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charset=UTF-8 Content-Transfer-Encoding: 7bit On 19/08/2024 22:53, Jens Reidel wrote: > Hi everyone, > > I am currently bringing up Xiaomi SM8450/SM8475 mobile phones and have a few > working well enough to try and get the WCD and audio in general working. All > is fine, until this: > > [ 35.366229] qcom-apm gprsvc:service:2:1: Direct firmware load for qcom/ > sm8450/Xiaomi 12-tplg.bin failed with error -2 > [ 35.366244] qcom-apm gprsvc:service:2:1: tplg firmware loading qcom/sm8450/ > Xiaomi 12-tplg.bin failed -2 > [ 35.366250] qcom-apm gprsvc:service:2:1: ASoC: error at > snd_soc_component_probe on gprsvc:service:2:1: -2 > > After searching around a bit, I stumbled across this Linaro repository: > https://git.codelinaro.org/linaro/qcomlt/audioreach-topology > Apparently you're supposed to write the topology in a M4-preprocessed file that > gets turned into an ALSA UCM topology config and then compiled with alsatplg. > However, there is zero documentation on the preprocessor macros and how you're > actually supposed to write the topology file. Am I missing something or is > there no public documentation and tooling for how to use this kernel > interface? Hi Jens, I am not aware of any documentation related to audioreach topology. I used existing code as example/starting point and then with learning of internals and digging I managed to get some grasp, but it was all without any docs. If your platform uses reference Qualcomm components, like WSA speakers on Soundwire bus, then most likely you can re-use HDK8450 topology or anything newer. Best regards, Krzysztof