[U-Boot] [PATCH v7 2/3] mmc: meson: add MMC driver for Meson GX (S905)

[Heinrich Schuchardt]

On 04/15/2017 10:34 PM, Andreas Färber wrote:
> Am 15.04.2017 um 20:27 schrieb Alexander Graf:
>> On 15.04.17 20:18, Heiner Kallweit wrote:
>>> Am 15.04.2017 um 17:05 schrieb Andreas Färber:
>>>> But for the Vega S95 Telos I needed to disable the first of three MMC
>>>> nodes (SDIO) - otherwise U-Boot would happily iterate over them for
>>>> distro boot with Heinrich's patch, but GRUB would come up with no disks,
>>>> so that booting failed. I'm not yet sure why, maybe it's a UEFI-side
>>>> problem in that it is the first MMC device that is absent rather than
>>>> the last one?
>>>>
>>> I don't own this device so I can just provide a guess.
>>> Based on DT the device ordering most likely is:
>>> mmc0: SDIO
>>> mmc1: SD
>>> mmc2: eMMC
> [...]
>> If grub comes up, distro boot has successfully found the target binary
>> and executed it. For some reason, grub can not find its boot origin though.
>>
>> Andreas, please add debug prints like the ones below and check that the
>> device names match:
> 
> U-Boot 2017.05-rc1-00318-g082535f-dirty (Apr 15 2017 - 22:29:17 +0200)
> vega-s95
> 
> DRAM:  2 GiB
> MMC:   mmc at 70000: 0, mmc at 72000: 1, mmc at 74000: 2
> Using default environment
> 
> In:    serial at 4c0
> Out:   serial at 4c0
> Err:   serial at 4c0
> Net:   eth0: ethernet at c9410000
> Hit any key to stop autoboot:  0
> mmc_init: -95, time 1806
> MMC Device 0 not found
> no mmc device at slot 0
> switch to partitions #0, OK
> mmc1 is current device
> Scanning mmc 1:1...
> Setting boot device name to '//boot/dtb/amlogic/meson-gxbb-v'
> 20335 bytes read in 43 ms (460.9 KiB/s)
> Found EFI removable media binary efi/boot/bootaa64.efi
> Setting boot device name to '/efi/boot/bootaa64.efi'
> reading efi/boot/bootaa64.efi
> 129024 bytes read in 13 ms (9.5 MiB/s)
> ## Starting EFI application at 01080000 ...
> mmc_init: -95, time 1807
> Found 0 disks
> Welcome to GRUB!
> 
> error: disk `,msdos2' not found.
> Entering rescue mode...
> grub rescue>
> 
> Regards,
> Andreas
> 
What is the output of
ls
in grub rescue mode?

Best regards

Heinrich