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Replacing #3958, now with the correct branch!
Hi,
this series will enable the use of the SOF Linux stack without DSP offloading.
In this mode no firmware loading will happen, the topology parsing is going to be reduced to only look for the DAI widget(s) and the IPC dependent callbacks are going to be ignored.
This mode can give another level of hardware verification on platforms where the DSP can be ignored and the audio interfaces can be tested directly.
On Intel platforms we can use this mode to verify programming flows against the legacy HDA stack if there is a need to debug in that level and don't have the DSP programming sequences interfering.
The use of DSPless mode is governed by the SOF_DBG_DSPLESS_MODE flag which is only going to be set if the user sets sof_debg=0x8000 and the platform advertises that the DSPless mode is supported on them.