[PATCH net-next v2 5/7] net: dsa: mt7530: simplify mt7530_setup_port6() and change to void

[Vladimir Oltean]

On Tue, Jan 30, 2024 at 08:46:04PM +0300, Arınç ÜNAL wrote:
> would supposedly achieve 2 Gbps TX & 2 Gbps RX

Source? Commit 8efaa653a8a5 ("net: ethernet: mediatek: Add MT7621 TRGMII
mode support") says "TRGMII speed is 1200MBit.".

> Unless the MediaTek SoC ethernet driver somehow caps TRGMII to 1 Gbps,
> I consider this whole TRGMII shenanigans a scam

I laughed :)

You have to see whether the CPU isn't in fact at 100% already, becoming
a bottleneck before the interface speed does.

Also, mtk_eth_soc.c has an interesting comment "TRGMII is not permitted
on MT7621 if using DDR2" - not sure if applicable to your setup or not.

I just got myself an ASUS RT-AX1800U (uses the mt7621_asus_rt-ax53u.dts
device tree AFAICT) which I'll be setting up with OpenWrt in the weeks
to come, and on which I might also be able to run some tests from time
to time.