18:01 <BorgCuba> Hello, is there a guide to install all the bootloaders and linux to NAND that applies to s905?

18:02 <BorgCuba> I like to try to build everything and then install it directly into NAND

18:02 <BorgCuba> And I want to install via USB

22:08 <BorgCuba> asdf28, do you know how the boot procedure for s905 works? From the datasheet it seem that eMMC and NAND both precede booting from sd-card and usb. I wonder if uboot looks for files on the SDC

22:09 <asdf28> sorry, i am not familiar at all with it

22:09 <asdf28> it's one of the things i have not touched yet, as it seems very complicated

22:10 <BorgCuba> okay, will have a look at the s905 uboot code

22:11 <asdf28> for example, i don't understand where it's booting from when the emmc is deleted

22:12 <asdf28> i mean, not booting

22:12 <asdf28> but it can still accept firmware using the USB tool

22:12 <asdf28> but yes, the normal booting process seems to be it's booting from the uboot that's installed with android

22:13 <asdf28> and this then boots from an sd card if there is one

22:14 <asdf28> this is what i found: https://github.com/Stane1983/uboot-amlogic/blob/35d0abeb8f232ee939b0547b0f5b5622ce44059a/common/cmd_bcb.c#L137

22:14 <asdf28> when i was trying to figure out how the reboot from an SD card works

22:16 <asdf28> but i don't know if this is the uboot that my android image uses

22:27 <asdf28> i also have no idea how to get the uboot source code that corresponds to a specific android version. as far as i understand, it's in the android SDK from amlogic, but that's not publicly available

22:49 <BorgCuba> asdf28, so you say the actual commands are stored in nand/emmc

23:08 <asdf28> no, i don't know

23:10 <asdf28> by actual commands you mean uboot?

23:21 <asdf28> as far as i understood it: board firmware loads uboot from eMMC, uboot determines the boot mode (cold boot, reboot, recovery reboot etc) and depending on that, checks if an sd card or usb memory is present and then loads the operating system from it

23:29 <asdf28> https://github.com/Stane1983/uboot-amlogic/blob/35d0abeb8f232ee939b0547b0f5b5622ce44059a/board/amlogic/configs/gxl_p212_v1.h#L190

23:29 <asdf28> this is the interesting part

23:31 <asdf28> there it also determines what to do when the reset button is held (go to update)

23:55 <BorgCuba> asdf28, interesting

23:55 <BorgCuba> thanks for pointing me there

23:56 <BorgCuba> I have to leave, bye