arm64: dts: rockchip: fix rk3328-roc-cc gmac2io tx/rx_delay
authorLeonidas P. Papadakos <papadakospan@gmail.com>
Thu, 28 Feb 2019 22:29:23 +0000 (00:29 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 8 May 2019 05:21:45 +0000 (07:21 +0200)
[ Upstream commit 924726888f660b2a86382a5dd051ec9ca1b18190 ]

The rk3328-roc-cc board exhibits tx stability issues with large packets,
as does the rock64 board, which was fixed with this patch
https://patchwork.kernel.org/patch/10178969/

A similar patch was merged for the rk3328-roc-cc here
https://patchwork.kernel.org/patch/10804863/
but it doesn't include the tx/rx_delay tweaks, and I find that they
help with an issue where large transfers would bring the ethernet
link down, causing a link reset regularly.

Signed-off-by: Leonidas P. Papadakos <papadakospan@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts

index 246c317..91061d9 100644 (file)
@@ -94,8 +94,8 @@
        snps,reset-gpio = <&gpio1 RK_PC2 GPIO_ACTIVE_LOW>;
        snps,reset-active-low;
        snps,reset-delays-us = <0 10000 50000>;
-       tx_delay = <0x25>;
-       rx_delay = <0x11>;
+       tx_delay = <0x24>;
+       rx_delay = <0x18>;
        status = "okay";
 };