[Sound-open-firmware] [RFC PATCH 0/6] Introducing a new API for dma_get()

[Ranjani Sridharan]

This set of patches proposes a new API for dma_get() that
procures a DMAC based on the requested user type, copy direction
and flags indicating shared/exclusive access. It also updates the
existing user of dma_get() to use the new API based on the specific
usage. The platform DMAC definitions have also been updated to
include information about usage and copy direction to support
the new API.

This has only been tested on the BYT platform with a Minnowboard
Turbot board and a RT5651 codec. Further testing is required on other
platforms to ensure there are no regressions. Looking for feedback on
initial implementation.

The corresponding DMAC/DMAC channel definitions from topology/kernel driver
need to be removed. This is still work in progress. 

Ranjani Sridharan (6):
  platform: dma: consolidate dmac initialization
  dma: ops: introduce channel_status() op to retrieve number of channels
    in use
  dma: introduce new API for requesting DMAC
  dma: use newly defined API for request DMAC
  dma: remove dmac id argument from dma_copy_context()
  trace: remove trace dmac id definition

 src/audio/dai.c                               |  7 ++-
 src/audio/host.c                              | 28 +++++++--
 src/drivers/dw-dma.c                          | 19 ++++++
 src/drivers/hda-dma.c                         | 20 ++++++
 src/host/common_test.c                        |  2 +-
 src/include/sof/dma.h                         | 38 +++++++++++-
 src/ipc/apl-ipc.c                             |  3 +-
 src/ipc/byt-ipc.c                             |  4 +-
 src/ipc/cnl-ipc.c                             |  4 +-
 src/ipc/dma-copy.c                            |  9 ++-
 src/ipc/hsw-ipc.c                             |  4 +-
 src/lib/dma-trace.c                           |  2 +-
 src/platform/apollolake/dma.c                 | 62 +++++++++++++++++--
 .../apollolake/include/platform/platform.h    |  3 -
 src/platform/apollolake/platform.c            | 21 +------
 src/platform/baytrail/dma.c                   | 50 +++++++++++++--
 .../baytrail/include/platform/platform.h      |  3 -
 src/platform/baytrail/platform.c              | 22 +------
 src/platform/cannonlake/dma.c                 | 62 +++++++++++++++++--
 .../cannonlake/include/platform/platform.h    |  3 -
 src/platform/cannonlake/platform.c            | 21 +------
 src/platform/haswell/dma.c                    | 58 ++++++++++++++---
 .../haswell/include/platform/platform.h       |  3 -
 src/platform/haswell/platform.c               | 16 +----
 24 files changed, 337 insertions(+), 127 deletions(-)

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2.17.0