[U-Boot] i.MX6Q SPL won't boot U-Boot from NAND

[Jagan Teki]

On Wed, Jul 25, 2018 at 12:55 AM, Adam Ford <aford173 at gmail.com> wrote:
> I am trying to boot an i.MX6Q via SPL to U-Boot and eventually, use
> Falcon mode to start the kernel.  I can boot via SPL over USB.  I have
> enabled the NAND and SPL NAND, and i can confirm that mxs_nand_spl.c
> is being built in.  The board is imx6q_logic
>
> Unfortunately, I have run into two issues.
>
> 1.  Imxs_nand_init from mxs_nand_spl.c is trying to run
> nand_chip.scan_bbt(mtd), but nand_chip.scan_bbt hasn't been defined
> from what i can tell.
>
> There is a function called nand_default_bb which looks like it should
> be setup as the default for this, but I am not sure.  As-is, the
> system crashes when it attempts to run because it's a broken/NULL
> function pointer.  Is there something that should initialize this
> pointer and/or what should it reference?
>
> 2.  With the #1 commented out,  I get some error messages, but I am
> mostly concerned about the BCH read timeout.  I am asking if there is
> something missing.

Did you write the SPL from Linux?

>
> #define CONFIG_SYS_NAND_U_BOOT_OFFS    0x200000
>
>
> U-Boot SPL 2018.07-00031-g771af54de4-dirty (Jul 24 2018 - 14:18:14 -0500)
>>>spl:board_init_r()
> spl_early_init()
> Trying to boot from NAND
> spl: nand - using hw ecc
> 0x01:0xd3 erasesize=131072 (>>17)
> writesize=2048 (>>11)
> oobsize=64
> chipsize=1073741824

Look like something broken in between, I'm observing SPL looping while
loading spl_load_image

U-Boot SPL 2018.07-00368-g323a73adc9-dirty (Jul 25 2018 - 12:07:08 +0530)
>>spl:board_init_r()
spl_early_init()
I'm nand 12
Trying to boot from NAND
spl: nand - using hw ecc
0x2c:0xdc erasesize=262144 (>>18)
writesize=4096 (>>12)
oobsize=224
chipsize=536870912

U-Boot SPL 2018.07-00368-g323a73adc9-dirty (Jul 25 2018 - 12:07:08 +0530)
>>spl:board_init_r()
spl_early_init()
I'm nand 12
Trying to boot from NAND
spl: nand - using hw ecc
0x2c:0xdc erasesize=262144 (>>18)
writesize=4096 (>>12)
oobsize=224
chipsize=536870912

May be bisect with working commit can help us, here?