Re: [U-Boot] [PATCH 2/2] mtd:mxs:nand support oobsize bigger than 512

On Friday, December 19, 2014 at 05:39:13 AM, Peng Fan wrote:

If ecc chunk data size is 512 and oobsize is bigger than 512, there is a chance that block_mark_bit_offset conflicts with bch ecc area.

The following graph is modified from kernel gpmi-nand.c driver with each data block 512 bytes. We can see that Block Mark conflicts with ecc area from bch view. We can enlarge the ecc chunk size to avoid this problem to those oobsize which is larger than 512.

What exactly is the impact of this patch for current installations of U-Boot? Does the NAND need to be rewritten with new content? Is the format introduced by this patch compatible with Linux?

Thanks!

Best regards, Marek Vasut