16:17 <BorgCuba> While looking for S905 nand infos I stumbled upon some zircon/fuchsia code for amlogic. Has somebody here already tried to run fuchsia on s9xx?

17:57 <BorgCuba> Why does the matrix on the wiki say that NAND is not supported for s905 (while partially for S905D,X,W,..)?

17:58 <BorgCuba> Is the NAND controller on S905 (very) different?

17:58 <xdarklight> BorgCuba: the way the NAND IP is integrated has changed with S905X. the driver does not have support for the "old way" to integrate NAND

17:59 <BorgCuba> I see

17:59 <xdarklight> (I think the main reason is "lack of hardware to test this on")

18:00 <xdarklight> also does your board come with SLC or MLC/TLC flash?

18:00 <BorgCuba> I think MLC

18:00 <BorgCuba> Hy27???

18:00 <xdarklight> only the former is well-supported by Linux. there's limitations for MLC and TLC, for MLC you'll be limited to half of the overall flash size

18:05 <BorgCuba> xdarklight, I looked it up (1 vs 2bits per cell) but I would think the hardware on the nand chip would handle this. What would be the difference on the software side? Have to look into this.

18:07 <BorgCuba> xdarklight, this is what you meant: https://www.phoronix.com/scan.php?page=news_item&px=Linux-5.8-NAND-MLC-SLC-Emulate

18:09 <xdarklight> BorgCuba: for eMMC the difference is handled "in hardware" (rather in software: there's typically some controller software running). the NAND chip itself is dumb and so things need to be handled on the OS side. an example for MLC: let's say page 0 and 1 are "paired". writing to page 0 can corrupt data in page 1 and vice versa. Linux doesn't support this properly (yet) so you either cannot use it at all or you lose half the flash size