sry i only have questions in this email :)
- how would we speed up building? so that other can get binaries at least for the "base" of the nixos. - would we just hook up rpi's into hydra? can we hook this to existing hydra.nixos.org or we would have to come with our own hydra. - can we also collect this knowledge in some kind of manual, be it part of nixos manual or completely separated. - i'm still waiting for my rpi3 to arrive, but where can i help until then? i'd love to have proper support for rpi in nixpkgs. On Wed, Jul 20, 2016 at 12:05 AM, Lluís Batlle i Rossell <[email protected]> wrote: > On Tue, Jul 19, 2016 at 11:53:59PM +0200, Tomas Hlavaty wrote: >> Lluís Batlle i Rossell <[email protected]> writes: >> > The device tree blob should be built by the kernel, like with pi and pi2, >> > isn't it? >> >> This is the kernel which works for me and is taken from >> raspberry-firmware/boot: >> >> Linux version 4.4.13-v7+ (dc4@dc4-XPS13-9333) (gcc version 4.9.3 >> (crosstool-NG crosstool-ng-1.22.0-88-g8460611) ) #894 SMP Mon Jun 13 >> 13:13:27 BST 2016 >> >> and the corresponding device tree is bcm2710-rpi-3-b.dtb. >> >> This looks like the same kernel version in >> pkgs/os-specific/linux/kernel/linux-rpi.nix (modDirVersion = "4.4.13"; >> tag = "1.20160620-1") >> >> Are you saying that this is not good enough? >> >> What works: If I copy files from raspberry-firmware/boot to /boot, rpi3 >> starts fine. These are the files I have in /boot: >> >> $ ls -al /boot >> -rwxr-xr-x 1 root root 13221 Jun 18 22:31 bcm2708-rpi-b.dtb >> -rwxr-xr-x 1 root root 13484 Jun 18 22:31 bcm2708-rpi-b-plus.dtb >> -rwxr-xr-x 1 root root 13257 Jun 18 22:31 bcm2708-rpi-cm.dtb >> -rwxr-xr-x 1 root root 14567 Jun 18 22:31 bcm2709-rpi-2-b.dtb >> -rwxr-xr-x 1 root root 15237 Jun 18 22:31 bcm2710-rpi-3-b.dtb >> -rwxr-xr-x 1 root root 17932 Jun 18 22:31 bootcode.bin >> -rwxr-xr-x 1 root root 165 Jul 19 22:46 cmdline.txt >> -rwxr-xr-x 1 root root 1369 Jan 11 2016 config.txt >> -rwxr-xr-x 1 root root 2504 Jun 23 20:42 fixup_cd.dat >> -rwxr-xr-x 1 root root 6482 Jun 23 20:42 fixup.dat >> -rwxr-xr-x 1 root root 9717 Jun 23 20:42 fixup_db.dat >> -rwxr-xr-x 1 root root 9717 Jun 23 20:42 fixup_x.dat >> -rwxr-xr-x 1 root root 4224232 Jun 18 22:31 kernel7.img >> drwxr-xr-x 2 root root 8192 Jun 18 22:31 overlays >> -rwxr-xr-x 1 root root 617432 Jun 23 20:42 start_cd.elf >> -rwxr-xr-x 1 root root 4926264 Jun 23 20:42 start_db.elf >> -rwxr-xr-x 1 root root 2746552 Jun 23 20:42 start.elf >> -rwxr-xr-x 1 root root 3877720 Jun 23 20:42 start_x.elf >> >> I don't see, why raspberrypi/builder.sh creates defaultgeneration, >> initrd and nixos-init files in /boot. It actually seems to me, that >> initrd should not be there at all for the boot to work. >> >> raspberrypi/builder.sh doesn't create fixup_x.dat, which is in the list >> above; but I haven't tried booting without it. >> >> Although pkgs/os-specific/linux/kernel/linux-rpi.nix copies DTB files, >> it renames them to something that looks wrong and also it does not copy >> them to /boot at all: >> >> # I am not sure if all of these are correct... >> copyDTB bcm2708-rpi-b.dtb bcm2835-rpi-a.dtb >> copyDTB bcm2708-rpi-b.dtb bcm2835-rpi-b.dtb >> copyDTB bcm2708-rpi-b.dtb bcm2835-rpi-b-rev2.dtb >> copyDTB bcm2708-rpi-b-plus.dtb bcm2835-rpi-a-plus.dtb >> copyDTB bcm2708-rpi-b-plus.dtb bcm2835-rpi-b-plus.dtb >> copyDTB bcm2708-rpi-b-plus.dtb bcm2835-rpi-zero.dtb >> copyDTB bcm2708-rpi-cm.dtb bcm2835-rpi-cm.dtb >> copyDTB bcm2709-rpi-2-b.dtb bcm2836-rpi-2-b.dtb >> copyDTB bcm2710-rpi-3-b.dtb bcm2837-rpi-3-b.dtb >> >> I looks like the files in raspberry-firmware/boot should work on any rpi >> version so we should probably immitate that somehow in nixos and at >> least get it to work out of the box even if we just take the precompiled >> files from raspberrypi-firmware/boot and improve that later. > > I don't remember any of the details. I'm using it in rpi2 just fine. I > could forget some file, and I may have written code that is fit just for a > very specific kernel version. Maybe it has all changed in 4.4. > > The relevant detail that I remember is that the kernel recipe is told to > build the DTB, so I think that you should not need any dtb from the > firmwarefiles/boot. > > Regards, > Lluís. > > -- > (Escriu-me xifrat si saps PGP / Write ciphered if you know PGP) > PGP key D4831A8A - https://emailselfdefense.fsf.org/ > _______________________________________________ > nix-dev mailing list > [email protected] > http://lists.science.uu.nl/mailman/listinfo/nix-dev -- Rok Garbas https://garbas.si _______________________________________________ nix-dev mailing list [email protected] http://lists.science.uu.nl/mailman/listinfo/nix-dev
