[Sound-open-firmware] [PATCH 0/7] [v3]DMIC: Patch series for direct attach microphones

[Seppo Ingalsuo]

This v3 patch set completes the missing changes from previous v2
patch set.

Only stereo S32_LE 48 kHz capture is supported due to hard wiring of DMIC
and DMA parameters. Configurable format will be introduced later.

The used SOF kernel driver and topology were test versions. Patches will
be upstreamed separately later.

This patch version was tested with the UP2 board on top of SOF git master
1e231b9dd297bc88c324502a561be67007604b16. Since there was no DMIC exHAT
board connected the capture only produced the DC compensation ramp shape
when the HW tries to compensate the max. full scale DC signal caused by
the non-toggling PDM data line. Ramp shape looked correct and there
were no discontinuities in PCM samples.

The CNL version has not been tested on a device.

Patch was also tested on a BYT device without DMIC capability where
DAI/SSP feature functioned OK.

Seppo Ingalsuo (7):
  [v3]DMIC: Add PDM microphones (DMIC) support to DAI
  [v3]DMIC: Add configure command switch to disable DMIC
  [v3]DMIC: DMIC: Add dmic.c to drivers Makefile.am
  [v3]DMIC: Changes to APL platform
  [v3]DMIC: Changes to CNL platform
  [v3]DMIC: Add for format.h conversion from fractional to float
  [v3]DMIC: Move ceil_divide from numbers.c to numbers.h as static
    inline

 configure.ac                                      |    6 +
 src/drivers/Makefile.am                           |    6 +-
 src/drivers/dmic.c                                | 1361 +++++++++++++++++++++
 src/include/sof/audio/format.h                    |    3 +
 src/include/sof/math/numbers.h                    |   15 +-
 src/math/numbers.c                                |   14 -
 src/platform/apollolake/dai.c                     |   59 +
 src/platform/apollolake/include/platform/memory.h |    5 +
 src/platform/apollolake/platform.c                |   12 +
 src/platform/cannonlake/dai.c                     |   57 +
 src/platform/cannonlake/include/platform/memory.h |    8 +-
 src/platform/cannonlake/platform.c                |   11 +
 12 files changed, 1537 insertions(+), 20 deletions(-)
 create mode 100644 src/drivers/dmic.c

-- 
2.14.1