DMIC API Test
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This test is designed to verify that DMIC peripherals implement the API
correctly. It performs the following checks:
* Verify the DMIC will not start sampling before it is configured
* Verify the DMIC can sample from one left channel
* Verify the DMIC can sample from a stereo L/R pair
* Verify that the DMIC works with the maximum number of channels possible
(defined based on the DTS compatible present in the build)
* Verify that the DMIC can restart sampling after being paused and resumed
* Verify that invalid channel maps (R/R pair, non-adjacent channels) are
rejected by the DMIC driver.
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