Subject: Re: [PATCH v2 11/11] net: dsa: mt7530: use external PCS driver

From: "Russell King (Oracle)" <[email-masked]>
Date: Fri, 10 Feb 2023 10:56:57 +0000

On Tue, Feb 07, 2023 at 02:24:17PM +0000, Daniel Golle wrote:
> @@ -2728,11 +2612,11 @@ mt753x_phylink_mac_select_pcs(struct dsa_switch *ds, int port,
>  
>  	switch (interface) {
>  	case PHY_INTERFACE_MODE_TRGMII:
> +		return &priv->pcs[port].pcs;
>  	case PHY_INTERFACE_MODE_SGMII:
>  	case PHY_INTERFACE_MODE_1000BASEX:
>  	case PHY_INTERFACE_MODE_2500BASEX:
> -		return &priv->pcs[port].pcs;
> -
> +		return priv->ports[port].sgmii_pcs;

My only concern here is that we also use the PCS when in TRGMII mode in
this driver, but the mtk pcs code from mtk_eth_soc doesn't handle
TRGMII (and getting the link timer will fail for this mode, causing
the pcs_config() method to fail.)

Thus, this driver will stop working in TRGMII mode.

-- 
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