This is a note to let you know that I've just added the patch titled
arm64: dts: qcom: sc8280xp-x13s: limit pcie4 link speed
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm64-dts-qcom-sc8280xp-x13s-limit-pcie4-link-speed.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7a1c6a8bf47b0b290c79b9cc3ba6ee68be5522e8 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan+linaro@xxxxxxxxxx>
Date: Fri, 23 Feb 2024 16:21:19 +0100
Subject: arm64: dts: qcom: sc8280xp-x13s: limit pcie4 link speed
From: Johan Hovold <johan+linaro@xxxxxxxxxx>
commit 7a1c6a8bf47b0b290c79b9cc3ba6ee68be5522e8 upstream.
Limit the WiFi PCIe link speed to Gen2 speed (500 MB/s), which is the
speed that the boot firmware has brought up the link at (and that
Windows uses).
This is specifically needed to avoid a large amount of link errors when
restarting the link during boot (but which are currently not reported).
This also appears to fix intermittent failures to download the ath11k
firmware during boot which can be seen when there is a longer delay
between restarting the link and loading the WiFi driver (e.g. when using
full disk encryption).
Fixes: 123b30a75623 ("arm64: dts: qcom: sc8280xp-x13s: enable WiFi controller")
Cc: stable@xxxxxxxxxxxxxxx # 6.2
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240223152124.20042-8-johan+linaro@xxxxxxxxxx
Signed-off-by: Bjorn Andersson <andersson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts | 2 ++
1 file changed, 2 insertions(+)
--- a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
+++ b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
@@ -721,6 +721,8 @@
};
&pcie4 {
+ max-link-speed = <2>;
+
perst-gpios = <&tlmm 141 GPIO_ACTIVE_LOW>;
wake-gpios = <&tlmm 139 GPIO_ACTIVE_LOW>;
Patches currently in stable-queue which might be from johan+linaro@xxxxxxxxxx are
queue-6.6/revert-tty-serial-simplify-qcom_geni_serial_send_chunk_fifo.patch
queue-6.6/arm64-dts-qcom-sc8280xp-x13s-limit-pcie4-link-speed.patch
queue-6.6/pm-sleep-wakeirq-fix-wake-irq-warning-in-system-susp.patch
