[V2] net: fec: Get rid of FEC_ENET_ENABLE_[TR]XC_DELAY

The FEC_ENET_ENABLE_.XC_DELAY setting is only used by one system which
supports OF control, correctly set the rgmii-id PHY mode in the DT and
then determine whether or not to enable the FEC RXC/TXC internal delay
based on the PHY mode.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Ramon Fried <rfried.dev@gmail.com>
---
V2: Add missing ifdef DM_ETH around the code using fec->interface
---
 arch/arm/dts/fsl-imx8qm-apalis.dts  |  2 +-
 arch/arm/dts/fsl-imx8qxp-apalis.dts |  2 +-
 drivers/net/fec_mxc.c               | 14 +++++++-------
 include/configs/apalis-imx8.h       |  3 ---
 include/configs/apalis-imx8x.h      |  3 ---
 5 files changed, 9 insertions(+), 15 deletions(-)

Hi Marek,

Sorry for the late reply.

On Sun, Jan 24, 2021 at 4:51 PM Marek Vasut <marex@denx.de> wrote:
>
> The FEC_ENET_ENABLE_.XC_DELAY setting is only used by one system which
> supports OF control, correctly set the rgmii-id PHY mode in the DT and
> then determine whether or not to enable the FEC RXC/TXC internal delay
> based on the PHY mode.
>
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
> Cc: Stefano Babic <sbabic@denx.de>
> Cc: Ramon Fried <rfried.dev@gmail.com>
> ---
> V2: Add missing ifdef DM_ETH around the code using fec->interface
> ---
>  arch/arm/dts/fsl-imx8qm-apalis.dts  |  2 +-
>  arch/arm/dts/fsl-imx8qxp-apalis.dts |  2 +-
>  drivers/net/fec_mxc.c               | 14 +++++++-------
>  include/configs/apalis-imx8.h       |  3 ---
>  include/configs/apalis-imx8x.h      |  3 ---
>  5 files changed, 9 insertions(+), 15 deletions(-)
>
> diff --git a/arch/arm/dts/fsl-imx8qm-apalis.dts b/arch/arm/dts/fsl-imx8qm-apalis.dts
> index 5187b794527..0d8d3b3e8e8 100644
> --- a/arch/arm/dts/fsl-imx8qm-apalis.dts
> +++ b/arch/arm/dts/fsl-imx8qm-apalis.dts
> @@ -503,7 +503,7 @@
>         pinctrl-0 = <&pinctrl_fec1>;
>         fsl,magic-packet;
>         phy-handle = <&ethphy0>;
> -       phy-mode = "rgmii";
> +       phy-mode = "rgmii-id";

The PHY on Apalis iMX8QM expects the delay on TXC line only.
So "rgmii-txid" would be better there.

>         phy-reset-duration = <10>;
>         phy-reset-gpios = <&gpio1 11 1>;
>         status = "okay";
> diff --git a/arch/arm/dts/fsl-imx8qxp-apalis.dts b/arch/arm/dts/fsl-imx8qxp-apalis.dts
> index 6bd231b2834..9cb3d3a809b 100644
> --- a/arch/arm/dts/fsl-imx8qxp-apalis.dts
> +++ b/arch/arm/dts/fsl-imx8qxp-apalis.dts
> @@ -229,7 +229,7 @@
>         pinctrl-0 = <&pinctrl_fec1>;
>         fsl,magic-packet;
>         phy-handle = <&ethphy0>;
> -       phy-mode = "rgmii";
> +       phy-mode = "rgmii-id";
>         phy-reset-duration = <10>;
>         phy-reset-post-delay = <150>;
>         phy-reset-gpios = <&gpio3 4 GPIO_ACTIVE_LOW>;
> diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
> index bb55be9a267..4f02ba0ec5f 100644
> --- a/drivers/net/fec_mxc.c
> +++ b/drivers/net/fec_mxc.c
> @@ -507,14 +507,14 @@ static int fec_open(struct eth_device *edev)
>         writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_ETHER_EN,
>                &fec->eth->ecntrl);
>
> -#ifdef FEC_ENET_ENABLE_TXC_DELAY
> -       writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_TXC_DLY,
> -              &fec->eth->ecntrl);
> -#endif
> +#ifdef CONFIG_DM_ETH
> +       if (fec->interface == PHY_INTERFACE_MODE_RGMII_ID ||
> +           fec->interface == PHY_INTERFACE_MODE_RGMII_TXID)
> +               setbits_le32(&fec->eth->ecntrl, FEC_ECNTRL_TXC_DLY);
>
> -#ifdef FEC_ENET_ENABLE_RXC_DELAY
> -       writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_RXC_DLY,
> -              &fec->eth->ecntrl);
> +       if (fec->interface == PHY_INTERFACE_MODE_RGMII_ID ||
> +           fec->interface == PHY_INTERFACE_MODE_RGMII_RXID)
> +               setbits_le32(&fec->eth->ecntrl, FEC_ECNTRL_RXC_DLY);
>  #endif
>
>  #if defined(CONFIG_MX25) || defined(CONFIG_MX53) || defined(CONFIG_MX6SL)
> diff --git a/include/configs/apalis-imx8.h b/include/configs/apalis-imx8.h
> index db4e9011c0b..81441d7770f 100644
> --- a/include/configs/apalis-imx8.h
> +++ b/include/configs/apalis-imx8.h
> @@ -21,9 +21,6 @@
>  #define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
>
>  /* Networking */
> -#define FEC_QUIRK_ENET_MAC

This quirk can't be dropped so far.

> -#define FEC_ENET_ENABLE_TXC_DELAY
> -
>  #define CONFIG_TFTP_TSIZE
>
>  #define CONFIG_IPADDR                  192.168.10.2
> diff --git a/include/configs/apalis-imx8x.h b/include/configs/apalis-imx8x.h
> index db31c210f50..90bbeb926d3 100644
> --- a/include/configs/apalis-imx8x.h
> +++ b/include/configs/apalis-imx8x.h
> @@ -25,9 +25,6 @@
>  #define CONFIG_NETMASK                 255.255.255.0
>  #define CONFIG_SERVERIP                        192.168.10.1
>
> -#define FEC_ENET_ENABLE_TXC_DELAY
> -#define FEC_ENET_ENABLE_RXC_DELAY
> -
>  #define MEM_LAYOUT_ENV_SETTINGS \
>         "kernel_addr_r=0x80280000\0" \
>         "fdt_addr_r=0x83100000\0" \
> --
> 2.29.2
>

On 1/29/21 5:19 PM, Oleksandr Suvorov wrote:
> Hi Marek,

Hi,

[...]

>> +++ b/arch/arm/dts/fsl-imx8qm-apalis.dts
>> @@ -503,7 +503,7 @@
>>          pinctrl-0 = <&pinctrl_fec1>;
>>          fsl,magic-packet;
>>          phy-handle = <&ethphy0>;
>> -       phy-mode = "rgmii";
>> +       phy-mode = "rgmii-id";
> 
> The PHY on Apalis iMX8QM expects the delay on TXC line only.
> So "rgmii-txid" would be better there.

Can you prepare me a tested diff for the apalis boards so I can squash 
it into V3 ? That would be easiest.

[...]

>>   /* Networking */
>> -#define FEC_QUIRK_ENET_MAC
> 
> This quirk can't be dropped so far.

With the following patch applied, I believe it can:
[PATCH] ARM: imx: Add missing FEC ethernet quirk for MX8M

[...]