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
