** Description changed: + [Impact] + First reported on the Raspberry Pi forums (https://forums.raspberrypi.com/viewtopic.php?p=2162847), I've since confirmed that the Raspberry Pi DAC+ HAT (formerly the IQaudIO DAC+ HAT, which is basically the same board) works happily under RaspiOS on the Pi 5, but not Ubuntu 23.10 or 24.04. The board *does* work on Ubuntu on prior models, including 3B+ and 4B (those are all I've tested so far), but it does require the overlay (iqaudio-dacplus or rpi-dacplus depending on the variant) to be manually specified in config.txt (RaspiOS automatically detects and loads the board; I haven't figured out why we don't yet but that's an additional data-point that may be worth exploring). Anyway, on the Pi 5 the HAT is detected (/proc/device-tree/hat/uuid is populated with the correct value, and /proc/device-tree/hat/product lists "Pi-DAC+" which is correct), but the following appears in dmesg: [ 7.383734] designware-i2s 1f000a0000.i2s: Missing dma channel for stream: 0 [ 7.392977] designware-i2s 1f000a0000.i2s: ASoC: error at snd_soc_pcm_component_new on 1f000a0000.i2s: -22 [ 7.403212] snd-rpi-iqaudio-dac soc:sound: ASoC: can't create pcm Raspberry Pi DAC+ HiFi :-22 [ 7.405612] rpivid 1000800000.codec: bcm2712_iommu_of_xlate: MMU 1000005100.iommu [ 7.416183] rpivid 1000800000.codec: bcm2712_iommu_probe_device: MMU 1000005100.iommu [ 7.418036] snd-rpi-iqaudio-dac soc:sound: snd_soc_register_card() failed: -22 + + [Test Case] + + See impact above. + + [Fix] + + Build AXI dma driver into the kernel rather than a loadable module. + + [Where Problems Could Occur] + + At boot and when SPI-devices are attached.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2060240 Title: Pi DAC+ fails on Pi 5 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/2060240/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
