linux-kernel - Re: Re: Re: Re: Re: Re: [PATCH v3 2/2] ethernet: eswin: Add eic7700 ethernet driver

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Message-ID: <548973df-2fa8-4502-9f7c-668d0eeb16c6@lunn.ch>
Date: Fri, 22 Aug 2025 05:17:37 +0200
From: Andrew Lunn <andrew@...n.ch>
To: 李志 <lizhi2@...incomputing.com>
Cc: weishangjuan@...incomputing.com, andrew+netdev@...n.ch,
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Subject: Re: Re: Re: Re: Re: Re: [PATCH v3 2/2] ethernet: eswin: Add eic7700
 ethernet driver

> We re-tuned and verified that setting the TXD and RXD delays to 0 and
> configuring TXEN and RXDV to 0 yielded the same hardware performance as
> long as we only applied delays (e.g. 200ps) to TXCLK and RXCLK.

This is in addition to phy-mode = 'rgmii-id'?

> Therefore, in the next patch, we will drop the vendor-specific properties
> (e.g. eswin,dly-param-*) and keep only the standard attributes, namely
> rx-internal-delay-ps and tx-internal-delay-ps.
> Is this correct?

Yes, 200ps is a small tuning value, when the PHY adds the 2ns. This is
O.K.

	Andrew