[PATCH v2 09/12] arm64: dts: qcom: sc8280xp-crd: disable ASPM L0s for modem and Wi-Fi

Johan Hovold
2024-02-23T15:23:08Z

There are indications that ASPM L0s is not working very well on this
machine so disable it also for the modem and Wi-Fi controllers for now.

This specifically avoids having the modem and Wi-Fi controllers bounce
in an out of L0s when not used (the modem still bounces in and out of
L1) as well as intermittent Correctable errors on the Wi-Fi link when
not used.

Fixes: 9f4f3dfad8cf ("PCI: qcom: Enable ASPM for platforms supporting 1.9.0 ops")
Cc: stable@vger.kernel.org # 6.7
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
arch/arm64/boot/dts/qcom/sc8280xp-crd.dts | 3 +++
1 file changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
index 7e94a68d5d9f..8fc0380f65a0 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
+++ b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
@@ -546,6 +546,8 @@ &pcie2a_phy {
};

&pcie3a {
+ aspm-no-l0s;
+
perst-gpios = <&tlmm 151 GPIO_ACTIVE_LOW>;
wake-gpios = <&tlmm 148 GPIO_ACTIVE_LOW>;

@@ -566,6 +568,7 @@ &pcie3a_phy {

&pcie4 {
max-link-speed = <2>;
+ aspm-no-l0s;

perst-gpios = <&tlmm 141 GPIO_ACTIVE_LOW>;
wake-gpios = <&tlmm 139 GPIO_ACTIVE_LOW>;
--
2.43.0