Re: [PATCH 2/3] mtd: rawnand: sunxi: support randomized OOB formats

[Miquel Raynal]

On 10/08/2026 at 17:04:50 -06, James Hilliard <james.hilliard1@xxxxxxxxx> wrote:

> The controller randomizer covers the bad block marker along with the
> rest of the OOB data. The driver currently compensates the marker bytes
> before writes and after reads so that they remain plain on flash.
>
> Allwinner NAND firmware instead stores the marker through the
> randomizer. Media using that format appears to contain bad blocks unless
> the randomizer is enabled while reading the marker.
>
> Honor the allwinner,randomized-oob property by unconditionally enabling
> page scrambling and leaving the marker in the randomizer data stream.
> Keep the existing plain marker behavior when the property is absent.
> This changes marker handling on all supported controllers; the H6/H616
> protected user-data placement is handled separately.

But I think the reason why this has never been done is because it just
breaks raw accesses, including the BBT reads. I don't think this is
handled, is it?

Thanks,
Miquèl