openwrt/target/linux/bcm27xx/patches-6.6/950-1089-DTS-bcm2712-set-nonzero-QoS-values-for-PCIE1.patch
Álvaro Fernández Rojas 8c405cdccc bcm27xx: add 6.6 kernel patches
The patches were generated from the RPi repo with the following command:
git format-patch v6.6.34..rpi-6.1.y

Some patches needed rebasing and, as usual, the applied and reverted, wireless
drivers, Github workflows, READMEs and defconfigs patches were removed.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2024-06-18 18:52:49 +02:00

33 lines
1.0 KiB
Diff

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