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From: Russell King - ARM Linux admin <>
To: Ioana Ciornei <>
Cc: Ioana Ciocoi Radulescu <>,
	Andrew Lunn <>,
	Heiner Kallweit <>,
	"David S. Miller" <>,
	Jakub Kicinski <>,
	"" <>
Subject: Re: [PATCH net-next 3/3] net: dpaa2-mac: add backplane link mode support
Date: Thu, 4 Feb 2021 14:51:24 +0000	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <20210120221900.i6esmk6uadgqpdtu@skbuf>

On Wed, Jan 20, 2021 at 10:19:01PM +0000, Ioana Ciornei wrote:
> On Tue, Jan 19, 2021 at 03:36:09PM +0000, Russell King wrote:
> > Add support for backplane link mode, which is, according to discussions
> > with NXP earlier in the year, is a mode where the OS (Linux) is able to
> > manage the PCS and Serdes itself.
> Indeed, DPMACs in TYPE_BACKPLANE can have both their PCS and SerDes managed
> by Linux (since the firmware is not touching these).
> That being said, DPMACs in TYPE_PHY (the type that is already supported
> in dpaa2-mac) can also have their PCS managed by Linux (no interraction
> from the firmware's part with the PCS, just the SerDes).
> All in all, this patch is not needed for this particular usecase, where
> the switch between 1000Base-X and SGMII is done by just a minor
> reconfiguration in the PCS, without the need for SerDes changes.
> Also, with just the changes from this patch, a interface connected to a
> DPMAC in TYPE_BACKPLANE is not even creating a phylink instance. It's
> mainly because of this check from dpaa2-eth:
> 	if (dpaa2_eth_is_type_phy(priv)) {
> 		err = dpaa2_mac_connect(mac);
> I would suggest just dropping this patch.

Hi Ioana,

So what is happening with this series given our discussions off-list?

Do I resend it as-is?


RMK's Patch system:
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!

  parent reply	other threads:[~2021-02-04 14:54 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-19 15:35 [PATCH net-next 0/3] dpaa2: add 1000base-X support Russell King - ARM Linux admin
2021-01-19 15:35 ` [PATCH net-next 1/3] net: pcs: add pcs-lynx 1000BASE-X support Russell King
2021-01-20 22:03   ` Ioana Ciornei
2021-01-19 15:36 ` [PATCH net-next 2/3] net: dpaa2-mac: add " Russell King
2021-01-20 22:23   ` Ioana Ciornei
2021-01-19 15:36 ` [PATCH net-next 3/3] net: dpaa2-mac: add backplane link mode support Russell King
2021-01-20 22:19   ` Ioana Ciornei
2021-01-20 22:35     ` Russell King - ARM Linux admin
2021-02-04 14:51     ` Russell King - ARM Linux admin [this message]
2021-02-04 15:40       ` Ioana Ciornei

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