[U-Boot] mx6cuboxi: Detecting wrong .dtb (v2019.01)

[Baruch Siach <baruch@tkos.co.il>]

Hi Fabio, Vagrant,

Thanks for the referral.

Vagrant, please find my response inline below.

On Wed, Feb 13 2019, Fabio Estevam wrote:
> Thanks for the report.
>
> Adding Jon and Baruch on Cc in case they could take a look at it.
>
> On Wed, Feb 13, 2019 at 2:52 PM Vagrant Cascadian <vagrant@debian.org> wrote:
>>
>> I *think* this board is getting the wrong fdtfile set:

What hardware are you running? Is it a Cubox-i?

What is your actual problem?

>> U-Boot 2019.01+dfsg-1 (Jan 15 2019 - 00:36:19 +0000)
>>
>> CPU:   Freescale i.MX6Q rev1.5 996 MHz (running at 792 MHz)
>> CPU:   Extended Commercial temperature grade (-20C to 105C) at 37C
>> Reset cause: WDOG
>> Board: MX6 Cubox-i
>> DRAM:  3.8 GiB
>> MMC:   FSL_SDHC: 0, FSL_SDHC: 1
>> Loading Environment from MMC... *** Warning - bad CRC, using default
>> environment
>>
>> No panel detected: default to HDMI
>> Display: HDMI (1024x768)
>> In:    serial
>> Out:   serial
>> Err:   serial
>> Card did not respond to voltage select!
>> Net:   FEC
>> Hit any key to stop autoboot:  0
>> => printenv som_rev
>> som_rev=undefined
>> => printenv has_emmc
>> has_emmc=undefined
>> => printenv findfdt
>> findfdt=if test ${board_rev} = MX6Q; then setenv fdtprefix imx6q; fi; if
>> test ${board_rev} = MX6DL; then setenv fdtprefix imx6dl; fi; if test
>> ${som_rev} = V15; then setenv fdtsuffix -som-v15; fi; if test
>> ${has_emmc} = yes; then setenv emmcsuffix -emmc; fi; if test
>> ${board_name} = HUMMINGBOARD2 ; then setenv fdtfile
>> ${fdtprefix}-hummingboard2${emmcsuffix}${fdtsuffix}.dtb; fi; if test
>> ${board_name} = HUMMINGBOARD ; then setenv fdtfile
>> ${fdtprefix}-hummingboard${emmcsuffix}${fdtsuffix}.dtb; fi; if test
>> ${board_name} = CUBOXI ; t=>
>> => run findfdt
>> => printenv fdtfile
>> fdtfile=imx6q-cubox-i.dtb
>>
>> It pretty clearly identifies itself as a rev1.5 in the boot message, but
>> som_rev is set to undefined, and so it sets fdtfile to the default
>> version.

Where do you see a rev1.5 identification? This string:

  CPU:   Freescale i.MX6Q rev1.5 996 MHz (running at 792 MHz)

refers to the revision of the i.MX6 SoC. It has nothing to do with the
SOM revision.

>> I haven't had a chance to check a newer version of u-boot, but I don't
>> see any obvious changes for this board since v2019.01.
>>
>> My *hunch* is it's either of these two commits, since it was detecting
>> it correctly in v2018.07:
>>
>> 19ed6063a567c6924dbfc358bf4ce9a60a31c567
>> mx6cuboxi: Use mmc_get_op_cond() to check for an eMMC
>>
>> 86e5a7fc13d4eb7e21630b9d421469c663dc8c77
>> mx6cuboxi: Add support for eMMC booting

So something that used to work with v2018.07 fails now with v2019.01,
right? What is it?

baruch

-- 
     http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
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