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33 lines
1.0 KiB
Diff
33 lines
1.0 KiB
Diff
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From c40b423b1cec0d54e84e75099b97c022455121ab Mon Sep 17 00:00:00 2001
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From: Jonathan Bell <jonathan@raspberrypi.com>
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Date: Wed, 15 May 2024 15:21:14 +0100
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Subject: [PATCH 1089/1135] DTS: bcm2712: set nonzero QoS values for PCIE1
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If PCIE1 is left with the default (zero) AXI QoS values, endpoints can
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receive extremely poor service for non-posted transactions e.g. reads.
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Such transactions can take milliseconds to complete on a contended
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system.
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Bump priorities for every TC above the non-realtime greedy peripherals
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in BCM2712, to allow reasonable service without competing against hard
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realtime peripherals.
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Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
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---
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arch/arm/boot/dts/broadcom/bcm2712-rpi-5-b.dts | 4 ++++
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1 file changed, 4 insertions(+)
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--- a/arch/arm/boot/dts/broadcom/bcm2712-rpi-5-b.dts
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+++ b/arch/arm/boot/dts/broadcom/bcm2712-rpi-5-b.dts
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@@ -170,6 +170,10 @@ rp1_target: &pcie2 {
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status = "okay";
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};
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+&pcie1 {
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+ brcm,vdm-qos-map = <0x33333333>;
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+};
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+
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// Add some labels to 2712 device
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// The system UART
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