> -----邮件原件----- > 发件人: Marek Vasut <[email protected]> > 发送时间: 2026年6月8日 20:47 > 收件人: Alice Guo (OSS) <[email protected]>; [email protected] > 抄送: Jerome Forissier <[email protected]>; Tom Rini > <[email protected]>; Ye Li <[email protected]>; Alice Guo <[email protected]>; > Clark Wang <[email protected]> > 主题: Re: 回复: [PATCH v1 3/3] net: fsl_enetc: Add SGMII support for i.MX95 > > On 6/8/26 8:58 AM, Alice Guo (OSS) wrote: > > Hello Alice, > > >>> Add SGMII interface mode configuration for i.MX95 platform in ENETC > >>> driver. > >> Which PHY did you use for the tests here ? > >> > >> Have you also tested this with a 100/Full only (not 1000/Full) > >> capable switch -- does this work in 100/Full node or does this work only in > 1000/Full mode ? > > > > Hi Marek, > > > > I tested this using the Aquantia AQR113C PHY. The interface works correctly > > in > 1000/full mode, but it does not support 100/full mode. > Do you know why is the 100/Full operation not supported ? > > I also noticed the same in Linux, and also with DP83867. > > I would expect the SGMII to duplicate traffic on the SGMII bus 10x/100x in > 100/Full and 10/Full modes, is this not the case with MX95 and SGMII 1G ? > > Thank you for your help !
This is a hardware limitation of the i.MX95 NETC implementation. The SGMII protocol is controlled by the internal XPCS, which does not support 100 Mbps or 10 Mbps operation through symbol replication (10x/100x duplication) on the SGMII bus. Best regards, Alice Guo
