I.MX8mmini -Ethernet IC DP83848 is not getting detected

[santhosh2]

Hi,

We are working on I.MX8mmini Ethernet IC DP83848 and ethernet is not getting detected

We have enabled the TI DP83848 Driver  as below

Menuconfig location

Symbol: DP83848_PHY [=y] 
Type  : tristate 
Prompt: Driver for Texas Instruments DP83848 PHY   
Location:     -> Device Drivers       
                  -> Network device support (NETDEVICES [=y])
                  -> PHY Device support and infrastructure (PHYLIB [=y])   
Defined at drivers/net/phy/Kconfig:144   
Depends on: NETDEVICES [=y] && PHYLIB [=y] 

Log, driver source code  and Schematic of Ethernet Section is attached for your reference

We had used the i.mx8mmini EVK configuration and now enabled the above drive, 
but we are not see the driver getting loaded in the trace. We are trying to configure 
the Ethernet Phy for MII mode dDo let me know how to setup the MII mode and how to 
enable and test the Ethernet driver

Regards  
Santhosh
 

[santhosh2]

Hi Igore,

I have now modified  from  phy-mode ="rgmii-id"; to phy-mode = "mii";the below section in the file fsl-imx8mm-evk.dts.orig and the same is attached for your reference

------------------------------------------------------------------------------------------------

&fec1 {
    pinctrl-names = "default";
    pinctrl-0 = <&pinctrl_fec1>;
    phy-mode = "mii";/*"rgmii-id";*/  //Commented by santhosh
    phy-handle = <&ethphy0>;
    fsl,magic-packet;
    status = "okay";

    mdio {
        #address-cells = <1>;
        #size-cells = <0>;

        ethphy0: ethernet-phy@0 {
            compatible = "ethernet-phy-ieee802.3-c22";
            reg = <0>;
            at803x,led-act-blind-workaround;
            at803x,eee-okay;
            at803x,vddio-1p8v;
        };
    };
};

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[santhosh2]

Igore,

 it says in u-boot log ethernet is not found (highlighted in bold letters). please find the log below

So do i need to change in uboot as above ? and also let me know how to do uboot configuration to select the ethernet driver DP83848

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U-Boot 2018.03-imx_v2018.03_4.14.78_1.0.0_ga+g7ade5b4 (Mar 11 2020 - 06:57:48 +0000)

CPU:   Freescale i.MX8MMQ rev1.0 1600 MHz (running at 1200 MHz)
CPU:   Industrial temperature grade (-40C to 105C) at 55C
Reset cause: POR
Model: FSL i.MX8MM EVK board
DRAM:  2 GiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
Loading Environment from MMC... *** Warning - bad CRC, using default environment

Failed (-5)
No panel detected: default to MIPI2HDMI
adv7535_init: Can't find device id=0x3d, on bus 1
Display: MIPI2HDMI (1920x1080)
Video: 1920x1080x24
In:    serial
Out:   serial
Err:   serial

 BuildInfo:
  - ATF d6451cc
  - U-Boot 2018.03-imx_v2018.03_4.14.78_1.0.0_ga+g7ade5b4

switch to partitions #0, OK
mmc1(part 0) is current device
flash target is MMC:1
Net:   No ethernet found.
Fastboot: Normal
Normal Boot
Hit any key to stop autoboot:

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[igorpadykov]

Hi Santhosh

for uboot seems you already created separate thread, please wait its resolution

I.MX8MMini : How to Enable TI Ethernet Chip DP83848 in uboot 

Best regards
igor

[santhosh2]

Igor,

My team mate had asked for the clarification on MII in I.Mx8mmini and It clearly says that MII is not supported in I.Mx8mmini hardware. Please ref to your blog response

https://community.nxp.com/message/1284259 

[igorpadykov]

Hi Santhosh

first please verify that it is working fine in uboot. In linux one can change dts:

&fec1 {
    phy-mode = "mii";

fsl-imx8mm-evk.dts\freescale\dts\boot\arm64\arch - linux-imx - i.MX Linux kernel 

for testing please look at "fec" tests:

doc\misc\test - imx-test - i.MX Driver Test Application Software 

Best regards
igor
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