From: "Christian Betz" <christian.betz@gmail.com>
To: meta-freescale@lists.yoctoproject.org
Subject: fec driver works on linux-imx, not linux-fslc+use-mainline-bsp (imx6dl)
Date: Mon, 17 Aug 2020 08:32:04 -0400 [thread overview]
Message-ID: <CAC9ffDF-Bf9Y6+NcgWGhFbO2+ZBdX=MBvfO1Va0yrkawOLNUzg@mail.gmail.com> (raw)
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Hi,
I'm porting a custom MX6DL board from linux-imx to linux-fslc (along with
use-mainline-bsp in FEATURES). The primary reason for this choice was for
etnaviv support and a general preference for a mainline kernel. I'm pleased
to say that the etnaviv is working ok!
Problem: The ethernet connection does not work correctly. It seems to
accept pings and I can login via SSH. However, any scp or http transfer
fails. Ifconfig shows TX errors. None of these issues happen on linux-imx.
btw, i have an imx6qsabresd demo board running linux-fslc with
use-mainline-bsp and the ethernet works fine on it.
There are no errors/warnings in dmesg. If I use "ping -s 1500 $DEVICE_IP",
I definitely notice pings being lost, so this seems related to packet size
somehow.
I'm looking for some suggestions on next steps to troubleshoot this issue,
or some idea of what is different between linux-imx and linux-fslc when it
comes to the fec driver. Note: i'm running kernel 5.4.46 based on revision
38d6c352 (Otavio's merge on June 15th).
As far as can tell, our ethernet-related customizations are minimal,
basically these changes to 'pinctrl_enet' imx6qdl-sabresd.dtsi. Again,
these changes seem to work fine on linux-imx but not linux-fslc with
use-mainline-bsp.
pinctrl_enet: enetgrp {
fsl,pins = <
MX6QDL_PAD_ENET_MDIO__ENET_MDIO
0x1b0b0
MX6QDL_PAD_ENET_MDC__ENET_MDC
0x1b0b0
MX6QDL_PAD_RGMII_TXC__RGMII_TXC
0x1b030
MX6QDL_PAD_RGMII_TD0__RGMII_TD0
0x1b030
MX6QDL_PAD_RGMII_TD1__RGMII_TD1
0x1b030
MX6QDL_PAD_RGMII_TD2__RGMII_TD2
0x1b030
MX6QDL_PAD_RGMII_TD3__RGMII_TD3
0x1b030
MX6QDL_PAD_RGMII_TX_CTL__RGMII_TX_CTL
0x1b030
- MX6QDL_PAD_ENET_REF_CLK__ENET_TX_CLK
0x1b0b0
+ /* MX6QDL_PAD_ENET_REF_CLK__ENET_TX_CLK
0x1b0b0
+ * Changes to CONFIG_BITS
+ * Turn off PAD_CTL_HYS, PAT_CTL_PUS_22KUP
+ * Turn on SRE_FAST
+ */
+ MX6QDL_PAD_ENET_REF_CLK__ENET_TX_CLK
0x100b1
MX6QDL_PAD_RGMII_RXC__RGMII_RXC
0x1b030
MX6QDL_PAD_RGMII_RD0__RGMII_RD0
0x1b030
MX6QDL_PAD_RGMII_RD1__RGMII_RD1
0x1b030
MX6QDL_PAD_RGMII_RD2__RGMII_RD2
0x1b030
MX6QDL_PAD_RGMII_RD3__RGMII_RD3
0x1b030
MX6QDL_PAD_RGMII_RX_CTL__RGMII_RX_CTL
0x1b030
- MX6QDL_PAD_GPIO_16__ENET_REF_CLK
0x4001b0a8
+ /* Completely disable ENET_REF_CLK (???) */
+ /*MX6QDL_PAD_GPIO_16__ENET_REF_CLK
0x4001b0a8*/
>;
};
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next reply other threads:[~2020-08-17 12:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-17 12:32 Christian Betz [this message]
2020-08-17 13:04 ` [meta-freescale] fec driver works on linux-imx, not linux-fslc+use-mainline-bsp (imx6dl) Fabio Estevam
2020-08-17 13:04 ` Andrey Zhizhikin
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