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Date:   Tue, 26 Nov 2019 15:54:50 +0100
From:   Oliver Graute <oliver.graute@gmail.com>
To:     Peng Fan <peng.fan@nxp.com>
Cc:     "catalin.marinas@arm.com" <catalin.marinas@arm.com>,
        "will@kernel.org" <will@kernel.org>,
        Anson Huang <anson.huang@nxp.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "mripard@kernel.org" <mripard@kernel.org>,
        "bjorn.andersson@linaro.org" <bjorn.andersson@linaro.org>,
        "dinguyen@kernel.org" <dinguyen@kernel.org>,
        dl-linux-imx <linux-imx@nxp.com>,
        "olof@lixom.net" <olof@lixom.net>,
        Leonard Crestez <leonard.crestez@nxp.com>,
        "shawnguo@kernel.org" <shawnguo@kernel.org>,
        "linux-arm-kernel@lists.infradead.org" 
        <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH] arm64: defconfig: Change CONFIG_AT803X_PHY from m to y
Message-ID: <20191126145450.GB5108@optiplex>
References: <1572848275-30941-1-git-send-email-peng.fan@nxp.com>
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On 04/11/19, Peng Fan wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> With phy-reset-gpios are enabled for i.MX8MM-EVK board, phy
> will be reset. Without CONFIG_AT803X_PHY as y, board will stop
> booting in NFS DHCP, because phy is not ready. So mark
> CONFIG_AT803X_PHY from m to y to make board boot when using nfs rootfs.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  arch/arm64/configs/defconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> index c9a867ac32d4..cd778c9ea8a4 100644
> --- a/arch/arm64/configs/defconfig
> +++ b/arch/arm64/configs/defconfig
> @@ -285,7 +285,7 @@ CONFIG_SNI_AVE=y
>  CONFIG_SNI_NETSEC=y
>  CONFIG_STMMAC_ETH=m
>  CONFIG_MDIO_BUS_MUX_MMIOREG=y
> -CONFIG_AT803X_PHY=m
> +CONFIG_AT803X_PHY=y
>  CONFIG_MARVELL_PHY=m
>  CONFIG_MARVELL_10G_PHY=m
>  CONFIG_MESON_GXL_PHY=m
> -- 
> 2.16.4

Hello Peng,

this patch broke my imx8qm nfs setup. With the generic phy driver my
board is booting fine. But with the AT803X_PHY=y enabled  I'am running
into the following phy issue. So on my side it looks inverse as on
yours. What is the best proposal to fix this?

[    5.550442] fec 5b040000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
[    5.573206] Sending DHCP requests ...... timed out!
[   95.339702] IP-Config: Retrying forever (NFS root)...
[   95.348873] Atheros 8035 ethernet 5b040000.ethernet-1:06: attached PHY driver [Atheros 8035 ethernet] (mii_bus:phy_addr=5b040000.ethernet-1:06, irq=POLL)
[   99.438443] fec 5b040000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
[   99.461206] Sending DHCP requests ...... timed out!
[  174.419639] IP-Config: Retrying forever (NFS root)...
[  174.428834] Atheros 8035 ethernet 5b040000.ethernet-1:06: attached PHY driver [Atheros 8035 ethernet] (mii_bus:phy_addr=5b040000.ethernet-1:06, irq=POLL)
[  178.542418] fec 5b040000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
[  178.565206] Sending DHCP requests .....
[  209.261271] random: crng init done
[  230.565202] . timed out!
[  260.577340] IP-Config: Retrying forever (NFS root)...
[  260.586497] Atheros 8035 ethernet 5b040000.ethernet-1:06: attached PHY driver [Atheros 8035 ethernet] (mii_bus:phy_addr=5b040000.ethernet-1:06, irq=POLL)
[  264.686438] fec 5b040000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
[  264.709206] Sending DHCP requests ...... timed out!
[  339.259701] IP-Config: Retrying forever (NFS root)...
[  339.268835] Atheros 8035 ethernet 5b040000.ethernet-1:06: attached PHY driver [Atheros 8035 ethernet] (mii_bus:phy_addr=5b040000.ethernet-1:06, irq=POLL)
[  343.374422] fec 5b040000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
[  343.405206] Sending DHCP requests ...... timed out!
[  433.171676] IP-Config: Retrying forever (NFS root)...
[  433.180842] Atheros 8035 ethernet 5b040000.ethernet-1:06: attached PHY driver [Atheros 8035 ethernet] (mii_bus:phy_addr=5b040000.ethernet-1:06, irq=POLL)
[  437.294439] fec 5b040000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
[  437.317206] Sending DHCP requests ...... timed out!
[  509.003660] IP-Config: Retrying forever (NFS root)...
[  509.012836] Atheros 8035 ethernet 5b040000.ethernet-1:06: attached PHY driver [Atheros 8035 ethernet] (mii_bus:phy_addr=5b040000.ethernet-1:06, irq=POLL)
[  513.102416] fec 5b040000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off

Best Regards,

Oliver