On 26. 12. 21 12:43, Christian Hewitt wrote:
**** List of PLAYBACK Hardware Devices **** card 0: LIBRETECHCC [LIBRETECH-CC], device 0: fe.dai-link-0 (*) [] Subdevices: 1/1 Subdevice #0: subdevice #0
numid=12,iface=PCM,name='ELD',device=2 numid=11,iface=PCM,name='IEC958 Playback Default',device=2 numid=10,iface=PCM,name='IEC958 Playback Mask',device=2 numid=9,iface=PCM,name='Playback Channel Map',device=2
https://github.com/torvalds/linux/blob/master/arch/arm64/boot/dts/amlogic/me...
Have you tried to reorder the dai-link-# sections in DT? It appears to me that sound/soc/codecs/hdmi-codec.c / hdmi_codec_pcm_new() gets the internal PCM device rather than the exported PCM device for the user space.
If the DAI routing cannot be changed, then the hdmi-codec.c should be modified to export the correct device number for the user space:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/soun...
Jaroslav