[alsa-devel] [RFC PATCH 0/8] Prepare Sound Open Firmware (SOF) driver integration

[Pierre-Louis Bossart]

The Sound Open Firmware work [1] is progressing quickly and drivers
for the 1.0 release will soon be submitted upstream. Before we do so,
there is a new to reshuffle the ACPI integration and Intel
Kconfig/Makefiles. This RFC is a preview of what's coming, feedback
would be greatly appreciated.

We already have three incompatible drivers (BYT/HSW/BDW, Atom/BYT/CHT,
SKL+) for historical reasons, blindly adding yet another one would be
silly.  We need to avoid having the same ACPI routines and machine
tables duplicated in 3 locations (soc/intel/common, soc/atom/sst and
the upcoming soc/sof).

The ACPI routines should be part of sound/soc since there is no real
hardware dependency (ACPI is not limited to Intel).

The ACPI table definitions and quirks are moved to a soc/intel/common module
so that when new HIDs or quirks are added "legacy" and the SOF drivers
are updated at once.

The Makefiles/Kconfig are also modified to select the SOC(s) first and
the machine driver(s) second. The existing code only exposes machine
drivers which precludes reuse of machine drivers when SOF platform
drivers are selected. SOF drivers will be exposed in parallel to the
'Intel SST' ones (with an exclusive choice needed), but machine
drivers will be shared.

These patches apply on top of broonie/for-next + all the patches I
submitted this week (no dependency on SOF). For people with allergic
reactions to patches over email, the code is here:
https://github.com/plbossart/sound/commits/topic/acpi-updates

This patchset does not address the case where two drivers are selected
for the same ACPI HID. I just don't know of any technical solution to
that problem.

[1] https://www.alsa-project.org/main/index.php/Firmware

Pierre-Louis Bossart (8):
  ASoC: move ACPI common code out of Intel/sst tree
  ASoC: Intel: common: use c99 syntax for ACPI/machine tables
  ASoC: ACPI: add new fields for SOF support
  ASoC: Intel: move all ACPI match tables to common module
  ASoC: Intel: add SOF firmare/topology file information
  ASoC: Intel: move machine drivers to dedicated KConfig
  ASoC: Intel: reorder boards Kconfig by chronological order
  ASoC: Intel: clarify Kconfig dependencies

 include/sound/soc-acpi-intel-match.h               |  32 ++
 include/sound/soc-acpi.h                           | 107 ++++++
 sound/soc/Kconfig                                  |   3 +
 sound/soc/Makefile                                 |   6 +
 sound/soc/intel/Kconfig                            | 299 ++-------------
 sound/soc/intel/Makefile                           |   2 +-
 sound/soc/intel/atom/sst/sst_acpi.c                | 319 ++--------------
 sound/soc/intel/boards/Kconfig                     | 286 +++++++++++++++
 sound/soc/intel/boards/bytcht_da7213.c             |   6 +-
 sound/soc/intel/boards/bytcht_es8316.c             |   2 +-
 sound/soc/intel/boards/bytcr_rt5640.c              |  11 +-
 sound/soc/intel/boards/bytcr_rt5651.c              |   8 +-
 sound/soc/intel/boards/cht_bsw_rt5645.c            |  11 +-
 sound/soc/intel/boards/cht_bsw_rt5672.c            |   7 +-
 sound/soc/intel/common/Makefile                    |   4 +-
 sound/soc/intel/common/soc-acpi-intel-match.c      | 400 +++++++++++++++++++++
 sound/soc/intel/common/sst-acpi.c                  |  36 +-
 sound/soc/intel/common/sst-acpi.h                  |  82 -----
 sound/soc/intel/skylake/skl.c                      |  40 +--
 .../{intel/common/sst-match-acpi.c => soc-acpi.c}  |  56 +--
 20 files changed, 965 insertions(+), 752 deletions(-)
 create mode 100644 include/sound/soc-acpi-intel-match.h
 create mode 100644 include/sound/soc-acpi.h
 create mode 100644 sound/soc/intel/boards/Kconfig
 create mode 100644 sound/soc/intel/common/soc-acpi-intel-match.c
 delete mode 100644 sound/soc/intel/common/sst-acpi.h
 rename sound/soc/{intel/common/sst-match-acpi.c => soc-acpi.c} (63%)

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2.9.3