Rpi-dac overlay

grael · 7 April 2015 23:05

Hello, I’m following the osmc development with great interest!

I can see in git that the (fairly new, maybe kernel 3.18.11) rpi-dac-overlay is missing.
Line 76 here

osmc/osmc/blob/master/package/kernel-osmc/build.sh


# (c) 2014-2015 Sam Nazarko
# email@samnazarko.co.uk

#!/bin/bash

# initramfs flags

INITRAMFS_BUILD=1
INITRAMFS_EMBED=2
INITRAMFS_NOBUILD=4

sign_module () {

# Generic function to sign kernel module with key

if [ "$SIGN_KERNEL" -eq 0 ]; then
    echo "* Ignoring request to sign kernel module $1 as device does not request it"
    return
else

This file has been truncated. show original

Should it be possible to add it in a future release?
It’s the only audio device that activates i2s audio output without any other check. So it’s the only one I can use for my diy dac.

Thanks!

sam_nazarko · 8 April 2015 01:28

We’ve added HiFiBerry and iqAudio’s overlays. I did not realise this was necessary, but as per your request, I will add this in the next kernel release.

S

grael · 8 April 2015 10:59

Thanks!

This overlay is not “necessary”, Hifiberry and iqAudio overlays are enough to make these specific audio cards working.
But they are using i2c communication to initialize these dacs and this will fail if not using exactly the same cards.

Rpi-dac overlay allows to use i2s outputs without further initialization, so it’s the only device you can use if you want i2s output for general use (not for specific commercial dacs)

Keep up the good work
(by the way, kernel 3.18.11 is up! )

sam_nazarko · 8 April 2015 17:10

Will rebase to 3.18.11 and add the overlay now.

grael · 8 April 2015 18:41

Awesome, you rule!

grael · 15 April 2015 19:55

Kernel 3.18.11 didn’t make it to the RC2?

sam_nazarko · 15 April 2015 21:15

It did – you should be on 3.18.11-1

S

heidi1303 · 16 April 2015 09:23

3.18.11-1 is in the apt repo, but yesterday rbp1-kernel-osmc was still depending on 3.18.10-1

grael · 16 April 2015 10:35

I had the same impression on a RPI2.
It was an upgrade from RC1, not a new RC2 from scratch, if it matters

sam_nazarko · 17 April 2015 02:08

That’s not good – I’ll check that out

S

grael · 18 April 2015 12:40

I tried to reinstal RC2 from scratch.
Kernel 3.18.10 too.

cocomic · 29 April 2015 10:17

Since 3.18.11 got skipped in RC2, maybe we can get 3.18.12 in RC3 (or final) - now that it’s been added in the firmware.