| 1 Jun 2025 |
 K900 | Which means they technically don't need XGSPON equipment | 17:56:59 |
 emily | right. the 1800/120 service I'm hoping to get soon is GPON | 18:00:31 |
| emily | shame about the 120. | 18:00:41 |
| K900 | I'm getting what's supposed to be 1gbps symmetric | 18:18:22 |
| K900 | (it's not, because pon lol) | 18:18:28 |
| emily | the overprovisioning here is significant enough that I seem to reliably get what i'm meant to | 18:19:25 |
| emily | K900: the BPI-R4 can't see the SD when booting from NAND, right? so I guess you have to use either eMMC or an M.2 to boot if you flash a U-Boot to NAND? | 18:39:54 |
| K900 | I don't think that's a thing? | 18:40:16 |
| emily | what do you mean? | 18:40:46 |
| emily | it's documented pretty much everywhere that it can't see SD and eMMC at the same time. hence the two DTs | 18:40:59 |
| K900 | It shouldn't have anything to do with booting from NAND | 18:41:01 |
| K900 | It does have to do with the device tree | 18:41:13 |
| emily | they document the procedure to flash eMMC as flash from SD to NAND -> flash from NAND to eMMC | 18:41:17 |
| K900 | Because there's only one SDIO controller | 18:41:25 |
| emily | hmm. | 18:41:33 |
| K900 | And it's muxed to one or the other | 18:41:47 |
| K900 | But that doesn't have anything to do with NAND | 18:42:04 |
| emily | are you sure? I don't see how ^ would work if so, because you'd be using the SD-seeing device tree on the NAND to flash the eMMC | 18:42:06 |
| K900 | You don't have to do that? | 18:42:20 |
| K900 | I just put uboot on the NAND and booted off a USB stick | 18:42:30 |
| emily | what I mean is that it's their documented procedure | 18:42:33 |
| K900 | And used that to write to the eMMC | 18:42:40 |
| emily | fwiw https://forum.banana-pi.org/t/bpi-r4-u-boot-on-nand-but-activating-emmc-instead-sd/19754/2 also implies NAND means eMMC rather than SD in hardware. (but he could be wrong. I figured he would know more than the average forum poster since he has the pile of kernel patches but that might be a dangerous assumption.) | 18:43:11 |
| emily | but if I can just change the device tree on the U-Boot end to get SD access with the NAND boot then that would be convenient right now. | 18:45:00 |
| K900 | Uhhh | 18:45:13 |
| K900 | Definitely no | 18:45:16 |
| emily | to which? | 18:45:47 |
| K900 | You definitely can change the DT in uboot but you'd need to flash a new uboot | 18:45:57 |
| K900 | In reply to @emilazy:matrix.org
fwiw https://forum.banana-pi.org/t/bpi-r4-u-boot-on-nand-but-activating-emmc-instead-sd/19754/2 also implies NAND means eMMC rather than SD in hardware. (but he could be wrong. I figured he would know more than the average forum poster since he has the pile of kernel patches but that might be a dangerous assumption.) To this | 18:46:04 |
| emily | right | 18:46:09 |
