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ARM: dts: rockchip: rv1126: disable usb2 lpm for xhci

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The xHCI specification 1.1 does not require xHCI-compliant
controllers to always enable hardware USB2 LPM. However,
the current xHCI driver always enable it when seeing HLC=1.

On rv1106 platforms, the xHCI USB2 LPM is enabled by default.
And we found that a lot of USB Disks have USB2 HW LPM broken
issue when connected to rv1106 USB2 OTG interface.

Here are a part of special USB Disks with USB2 HW LPM broken:

1. idVendor=325d, idProduct=6410, Manufacturer: aigo
2. idVendor=21c4, idProduct=0cd1, Manufacturer: Lexar
3. idVendor=0951, idProduct=1666, Manufacturer: Kingston

When use dd command to write to these USB Disks, it may fail
with the following log:

[ 2844.700148] usb 7-1: reset high-speed USB device number 4 using xhci-hcd
[ 2889.072272] usb 7-1: reset high-speed USB device number 4 using xhci-hcd
[ 2921.498045] usb 7-1: reset high-speed USB device number 4 using xhci-hcd
......
[ 2953.923773] usb 7-1: reset high-speed USB device number 4 using xhci-hcd

Theoretically, we can add USB_QUIRK_NO_LPM individually for
these special USB Disks, however, it's difficult to cover all
USB Disks. So it's better to disable the USB2 LPM for xHCI
on rv1126 platforms.

Change-Id: Ideafe2ecf91fe3013825a064631509eecdad0254
Signed-off-by: William Wu <william.wu@rock-chips.com>
This commit is contained in:
William Wu
2022-12-23 14:26:56 +08:00
committed by Tao Huang
parent 1b33d33635
commit 6cbb4c5088
1 changed files with 1 additions and 0 deletions
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arch/arm/boot/dts/rv1126.dtsi
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@@ -2548,6 +2548,7 @@
snps,tx-ipgap-linecheck-dis-quirk;
snps,tx-fifo-resize;
snps,xhci-trb-ent-quirk;
snps,usb2-lpm-disable;
status = "disabled";
};
};