Sof nocodec #113
Sof nocodec #113
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The nocodec mode is required if there is no ACPI codec HID, otherwise the kernel will throw an error such as [ 9.612127] sof-audio-pci 0000:00:0d.0: error: no matching ASoC machine driver found - aborting probe [ 9.621634] sof-audio-pci 0000:00:0d.0: error: failed to get machine info -19 [ 9.629027] sof-audio-pci 0000:00:0d.0: error: failed to probe DSP hardware! Note that /lib/firmware/intel/sof/sof-byt.ri and /lib/firmware/intel/sof-tplg/sof-byt.tplg files need to be present for the probe to succeed, the nocodec mode depends on them Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Ferry Toth <ftoth@exalondelft.nl>
Signed-off-by: Ferry Toth <ftoth@exalondelft.nl>
Signed-off-by: Ferry Toth <ftoth@exalondelft.nl>
Signed-off-by: Ferry Toth <ftoth@exalondelft.nl>
To make this work a pulseaudio server needs to be started on edison. 1) create a user 2) systemctl --user start pulseaudio 3) sudo setfacl -m u:<user name>:rw /dev/snd/* 4) paplay "music.wav" On the host this will play to the Multifunction Composite Gadget input device. Signed-off-by: Ferry Toth <ftoth@exalondelft.nl>
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I force pushed the fixed up install of firmware, dropped old firmware and added a uac2 device to the usb gadget. I don't know if playing through this gadget uses the sof, but I can use it to play a wav from edison to my desktop PC. There I can again record the stream, I haven't found out yet how to directly play that stream to my speakers. |
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@andy-shev this applies @plbossart patch + downloads firmware and install in the correct place on the image. I dropped the legacy firmware as that is currently unused. As I understand sof needs a codec to work, and edison doesn't have one. So we can only really test his once we connect a codec and enable it through acpi. I believe the old sound driver/firmware also connected to bt but for now sof doesn't, so no bt sound devices are created. That might be a useful way to test sof without adding external hw. The last 2 patches enable uac2 which creates and gadget source and sink. I tested this by play back (paplay) a wav file. CPU load according to htop was low, irc 4%. But sof is not used by uac2. Should we apply this now? If so, I want to document getting play back to work first. |
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Merged, thanks! |
Package and install the sof-byt-nocodec