Trouble booting with mt8183

[Jared Baur]

I am looking for some advice for configuring coreboot with a uImage fit payload for an mt8183 chromebook (Kukui Fennel)? I have said fitimage, I've modified the memlayout for the mt8183 board similar to https://github.com/coreboot/coreboot/commit/22e605c2c06f553b98131a87b634709a... so that the fitimage fits in the cbfs and has space to load, and coreboot successfully builds. I've also enabled a bunch of debug settings for coreboot printing to serial. When flashing the ROM and rebooting, the serial console doesn't show anything past bootrom messages like so:

```
[DL] 00000000 00000000 010701

F0: 102B 0000
F3: 1006 0033 [0200]
F3: 4001 00E0 [0200]
F3: 0000 0000
V0: 0000 0000 [0001]
00: 1027 0002
01: 0000 0000
BP: 0C00 0251 [0000]
G0: 1182 0000
EC: 0004 0000 [0001]
S7: 0000 0000 [0000]
CC: 0000 0000 [0001]
T0: 0000 00DB [000F]
Jump to BL
```

I am happy to post any configuration that would be helpful. I am hoping to just get some serial output from coreboot at this point in time, regardless of the payload.

Trouble booting with mt8183 (google/kukui)

[Paul Menzel]

[Cc: +Mediatek SOC maintainers]

Dear Jared,

Thank you for your message. I am sorry, nobody replied yet.

Am 04.07.23 um 17:24 schrieb Jared Baur:
> I am looking for some advice for configuring coreboot with a uImage
> fit payload for an mt8183 chromebook (Kukui Fennel)? I have said
> fitimage, I've modified the memlayout for the mt8183 board similar to
> https://github.com/coreboot/coreboot/commit/22e605c2c06f553b98131a87b634709a...
> so that the fitimage fits in the cbfs and has space to load, and
> coreboot successfully builds. I've also enabled a bunch of debug
> settings for coreboot printing to serial. When flashing the ROM and
> rebooting, the serial console doesn't show anything past bootrom
> messages like so: >
> [DL] 00000000 00000000 010701
>
> F0: 102B 0000
> F3: 1006 0033 [0200]
> F3: 4001 00E0 [0200]
> F3: 0000 0000
> V0: 0000 0000 [0001]
> 00: 1027 0002
> 01: 0000 0000
> BP: 0C00 0251 [0000]
> G0: 1182 0000
> EC: 0004 0000 [0001]
> S7: 0000 0000 [0000]
> CC: 0000 0000 [0001]
> T0: 0000 00DB [000F]
> Jump to BL
>
> I am happy to post any configuration that would be helpful. I am
> hoping to just get some serial output from coreboot at this point in
> time, regardless of the payload.

It’d be great, if you attached your configuration file and output of 
`build/cbfstool build/coreboot.rom print`.

Kind regards,

Paul

Trouble booting with mt8183 (google/kukui)

[Yu-Ping Wu]

Hi Jared,

MT8183 is able to boot from eMMC/UFS only (but not SPI-NOR). Therefore for
the Kukui Chromebook, we decided to emulate eMMC from EC (which contains
the bootblock). I guess the problem is that your EC doesn't contain a valid
bootblock. Did you ever flash an EC image to the Chromebook?

Did you modify any Kconfig options (in particular those related to
bootblock)? Please also double check if CONFIG_CONSOLE_SERIAL is enabled.

On Mon, Aug 14, 2023 at 7:02 PM Paul Menzel  wrote:
> [Cc: +Mediatek SOC maintainers]
>
> Dear Jared,
>
> Thank you for your message. I am sorry, nobody replied yet.
>
> Am 04.07.23 um 17:24 schrieb Jared Baur:
> > I am looking for some advice for configuring coreboot with a uImage
> > fit payload for an mt8183 chromebook (Kukui Fennel)? I have said
> > fitimage, I've modified the memlayout for the mt8183 board similar to
>
> https://github.com/coreboot/coreboot/commit/22e605c2c06f553b98131a87b634709a...
> > so that the fitimage fits in the cbfs and has space to load, and
> > coreboot successfully builds. I've also enabled a bunch of debug
> > settings for coreboot printing to serial. When flashing the ROM and
> > rebooting, the serial console doesn't show anything past bootrom
> > messages like so: >
> > [DL] 00000000 00000000 010701
> >
> > F0: 102B 0000
> > F3: 1006 0033 [0200]
> > F3: 4001 00E0 [0200]
> > F3: 0000 0000
> > V0: 0000 0000 [0001]
> > 00: 1027 0002
> > 01: 0000 0000
> > BP: 0C00 0251 [0000]
> > G0: 1182 0000
> > EC: 0004 0000 [0001]
> > S7: 0000 0000 [0000]
> > CC: 0000 0000 [0001]
> > T0: 0000 00DB [000F]
> > Jump to BL
> >
> > I am happy to post any configuration that would be helpful. I am
> > hoping to just get some serial output from coreboot at this point in
> > time, regardless of the payload.
>
> It’d be great, if you attached your configuration file and output of
> `build/cbfstool build/coreboot.rom print`.
>
> Kind regards,
>
> Paul