imx8qxp mek: Booting mainline kernel with mainline U-Boot

[Oliver Graute <oliver.graute@gmail.com>]

On 17/01/20, Lokesh Vutla wrote:
> >>> Just wondering if anyone else managed to boot mainline U-Boot with
> >>> mainline kernel on i.MX8QXP.
> >> I can test it for you with the revert patch for f0cc4eae9a applied tomorrow.
> > 
> > Adding in Lokesh as he nak'd the revert before because that would break
> > other platforms and I chimed in saying that breaking one set of
> > platforms to unbreak another set of platforms isn't a trade-off I like.
> > 
> 
> Right, the mentioned patch f0cc4eae9a1 ("core: device: use dev_power_domain_on")
> checks for power_domain return status when dm core tries to enable pd during
> probe. If power domain enabling is failed then no point proceeding further to probe.
> 
> There are 2 ways to solve this:
> 1) Drop the return check like below. Which IMHO is a hack:
> 
> diff --git a/drivers/core/device.c b/drivers/core/device.c
> index 9f39218423..c80ce16fbd 100644
> --- a/drivers/core/device.c
> +++ b/drivers/core/device.c
> @@ -432,11 +432,8 @@ int device_probe(struct udevice *dev)
> 
>  	if (CONFIG_IS_ENABLED(POWER_DOMAIN) && dev->parent &&
>  	    (device_get_uclass_id(dev) != UCLASS_POWER_DOMAIN) &&
> -	    !(drv->flags & DM_FLAG_DEFAULT_PD_CTRL_OFF)) {
> -		ret = dev_power_domain_on(dev);
> -		if (ret)
> -			goto fail;
> -	}
> +	    !(drv->flags & DM_FLAG_DEFAULT_PD_CTRL_OFF))
> +		dev_power_domain_on(dev);
> 
>  	ret = uclass_pre_probe_device(dev);
>  	if (ret)

ok very thx, this works for me together with fresh a compiled scfw
(1.2.5) from advantech. Now I'am running into this phy issue:

U-Boot 2020.01-00001-g7b3e47a09f (Jan 23 2020 - 14:30:03 +0100)

CPU:   NXP i.MX8QM RevB A53 at 1200 MHz

Model: Advantech iMX8QM Qseven series
Board: ROM-7720-A1 4GB
Build: SCFW 494c97f3, SECO-FW 5ea79733, ATF d6451cc
Boot:  SD2
DRAM:  4 GiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2
Loading Environment from MMC... *** Warning - bad CRC, using default environment

In:    serial at 5a060000
Out:   serial at 5a060000
Err:   serial at 5a060000
Net:   Could not get PHY for FEC0: addr 0
Could not get PHY for FEC0: addr 0
Can't find FEC0 clk rate: -19
Could not get PHY for FEC1: addr 1
No ethernet found.

Hit any key to stop autoboot:  0 
switch to partitions #0, OK
mmc2 is current device
** No partition table - mmc 2 **
** No partition table - mmc 2 **
Booting from net ...
Could not get PHY for FEC0: addr 0
Could not get PHY for FEC0: addr 0
Could not get PHY for FEC0: addr 0
Could not get PHY for FEC0: addr 0
No ethernet found.
Could not get PHY for FEC0: addr 0
Could not get PHY for FEC0: addr 0
Could not get PHY for FEC0: addr 0
Could not get PHY for FEC0: addr 0
Could not get PHY for FEC0: addr 0
No ethernet found.
Could not get PHY for FEC0: addr 0

Best Regards,

Oliver