000>;
- interrupts = <GIC_SPI 381 IRQ_TYPE_LEVEL_HIGH 0>,
- <GIC_SPI 383 IRQ_TYPE_LEVEL_HIGH 0>,
- <GIC_SPI 386 IRQ_TYPE_LEVEL_HIGH 0>,
- <GIC_SPI 379 IRQ_TYPE_LEVEL_HIGH 0>;
+ interrupts = <GIC_SPI 381 IRQ_TYPE_EDGE_RISING 0>,
+ <GIC_SPI 383 IRQ_TYPE_EDGE_RISING 0>,
+ <GIC_SPI 386 IRQ_TYPE_EDGE_RISING 0>,
+ <GIC_SPI 379 IRQ_TYPE_EDGE_RISING 0>;
interrupt-names = "eventq", "gerror", "priq", "cmdq-sync";
#iommu-cells = <1>;
status = "disabled";
--
2.48.1
