[PATCH] arm64: dts: rockchip: fix rk3328-roc-cc gmac2io tx/rx_delay

* [PATCH] arm64: dts: rockchip: fix rk3328-roc-cc gmac2io tx/rx_delay
@ 2019-02-28 22:29 Leonidas P. Papadakos
       [not found] ` <20190228222923.30418-1-papadakospan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
  0 siblings, 1 reply; 4+ messages in thread
From: Leonidas P. Papadakos @ 2019-02-28 22:29 UTC (permalink / raw
  To: Levin Du
  Cc: linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Heiko Stuebner,
	Leonidas P. Papadakos

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-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts b/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts
index 33c44e857..0e34354b2 100644
--- a/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts
@@ -108,8 +108,8 @@
 	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";
 };
 
-- 
2.21.0

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