[bug report] sunxi: H6: no ethernet on Orange Pi One Plus

[Anne Macedo]

On Wed, Jul 05, 2023 at 03:24:23PM +0000, Anne Macedo wrote:
> On Wed, Jul 05, 2023 at 10:46:25AM -0300, Fabio Estevam wrote:
> > Hi Anne,
> > 
> > On Tue, Jul 4, 2023 at 8:52 PM Anne Macedo <retpolanne at posteo.net> wrote:
> > >
> > > Hey!
> > >
> > > I'm trying to bake Linux images for the Orange Pi One Plus using Yocto.
> > > Everything works fine, except for Ethernet.
> > >
> > > On the u-boot prompt:
> > >
> > > => dhcp
> > > No ethernet found.
> > >
> > > After adding:
> > >
> > > CONFIG_SPL_SPI_SUNXI=y
> > > CONFIG_SUN8I_EMAC=y
> > >
> > > to configs/orangepi_one_plus_defconfig, I started seeing this error:
> > >
> > > => dhcp
> > > sun8i_emac_eth_start: Timeout
> > >
> > > I saw this other bug report but I couldn't really understand what has
> > > been made to fix this issue [1].
> > >
> > > More context here [2].
> > >
> > > [1] https://lists.denx.de/pipermail/u-boot/2021-June/451357.html
> > 
> > Does it help if you revert 4f0278dac56a658ef1e0967fec0bb95372a875bd ?
> > 
> 
> Hey! After reverting the commit, but with PMIC disabled:
> 
> => dhcp
> mdio_register: non unique device name 'ethernet at 5020000'
> Could not get PHY for ethernet at 5020000: addr 1
> 
> > I added on CC the folks involved in the previous report.
> 
> Regards,
> Anne

I think I'm on the right path :)  

1. Included SUNXI_SETUP_REGULATORS=0 to the bl31 make
2. Changed the phy mode on arch/arm/dts/sun50i-h6-orangepi-one-plus.dts
   From rgmii-id to rgmii
   More info on [1][2][3]
3. Added this configs to configs/orangepi_one_plus_defconfig:
   CONFIG_SPL_SPI_SUNXI=y
   CONFIG_SUNXI_NO_PMIC=y
   CONFIG_SUN8I_EMAC=y

Result: 

U-Boot 2023.04-gfd4ed6b (Apr 03 2023 - 20:38:50 +0000) Allwinner
Technology

CPU:   Allwinner H6 (SUN50I)
Model: OrangePi One Plus
DRAM:  1 GiB 
Core:  55 devices, 17 uclasses, devicetree: separate
WDT:   Not starting watchdog at 7020400
MMC:   mmc at 4020000: 0
Loading Environment from FAT... Unable to read "uboot.env" from
mmc0:1...
In:    serial at 5000000
Out:   serial at 5000000
Err:   serial at 5000000
Net:   eth0: ethernet at 5020000

=> dhcp
sun8i_emac_eth_start: Timeout
=> mdio list
ethernet at 5020000:
1 - Generic PHY <--> ethernet at 5020000

Still no interface on Linux, but at least eth0 is detected on u-boot?

[1] https://forum.armbian.com/topic/7108-orangepi-zero-plus-ethernet-in-u-boot/
[2] https://forum.openwrt.org/t/sunxi-target-broken-in-master/110643/12
[3] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/net/phy/realtek.c?h=v5.10.79&id=bbc4d71d63549bcd003a430de18a72a742d8c91e

Regards,
Anne