linux-kernel - Re: [PATCH 0/3] Fix EEE support for MT7531 and MT7988 SoC switch

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Date: Tue, 19 Mar 2024 18:25:22 +0000
From: Daniel Golle <daniel@...rotopia.org>
To: arinc.unal@...nc9.com
Cc: DENG Qingfang <dqfext@...il.com>, Sean Wang <sean.wang@...iatek.com>,
	Andrew Lunn <andrew@...n.ch>,
	Florian Fainelli <f.fainelli@...il.com>,
	Vladimir Oltean <olteanv@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	René van Dorst <opensource@...rst.com>,
	Russell King <linux@...linux.org.uk>,
	SkyLake Huang <SkyLake.Huang@...iatek.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Bartel Eerdekens <bartel.eerdekens@...stell8.be>,
	mithat.guner@...ont.com, erkin.bozoglu@...ont.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH 0/3] Fix EEE support for MT7531 and MT7988 SoC switch

On Mon, Mar 18, 2024 at 10:46:22AM +0300, Arınç ÜNAL via B4 Relay wrote:
> Hi.
> 
> This patch series fixes EEE support for MT7531 and the switch on the MT7988
> SoC. EEE did not work on MT7531 on most boards before this, it is unclear
> what's the status on MT7988 SoC switch as I don't have the hardware.

EEE seems to already work just fine on the MT7988 built-in switch, at least
on the BPI-R4. I don't think the SoC has bootstrap pins related to EEE like
stand-alone MT753x may have.

root@...-r4:~# ethtool --show-eee lan1
EEE settings for lan1:
    EEE status: disabled
    Tx LPI: 30 (us)
    Supported EEE link modes:  100baseT/Full
                               1000baseT/Full
    Advertised EEE link modes:  Not reported
    Link partner advertised EEE link modes:  100baseT/Full
                                             1000baseT/Full

root@...-r4:~# ethtool --set-eee lan1 eee on
root@...-r4:~# ethtool --show-eee lan1
EEE settings for lan1:
    EEE status: enabled - inactive
    Tx LPI: 30 (us)
    Supported EEE link modes:  100baseT/Full
                               1000baseT/Full
    Advertised EEE link modes:  100baseT/Full
                                1000baseT/Full
    Link partner advertised EEE link modes:  Not reported
root@...-r4:~# ethtool --show-eee lan1
EEE settings for lan1:
    EEE status: enabled - active
    Tx LPI: 30 (us)
    Supported EEE link modes:  100baseT/Full
                               1000baseT/Full
    Advertised EEE link modes:  100baseT/Full
                                1000baseT/Full
    Link partner advertised EEE link modes:  100baseT/Full
                                             1000baseT/Full

So don't fix if it ain't broken maybe...?

> 
> Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>
> ---
> Arınç ÜNAL (3):
>       net: dsa: mt7530: fix enabling EEE on MT7531 switch on all boards
>       net: dsa: mt7530: fix disabling EEE on failure on MT7531 and MT7988
>       net: phy: mediatek-ge: do not disable EEE advertisement
> 
>  drivers/net/dsa/mt7530.c      | 7 +++++++
>  drivers/net/dsa/mt7530.h      | 7 ++++++-
>  drivers/net/phy/mediatek-ge.c | 3 ---
>  3 files changed, 13 insertions(+), 4 deletions(-)
> ---
> base-commit: ea80e3ed09ab2c2b75724faf5484721753e92c31
> change-id: 20240317-for-net-mt7530-fix-eee-for-mt7531-mt7988-a5c5453cc0e8
> 
> Best regards,
> -- 
> Arınç ÜNAL <arinc.unal@...nc9.com>
> 
>