Re: [PATCH] arm64: dts: rockchip: Add txpbl node for RK3399/RK3328

[Heiko Stuebner]

Am Dienstag, 18. Februar 2020, 23:10:37 CET schrieb Carlos de Paula:
> Some rockchip SoCs like the RK3399 and RK3328 exhibit an issue
> where tx checksumming does not work with packets larger than 1498.
> 
> The default Programmable Buffer Length for TX in these GMAC's is
> not suitable for MTUs higher than 1498. The workaround is to disable
> TX offloading with 'ethtool -K eth0 tx off rx off' causing performance
> impacts as it disables hardware checksumming.
> 
> This patch sets snps,txpbl to 0x4 which is a safe number tested ok for
> the most popular MTU value of 1500.
> 
> For reference, see https://lkml.org/lkml/2019/4/1/1382.
> 
> Signed-off-by: Carlos de Paula <me@xxxxxxxxxxxxx>

applied for 5.7

Thanks
Heiko