[PATCH 5.13 311/351] Revert "ARM: dts: bcm283x: increase dwc2s RX FIFO size"

Greg Kroah-Hartman
2021-07-19T17:48:15Z

From: Stefan Wahren <stefan.wahren@i2se.com>

[ Upstream commit 77daceabedb42482bb6200fa26047c5591716e45 ]

This reverts commit 278407a53c3b33fb820332c4d39eb39316c3879a.

The original change breaks USB config on Raspberry Pi Zero and Pi 4 B,
because it exceeds the total fifo size of 4080. A naive attempt to reduce
g-tx-fifo-size doesn't help on Raspberry Pi Zero. So better go back.

Fixes: 278407a53c3b ("ARM: dts: bcm283x: increase dwc2's RX FIFO size")
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Pavel Hofman <pavel.hofman@ivitera.com>
Link: https://lore.kernel.org/r/1622293371-5997-1-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Nicolas Saenz Julienne <nsaenz@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm/boot/dts/bcm283x-rpi-usb-otg.dtsi | 2 +-
arch/arm/boot/dts/bcm283x-rpi-usb-peripheral.dtsi | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/bcm283x-rpi-usb-otg.dtsi b/arch/arm/boot/dts/bcm283x-rpi-usb-otg.dtsi
index 20322de2f8bf..e2fd9610e125 100644
--- a/arch/arm/boot/dts/bcm283x-rpi-usb-otg.dtsi
+++ b/arch/arm/boot/dts/bcm283x-rpi-usb-otg.dtsi
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
&usb {
dr_mode = "otg";
- g-rx-fifo-size = <558>;
+ g-rx-fifo-size = <256>;
g-np-tx-fifo-size = <32>;
/*
* According to dwc2 the sum of all device EP
diff --git a/arch/arm/boot/dts/bcm283x-rpi-usb-peripheral.dtsi b/arch/arm/boot/dts/bcm283x-rpi-usb-peripheral.dtsi
index 1409d1b559c1..0ff0e9e25327 100644
--- a/arch/arm/boot/dts/bcm283x-rpi-usb-peripheral.dtsi
+++ b/arch/arm/boot/dts/bcm283x-rpi-usb-peripheral.dtsi
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
&usb {
dr_mode = "peripheral";
- g-rx-fifo-size = <558>;
+ g-rx-fifo-size = <256>;
g-np-tx-fifo-size = <32>;
g-tx-fifo-size = <256 256 512 512 512 768 768>;
};
--
2.30.2