Re: [PATCH 0/3] arm64: dts/net: stmmac: Add Agilex5 SoCDK TSN Config2 board support

[Maxime Chevallier <maxime.chevallier@bootlin.com>]

Hi,

On 6/30/26 15:31, muhammad.nazim.amirul.nazle.asmade@altera.com wrote:
> From: Nazim Amirul <muhammad.nazim.amirul.nazle.asmade@altera.com>
> 
> The Intel SoCFPGA Agilex5 SoCDK TSN Config2 board uses a dual-port
> Ethernet setup where gmac1 (TSN port) operates with different MAC-side
> and PHY-side interface modes: GMII internally in the MAC, and RGMII
> towards the PHY.

There's the same behaviour on Gen5, e.g. CycloneV where we have the
"EMAC splitter". Based on wether or not we have that splitter in DT,
we override the INTF_SEL bits to set GMII as the MAC output, the splitter
converting that to RGMII/SGMII.

Is there something similar on this AgileX5 version by any chance, for
which we could reuse the logic ?

I know that on CycloneV you also need to adjust that GMII -> RGMII/SGMII
splitter whenever the speed changes, is that different on agileX5 ? have
you tested 10/100Mbps ?

Thanks,

Maxime