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Re: [PATCH 5/6] mtd: nand: gpmi: correct bitflip for erased NAND page

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Dear Han Xu,


Il 28/07/2015 19:50, Han Xu ha scritto:
> i.MX6QP and i.MX7D BCH module integrated a new feature to detect the
> bitflip number for erased NAND page. So for these two platform, set the
> erase threshold to gf/2 and if bitflip detected, GPMI driver will
> correct the data to all 0xFF.


That's an iteresting feature of iMX6QP
We were discussing about erased NAND page bitflip in MTD ML a few days ago.

Is gf/2 a right value to choose? Why?
IIUC, in a previuos MTD-level patch [1] Brian used ECC strength as 
threshold.

Could you please also share with which NAND device you tested this patch?

Kind regards and TIA,

-- 

Andrea SCIAN

DAVE Embedded Systems

[1] http://article.gmane.org/gmane.linux.drivers.mtd/52216
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Re: [PATCH 5/6] mtd: nand: gpmi: correct bitflip for erased NAND page Andrea Scian <rnd4@dave-tech.it> - 2015-07-29 10:30 +0200
  Re: [PATCH 5/6] mtd: nand: gpmi: correct bitflip for erased NAND page Han Xu <xhnjupt@gmail.com> - 2015-07-29 16:40 +0200

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